Photosensitive Transistor Layout for Thin Display Panels
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing embedded liquid crystal display panels face a challenge with a longer photosensitive path due to light needing to pass through multiple film layers, which weakens the photosensitive intensity of the photosensitive transistors, especially under weaker laser conditions.
Innovation Solution
The display panel design includes a first substrate with a thin film transistor layer containing photosensitive transistors embedded between color resist blocks, paired with light-shielding support columns and a laser penetrating layer on the second substrate, featuring a photoluminescent layer that emits a specific wavelength when irradiated, reducing the photosensitive path and enhancing signal intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If photosensitive transistors are embedded in the first substrate with multiple film layers, then the display panel achieves an ultra-thin structure, but the photosensitive path becomes longer and photosensitive intensity weakens
Solution Approach 1:
A light-shielding layer is introduced as an intermediary component between the external environment and the photosensitive transistors. This layer selectively blocks ambient light while allowing laser light to pass through, thereby protecting the photosensitive transistors from interference and enhancing their photosensitive intensity without increasing the overall panel thickness.
Solution Approach 2:
The light-shielding layer is positioned specifically above the photosensitive transistors rather than uniformly across the entire display panel. This localized shielding approach ensures that only the necessary areas are protected, maintaining the ultra-thin structure while providing targeted enhancement to photosensitive intensity where needed.
2Length of stationary object
If multiple film layers are used in the embedded structure, then the display panel achieves thinness, but color mixing occurs and photosensitive precision decreases
Solution Approach 1:
The light-shielding layer serves as a mediator that filters out ambient light before it reaches the photosensitive transistors. By blocking unwanted light wavelengths and directions, this intermediary layer prevents color mixing and ensures that only laser light signals are detected, thereby improving measurement precision.
Solution Approach 2:
The light-shielding layer modifies the optical parameters of the environment surrounding the photosensitive transistors by selectively absorbing or reflecting ambient light. This parameter change in the optical environment enhances the contrast between laser light and ambient light, improving the precision of laser sensing.
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 configuration results in an ultra-thin display panel with improved photosensitive signal intensity by directly exposing photosensitive transistors to the laser penetrating and photoluminescent layers, reducing the impact of multiple film layers and preventing color mixing.
Implementation Method 1
featuring a photoluminescent layer that emits a specific wavelength when irradiated
Implementation Method 2
when laser irradiates on the photosensitive transistors (sensor TFTs), the photosensitive transistors will generate currents
Data Source
AI summary
A display panel and a display device are disclosed. The display panel includes drive transistors and photosensitive transistors disposed in a same layer of a first substrate. Each of the photosensitive transistors is correspondingly disposed in a gap between at least two adjacent color resist blocks. A plurality of pairs of first light-shielding support columns are disposed between the first substrate and a second substrate, a first end thereof is connected to the first substrate, and a second end thereof is connected to the second substrate. Wherein, each pair of the first light-shielding support columns is disposed corresponding to each of the photosensitive transistors by one to one.