OLED Pixel Transistor Sharing for High Resolution
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Solution Overview
Problem
The challenge in increasing the resolution of organic light emitting diode (OLED) displays is limited by the area occupied by thin film transistors and capacitors within each pixel, making it difficult to reduce the pixel size effectively.
Innovation Solution
The proposed solution involves a display device configuration where multiple pixels share transistors and capacitors, reducing the number of transistors in each pixel and optimizing the layout of transistors and signal lines to minimize area usage, allowing for a higher pixel density without increasing the overall size of the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of pixels is increased to improve resolution, then the resolution is improved, but the area occupied by transistors and capacitors in each pixel increases the pixel area
Solution Approach 1:
Adjacent pixels share common transistors (the fourth transistor connected to third transistors, and the seventh transistor connected to sixth transistors), reducing the total number of transistors needed. This merging of components decreases the area occupied by control elements, allowing more pixels to fit in the same display area and thereby improving resolution without proportionally increasing pixel area.
Solution Approach 2:
The shared transistors serve multiple pixels simultaneously, performing universal control functions. The fourth transistor controls both third transistors from adjacent pixels, and the seventh transistor controls both sixth transistors, allowing one component to fulfill multiple functional roles and reducing overall component count.
2Quantity of substance
If the area of one pixel is reduced to increase pixel density, then the resolution is improved, but the number of transistors and capacitors per pixel occupies more area
Solution Approach 1:
By merging control transistors between adjacent pixels, the patent reduces the number of discrete components each pixel needs. The shared fourth and seventh transistors eliminate redundant control elements, directly reducing the area occupied by transistors and capacitors while enabling higher pixel density.
Solution Approach 2:
The patent introduces a shared resource dimension where transistors serve multiple pixels across pixel boundaries. Instead of each pixel having dedicated transistors, the control structure extends into a shared dimension, reducing per-pixel component count and area occupation.
Data Source
AI summary
A display device includes a plurality of pixels. Each pixel includes a first transistor including a first gate electrode, a first source region, and a first drain region, a second transistor connected to the first source region of the first transistor, a third transistor connected to the first gate electrode and the first drain region of the first transistor, a fifth transistor connected to the first source region of the first transistor, and a sixth transistor connected to the first drain region of the first transistor. The pixels include a first pixel and a second pixel disposed adjacent to each other. The first and second pixels share a fourth transistor connected to the third transistor of the first pixel and the third transistor of the second pixel, and share a seventh transistor connected to the sixth transistor of the first pixel and the sixth transistor of the second pixel.