KR20200046526A - Screen control device and method for sight protection - Google Patents

Abstract

The screen control apparatus for protecting eyesight according to an embodiment of the present invention measures a distance from the user's face from the screen when the user's face is photographed by the camera unit that photographs the user's face existing in front of the device. A sensor unit performing a sensing operation to calculate a distance value from the user's face from the screen based on the value sensed by the sensor unit, and if it is determined that the distance value is less than a reference value, the screen display control for visual acuity control It may include a control unit to perform.

Description

Screen control device and method for eyesight protection {SCREEN CONTROL DEVICE AND METHOD FOR SIGHT PROTECTION}

The present invention relates to a screen control device and method for protecting eyesight. More specifically, the present invention relates to an apparatus and method for performing a screen control operation for protecting a user's eyesight according to a distance between a user and a device.

As the spread of various mobile user devices such as smart phones has expanded, it is possible to enjoy various activities through user devices wherever they are. In addition to this trend, many users are faced with the problem of poor vision due to wrong habits that damage their eyesight in their daily life, such as when using a mobile device for a long time or using a device at a close distance in a dark environment.

Accordingly, when users use various electronic devices equipped with a display unit, there is a need to develop a technology that induces a proper viewing distance and uses an appropriate time for visual acuity management.

On the other hand, as a related prior document, there is Korean Patent Registration No. 10-1580918 (Method for controlling an output screen of an application program for protecting eyesight of an application execution terminal user using a display unit).

The present invention has an object to protect a user's eyesight by controlling a screen display operation by grasping a user's viewing distance in real time in using various electronic devices having a display unit.

An object of the present invention is to determine the type of content being executed and perform screen display control according to the content type.

The screen control apparatus for protecting eyesight according to an embodiment of the present invention measures a distance from the user's face from the screen when the user's face is photographed by the camera unit that photographs the user's face existing in front of the device. A sensor unit performing a sensing operation to calculate a distance value from the user's face from the screen based on the value sensed by the sensor unit, and if it is determined that the distance value is less than a reference value, the screen display control for visual acuity control It may include a control unit to perform.

The present invention has an effect of instantly protecting the user's eyesight by controlling the screen display operation by grasping the viewing distance of the user in real time.

In addition, the present invention has the effect of protecting the user's eyesight without causing inconvenience in use because it enables a customized display control corresponding to the user's eyesight level and the item type of content being executed by the user.

1 is a block diagram showing the configuration of a screen control device for protecting eyesight according to an embodiment of the present invention.
2 is a block diagram showing the configuration of a screen control unit according to an embodiment of the present invention.
3 is a block diagram showing the configuration of a fatigue measuring unit according to an embodiment of the present invention.
4 is a flowchart illustrating a sequence of screen control operations corresponding to a user's eyesight according to an embodiment of the present invention.
5 is a flowchart illustrating a sequence of operations of a vision protection function according to an embodiment of the present invention.
6 is a flowchart illustrating a procedure of controlling a screen display based on fatigue combined with a plurality of variables according to an embodiment of the present invention.

The present invention can be applied to various changes and can have various embodiments, and specific embodiments will be illustrated in the drawings and described in detail.

However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In describing each drawing, similar reference numerals are used for similar components.

When a component is said to be 'connected' or 'connected' to another component, it is understood that other components may be directly connected to or connected to the other component, but other components may exist in the middle. It should be. On the other hand, when a component is said to be 'directly connected' or 'directly connected' to another component, it should be understood that no other component exists in the middle.

The terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, terms such as 'include' or 'have' are intended to indicate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, and that one or more other features are present. It should be understood that the existence or addition possibilities of fields or numbers, steps, operations, components, parts or combinations thereof are not excluded in advance.

An electronic device according to various embodiments of the present disclosure is a device having a display unit, for example, a smart phone, a tablet personal computer (PC), a mobile phone, a video phone, and an e-book reader (e-book reader), desktop PC (desktop personal computer), laptop PC (laptop personal computer), netbook computer (netbook computer), workstation (workstation), server, PDA (personal digital assistant), PMP (portable multimedia player) ), An MP3 player, a mobile medical device, a camera, or at least one of a wearable device.

