Display Driver Data Inversion for Lower Source IC Power

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Solution Overview

Problem

As the resolution of display devices increases, the number of source driver ICs and level shifters also increases, leading to higher current consumption and power consumption in source driver ICs.

Innovation Solution

A display driving device with a reception circuit, transmission control circuit, and data processing circuit that includes an inversion circuit to bypass or invert display data based on comparison with target data values, reducing power consumption by minimizing the need for level shifters.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If the resolution of display device is increased, then the display quality is improved, but the number of source driver ICs and level shifters increases leading to higher power consumption

Engineering Contradiction:

Improvedisplay qualityVSAvoidpower consumption

Core Design Contradiction:

Illumination intensityVSUse of energy by moving object

Solution Approach 1:

The patent applies data inversion by comparing display data with target data values and inverting specific data values when they match the target. This inversion technique allows the system to reduce the number of level shifters needed while maintaining display quality, thereby reducing power consumption without sacrificing resolution

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent changes the parameter of data representation by inverting specific data values based on comparison with target data. This parameter change enables the system to optimize power consumption by reducing level shifter operations while maintaining the required display resolution and quality

Inventive Principle:

Principle #35Parameter changes

2Productivity

If the number of level shifters is increased to support higher resolution, then the data transmission capability is improved, but the current consumption and power consumption increase

Engineering Contradiction:

Improvedata transmission capabilityVSAvoidcurrent consumption

Core Design Contradiction:

ProductivityVSUse of energy by moving object

Solution Approach 1:

By inverting specific display data values based on comparison with target data, the system reduces the need for level shifter operations. This inversion approach maintains data transmission capability while significantly reducing the current consumption of level shifters

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent extracts and processes only the specific data values that require inversion, rather than processing all data through level shifters. This selective processing reduces the workload on level shifters and decreases current consumption while maintaining full data transmission capability

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS20250356792A1Display driving device for reducing power consumption and operating method thereof

Publication Date: 2025.11.20 LX SEMICON CO LTD

AI summary

A display driving device is disclosed. The display driving device comprises: a reception circuit for receiving first display data including data values of a first group; a transmission control circuit that outputs the first display data or outputs second display data including data values of a second group, according to a result of comparing the data values of the first group with target data values; and a data processing circuit for processing the first display data or the second display data output from the transmission control circuit, wherein the transmission control circuit comprises an inverting circuit that: if the data values of the first group are not the same as the target data values, respectively, bypasses the first display data to the data processing circuit; if the data values of the first group are the same as the target data values, respectively, converts the data values of the first group respectively into the data values of the second group, which have values complementary to the data values of the first group, respectively; and outputs the second display data including the data values of the second group to the data processing circuit.