System and method for preventing AR glasses from burn-in

Abstract

The invention discloses a hyson method for preventing AR (Augmented Reality) glasses from burn-in, a telescopic high-precision camera is additionally arranged in front of a silicon-based OLED (Organic Light Emitting Diode) display screen of the AR glasses, when the AR glasses are turned on each time, the camera is controlled by a connecting rod to extend to the front of the display screen, the display screen sequentially displays red / green / blue (R / G / B) monochromatic pictures, the camera collects optical data of the whole surface of the screen and feeds back the optical data to a chip, and the chip is used for displaying the monochromatic pictures of the whole surface of the screen. After acquisition, the camera is controlled by the connecting rod to return, and normal display is not affected. And the chip identifies the brightness attenuation of the burn-in position of the screen according to the optical data fed back by the camera, and performs compensation during subsequent display.

Description

Technical Field

[0001] The present invention relates to the field of AR glasses technology, and in particular to the technical field of solving the problem of Micro OLED screen burn-in in AR glasses. Background Art

[0002] The displays of AR glasses include Micro OLED, Micro LED, LCOS, LBS, etc. Among them, the lifespan of silicon-based OLED display is shorter than other types of screens due to material properties. When the screen displays the same bright image for a long time or pixels in the same area continue to emit light, these pixels may age faster due to excessive use, resulting in reduced brightness or chromaticity shift, and screen burn-in.

[0003] There are two methods to solve or delay OLED screen burn-in. One is pixel shift, which is to move the displayed image up, down, left, and right by a certain number of pixels at regular intervals during the display process to ensure that the highlighted pattern is not continuously displayed in the same position. The other is to record the usage time of each pixel and compensate in real time.

[0004] For example, the publication number is CN114765017B, the publication date is November 22, 2024, and the patent name is "Pixel Degradation Tracking and Compensation for Display Technology". The disclosed tracking and compensation method tracks the aging of the pixel units of the display (for example, R, G, B and / or W pixel units) so that the pixel units with more aging can be compensated by reducing the pixel value of one or more (for example, each) other pixel units of the display, that is, by tracking the brightness degradation over time and compensating for the brightness degradation on some or all pixel units of the display, the effects of burn-in or ghosting can be reduced.

[0005] However, similar methods can only slow down the screen burn-in phenomenon or cause a heavy load on the chip, and the compensation cannot be accurate. Summary of the invention

[0006] The present invention aims to realize a technology that can simply and efficiently solve the problem of silicon-based OLED screen burn-in in AR glasses.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a system for preventing AR glasses from screen burn-in, the AR glasses include a glasses frame, glasses legs and lenses in the glasses frame, the glasses legs are provided with a display screen for projecting images onto the lenses, and a camera is provided in front of the display screen for collecting optical data when the display screen is turned on, and the camera is connected to and outputs the collected signal to the control chip of the AR glasses.

[0008] A laterally protruding cavity for storing a camera is provided on the temple, and a telescopic connecting rod is provided in the cavity. When the AR glasses are calibrated, the connecting rod is extended to place the camera in front of the display screen, and when the AR glasses are not calibrated, the connecting rod is retracted to store the camera in the cavity.

[0009] The camera, cavity and connecting rod in the temple are symmetrically arranged.

[0010] The display screen is an OLED screen.

[0011] A method for preventing AR glasses from screen burn-in, characterized in that:

[0012] When calibrating, the display screen displays a monochrome picture, and the camera captures each monochrome picture. The control chip obtains the attenuation areas of different colors of the display screen and the attenuation state of each attenuation area based on the monochrome picture, and obtains the compensation voltage of the corresponding color based on the attenuation state of different colors. When the display screen works normally, the different color compensation voltages of each attenuation area obtained by executing this calibration are used.

[0013] The display screen shows monochrome images as red, green and blue monochrome pictures;

[0014] When the control chip recognizes a red picture, it recognizes the red brightness attenuation area of ​​the screen burn-in position, obtains the compensation voltage of the red brightness attenuation area according to the attenuation brightness value, and when the display screen is working normally, the red brightness attenuation area displays red according to the compensated voltage;

[0015] When the control chip recognizes a green picture, it recognizes the green brightness attenuation area of ​​the screen burn-in position, obtains the compensation voltage of the green brightness attenuation area according to the attenuation brightness value, and when the display screen is working normally, the green brightness attenuation area displays green according to the compensated voltage;

[0016] When the control chip recognizes a blue picture, it recognizes the blue brightness attenuation area at the screen burn-in position, and obtains the compensation voltage of the blue brightness attenuation area according to the attenuated brightness value. When the display screen is working normally, the blue brightness attenuation area displays blue and is executed according to the compensated voltage.

[0017] When the camera is in a calibration state, the control link extends the camera and uses the camera to take pictures. When the calibration state is completed, the control link retracts the camera.

