Touch Display Panel with Light-Shielding Sensor
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Solution Overview
Problem
Current ambient light sensors in display devices occupy design space, making it difficult to integrate them without narrowing or eliminating the display border, which affects the device's aesthetic and functional performance.
Innovation Solution
A touch display panel design that includes a sensing region with a first and second sensor, where the first sensor is shielded from ambient light by a light-shielding layer, allowing for the collection of dark and bright current values to enhance accuracy and eliminate interference, enabling a narrow border or borderless display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an ambient light sensor is integrated into the display device, then the display device can adapt tone to human luminosity, but the design space is occupied making it difficult to achieve narrow or no border design
Solution Approach 1:
The patent merges the ambient light sensor with the display panel structure by integrating the sensor, light-shielding layer, and control circuitry directly into the display device. The sensor is positioned in the peripheral region surrounding the display region, allowing the sensor functionality to be combined with the display structure without requiring separate external components, thus achieving adaptive tone capability while preserving display border area.
Solution Approach 2:
The patent utilizes the peripheral region surrounding the display region as an additional spatial dimension for sensor placement. Instead of placing the sensor within the active display area, the solution moves the sensor to the peripheral region, effectively using the vertical or lateral space around the display to accommodate the sensor without reducing the display border area.
2Area of stationary object
If the ambient light sensor is integrated without occupying design space, then narrow or no border design is achieved, but the sensor accuracy is reduced due to ambient light interference
Solution Approach 1:
The patent introduces a light-shielding layer as an intermediary component between the ambient light sensor and the display region. This light-shielding layer selectively blocks ambient light from reaching the sensor while allowing the sensor to detect the intended light conditions. The light-shielding layer acts as a mediator that filters out interfering light, thereby maintaining sensor accuracy even when the sensor is integrated in a space-efficient manner.
Solution Approach 2:
The patent applies local quality by creating a specific light-shielded environment around the ambient light sensor. The light-shielding layer is positioned locally over the sensor region, providing selective light blocking only where needed. This localized approach maintains sensor accuracy by preventing ambient light interference at the sensor location while leaving the rest of the display structure unchanged, thus achieving both compact integration and high measurement precision.
3Ease of operation
If sensors are exposed to ambient light, then the sensor can detect light, but dark current and temperature effects reduce measurement accuracy
Solution Approach 1:
The patent implements periodic action by alternately shielding and exposing the ambient light sensor to light. The control circuitry periodically adjusts the light-shielding layer to create shielded and unshielded measurement periods. During shielded periods, dark current measurements are taken; during unshielded periods, ambient light measurements are taken. This periodic switching allows the system to distinguish between dark current effects and actual ambient light signals, thereby improving measurement accuracy while maintaining light detection capability.
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 increases the accuracy of ambient light sensing by isolating sensors from ambient light, reducing the impact of dark current and temperature effects, and allows for a narrow border or borderless display design, improving both functionality and aesthetics.
Implementation Method 1
The light-shielding layer covers the at least one first sensor... the ambient light is prevented from being irradiated to the first sensor
Implementation Method 2
the first sensor and the second sensor may collect a dark current value... and a bright current value... impacts caused by the dark current effect and temperature effect are eliminated
Data Source
AI summary
A touch display panel having a display region, a peripheral region surrounding the display region, and a sensing region located between the display region and the peripheral region is provided. The touch display panel includes a pixel array, a touch electrode, an active device, at least one first sensor, at least one second sensor, and a light-shielding layer. The pixel array is located in the display region. The touch electrode located in the sensing region and the pixel array are separated from each other. The active device coupled to the touch electrode is located in the sensing region. The at least one first sensor and the at least one second sensor are located in the sensing region and separated from each other. The light-shielding layer covers the at least one first sensor.