Single-Chip Display Driver Circuit Resolution Control

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Solution Overview

Problem

Conventional display devices require software settings in the host to set the resolution, leading to increased chip size and power consumption due to complex circuits needed for multi-resolution capabilities.

Innovation Solution

A single-chip display driving circuit with a resolution-type generator, timing controller, source driving circuit, and gate driving circuit, which includes an interface circuit to buffer signals, allowing for the generation of source and gate driving signals based on a resolution selecting code stored in nonvolatile memory, enabling the display panel to set multiple resolutions independently without software host settings.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If software setting in the host is used to set resolution, then resolution setting capability is achieved, but chip size and power consumption increase due to complicated circuits

Engineering Contradiction:

Improveresolution setting capabilityVSAvoidcircuit complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The resolution setting function is extracted from the host software and transferred to a dedicated resolution-type generator circuit within the display device. This generator receives a simple resolution selecting code and autonomously generates the appropriate resolution-type signal, eliminating the need for complex host software analysis circuits while maintaining multi-resolution capability.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The display device's own circuitry (resolution-type generator and timing controller) performs the resolution setting function independently without relying on external host software. The circuit uses a simple resolution selecting code input to self-determine and configure the appropriate resolution, reducing external dependencies and internal circuit complexity.

Inventive Principle:

Principle #25Self-service

2Adaptability or versatility

If complicated circuits are added to set resolution, then multi-resolution capability is achieved, but power consumption increases

Engineering Contradiction:

Improvemulti-resolution capabilityVSAvoidpower consumption

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

The complex resolution analysis function is extracted from the main processing circuitry and replaced with a dedicated resolution-type generator that uses a simple resolution selecting code. This specialized circuit consumes significantly less power than general-purpose software-based resolution detection while achieving the same multi-resolution capability.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The system changes from software-based resolution detection to hardware-based resolution selecting code input. By using a simplified parameter (resolution selecting code) instead of complex image data analysis, the power consumption of the resolution setting function is dramatically reduced while maintaining the ability to support multiple resolutions.

Inventive Principle:

Principle #35Parameter changes

3Ease of operation

If resolution setting is done through host software, then flexibility is maintained, but chip size increases

Engineering Contradiction:

Improveresolution setting flexibilityVSAvoidchip size

Core Design Contradiction:

Ease of operationVSArea of stationary object

Solution Approach 1:

The resolution setting function is extracted from the host system and implemented as a compact dedicated circuit (resolution-type generator) within the display chip. This generator uses a simple resolution selecting code to determine resolution, requiring minimal chip area compared to software-based approaches while maintaining operational flexibility.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent replaces the mechanical/software-based resolution setting approach with a streamlined hardware circuit approach. The resolution-type generator circuit directly processes the resolution selecting code to generate the appropriate resolution-type signal, eliminating the need for software execution and associated overhead, thereby reducing chip area while preserving flexibility.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS8339430B2Single-chip display-driving circuit, display device and display system having the same

Publication Date: 2012.12.25 SAMSUNG ELECTRONICS CO LTD

AI summary

Display devices include a display driving circuit, which is configured to generate a source driving signal and a gate driving signal in response to image data and horizontal and vertical sync signals. This display driving circuit includes a resolution-type generator, a timing controller, a source driving circuit and a gate driving circuit. The resolution-type generator is configured to generate a resolution-type signal in response to a resolution selecting code and the timing controller is configured to generate first image data, a source driver control signal and a gate driver control signal in response to the resolution-type signal, the image data and the horizontal and vertical sync signals. The source driving circuit is configured to generate the source driving signal in response to grayscale voltages, the first image data and the source driver control signal. The gate driving circuit is configured to generate the gate driving signal in response to the gate driver control signal.