VR Display Backlight Segmentation for Smear and Light Leakage
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Solution Overview
Problem
Liquid crystal display devices in virtual reality products face issues with smear and light leakage due to rapid response requirements, and existing backlight black insertion techniques are limited in dynamic brightness adjustment and suffer from light leakage between partitions.
Innovation Solution
A display device with a liquid crystal panel and a backlight that includes sub-pixel and sub-light source groups, respectively, with a second black matrix in the backlight to prevent light leakage, and a light source group controller to dynamically control the lighting and brightness of sub-light source groups, ensuring synchronization and adjustable continuous lighting time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If backlight black insertion technique is used to reduce smear, then response speed is improved, but light leakage between partitions occurs and dynamic brightness adjustment is limited
Solution Approach 1:
The backlight is divided into multiple independent sub-light source groups corresponding to different vertical regions of the display panel. Each sub-light source group can be controlled independently, allowing selective illumination of specific regions. This segmentation enables the black matrix between partitions to effectively block light leakage while maintaining the ability to dynamically adjust brightness in different regions, resolving the contradiction between reducing smear and preventing light leakage.
Solution Approach 2:
The patent implements dynamic control of sub-light source groups through a light source group controller that receives vertical synchronization signals and controls the timing and brightness of each sub-light source group independently. This dynamic control allows the system to adjust brightness levels and lighting timing adaptively, enabling effective smear reduction while preventing light leakage between partitions through coordinated control of multiple sub-light source groups.
2Duration of action of moving object
If backlight is uniformly controlled for smear reduction, then response time is improved, but brightness adjustment flexibility is reduced
Solution Approach 1:
The backlight is segmented into multiple sub-light source groups that can be controlled independently with different continuous lighting times and brightness levels. This segmentation allows the system to apply different lighting durations and intensity levels to different vertical regions, providing flexible brightness adjustment while maintaining effective smear reduction through coordinated control of each sub-light source group.
Solution Approach 2:
Different sub-light source groups can be assigned different brightness levels and continuous lighting times based on local requirements. The light source group controller enables independent adjustment of lighting parameters for each sub-light source group, allowing optimized brightness control in different regions of the display while maintaining overall smear reduction performance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces smear and light leakage, allowing for flexible and dynamic brightness adjustment, enhancing user experience by preventing light leakage between partitions and improving screen brightness.
Implementation Method 1
a first black matrix, which is disposed between two adjacent sub-pixel groups... a second black matrix, which second black matrix is disposed between two adjacent sub-light source groups
Implementation Method 2
each of the plurality of sub-light source groups includes one or more light emitting devices, each light emitting device corresponds to at least one sub-pixel, and the one or more light emitting devices is organic light emitting diodes
Data Source
AI summary
A display device, a virtual reality display apparatus and a display device control method. The display device includes: a liquid crystal panel, which includes a plurality of sub-pixel groups and a first black matrix, each of the sub-pixel groups including n consecutive rows of sub-pixels, the first black matrix being disposed between two adjacent sub-pixel groups, and n being any positive integer, and a backlight, which includes a plurality of sub-light source groups and a second black matrix, which second black matrix is disposed between two adjacent sub-light source groups, each of the sub-light source groups being disposed in one-to-one correspondence with each of the sub-pixel groups, and the second black matrix having the same light-shielding region as the first black matrix.