Source Driver Sensing Circuit for Display Pixel Deviation Correction

Solution Overview

Problem

High-resolution display panels face challenges in reducing the time and data transmission required for sensing pixel deviations, leading to increased complexity and cost in the timing controller, particularly due to the need for rapid and efficient transmission of large amounts of sensing data from the source driver to the timing controller.

Innovation Solution

A source driver with a sensing circuit that performs pre-processing on pixel data to generate reduced-bit sensing data, which is then transmitted to a timing controller for post-processing, allowing for shared correction and reduced data transmission time and manufacturing costs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If high-resolution display panels are used to increase display quality, then display resolution is improved, but the transmission time of sensing data increases and the amount of sensing data to be transmitted increases

Engineering Contradiction:

Improvedisplay resolutionVSAvoidtransmission time of sensing data

Core Design Contradiction:

Manufacturing precisionVSLoss of time

Solution Approach 1:

The invention extracts and transmits only the essential sensing data (pixel deviation information) rather than the complete high-resolution pixel data. By identifying and transmitting only the deviation components that need correction, the data transmission volume is significantly reduced while maintaining the ability to compensate for pixel characteristics in high-resolution displays.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The sensing circuit performs preliminary processing to identify pixel deviations before data transmission. By pre-processed the sensing data to extract only the necessary correction information, the system prepares the data in advance for efficient transmission and subsequent correction by the timing controller.

Inventive Principle:

Principle #10Preliminary action

2Manufacturing precision

If high-resolution display panels are used to increase display quality, then display resolution is improved, but the amount of sensing data to be transmitted increases

Engineering Contradiction:

Improvedisplay resolutionVSAvoidamount of sensing data

Core Design Contradiction:

Manufacturing precisionVSQuantity of substance

Solution Approach 1:

The invention extracts and transmits only the essential sensing data (pixel deviation information) rather than the complete high-resolution pixel data. By identifying and transmitting only the deviation components that need correction, the data transmission volume is significantly reduced while maintaining the ability to compensate for pixel characteristics in high-resolution displays.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The sensing circuit performs preliminary processing to identify pixel deviations before data transmission. By pre-processed the sensing data to extract only the necessary correction information, the system prepares the data in advance for efficient transmission and subsequent correction by the timing controller.

Inventive Principle:

Principle #10Preliminary action

3Measurement precision

If the timing controller processes all sensing data independently, then correction accuracy is improved, but manufacturing cost and mass production time increase

Engineering Contradiction:

Improvecorrection accuracyVSAvoidmanufacturing cost and mass production time of timing controller

Core Design Contradiction:

Measurement precisionVSEase of manufacture

Solution Approach 1:

The invention segments the data processing function between the source driver (sensing and preliminary processing) and the timing controller (correction processing). By dividing the processing tasks, the timing controller only needs to handle the reduced deviation data for correction, reducing its complexity and manufacturing requirements while maintaining correction accuracy.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention introduces an intermediary processing stage in the sensing circuit that prepares deviation data before transmission to the timing controller. This intermediary processing reduces the data burden on the timing controller, allowing it to focus on the essential correction function with reduced complexity.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS10964271B2Sensing circuit of source driver and display device using the same

Publication Date: 2021.03.30 SILICON WORKS CO LTD

AI summary

Disclosed are a source driver and a display device using the same, and the display device includes the source driver that generates sensing data by performing a pre-processing operation on pixel data obtained by sensing display pixels, and a timing controller that generates correction data for correction for pixel characteristics by performing a post-processing operation on the sensing data.