Transparent Display Substrate Layout With Shared Pixel Circuits
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Solution Overview
Problem
Existing display technologies face challenges in achieving high resolution and transparency in display regions with integrated camera modules, particularly in under-display camera (UDC) applications, where the integration of pixel circuits and light emitting elements complicates the balance between image clarity and visibility.
Innovation Solution
A display substrate design that reduces the number of pixel circuits in transparent regions and uses one pixel circuit to drive multiple light emitting elements of the same color, optimizing the arrangement of pixel circuits and conductive layers to enhance transmittance and reduce diffraction effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pixel circuits and light emitting elements are integrated in transparent display regions to achieve high resolution, then image clarity is improved, but transmittance deteriorates due to increased pixel circuit overlap
Solution Approach 1:
The patent segments the pixel circuit functionality by introducing a shared pixel circuit that serves multiple light emitting elements (specifically, one pixel circuit drives two light emitting elements of the same color). This segmentation reduces the number of pixel circuits in the transparent display region, minimizing their overlap and improving transmittance while maintaining image clarity through the shared circuit architecture.
2Illumination intensity
If the number of pixel circuits is reduced in transparent regions, then transmittance is improved, but device complexity increases due to shared circuit architecture
Solution Approach 1:
The patent applies universality by designing a shared pixel circuit that performs multiple functions - it controls and drives two different light emitting elements (e.g., red and blue subpixels) simultaneously. This multi-functional circuit reduces the total number of pixel circuits needed in the transparent region, improving transmittance while the standardized shared circuit design keeps the added complexity manageable.
3Area of stationary object
If pixel circuits are positioned to overlap with light emitting elements for compact layout, then area efficiency is improved, but diffraction effects increase
Solution Approach 1:
The patent applies local quality by strategically positioning the shared pixel circuit to overlap specifically with larger light emitting elements (such as red or blue subpixels with larger anode areas) rather than uniformly distributing overlap across all elements. This localized positioning strategy maintains compact layout efficiency while minimizing diffraction effects by avoiding overlap with smaller, more sensitive light emitting elements.
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
The design ensures consistent resolution and improved transmittance in transparent display regions, facilitating applications such as Quarter High Definition (QHD) displays by minimizing pixel circuit overlap and enhancing light transmission.
Implementation Method 1
A plurality of first-region light emitting elements and a plurality of first-region pixel circuits are located in the transparent display region. At least one first-region pixel circuit of the plurality of first-region pixel circuits is electrically connected with at least two first-region light emitting elements emitting light in a same color.
Data Source
AI summary
A display substrate includes a base substrate, a plurality of first-region light emitting elements and a plurality of first-region pixel circuit. The base substrate includes a display region and a peripheral region at least partially surrounding the display region, wherein the display region includes a transparent display region. A plurality of first-region light emitting elements and a plurality of first-region pixel circuits are located in the transparent display region. At least one first-region pixel circuit of the plurality of first-region pixel circuits is electrically connected with at least two first-region light emitting elements emitting light in a same color. An orthographic projection of at least one first-region pixel circuit on the base substrate is overlapped with an orthographic projection of at least one first-region light emitting element on the base substrate.