Transmissive Reflective Display Panel Common Electrode
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Solution Overview
Problem
Existing display technologies face challenges in achieving a thin, high-reliability display panel that can efficiently switch between black-and-white and color displays while minimizing manufacturing costs and thickness, as dual-screen designs are costly and bulky.
Innovation Solution
A display panel design featuring transmissive and reflective regions with a common electrode configuration, thin-film transistors, and pixel electrodes, allowing for the same voltage signal to be applied across all regions to control liquid crystal molecules for both color and black-and-white displays, ensuring no light leakage and maintaining the same voltage levels to prevent abnormal displays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If a dual-screen design (black-and-white display and color display) is used to switch between low power consumption and color display modes, then power consumption requirements can be met, but manufacturing cost increases and overall thickness becomes large
Solution Approach 1:
The patent combines black-and-white display and color display functions into a single display panel by dividing it into different display regions. The first display region uses a first common electrode while the second display region uses a second common electrode, allowing both display modes to coexist in one integrated structure rather than requiring separate screens.
Solution Approach 2:
The display panel is segmented into multiple display regions with different electrode configurations. The first display region is configured for black-and-white display with a first common electrode, while the second display region is configured for color display with a second common electrode, enabling functional division within a unified structure.
2Adaptability or versatility
If a dual-screen design is used to achieve black-and-white and color display switching, then display functionality is improved, but the overall thickness of the display screen increases
Solution Approach 1:
The patent merges black-and-white and color display capabilities into a single panel thickness by using different common electrode configurations in different regions. This eliminates the need for stacked or separate display layers that would increase overall thickness.
3Adaptability or versatility
If different common electrodes are used in different display regions, then display mode switching is enabled, but voltage consistency and light leakage prevention become challenging
Solution Approach 1:
The patent applies equipotentiality by configuring both the first common electrode and the second common electrode to receive the same voltage signal. This ensures that different display regions maintain consistent voltage levels, preventing abnormal displays and light leakage while enabling flexible display mode switching.
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 solution enables reliable switching between color and black-and-white displays using a single display screen, reducing manufacturing costs and thickness, while improving the aperture ratio and preventing light leakage, thus enhancing display performance.
Implementation Method 1
a liquid crystal layer between the array substrate and the color film substrate
Implementation Method 2
The reflective layer is at a side of the plurality of the second pixel electrodes adjacent to the liquid crystal layer
Data Source
AI summary
A display panel and a display device are provided. The display panel includes a display region, a color film substrate, and an array substrate. The display region includes transmissive regions each including color sub-pixels, and reflective regions each including black-and-white sub-pixels. A first common electrode is configured in the color film substrate corresponding to all of the transmissive regions and the reflective regions. A plurality of first pixel electrodes is configured in a portion of the array substrate corresponding to the transmissive regions. A plurality of second pixel electrodes, a reflective layer and a plurality of first thin-film transistors are configured in a portion of the array substrate corresponding to the reflective regions. One first thin-film transistor is electrically connected to one first pixel electrode. A second common electrode is configured in the array substrate corresponding to all of the transmissive regions and the reflective regions.