Flexible Display Brightness Compensation via Pixel Detection
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Solution Overview
Problem
Flexible display devices experience uneven brightness due to changes in display brightness when bent or folded, and local transparent display areas have lower brightness than other areas, leading to overall uneven brightness.
Innovation Solution
A display device with a brightness detecting unit group on the light emitting side, comprising multiple brightness detecting units that overlap with display units, and a control module to determine actual brightness data and apply brightness compensation when it differs from target data, using a photosensitive layer and switching transistors to accurately detect and adjust brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display device is bent or folded to achieve flexibility, then adaptability is improved, but brightness uniformity deteriorates
Solution Approach 1:
The display panel is divided into multiple pixel units, each equipped with its own brightness detecting unit. This segmentation allows independent brightness detection and compensation for each pixel, enabling the display to maintain uniform brightness even when bent or folded, thus resolving the contradiction between flexibility and brightness uniformity.
Solution Approach 2:
A brightness compensation mechanism is implemented where the brightness detecting unit continuously monitors the actual brightness of each pixel and feeds back to the control unit. The control unit then adjusts the driving signals to compensate for brightness variations caused by bending or folding, maintaining overall brightness uniformity while preserving display flexibility.
2Manufacturing precision
If pixel density is increased in transparent display areas to achieve higher resolution, then manufacturing precision is improved, but brightness deteriorates
Solution Approach 1:
The patent implements different display structures for different regions: transparent display areas use a optimized pixel structure with adjusted electrode arrangements and material compositions that balance pixel density and light transmission. This local optimization allows high pixel density in transparent areas while maintaining adequate brightness through specialized material selection and structural design.
Solution Approach 2:
The patent adjusts key parameters in transparent display areas including electrode transparency, pixel pitch, and material properties to optimize the balance between pixel density and brightness. By changing these parameters locally in transparent regions, the patent achieves high resolution without sacrificing brightness in areas where light transmission is critical.
3Illumination intensity
If brightness detecting units are added to detect actual brightness for compensation, then brightness uniformity is improved, but device complexity increases
Solution Approach 1:
The brightness detecting unit is merged with the display pixel structure itself, using the same transparent electrode and photosensitive layer for both display and detection functions. This integration eliminates the need for separate detection components, reducing overall device complexity while still achieving brightness uniformity through the combined display-detection-p compensation mechanism.
Solution Approach 2:
The transparent electrode and photosensitive layer serve dual functions: they are part of the display structure that emits light, and simultaneously act as the detection mechanism that senses brightness. This multi-functionality reduces the number of separate components needed, lowering device complexity while maintaining the capability to detect and compensate brightness variations.
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 uniform brightness across the display device by detecting actual brightness and applying compensation, effectively addressing the issue of uneven brightness caused by bending, folding, and high pixel density in transparent areas.
Implementation Method 1
each of the brightness detecting units includes a first electrode, a photosensitive layer, and a second electrode which are sequentially disposed in a direction away from the display layer... acquire current output by each of brightness detecting units... to determine the actual brightness data
Data Source
AI summary
A display device includes a display layer, at least one brightness detecting unit group disposed on a light emitting side of the display layer, and a control module coupled to each of the brightness detecting units. The display layer includes a plurality of display units. Each display unit includes at least one sub-pixel. Each brightness detecting unit group includes a plurality of brightness detecting units, an orthographic projection of one brightness detecting unit on the display layer has an overlapping area with an arranging area of one display unit on the display layer. Respective portions, lying in overlapping areas, of the display units corresponding to different brightness detecting units in the same brightness detecting unit group are the same.