Composite Pixel Units for Full-Screen Ambient Light Sensing
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Solution Overview
Problem
Conventional display panels face challenges in achieving full-screen functionality due to the occupation of effective display area by ambient light sensors, which are typically placed in non-display areas, and struggle to balance brightness adjustment with power consumption.
Innovation Solution
Integrating optical detection modules, such as phototransistors, into composite pixel units within the display panel, allowing for ambient light sensing without occupying display area, and using a control circuit to adjust brightness based on detected signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an ambient light sensor is disposed in a non-display area of the display panel, then the display panel can sense ambient light to adjust brightness and reduce power consumption, but the effective display area proportion is reduced making it difficult to realize full screen
Solution Approach 1:
The patent merges the ambient light sensing function with the display pixel structure by integrating a phototransistor into the composite pixel unit. This allows the sensor to be embedded within the display area rather than occupying separate non-display area, thereby maintaining full-screen display while enabling ambient light sensing for brightness adjustment and power consumption reduction
Solution Approach 2:
The composite pixel unit is designed to perform multiple functions: it serves as both a display element (through the pixel electrode and pixel transistor) and an ambient light sensor (through the integrated phototransistor). This multi-functionality eliminates the need for separate sensor components, achieving full-screen display while providing ambient light sensing capability
2Measurement precision
If the display panel occupies more area for sensing components, then ambient light detection accuracy can be improved, but the display area proportion is reduced
Solution Approach 1:
The phototransistor is integrated into the composite pixel unit structure, merging the sensing function with the display element. This integration allows the sensor to be distributed across the display area rather than concentrated in a separate region, maintaining detection accuracy while preserving full-screen display proportions
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 true full-screen display by maintaining effective display area proportions while automatically adjusting brightness according to ambient light conditions, reducing power consumption and enhancing user experience.
Implementation Method 1
the optical detection part includes a phototransistor
Data Source
AI summary
A display panel, a driving method and a manufacturing method thereof, and a display device are provided. The display panel includes pixel units arranged in an array. Each pixel unit includes a display pixel part, and at least a part of the pixel units are configured to be composite pixel units; each of the composite pixel units further includes an optical detection part; the optical detection part is configured to execute optical signal acquisition operation; and the display pixel part is configured to execute display operation.