Backlight calibration system for CMS display screen

Abstract

The utility model discloses a CMS display screen backlight calibration system which comprises a calibration box and an upper computer, an adjustable light source, a luminance meter and a display screen are installed in the calibration box, a photosensitive sensor is installed on the display screen, and the luminance meter is correspondingly installed on the front face of the display screen. The ambient brightness value is received by the photosensitive sensor, the brightness meter monitors the actual brightness of the display screen in real time, and the upper computer adjusts the backlight brightness of the display screen to the backlight brightness value given by the display screen manufacturer through the screen controller according to the actual ambient brightness value and the display screen backlight brightness value given by the display screen manufacturer. The light source controller controls and adjusts the illumination intensity of the light emitted by the adjustable light source to an actual brightness value given by a manufacturer, and the ambient brightness value received by the photosensitive sensor corresponding to the backlight brightness of the display screen is calibrated, so that the problem that the relative values of the illumination intensity acquired by different photosensitive devices are different is solved, the calibration precision is higher, and the calibration efficiency is improved. And the use feeling and the driving safety of the display screen of the electronic rearview mirror are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile electronic rearview mirrors, in particular to a CMS display screen backlight positioning system. Background Art

[0002] With the introduction of regulations on electronic exterior rearview mirrors, more and more cars are installing CMS electronic rearview mirrors to replace traditional physical rearview mirrors. In rain, fog or strong light, electronic rearview mirrors are more advantageous than physical rearview mirrors.

[0003] With the popularity of electronic rearview mirrors, users have higher and higher requirements for the display effect of rearview mirror images. Under different light intensities, the human eye has different requirements for the brightness of the display screen. When the ambient light in the car is strong, the image brightness of the electronic rearview mirror display screen needs to be brighter, otherwise the field of view image will be unclear; at night, in tunnels or garages with weak light, the brightness of the display screen needs to be dim, otherwise it will be dazzling and make the driver uncomfortable.

[0004] Many CMS electronic rearview mirrors are now equipped with photosensitive devices on their display screens, which automatically adjust the backlight brightness of the display screen by sensing the light intensity in the car. However, display screen manufacturers usually only provide a set of values ​​for the actual ambient light intensity and the backlight brightness. For different photosensitive devices, the relative values ​​of the collected light intensity are different. Under different light intensities, the backlight should be adjusted to the corresponding brightness, which requires calibration. Therefore, a system that can calibrate the backlight brightness of the display screen can not only improve the accuracy of calibration, but also improve the user experience and driving safety. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a CMS display screen backlight calibration system for achieving the purpose of improving the calibration accuracy of the CMS display screen and improving the user experience and driving safety of the electronic rearview mirror display screen.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0007] A CMS display screen backlight calibration system, comprising a calibration box and a host computer, wherein an adjustable light source, a brightness meter and a display screen are respectively installed inside the calibration box, a photosensitive sensor is installed on the display screen, and the brightness meter is correspondingly installed on the front of the display screen;

[0008] The adjustable light source is connected to the light source controller by signal, the display screen and the photosensor are both connected to the screen controller by signal, and the light source controller, the brightness meter and the screen controller are all connected to the host computer by signal.

[0009] Preferably, the adjustable light source is a stepless dimming lamp.

[0010] Preferably, the display screen is an LCD screen.

[0011] Preferably, the calibration box is a sealed light-proof box.

[0012] Preferably, the luminance meter is arranged directly opposite to the display screen.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model simulates the interior space of the whole vehicle through a calibration box, and the upper computer controls and adjusts the adjustable light source to emit light of different light intensities through a light source controller, changes the ambient brightness value in the calibration box, and the ambient brightness value is received by the photosensitive sensor and fed back to the upper computer through the screen controller. The brightness meter monitors the actual brightness of the display screen in real time, and feeds back the actual brightness value of the display screen to the upper computer. According to the actual ambient brightness value and the backlight brightness value of the display screen given by the display screen manufacturer, the upper computer adjusts the backlight brightness of the display screen to the backlight brightness value given by the display screen manufacturer through the screen controller, and controls and adjusts the light intensity of the light emitted by the adjustable light source through the light source controller. The actual brightness value given by the manufacturer is calibrated, and the ambient brightness value received by the photosensor corresponding to the backlight brightness of the display is calibrated to solve the problem that different photosensors collect different relative values ​​of light intensity. Each input brightness value of the adjustable light source intensity corresponds to an ambient brightness value received by the photosensor. By increasing or decreasing the calibrated relative value, the backlight value required by the display can be obtained to meet the purpose of the best comfort experience for the human eye, complete the closed-loop adjustment, and have higher calibration accuracy. It greatly saves the calibration time of the display backlight value in the real vehicle environment and improves the user experience and driving safety of the electronic rearview mirror display. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is the control principle diagram of the utility model.

