Reflecting Layer Aligned With Light-Filtering Sub-Pixels
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Solution Overview
Problem
In display devices, the interchannel cross-color problem between adjacent light-filtering sub-pixels leads to poor light utilization, resulting in limited brightness and display effect due to light absorption by both light-filtering sub-pixels and black matrices, which restricts the improvement of display screen brightness.
Innovation Solution
A display panel design featuring a light-filtering layer with a black matrix and a reflecting layer, where the reflecting layer defines openings aligned with the light-filtering sub-pixels, allowing direct light emission to sub-pixels and reflective light to be redirected, enhancing light utilization and reducing absorption by the black matrix.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a black matrix is disposed at blank spaces among light-filtering sub-pixels to separate them, then interchannel cross-color problem is avoided, but light absorption increases and brightness is limited
Solution Approach 1:
The patent segments the black matrix into multiple parts: a first black matrix layer with first openings aligned to sub-pixels, and a second black matrix layer with second openings. This segmentation allows light to pass through the openings while maintaining color separation, resolving the contradiction between preventing cross-color and allowing sufficient light transmission for brightness.
Solution Approach 2:
The patent introduces a reflective layer as an intermediary between the backlight module and the light-filtering layer. This reflective layer redirects light that would otherwise be absorbed by the black matrix, directing it toward the light-filtering sub-pixels. This mediator enables both color purity (by maintaining black matrix separation) and brightness (by recovering and redirecting absorbed light).
2Reliability
If light-filtering sub-pixels are separated by black matrix, then interchannel cross-color is prevented, but light utilization is reduced
Solution Approach 1:
The patent recovers light that would otherwise be discarded and absorbed by the black matrix. The reflective layer captures light blocked by the black matrix and redirects it to the light-filtering sub-pixels, effectively recovering this lost light energy and improving overall light utilization while maintaining color separation.
3Measurement precision
If black matrix is used to separate light-filtering sub-pixels, then color accuracy is improved, but display effect is poor
Solution Approach 1:
The segmented black matrix structure with aligned openings in both the first and second black matrix layers allows precise color separation while permitting sufficient light transmission. The segmentation creates a pattern that maintains color accuracy by preventing cross-color interference while allowing enough light to reach the sub-pixels for bright display.
Solution Approach 2:
The reflective layer acts as a mediator that enhances display brightness by redirecting light toward the sub-pixels without compromising color accuracy. It compensates for the light blocked by the black matrix, ensuring that sufficient light reaches the light-filtering elements to produce a bright, high-quality display effect.
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 configuration improves light utilization and brightness distribution across the display panel, enhancing the display effect and user perception by optimizing light emission and absorption patterns.
Implementation Method 1
a reflecting layer (50), wherein the reflecting layer, the driving substrate (20), the light-filtering layer (30), and the color film substrate (40) are stacked in sequence from a side away from a backlight module to a side close to the backlight module, and the reflecting layer is located at a side close to a light source
Data Source
AI summary
A display panel and a display device are provided. The display panel includes a light-filtering layer, a color film substrate, a driving substrate, and a reflecting layer. The reflecting layer, the driving substrate, the light-filtering layer, and the color film substrate are stacked in sequence. The light-filtering layer includes a black matrix with multiple second openings, and each of the multiple second openings is filled with one light-filtering sub-pixel. The reflecting layer defines multiple first openings, and each of the multiple first openings is aligned with one second opening.