Driver Device Buffer Segmentation for Display Panel Power Reduction

Resolve Bottlenecks,
Find Innovative Solutions
Generate Solutions

Solution Overview

Problem

As display panel sizes increase, the source driver IC must output higher frequency drive voltages, leading to higher power consumption and heat generation, which reduces the component's lifetime.

Innovation Solution

A driver device and method that select and utilize specific positive and negative output buffer modules based on drive signal polarity and magnitude, effectively lowering the frequency of drive voltage output from the source driver IC, reducing power consumption and heat dissipation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the source driver IC outputs higher frequency drive voltage to drive larger display panels, then the driving capability is improved, but power consumption increases and heat generation increases

Engineering Contradiction:
Improvedriving capabilityVSAvoidpower consumption
Core Design Contradiction:
ProductivityVSUse of energy by moving object

Solution Approach 1:

The patent segments the output buffer into multiple independent buffer modules (first buffer module, second buffer module, third buffer module, fourth buffer module), each capable of operating at different frequencies. This allows the system to use only the necessary buffer modules for the current display panel size, avoiding the need to operate all buffers at high frequency, thus reducing overall power consumption while maintaining the required driving capability.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent implements dynamic frequency adjustment by selectively activating different buffer modules based on the display panel size. The control module dynamically selects which buffer modules to operate and at what frequency, allowing the system to adapt its power consumption and driving capability to the actual requirements, rather than operating at fixed high frequency for all cases.

Inventive Principle:
Principle #15Dynamics

2Productivity

If the source driver IC outputs higher frequency drive voltage to drive larger display panels, then the driving capability is improved, but heat generation increases

Engineering Contradiction:
Improvedriving capabilityVSAvoidheat generation
Core Design Contradiction:
ProductivityVSTemperature

Solution Approach 1:

By dividing the output buffer into multiple independent buffer modules with different operating frequencies, the system can segment the heat generation source. Only the necessary buffer modules are activated at high frequency, while others operate at lower frequencies or remain inactive, thereby reducing total heat generation while maintaining adequate driving capability for the display panel size.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The control module dynamically adjusts the operating frequency and activation state of different buffer modules based on the display panel size, enabling the system to optimize the balance between driving capability and heat generation. This dynamic adjustment prevents excessive heat generation by avoiding unnecessary high-frequency operation of all buffer modules.

Inventive Principle:
Principle #15Dynamics

3Productivity

If the source driver IC outputs higher frequency drive voltage to drive larger display panels, then the driving capability is improved, but the lifetime of the source driver IC is reduced

Engineering Contradiction:
Improvedriving capabilityVSAvoidlifetime
Core Design Contradiction:
ProductivityVSDuration of action of stationary object

Solution Approach 1:

The patent segments the buffer operation into multiple independent modules with different frequency capabilities. This segmentation allows the system to distribute the high-frequency operation load across only the necessary modules rather than stressing all modules continuously, thereby reducing cumulative stress and heat exposure on individual components and extending the overall lifetime of the source driver IC.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

By dynamically selecting and activating only the necessary buffer modules based on display panel size, the system reduces the cumulative operating stress and heat exposure on the source driver IC components. This dynamic load management decreases the degradation rate of the IC components, thereby extending their operational lifetime while maintaining the required driving capability.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentUS11120721B2Driver device and driving method for display panel
Publication Date: 2021.09.14 HKC CORP LTD
  • US11120721B2 patent drawing
  • US11120721B2 patent drawing
  • US11120721B2 patent drawing

AI summary

The present disclosure illustrates a driver device and a driving method for a display panel. The driver device includes a source driver module, M positive output buffer modules, a positive input selection module, a positive output selection module, N negative output buffer modules, a negative input selection module and a negative output selection module. The driver device selects, according to the drive polarity and magnitude of the inputted drive signal, the corresponding positive output buffer module or negative output buffer module for data buffering of the display panel.