Display substrate and display apparatus
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Solution Overview
Problem
Existing display technologies face challenges in achieving uniform brightness and reducing brightness differences across display regions, particularly in under-display camera technologies where the integration of a camera necessitates a non-display area, leading to uneven illumination.
Innovation Solution
A display substrate design incorporating a capacitance compensation layer with compensation capacitance electrode plates connected to the anodes of light emitting elements, enhancing anode capacitance and reducing brightness variations through conductive layers and transparent materials, allowing for improved uniformity and brightness consistency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If an under-display camera is integrated to increase screen-to-body ratio, then the screen-to-body ratio is improved, but brightness uniformity deteriorates due to non-display areas
Solution Approach 1:
The patent applies local quality by differentiating between first display regions (with display function) and second display regions (without display function, for camera integration). The capacitance compensation layer is selectively positioned in the first display regions to compensate for brightness variations caused by the camera integration in the second display regions, thereby maintaining overall brightness uniformity while achieving high screen-to-body ratio.
Solution Approach 2:
The patent implements preliminary action by pre-positioning the capacitance compensation layer in the first display regions before the display operates. This compensation capacitance is established in advance to counteract the brightness differences that would otherwise occur due to the camera integration in the second display regions, ensuring uniform brightness from the start.
2Illumination intensity
If capacitance compensation layer is added to improve brightness uniformity, then brightness uniformity is improved, but device complexity increases
Solution Approach 1:
The patent resolves the contradiction by adding the capacitance compensation layer in the vertical dimension (as an additional layer between the circuit structure layer and light emitting structure layer) rather than expanding horizontally. This allows brightness compensation functionality to be integrated into the existing layered structure without significantly increasing lateral complexity or area.
Solution Approach 2:
The capacitance compensation layer serves multiple functions: it provides capacitance compensation to improve brightness uniformity, maintains electrical connection through conductive layers, and integrates seamlessly with the existing display structure. This multi-functionality reduces the need for separate compensation mechanisms, thereby limiting the increase in device complexity.
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 solution enhances brightness uniformity and display quality by increasing anode capacitance, thereby improving the display effect, especially in regions with integrated cameras, facilitating true full-screen displays.
Implementation Method 1
At least one capacitance compensation layer is located in the first display region and on a side of the light emitting structure layer close to the base substrate. The capacitance compensation layer includes at least one compensation capacitance electrode plate. An anode of the at least one first light emitting element is electrically connected with a compensation capacitance electrode plate of the at least one capacitance compensation layer.
Data Source
AI summary
A display substrate includes a base substrate (100), a circuit structure layer (20), a light emitting structure layer (4), at least one conductive layer, and at least one capacitance compensation layer (51). The base substrate (100) includes a first display region (A1) and a second display region (A2) at least partially surrounding the first display region (A1). The capacitance compensation layer (51) is located in the first display region (A1) and on a side of the light emitting structure layer (4) close to the base substrate (100). The capacitance compensation layer (51) includes at least one compensation capacitance electrode plate (511). An anode (411) of at least one first light emitting element (13) is electrically connected with the compensation capacitance electrode plate (511) of the capacitance compensation layer (51).