Method for detecting luminance uniformity of screen, storage medium, and electronic device

Patent metadata

Field	Value
Publication number	US-2020175902-A1
Application number	US-201916699748-A
Country	US
Kind code	A1
Filing date	Dec 2, 2019
Priority date	Nov 30, 2018
Publication date	Jun 4, 2020
Grant date	—

Abstract

A method for detecting luminance uniformity of a screen, storage medium, and electronic device are provided. The method includes the following steps. At least one pixel on a display panel of a screen is lit. Light intensity of the pixel reflected by a non-opaque cover plate is acquired by a photoelectric sensor of the screen. Whether the pixel is uniformly luminous based on the acquired light intensity is determined. In this solution, by adding a photoelectric sensor to the screen, it is convenient to obtain the light condition of the screen, and then it is convenient to obtain whether the pixel is uniformly luminous.

First claim

What is claimed is:

1 . A method for detecting luminance uniformity of a screen, comprising:
lighting at least one pixel on a display panel of a screen; acquiring, by a photoelectric sensor, intensity of light emitted from the at least one pixel that is reflected by a non-opaque cover plate; and determining whether the at least one pixel is uniformly luminous based on the acquired light intensity.

2 . The method for detecting luminance uniformity of a screen according to claim 1 , characterized in that, determining whether the pixel is uniformly luminous based on the acquired light intensity comprises:
determining whether a difference between the acquired light intensity and a pre-stored light intensity is within a reasonable range; if the difference is within the reasonable range, determining the at least one pixel corresponding to the acquired light intensity is uniformly luminous; otherwise determining the at least one pixel corresponding to the light intensity is not uniformly luminous.

3 . The method for detecting luminance uniformity of a screen according to claim 1 , characterized in that, determining whether the pixel is uniformly luminous based on the acquired light intensity comprises:
determining whether a difference between the acquired light intensity of the at least one pixel and a light intensity of other pixel is within a reasonable range; if the difference is within the reasonable range, determining the at least one pixel corresponding to the light intensity is uniformly luminous; otherwise determining the at least one pixel corresponding to the acquired light intensity is not uniformly luminous.

4 . The method for detecting luminance uniformity of a screen according to claim 1 , characterized in that, lighting at least one pixel on a display panel of a screen comprises:
driving the pixels on the display panel of the screen to emit light according to a preset pattern.

5 . The method for detecting luminance uniformity of a screen according to claim 1 , characterized in that, lighting at least one pixel on a display panel of a screen comprises a step of:
lighting multiple pixels on the display panel of the screen, wherein the multiple pixels are arranged in a spaced array.

6 . The method for detecting luminance uniformity of a screen according to claim 1 , characterized in that, lighting at least one pixel on a display panel of a screen comprises:
lighting multiple pixels on the display panel of the screen, wherein some of the multiple pixels are arranged in an aggregated manner.

7 . The method for detecting luminance uniformity of a screen according to claim 1 , characterized in that, the method further comprises:
when it is determined that the at least one pixel is not uniformly luminous based the acquired light intensity, sequentially reducing the number of the multiple pixels that is luminous, and acquiring light intensity of the reduced pixels until a pixel that is not uniformly luminous is found.

8 . The method for detecting luminance uniformity of a screen according to claim 1 , characterized in that, acquiring light intensity of the pixel reflected by a non-opaque cover plate by a photoelectric sensor of the screen comprises:
using multiple photoelectric sensors corresponding to the lit pixels to acquire the light intensity of the pixels reflected by the non-opaque cover plate of the screen.

9 . The method for detecting luminance uniformity of a screen according to claim 1 , characterized in that, before lighting the at least one pixel on the display panel of the screen the method further comprises:
turning off all the pixels on the display panel; acquiring an ambient light intensity by the photoelectric sensor of the screen; determining whether the ambient light intensity is larger than a preset value; lighting the at least one pixel on the display panel of the screen if the ambient light intensity is less than or equal to the preset value.

10 . The method for detecting luminance uniformity of a screen according to claim 9 , characterized in that, when the ambient light intensity is larger than the preset value the method further comprises:
driving a prompting unit to send a prompt message of the ambient light being too strong.

11 . The method for detecting luminance uniformity of a screen according to claim 1 , characterized in that,
before lighting at least one pixel on the display panel of the screen the method further comprises: turning off all the pixels on the display panel, acquiring ambient light intensity by the photoelectric sensor of the screen; and determining whether the pixel is uniformly luminous based on the light intensity comprises: determining whether the pixel is uniformly luminous by subtracting the ambient light intensity from the acquired light intensity.

12 . The method for detecting luminance uniformity of a screen according to claim 1 , characterized in that, lighting at least one pixel on the display panel of the screen comprises:
acquiring a touched area of a touch screen; lighting at least one pixel corresponding to the touched area on the display panel of the screen.

13 . The method for detecting luminance uniformity of a screen according to claim 1 , characterized in that, the method further comprises a step of:
when it is determined that the pixel is not uniformly luminous based on the acquired light intensity, changing a driving current or voltage of the pixel according to a preset compensation rule so that the pixel is uniformly luminous.

14 . The method for detecting luminance uniformity of a screen according to claim 13 , characterized in that, changing driving current or voltage of the pixel according to a preset compensation rule so that the pixel is uniformly luminous comprises:
changing driving parameters of the screen to make the pixel illuminate uniformly.

15 . The method for detecting luminance uniformity of a screen according to claim 13 , characterized in that,
the step of “when it is determined that the pixel is not uniformly luminous based on the acquired light intensity, changing driving current or voltage of the pixel according to a preset compensation rule so that the pixel is uniformly luminous” comprises: sending the light intensity to a server; calculating and determining, by the server, whether the pixel is uniformly luminous based on the light intensity; generating, by the server, a screen driving parameter according to a preset compensation rule when the server determines that the pixel is not uniformly luminous based on the acquired light intensity; receiving, from the server, the screen driving parameter to adjust the driving current or voltage of the pixel so that the pixel is uniformly luminous.

16 . The method for detecting luminance uniformity of a screen according to claim 1 , characterized in that, the method further comprises steps of:
placing an object on the non-opaque cover plate; lighting at least one pixel of the display panel; acquiring light of the pixel totally reflected by the non-opaque cover plate by the photoelectric sensor, wherein the display panel and the photoelectric sensor are disposed under the non-opaque cover plate; shifting position of the at least one pixel to be lit in a preset time interval, repeating the step of lighting the pixel and the step of acquiring the light intensity; after performing the above steps for a preset number of times, stitching the light intensity acquired by the photoelectric sensor to acquire an image data of the object.

17 . The method for de

Assignees

• Shanghai Harvest Intelligence Tech Co Ltd

Inventors

• Huang Jiandong

Classifications

• G09G2360/144

  the light being ambient light · CPC title

• G09G2320/0233

  Improving the luminance or brightness uniformity across the screen · CPC title

• G09G3/3225 Primary

  using an active matrix · CPC title

• G09G2360/147

  the originated light output being determined for each pixel · CPC title

• G09G3/006 Primary

  Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays (testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309) · CPC title