OLED Pixel Circuit Sharing for Backboard Complexity Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The complexity of pixel circuits in active matrix organic light-emitting diode (AMOLED) panels leads to increased area occupation on the backboard, limiting pixel density due to the need for different circuits for each sub-pixel, which complicates the board process.
Innovation Solution
A pixel structure where multiple organic light-emitting diodes of the same color share a single pixel circuit, with a switch circuit controlling their emission times to reduce the number of pixel circuits required, thereby simplifying the board process and maintaining or increasing pixel density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each sub-pixel uses a different pixel circuit configuration for compensation, then luminance non-uniformity and threshold voltage drift are compensated, but the area occupied by pixel circuits on the back board increases
Solution Approach 1:
Multiple organic light-emitting diodes of the same color in the same column share a common pixel circuit through the switch circuit, merging multiple independent circuits into one shared circuit, thereby reducing the total area occupied by pixel circuits on the back board while maintaining compensation functionality
Solution Approach 2:
A single pixel circuit is designed to serve multiple OLEDs simultaneously through the switch circuit, making the pixel circuit universal and multi-functional, which reduces the number of circuits needed and decreases back board area occupation
2Reliability
If the configuration of pixel circuit having compensation function is completed, then luminance non-uniformity is compensated, but pixel density on the display panel decreases
Solution Approach 1:
Multiple OLEDs share one pixel circuit, merging circuit resources to reduce the total number of circuits required, which directly increases pixel density on the display panel while preserving luminance uniformity compensation capability
Solution Approach 2:
The switch circuit controls different OLEDs to emit light in different time periods, enabling time-division multiplexing where a single pixel circuit serves multiple OLEDs sequentially, thereby increasing pixel density without sacrificing compensation performance
3Productivity
If pixel density on the display panel is increased, then more sub-pixels are accommodated, but the complexity of back board process increases
Solution Approach 1:
Multiple OLEDs share a common pixel circuit and switch circuit, merging multiple independent circuit paths into fewer shared circuits, which simplifies the back board process and reduces manufacturing complexity while enabling higher pixel density
Solution Approach 2:
The pixel circuit and switch circuit are designed as universal components that can control multiple OLEDs, reducing the variety and number of different circuit configurations needed, thereby simplifying the back board process complexity
Data Source
AI summary
There are provided a pixel structure, a display panel and a display apparatus. The pixel structure comprises a pixel circuit (11), a switch circuit (12) and n organic light-emitting diodes (13) sharing the pixel circuit (11), where n is greater than or equal to 2. Respective organic light-emitting diodes (13) sharing the pixel circuit (11) are located in a same column of the display panel, and emit lights of a same color when emitting light. The switch circuit (12) is configured to control any two organic light-emitting diodes (13) sharing the pixel circuit (11) to emit light at different periods of time. The pixel circuit (11) is configured to drive of the respective organic light-emitting diodes sharing the pixel circuit (11) to emit light according to a received data signal. The pixel structure is used to solve the problem of the complexity of the back board.