Overlapping Liquid Crystal Panels with Virtual Opposing Regions
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Solution Overview
Problem
Liquid crystal display devices with two superimposed panels face complexity in calculating panel input gray scale data due to differing pixel numbers, leading to increased circuit size and processing complexity for achieving desired luminance.
Innovation Solution
A liquid crystal display device with a first and second liquid crystal panel, where the second panel has subpixels and a control unit that selects subpixel gray scale data for virtual opposing regions, controlling transmittance based on input image signals and storing pre-calculated data for efficient gray scale determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If two liquid crystal panels with different pixel sizes are superimposed, then contrast is improved, but the correspondence between pixels becomes non-one-to-one, leading to increased complexity in calculating panel input gray scale data
Solution Approach 1:
The display area is divided into multiple virtual opposing regions, where each region corresponds to one pixel of the first panel and contains multiple subpixels of the second panel. This segmentation allows independent gray scale control for each virtual opposing region, simplifying the calculation process by treating each region as an independent unit rather than dealing with all pixel correspondences simultaneously.
Solution Approach 2:
Virtual opposing regions are introduced as intermediary structures between the pixels of the first panel and subpixels of the second panel. These virtual regions serve as mediators that establish a systematic mapping relationship, enabling the control unit to calculate panel input gray scale data through a structured approach rather than direct complex pixel-to-pixel correspondence.
2Illumination intensity
If two liquid crystal panels with different pixel sizes are superimposed, then contrast is improved, but circuit size increases due to complex processing requirements
Solution Approach 1:
By segmenting the display area into virtual opposing regions with systematic correspondence relationships, the control complexity is reduced. This allows for more efficient circuit design that can handle the gray scale calculations without requiring excessively large circuit size, as each virtual region can be processed independently through standardized calculation procedures.
3Ease of manufacture
If panel pixel number is fixed during design, then manufacturing is simplified, but resolution conversion from various display pixel numbers becomes necessary, increasing processing complexity
Solution Approach 1:
The system dynamically adapts to different input image resolutions by establishing virtual opposing regions that can accommodate various display pixel numbers. While the physical panel pixel number remains fixed for manufacturing simplicity, the virtual region mapping dynamically adjusts to handle different resolutions, separating the static manufacturing advantage from the dynamic processing capability.
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
This approach reduces circuit size and processing complexity while maintaining high contrast and luminance, effectively addressing the challenge of differing pixel numbers between panels.
Implementation Method 1
a first liquid crystal panel including a plurality of first pixels; a second liquid crystal panel provided to overlap the first liquid crystal panel
Data Source
AI summary
A control unit receives an input image signal including input display gray scale data corresponding to the virtual opposing regions, selects a set of pieces of subpixel gray scale data corresponding to the virtual opposing regions from the input display gray scale data, extracts a maximum amount of subpixel gray scale data among the set of pieces of subpixel gray scale data as extracted gray scale data corresponding to one first pixel facing the virtual opposing regions among the plurality of first pixels, and controls a transmittance of light of the one first pixel using designated pixel gray scale data in a case where the extracted gray scale data has a level equal to or higher than an output determination reference gray scale level, the designated pixel gray scale data being gray scale data having a maximum transmittance of a first liquid crystal panel.