Under-Display Camera Luminance Compensation via Pixel Structure Segmentation
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Solution Overview
Problem
Display apparatuses face luminance ununiformity issues due to the presence of cameras or sensors under the display panel, leading to differences in luminance between normal and camera/sensor areas, which existing compensation methods fail to address effectively over time.
Innovation Solution
Incorporating a camera or photo sensor under the display panel to determine and compensate for luminance differences by capturing data in specific areas and adjusting grayscale values to match luminance levels between normal and camera/sensor areas, using a luminance compensator to adjust image data in real time without additional devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a camera or sensor is located under the display panel to enable additional functions, then the functionality of the display apparatus is improved, but luminance ununiformity is generated between normal areas and camera/sensor areas
Solution Approach 1:
The patent applies local quality by creating a dedicated compensation area with a different pixel structure than the normal display area. This compensation area, located where the camera or sensor is positioned, has modified pixel characteristics to match the luminance output of surrounding normal areas, thereby eliminating luminance ununiformity while preserving the camera/sensor functionality underneath the display panel.
2Adaptability or versatility
If transmission areas are formed in the display panel for camera or sensor operation, then the camera or sensor can function properly, but luminance ununiformity of the image on the display panel is generated
Solution Approach 1:
The patent implements local quality by designing a compensation area with modified pixel structure that compensates for the light transmission required by the camera or sensor. The compensation area's different pixel configuration allows it to produce matching luminance levels despite the underlying camera/sensor transmission needs, thus maintaining both camera operation and display uniformity.
3Illumination intensity
If the pixel structure in the camera area is different from the normal area to compensate for luminance differences, then luminance ununiformity is reduced, but the device structure becomes more complex
Solution Approach 1:
The patent applies segmentation by dividing the display panel into distinct functional areas: normal display areas with standard pixel structures and a compensation area with modified pixel structures. This segmentation allows each area to be optimized for its specific function while working together to achieve overall luminance uniformity, managing complexity through functional zonation rather than uniform design.
Solution Approach 2:
The patent implements local quality by creating a compensation area with a specialized pixel structure that differs from the normal display areas. This localized structural modification is applied only where needed (under the camera/sensor) to achieve luminance matching, rather than redesigning the entire display panel, thus managing complexity through targeted local optimization.
4Illumination intensity
If existing compensation methods are used to address luminance differences, then some luminance compensation is achieved, but the compensation is not effective over time
Solution Approach 1:
The patent applies preliminary action by pre-configuring the compensation area with a specific pixel structure designed to match the luminance characteristics of normal display areas. This structural compensation is built into the display panel before operation, providing inherent, time-stable luminance uniformity that does not rely on dynamic adjustment mechanisms that may degrade over time.
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 display quality by compensating luminance differences in real time during power-on or power-off periods, ensuring consistent luminance across the display panel without the need for external compensation devices.
Implementation Method 1
determine a luminance of a first area and a luminance of a second area using captured data captured by the camera
Data Source
AI summary
A display apparatus includes: a display panel comprising a first area having a first pixel structure and a second area having a second pixel structure different from the first pixel structure; a camera under the display panel and corresponding to the second area of the display panel; and a luminance compensator configured to determine a luminance of the first area and a luminance of the second area using captured data captured by the camera and configured to compensate image data applied to the display panel.