Pixel Circuit Serial Signal Processing for Display Power Optimization
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Solution Overview
Problem
Conventional pixel circuits in display devices face challenges with high power consumption due to static current flow and increased complexity from numerous contacts, which hinder the implementation of high-resolution displays and large-size devices.
Innovation Solution
A display device is designed with a signal controller that generates voltage signals to optimize power consumption by serially processing signals, reducing the number of contacts and contacts required for signal transmission, and using a transparent electrode body to simplify the pixel circuit structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If signal and power are separately input to pixel circuit with continuous power supply, then power supply stability is improved, but static current consumption increases leading to high power consumption
Solution Approach 1:
The pixel circuit uses periodic PWM (Pulse Width Modulation) signals to control light emission instead of continuous DC power supply. The emission control unit generates periodic pulse signals that turn the light emitting element on and off, allowing power to be supplied only during emission periods rather than continuously, thereby eliminating static current consumption while maintaining reliable power supply during active periods.
2Adaptability or versatility
If multiple contacts are connected between pixel circuit and line for separate signal transmission, then signal transmission capability is improved, but pick and place yield and efficiency decrease
Solution Approach 1:
The invention merges multiple separate signal transmission functions into a single integrated contact. Instead of having separate contacts for power signal, ground signal, and emission control signal, the pixel circuit uses one contact to receive a combined signal that carries all necessary information. The emission control unit within the pixel circuit then separates and processes these signals internally, achieving the same signal transmission capability with reduced contact points and improved pick and place efficiency.
3Adaptability or versatility
If multiple contacts are connected between pixel circuit and line, then signal transmission capability is improved, but device complexity increases making large-size display implementation difficult
Solution Approach 1:
The invention integrates multiple signal transmission functions into a single contact interface. The pixel circuit includes an emission control unit that receives a combined signal through one contact and internally separates power, ground, and control signals. This merging approach reduces the number of contacts required per pixel, simplifying the overall contact structure and making large-size display implementation feasible while maintaining full signal transmission capability.
4Loss of information
If parallel signals are used to transmit signal for each sub-pixel, then signal transmission completeness is improved, but metal routing area increases
Solution Approach 1:
The invention replaces the traditional parallel signal transmission mechanism with a serial communication approach. Instead of using separate metal routing lines for each sub-pixel signal, the pixel circuit receives a single combined signal through one contact and uses internal signal processing to extract and distribute the necessary information to each sub-pixel. This substitution dramatically reduces metal routing area while maintaining complete signal transmission through intelligent signal processing.
Data Source
AI summary
The present invention is related to pixels and a display apparatus including: a display unit including a plurality of pixels; a signal control unit for generating a first voltage signal and a second voltage signal; a column driver connected to each of the pixels to transmit the first voltage signal to the pixel through a column line; and a row driver connected to each of the pixels to transmit the second voltage signal to the pixel through a row line, wherein the signal control unit generates the second voltage signal so that a voltage level of the second voltage signal rises to be higher than or equal to a predetermined level value during a non-emission period of the pixel.