Vehicle LCD Panel Reflective Interface Layout for Full-Black Uniformity
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Solution Overview
Problem
Current liquid crystal display screens cannot achieve a full black display due to differences in light reflectivity between the infrared camera setting area and the display area, caused by the removal of film layers to accommodate the camera.
Innovation Solution
The liquid crystal display panel is designed with a greater number of reflective interfaces formed by adjacent insulating layers of different refractive indices in the functional area compared to the display area, which improves the reflectivity of the functional area without affecting infrared optical transmittance, thereby reducing the brightness difference between the two areas when displayed in black.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If film layers are removed in the functional area to improve infrared light transmittance, then infrared transmission is improved, but brightness uniformity deteriorates due to reflectivity difference
Solution Approach 1:
The patent applies local quality by creating different numbers of reflective interfaces in different areas of the display panel. The functional area is designed with a greater number of reflective interfaces compared to the display area, allowing each area to have optimized properties for its specific function while maintaining overall brightness uniformity.
Solution Approach 2:
The patent changes the parameter of reflective interface quantity in the functional area to compensate for the removed film layers. By adjusting the number of reflective interfaces formed by adjacent insulating layers with different refractive indices, the reflectivity of the functional area is increased to match the display area, thereby maintaining brightness uniformity.
2Adaptability or versatility
If multiple film layers are removed in the functional area, then infrared camera performance is improved, but light reflectivity difference between areas increases
Solution Approach 1:
The patent makes the functional area structurally different from the display area by providing a greater number of reflective interfaces in the functional area. This local differentiation allows the functional area to maintain appropriate reflectivity despite having fewer film layers, enabling infrared camera functionality while preserving overall reflectivity consistency.
Solution Approach 2:
The patent introduces asymmetry in the structure of the functional area compared to the display area. The functional area has a greater number of reflective interfaces formed by adjacent insulating layers, creating an asymmetric design that compensates for the removed film layers and maintains reflectivity consistency across different areas.
3Stability of the object's composition
If the number of reflective interfaces is increased in the functional area, then brightness uniformity is improved, but device complexity increases
Solution Approach 1:
The patent merges the function of creating reflective interfaces with the existing insulating layers in the functional area. By utilizing adjacent insulating layers with different refractive indices that are already present in the multi-layer structure, the patent increases reflective interfaces without adding separate components, thereby improving brightness uniformity while minimizing increases in 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
This design enhances the brightness uniformity of the liquid crystal display panel by increasing the reflectivity of the functional area, effectively eliminating the brightness difference with the display area when in a completely black state.
Implementation Method 1
a number of reflective interfaces formed by adjacent insulating layers of different refractive indices located in the functional area is greater than a number of adjacent reflective interfaces with different refractive indices located in the display area
Data Source
AI summary
A liquid crystal display panel and a vehicle-mounted liquid crystal display device are provided. In the liquid crystal display panel, in an array substrate and/or a color filter substrate, a number of reflective interfaces in a functional area is greater than a number of reflective interfaces in a display area. Under the condition that an infrared optical transmittance is not affected, a reflectivity of light in the functional area is improved compared to the display area. This reduces or even eliminates a brightness difference between the functional area and the display area when a display is completely black.