Integrated Light Detection Substrate for Compact Display Brightness Control
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Solution Overview
Problem
Mobile terminal devices require a display apparatus that can adjust brightness based on external light intensity while maintaining a small size and high portability, without increasing the size of the display apparatus.
Innovation Solution
A display apparatus with integrated light detection means using a thin film transistor on the same substrate as the image display means, which controls luminance based on detected light intensity, eliminating the need for separate photo-sensors and allowing for efficient fabrication and reduced size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate photo-sensor is used for light detection, then light intensity detection capability is improved, but device size increases
Solution Approach 1:
The patent merges the light detection function with the existing thin film transistor substrate by forming a light detection element using the same thin film transistor structure that is already present in the display panel. This integration eliminates the need for separate photo-sensors while maintaining light detection capability, thereby resolving the contradiction between detection precision and device size.
Solution Approach 2:
The thin film transistor substrate is designed to serve dual purposes: as the active element for the display panel and as the light detection element. By making the substrate multi-functional, the patent avoids adding extra components for light detection, thus preventing device size increase while achieving the required measurement precision.
2Illumination intensity
If backlight brightness is adjusted for various environments, then image display quality under different lighting conditions is improved, but device complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where the light detection element continuously monitors ambient light intensity and automatically adjusts the backlight brightness accordingly. This closed-loop control system improves image display quality under various lighting conditions while keeping the control logic simple, thus resolving the contradiction between display quality and device complexity.
Solution Approach 2:
The display system performs self-adjustment of backlight brightness based on ambient light conditions detected by the integrated light detection element. This self-service capability eliminates the need for complex manual control mechanisms or additional control circuits, thereby improving display quality without significantly increasing device complexity.
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
Enables good image display under various environments by adjusting luminance in response to light intensity, maintaining a compact and lightweight design, and enhancing detection reliability through multiple-point light intensity measurement.
Implementation Method 1
light detection means for detecting the intensity of light in the image display region or in the proximity of the image display region using a thin film transistor formed on the same substrate as that of the image display means
Data Source
AI summary
A display apparatus is provided which includes a display element section (2) for displaying an image in an image display region, a light detection sensor (3) for detecting the intensity of light in the image display region or in the proximity of the image display region using a thin film transistor formed on the same insulating substrate (1) as that of the display element section (2), and a light control circuit (5) for controlling the luminance when the display element section (2) displays an image based on a result of the detection by the light detection sensor (3).Since the light intensity is detected by the light detection sensor (3) using the thin film transistor formed on the same insulating substrate (1) as that of the display element section (2), such a situation that the scale of the apparatus increases for light intensity detection can be prevented while good image display under various environments is made possible.