KR101110753B1 - Input module capable of detecting touch point and pressure, recognition module and screen input device including them - Google Patents

Abstract

The present invention relates to an input module and a recognition module capable of expressing attributes such as thickness and concentration on an input path capable of simultaneously detecting a touch point and pressure, and a screen input device including the same. According to an embodiment of the present invention, a screen input device for recognizing a touch point on a flat screen of the screen, the light emitting unit for emitting light in the horizontal direction by applying power, the pressure pressed by the light emitting unit At least two at the edge of the screen and the input module including a pressure sensor for detecting a property and a property control unit for controlling the property of the light emitted from the light emitting unit based on the pressure sensed by the pressure sensor and the light emitting unit Sensor unit for detecting the light emitted from the and relative position of the light detected by the sensor unit It detects the touch point on the screen and screen input device comprising: a recognition module including a detection unit for detecting the pressure value pressing the screen by the properties of the light are provided.

Description

Input Module, Identification Module and Screen Input Device Having The Same Capable of Detecting Touch Point and Pressure}

The present invention relates to a screen input device, and more particularly, an input module and a recognition module capable of expressing attributes such as thickness and concentration on an input path through which a touch point and pressure can be detected simultaneously, and a screen input device including the same. It is about.

In general, a touch type input device is used as an electronic device such as a computer and is widely used as a pointing device or an input device.

Such a touch type input device may be implemented as a decompression type, an electrostatic type, an infrared type, a camera type, and the like. As well as computers, the use of such devices as mobile phones, monitors, and various portable devices has been widely expanded. It can be used to draw a picture using a touch input device instead of paper.

On the other hand, the camera-type screen input device, the camera having a certain angle of view is disposed on the edge of the screen, and is formed in the form of detecting the touch point by analyzing the image detected by the camera.

In this regard, Figure 1 is a conceptual diagram of a "camera type touch screen using a linear infrared light emitter" of Korean Patent No. 0910024.

Referring to FIG. 1, in the conventional touch screen device, a linear infrared light emitter 20 disposed on three edges of the edge supporting the rectangular screen 10 to emit infrared light and the linear infrared light emitter 20 are not disposed. The small camera 30 is installed at both ends of the edge of the other side of the other side and detects the infrared rays emitted from the linear infrared light emitter 20, and the infrared signal detected by the small camera 30 to analyze the user's screen touch point It consists of a control board 40 to calculate the.

In addition, the linear infrared light emitter 20 is provided with infrared LEDs 22 at both ends of the light emitter, and the light emitted from the infrared LED passes through the resin rods 24 so that the linear resin rods are formed by total internal reflection ( 24) The whole is configured to emit light to the outside.

Since the position of the video image is calculated as the camera angle, the two cameras 30 installed at the two corners read one position within the rectangle constituting the screen as the respective camera angle, and the control board 50 ) Is converted to horizontal and vertical rectangular coordinates by applying an angle survey technique. If the user touches a point on the screen plane with a finger or a touch pen, the camera 30 detects a shadow in which infrared light emitted from the linear infrared light emitter 40 of the opposite edge is blocked by the finger. 30 reads the position angle of the shadow from which the control board 50 calculates the position of the finger as the coordinates.

However, the conventional touch screen device having the above-described configuration has a space limitation because a linear light emitter should be provided at three sides for coordinate recognition, and there is a problem in that the installation process is complicated and the manufacturing cost increases.

In addition, in view of the recent trend in which a device capable of simultaneously detecting various input information is required, a conventional touch screen device which receives only position information of a touch point has a limit in the amount of information.

In addition, when the user touches the palm with his or her finger while the palm touches the touch screen, the palm touches the touch screen, resulting in interference of the signal and cannot be distinguished from the exact touch point indicated by the finger. There was a problem that could not be detected.

The present invention is to overcome the above problems and limitations, the present invention is provided with a dedicated input module can accurately detect the touch point even without a separate light emitter on the screen and at the same time detect the pressure applied to the screen To provide a screen input device that can be.