In some embodiments, the electronic device may be a home appliance having a display unit. The home appliance may include, for example, at least one of a television, a digital video disk (DVD) player, a game machine, an electronic dictionary, and a camcorder.

1 is a block diagram showing the configuration of a screen control device for protecting eyesight according to an embodiment of the present invention.

First, referring to FIG. 1, a screen control device for protecting eyesight according to an embodiment of the present invention includes a communication unit 110, a storage unit 120, an input unit 130, a display unit 140, an audio processing unit 150, a camera unit 160, a sensor unit 170, and It may be configured to include a control unit 180. In addition, the storage unit 120 may store visual inspection information 121, control item information 122 for each content, and control level information 123 for each eyesight. In addition, the control unit 180 may include a vision inspection unit 181, a fatigue measurement unit 182, a message processing unit 183, a screen control unit 184, a pattern analysis unit 185, a target setting unit 186, and a reward providing unit 187.

The communication unit 110 may include, for example, a cellular module, a WiFi module, a Bluetooth module, a GPS module (eg, a GPS module, a Glonass module, a Beidou module, or a Galileo module), an NFC module, and a radio frequency (RF) module.

The cellular module may provide, for example, a voice call, a video call, a text service, or an internet service through a communication network. According to an embodiment, the cellular module may perform identification and authentication of electronic devices in a communication network using a subscriber identification module (eg, a SIM card). According to an embodiment, the cellular module may perform at least some of the functions that the processor can provide. According to an embodiment, the cellular module may include a communication processor (CP).

Each of the WiFi module, the Bluetooth module, the GPS module, or the NFC module, for example, may include a processor for processing data transmitted and received through a corresponding module. According to some embodiments, at least some (eg, two or more) of a cellular module, a WiFi module, a Bluetooth module, a GPS module, or an NFC module may be included in one integrated chip (IC) or IC package.

The RF module, for example, may transmit and receive communication signals (eg, RF signals). The RF module may include, for example, a transceiver, a power amp module (PAM), a frequency filter, a low noise amplifier (LNA), or an antenna. According to another embodiment, at least one of a cellular module, a WiFi module, a Bluetooth module, a GPS module, or an NFC module may transmit and receive an RF signal through a separate RF module.

The communication unit 110 according to an embodiment of the present invention may receive various information required for the operation of the present invention from the web. For example, the communication unit 110 may receive information related to visual inspection from a web or an application server (not shown) that performs a vision protection function. According to various embodiments of the present disclosure, an application installed to perform a vision protection function on a user device may collect member information for each terminal from a server and perform group and individual statistics based on the information. In this case, the server may generate a new control item for each content and a standard for a control level for each eye based on statistical data. The generated reference information can then be downloaded onto the application and applied when controlling the screen.

The storage unit 120 may include, for example, an internal memory or an external memory. The internal memory includes, for example, volatile memory (eg, dynamic RAM (DRAM), static RAM (SRAM), or synchronous dynamic RAM (SDRAM)), non-volatile memory (eg, OTPROM (one time programmable ROM (PROM), programmable ROM (PROM), erasable and programmable ROM (EPROM), electrically erasable and programmable ROM (EEPROM), mask ROM, flash ROM, flash memory (e.g. NAND flash or NOR flash, etc.), hard drives, Or it may include at least one of a solid state drive (SSD).

The external memory is a flash drive, for example, compact flash (CF), secure digital (SD), micro secure digital (Micro-SD), mini secure digital (Mini-SD), extreme digital (xD), It may further include a multi-media card (MMC) or a memory stick. The external memory may be functionally and / or physically connected to the electronic device through various interfaces.

The storage unit 120 according to an embodiment of the present invention may store the vision inspection information 121, content-specific control item information, and vision-specific control level information 123. The eye test information 121 is data required to perform an eye test through a user device. The visual acuity test information 121 may include text, pictures, and the like, and may be data produced in the form of a problem. In addition, the vision test information 121 may be stored by matching the correct answer information with the problem information. In addition, in this case, the correct answer information may include data required to enable the user to determine whether or not the correct answer is based on the input voice when the user answers by voice during the visual acuity test.

