Display Driver Circuit OPR-Based Brightness Control
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Solution Overview
Problem
Existing electronic devices struggle to dynamically adjust the brightness of images displayed on their screens based on the on-pixel ratio (OPR), leading to suboptimal brightness levels that can affect image quality and battery efficiency.
Innovation Solution
The electronic device incorporates a display driver circuit that identifies the OPR of an image and adjusts the brightness range accordingly, allowing for adaptive display of images within specific brightness ranges (from a first reference brightness level to a second or third reference brightness level) based on the OPR, using a processor and illuminance sensor to optimize the display settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the display always operates at maximum brightness level, then image quality is maintained, but power consumption increases
Solution Approach 1:
The display brightness is made dynamic rather than static. The display driver circuit continuously monitors the OPR of displayed images and adjusts the brightness level in real-time according to the actual content being displayed. When OPR is low, brightness is reduced; when OPR is high, brightness is maintained or increased, creating a dynamic adaptation system that optimizes both image quality and power consumption.
Solution Approach 2:
The patent changes the brightness parameter based on the OPR parameter. By calculating the ratio of active pixels to total pixels and using this information to modulate the display brightness, the system transforms a fixed parameter (brightness) into a variable one that adapts to content characteristics, thereby reducing power consumption while maintaining perceived image quality.
2Use of energy by moving object
If the display adjusts brightness dynamically based on OPR, then power consumption is reduced, but image quality may deteriorate
Solution Approach 1:
The system implements a feedback mechanism where the display driver circuit continuously monitors the OPR of displayed content and uses this information to adjust brightness levels. This closed-loop control ensures that brightness is reduced only when appropriate (low OPR scenes) while maintaining optimal brightness for high OPR content, preventing image quality deterioration while achieving power savings.
Solution Approach 2:
The display driver circuit performs preliminary calculation of the OPR before displaying the image content. By pre-assessing the brightness requirements based on the image data characteristics, the system can proactively adjust the brightness level to appropriate settings, avoiding both excessive brightness (wasting power) and insufficient brightness (degrading image quality).
Data Source
AI summary
An electronic device is provided. The electronic device includes a display including a display driver circuit and a display panel. The electronic device includes a processor. The display driver circuit is configured to obtain information regarding an image from the processor. The display driver circuit is configured to display, based on an on pixel ratio (OPR) of the image that is a first OPR, the image within a first brightness range from a first reference brightness level to a second reference brightness level greater than the first reference brightness level, through the display panel. The display driver circuit is configured to display, based on the OPR that is a second OPR lower than the first OPR, the image within a second brightness range from the first reference brightness level to a third reference brightness level greater than the second reference brightness level, through the display panel.