Black Matrix Reflection Layer for LCD Brightness
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Solution Overview
Problem
Conventional liquid crystal display devices suffer from reduced brightness due to light absorption by the black matrix, which limits the utilization of backlight light and affects image quality.
Innovation Solution
A liquid crystal display device with a black matrix on the second substrate having a reflection layer on its surface, arranged in horizontal and vertical directions along pixel boundaries, which reflects incident light into adjacent pixel regions, enhancing brightness by re-reflecting it with the polarizer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a black matrix is used to define pixel regions and prevent light leakage, then display quality and contrast are improved, but light from the backlight is absorbed and lost, reducing overall brightness
Solution Approach 1:
The patent applies the principle of converting harm into benefit by transforming the light-absorbing property of the black matrix into a light-reflecting function. By introducing a reflection layer on the black matrix, light that would normally be absorbed is instead reflected back into the pixel region, converting the harmful light loss into a beneficial brightness enhancement while maintaining the black matrix's original function of defining pixel regions and preventing light leakage.
2Reliability
If light is absorbed by the black matrix to prevent leakage, then image contrast is improved, but the utilization of backlight light is reduced
Solution Approach 1:
The reflection layer converts the previously harmful light absorption into a beneficial light reflection process. The black matrix still performs its contrast-enhancing function by blocking light leakage, while the added reflection layer recycles light that would be lost, reflecting it back into the pixel region to improve light utilization and reduce energy loss.
Solution Approach 2:
The patent implements light recovery by capturing light that would normally be discarded (absorbed by the black matrix) and redirecting it back into the pixel region through the reflection layer. This recovering process increases light utilization efficiency while maintaining the black matrix's essential contrast-improving function.
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 increases light utilization from the backlight, enhancing the overall brightness and contrast ratio of the LCD device, thereby improving image quality.
Implementation Method 1
a black matrix 128 including an organic pattern 123 and a reflection layer 125 formed on two sides of the triangular rib pattern facing the first substrate 110... light incident onto the black matrix 128 is reflected onto the pixel region P
Data Source
AI summary
A color filter substrate includes a transparent substrate, a black matrix arranged on the transparent substrate in horizontal and vertical directions along boundaries of pixel regions, the black matrix including a reflection layer on a surface thereof, and a color filter formed on the black matrix.