Display Driving Circuit for Shared Discharge Rod Voltage Inversion

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Solution Overview

Problem

Existing display technologies using shared discharge rods experience issues of abnormal images due to interference on the integrated circuit bus, which connects the timing controller and power management chip, leading to disturbances from other modules.

Innovation Solution

A driving circuit and method that utilizes a timing controller and power management chip connected via separate pins to independently control shared discharge rods, inverting their voltages within a blanking time interval of each frame using level signals to avoid interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If integrated circuit bus communication is used between timing controller and power management chip, then voltage inversion of shared discharge rods can be realized, but the system is susceptible to disturbances from other modules causing abnormal images

Engineering Contradiction:

Improveimage display stabilityVSAvoidbus communication disturbance

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent extracts the voltage inversion control function from the shared integrated circuit bus and implements it through a dedicated direct connection between the timing controller and power management chip. This separates the critical voltage inversion signal from other bus traffic, eliminating disturbances from system chips or programming sockets that cause abnormal images.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent introduces a dedicated control line as an intermediary channel between the timing controller and power management chip. This separate communication path acts as a shielded channel that prevents interference from other modules while still enabling the necessary voltage inversion control signals to reach the power management chip reliably.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If multiple modules share the integrated circuit bus, then system integration is achieved, but communication reliability deteriorates due to signal disturbances

Engineering Contradiction:

Improvesystem integrationVSAvoidcommunication reliability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent segments the communication channels by creating a dedicated direct connection for voltage inversion control, separate from the shared integrated circuit bus. This segmentation allows the critical control signal to travel through a dedicated path while other modules continue to use the shared bus, maintaining system integration while ensuring communication reliability for the voltage inversion function.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS12633243B2Driving circuit, driving method, and display panel

Publication Date: 2026.05.19 TCL CHINA STAR OPTOELECTRONICS TECHNOLOGY CO LTD

AI summary

A driving circuit, a driving method, and a display panel are disclosed. The driving circuit includes: a timing controller including a first pin; a power management chip including a second pin; a first shared discharge rod, wherein the power management chip is electrically connected to the first shared discharge rod; a second shared discharge rod, wherein the power management chip is electrically connected to the second shared discharge rod. This can avoid issues of abnormal images on the display panel.