Shared Pixel Circuit for Full-Color Display With Higher Aperture Ratio
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Solution Overview
Problem
The division of pixels into sub-pixels for color display increases circuit area, affecting the aperture ratio and brightness of display panels, especially in augmented reality applications where higher brightness and resolution are demanded.
Innovation Solution
A pixel circuit design utilizing a shared driving circuit and light-emitting control circuit to reduce circuit area and improve aperture ratio, enabling full-color light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If pixels are divided into sub-pixels for color display, then color display capability is improved, but circuit area increases and aperture ratio decreases
Solution Approach 1:
The patent merges the driving circuits of multiple sub-pixels into a shared driving circuit. Instead of providing separate driving circuits for each sub-pixel (red, green, blue), a single shared driving circuit controls all sub-pixels by sequentially providing driving currents based on field-sequential display timing, thereby reducing circuit area while maintaining full-color display capability
Solution Approach 2:
The patent implements field-sequential display by periodically controlling different sub-pixels in time sequence. The shared driving circuit provides driving currents to different sub-pixels at different time periods within each frame, using periodic scanning signals to activate red, green, and blue sub-pixels sequentially, which enables color display without requiring simultaneous independent circuits for each sub-pixel
2Adaptability or versatility
If pixels are divided into sub-pixels for color display, then color display capability is improved, but aperture ratio decreases
Solution Approach 1:
By merging sub-pixel driving circuits into a shared driving circuit, the patent reduces the non-light-emitting circuit area within each pixel, thereby increasing the aperture ratio. The shared driving circuit occupies less space than multiple separate circuits would require, allowing larger portions of the pixel area to be dedicated to light-emitting elements
Solution Approach 2:
The shared driving circuit serves multiple functions by controlling different sub-pixels at different time periods. It can drive red, green, and blue sub-pixels sequentially, making a single circuit structure perform the work of multiple circuits, which increases the effective aperture ratio while maintaining full-color display capability
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
The sharing of current generating and light-emitting control circuits reduces circuit area, enhancing the aperture ratio and brightness of display panels while supporting full-color light display.
Implementation Method 1
The light-emitting element is for providing full-color light
Data Source
AI summary
A pixel circuit is disclosed. The pixel circuit includes a current generating circuit, one or more light-emitting elements, and a light-emitting control circuit. The current generating circuit receives pixel data to provide a driving current. The light-emitting element is used to provide full-color light. The light-emitting control circuit is coupled in series with the current generating circuit and the light-emitting element, and controls light-emitting brightness of the full-color light based on the driving current.