[0017] In the figure: 1. Calibration box; 2. Host computer; 3. Adjustable light source; 4. Brightness meter; 5. Display screen; 6. Photosensor; 7. Light source controller; 8. Screen controller. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] like Figure 1-2 As shown, the utility model provides a technical solution: a CMS display screen backlight calibration system, including a calibration box 1 and a host computer 2, the calibration box 1 is a sealed light-proof box, the calibration box 1 is respectively installed with an adjustable light source 3, a brightness meter 4 and a display screen 5, the adjustable light source 3 is a stepless dimming lamp, the display screen 5 is an LCD screen, a photosensitive sensor 6 is installed on the display screen 5, and the brightness meter 4 is installed on the front of the display screen 5 and is arranged facing the display screen 5;

[0020] The adjustable light source 3 is connected to the light source controller 7 by signal, the display screen 5 and the photosensor 6 are connected to the screen controller 8 by signal, and the light source controller 7 , the brightness meter 4 and the screen controller 8 are connected to the host computer 2 by signal.

[0021] Working principle: The calibration box 1 simulates the interior space of the vehicle, and the upper computer 2 controls and adjusts the adjustable light source 3 to emit light of different light intensities through the light source controller 7, changing the ambient brightness value in the calibration box 1. The ambient brightness value is received by the photosensitive sensor 6 and fed back to the upper computer 2 through the screen controller 8. The brightness meter 4 monitors the actual brightness of the display screen 5 in real time and feeds back the actual brightness value of the display screen 5 to the upper computer 2. According to the actual ambient brightness value and the backlight brightness value of the display screen 5 given by the manufacturer of the display screen 5, the upper computer 2 adjusts the backlight brightness of the display screen 5 to the backlight brightness value given by the manufacturer of the display screen 5 through the screen controller 8, and controls the light source. The device 7 controls and adjusts the illumination intensity of the light emitted by the adjustable light source 3 to the actual brightness value given by the manufacturer, and calibrates the ambient brightness value received by the photosensor 6 corresponding to the backlight brightness of the display screen 5, so as to solve the problem that different photosensors collect different relative values ​​of illumination intensity. Each brightness value of the illumination intensity of the adjustable light source 3 input corresponds to an ambient brightness value received by the photosensor 6. By increasing or decreasing the calibrated relative value, the backlight value required by the display screen 5 can be obtained to meet the purpose of the best comfort experience for the human eye, and the closed-loop adjustment is completed with higher calibration accuracy, which greatly saves the calibration time of the backlight value of the display screen 5 in the real vehicle environment.

[0022] It should be noted that, in this article, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A CMS display screen backlight positioning system, characterized in that: It comprises a calibration box (1) and a host computer (2), wherein an adjustable light source (3), a brightness meter (4) and a display screen (5) are respectively installed inside the calibration box (1), a light-sensitive sensor (6) is installed on the display screen (5), and the brightness meter (4) is installed on the front side of the display screen (5); The adjustable light source (3) is signal-connected to a light source controller (7), the display screen (5) and the light-sensitive sensor (6) are both signal-connected to a screen controller (8), and the light source controller (7), the brightness meter (4) and the screen controller (8) are all signal-connected to a host computer (2).

2. A CMS display screen backlight positioning system according to claim 1, characterized in that: The adjustable light source (3) is a stepless dimming lamp.

3. A CMS display screen backlight positioning system according to claim 1, characterized in that: The display screen (5) is an LCD screen.

4. A CMS display screen backlight positioning system according to claim 1, characterized in that: The calibration box (1) is a sealed, light-proof box.

5. A CMS display screen backlight positioning system according to claim 1, characterized in that: The brightness meter (4) is arranged facing the display screen (5).

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