Pixel Circuit Sharing Control Line for High PPI Displays
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Solution Overview
Problem
Current MIP pixel structures require numerous display control lines, limiting the increase in pixels per inch (PPI), increasing charging differences, and complicating the Gate on Array (GOA) structure, which hinders the simplification and miniaturization of display panels.
Innovation Solution
A pixel circuit design where two pixel units share a single display control line, with each unit having a control circuit and display driving circuit that adjusts and latches voltage phases to provide display driving voltages, reducing the need for multiple control lines and simplifying the GOA structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If each pixel unit is connected to a separate display control line, then the control signal can be transmitted accurately, but the number of control lines increases, reducing PPI and increasing device complexity
Solution Approach 1:
The patent merges multiple pixel units (first and second pixel units) to share a single display control line. The control circuit uses voltage latching mechanisms (first and second positive phase nodes) to store and differentiate control signals for each pixel unit, enabling multiple pixels to be controlled through one physical line while maintaining signal accuracy.
Solution Approach 2:
The patent segments the control signal transmission into distinct voltage phases (positive phase nodes) that can be latched and differentiated. Each pixel unit has its own control circuit that processes voltage signals in a segmented temporal manner, allowing multiple pixels to share a control line without signal interference.
2Adaptability or versatility
If multiple display control lines are used, then each pixel unit can be controlled independently, but the charging difference between pixel units increases
Solution Approach 1:
The patent creates equipotential conditions by using shared voltage nodes (positive phase nodes) that are simultaneously controlled for multiple pixel units. The control circuits adjust voltages to ensure that both pixel units experience equivalent charging conditions, reducing charging differences while maintaining independent control through voltage phase differentiation.
3Productivity
If more display control lines are provided, then the GOA structure can drive more pixels, but the structure becomes more complex and border space increases
Solution Approach 1:
The patent makes the single display control line universal by enabling it to control multiple pixel units through voltage latching and phase differentiation. The control circuit is designed to handle multiple pixel units through one line, making the control system multi-functional and reducing the need for additional dedicated control lines for each pixel unit.
Data Source
AI summary
The present disclosure relates to a pixel circuit. The pixel circuit may include a first pixel unit having a first display driving circuit, a first pixel, and a first control circuit, and a second pixel unit having a second display driving circuit, a second pixel electrode, and a second control circuit. The first control circuit may be configured to adjust and latch a voltage of a first positive phase node and the first display driving circuit. The first display driving circuit may be configured to provide a first display driving voltage to the first pixel electrode. The second control circuit may be configured to adjust and latch a voltage of a second positive phase node and the second display driving circuit. The second display driving circuit may be configured to provide a second display driving voltage to the second pixel electrode.