In order to achieve the above object, the present invention provides a screen input device that recognizes a touch point on a flat screen, the light emitting unit for emitting light in the horizontal direction by applying power, the light emitting unit is pressed by the screen At least two at the edge of the screen and an input module including a pressure sensor for detecting a pressure and a property control unit for controlling the property of the light emitted from the light emitting unit based on the pressure sensed by the pressure sensor and the light emitting And a detection unit for detecting a touch point on the screen by a relative position of the light detected by the sensor unit and a pressure value for pressing the screen by the property of the light. It is configured to include a recognition module.

Here, the attribute control unit controls any one of the flickering period, the intensity and the wavelength of the light emitted from the light emitting unit, the detection unit to detect the pressure corresponding to the attribute of the light controlled by the attribute control unit It is preferable to construct.

The input module may further include an external manipulation unit configured to manipulate attribute values toward the attribute control unit by external manipulation of the user.

The light emitting unit may be configured to include an infrared light emitting device for emitting infrared light and a light transmitting member made of a transparent material for forwarding the light emitted from the infrared light emitting device.

On the other hand, the light transmitting member is provided to be movable along the longitudinal direction, it may be configured to transfer the pressure at the end to the pressure sensor side. In addition, the light emitting unit may be provided at the end of the light transmitting member, it may include a reflective member for transmitting the light transmitted from the light transmitting member in the transverse direction.

On the other hand, the screen is a rectangular flat plate; The sensor unit may be provided on at least two of four corners of the screen.

According to one embodiment of the invention, the sensor unit, an infrared filter for selectively transmitting only infrared light from the incident light, a lens assembly for collecting the light passing through the infrared filter and the light passing through the lens assembly as an image image It may be configured to include an image sensor to convert.

The detection unit may be configured to generate a path based on the detected touch point, and generate a thickness or concentration attribute of a corresponding point of the path based on the detected pressure value.

According to the present invention, a touch type input device provided with a pressure sensor has the following effects.

First, by providing a dedicated input module for emitting light, it is possible to accurately detect the touch point without having a separate light emitter on the screen, detect the pressure applied to the screen and change the properties of the light accordingly to the screen There is an advantage that the applied pressure value can be detected at the same time.

Therefore, even if the data is not transmitted to the separate processor by wire or wirelessly, the pressure applied to the screen is reflected in the property of light and detected by the recognition module, so that the pressure value can be detected simultaneously with the touch point on the screen.

In particular, by reflecting the sensed pressure value as a change in the flashing cycle of light, there is an advantage that it is possible to detect the pressure value more easily and accurately.

Second, the light emitted from the infrared light emitting element is effectively transmitted in the horizontal direction, that is, the screen direction of the screen while passing through the light transmitting element and the reflecting member provided at the end thereof, thereby improving the recognition rate through the sensor unit.

Third, by accurately detecting the touch point and the pressure value at the same time, by applying the pressure value on the path to the thickness or concentration, etc., the application is more intuitive to use and the user convenience is increased.

Fourth, an external control unit for controlling the property of the light is provided by the user, so that the user can select a variable mode that varies according to the pressure value according to the situation and a manual mode that specifies the property according to the user-specified value. Depending on the thickness or concentration of the path to change, or there is an advantage that the user can arbitrarily set the thickness or concentration on the path.

1 is a conceptual diagram illustrating a conventional touch screen input device;
2 is a perspective view showing a screen input device according to an embodiment of the present invention;
3 is a configuration diagram showing a main internal configuration of the input module of FIG.
4 is a view for explaining a transmission path of light emitted from a light emitting unit in the input module of FIG. 3;
5 is a view for explaining a change in the flashing cycle of light based on the pressure in the input module of FIG.
FIG. 6 is a perspective view illustrating a configuration of an external manipulation unit of the input module of FIG. 3; FIG.
7 is a configuration diagram showing a main internal configuration of the recognition module of FIG.
8 is a view for explaining a process of detecting a touch point through the light detected by the sensor unit; And
FIG. 9 is a diagram for describing a process of generating a property of a path based on a path and a pressure value of a detected touch point.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In describing the present embodiment, the same designations and the same reference numerals are used for the same components, and further description thereof will be omitted.

