Timing Controller for Display Charge Sharing

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Solution Overview

Problem

Display devices face challenges in reducing power consumption, particularly in the timing controller and source driver, which are not adequately addressed by existing technologies, and require innovative methods to optimize power usage based on pixel arrangement patterns and charge sharing connections.

Innovation Solution

A display device with a timing controller that divides display patterns into static and dynamic patterns, transmitting specific option information to the source driver to enable low power mode or adaptive charge sharing, thereby reducing power consumption by recognizing pixel arrangement patterns and controlling output buffers and intermediate driving voltage buffers accordingly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If the timing controller and source driver use conventional power consumption methods, then they can maintain stable operation, but power consumption is not reduced

Engineering Contradiction:

Improvepower consumption of timing controller and source driverVSAvoidstable operation

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The patent implements dynamic power consumption reduction by dividing display patterns into static and dynamic patterns, and by adaptively adjusting charge sharing operations based on pixel arrangement patterns. The timing controller dynamically selects between different power reduction modes (first power reduction mode for static patterns, second power reduction mode for dynamic patterns) to optimize power consumption while maintaining stable display operation.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes operational parameters of the source driver based on detected display patterns and pixel arrangements. It adjusts charge sharing operations, output buffer settings, and driving voltage levels according to the static or dynamic nature of the display content, thereby reducing power consumption without compromising display quality or operational stability.

Inventive Principle:

Principle #35Parameter changes

2Use of energy by moving object

If charge sharing is applied to reduce power consumption, then power usage decreases, but display quality may be compromised

Engineering Contradiction:

Improvepower consumptionVSAvoiddisplay quality

Core Design Contradiction:

Use of energy by moving objectVSManufacturing precision

Solution Approach 1:

The patent applies different charge sharing strategies to different regions and patterns of the display. It analyzes pixel arrangement patterns and applies appropriate power reduction techniques selectively - using more aggressive charge sharing for static regions and more conservative approaches for dynamic regions - thereby maintaining display quality while reducing overall power consumption.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent dynamically adjusts charge sharing operations based on the detected display pattern and pixel arrangement. The timing controller continuously monitors display content characteristics and adapts the charge sharing degree in real-time, ensuring display quality is maintained during dynamic content while enabling power reduction during static content.

Inventive Principle:

Principle #15Dynamics

3Use of energy by moving object

If the timing controller recognizes pixel arrangement patterns and transmits option information, then power consumption is reduced, but communication overhead increases

Engineering Contradiction:

Improvepower consumption of source driverVSAvoidcommunication time

Core Design Contradiction:

Use of energy by moving objectVSLoss of time

Solution Approach 1:

The timing controller performs pixel arrangement pattern recognition and determines optimal power reduction options in advance, before transmitting data to the source driver. By pre-processing this information and incorporating it into the data packets, the system avoids repeated communications and reduces overall communication overhead while enabling the source driver to implement power reduction strategies.

Inventive Principle:

Principle #10Preliminary action

4Adaptability or versatility

If the source driver supports multiple charge sharing connection structures, then adaptability improves, but device complexity increases

Engineering Contradiction:

Improvesupport for different charge sharing methodsVSAvoidsource driver structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent designs the source driver with universal support for multiple charge sharing connection structures (unique charge sharing connection and all-charge sharing connection). The timing controller transmits option information that indicates the pixel arrangement pattern, enabling the source driver to automatically adapt its charge sharing operation mode without requiring separate hardware implementations for different connection types.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12136372B2Timing controller for low power driving a display device using charge sharing based on pixel arrangement

Publication Date: 2024.11.05 SILICON WORKS CO LTD

AI summary

Disclosed are a display driver for a low power driving and a timing controller for the display device. The display device may include the timing controller configured to transmit a packet to which one of first option information corresponding to a static pattern or second option information corresponding to a dynamic pattern is applied, and a source driver configured to receive the packet and to perform a low power mode corresponding to the static pattern based on the first option information or adaptive charge sharing corresponding to the dynamic pattern based on the second option information.