Mixed N-Type and P-Type Pixel Circuit for Lower-Power Displays
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Solution Overview
Problem
Existing display devices face challenges in achieving reduced power consumption and improved display quality, particularly in multimedia electronic devices such as TVs, mobile phones, and game consoles, due to inefficiencies in scan and data signal transmission.
Innovation Solution
The implementation of a display device design that includes a combination of N-type and P-type transistors in switching transistors, controlled by different scan signals, and a shared data line configuration to optimize signal transmission and reduce unnecessary circuitry, thereby minimizing power consumption and enhancing display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a shared data line configuration with N-type and P-type transistors is used, then power consumption is reduced and display quality is improved, but circuit design complexity increases
Solution Approach 1:
The patent combines N-type and P-type transistors in a shared data line configuration where transistors from different pixel circuits share common nodes and data lines. This merging reduces the total number of dedicated circuit elements per pixel, lowering overall power consumption while maintaining display quality through complementary transistor characteristics.
Solution Approach 2:
The patent applies different transistor types (N-type and P-type) in specific locations within the pixel circuit to optimize local performance. By strategically placing complementary transistor types in switching and driving positions, the circuit achieves better voltage control and reduced leakage current, thereby reducing power consumption without requiring complete redesign of the entire display system.
2Illumination intensity
If different transistor types are used in switching transistors, then luminance consistency is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent employs different transistor types (N-type and P-type) in specific switching positions to compensate for local electrical characteristics. By using complementary transistor types in adjacent or related switching positions, the design achieves better luminance uniformity across the display by balancing out variations in threshold voltage and current characteristics that would otherwise manifest as display non-uniformity.
Data Source
AI summary
Disclosed is a display device that includes a first scan line, a second scan line, a data line, a first pixel electrically connected to the first scan line and the data line, and a second pixel electrically connected to the first scan line, the second scan line, and the data line. The first pixel includes a first driving transistor connected to a first light emitting element and a first switching transistor connected between a gate of the first driving transistor and the data line. The second pixel includes a second driving transistor connected to a second light emitting element and a second switching transistor connected between a gate of the second driving transistor and the data line. One of the first switching transistor and the second switching transistor is an N-type transistor, and the other one thereof is a P-type transistor.