[0018] The AR glasses enter a calibration state every time they are turned on.

[0019] The present invention can add a retractable high-precision camera in front of the silicon-based OLED display screen of AR glasses. Each time the AR glasses are turned on, the camera is controlled by a connecting rod to extend in front of the display screen. The display screen displays red / green / blue (R / G / B) monochrome pictures in sequence. The camera collects optical data of the entire screen and feeds it back to the chip. After the collection is completed, the camera is controlled by the connecting rod to return without affecting the normal display. The chip recognizes the brightness attenuation of the screen burn-in position based on the optical data fed back by the camera, and compensates for it in subsequent displays. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following is a brief description of the contents expressed in each figure in the specification of the present invention and the marks in the figure:

[0021] Figure 1 This is the schematic diagram of the device when the camera is in the initial position;

[0022] Figure 2 This is a schematic diagram of the device in the calibration position of the camera;

[0023] Figure 3 This is the Gamma compensation value chart;

[0024] Figure 4 This is a schematic diagram of the brightness of a certain R / G / B pixel in an R / G / B monochrome image decaying to 97% / 98% / 99% respectively; the marks in the above figure are: 1. glasses leg; 2. camera; 3. connecting rod; 4. display screen. DETAILED DESCRIPTION

[0025] The following is a further detailed description of the specific implementation methods of the present invention, such as the shape, structure, relative position and connection relationship between the various components involved, the function and working principle of each part, the manufacturing process and operation method, etc., through the description of the embodiments with reference to the accompanying drawings, so as to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention.

[0026] The present invention is an improvement on the existing AR glasses. The current AR glasses display output device is located on the display screen 4 inside the two glasses legs 1. The display screen 4 projects the image onto the lens for display. The display screen 4 is generally an OLED screen, such as Figure 1 As shown, the AR glasses include a glasses frame, glasses legs 1 and lenses in the glasses frame, and display screens 4 are symmetrically arranged in the two glasses legs. The present invention uses two cameras 2 to independently collect images of the two display screens 4 to directly obtain supplementary information. Therefore, the camera 2 is located in front of the display screen 4 when working, that is, located in the glasses legs 1 between the display screen 4 and the glasses frame.

[0027] The camera 2 collects optical data when the display screen 4 is turned on. Both cameras 2 are connected to the control chip of the AR glasses and transmit the collected image information to the control chip. The control chip is the chip of the existing AR glasses. Because the camera 2 will block the projection of the display screen 4 onto the lens when it is working, it is necessary to have an area to store the camera 2 in the non-detection state so as not to interfere with the projection and affect the projection effect. Therefore, a laterally protruding cavity for storing the camera 2 is provided on the two temples, and the protruding direction of the cavity is toward the upper, lower or outer side of the temple.

[0028] A telescopic connecting rod 3 is provided in the cavity, and the camera 2 is controlled to be telescopic by the connecting rod 3. When extended, it is in a calibrated position and is located directly in front of the display screen 4; when retracted, it is in an initial position. The camera 2 and the connecting rod 3 are all stored in the cavity and will not block the light from the display screen 4. The camera 2 is preferably a high-precision camera 2. The connecting rod 3 with a telescopic function can adopt any existing telescopic structure that can be electrically controlled, such as driving a threaded rod to extend and retract through an electric cylinder, etc., as long as the telescopic function can be achieved, the camera 2, the cavity and the connecting rod 3 in the temple are symmetrically arranged.

[0029] Camera 2 is connected to and outputs the collected signal to the control chip of the AR glasses, and the control chip has compensation data pre-stored in it, such as Figure 3 As shown in the figure, by testing the life data of the RGB monochrome screen of the Micro OLED screen, the Gamma compensation voltage is obtained. Table 1 shows the value of the Gamma voltage that needs to be compensated when RGB decays to different percentages. For example, when the brightness of a G pixel decays to 98%, after the Gamma voltage is compensated, the G pixel can restore 100% brightness. This table data is stored in the chip for subsequent compensation.

[0030] The method to prevent AR glasses from burning in is that when calibration is performed, the display screen 4 displays a monochrome picture, and the camera 2 captures each monochrome picture. The control chip obtains attenuation areas of different colors of the display screen 4 and the attenuation state of each attenuation area according to the monochrome picture, and obtains the compensation voltage of the corresponding color by looking up the table according to the attenuation state of different colors. When the display screen 4 works normally, the different color compensation voltages of each attenuation area obtained by executing this calibration are used.

[0031] Specifically, the AR glasses are calibrated every time they are turned on. When the glasses are turned on, the camera 2 is controlled by the connecting rod 3 to extend to the calibration position. Because the screen is a RGB three-color display, the display screen 4 displays a monochrome picture of red, green, and blue; the display screen 4 displays red / green / blue (R / G / B) monochrome pictures in sequence, and the camera 2 collects the optical data of the entire screen and feeds it back to the chip. After the collection is completed, the camera 2 is controlled by the connecting rod 3 to return to the initial position. The chip recognizes the brightness attenuation of the screen burn-in position based on the R / G / B pictures taken by the camera 2, and compensates for RGB separately according to the Gamma compensation table data, thus eliminating the burn-in problem when the screen is displayed normally.

