Display Device Scanning Line Merging for Resolution
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Solution Overview
Problem
In organic EL display devices, increasing the number of sub-pixels to achieve higher resolution leads to a reduction in the horizontal scanning period, resulting in deteriorated display quality, especially as the driving frame rate increases.
Innovation Solution
The display device incorporates a scanning line, data lines, transistor circuits, and light emitting elements arranged in a specific configuration where the transistor circuits are aligned in the row direction and the pixel electrodes in the column direction, allowing for a common scanning line to control multiple selection transistors, thereby reducing the number of scanning lines required.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of sub-pixels is increased to achieve higher resolution, then the display resolution is improved, but the horizontal scanning period is reduced
Solution Approach 1:
The patent merges the control of multiple selection transistors under a single scanning line. Specifically, multiple selection transistors (e.g., first selection transistor and second selection transistor) are controlled by the same scanning line (first scanning line), allowing them to be simultaneously turned on. This merging of control functions reduces the number of scanning lines required and extends the horizontal scanning period, resolving the contradiction between high resolution and sufficient scanning time.
Solution Approach 2:
The scanning line is designed to serve multiple functions simultaneously. A single scanning line controls multiple selection transistors across different data lines, making it a multi-functional control element. This universality allows the display device to maintain high resolution with fewer scanning lines, thereby extending the horizontal scanning period.
2Productivity
If the driving frame rate is increased, then the display refresh rate is improved, but the horizontal scanning period is further reduced
Solution Approach 1:
By merging the control of multiple selection transistors under a single scanning line, the patent reduces the total number of scanning operations required per frame. This allows the horizontal scanning period to be extended even at higher frame rates, maintaining sufficient time for signal transmission and pixel activation.
3Measurement precision
If the number of scanning lines is increased to control more sub-pixels, then the display resolution is improved, but the device complexity is increased
Solution Approach 1:
The patent merges multiple control functions into a single scanning line, reducing the total number of scanning lines required. This merging approach maintains high display resolution while reducing device complexity by minimizing the number of wiring connections and control signals needed.
Solution Approach 2:
Each scanning line is designed to perform multiple control functions simultaneously, managing multiple selection transistors and data lines. This multi-functionality reduces the overall number of scanning lines required, thereby reducing device complexity while maintaining high resolution.
Data Source
AI summary
A display device includes a scanning line, a first data line and a second data line, a first transistor circuit, a second transistor circuit, a first light emitting element including a first pixel electrode, and a second light emitting element including a second pixel electrode, wherein the first transistor circuit includes a first drive transistor and a first selection transistor, the second transistor circuit includes a second drive transistor and a second selection transistor, the first pixel electrode and the second pixel electrode are arranged in the second direction, the first transistor circuit and the second transistor circuit are arranged in the first direction, and a gate included in the first selection transistor and a gate included in the second selection transistor are electrically coupled to the scanning line.