Liquid Crystal Display Groove Charge Control
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Solution Overview
Problem
Conventional liquid crystal display devices experience unintended color discoloration due to electric charges generated by wiring coupling, affecting the display image.
Innovation Solution
A liquid crystal display device with a groove in the light non-transmitting layer of the color filter substrate, filled with a high-resistance material matching the color resist, which prevents charge propagation and minimizes the impact on the display image, while the groove's blue color or mixed color light makes it less conspicuous.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the light non-transmitting layer is made continuous in the non-display region, then charge propagation is prevented, but manufacturing complexity increases due to additional grooves and filling steps
Solution Approach 1:
The light non-transmitting layer is segmented into a display region and a non-display region (frame-shaped region). The groove is formed only in the non-display region, allowing the layer to be discontinuous where charges are generated while maintaining continuity in the display region where image quality is critical.
Solution Approach 2:
Different regions of the light non-transmitting layer are given different structures: the display region maintains a continuous, flat structure for optimal display performance, while the non-display region incorporates grooves filled with light-transmitting material to block charge propagation without affecting the display area.
2Reliability
If the groove is filled with light-transmitting material, then charge propagation is blocked, but light leakage may occur affecting display quality
Solution Approach 1:
The groove is positioned specifically in the non-display region where light leakage would not be visible. The light non-transmitting layer surrounding the groove continues to provide light blocking, confining any potential light leakage to an invisible area.
Solution Approach 2:
The light-transmitting material in the groove acts as an intermediary that blocks charge propagation while the surrounding light non-transmitting material acts as a barrier to contain any light leakage, preventing it from reaching the display region.
3Ease of manufacture
If the groove is filled with color resist material, then manufacturing steps are simplified, but the groove may become visible affecting appearance
Solution Approach 1:
The groove is filled with blue color resist material that matches or complements the blue color of the pixel electrode. This color matching makes the groove less conspicuous and blends it into the overall display appearance.
Solution Approach 2:
The groove, which could be considered a defect or visible imperfection, is converted into a beneficial feature by filling it with color resist material that blocks charges while its color makes it less visible, turning a potential harm into a benefit.
4Length of stationary object
If the light non-transmitting layer is made thinner, then device thickness is reduced, but charge blocking capability is weakened
Solution Approach 1:
The light non-transmitting layer is made of a material with high electrical resistance properties that effectively blocks charge propagation even at reduced thickness. The combination of this specialized material with the groove structure achieves both thinness and effective charge blocking.
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 effectively reduces the influence of electric charges on the display image and avoids increasing the device's thickness, maintaining image quality and manufacturing simplicity.
Implementation Method 1
a light non-transmitting layer made of a material that limits transmission of light
Implementation Method 2
The frame-shaped non-display region has a groove formed in one side thereof, along the one side, the groove passing through the light non-transmitting layer
Data Source
AI summary
Provided is a liquid crystal display device, including: a TFT substrate including a pixel electrode; a liquid crystal layer provided on the TFT substrate; and a color filter substrate provided on the liquid crystal layer. The color filter substrate includes a light non-transmitting layer made of a material that limits transmission of light. The light non-transmitting layer includes: a display region including a hole portion filled with a color resist that transmits light; and a frame-shaped non-display region surrounding the display region. The frame-shaped non-display region has a slit formed in one side thereof, along the one side, the slit passing through the light non-transmitting layer. The slit is filled with a member made of the same material as a material of the color resist.