Liquid Crystal Display Backlight Partition Control for Optical Crosstalk
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Solution Overview
Problem
Liquid crystal display panels suffer from optical crosstalk due to light scattering, leading to inaccurate brightness control and reduced display quality, which affects user experience and power consumption.
Innovation Solution
A driving method for liquid crystal display panels that normalizes images, extends backlight boundaries, determines backlight opening coefficients, and applies a fusion process to obtain a driving current, accounting for optical luminance crosstalk to improve brightness control and contrast.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If dynamic partition backlight is used to control light source individually according to brightness requirement, then brightness control is improved, but optical crosstalk between adjacent partitions occurs due to light scattering, worsening display quality
Solution Approach 1:
The backlight is divided into multiple independent partitions that can be controlled separately. Each partition corresponds to a specific region of the display panel, allowing independent brightness adjustment for different areas to optimize local display quality while managing light distribution.
Solution Approach 2:
Different brightness levels are applied to different partitions based on local display requirements. The system adjusts the illumination intensity of each partition individually according to the content being displayed in that region, achieving optimized local quality rather than uniform global control.
2Illumination intensity
If light guide plate is used in straight-incident backlight, then backlight distribution is improved, but device complexity increases
Solution Approach 1:
The light guide plate component is removed from the backlight structure. Instead of using a separate light guide plate to distribute light, the system directly controls LED light sources to illuminate different partitions, simplifying the overall structure while maintaining backlight distribution functionality.
Solution Approach 2:
The LED light sources serve multiple functions: they provide illumination and simultaneously act as the backlight distribution mechanism. By making the light sources themselves responsible for both lighting and light distribution, the system eliminates the need for separate light guide plates and achieves structural simplification.
Data Source
AI summary
The present invention discloses a liquid crystal display panel and a driving method thereof, and a liquid crystal display, which the driving method comprises: normalizing an image to be displayed first, to obtain characteristic data of the input image; extending backlight boundary of each backlight partition according to a default condition, and determining a backlight opening coefficient of each backlight partition by data information after the backlight boundary extension; the backlight opening coefficient of each backlight partition subjected to a fusion process, to obtain a driving current of the liquid crystal display panel; obtaining characteristic data of output image of each backlight partition based on the characteristic data of the input image and the driving current; displaying the output image by the driving current and the characteristic data. It is possible to display high-quality picture information in the case of optical crosstalk existing in the liquid crystal display panel.