Display Pixel Sharing for Higher Frame Rates Without More Data Transfer
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Solution Overview
Problem
Existing display devices face challenges in increasing frame rate without a corresponding increase in data transfer amount, particularly in augmented reality and virtual reality applications where parallel processing of video information for both eyes is required.
Innovation Solution
A display device with a two-dimensional array of pixels, controlled by control and data lines, utilizes a second control unit to supply the same image signal to two data lines in adjacent pixels, alternating the lines in different frames, and performing doubler or binning processes to enhance frame rate without increasing data transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the frame rate is increased by scanning pixel values every two lines (doubler drive or binning drive), then the frame rate is increased in a pseudo manner, but the data transfer amount increases
Solution Approach 1:
The patent merges adjacent pixels in the vertical direction to share the same data line. Specifically, two adjacent pixels (at positions 2n and 2n+1) are combined to use a single data line, thereby reducing the total number of data lines required. This merging approach allows the system to achieve a pseudo-increased frame rate through line skipping while avoiding the proportional increase in data transfer that would normally result from increased frame rates.
Solution Approach 2:
The patent makes data lines serve multiple functions by having them control multiple adjacent pixels simultaneously. A single data line is designed to supply signals to two different pixel rows (2n and 2n+1), enabling the data line to perform the function of controlling multiple pixels that would traditionally require separate data lines. This multi-functionality reduces the overall data transfer burden while maintaining the ability to display at higher pseudo frame rates.
2Productivity
If the frame rate is increased for AR and VR applications to process video information for both eyes in parallel, then image reproduction quality improves, but the data transfer rate becomes the limiting factor
Solution Approach 1:
The patent combines adjacent pixel rows to share data lines, reducing the total data transfer required. By merging pixels at positions 2n and 2n+1 to use the same data line, the system can process video information for both eyes in parallel at higher frame rates without proportionally increasing the data transfer rate, thus resolving the bottleneck for AR and VR applications.
Solution Approach 2:
The patent segments the pixel array into groups where adjacent pixels share data lines. This segmentation allows independent control of pixel groups while reducing overall data transfer requirements. The segmentation strategy enables parallel processing of multiple pixel groups simultaneously, improving frame rate capability for dual-eye AR and VR content without linearly increasing data transfer demands.
Data Source
AI summary
Display devices that accommodate increased frame rate without an increase in data transfer amount are disclosed. In one example, a display device includes pixels, control lines and data lines. The pixels are arranged in a two-dimensional array. The control lines extend in a first direction, and the data lines extend in a second direction. A pixel includes first through third subpixels that respectively emit first through third colors. Each subpixel includes a light emitting element, a capacitor, a write transistor, and a drive transistor. A control unit supplies the same image signal to two of the data lines corresponding to two of the first subpixels provided in two adjacent pixels.