Referring to Figures 2 and 3, the overall configuration of the screen (S) input device according to an embodiment of the present invention will be described as follows.

The screen (S) input device according to the present embodiment is provided on the edge of the input module 100 and the screen (S) that emits large light, the recognition module 200 for detecting the touch point and the pressure value by detecting the light It consists of

The input module 100 includes a light emitting unit 120, a pressure sensor 130, an attribute control unit 140, and an external manipulation unit 190.

The light emitting unit 120 is configured to emit light in the horizontal direction by receiving power, specifically, the infrared light emitting device 122 for emitting infrared light, and the light emitted from the infrared light emitting device 122 to the front forward It comprises a light transmitting member 124 of the transparent material and a reflective member 126 for transmitting the light transmitted from the light transmitting member 124 in the transverse direction at the end of the light transmitting member 124.

In the present embodiment, the infrared light emitting element 122 is made of LED, but is not limited thereto.

As shown in FIG. 2, the light transmitting member 124 according to the present embodiment is formed to be elongated in the longitudinal direction, and an accommodation groove 124b for accommodating the infrared light emitting element 122 is formed at one end thereof.

In addition, the other end of the light transmitting member 124 is provided with a reflective member 126, and serves to transmit the path of the light transmitted through the light transmitting member 124 in the lateral direction.

As shown in FIG. 3, the light transmitting member 124 according to the present embodiment includes a stopper 124a and is provided with a first stepped part 112 provided on the main body 110 of the input module 100. ), The travel distance in the longitudinal direction is determined.

In addition, an elastic member 160 is provided between the stopper 124a of the light transmitting member 124 and the second stepped portion 114 of the main body 110 to move the light transmitting member 124 to the rear side by pressure. Is restored to its original position.

The light is related to the transmission path will be described later with reference to FIG.

On the other hand, the light transmitting member 124 is provided to be movable in the longitudinal direction, the reflecting member 126 is in contact with the screen (S) to transfer the pressure to the infrared light emitting element 122 and the pressure sensor 130 side Play a role.

The pressure sensor 130 is provided on the rear surface of the light emitting unit 120 material, and detects the pressure generated while the light emitting device 122 of the infrared unit 120 moves to the rear side.

The attribute controller 140 controls the attribute of light emitted from the light emitter 120 based on the pressure sensed by the pressure sensor 130.

The light property may be a blinking period, an intensity, a wavelength, or the like. In this embodiment, the on / off control of the light emitting unit may be performed in parallel according to the pressure value. An example thereof will be described later with reference to FIG. 5.

On the other hand, the input module 100 is provided with a built-in battery 150 for applying power to the light emitting unit 120 and the property control unit 140 side, it can be used freely without a separate cable connected to the input module 100. It is preferably configured to.

The built-in battery 150 may be provided in various forms and may be configured to be replaced by a battery or may be configured to be charged.

The recognition module 200 is provided with at least two on the edge of the screen (S), detects the light emitted from the input module 100 and the touch point and pressure on the screen (S) through the detected light information A component that detects a value.

The recognition module 200 is composed of a sensor unit (not shown) and a detection unit (not shown).

In this embodiment, the screen (S) is composed of a flat plate of a rectangular shape, the sensor unit is exemplified in the form of a pair of adjacent corners of the four corners of the screen (S).

In addition, in order to minimize unnecessary reflection of light emitted from the input module 100 and to sense only light emitted directly from the input module 100, the sensor unit may contact the input module 100 of the screen S. Cotton is preferably made of a material that absorbs light.

On the other hand, the detection unit is configured to detect a touch point on the screen (S) by the relative position of the light detected by the sensor unit, and detect the pressure value for pressing the screen (S) by the nature of the light.

Therefore, the detection unit detects the pressure value in response to the property of the light controlled by the property control unit 140.

