Display Panel Laser Highlight Suppression via Photo Sensor Detection
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Solution Overview
Problem
Liquid crystal display panels, such as LEDs and OLEDs, suffer from issues when used with laser pointers, as the high brightness causes absorption of incident light and results in unwanted highlights and bright spots, affecting presentation quality.
Innovation Solution
A display panel design featuring a color filter substrate and a thin film transistor array substrate with integrated photo sensors, light transmissive passages, and control switches, which detect external photoelectric signals to adjust sub-pixel gray scales and improve demonstration effects by determining the laser projection position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the display panel uses high brightness to improve visibility, then the display quality is improved, but the laser pointer light is absorbed and causes unwanted highlights and bright spots
Solution Approach 1:
The patent applies local quality by differentiating the treatment of different display regions. When a laser pointer is detected, only the affected region (where the laser spot is projected) undergoes brightness adjustment, while the rest of the display maintains its normal high brightness. This is achieved by detecting the laser position through photo sensors and selectively adjusting the gray scale values of sub-pixels in the detected region, thus resolving the contradiction between maintaining overall high brightness and eliminating local laser absorption effects.
2Measurement precision
If photo sensors are added to detect laser position, then the laser projection position can be accurately determined, but the device complexity increases
Solution Approach 1:
The patent merges the photo sensor detection function with the existing display pixel structure. The photo sensors are integrated into the display panel substrate, and their detection results are directly used to control the gray scale adjustment of adjacent sub-pixels. This merging approach allows the detection system to share the same physical platform and control circuitry as the display system, thereby achieving accurate laser position detection while minimizing the increase in device complexity.
3Object-affected harmful factors
If sub-pixel gray scale is adjusted to reduce laser highlights, then the presentation quality is improved, but the normal display operation may be affected
Solution Approach 1:
The patent implements periodic action by continuously monitoring the display panel for laser pointer detection and dynamically adjusting sub-pixel gray scales only when laser light is detected. The photo sensors continuously scan for laser positions, and the control system periodically updates the display parameters in response to detected laser spots. This periodic detection and adjustment mechanism ensures that normal display operations are maintained during non-laser periods, while laser highlights are effectively suppressed when needed.
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 panel effectively reduces the impact of laser pointer highlights by adjusting sub-pixel brightness, enhancing presentation quality by accurately determining and addressing the laser projection position, thereby improving the demonstration effect without affecting normal display operations.
Implementation Method 1
The photo sensor is configured for detecting position information corresponding to an external photoelectric signal when receiving the external photoelectric signal
Data Source
AI summary
The invention provides a display panel, including a color filter substrate and a thin film transistor array substrate disposed oppositely, and a liquid crystal layer filled between the color filter substrate and the thin film transistor array substrate, wherein the thin film transistor array substrate includes a display area, a non-display area, and a plurality of photo sensors are disposed in the display area; the color filter substrate is formed with a plurality of light transmissive passages; the thin film transistor array substrate is disposed with a plurality of sub-pixels; and the photo sensor is configured for detecting position information corresponding to an external photoelectric signal when receiving the external photoelectric signal. The display panel is provided with a plurality of photo sensors, when the incident laser light is irradiated onto the photo sensor, the photo sensor can be triggered to work, and the laser projection position is determined.