Virtual reality display device, host device, system and data processing method

Patent metadata

Field	Value
Publication number	US-11715441-B2
Application number	US-202117362944-A
Country	US
Kind code	B2
Filing date	Jun 29, 2021
Priority date	Nov 13, 2020
Publication date	Aug 1, 2023
Grant date	Aug 1, 2023

Abstract

Provided are a virtual reality display device, a host device, a system and a data processing method. The virtual reality display device includes a display panel and a drive chip, wherein the drive chip includes a first processing module and a drive module; the first processing module is configured to decode an image to be decoded with a third color depth sent by a second processing module in a virtual reality host device to obtain a first image with a first color depth and a second image with a second color depth, the third color depth is greater than or equal to the first color depth, and the second color depth is less than the first color depth; the drive module is configured to generate a first data voltage corresponding to the first image and a second data voltage corresponding to the second image.

First claim

What we claim is:

1. A virtual reality display device, comprising:
a display panel and a drive chip, wherein:
the drive chip comprises a first processing module and a drive module, wherein the drive module is connected to the first processing module and the display panel;
the first processing module is configured to decode an image to be decoded with a third color depth sent by a second processing module in a virtual reality host device to obtain a first image with a first color depth displayed in a fixation region of the display panel and a second image with a second color depth displayed in a non-fixation region of the display panel, wherein the third color depth is greater than or equal to the first color depth and the second color depth is smaller than the first color depth;
the drive module is configured to generate a first data voltage corresponding to the first image based on the first image and a second data voltage corresponding to the second image based on the second image; apply the first data voltage to the fixation region of the display panel and apply the second data voltage to the non-fixation region of the display panel to drive the display panel to display an image with the first color depth in the fixation region and with the second color depth in the non-fixation region;
the display panel comprises M rows and N columns of sub-pixels and N columns of data lines, wherein an ith column of data lines is connected to an ith column of sub-pixels, M and N are positive integers, and i is a positive integer less than or equal to N;
the drive module comprises a voltage generation unit, a digital-to-analog conversion unit and a multiplexer circuit;
the multiplexer circuit is connected to the N columns of data lines;
the voltage generation unit is configured to generate a first reference voltage for digital-to-analog conversion of a first digital voltage signal corresponding to the first image and generate a second reference voltage for digital-to-analog conversion of a second digital voltage signal corresponding to the second image; and
the digital-to-analog conversion unit is connected to the first processing module, the voltage generation unit and the multiplexer circuit and is configured to perform a digital-to-analog conversion on the first digital voltage signal based on the first reference voltage to generate a first analog voltage signal corresponding to the first digital voltage signal; perform a digital-to-analog conversion on the second digital voltage signal based on the second reference voltage to generate a second analog voltage signal corresponding to the second digital voltage signal; and control the multiplexer circuit to apply the first analog voltage signal as the first data voltage to the fixation region in the display panel and apply the second analog voltage signal as the second data voltage to the non-fixation region in the display panel to drive the display panel to display the image in the first color depth in the fixation region and in the second color depth in the non-fixation region.

2. The virtual reality display device of claim 1 , wherein the voltage generation unit comprises a resistor-string (R-string), a first output terminal and a second output terminal, wherein
the R-string is configured to divide voltage of an original reference voltage to generate the first reference voltage and the second reference voltage;
a first output terminal of the voltage generation unit is configured to output the first reference voltage to the digital-to-analog conversion unit; and
a second output terminal of the voltage generation unit is configured to output the second reference voltage to the digital-to-analog conversion unit, wherein a quantity of the second reference voltage is smaller than a quantity of the first reference voltage.

3. The virtual reality display device of claim 2 , wherein the digital-to-analog conversion unit comprises a first sub-digital-to-analog conversion unit and a second sub-digital-to-analog conversion unit, wherein
a first input terminal of the first sub-digital-to-analog conversion unit is connected to the first processing module, a second input terminal of the first sub-digital-to-analog conversion unit is connected to a first output terminal of the voltage generation unit, and an output terminal of the first sub-digital-to-analog conversion unit is connected to the multiplexer circuit; the first sub-digital-to-analog conversion unit is configured to perform digital-to-analog conversion processing on the first digital voltage signal based on the first reference voltage to generate a first analog voltage signal corresponding to the first digital voltage signal; control the multiplexer circuit to apply the first analog voltage signal as the first data voltage to the fixation region in the display panel to drive the display panel to display the image with the first color depth in the fixation region;
a first input terminal of the second sub-digital-to-analog conversion unit is connected to the first processing module, a second input terminal of the second sub-digital-to-analog conversion unit is connected to a second output terminal of the voltage generation unit, and an output terminal of the second sub-digital-to-analog conversion unit is connected to the multiplexer circuit; the second sub-digital-to-analog conversion unit is configured to perform digital-to-analog conversion processing on the second digital voltage signal based on the second reference voltage to generate a second analog voltage signal corresponding to the second digital voltage signal; control the multiplexer circuit to apply the second analog voltage signal as the second data voltage to the non-fixation region in the display panel to drive the display panel to display the image with the second color depth in the non-fixation region.

4. The virtual reality display device of claim 3 , wherein the multiplexer circuit comprises a first group of multiplexer units and a second group of multiplexer units, wherein
the first group of multiplexer units comprises N first multiplexer units, wherein an input terminal of an ith first multiplexer unit is connected to an output terminal of the first sub-digital-to-analog conversion unit, and an output terminal of the ith first multiplexer unit is connected to a data line in an ith column, i is a positive integer less than or equal to N;
the second group of multiplexer units comprises N second multiplexer units, wherein an input terminal of an ith second multiplexer unit is connected to an output terminal of the second sub-digital-to-analog conversion unit, and an output terminal of the ith second multiplexer unit is connected to the data line in the ith column;
the first sub-digital-to-analog conversion unit is configured to control the first group of multiplexer units to apply the first analog voltage signal as the first data voltage to the fixation region in the display panel to drive the display panel to display the image with the first color depth in the fixation region; and
the second sub-digital-to-analog conversion unit is configured to control the second group of multiplexer units to apply the second analog voltage signal as the second data voltage to the non-fixation region in the display panel to drive the display panel to display the image with the second color depth in the non-fixation region.

5. A data processing method, applied to the virtual reality display device of claim 1 , the method comprising:
decoding an image to be decoded with a third color depth sent by a virtual reality host device to obtain a first image with a first color depth displayed in a fixation region of a display panel of the virtual reality display device and a second image with a second color depth displayed in a non-fixation region of the display panel, wherein the t

Assignees

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

Inventors

• Li Wenyu
• Miao Jinghua
• Chen Lili
• Zhang Hao
• Zong Shaolei
• Duan Xin
• Sun Jigang
• Sun Wei

Classifications

• G09G5/02 Primary

  characterised by the way in which colour is displayed {(details of colour display specific for CRTs G09G1/28; specific for flat matrix panels other than liquid crystal displays G09G3/2003; specific for liquid crystal displays G09G3/3607)} · CPC title

• G09G5/003

  Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto (specific for a CRT G09G1/165; for a flat panel G09G3/2092) · CPC title

• G09G2300/0804

  Sub-multiplexed active matrix panel, i.e. wherein one active driving circuit is used at pixel level for multiple image producing elements · CPC title

• G09G2300/0828

  forming a digital to analog [D/A] conversion circuit · CPC title

• G09G2310/0297

  Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns · CPC title