Display Driver Buffer Circuit for Leakage Current Isolation
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Solution Overview
Problem
Existing display technologies face challenges in achieving high image quality and efficient control of light emission for large-sized displays, particularly in implementing 3D stereoscopic image displays, due to complexities in circuit design and high leakage currents in thin film transistor circuits.
Innovation Solution
A driver device is developed with a circuit configuration that includes a first and second driving circuit and a buffer circuit, utilizing 3-phase clock signals to generate output signals for controlling light emission, allowing for flexible duty ratio control and operation in thin film transistor circuits with large leakage currents, thereby simplifying the interface and improving image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a complex circuit design is used to control light emission for high image quality and 3D display, then image quality and display capability are improved, but device complexity increases
Solution Approach 1:
The driver is divided into multiple independent driving circuits (first driving circuit, second driving circuit, etc.), each capable of independently controlling light emission. This segmentation allows complex display functions to be achieved through coordinated operation of simpler modular units, reducing overall circuit complexity while maintaining high image quality.
Solution Approach 2:
Each driving circuit is designed with multi-functionality to handle various display modes (sequential light emitting, simultaneous light emitting, 3D stereoscopic display) through a unified structure. The circuits can operate in different configurations depending on the display requirements, eliminating the need for separate dedicated circuits for each function.
2Weight of stationary object
If thin film transistor circuits are used to reduce device size and weight, then portability is improved, but leakage current increases
Solution Approach 1:
Buffer circuits are introduced as intermediary elements between the driving circuits and the thin film transistor circuits. These buffer circuits act as mediators that isolate the leakage current effects in the thin film transistors from the main driving signals, preventing leakage from propagating and affecting overall circuit performance while maintaining the size and weight advantages of thin film transistor technology.
3Use of energy by moving object
If sequential light emitting method is used to reduce power consumption, then energy efficiency is improved, but timing control complexity increases
Solution Approach 1:
The sequential light emitting method implements periodic action by dividing the display refresh cycle into distinct time intervals where different driving circuits operate in sequence. Each driving circuit activates during its designated time period, creating a rhythmic, periodic operation pattern that simplifies timing control through regular intervals while maintaining low power consumption by ensuring only necessary circuits are active at any given moment.
4Illumination intensity
If simultaneous light emitting method is used to improve brightness, then luminance is improved, but power consumption increases
Solution Approach 1:
The driver enables dynamic operation by allowing flexible switching between sequential and simultaneous light emitting modes based on display requirements. The circuit configuration can be dynamically adjusted to activate either one driving circuit at a time (sequential) for power efficiency or multiple driving circuits concurrently (simultaneous) for maximum luminance, providing adaptive power management that optimizes the balance between brightness and power consumption.
Data Source
AI summary
The present invention relates to a driver and a display device including the same, wherein the driver includes: a first driving circuit generating a first output signal; a second driving circuit generating a second output signal; and at least one buffer circuit generating a third output signal of a voltage level corresponding to a gate-on voltage level of the first output signal or the second output signal when the first output signal or the second output signal is transmitted as a gate-on voltage level, and the buffer circuit includes a first transistor transmitting the voltage of the first level as the third output signal, and a second transistor transmitting the voltage of a second level turning off the first transistor and connected to the gate electrode of the first transistor.