Color Filter Transparent Structure Light Loss Reduction
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Solution Overview
Problem
Conventional LCD and AMOLED displays experience significant light loss due to the need for a backlight module or self-eliminating light source, with blue light potentially damaging human eyes, and existing color filters do not effectively reduce this loss.
Innovation Solution
A color filter with a transparent structure, including periodically arranged color resistors and light blocking layers, and strategically placed vias and blind vias to minimize light transmission loss by allowing ambient light to bypass certain areas, thereby enhancing incident and outgoing light efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If ambient light passes through multiple stacked layers (polarizer, color filter layer, liquid crystal layer) in RLCD, then reflection and lighting function is achieved, but light loss increases and incident/outgoing light efficiency decreases
Solution Approach 1:
The color filter layer is divided into multiple color regions (red, green, blue color resistors) with distinct functions. Each color resistor region is further segmented to include transparent areas and light blocking areas, allowing selective light transmission. This segmentation enables different parts of the color filter to perform different functions, reducing overall light loss while maintaining color display capability.
Solution Approach 2:
Different regions of the color filter layer are assigned different optical properties. The color resistors have selective light absorption characteristics for their respective colors, while transparent regions allow full light transmission. Light blocking layers are strategically positioned to prevent unwanted light transmission. This local differentiation of optical properties optimizes light efficiency across the entire display.
2Reliability
If conventional color filter structure is used, then manufacturing simplicity is maintained, but light transmission efficiency remains low
Solution Approach 1:
The color filter layer is segmented into multiple functional regions including color resistors, transparent regions, and light blocking layers. Each segment serves a specific optical function, allowing the overall structure to achieve high light transmission efficiency through coordinated operation of its parts.
Solution Approach 2:
The patent introduces a vertical dimension to the color filter structure by stacking multiple layers (color filter layer, light blocking layer, transparent structure) with different optical properties. This multi-layer vertical arrangement enables complex light management functions that cannot be achieved with a single-plane structure, improving light transmission efficiency while maintaining manufacturability.
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 color filter design significantly reduces light loss and increases light efficiency by optimizing the path of ambient light through the display panel, improving the overall performance of reflection LCDs without the need for a backlight module.
Implementation Method 1
The color filter located in a reflection area of the substrate has a plurality of light holes symmetrically distributed with the alignment bump as the center
Implementation Method 2
The reflection layer could absorb and reflect ambient light for lighting purposes
Data Source
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AI summary
A color filter, a display panel, and a display device are provided. The color filter includes a substrate, a plurality of color resistors, and a color blocking layer. The plurality of color resistors are arranged in a matrix on the substrate. Two adjacent color resistors have an interval in-between. The color blocking layer is placed in the interval. A transparent structure is placed on each of the color resistors. This could reduce the transmission loss of the light and thus raises the incident/outgoing light efficiency.