Photosensitive Unit in Array Substrate for Backlight Monitoring
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Solution Overview
Problem
In-vehicle display screens often experience abnormal backlight brightness, leading to drivers being unable to recognize critical information, which can result in irreparable losses due to the lack of timely monitoring solutions for such issues.
Innovation Solution
A display module with an array substrate at the light-exiting side of the backlight module, featuring gate lines, data signal lines, and a photosensitive unit positioned to sense luminous brightness, allowing for timely detection and warning of abnormal backlight conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a photosensitive unit is added to monitor backlight brightness, then the reliability of the display system is improved, but the device complexity increases
Solution Approach 1:
The photosensitive unit is integrated into the array substrate structure, merging the monitoring function with the existing display substrate. This combination allows the photosensitive unit to share the substrate's manufacturing process and structural support, adding monitoring capability without proportionally increasing overall device complexity
Solution Approach 2:
The array substrate serves dual functions: it acts as both the display structure carrier and the platform for the photosensitive monitoring unit. By making the substrate universal for both display and monitoring purposes, the patent avoids needing a separate dedicated monitoring substrate, thereby improving reliability while controlling complexity
2Measurement precision
If the photosensitive unit is disposed at the non-opening region, then the measurement precision of backlight brightness is improved, but the area available for sensing is reduced
Solution Approach 1:
The patent places the photosensitive unit specifically in the non-opening region where light paths are more controlled and predictable. This localized positioning provides more precise measurements of backlight brightness by avoiding the optical interference that would occur in opening regions, while the reduced sensing area is compensated by the higher quality of light received in this specific location
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 solution enables accurate and timely monitoring of backlight brightness, preventing potential hazards and losses by providing prompt warnings when abnormal conditions occur, ensuring safer and more reliable operation of in-vehicle display systems.
Implementation Method 1
the photosensitive unit converts an optical signal to an electrical signal and transmits the electrical signal to a first capacitor connected in parallel with the photosensitive unit
Data Source
AI summary
A display module and a method for monitoring backlight brightness are provided in the present disclosure. The display module includes a display region including an opening region and a non-opening region. The display module includes a backlight module and an array substrate. The array substrate is at a light-exiting side of the backlight module. The array substrate includes a plurality of gate lines which extends along a first direction and is arranged along a second direction, and further includes a plurality of data signal lines which is arranged along the first direction and extends along the second direction. The array substrate further includes a first substrate and at least one photosensitive unit, where the photosensitive unit is at a side of the first substrate away from the backlight module; and the photosensitive unit is disposed at the non-opening region for sensing a luminous brightness of the backlight module.