Transparent Display Brightness Calibration for Full-Screen Uniformity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display panels with notched areas for cameras or sensors cannot achieve full-screen display due to varying brightness levels between transparent and non-transparent areas, leading to inconsistent display quality.
Innovation Solution
A method and apparatus for correcting brightness by adjusting input voltages based on a first curve that aligns the brightness of transparent and non-transparent areas, using photosensitive elements to determine the necessary adjustments, and implementing manual or automatic triggers for the correction process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a notched area is created for camera or sensor integration, then camera function is enabled, but display area is reduced and brightness consistency deteriorates
Solution Approach 1:
The patent uses a photosensitive element to capture the actual brightness distribution across the display panel and creates a digital model (second curve) of the brightness characteristics. This copy of the brightness data is then used to generate correction parameters that compensate for the notched area's impact on display uniformity, enabling full-screen display while maintaining camera functionality.
2Area of stationary object
If transparent display area is used for full-screen display, then display area is increased, but brightness consistency with non-transparent areas deteriorates
Solution Approach 1:
The patent applies different brightness correction parameters to different regions of the display panel. By dividing the display area into transparent and non-transparent regions and applying region-specific correction curves, the system maintains uniform brightness perception across the entire screen while preserving the optical characteristics needed for camera functionality in the transparent area.
Solution Approach 2:
The patent dynamically adjusts the brightness parameters (input voltage-grayscale mapping curves) based on the actual measured brightness distribution. By changing the correction parameters according to the detected brightness characteristics of transparent versus non-transparent areas, the system achieves uniform display output across the full-screen display panel.
3Illumination intensity
If brightness correction is applied to transparent area, then brightness consistency is improved, but display quality may deteriorate due to over-correction
Solution Approach 1:
The patent implements a feedback mechanism where the photosensitive element continuously monitors the actual brightness output of the display panel. This measured brightness data is fed back to the processing unit, which then adjusts the correction parameters accordingly. This closed-loop control prevents over-correction by continuously verifying that the correction is achieving the desired brightness uniformity without degrading display quality.
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
Ensures consistent brightness across the entire display panel, improving the display effect by reducing or eliminating differences between transparent and non-transparent areas, thereby achieving a real full-screen display.
Implementation Method 1
obtaining a light emitting brightness value of the transparent display area through a photosensitive element
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The present application provides methods for correcting brightness of a display panel, and apparatuses for correcting brightness of a display panel. The display panel includes a transparent display area; and a non-transparent display area. The transparent display area is a double-side light emitting display area. A front side of the transparent display area is a side close to ambient light. A back side of the transparent display area is a side away from the ambient light. The method for correcting brightness of a display panel includes: starting a brightness correction process according to a brightness correction starting instruction; obtaining a first curve representing a relationship between absolute values of input voltages of the transparent display area and light emitting brightness values of the transparent display area in a current state; recording the first curve as a relationship curve showing a relationship between absolute values of input voltages and light emitting brightness values of the transparent display area for correcting brightness; and adjusting an input voltage of the transparent display area according to the first curve, so that a front-side light emitting brightness value of the transparent display area is consistent with a light emitting brightness value of the non-transparent display area, or the front-side light emitting brightness value of the transparent display area is restored to a factory default brightness value.