Reflective Pixel Unit for Brightness Loss in Displays
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional reflective display screens face significant brightness loss due to the use of transmissive color filters, which absorb unwanted wavelengths and attenuate light, resulting in a dark and less vibrant display.
Innovation Solution
A reflective pixel unit is designed with a reflective filter layer that reflects a portion of visible light within a specific range while allowing another portion to pass through, reducing light attenuation and incorporating a scattering element to enhance light distribution and visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a transmissive color filter is used to filter white light and render colors, then color display is achieved, but light brightness is greatly reduced resulting in a dark picture
Solution Approach 1:
The patent inverts the conventional transmissive color filter approach by using a reflective color filter layer that reflects unwanted wavelengths and allows desired wavelengths to pass through. This inversion changes the mechanism from absorbing light (transmissive) to reflecting light (reflective), thereby maintaining brightness while achieving color display.
Solution Approach 2:
The patent changes the optical parameter of the filter layer from transmissive to reflective mode. By modifying the filter layer's optical properties to reflect rather than absorb light, the system maintains color selection capability while significantly improving light transmission and brightness.
2Manufacturing precision
If a color filter absorbs unwanted wavelengths to render colors, then color purity is improved, but light attenuation increases making the display darker
Solution Approach 1:
The patent converts the harmful effect of light absorption into a beneficial reflective mechanism. Instead of absorbing unwanted wavelengths (which causes energy loss), the reflective filter layer reflects these wavelengths away while allowing desired wavelengths to pass through, thus converting the potential energy loss into a brightness-preserving color selection method.
3Ease of manufacture
If light passes through the color filter to reach the reflective plate, then color selection is achieved, but brightness is reduced due to multiple transmissions
Solution Approach 1:
The patent segments the color selection function into two distinct components: the reflective filter layer handles wavelength selection by reflection, while the reflective plate handles the reflection of desired wavelengths. This segmentation allows each component to perform its function efficiently without the brightness loss associated with multiple transmissions through a single filter layer.
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 solution improves display brightness by minimizing light loss and preventing picture quality degradation from external light exposure, resulting in a more visible and vibrant image.
Implementation Method 1
The reflective filter layer is configured such that a surface of the reflective filter layer facing away from the reflective plate receives visible light and reflects a part of light having wavelengths within a specific range in the visible light
Implementation Method 2
allows another part of the light having wavelengths within the specific range to pass through the reflective filter layer to the reflective plate
Implementation Method 3
The reflective filter layer comprises a scattering element. The scattering element comprises the surface of the reflective filter layer facing away from the reflective plate. The surface of the reflective filter layer facing away from the reflective plate comprises protrusions and recesses.
Data Source
AI summary
A reflective pixel unit, a reflective display panel and a display apparatus are disclosed. The reflective pixel unit includes a substrate, a reflective plate on the substrate, and a reflective filter layer on a side of the reflective plate facing away from the substrate. The reflective filter layer is configured such that a surface of the reflective filter layer facing away from the reflective plate receives visible light and reflects a part of light having wavelengths within a specific range in the visible light, and allows another part of the light having wavelengths within the specific range to pass through the reflective filter layer to the reflective plate. The reflective plate is configured to reflect the another part of the light having wavelengths within the specific range passed through the reflective filter layer.