The control item information 122 for each content may be data in which criteria for classification of control items for each content type are summarized. For example, the control item corresponding to the text content may be set as 'enlarged font size', and the control item corresponding to the video content may be set as 'increasing resolution and decreasing the screen brightness level'.

The control level information 123 for each eyesight may be reference information regarding a screen control level corresponding to a user's eyesight level.

The input unit 130 may include, for example, a touch panel, a pen sensor, a key, or an ultrasonic input device. At least one of capacitive, pressure-sensitive, infrared, or ultrasonic methods may be used, and the touch panel may further include a control circuit.The touch panel further includes a tactile layer, It can provide a tactile reaction to the user.

The input unit 130 according to an embodiment of the present invention may receive a user input generated to perform an eye test, a request for driving a vision protection function according to an embodiment of the present invention, and the like.

The display unit 140 may include a panel. The panel can be implemented, for example, to be flexible, transparent, or wearable. The panel may be composed of a touch panel and one module.

The display unit 140 according to an embodiment of the present invention may display visual acuity test information on a screen during visual acuity test. In addition, the display unit 140 may apply a screen display setting change operation for protecting eyesight.

The audio processor 150 may convert, for example, a sound and an electrical signal in both directions. At least some components of the audio processing unit may be included in the input / output interface. The audio processing unit may process sound information input or output through, for example, a speaker, a receiver, an earphone, or a microphone.

The audio processing unit 150 according to an embodiment of the present invention may receive a voice that a user responds to in response to a problem for eyesight test when checking eyesight.

The camera unit 160 is, for example, a device capable of photographing still images and videos. According to an embodiment, one or more image sensors (eg, front sensors or rear sensors), lenses, and an image signal processor (ISP), Or it may include a flash (eg, LED or xenon lamp, etc.).

The camera unit 160 according to an embodiment of the present invention may photograph a user's face in order to perform a vision protection function. The face photographed at this time can roughly measure the distance between the user and the device screen according to the size information.

The sensor unit 170 may, for example, measure a physical quantity or sense an operating state of an electronic device, and convert the measured or sensed information into an electrical signal. The sensor unit includes, for example, a gesture sensor, a gyro sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor (eg, a red (green, blue) sensor), a bio sensor, It may include at least one of a temperature / humidity sensor, an illuminance sensor, or an ultra violet (UV) sensor. Additionally or alternatively, the sensor module can be, for example, an E-nose sensor, an EMG sensor, an electroencephalogram sensor, an ECG sensor, an electrocardiogram sensor, IR ( infrared) sensors, iris sensors and / or fingerprint sensors. The sensor unit may further include a control circuit for controlling at least one sensor included therein. In some embodiments, the electronic device may further include a processor configured to control the sensor unit as a part of the processor or separately, while controlling the sensor unit while the processor is in a sleep state.

When the user's face is photographed by the camera unit, the sensor unit 170 according to an embodiment of the present invention may perform a sensing operation to measure a distance from the user's face away from the screen. However, the present invention is not limited thereto, and the sensor unit 170 measures the viewing distance and fatigue required to operate the vision protection function (the function of controlling the screen display when the fatigue or viewing distance satisfies a certain condition) regardless of the camera unit. Can be operated. Sensors for measuring the distance between the device screen and the user may include, for example, a proximity sensor, an infrared sensor, an ultrasonic sensor, and a laser sensor.

The controller 180 may also be referred to as a processor, a controller, a microcontroller, a microprocessor, or a microcomputer. Meanwhile, the control unit may be implemented by hardware or firmware, software, or a combination thereof.

In the case of implementation by firmware or software, an embodiment of the present invention may be implemented in the form of a module, procedure, function, etc. that performs the functions or operations described above. The software code can be stored in the memory and driven by the control unit. The memory may be located inside or outside the user terminal and the server, and may exchange data with the control unit by various means already known.

The control unit 180 according to an embodiment of the present invention may include a vision inspection unit 181, a fatigue measurement unit 182, a message processing unit 183, a screen control unit 184, a pattern analysis unit 185, a target setting unit 186, and a reward providing unit 187.

