Dual-Cell Display Panel with Black Spacer Walls for Contrast
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Solution Overview
Problem
Current liquid crystal display panels, despite advancements, still face challenges in achieving ideal display effects due to light leakage and interference between pixels, leading to suboptimal contrast ratios and display quality.
Innovation Solution
A dual-cell display panel design is implemented, comprising two sub-panels with filter pixels and display pixels arranged alternately, where black spacer walls with higher dielectric coefficients than the medium materials prevent light leakage and electric field interference, and fluorescence conversion structures enhance light utilization, resulting in improved contrast and brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional liquid crystal display panels are used, then manufacturing is simpler, but light leakage and interference between pixels occur leading to poor contrast ratios
Solution Approach 1:
The display panel is divided into two separate sub-panels: a first sub-panel with filter pixels for light filtering and a second sub-panel with display pixels for image generation. This segmentation allows each sub-panel to be optimized independently, with the filter pixels blocking light leakage and the display pixels generating controlled electric fields, thereby achieving high contrast ratios while maintaining manageable manufacturing complexity through modular assembly
Solution Approach 2:
Black spacer walls are introduced as intermediary structures between adjacent pixels in both sub-panels. These spacer walls serve as mediators that physically separate pixels and block light leakage between them. The spacer walls are filled with dielectric material having higher dielectric coefficient than the liquid crystal medium, which also prevents electric field interference between pixels, thus improving contrast without significantly increasing overall device complexity
2Reliability
If black spacer walls with higher dielectric coefficient are used, then light leakage and electric field interference are prevented, but manufacturing precision requirements increase
Solution Approach 1:
The dielectric coefficient of the spacer wall filling material is specifically changed to be higher than that of the liquid crystal medium. This parameter change enhances the light blocking capability and electric field isolation of the spacer walls. By carefully selecting materials with appropriate dielectric coefficient ratios, the patent achieves improved light blocking performance while controlling manufacturing precision requirements through standard material selection processes
Solution Approach 2:
The spacer walls are constructed as composite structures combining black matrix materials with dielectric filling materials. This composite approach allows the spacer walls to simultaneously provide mechanical separation, light blocking, and electric field isolation functions. The composite material structure enables standardized manufacturing processes while achieving the required high precision performance for preventing light leakage and pixel interference
3Reliability
If dual-cell design with filter pixels and display pixels is implemented, then contrast ratios improve, but device complexity increases
Solution Approach 1:
The display panel is segmented into two functional sub-panels: the first sub-panel containing filter pixels that generate electric fields to control light transmittance and block light leakage, and the second sub-panel containing display pixels that generate driving electric fields for image display. This segmentation enables each sub-panel to be optimized for its specific function, achieving high contrast ratios through coordinated operation while managing device complexity through modular architecture
Solution Approach 2:
The patent merges the light filtering function and the display function into a single integrated dual-cell structure. The filter pixels and display pixels are arranged alternately in a coordinated configuration, allowing both sub-panels to work together synergistically. This merging approach achieves high contrast ratios by combining the light blocking capability of filter pixels with the image generation capability of display pixels, while the integrated design helps manage overall device complexity
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 dual-cell design significantly enhances contrast ratios, approaching those of OLED panels, and improves display panel brightness, achieving higher light transmittance and aperture ratios while minimizing display defects.
Implementation Method 1
The liquid crystal layer includes liquid crystal molecules. In response to the electric field applied to the liquid crystal layer, the liquid crystal molecules in the liquid crystal layer rotate. Thus, the electric field changes an alignment direction of the liquid crystal molecules in the liquid crystal layer.
Implementation Method 2
the fluorescence conversion structure is configured to convert light having a wavelength shorter than a wavelength of light of a color of the display pixel where the fluorescence conversion structure is located into light of the color of the display pixel
Data Source
AI summary
The present disclosure provides a display panel, a manufacturing method thereof, and a display device. The display panel includes: a first medium and a first spacer wall between the first substrate and the second substrate, wherein the first sub-panel has filter pixels arranged at intervals, the first spacer wall is black and arranged along spaces between filter pixels, and a dielectric coefficient of the first spacer wall is greater than that of the first medium; and a second sub-panel on a light emergent side of the first sub-panel and including a second medium and a second spacer wall between the third substrate and the fourth substrate, wherein the second sub-panel has display pixels arranged at intervals, the second spacer wall is black and arranged along spaces between display pixels, and a dielectric coefficient of the second spacer wall is greater than that of the second medium.