Photosensitive Display Driving for Accurate Light Intensity Sensing
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Solution Overview
Problem
Existing display technologies face challenges in accurately collecting light intensity signals due to insufficient collection time for photosensitive elements during the light-emitting period, leading to reduced signal accuracy.
Innovation Solution
The display apparatus and method involve controlling sub-pixels in a photosensitive area to be in a non-light-emitting state during the light-emitting period, using inactive pulses with extended durations to ensure photosensitive elements can collect light intensity signals effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If photosensitive elements collect light intensity signals during the light-emitting period, then signal collection can occur, but the collection time is insufficient leading to reduced signal accuracy
Solution Approach 1:
The patent implements periodic light emission control by inserting inactive pulses with specific durations (first duration longer than non-light-emitting period, second duration for other areas) into the light emission control signal during the light-emitting period. This creates periodic intervals where sub-pixels are forced into non-light-emitting state, allowing photosensitive elements to collect light intensity signals without interference from emitted light. The periodic action resolves the contradiction by providing dedicated collection intervals while maintaining overall display functionality.
Solution Approach 2:
The patent divides the display area into multiple regions (first area with photosensitive elements, second area without) and applies different light emission control strategies to each segment. The first area receives inactive pulses with first duration to ensure adequate signal collection time, while the second area receives inactive pulses with second duration. This segmentation allows optimized signal collection in the photosensitive area without compromising display performance in other areas, resolving the time accuracy contradiction.
2Measurement precision
If inactive pulses are inserted to extend non-light-emitting duration, then signal collection accuracy improves, but display frame structure becomes more complex
Solution Approach 1:
The inactive pulses inserted into the light emission control signal serve multiple functions simultaneously: they control the light emission state of sub-pixels, create collection intervals for photosensitive elements, and maintain the overall frame structure. By making the light emission control signal multi-functional, the patent avoids adding separate control mechanisms, thus improving signal accuracy without proportionally increasing system complexity.
Solution Approach 2:
The patent modifies parameters of existing control signals by introducing inactive pulses with specific durations (first duration and second duration) at specific positions within the light-emitting period. This parameter change approach allows the system to achieve extended non-light-emitting duration for accurate signal collection while maintaining compatibility with the existing display frame structure and control architecture.
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
This approach enhances the accuracy of light intensity signal collection, improving the precision of ambient light sensing, fingerprint recognition, and video recording functions by extending the non-light-emitting duration of sub-pixels in the photosensitive area.
Implementation Method 1
each of photosensitive elements in the photosensitive area to collect a light intensity signal of incident light
Data Source
AI summary
The present disclosure provides a driving method and a display apparatus, including: a display panel; a driving circuit electrically connected to the display panel, and the driving circuit is configured to control, in response to the fact that each of sub-pixels in a photosensitive area of the display panel is controlled to be in a non-light-emitting state in a light-emitting period during a preset display frame, each of photosensitive elements in the photosensitive area to collect a light intensity signal of incident light.