First, the eyesight test unit 181 allows a user to perform an eyesight test in a state spaced apart from the device by a predetermined distance, and at this time, the eyesight test unit 181 provides eyesight test data for eyesight test on the screen and corresponding users Recognizes the voice of the answer to measure the user's eyesight. For example, the visual inspection unit 181 may activate the front camera of the device to control to photograph a user existing in front of the device. On the screen photographed in this way, the visual acuity test unit 181 extracts only the user's face image and senses the results of other sensor units, including the size of the detected face image (eg, the smaller the face size is measured, the farther it is). Accordingly, the front user can be controlled to measure the distance from the device.

Thereafter, the visual inspection unit 181 may compare a reference value of the separation distance required for the visual inspection with the separation distance between the actual user and the device. In addition, only when the actual separation distance is greater than or equal to the reference value, the visual inspection unit 181 may control to display data for visual inspection on the screen. The data for the visual acuity test may mean data including text (alphabet, Hangul, etc.) and images (animal images, etc.). In addition, the visual acuity test unit 181 may recognize the presence or absence of a correct answer by voice recognition of the user's answer corresponding to the data (text or image) being displayed, and may measure the user's vision through this check method. According to various embodiments of the present disclosure, the visual acuity test unit 181 may directly receive a touch input from a user and determine whether the displayed test data matches the user response.

The eye test unit 181 may measure a user's eyesight and provide data to the screen control unit 184, and accordingly, may perform a customized operation based on the result of the user's eyesight test when controlling the screen display.

The fatigue measuring unit 182 may be configured to include a distance measuring unit for measuring the distance between the user's eyes and the screen. Accordingly, if it is determined that the distance (viewing distance) between the user's eyes and the screen is less than a preset reference distance A signal for performing a preset screen control operation may be transmitted to the screen control unit 184. In addition, the fatigue measuring unit 182 may measure the fatigue of the user's eyes based on various measurement factors as well as the viewing distance, and transmit a signal requesting a screen control operation to the screen control unit 184 when it is determined that the fatigue level is higher than a predetermined value.

The fatigue measuring unit 182 may further measure time information maintaining a corresponding distance in addition to distance information between the user's eyes and the screen. In addition, environment information may be collected, and the environment information may include the current screen brightness of the device, the type of content being executed (eg, classified into video, text, and images), and ambient brightness. The fatigue measuring unit 182 may determine, for example, whether the screen brightness of the device is higher than a preset value based on the environment information. In addition, if the screen brightness of the device compared to the ambient brightness is greater than a preset value, the fatigue measurement unit 182 may control to set the reference value of the user's viewing distance longer than the normal reference value.

In addition, the fatigue measurement unit 182 may comprehensively determine the viewing distance and the retention time for each viewing distance to calculate the fatigue level and request the screen control unit to perform screen control based thereon. For example, the sensed user's viewing distance is less than the reference distance (eg, 40 cm), and the time the error is maintained at the point corresponding to the first stage (eg, within 5 cm) is 1 minute, and the same user subsequently determines the reference distance. When the time maintained at a point where the error is less than (eg, 40 cm) and the error is 2 steps (e.g., 5 cm or more and within 10 cm) is 2 minutes, the fatigue measuring unit 182 (error step for a reference distance) * (maintain Time) can be added to calculate the final fatigue. Therefore, the fatigue measurement unit 182 may calculate the fatigue value in the same manner as in the above example (step 1) * (60s) + (step 2) * (120s).

In addition, the fatigue measurement unit 182 may calculate fatigue in a manner including environmental information (eg, screen brightness compared to ambient illumination), as well as 'error steps for a reference distance' and 'retention time'.

Thereafter, when the calculated fatigue level of the user exceeds the reference fatigue value, the fatigue measurement unit 182 may request screen display control from the screen control unit 184.

The message processing unit 183 may be controlled to create a warning message and display it on the screen when the user's fatigue level measured by the fatigue measurement unit 182 exceeds a reference value or when the measured user's eye fatigue level increases rapidly. . The warning message may be displayed before the screen control operation. According to various embodiments, the warning message may be displayed together when a screen control operation is performed.

