Display Substrate With Separate Initialization Lines for Regional Uniformity
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Solution Overview
Problem
Existing OLED display technologies face challenges in achieving uniform display effects across regions with different light transmittance and pixel density, particularly in areas with integrated optical functional devices like off-screen cameras, leading to disparities in display performance.
Innovation Solution
A display substrate design where first and second pixel driving circuits in different regions are connected to distinct initialization signal lines, allowing independent application of initialization signals to light emitting devices, thereby reducing display differences and enhancing overall display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If different regions share common initialization signal lines, then device complexity is reduced, but display uniformity deteriorates due to different light transmittance and pixel density characteristics
Solution Approach 1:
The patent divides the display substrate into multiple regions (first display region with light-transmitting characteristics and second display region with normal characteristics) and assigns separate initialization signal lines to each region. This segmentation allows independent initialization control for different display regions, resolving the contradiction by accepting increased signal line complexity to achieve display uniformity.
Solution Approach 2:
The patent applies local quality by providing region-specific initialization signal lines tailored to the local characteristics of each display region. The first initialization signal line is optimized for the light-transmitting first display region, while the second initialization signal line is optimized for the normal second display region, ensuring each region receives appropriate initialization signals for its specific pixel density and light transmittance properties.
2Device complexity
If initialization signals are applied uniformly to all light emitting devices, then signal line configuration is simplified, but display effect deteriorates due to regional differences in light transmittance
Solution Approach 1:
The patent segments the initialization signal distribution system into separate signal lines for different regions. The first initialization signal line connects to first pixel driving circuits in the first display region, while the second initialization signal line connects to second pixel driving circuits in the second display region, enabling region-specific initialization control to maintain display reliability.
Solution Approach 2:
The patent changes the initialization signal parameters independently for different regions by providing separate initialization signal lines. This allows different initialization voltage levels or signal timing parameters to be applied to light emitting devices in the light-transmitting first display region versus the normal second display region, optimizing display effect for each region's specific characteristics.
Data Source
AI summary
A display substrate includes a first display region and a second display region located at at least one side of the first display region, a light transmittance of the first display region is greater than that of the second display region. The first display region is provided with first light emitting devices, the second display region is provided with first pixel driving circuits, second pixel driving circuits, and second light emitting devices. The first pixel driving circuit drives the first light emitting device, and the second pixel driving circuit drives the second light emitting device. The second display region further includes initialization signal lines respectively connected with the first pixel driving circuits and the second pixel driving circuits and apply initialization signals thereto. The first pixel driving circuit and the second pixel driving circuit are respectively connected to different initialization signal lines.