Next, a process of changing the light transmission path will be described with reference to FIG. 4.

As shown in FIG. 4, the light emitted from the infrared light emitting element 122 is transmitted to the end side along the light transmitting part formed along the longitudinal direction, and is transversely direction by the reflecting member 126 formed at the end of the light transmitting part. It is configured to change the path of light.

Specifically, the reflective member 126 is composed of a contact surface 126a in direct contact with the screen S and a reflective surface 126b for changing the direction of light transmitted through the light transmitting member 124 in the horizontal direction. .

Referring to FIG. 5, the attribute of light controlled by the attribute controller 140 will be described below.

As described above, the factor that can be controlled by the attribute control unit 140 may be a flashing cycle, intensity, or wavelength of light. In this embodiment, the form of changing the blinking cycle property of light which is the most easy to control and has a good recognition rate is illustrated.

As shown in FIG. 5, the light emitted from the infrared light emitting device 122 is flickered, and the flickering period is changed depending on the pressure value detected by the pressure sensor 130.

Thus, for example, when the pressure sensed by the pressure sensor 130 is 1 Pa, it blinks in a flashing pattern having a period of T ₁ as shown in (a) of FIG. 5.

In addition, when the pressure sensed by the pressure sensor 130 is 3/2 Pa, in response thereto, the period of flickering is slightly shortened by the period of T ₂ as shown in FIG. Assuming a linear pattern, T ₂ is 2/3 of T ₁ .

Next, when the pressing pressure is further increased and the pressure sensed by the pressure sensor 130 becomes 2 Pa, the period in which the flashing in the period of T3 becomes shorter as shown in FIG. 5C. In the case of a linear pattern, T ₃ is 1/2 of T ₁ .

In other words, when the pressure value is doubled, the cycle of light blinking is reversed to 1/2 and blinks twice as fast.

The present embodiment exemplarily illustrates a dependency relationship in which the pressure value sensed by the pressure sensor 130 and the flashing period are inversely proportional to each other by a simple linear pattern, but are not limited thereto.

On the other hand, the property control unit 140 may be controlled by changing the light property of the other forms other than the flashing cycle of light.

For example, when the illuminance is changed to increase the pressure value, the luminous intensity emitted from the light emitting device 122 changes in units of cd, and the sensor unit of the recognition module 200 also corresponds to the intensity of light. It is also possible to configure it to detect and thereby recalculate the pressure value.

In this case, since the intensity of light detected by the sensor unit may vary according to the point where the input module 100 touches on the screen S, the amount of change in intensity of light dependent on the pressure value may need to be relatively large. .

On the other hand, the property of the light may be the wavelength of the light. The wavelength band of light emitted from the infrared light emitting device 122 is changed depending on the pressure value, or the plurality of small light emitting devices 122 having different wavelength bands from each other are provided, and the corresponding light emitting device 122 according to the pressure change is provided. It is also possible to include information about the pressure value in the light properties by causing the light to be emitted.

On the other hand, in order to selectively operate only when the light emitting device 122 touches on the screen S without continuously blinking, the attribute control unit 140 is the light emitting device 122 when the predetermined pressure value or more When the operation is below a certain pressure value, it is preferable to perform the on-off control in parallel so as to stop the operation of the light emitting device 122.

Referring to Figure 6, when explaining the principle of the external control unit 190 on the input module 100 as follows.

As described above, the property of the light is changed according to the pressure value detected by the pressure sensor 130, and the detection module 200 detects the pressure value.

However, in contrast, the user can be manipulated externally to determine the property of light.

As shown in FIG. 6, the external manipulator 190 is configured in the form of a lever to select a variable mode and a manual mode by pressure. In detail, the light property may be varied in the pressure value detected by the pressure sensor 130 by the "pressure dependent" mode, and the light property may be directly determined according to the manual mode such as "0.5" and "0.7". It becomes possible.

