Array Substrate Photo-Sensor for LCD Brightness Adaptation
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Solution Overview
Problem
Conventional liquid crystal display (LCD) panels struggle to automatically adjust display contrast according to external environment brightness, leading to issues with image clarity and eye comfort.
Innovation Solution
Incorporating a photo-sensor on the array substrate of the display panel, which allows for intelligent adjustment of display brightness and contrast by perceiving external light changes, using a thin-film transistor and photo-sensor structure with a color filter layer formed via a COA technique to enhance aperture ratio and space efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a photo-sensor is added to the array substrate to enable automatic brightness adjustment, then adaptability to external environment is improved, but device complexity increases
Solution Approach 1:
The photo-sensor is integrated directly into the array substrate structure, merging the sensing function with the display substrate. This integration approach combines multiple functions (display and environmental sensing) into a single device, improving adaptability while minimizing the increase in overall device complexity through structural consolidation
Solution Approach 2:
The array substrate is designed to serve multiple functions: it acts as both the display structure and the platform for the photo-sensor. This multi-functionality allows the same substrate to perform both display and environmental sensing tasks, thereby improving adaptability without proportionally increasing device complexity
2Area of moving object
If the color filter layer is formed using COA technique, then aperture ratio is improved, but manufacturing precision requirements increase
Solution Approach 1:
The color filter layer is formed on the array substrate before the black matrix layer in the COA technique process sequence. This preliminary action allows the color filter to define the aperture areas first, enabling better control over the aperture ratio while simplifying subsequent manufacturing steps
Solution Approach 2:
The COA technique changes the processing parameters and sequence compared to conventional methods. By forming the color filter layer with specific material properties and deposition parameters before the black matrix, the technique achieves improved aperture ratio while managing manufacturing precision through controlled parameter changes
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 display device can automatically optimize brightness and contrast, preventing images from being too dark or overly bright, thereby improving viewing experience and display performance.
Implementation Method 1
a photo-sensor is disposed corresponding to the display region... the brightness of the external environment of the display region can be perceived through the photo-sensor
Data Source
AI summary
A display panel, a method of manufacturing a display panel, and a display device are provided. The display panel includes an array substrate and a color filter layer on the array substrate. The array substrate includes a display region and a non-display region. The display region includes a photo-sensor.