Dimming Panel Pixel Electrode Design for Display Contrast
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Solution Overview
Problem
Current display devices using a combination of display and dimming panels face challenges in enhancing display quality, particularly in maintaining contrast and preventing parallax displacement, which degrades image clarity.
Innovation Solution
A configuration comprising a liquid crystal display panel and a dimming panel, where the dimming panel is positioned between the liquid crystal display panel and the backlight unit, with a light-shielding film and pixel electrode design that aligns with the liquid crystal display panel's structure to control brightness and prevent misalignment, thereby improving contrast and display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dimming panel is added to improve contrast, then display quality is improved, but device complexity increases
Solution Approach 1:
The patent combines the display panel and dimming panel into a single integrated device structure, where the dimming panel is positioned behind the display panel to control backlight transmission. This merging approach allows both functions (display and dimming) to work together as one system, improving contrast while managing the complexity through unified design rather than separate components.
2Reliability
If signal lines are extended to connect pixels, then pixel functionality is improved, but parallax displacement occurs degrading image clarity
Solution Approach 1:
The patent applies different bending directions to signal lines in different regions of the pixel electrode. Specifically, signal lines in one region bend in a first direction while signal lines in another region bend in a second direction, allowing each local area to be optimized for its specific function while maintaining overall image clarity and preventing parallax displacement.
3Reliability
If light-shielding film is used to control brightness, then contrast is improved, but opening ratio of dimming area decreases
Solution Approach 1:
The patent optimizes the parameters of the light-shielding film including its thickness, material composition, and pattern design to achieve effective light blocking for contrast improvement while minimizing the area occupied by the shielding structures. By carefully adjusting these parameters, the design balances contrast enhancement with maintaining an adequate opening ratio for light transmission.
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 enhances display quality by improving contrast and preventing parallax displacement, resulting in better image clarity and an increased opening ratio of the dimming area.
Implementation Method 1
a liquid crystal layer LC1 sandwiched between the first substrate SUB11 and the second substrate SUB21
Implementation Method 2
an adhesive layer OCA that adheres the first display panel and the second display panel to each other
Data Source
AI summary
According to one embodiment, a display device includes a first display panel, a second display panel and an adhesive layer which adheres the first and second display panels. The first display panel includes a first scanning line, a first signal line, a first pixel electrically connected to the first scanning line and the first signal line, and the first pixel includes a first pixel electrode including first line portions extending parallel to the first signal line. The second display panel includes a second scanning line, a second signal line, and a second pixel electrically connected to the second scanning line and the second signal line, and the second pixel includes a second pixel electrode including second line portions intersecting the second signal line in plan view.