Numbers such as "0.5" and "0.7" indicate the thickness of the path. For example, in the manual mode of "0.5", the flashing period of light is defined as T _ref /0.5, and "0.7" In this case, the flashing cycle of light is defined as T _ref /0.7, so that the higher the number, the shorter the flashing cycle of light is, so that the flashing is quicker. The thickness can be made thicker.

Referring to Figure 7, when explaining the internal configuration of the sensor unit according to an embodiment of the present invention.

As described above, the sensor unit according to the present embodiment is provided with a pair at the corner portion of the screen (S), it detects the light emitted from the input module (100). The sensor unit as described above may be applied in various forms such as an image sensor method or a photo sensor method.

In detail, the sensor unit according to the present embodiment includes an infrared filter 210 for selectively transmitting only infrared light from incident light, a lens assembly 220 collecting light passing through the infrared filter 210, and the lens assembly 220. It is configured to include an image sensor 230 for converting the light passing through) into an image image.

The infrared filter 210 is installed at the front end of the sensor unit to block visible light and transmit infrared light to the lens assembly 220. Visible light in an unnecessary surrounding environment enters the camera 30 to the touch signal. It serves to prevent crosstalk. In addition, the infrared filter 210 also covers and protects the lens assembly 220 at the tip of the camera.

The lens assembly 220 includes a plurality of lenses 222 and has a viewing angle of 90 degrees or more and images infrared rays from the input module 100 on the image sensor 230. The image sensor 230 may be a CCD or a CMOS linear imager that is configured to convert light reaching through the lens assembly 220 into a digital signal.

Finally, the light reaching the image sensor 230 recognizes all the objects coming on the screen S as a single line by the linear image sensor, and when there is no touch point on the screen S, the lens assembly ( While detecting that there is no light input through the 220, when the infrared light is emitted from the input module 100, the point where the input module 100 is located as the brightest point is recognized as a touch point.

In this embodiment, the sensor unit detects the integrated position detection and the blinking cycle detection of the light emitted from the input module 100 integrally, but the relative position of the light is detected by the above-described image sensor In addition, it is also possible to include an infrared light receiving unit on the outside of the separate housing and configured to separately detect the flashing cycle of light.

Next, a process of detecting a touch point on the screen S will be described with reference to FIG. 8.

As shown in Figure 8, in the form of a pair of sensor units provided on the corner of the screen (S), the position of the sensor unit provided on the upper right is set to the reference coordinate (0, 0), If the horizontal length of the screen 10 is set to l _x and the vertical length of the screen 10 to l _y , the coordinates (x, y) on the screen of the point touched by the user's finger, touch pen, etc. Recognized by Equation 1 by two sensor units.

Through Equation 1, the detection unit detects the coordinates of the touch point as shown in Equation 2 below.

Through the above Equations 1 and 2, the detection unit calculates the position of the user's touch point recognized through the sensor unit.

Referring to FIG. 9, a process of generating an attribute of a path based on the detected path and pressure value of the touch point is as follows.

FIG. 9A illustrates a position (x, y) of a touch point according to time through the above-described process through FIG. 8. And (b) of FIG. 9 shows the pressure value according to the time detected by the detection unit by changing the property of the light by the pressure sensor 130.

When the position of the touch point and the pressure value information are combined as described above, the thickness according to the pressure may be reflected on the path based on the touch point as shown in FIG. 9C. That is, as the movement path of the point where the user touches is displayed, the pressure of the corresponding point increases, so that the thickness of the path P of the corresponding point becomes thicker.

Of course, the attribute specified as the data measured by the pressure sensor 130, 130 is described as an example of the thickness of the path. Alternatively, however, it is also possible to change the concentration in response to the pressure value. In other words, when the pressure value is low, the path may be expressed lightly, and when the pressure value is high, the path may be expressed deeply.

The touch input device provided with the pressure sensors 130 and 130 as described above may be applied as a touch pad integrally provided on a keyboard of a personal computer, or may be provided as an operation panel such as a cash machine or a bank.

