Dummy Pixel Circuit Layout for Under-Display Sensor Integration
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Solution Overview
Problem
Existing display apparatuses face challenges in integrating additional functionalities, such as cameras and sensors, within the display area without compromising the display's functionality and structural integrity.
Innovation Solution
Incorporation of dummy pixels and specialized circuitry within non-display areas, including emission control lines and power supply lines, to accommodate additional electronic elements like cameras and sensors, while maintaining display performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional functionalities such as cameras and sensors are integrated within the display area, then the versatility of the display apparatus is improved, but the structural integrity and display functionality are compromised
Solution Approach 1:
The display area is segmented into active display regions and non-display regions. The non-display regions are further divided into first non-display areas (surrounding first and second regions) and second non-display areas, allowing different functional elements to be placed in different segments without interfering with the overall structural integrity of the display apparatus.
Solution Approach 2:
Different regions of the display apparatus are assigned different functional qualities. The first non-display areas contain dummy pixels and emission control lines for controlling light emission, while the second non-display areas contain driver circuits and power supply lines. This local differentiation allows each region to be optimized for its specific function while maintaining overall system integrity.
2Adaptability or versatility
If dummy pixels and emission control lines are added to non-display areas, then the ability to control light emission is improved, but the device complexity increases
Solution Approach 1:
The emission control lines serve multiple functions: they control the dummy pixels in the first non-display areas, manage the driver circuits in the second non-display areas, and coordinate with the power supply lines to regulate overall light emission. This multi-functionality reduces the need for separate control mechanisms, thereby managing complexity while enhancing control capability.
Solution Approach 2:
The dummy pixels act as intermediary elements between the emission control lines and the actual display pixels. They provide a buffer zone for controlling light emission patterns, allowing the emission control lines to regulate display output without directly interfacing with each individual pixel, thus simplifying the control architecture.
3Adaptability or versatility
If power supply lines are connected to emission control lines and dummy pixels, then the electrical connectivity is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The power supply lines and emission control lines are arranged in different spatial dimensions and layers within the non-display areas. By utilizing vertical stacking and lateral separation, the patent reduces the need for precise point-to-point connections, as lines can connect at different levels or through contact holes, thereby reducing manufacturing precision requirements while maintaining electrical connectivity.
Data Source
AI summary
A display apparatus includes: a substrate including: a first region; a second region; a first non-display area surrounding the first region and the second region; and a display area surrounding at least a portion of an outline of the first non-display area; a plurality of dummy pixels at the first non-display area, and to not emit light; a plurality of emission control lines connected to at least one of the plurality of dummy pixels; and a plurality of power supply lines to supply a driving voltage to the plurality of dummy pixels, respectively. One of the plurality of power supply lines is electrically connected to one of the plurality of emission control lines, and one of the plurality of power supply lines is connected to one of the plurality of dummy pixels.