Displaying device and driving method thereof

Patent metadata

Field	Value
Publication number	US-11620932-B2
Application number	US-202117202852-A
Country	US
Kind code	B2
Filing date	Mar 16, 2021
Priority date	Aug 26, 2020
Publication date	Apr 4, 2023
Grant date	Apr 4, 2023

Abstract

A displaying device and a driving method thereof, wherein the displaying device includes a first display panel, a second display panel and a driving circuit; the first display panel includes a plurality of first pixel units that are able to display a color, wherein each of the first pixel units includes a plurality of sub-pixel units; and the second display panel is provided on a light exiting side of the first display panel, including a plurality of second pixel units; wherein a distribution density of the plurality of second pixel units is greater than a distribution density of the plurality of sub-pixel units.

First claim

The invention claimed is:

1. A displaying device, wherein the displaying device comprises:
a first display panel, comprising a plurality of first pixel units that are able to display a color, wherein each of the first pixel units comprises a plurality of sub-pixel units; and
a second display panel, provided on a light exiting side of the first display panel, and comprising a plurality of second pixel units;
wherein a distribution density of the plurality of second pixel units is greater than a distribution density of the plurality of sub-pixel units;
a driving circuit configured for acquiring first grayscale values of each of the sub-pixel units of the first display panel, determining second grayscale values of each of the second pixel units of the second display panel according to the first grayscale values, and according to the second grayscale values, driving the second display panel to display, to regulate a transmittance of an emergent light of the first display panel through the second display panel;
wherein, the second grayscale values of each of the second pixel units of the second display panel are determined according to the first grayscale values of each of the sub-pixel units by interpolation;
the second display panel is a liquid-crystal display panel without a color film;
the first display panel is a liquid-crystal display panel provided with a color film;
the first display panel comprises third grid lines, the second display panel comprises fourth grid lines, and orthographic projections of the sub-pixel units connected to the third grid lines on the second display panel overlap with the second pixel units connected to the fourth grid lines; and
the driving circuit is further configured for, within a refresh cycle of one frame of image, outputting a scanning signal to the third grid lines and a scanning signal to the fourth grid lines, wherein the scanning signal to the fourth grid lines is delayed as compared with the scanning signal to the third grid lines; and
a delay time of the scanning signal to the fourth grid lines as compared with the scanning signal to the third grid lines is a response time of the first display panel.

2. The displaying device according to claim 1 , wherein an orthographic projection of each of the sub-pixel units on the second display panel covers a preset quantity of second pixel units.

3. The displaying device according to claim 1 , wherein the first display panel is an OLED display panel.

4. The displaying device according to claim 3 , wherein the first display panel comprises first grid lines, the second display panel comprises second grid lines, and orthographic projections of the sub-pixel units connected to the first grid lines on the second display panel overlap with the second pixel units connected to the second grid lines; and
the driving circuit is further configured for, within a refresh cycle of one frame of image, outputting synchronous scanning signals to the second grid lines and the first grid lines.

5. The displaying device according to claim 1 , wherein the displaying device further comprises: a backlight source that is provided on a side of the first display panel that is further away from the second display panel.

6. The displaying device according to claim 1 , wherein a refresh frequency of the first display panel and a refresh frequency of the second display panel are equal.

7. A driving method, wherein the method is for driving the displaying device according to claim 1 , and the driving method comprises:
acquiring the first grayscale values of each of the sub-pixel units of the first display panel; and
determining the second grayscale values of each of the second pixel units of the second display panel according to the first grayscale values, and according to the second grayscale values, driving the second display panel to display, to regulate the transmittance of the emergent light of the first display panel through the second display panel.

8. The driving method according to claim 7 , wherein the first display panel comprises a first sub-pixel unit, an orthographic projection of the first sub-pixel unit on the second display panel covers a preset quantity of second pixel units, and the step of determining second grayscale values of each of the second pixel units of the second display panel according to the first grayscale values comprises:
according to the first grayscale value of the first sub-pixel unit, the first grayscale values of neighboring sub-pixel units of the first sub-pixel unit, and the preset quantity, determining second grayscale values that correspond to the preset quantity of second pixel units.

9. The driving method according to claim 8 , wherein the step of, according to the first grayscale value of the first sub-pixel unit, the first grayscale values of the neighboring sub-pixel units of the first sub-pixel unit, and the preset quantity, determining the second grayscale values that correspond to the preset quantity of second pixel units comprises:
according to a difference between the first grayscale value of the first sub-pixel unit and the first grayscale values of neighboring sub-pixel units of the first sub-pixel unit, and the preset quantity, by interpolative processing, determining the second grayscale values that correspond to the preset quantity of second pixel units.

10. A calculating and processing device, wherein the calculating and processing device comprises:
a memory storing a computer-readable code; and
one or more processors, wherein when the computer-readable code is executed by the one or more processors, the calculating and processing device implements the driving method according to claim 7 .

11. A computer program product, wherein the computer program product comprises a non-transitory computer readable storage medium storing computer-readable code, and when the computer-readable code is executed on a calculating and processing device, the computer-readable code causes the calculating and processing device to implement the driving method according to claim 7 .

12. A non-transitory computer-readable medium, wherein the non-transitory computer-readable medium stores the computer program according to claim 11 .

Assignees

• Beijing Boe Optoelectronics Tech Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Wang Zhiqiang
• Xu Lin
• Ma Xin
• Wang Qiuli
• Sun Chuan
• Yao Jianfeng
• Tan Dingyang
• Wang Xinyu

Classifications

• G09G3/2074 Primary

  using sub-pixels · CPC title

• G09G3/36 Primary

  using liquid crystals · CPC title

• G09G2320/066

  for control of contrast · CPC title

• G09G3/3611

  Control of matrices with row and column drivers · CPC title

• G09G2330/023

  using energy recovery or conservation · CPC title