In addition, in recent years, a tablet or the like for drawing on a computer is used without using paper, which may be applied to such a tablet, and an LCD display is provided under the touch panel so that a path input to the touch panel is lower. It may be made to be represented on the LCD display of the projection.

As described above, the preferred embodiments of the present invention have been described, and the fact that the present invention can be embodied in other specific forms without departing from the spirit or scope of the present invention can be embodied by those skilled in the art. It is self-evident to. Therefore, the above-described embodiments should be regarded as illustrative rather than restrictive, and thus, the present invention is not limited to the above description and may be modified within the scope of the appended claims and their equivalents.

100: input module 110: main body
120: light emitting unit 130: pressure sensor
140: attribute control unit 150: built-in battery
190: external control unit 200: recognition module
210: infrared filter 220: lens assembly
230: image sensor S: screen

Claims (11)

In the screen input device for recognizing the touch point on the flat screen,
The light emitting unit emits light in the horizontal direction by applying power, a pressure sensor for detecting the pressure pressed by the light emitting unit and the property of the light emitted from the light emitting unit based on the pressure sensed by the pressure sensor An input module including an attribute control unit; And
At least two or more edges of the screen are detected, and a touch point on the screen is detected by the sensor unit for detecting light emitted from the light emitting unit and the relative position of the light detected by the sensor unit. Recognition module including a detection unit for detecting a pressure value for pressing the screen;
Screen input device configured to include. The method of claim 1,
The attribute control unit controls at least one attribute of a blinking period, an intensity, and a wavelength of light emitted from the light emitting unit;
And the detecting unit detects a pressure corresponding to an attribute of light controlled by the attribute controller. The method of claim 1,
The input module,
And an external manipulation unit configured to manipulate attribute values toward the attribute control unit by external manipulation of a user. The method of claim 1,
The light-
An infrared light emitting device for emitting infrared light; And
Light transmitting member of the transparent material for transmitting the light emitted from the infrared light emitting device to the front;
Screen input device comprising a. The method of claim 4, wherein
The light transmitting member,
It is provided to be movable along its longitudinal direction, the screen input device, characterized in that for transmitting the pressure at the end to the pressure sensor side. The method of claim 5,
The light-
And a reflecting member provided at an end of the light transmitting member to transmit the light transmitted from the light transmitting member in a lateral direction. The method of claim 1,
The screen is a rectangular flat plate;
And the sensor unit is provided on at least two of four corners of the screen. The method of claim 1,
The sensor unit,
An infrared filter for selectively transmitting only infrared light from the incident light;
A lens assembly collecting light that passes through the infrared filter; And
An image sensor for converting light passing through the lens assembly into an image image;
Screen input device comprising a. The method of claim 1,
The detection unit,
And generating a path based on the detected touch point and generating a thickness or concentration attribute of a corresponding point of the path based on the detected pressure value. In the screen input device for recognizing the touch point on the flat screen,
A light emitting unit which emits light in a horizontal direction by receiving power;
A pressure sensor for sensing the pressure pressed by the light emitting unit by the screen; And
A property control unit controlling a property of light emitted from the light emitting unit based on the pressure sensed by the pressure sensor,
At least two or more edges of the screen are detected, and a touch point on the screen is detected by the sensor unit for detecting light emitted from the light emitting unit and the relative position of the light detected by the sensor unit. An input module for a screen input device recognized by a recognition module including a detection unit for detecting a pressure value for pressing a screen. In the screen input device for recognizing the touch point on the flat screen,
The light emitting unit emits light in the horizontal direction by applying power, a pressure sensor for detecting the pressure pressed by the light emitting unit and the property of the light emitted from the light emitting unit based on the pressure sensed by the pressure sensor A recognition module for recognizing an input of an input module including an attribute control unit,
At least two sensor units provided at edges of the screen and configured to sense light emitted from the light emitting unit; And
A detection unit for detecting a touch point on the screen by a relative position of light detected by the sensor unit and a pressure value for pressing the screen by an attribute of the light;
Recognition module for a screen input device comprising a.

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