Display device
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Solution Overview
Problem
Existing display devices face challenges in reducing short circuits between pixel and common electrodes while improving light transmittance from one surface to the opposite surface, particularly in enhancing the visibility of background images through the display panel.
Innovation Solution
The display device incorporates a grid-shaped organic insulating layer covering scan and signal lines, with pixel electrodes partially overlapping a slant surface of this layer, and a counter substrate featuring a common electrode covered by an insulating protective film and orientation film, allowing direct stacking without an intervening film in specific regions to reduce short circuits and enhance light transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective film is provided over the common electrode to prevent short circuits, then reliability is improved, but light transmittance deteriorates
Solution Approach 1:
The protective film is selectively removed in specific regions (first regions and second regions) to create local variations in film presence. This allows the film to provide protection where needed while maintaining high light transmittance in display areas, thus resolving the contradiction between reliability and illumination intensity
Solution Approach 2:
The protective film structure is segmented into regions with and without the film. The film is divided into continuous portions (in third regions) and removed portions (in first and second regions), creating a segmented structure that balances protection and light transmission requirements
2Illumination intensity
If the protective film is completely removed to improve light transmittance, then illumination intensity is improved, but reliability deteriorates due to increased short circuit risk
Solution Approach 1:
Rather than completely removing the protective film, the invention applies local quality by selectively removing the film only in specific regions (first and second regions) while maintaining it in other areas (third regions). This localized approach improves light transmittance where needed while preserving reliability through continued protection in critical areas
Solution Approach 2:
The protective film is segmented into retained portions and removed portions, creating a hybrid structure that combines the benefits of both complete film presence (reliability) and complete film removal (light transmittance) in different areas of the display device
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 configuration effectively reduces short circuits and improves light transmittance, leading to enhanced visibility of background images and uniform luminance distribution across the display panel.
Implementation Method 1
a liquid crystal layer including polymer-dispersed liquid crystals filled between the first and the second light-transmitting substrates
Data Source
AI summary
A display device includes an array substrate, a counter substrate, and a liquid crystal layer between the array substrate and the counter substrate. The array substrate includes signal lines, scan lines, a grid-shaped organic insulating layer covering over the scan lines and the signal lines, pixel electrodes, and a first orientation film covering the pixel electrodes. A portion of each pixel electrode is provided above a slant surface of the organic insulating layer and overlaps the slant surface. The counter substrate includes a common electrode overlapping the pixel electrodes, an insulating protective film covering the common electrode, and a second orientation film covering the protective film and the common electrode. A region overlapping an opening surrounded by the scan lines and the signal lines has a non-overlapping region of the protective film where the common electrode and the second orientation film are directly stacked without interposing the protective film therebetween.