Liquid Crystal Display Panel with Recessed Bridging Electrodes
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Solution Overview
Problem
Conventional liquid crystal display panels with four-domain configurations experience reduced transmittance due to increased geometric area occupied by dark lines at domain boundaries, making it challenging to achieve adequate transmittance.
Innovation Solution
A liquid crystal display panel with a VA mode configuration featuring rectangular pixels, each divided into four domains with specific alignment azimuths (135°, 225°, 45°, and 315°) and a bridging portion with recesses between pixel electrode portions, which reduces the geometric area of dark lines and enhances transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If one pixel is divided into four domains with different alignment azimuths to improve viewing angle characteristics, then viewing angle characteristics are improved, but dark lines appear at domain boundaries reducing transmittance and contrast ratio
Solution Approach 1:
The patent applies different alignment azimuths to different domains within a pixel (45°, 135°, 225°, 315°), creating local quality variations that improve viewing angle characteristics while minimizing dark line effects through careful selection of azimuth angles
2Illumination intensity
If alignment azimuths are set to 135°, 225°, 45° and 315° to enhance transmittance, then transmittance is improved, but the geometric area occupied by dark lines increases
Solution Approach 1:
The patent carefully selects and adjusts the alignment azimuth parameters (45°, 135°, 225°, 315°) to optimize the balance between transmittance enhancement and dark line area reduction, achieving adequate transmittance with minimized dark line geometric area
3Adaptability or versatility
If four-domain configuration is used to improve display performance, then viewing angle characteristics are improved, but device complexity increases
Solution Approach 1:
The patent divides each pixel into four domains with different alignment azimuths, using segmentation to improve display performance and viewing angle characteristics while maintaining a manageable configuration through systematic arrangement
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 proposed configuration effectively minimizes the geometric area of dark lines, thereby achieving adequate transmittance with a simple configuration, improving the display panel's performance.
Implementation Method 1
a liquid crystal composition is sealed in between a pair of substrates; a liquid crystal display panel including this pair of substrates and the liquid crystal composition, these being sandwiched between a pair of polarizers, is irradiated with light from a backlight; and a voltage is applied to the liquid crystal composition in order to change the alignment of the liquid crystal molecules, whereby the amount of light passing through the liquid crystal display panel is controlled
Implementation Method 2
a liquid crystal display panel including this pair of substrates and the liquid crystal composition, these being sandwiched between a pair of polarizers
Data Source
AI summary
A liquid crystal display panel includes a first substrate section having a first substrate and pixel electrodes (102). Each pixel electrode (102) includes a bridging portion (102c) provided between a first pixel electrode portion (102a) and a second pixel electrode portion (102b) and linking together the first pixel electrode portion (102a) and the second pixel electrode portion (102b). A first recess (102d) is provided at one side along the width direction of the pixel electrode (102), the first recess (102d) extending from one side along the width direction of the pixel electrode (102) toward the bridging portion (102c) and being located between the first pixel electrode portion (102a) and the second pixel electrode portion (102b). A second recess (102e) is provided at another side along the width direction of the pixel electrode (102), the second recess (102e) extending from the other side along the width direction of the pixel electrode (102) toward the bridging portion (102c) and being located between the first pixel electrode portion (102a) and the second pixel electrode portion (102b).