Textured Touch Display Panel Layout for Stray-Light-Resistant Sensing
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Solution Overview
Problem
Existing display panels face challenges in texture recognition due to weak light reflection from textures and interference from external stray light, affecting the speed and accuracy of texture collection.
Innovation Solution
The display panel incorporates a black matrix layer with light-transmitting openings and a driving circuit layer with light-transmitting portions, allowing light reflected by textures to reach image sensors efficiently while blocking external stray light, enhancing texture collection efficiency and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a black matrix layer with light-transmitting openings is added to block external stray light, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The black matrix layer is divided into multiple regions with different light-transmitting characteristics: first light-transmitting openings for transmitting reflected light from textures, second light-transmitting openings for light emission, and light-shielding portions for blocking stray light. This segmentation allows each region to perform its specific function optimally while resolving the contradiction between blocking stray light and transmitting necessary light.
Solution Approach 2:
The black matrix layer acts as an intermediary component between the light source array and the external environment. It selectively transmits and blocks light based on its patterned structure, serving as a mediator that protects the imaging process from external stray light while allowing necessary light paths to function.
2Measurement precision
If the light-transmitting openings are enlarged to allow more reflected light to reach image sensors, then measurement precision is improved, but object-generated harmful factors increase due to more stray light entering
Solution Approach 1:
Different regions of the black matrix layer have different light-transmitting properties: first light-transmitting openings with specific sizes for transmitting reflected light, second light-transmitting openings for light emission, and light-shielding portions for blocking stray light. This local differentiation allows the system to transmit sufficient reflected light while blocking stray light paths.
Solution Approach 2:
Instead of trying to block stray light by reducing opening sizes (which would reduce reflected light transmission), the patent inverts the approach by using a patterned black matrix layer that selectively blocks stray light paths while maintaining adequate reflected light transmission through strategically positioned openings.
3Productivity
If multiple layers with light-transmitting portions are added to improve light transmission efficiency, then productivity is improved, but device complexity increases
Solution Approach 1:
The black matrix layer performs multiple functions simultaneously: it shields against external stray light, transmits reflected light from textures through first light-transmitting openings, and allows light emission through second light-transmitting openings. This multi-functionality reduces the need for separate layers for each function, improving efficiency while controlling complexity.
Solution Approach 2:
The patent merges the light-shielding function and light-transmission function into a single black matrix layer with a patterned structure. Instead of using separate layers for blocking stray light and transmitting reflected light, both functions are integrated into one layer through strategic positioning of light-shielding portions and light-transmitting openings.
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 design improves texture collection efficiency and accuracy by ensuring sufficient light reaches the image sensors, reducing the impact of stray light, and enabling high-speed and precise texture recognition.
Implementation Method 1
a black matrix layer on a side of the light source array close to the texture touch surface
Implementation Method 2
the plurality of first light-transmitting openings are configured to allow light, which is emitted from at least one of the plurality of light sources, emitted out from at least one of the plurality of second light-transmitting openings, and reflected by the texture, to pass through the plurality of first light-transmitting openings, to reach the plurality of image sensors
Implementation Method 3
reflected by the texture to the image sensors
Data Source
Figure 1~2
Figure 3~4
Figure 5A~5B
AI summary
A display panel and a display apparatus. The display panel has a textured touch surface (S) on a panel surface of the display panel; and comprises a driving circuit layer (110), a light source array (120), an image sensor array (130) and a black matrix layer (140). The light source array (120) comprises a plurality of light sources (121), the image sensor array (130) comprises a plurality of image sensors (131), and the black matrix layer (140) comprises a plurality of first light-transmitting openings (141) and a plurality of second light-transmitting openings (142). The driving circuit layer (110) comprises a plurality of light-transmitting portions (111), wherein each of the plurality of first light-transmitting openings (141) is arranged corresponding to at least one of the plurality of light-transmitting portions (111), and with regard to the first light-transmitting opening (141) and the light-transmitting portion (111) which are arranged correspondingly, the plane size of the first light-transmitting opening (141) in a direction parallel to the panel surface of the display panel is smaller than the plane size of the light-transmitting portion (111) in the direction parallel to the panel surface of the display panel.