Redundant Display Driver Layout for High-Resolution XR Panels
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Solution Overview
Problem
Display apparatuses for XR equipment require high resolution and reduced size, which increases the complexity of driver circuits, leading to potential malfunctions due to variations in circuit elements, and there is a need for redundancy and high yield in manufacturing.
Innovation Solution
A display apparatus with a first and second layer, each containing driver circuits and pixel regions, connected through a switch, allowing redundancy and efficient data transmission, and utilizing silicon and metal oxide transistors for improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the resolution of the display apparatus is increased, then the number of pixels is increased, but the circuit area of the driver circuit is increased
Solution Approach 1:
The pixel array is divided into multiple blocks, with each block driven by a separate driver circuit. This segmentation allows the total number of pixels to increase while the area of each individual driver circuit remains manageable, as each driver only needs to control a subset of pixels rather than the entire array.
Solution Approach 2:
The patent introduces a block selection dimension by adding block selection lines that can select which block of pixels is currently active. This additional dimensional control allows the display to achieve high resolution across multiple blocks while using a limited number of driver circuits, effectively trading spatial arrangement for functional capability.
2Volume of moving object
If the size of the display apparatus is reduced, then the pixel size is reduced, but the pitch width between pixels and wirings is reduced
Solution Approach 1:
By dividing the pixel array into blocks and using block selection lines, the patent can reduce the active area for any given time slice. This allows for smaller pixel sizes and reduced pitch widths within each block, as the manufacturing precision requirements are applied to smaller, manageable units rather than the entire display area simultaneously.
3Quantity of substance
If the number of pixels is increased, then the amount of data per frame is increased, but the speed of the driver circuit is increased
Solution Approach 1:
The pixel array is divided into multiple blocks that can be driven independently. Each driver circuit only needs to handle the data for its assigned block, significantly reducing the data volume and speed requirements for each individual driver compared to driving the entire high-resolution array from a single driver.
Solution Approach 2:
The patent employs time-division multiplexing where different blocks of pixels are activated in sequential time slots. Block selection lines enable this periodic activation pattern, allowing the system to drive a large number of pixels by cycling through blocks over time, thereby reducing the instantaneous data transmission speed requirement for each driver circuit.
4Area of stationary object
If the size of the circuit element is reduced, then the circuit area is reduced, but variations in characteristics of the circuit elements occur
Solution Approach 1:
By segmenting the pixel array into blocks with dedicated drivers, the patent can use larger, more reliable circuit elements in each driver without proportionally increasing the total circuit area. The segmentation distributes the driving burden across multiple drivers, allowing each to use robust circuit design while maintaining overall area efficiency.
Data Source
AI summary
A display apparatus with a driver circuit having redundancy is provided. The display apparatus includes a first layer and a second layer positioned above the first layer. The first layer includes a first driver circuit and a second driver circuit. The second layer includes a first pixel region and a second pixel region. The first pixel region includes a first pixel circuit and the second pixel region includes a second pixel circuit. The first pixel region includes a region overlapping with the first circuit and the second pixel region includes a region overlapping with the second circuit. The first pixel circuit is electrically connected to the first driver circuit through a first wiring, the second pixel circuit is electrically connected to the second driver circuit through a second wiring, and the first wiring is electrically connected to the second wiring through a switch.