Transparent Display Pixel Circuit for High Transmittance
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Solution Overview
Problem
Current methods for increasing the Screen-to-Body Ratio of mobile terminals, such as reducing border areas or using curved screens, have limitations in further improving this ratio without compromising the normal operation of optical detectors and cameras, and affecting display quality.
Innovation Solution
A display circuit with differently structured pixel circuits for normal and transparent display areas, where the transparent area has higher transmittance and includes an optical detector and camera, and a luminance compensation method to ensure equal luminance across both areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional pixel circuit structure is used in the transparent display area, then the display function is maintained, but the transmittance is reduced and cannot be disposed for optical detectors and cameras
Solution Approach 1:
The patent applies different pixel circuit structures to different display areas: the normal display area uses a complete pixel circuit with driving transistors and storage capacitors, while the transparent display area uses a simplified pixel circuit with fewer components. This local differentiation allows the transparent area to achieve high transmittance while maintaining basic display functionality, resolving the contradiction between transmittance and display function.
2Area of stationary object
If the border of the mobile terminal is reduced to increase Screen-to-Body Ratio, then the Screen-to-Body Ratio is improved, but the normal operation of optical detectors and cameras is affected
Solution Approach 1:
The patent creates a localized transparent display area with optimized transmittance properties, allowing optical detectors and cameras to be disposed behind this specific region without affecting their operation. This local quality enhancement enables the border to be reduced or removed while maintaining the functionality of optical components, thus increasing Screen-to-Body Ratio without compromising detector and camera operation.
3Illumination intensity
If the number of components in the pixel circuit is reduced to increase transmittance, then the transmittance is improved, but the display quality may be affected
Solution Approach 1:
The patent maintains high display quality in the transparent area by carefully selecting which components to retain (data writing circuit, lighting control circuit, storage capacitor) and which to remove (reset circuit, compensation circuit). The retained components are sufficient to maintain picture quality, while their reduced number and optimized layout achieve high transmittance, resolving the contradiction between component reduction and display quality.
Solution Approach 2:
The patent applies partial action by implementing only the necessary components for basic display functionality in the transparent area, rather than the complete set of components used in the normal display area. This partial implementation achieves the desired transmittance while maintaining adequate display quality for the transparent region's specific requirements.
Data Source
AI summary
A display screen, a display device, a display circuit used for the display screen and a brightness compensation method therefor. The display screen (10) includes a normal display area (11) and a transparent display area (12). The display circuit (20) includes: a first pixel circuit (21), wherein the first pixel circuit is arranged at the normal display area; and a second pixel circuit (22), wherein the second pixel circuit is arranged at the transparent display area. The structure of the first pixel circuit is different from that of the second pixel circuit, so that the light transmittance of the transparent display area is higher than the light transmittance of the normal display area.