Also, the message processing unit 183 may control to output a warning message when the target use time set by the target setting unit 186 is exceeded. In addition, the message processing unit 183 may provide the warning message with harmful electromagnetic wave exposure information emitted during the time the user has used the device.

The screen control unit 184 may perform an operation of controlling a screen display based on a user's eye fatigue value or the like. At this time, the operation of controlling the screen display includes, for example, an operation of adjusting the brightness of the screen, an operation of increasing the size of text displayed on the screen, an operation of temporarily not displaying the screen until the viewing distance of the user exceeds a reference distance, etc. This can be included.

The screen control unit 184 may also change a control item according to a content type or a control level based on the user's visual acuity information. For example, the screen control unit 184 controls to enlarge the font size when controlling the screen when the type of the content being displayed on the current screen is text content, and pauses playback of the content when the type of the content being displayed is a video. Control. As such, the screen control unit 184 may determine the type of the content being executed, and provide different control operations in response thereto.

In addition, the screen control unit 184 may change the control level based on the user's visual acuity information measured by the visual acuity test unit 181. For example, if the screen brightness is set to be reduced by two steps during normal screen control, when the user's eyesight is determined to be high-level myopia, which is a level lower than the reference value, the screen brightness is set lower than the normal control level (two steps) (eg , Decrease by 1 step). Alternatively, the screen control unit 184 may control a user whose visual acuity is lower than a reference value to postpone the time to perform screen control for a predetermined time (eg, 30 seconds) or more. This may be a differential control considering that the viewing distance of a user with poor eyesight will be closer than the viewing distance of a user with average eyesight.

The pattern analysis unit 185 may analyze a user's device usage pattern and viewing distance pattern. Also, the pattern analysis unit 185 may analyze a viewing distance pattern for each content and a viewing distance pattern for each time zone. The device usage pattern includes information on content and programs that the user mainly executes using the device, and the viewing distance pattern may include information on a user's viewing distance change with respect to the user's device usage time. For example, the viewing distance pattern may be related to whether the user's viewing distance decreases or increases as the device usage time increases.

The viewing distance pattern for each time zone may be data information classified by classifying the viewing distance information of the user for each time zone. At this time, the time zone information may be divided into 1 hour units, such as 1, 2, or 3, and commute. It may be classified according to the user's life pattern, such as time (7-9 AM, 6-8 PM), pre-sleep time (8-12 PM), and activity time (9 AM-6 PM). If the user has an average of 0 to 1 screen display limit to protect eyesight during commute time and activity time, but the average number of screen display limits to average 5 or more times before bedtime, the pattern analysis unit 185 Information can be presented to the user. Accordingly, the user can grasp the viewing habits that increase the fatigue of the eyes performed during a specific time period without the user's knowledge.

In addition, when the pattern information of the user is completed, the pattern analysis unit 185 may provide it to the target setting unit 186 so that the target for vision protection can be set based on the user's viewing pattern.

The target setting unit 186 sets a target value of the number of times a screen is controlled according to device usage time and device viewing distance for each content, or fatigue to protect a user's eyesight based on a user's current vision state and a user's device usage pattern. You can.

The reward providing unit 187 may determine whether or not a target value for each user set by the target setting unit 186 is achieved, and provide a reward according to whether the target value is achieved. In addition, according to various embodiments, the reward providing unit 187 may provide a reward based on a degree of improvement of a user's pattern analyzed by the pattern analysis unit 185 as well as whether a target value is achieved. At this time, the user's viewing pattern may be scored, and a result checked for a certain period, such as a weekly pattern score and a monthly pattern score, may be scored. In addition, the reward provider 187 may provide a reward when the degree of enhancement of the score according to the viewing pattern is greater than or equal to a preset value (or ratio). The reward may be composed of, for example, an image that reduces eye fatigue. According to various embodiments, the reward may be determined based on the ranking of multiple users assigned by the server managing the application, and thus, eye health related products provided by the server may be paid as a product.

2 is a block diagram showing the configuration of a screen control unit according to an embodiment of the present invention.

The screen control unit 184 may include a content determination unit 184a, a content-based control unit 184b, a vision information-based control unit 184c, and a use stop induction unit 185d.

