Display Photo Sensor Power Line Layout for Dense Pixel Arrays
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Solution Overview
Problem
Existing display devices face challenges in efficiently arranging power lines to photo sensors and pixels due to their decreasing size, which affects the functionality and efficiency of these components.
Innovation Solution
A power line configuration is implemented where a power line extends in one direction and is connected to photo sensor circuits, with additional power line extension electrodes extending in a different direction, allowing efficient power distribution to adjacent pixels and sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the size of photo sensor and pixel becomes smaller, then the integration density increases, but the power line arrangement becomes more difficult
Solution Approach 1:
The power line arrangement is segmented into two distinct components: a main power line extending in the first direction and power line extension electrodes extending in the second direction. This segmentation allows independent optimization of each component's layout, enabling efficient power distribution to photo sensors and pixels even as their sizes decrease and integration density increases.
Solution Approach 2:
The power line configuration transitions from a single-directional arrangement to a two-dimensional grid-like structure by introducing extension electrodes in a direction perpendicular to the main power line. This dimensional change provides additional pathways for power distribution, resolving the arrangement complexity issue while maintaining high integration density.
2Productivity
If photo sensors are arranged adjacent to pixels in multiple directions, then the functional efficiency improves, but the power supply arrangement becomes more complex
Solution Approach 1:
The combination of main power line and extension electrodes creates a universal power distribution structure that can serve multiple photo sensors arranged in different directions. The extension electrodes in the second direction enable power supply to photo sensors positioned adjacent to pixels in orientations perpendicular to the main power line's extension, allowing the same power line structure to support multi-directional sensor arrangements.
3Productivity
If power line extension electrodes are added to connect photo sensors, then the power distribution efficiency improves, but the device structure becomes more complex
Solution Approach 1:
The power line extension electrodes are pre-configured in the second direction to anticipate and accommodate photo sensors positioned in multiple orientations. This preliminary structural preparation enables efficient power distribution to future sensor placements without requiring additional complex routing or modification of the main power line structure.
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
This configuration enhances the operational efficiency and functionality of photo sensors and pixels by optimizing power supply, improving the overall performance of the display device.
Implementation Method 1
each of the first photo sensor and the second photo sensor may include a light receiving element
Data Source
AI summary
A display device includes: a first pixel; a first photo sensor adjacent to the first pixel in a first direction and including a photo sensor circuit; a second pixel adjacent to the first pixel in a second direction different from the first direction; a second photo sensor adjacent to the second pixel in the first direction and including a photo sensor circuit; a power line entirely extending in the first direction, configured to receive a reset voltage, and directly connected to the photo sensor circuit of the second photo sensor; a power line connection electrode in an island shape and directly connected to the photo sensor circuit of the first photo sensor; and a power line extension electrode connected to the power line, the power line extension electrode entirely extending in the second direction, the power line extension electrode being directly connected to the power line connection electrode.