Integrated Power Management Chip for Display Devices

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Solution Overview

Problem

Current power management devices for display devices are redundant in structure, making them unsuitable for modern lightweight electronic equipment, as they require external components for generating target operating voltages and gamma correction voltages, leading to increased complexity and size.

Innovation Solution

A power management device with an initial voltage input terminal, a power management circuit including follower amplifier sub-circuits, and multiple gamma correction circuits that generate target operating and gamma correction voltages internally, integrating these functions into a single chip to simplify the structure and enhance compactness.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If external components are used to generate target operating voltages and gamma correction voltages, then the power management device can provide stable voltage output, but the device complexity and size increase

Engineering Contradiction:

Improvevoltage output stabilityVSAvoiddevice structure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines the power management circuit and gamma correction circuits into a single integrated chip. The power management circuit includes a power management sub-circuit and a gamma correction sub-circuit, which are merged at the circuit level to eliminate the need for separate external components. This integration maintains voltage stability while reducing device complexity and size.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The integrated power management chip performs multiple functions: it generates target operating voltages through the power management sub-circuit and simultaneously generates gamma correction voltages through the gamma correction sub-circuit. This multi-functional design eliminates the need for separate dedicated components for each function, reducing overall device complexity while maintaining reliable voltage output.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If external components are used for voltage generation, then the power management device can provide sufficient functionality, but the device size increases

Engineering Contradiction:

ImprovefunctionalityVSAvoiddevice size

Core Design Contradiction:

Adaptability or versatilityVSVolume of moving object

Solution Approach 1:

The patent integrates the power management circuit and gamma correction circuits into a single chip, merging previously separate functional blocks. This consolidation maintains all necessary functionalities (voltage generation and gamma correction) while significantly reducing the device volume by eliminating the need for multiple separate components and their interconnections.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The gamma correction sub-circuit is nested within the power management chip structure, with the gamma correction circuits embedded in the integrated circuit. This nesting approach allows multiple functional layers to coexist in a compact arrangement, maintaining full functionality while minimizing the overall device footprint.

Inventive Principle:

Principle #7Nested doll (Nesting)

3Device complexity

If the power management device is integrated into a single chip, then the device complexity and size are reduced, but the internal circuit design becomes more challenging

Engineering Contradiction:

Improvedevice structure complexityVSAvoidinternal circuit design difficulty

Core Design Contradiction:

Device complexityVSDifficulty of detecting and measuring

Solution Approach 1:

The integrated power management chip is segmented into distinct functional sub-circuits: a power management sub-circuit containing voltage generation circuits, and a gamma correction sub-circuit containing gamma correction circuits. This segmentation organizes the complex internal design into manageable modules, making the integrated circuit easier to design, verify, and manufacture while maintaining the benefits of integration.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS11488507B2Power management device and display device

Publication Date: 2022.11.01 BEIJING BOE DISPLAY TECH CO LTD

AI summary

The present disclosure provides a power management device, including an initial voltage input terminal, a power management circuit, and a plurality of gamma correction circuits. The initial voltage input terminal is configured to provide an initial voltage; the power management circuit includes at least one follower amplifier sub-circuit, each follower amplifier sub-circuit is configured to output a corresponding target operating voltage according to the initial voltage, a reference voltage, and a target operating voltage setting parameter; and each gamma correction circuit is configured to output a corresponding gamma correction voltage according to the initial voltage, the reference voltage, and a corresponding gamma parameter. The present disclosure further provides a display device.