First, the content determination unit 185a may determine the type of execution content based on a program being displayed on the screen. For example, when the video playback program is executed, the content determination unit 185a may determine that the currently displayed content is video content, and when the keyboard application is operating, determine that the text content is being displayed. Also, according to various embodiments of the present disclosure, the content determination unit 185a may determine a content type based on an extension of a running file. At this time, the content type may be divided into, for example, a video, an image, and text.

The content-based control unit 184b may perform screen control according to the content type. The content-based control unit 184b, for example, when it is determined that the content type is text, is a method of adjusting the size of the text displayed on the screen when controlling the screen display according to the fatigue level measured by the fatigue measurement unit 182 is greater than or equal to a preset reference value. Control can be performed.

The vision information-based control unit 184c may perform screen control based on the user's vision information. At this time, the user's visual acuity information may be referenced based on the result measured by the visual acuity test unit 181. Alternatively, according to various embodiments, a user may directly input his / her eyesight information, and accordingly, the eyesight information-based control unit 184c may perform screen control based on the user's eyesight information directly input by the user.

The eyesight information-based controller 184c may set a level to control the screen based on the user's eyesight information. For example, in a screen control operation for a user with standard visual acuity (eg, 1.5), if the degree of text size expansion per control is 2 points, for a user with low visual acuity (eg, 0.3), the text size per control is expanded. The degree can be set to increase to 3 points. Alternatively, the visual acuity information-based control unit 184c may differentially set a grace time for performing screen control according to a user's visual acuity level. In addition, the visual information-based control unit 184c can apply various methods when setting a screen display control level corresponding to a user's visual acuity value.

The stop using induction unit 184d may perform an operation for inducing the user to stop using the device. For example, the stoppage inducing unit 184d may turn off the power of the display unit to cause the user to temporarily suspend the use when the user's eye fatigue is greater than a preset reference value or the device is being used at a very close distance to the user's target value. have. Alternatively, in addition to the above-described method, the use stop inducing unit 184d may control the user to voluntarily stop using the screen or display an alternate image (eg, a landscape photo) by blinking the screen. If it is determined that the user has sufficiently rested his eyes after a certain time, the stop using induction unit 184d may release the stop inducing operation.

3 is a block diagram showing the configuration of a fatigue measuring unit according to an embodiment of the present invention.

Referring to FIG. 3, the fatigue measurement unit 182 according to an embodiment of the present invention may include a distance measurement unit 182a, a time recording unit 182b, and an environmental information collection unit 182c.

First, the distance measuring unit 182a may measure a distance spaced from the screen of the device to the user's eye. The method for measuring the distance of the user from the device screen in the distance measuring unit 182a is not particularly limited. For example, the distance measuring unit 182a may measure a separation distance between the user and the screen based on the detection signal detected by the sensor unit. Alternatively, the distance measuring unit 182a may measure an approximate distance between the user and the screen device based on the size of the user's face photographed using the camera unit. According to various embodiments, the distance measuring unit 182a may set a distance measuring method differently according to an operation mode. For example, when measuring a distance between a user and a device to perform an eye test, the distance measurement unit 182a may apply a distance calculation based on the size of a specific part (eg, face, eyes) of the user detected using the camera unit. have. And when determining whether to control the screen to protect eyesight, the distance measuring unit 182a applies a distance calculation based on the measurement results measured by the sensor unit (eg, proximity sensor, infrared sensor, ultrasonic sensor, laser sensor, etc.). You can. The distance measuring unit 182a can calculate fatigue using only the distance measured according to the mode. According to an embodiment of the present disclosure, if the user's face or eyes are detected at a location within a predetermined distance regardless of the holding time, the distance measuring unit 182a may immediately apply the eye fatigue value above a predetermined value.

The time recording unit 182b may measure a retention time for each viewing distance of the user (a distance between the device screen and the user's face or eyes). In this case, the time recording unit 182b may measure duration within all viewing distances, but only within a predetermined distance range. At this time, the preset distance range may be composed of several steps. For example, when the first step distance range is set to 40 cm to 30 cm, the second step distance range is set to 30 to 20 cm, and the third step distance range is set to 20 cm or less, the time recording unit 182b is the time maintained in step 1, the second step range The time maintained at and the time maintained at step 3 can be measured separately and fatigue based on this can be calculated.

