CN204577063U - Based on the all-in-one of surround lighting dynamic adjustments liquid crystal display backlight illumination - Google Patents

Abstract

The utility model relates to an all-in-one machine for dynamically adjusting the backlight brightness of an LCD screen based on ambient light, comprising a display screen, a TV main board, a computer main board, a light sensor, a main control chip, a backlight drive module and a power supply module; the VGA output interface of the computer main board and the The VGA input interface of the TV module is electrically connected, and the TV main board is electrically connected to the display; the backlight driver module is electrically connected to the display to adjust the backlight brightness of the display; the light sensor and the backlight driver module are electrically connected to the main control chip , the light sensor is used to detect the change of ambient light to generate a change signal, and transmit the change signal to the main control chip to control the working state of the backlight drive module; the power supply module is used for the display screen, TV main board, computer main board, light sensor, Power supply for main control chip and backlight driver module. The all-in-one machine of the utility model has high sensitivity, can automatically adjust the backlight brightness of the liquid crystal screen, and effectively protects users' eyes.

Description

All-in-one machine that dynamically adjusts LCD backlight brightness based on ambient light

technical field

The utility model relates to the field of multimedia equipment, in particular to an all-in-one machine for dynamically adjusting the brightness of a liquid crystal screen backlight based on ambient light.

Background technique

Liquid crystal screen can also be called liquid crystal display screen. It has low energy consumption, light weight, small size, simple driving circuit and low cost. It is widely used in various industrial electronics fields, and it can be used as a screen for various devices. Especially when it is a touch display screen, various required functions can be directly selected by touch, which is not only intuitive but also convenient.

At present, the screen brightness of the LCD screen is usually a fixed value. No matter what environment the user watches and uses, the screen brightness always maintains a certain brightness, and it cannot be automatically adjusted according to the actual ambient light. It can only be adjusted manually. Adjust the brightness of the screen, which caused a certain inconvenience. Especially when the liquid crystal display screen is fixed at a high brightness, it will cause greater damage to the human eye, and the human eye will easily cause eye fatigue and even greater damage if the human eye is facing the high brightness display screen for a long time.

Utility model content

Aiming at the deficiencies of the prior art, the purpose of this utility model is to provide an all-in-one machine that can automatically adjust the brightness of the backlight of the display screen and has high response sensitivity, and can dynamically adjust the brightness of the liquid screen backlight based on ambient light.

In order to achieve the above object, the utility model adopts the following technical solutions:

An all-in-one machine that dynamically adjusts the brightness of a liquid screen backlight based on ambient light, including a display screen, a TV main board, a computer main board, a light sensor, a main control chip, a backlight drive module, and a power supply module; the VGA output interface or HDMI output of the computer main board The interfaces are respectively electrically connected to the VGA input interface or the HDMI input interface of the TV module, and the TV main board is electrically connected to the display screen; the backlight drive module is electrically connected to the display screen to adjust the backlight brightness of the display screen; the light Both the sensor and the backlight drive module are electrically connected to the main control chip, and the light sensor is used to detect changes in ambient light to generate a change signal, and transmit the change signal to the main control chip to control the working state of the backlight drive module; the power supply module Used to supply power for display screens, TV main boards, computer main boards, light sensors, main control chips and backlight drive modules.

Preferably, the computer motherboard is also provided with a USB interface and a SATA interface, the USB interface is used to connect the wireless network card and the camera, and the SATA interface is used to connect the computer hard disk.

Preferably, the main control chip triggers the backlight driving module through a pulse width modulation signal or a voltage regulation signal.

Preferably, the pulse width modulation signal is used to turn off or turn on part of the light sources in the display backlight.

The beneficial effects of the utility model are as follows: the all-in-one machine that dynamically adjusts the brightness of the backlight of the LCD screen based on ambient light has fast response and high sensitivity, and can automatically adjust the brightness of the backlight of the LCD screen according to the brightness of the surrounding ambient light, effectively protecting the eyes of the user. Energy saving. Simultaneously, the utility model integrates the TV and the computer, and can also realize the function of surfing the Internet while watching the TV while automatically adjusting the brightness of the display screen backlight.

Description of drawings

FIG. 1 is a structural schematic diagram of a preferred embodiment of an all-in-one machine for dynamically adjusting the brightness of a liquid crystal screen backlight based on ambient light of the present invention.

