Gamma Data Generator for LCD Side Visibility
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Solution Overview
Problem
Liquid crystal display (LCD) panels have limited side visibility due to their non-self-emissive nature and require external light sources, which restricts their display quality and usability.
Innovation Solution
A display apparatus and method utilizing a multi-domain technique with spatial, temporal, and spatio-temporal patterns to generate gamma data for sub-pixels, employing high and low gamma values in a cascade method to enhance side visibility, involving a gamma data generator and data driver to convert gamma data into data voltage for improved display performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional LCD panel is used with standard gamma settings, then the device structure remains simple and manufacturing is easy, but side visibility is limited and display quality is poor
Solution Approach 1:
The gamma data generation is segmented into multiple gamma values (first gamma, second gamma, third gamma) that are selectively applied to different sub-pixels based on their spatial positions. This segmentation allows different regions of the display to use different gamma characteristics, improving side visibility while managing complexity through structured division of the display area into zones with specific gamma assignments
Solution Approach 2:
The patent introduces a temporal dimension to gamma data generation by alternating between different gamma values across multiple frames. Instead of using a single static gamma setting, the system dynamically switches between first gamma, second gamma, and third gamma values in a time-division manner, creating a multi-dimensional gamma control strategy that enhances side visibility without permanently increasing hardware complexity
2Illumination intensity
If multiple gamma values are applied to different sub-pixels using spatial and temporal patterns, then side visibility is significantly enhanced, but the gamma data generation process becomes more complex
Solution Approach 1:
The system employs periodic action by alternating between different gamma values in a regular temporal pattern. First gamma data is applied in odd frames while second gamma data is applied in even frames, with third gamma data used in specific sub-pixel regions. This periodic switching creates a temporal modulation effect that improves side visibility while maintaining a predictable, rule-based generation process that simplifies implementation
Solution Approach 2:
Different gamma values are assigned to different spatial locations and sub-pixel types within the display panel. Specifically, first gamma data is applied to red sub-pixels, second gamma data to green sub-pixels, and third gamma data to blue sub-pixels in odd frames, with complementary assignments in even frames. This local differentiation optimizes side visibility for each color channel while maintaining overall system manageability through consistent spatial-temporal mapping rules
Data Source
AI summary
A display apparatus includes a gamma data generator comprising a spatial pattern having at least a high gamma and a low gamma corresponding to a plurality of sub-pixels arranged in a matrix array in a space division configuration, a temporal pattern having the high gamma and the low gamma corresponding to the plurality of sub-pixels in a time division configuration and a spatio-temporal pattern having the high gamma and the low gamma corresponding to the plurality of sub-pixels in both a space and time division configuration, and configured to generate gamma data of a sub-pixel using the spatial pattern, the temporal pattern and the spatio-temporal pattern in a cascade configuration.