The environment information collecting unit 182c may collect information on factors other than the distance and the maintenance time at the distance and measure fatigue based on the information. The environment information collected by the environment information collection unit 182c may include, for example, brightness of a device screen, ambient brightness, and the like.

4 is a flowchart illustrating a sequence of screen control operations corresponding to a user's eyesight according to an embodiment of the present invention.

According to an embodiment of the present invention, the controller 180 may perform operation 405 to perform an eye test before performing the vision protection function on the device. In this case, when the user directly inputs his / her eyesight information as a numerical value, the controller 180 may omit the eyesight test operation. The visual acuity test may be performed by presenting the visual acuity test information 121 pre-stored in the storage 120. The visual acuity test information 121 may mean data required for a visual acuity test, may be composed of text characters, pictorial characters, and the like, and may be data created in a problem format. In addition, the text characters, pictograms, and the like may be presented one by one on the screen, and at this time, a visual inspection may be performed in a manner in which the user makes a correct answer with voice. Accordingly, the visual acuity test information 121 may be stored in the form of data in which correct answer information for each problem is matched together, and the correct answer information may include data for recognizing a user's answer voice.

Thereafter, the controller 180 may perform operation 410 of applying a screen control level corresponding to the result of the visual acuity test. According to various embodiments of the present disclosure, the control unit 180 may perform an eye test every predetermined period, determine a change in vision, and apply a screen control level based on this. For example, if it is determined that the visual acuity value has decreased in the last month, it may be set to increase the reference distance (reference value of the viewing distance) for performing screen control. Alternatively, when the visual acuity is evaluated to be lower than the standard visual acuity, the control unit 180 may set the control level to be increased by one step higher than the standard changing step when controlling a screen for protecting eyesight. For example, if the standard control level is to decrease the brightness by 2 levels in the first screen control, the control unit 180 may set the screen brightness to decrease by 3 levels per screen control in the case of a user who has eyesight lower than the standard vision. have.

5 is a flowchart illustrating a sequence of operations of a vision protection function according to an embodiment of the present invention.

Referring to FIG. 5, the controller 180 may perform operation 505 of driving the vision protection function when the vision protection function is requested by the user. While the vision protection function is being driven, the controller 180 may perform operation 510 of measuring the distance between the user and the screen in real time. At this time, the control unit 180 may measure the distance in real time by driving the sensor unit or the camera unit for distance measurement even if it is not displayed on the screen.

Thereafter, the controller 180 may perform operation 515 for controlling the screen display based on the measurement distance. In the case of the operation 515, the screen display is controlled only by whether the viewing distance is within a reference value without reflecting variables other than the distance between the user and the screen. However, the present invention is not limited to this, and the screen display control may be performed based on fatigue combined with multiple variables.

6 is a flowchart illustrating a procedure of controlling a screen display based on fatigue combined with a plurality of variables according to an embodiment of the present invention.

Referring to FIG. 6, first, the controller 180 may perform operation 605 of driving the vision protection function according to a user request, and then the controller 180 may perform operation 610 of measuring the distance between the user and the screen accordingly. . In addition, the controller 180 may perform operation 615 of collecting environmental information, wherein the environmental information may include screen brightness, ambient brightness, and screen brightness versus ambient brightness. After collecting the environmental information together, the control unit 180 may perform operation 620 for calculating fatigue based on the collected distance information and environmental information. According to various embodiments of the present disclosure, the fatigue may be calculated on the basis of the maintenance time information and environment information for each distance.

Thereafter, the controller 180 may perform operation 625 for controlling the display of the fatigue-based screen. The screen display control method may include adjusting the screen brightness, adjusting the text size displayed on the screen, and limiting the display to request to temporarily stop viewing the screen. In addition, the operation 625 may include an operation of controlling a screen display for each fatigue level according to various embodiments. For example, when the maximum fatigue level is 100 and the risk level is 40, the control unit 180 displays only a warning message for screen display control at the moment when the fatigue level exceeds 40, and increases the screen font size when the fatigue level exceeds 60 Or perform an operation to reduce the screen brightness, and when the fatigue level is 80 or more, the screen power can be turned off. As described above, the fatigue-based screen display control method according to an embodiment of the present invention may be a method for providing different functions step by step.