FIG. 2 is a circuit diagram of a backlight drive module in an all-in-one machine for dynamically adjusting the brightness of a liquid crystal screen backlight based on ambient light of the present invention.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described:

Please refer to Fig. 1, the utility model relates to an all-in-one machine for dynamically adjusting the brightness of the liquid screen backlight based on ambient light, including a display screen, a TV main board, a computer main board, a light sensor, a main control chip, a backlight drive module and a power supply module; a computer main board The VGA output interface or HDMI output interface of the TV module is electrically connected with the VGA input interface or HDMI input interface of the TV module, and the TV main board is electrically connected with the display screen; the backlight driver module is electrically connected with the display screen to adjust the backlight brightness of the display screen; Both the light sensor and the backlight drive module are electrically connected to the main control chip. The light sensor is used to detect the change of ambient light to generate a change signal, and transmit the change signal to the main control chip to control the working state of the backlight drive module; It is used to supply power for display screens, TV main boards, computer main boards, light sensors, main control chips and backlight drive modules.

Its specific working principle is that the light sensor is used to detect the brightness of the surrounding ambient light, and generates a corresponding electrical signal through the change of the ambient light, and sends the electrical signal to the main control chip. The backlight driver module is controlled to work, and the backlight driver module controls the backlight brightness of the display screen accordingly and adapts the brightness of the display screen to the ambient light, so as to realize the automatic adjustment of the brightness of the display screen in the all-in-one machine, thereby protecting human eyes. The light sensor is a device that is sensitive to changes in ambient light and can respond to changes in ambient light in a timely manner.

At the same time, the display screen of the all-in-one machine is connected with a TV main board and a computer main board, which can realize the functions of watching TV and surfing the Internet at the same time. Wherein the computer motherboard is also provided with a USB interface and a SATA interface, the USB interface is used for connecting the wireless network card and the camera, and the SATA interface is used for connecting the computer hard disk.

Preferably, the main control chip triggers the backlight driving module through a pulse width modulation signal (PWM) or a voltage regulation signal. A pulse width modulated signal is used to turn off or turn on some of the light sources in the display backlight. Wherein the light source may be a light emitting diode LED.

Specifically, in FIG. 2 , the main control chip may output a modulation pulse, and at this time, the capacitor C1 starts charging and discharging. When the capacitor C1 is charged, the base of the NPN transistor Q1 is at a high level. At this time, Q11 is turned on, and the level of the LED cathode is pulled down. At this time, the LED emits light. Correspondingly, when the discharge of C1 ends, the base of NPN transistor Q1 is at a low level, at this time Q1 is closed, and the level of the cathode of the LED is pulled high, at this time, the LED is turned off. In this embodiment, the control of the backlight of the touch screen can be realized by controlling the extinguishing or lighting of the LED.

For those skilled in the art, various other corresponding changes and modifications can be made according to the technical solutions and ideas described above, and all these changes and modifications should fall within the protection scope of the claims of the present invention .

Claims (4)

1. based on an all-in-one for surround lighting dynamic adjustments liquid crystal display backlight illumination, it is characterized in that: comprise display screen, TV motherboard, computer main board, light sensor, main control chip, backlight drive module and supply module; The VGA output interface of described computer main board or HDMI output interface are electrical connected with the VGA input interface of television module or HDMI input interface respectively, and described TV motherboard and display screen are electrical connected; Described backlight drive module and display screen are electrical connected the backlight illumination regulating display screen; Described light sensor and backlight drive module are all electrical connected with main control chip, and described light sensor is used for the change of ambient light with the signal that changes, and variable signal is transferred to main control chip to control the duty of backlight drive module; Supply module is used for for display screen, TV motherboard, computer main board, light sensor, main control chip and backlight drive module for power supply.

2. as claimed in claim 1 based on the all-in-one of surround lighting dynamic adjustments liquid crystal display backlight illumination, it is characterized in that: described computer main board is also provided with USB interface and SATA interface, described USB interface is for connecting wireless network card and camera, and described SATA interface is for connecting computer hard disc.

3., as claimed in claim 1 based on the all-in-one of surround lighting dynamic adjustments liquid crystal display backlight illumination, it is characterized in that: described main control chip triggers described backlight drive module by pulse width modulating signal or regulated voltage signal.

4., as claimed in claim 3 based on the all-in-one of surround lighting dynamic adjustments liquid crystal display backlight illumination, it is characterized in that: described pulse width modulating signal is for extinguishing or lighting the part light source in described display backlight.