Display Panel Driving Module Integration for Light Sensing
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Solution Overview
Problem
The integration of a light sensor into display panels requires an additional photosensitive driving chip, leading to increased costs due to the scarcity and expense of these chips.
Innovation Solution
A display panel design that incorporates a detection module and a driving module in the non-display area, with dedicated signal lines that allow the driving module to provide driving signals to the pixel array based on detection signals from the detection module, eliminating the need for an additional photosensitive driving chip.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a light sensor is integrated into the display panel, then functional integration is improved, but device complexity and cost increase due to requiring an additional photosensitive driving chip
Solution Approach 1:
The detection module is merged with the driving module structure, where the detection module includes a detection electrode and the driving module includes a driving electrode. Both modules share the same basic structure and are integrated into the non-display area of the display panel, eliminating the need for separate photosensitive driving chips.
Solution Approach 2:
The driving module is designed to perform multiple functions: it can output driving signals to the pixel array during normal display operation, and it can receive detection signals from the detection module for ambient light sensing. This multi-functional design eliminates the need for dedicated photosensitive driving chips.
2Adaptability or versatility
If a light sensor is integrated into the display panel, then functional integration is improved, but cost increases due to the scarcity and expense of photosensitive driving chips
Solution Approach 1:
The patent replaces expensive, scarce photosensitive driving chips with a cost-effective alternative: the driving module using standard transparent conductive materials like ITO (indium tin oxide) that can be manufactured using existing display panel fabrication processes.
Solution Approach 2:
The driving module serves dual purposes: it performs its primary function of driving the pixel array while simultaneously serving as the interface for the detection module to provide ambient light sensing functionality. This self-service approach eliminates the need for additional dedicated components.
3Reliability
If signal lines are arranged in the display panel, then electrical connectivity is improved, but signal interference may occur between adjacent signal lines
Solution Approach 1:
The patent arranges the detection signal line and driving signal line in different spatial positions within the non-display area, with the detection signal line positioned on one side and the driving signal line on the other side. This spatial separation in the planar dimension reduces electromagnetic interference between the lines.
Data Source
AI summary
Disclosed are a display panel, comprising: a pixel array disposed in the display area; a driving module disposed in the non-display area; a driving signal line, a first end of the driving signal line being connected to the driving module, and a second end of the driving signal line being connected to the pixel array; a detection module disposed in the non-display area; and a detection signal line, a first end of the detection signal line being connected to the driving module, and a second end of the detection signal line being connected to the detection module. An orthographic projection of the detection signal line in a thickness direction of the display panel has no overlap with an orthographic projection of the driving signal line in the thickness direction of the display panel; and a display device.