Display Substrate Light Guiding Cover Layer Luminance
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Solution Overview
Problem
Liquid crystal display devices face reduced luminance when an upper cover glass plate or touch screen is used, which affects the visual effect, and increasing backlight luminance complicates heat dissipation.
Innovation Solution
A display substrate with a light-transmitting cover layer that concentrates and transmits incident light at an angle less than 90 degrees to the substrate, utilizing light conducting and shielding portions to enhance light utilization and luminance, acting as a black matrix to internally direct light to pixel units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an upper cover glass plate or touch screen is used, then the display device is more complete and functional, but luminance is greatly reduced
Solution Approach 1:
The patent introduces a light guiding member as an intermediary component between the backlight and the pixel units. This light guiding member refracts and directs light at specific angles (less than 90 degrees relative to the substrate plane), enabling light to pass through the cover glass and touch screen while maintaining high luminance. The intermediary structure allows light to be concentrated and directed through the additional functional layers without significant luminance loss.
2Illumination intensity
If backlight luminance is increased to compensate for cover glass loss, then display luminance is improved, but heat dissipation difficulty increases
Solution Approach 1:
The patent changes the light transmission parameter by using a light guiding member that refracts light at specific angles (less than 90 degrees relative to the substrate plane). This parameter change in light direction and concentration allows the system to achieve high display luminance without increasing backlight intensity, thereby avoiding the associated heat generation and dissipation problems.
3Ease of manufacture
If light is transmitted vertically through the cover layer, then light transmission is simple, but light utilization efficiency is low
Solution Approach 1:
The patent employs a light guiding member with a curved or angled structure (having a light guiding surface inclined at less than 90 degrees to the substrate plane). This curved/angled geometry refracts light in a controlled manner, directing it at optimal angles through the cover layer. The non-linear light path achieved through this geometric principle improves light utilization efficiency while maintaining manufacturing feasibility.
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
Improves display luminance by optimizing light utilization and distribution within the display device, addressing the issue of reduced luminance while maintaining effective heat dissipation.
Implementation Method 1
The cover layer is configured to enable light incident from a side of the substrate body to the cover layer to be concentrated inside the cover layer and transmitted, and pass through the cover layer in a first direction, an angle between the first direction and a preset plane is less than a preset angle
Implementation Method 2
each light guiding member includes a light concentrating member and a light reflecting member, and the light reflecting member is arranged on a side of the light concentrating member away from the substrate body
Data Source
AI summary
A display substrate, a display panel, and a display device are provided. The display substrate includes a substrate body capable of transmitting light and a cover layer arranged on the substrate body to form a predetermined pattern, a plurality of pixel unit spaces are in the predetermined pattern. Light incident from a side of the substrate body to the cover layer is concentrated inside the cover layer and transmitted, and passes through the cover layer in a first direction, an angle between the first direction and a preset plane is less than a preset angle, the preset plane is parallel to the substrate body, the preset angle is less than 90 degrees.