Power Driver Amplifier Turn-Off for Standby Power Reduction

Solution Overview

Problem

Display apparatuses in mobile devices consume excessive power in standby mode due to continuous operation of power and source drivers, even when only partial images are displayed.

Innovation Solution

A power driver and source driver configuration that includes boosters and amplifiers, which are specifically designed to turn off amplifiers in standby mode, using interconnections to apply only necessary voltages for minimal gray level data, thereby reducing power consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If amplifiers operate continuously in standby mode to maintain voltage supply, then image display capability is preserved, but power consumption increases

Engineering Contradiction:

Improveimage display capabilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system dynamically adjusts amplifier operation based on display mode. In standby mode, only necessary amplifiers are activated while others are turned off. In normal display mode, all amplifiers operate. This dynamic configuration allows the system to adapt power consumption to actual display requirements, resolving the contradiction between maintaining display capability and reducing power usage.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

In standby mode, the system applies partial action by activating only the minimum necessary amplifiers required for basic display functions rather than operating all amplifiers. This selective activation reduces power consumption while maintaining sufficient image display capability for standby content such as clocks or notifications.

Inventive Principle:

Principle #16Partial or excessive action

2Use of energy by moving object

If all amplifiers are turned off in standby mode to reduce power consumption, then power usage decreases, but voltage supply for full image display is compromised

Engineering Contradiction:

Improvepower consumptionVSAvoidvoltage supply capability

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The system dynamically adjusts amplifier operation based on display mode. In standby mode, only necessary amplifiers are activated while others are turned off. In normal display mode, all amplifiers operate. This dynamic configuration allows the system to adapt power consumption to actual display requirements, resolving the contradiction between maintaining display capability and reducing power usage.

Inventive Principle:

Principle #15Dynamics

3Measurement precision

If amplifiers operate in standby mode to maintain all voltage levels, then gray level accuracy is preserved, but energy waste increases

Engineering Contradiction:

Improvegray level accuracyVSAvoidenergy waste

Core Design Contradiction:

Measurement precisionVSLoss of energy

Solution Approach 1:

In standby mode, the system applies partial action by activating only the minimum necessary amplifiers required for basic display functions rather than operating all amplifiers. This selective activation reduces power consumption while maintaining sufficient image display capability for standby content such as clocks or notifications.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS8860704B2Power driver, source driver, and display apparatus including the drivers

Publication Date: 2014.10.14 SAMSUNG DISPLAY CO LTD

AI summary

A power driver, a source driver, and a display apparatus including the drivers, may reduce standby mode power consumption. The power driver includes a plurality of boosters and a plurality of amplifiers. The power driver is configured to apply a voltage for driving a display apparatus. The power driver is configured to turn off all the plurality of amplifiers when the display apparatus is in a standby mode.