Up-conversion Display Substrate Eliminates Color Filters
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing TFT-LCD displays have high production costs due to the use of resin sheets for color filters, leading to low light utilization efficiency, lower display brightness, higher power consumption, smaller color gamut, and light leakage.
Innovation Solution
A display substrate with light-emitting units made of up-conversion materials (NaF doped with Y3+, Yb3+, Ce3+, Ho3+, and Tm3+) that emit red, green, and blue light when irradiated with infrared light, eliminating the need for color filters and utilizing self-luminescence for color display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If resin sheet color filters are used in TFT-LCD, then color display is achieved, but production cost increases and light utilization efficiency decreases
Solution Approach 1:
The patent extracts and removes the resin sheet color filter layer from the traditional TFT-LCD structure. Instead of using color filters to achieve color display, the invention uses color conversion materials that directly convert backlight spectrum to desired colors, eliminating the need for resin sheets and their associated costs while improving light transmission.
Solution Approach 2:
The patent changes the optical parameters of the display system by replacing absorbing color filters with converting color conversion materials. This parameter change transforms the light interaction mechanism from absorption to conversion, improving light utilization efficiency while reducing material costs.
2Illumination intensity
If resin sheet color filters are used to achieve color display, then color filtering is accomplished, but light transmittance decreases and power consumption increases
Solution Approach 1:
The patent converts the harmful light absorption effect of color filters into a beneficial color conversion process. By using color conversion materials that transform backlight wavelengths rather than absorbing them, the system improves display brightness and reduces the power needed to achieve the same visual output.
3Illumination intensity
If traditional color filter structure is used, then color display is achieved, but color gamut and color saturation are limited
Solution Approach 1:
The patent employs composite color conversion materials with specific optical properties to expand the color gamut. These composite materials are integrated into the display structure to achieve wider color range and higher saturation without significantly increasing structural complexity.
4Reliability
If backlight filtering through color filters is used, then color display is achieved, but light leakage occurs
Solution Approach 1:
The patent removes the traditional color filter layer that causes light leakage issues. By replacing it with color conversion materials, the system achieves better light control and reduces unwanted light leakage while maintaining color display functionality.
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 reduces production costs, enhances light utilization efficiency, increases color gamut and saturation, and minimizes power consumption and light leakage by using self-luminescent units that emit light directly, rather than relying on backlight filtering.
Implementation Method 1
each of which is made of an up-conversion material, and is used for emitting light with a corresponding color when a light irradiates on it. Wherein, said light is infrared light.
Data Source
AI summary
The present invention provides a display substrate, a display panel and a display device. Said display substrate comprises multiple kinds of light-emitting units, each of which is made of an up-conversion material, and is used for emitting light with a corresponding color when a light irradiates on it. The display substrate above can reduce cost, display a wider color gamut and a higher color saturation, and can achieve higher light utilization efficiency, thereby can reduce power consumption, and furthermore, can reduce or avoid light leakage.