[0032] like Figure 4 As shown, if it is recognized that the brightness of a certain R / G / B pixel of the R / G / B monochrome screen is attenuated to 97% / 98% / 99% respectively, then according to the Gamma compensation table, the Gamma voltage compensation values ​​of these three pixels are g / e / c respectively, which can eliminate the burn-in problem.

[0033] When the control chip recognizes a red picture, it recognizes the red brightness attenuation area of ​​the screen burn-in position, obtains the compensation voltage of the red brightness attenuation area according to the attenuation brightness value, and when the display screen 4 works normally, the red brightness attenuation area displays red according to the compensated voltage;

[0034] When the control chip identifies a green picture, it identifies the green brightness attenuation area of ​​the screen burn-in position, obtains the compensation voltage of the green brightness attenuation area according to the attenuation brightness value, and when the display screen 4 works normally, the green brightness attenuation area displays green according to the compensated voltage;

[0035] The control chip recognizes the blue brightness attenuation area at the screen burn-in position when recognizing a blue picture, and obtains a compensation voltage of the blue brightness attenuation area according to the attenuated brightness value. When the display screen 4 works normally, the blue brightness attenuation area displays blue and is executed according to the compensated voltage.

[0036] When the camera 2 is in a calibration state, the control link 3 extends the camera 2 and uses the camera 2 to take pictures. When the calibration state is completed, the control link 3 retracts the camera 2.

[0037] This patent uses a high-precision camera 2 in AR glasses to actually measure the optical data of the display screen 4 to perform compensation. This method is relatively simple and accurate.

[0038] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A system for preventing screen burn-in of AR glasses, the AR glasses comprising a glasses frame, glasses legs and lenses in the glasses frame, wherein the glasses legs are provided with a display screen for projecting an image onto the lenses, characterized in that: A camera for collecting optical data when the display screen is turned on is provided in front of the display screen, and the camera is connected to and outputs the collected signal to the control chip of the AR glasses.

2. The system for preventing screen burn-in of AR glasses according to claim 1, characterized in that: A laterally protruding cavity for storing a camera is provided on the temple, and a telescopic connecting rod is provided in the cavity. When the AR glasses are calibrated, the connecting rod is extended to place the camera in front of the display screen, and when the AR glasses are not calibrated, the connecting rod is retracted to store the camera in the cavity.

3. The system for preventing screen burn-in of AR glasses according to claim 2, characterized in that: The camera, cavity and connecting rod in the temple are symmetrically arranged.

4. The system for preventing screen burn-in of AR glasses according to claim 1, 2 or 3, characterized in that: The display screen is an OLED screen.

5. A method for preventing screen burn-in of AR glasses, characterized in that: When calibrating, the display screen displays a monochrome picture, and the camera captures each monochrome picture. The control chip obtains the attenuation areas of different colors of the display screen and the attenuation state of each attenuation area based on the monochrome picture, and obtains the compensation voltage of the corresponding color based on the attenuation state of different colors. When the display screen works normally, the compensation voltage of each color attenuation area obtained by executing this calibration is used.

6. The method for preventing screen burn-in of AR glasses according to claim 5, characterized in that: The display screen shows monochrome images as red, green and blue monochrome pictures.

7. The method for preventing screen burn-in of AR glasses according to claim 6, characterized in that: When the control chip recognizes a red picture, it recognizes the red brightness attenuation area of ​​the screen burn-in position, obtains the compensation voltage of the red brightness attenuation area according to the attenuation brightness value, and when the display screen is working normally, the red brightness attenuation area displays red according to the compensated voltage; When the control chip recognizes a green picture, it recognizes the green brightness attenuation area of ​​the screen burn-in position, obtains the compensation voltage of the green brightness attenuation area according to the attenuation brightness value, and when the display screen is working normally, the green brightness attenuation area displays green according to the compensated voltage; When the control chip recognizes a blue picture, it recognizes the blue brightness attenuation area at the screen burn-in position, obtains the compensation voltage of the blue brightness attenuation area according to the attenuated brightness value, and when the display screen is working normally, the blue brightness attenuation area displays blue and is executed according to the compensated voltage.

8. The method for preventing screen burn-in of AR glasses according to claim 5, 6 or 7, characterized in that: When the camera is in a calibration state, the control link extends the camera and uses the camera to take pictures. When the calibration state is completed, the control link retracts the camera.

9. The method for preventing screen burn-in of AR glasses according to claim 8, characterized in that: The AR glasses enter a calibration state every time they are turned on.

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