Display Pixel Layout With Boosting Capacitors for Sensor Areas
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Solution Overview
Problem
Existing display devices face challenges in adjusting luminance levels in areas where sensors overlap with the display area, leading to inefficiencies in luminance control.
Innovation Solution
The display device incorporates a first display area with high pixel density and a second display area with lower pixel density, utilizing boosting capacitors to adjust luminance levels, and includes a method of driving the device with specific initialization, data writing, delay, and emission periods to manage voltage levels across different pixel densities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If sensors are integrated overlapping the display area, then device functionality is enhanced, but luminance control becomes difficult
Solution Approach 1:
The display area is divided into a first display area with first pixels and a second display area with second pixels. The second display area where sensors overlap is segmented from the first display area, allowing independent luminance control through separate pixel density adjustment and boosting capacitor configuration
Solution Approach 2:
Different pixel densities are applied to different display areas: the first display area has a first pixel density while the second display area has a second pixel density. Additionally, boosting capacitors are selectively applied to second pixels in the sensor-overlapping region, creating local quality differences that enable precise luminance control in the sensor area
2Stability of the object's composition
If pixel density is increased in the second display area, then luminance uniformity improves, but device complexity increases
Solution Approach 1:
The pixel density parameter is changed between different display areas: the first display area uses a first pixel density while the second display area uses a second pixel density. This parameter change allows luminance uniformity to be maintained without requiring identical pixel configurations throughout the entire display
3Adaptability or versatility
If boosting capacitors are added to second pixels, then luminance adjustment capability improves, but manufacturing complexity increases
Solution Approach 1:
The pixel structure is segmented into first pixels without boosting capacitors and second pixels with boosting capacitors. This segmentation allows the boosting capacitor feature to be selectively implemented only in the second display area where sensors overlap, rather than requiring all pixels to have the same complex structure
Solution Approach 2:
Boosting capacitors are applied locally to second pixels in the sensor-overlapping region rather than uniformly across the entire display. This local quality approach enables luminance adjustment capability precisely where needed while simplifying manufacturing for the majority of pixels that do not require this feature
Data Source
AI summary
A display device includes: a display unit including a first display area, and a second display area; a scan driver configured to provide a scan signal to each scan line connected to the plurality of first pixels and the plurality of second pixels; and an emission controller configured to provide an emission control signal to each emission control line connected to the plurality of first pixels and the plurality of second pixels, wherein the plurality of first pixels have a first density in the first display area, the plurality of second pixels have a second density less than the first density in the second display area, and the plurality of second pixels include at least one sub pixel including one boosting capacitor.