Display Substrate Dual-Circuit Layout for Imaging-Area Brightness
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Solution Overview
Problem
In display apparatuses with integrated imaging elements, the presence of light-emitting elements and opaque traces in sub-pixels affects light transmittance, leading to uneven display brightness and reduced imaging quality due to lower pixel density in certain regions.
Innovation Solution
A display substrate design with two pixel circuit units driving a single light-emitting element in low-density regions, utilizing separate power voltage terminals to supply distinct pixel power voltages, maintaining the drive transistor in saturation and enhancing light emission stability while reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If pixel density is reduced in certain regions to accommodate imaging elements, then imaging functions can be integrated, but display brightness and uniformity deteriorate
Solution Approach 1:
The display region is segmented into first display region with first sub-pixels and second display region with second sub-pixels having different pixel densities. The power voltage terminal is segmented into first and second power voltage terminals that supply different pixel power voltages to different regions, allowing independent optimization of brightness and imaging functions in each region.
Solution Approach 2:
Different regions of the display substrate are assigned different pixel power voltages based on their specific requirements. The first display region with higher pixel density receives first pixel power voltage optimized for brightness, while the second display region with lower pixel density receives second pixel power voltage optimized for imaging element operation, achieving local quality optimization.
2Adaptability or versatility
If pixel density is reduced in certain regions to integrate imaging elements, then imaging functions can be added, but display uniformity deteriorates
Solution Approach 1:
The display region is segmented into distinct first and second display regions with different pixel densities, each served by separate power voltage terminals. This segmentation allows different pixel power voltages to be applied to different regions, maintaining display uniformity despite varying pixel densities by compensating for the differences through voltage adjustment.
Solution Approach 2:
The pixel power voltage parameter is changed differently for different regions. By adjusting the pixel power voltage based on the specific requirements of each display region (first display region with higher density vs. second display region with lower density), the system maintains display uniformity while accommodating varying pixel densities caused by imaging element integration.
3Illumination intensity
If separate power voltage terminals are used for different pixel density regions, then light emission brightness and stability improve, but device complexity increases
Solution Approach 1:
The power voltage supply system is segmented into separate first and second power voltage terminals corresponding to different display regions. This segmentation, while increasing device complexity, enables independent control of pixel power voltages to optimize light emission brightness and stability in each region despite different pixel densities.
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
Improves light emission brightness and stability in low-density regions, maintaining display uniformity and reducing power consumption by separately controlling pixel power voltages, thus enhancing the overall performance of the display apparatus.
Implementation Method 1
the drive sub-circuit is configured to form a driving current flowing through the light-emitting element in response to the pixel power voltage
Data Source
Figure 1~2A
Figure 2B
Figure 2C
AI summary
Provided are a display substrate (20) and a display apparatus (40). The display substrate (20) comprises a first display area (21) and a second display area (22), the pixel density of the first display area (21) being greater than that of the second display area (22). A first pixel circuit (110) of a first sub-pixel of the first display area (21) comprises a pixel circuit unit (100), and a second pixel circuit (120) of a second sub-pixel of the second display area (22) comprises two pixel circuit units (100); and the first pixel circuit (110) is configured to be connected to a first power supply voltage end (103) so as to receive a first power supply voltage (VDD1) as a pixel power supply voltage, and the second pixel circuit (120) is configured to be connected to a second power supply voltage end (104) so as to receive a second power supply voltage (VDD2) as a pixel power supply voltage, the first power supply voltage (VDD1) being different from the second power supply voltage (VDD2).