Although the present invention has been described in detail with reference to the above-mentioned examples, those skilled in the art can make modifications, alterations, and modifications to the examples without departing from the scope of the present invention. In short, in order to achieve the intended effect of the present invention, it is not necessary to separately include all the functional blocks shown in the drawings or to follow all the order shown in the drawings in the order shown, and even if not, any number of technical aspects of the present invention described in the claims Note that it can fall within the scope.

110: communication unit
120: storage unit
121: vision test information
122: Control yield information by content
123: Control level information by eyesight
130: input unit
140: display unit
150: audio processing unit
160: camera unit
170: sensor unit
180: control unit
181: Vision inspection department
182: fatigue measurement unit
183: message processing unit
184: screen control
185: pattern analysis unit
186; Goal setting unit
187: reward provider

Claims (9)

A camera unit for photographing the face of a user existing in front of the device;
When the user's face is photographed by the camera unit, a sensor unit performing a sensing operation for measuring a distance from the user's face away from the screen;
A control unit that calculates a distance value of the user's face separated from the screen based on the value sensed by the sensor unit, and performs screen display control for eyesight protection when the distance value is determined to be below a reference value; Screen control device for eyesight protection comprising a. According to claim 1,
The control unit
Fatigue measurement to measure the user's fatigue based on environment information including whether the distance value from the user's face away from the screen is below the reference value, the time at which the distance value is kept below the reference value, and environment information including current brightness information of the device screen. part;
When it is determined that the user's fatigue level measured by the fatigue measurement unit is greater than or equal to a preset value, screen display control for vision protection is performed, but the screen display control method includes screen brightness control, display pause, and warning text display. Screen control unit; Screen control device for protecting eyesight comprising a. According to claim 1,
The control unit
An eye sight test unit that performs a visual acuity test in a state where the user is separated from the device by a predetermined distance, provides visual acuity test data for a visual acuity test on a screen, and recognizes a user's answer voice to measure a user's vision; Including,
The screen control unit
A screen control device for protecting eyesight comprising providing a screen control operation to which a user's eyesight is measured by the eyesight inspection unit, but applying a screen control level corresponding to a value of the user's eyesight measured by the eyesight inspection unit. According to claim 3,
The screen control unit
When the screen control level is applied in response to the user's visual acuity measured by the visual acuity tester, if it is determined that the user's measured visual acuity is less than or equal to a predetermined standard visual acuity, the screen brightness level adjusted per screen control is set. Screen control device for eyesight protection, characterized in that the upward than the standard adjustment step. According to claim 2,
The screen control unit
A content determination unit that determines the type of content currently being driven on the screen; And
Includes a content-based control unit that sets a screen control method of a different type according to the content type, and controls the screen in a manner corresponding to the identified content type when the type of content currently being driven on the screen is confirmed by the content determination unit. Screen control device for eyesight protection, characterized in that. According to claim 1,
The control unit
And a pattern analysis unit analyzing a user device usage pattern based on the number of screen control operations per user's usage content and the number of screen control operations per usage time. According to claim 1,
The control unit
A target setting unit for setting target values of device usage time and device viewing distance for each content to protect the user's eyesight based on the user's current vision state and user's device usage pattern; And
And a reward providing unit that provides a reward to a user who has achieved a user target value set by the target setting unit. According to claim 1,
The control unit
When the target use time set by the target setting unit is exceeded, control is performed to output a warning message, but a message processing unit providing the warning message with harmful electromagnetic exposure information emitted during the time the user has used the device; includes Screen control device for eyesight protection, characterized in that. In the screen control method for eyesight protection,
Performing a sensing operation to measure a distance from the user's face away from the screen by at least one of a camera unit and a sensor unit;
Calculating a distance value separated from the user's face from the screen based on the sensing value measured according to the sensing operation by the control unit;
If it is determined that the calculated distance value is less than or equal to a reference value, performing a screen display control operation for protecting eyesight; Screen control method for eyesight protection comprising a.

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