Gamma Correction Device Using Single Photo-Sensor Averaging

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Solution Overview

Problem

Current gamma correction methods for flat display devices are time-consuming and costly due to the need for multiple optical instruments and high programming error rates, leading to increased production costs and complexity.

Innovation Solution

A system and method that uses a brightness detection unit to alternately and repetitively detect brightness information from images at two gray scale levels, averaging this information to select gamma correction data for correcting gamma voltages, thereby simplifying the gamma correction process and reducing production costs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If the gamma programming correction method is used with multiple optical instruments and measuring points, then gamma correction accuracy is improved, but the correction time period increases and device complexity increases

Engineering Contradiction:

Improvegamma correction accuracyVSAvoidcorrection time period

Core Design Contradiction:

Manufacturing precisionVSLoss of time

Solution Approach 1:

The patent extracts only the essential measurement function by using a single optical instrument instead of multiple instruments. It takes out the redundant measuring points and keeps only one measurement point, thereby reducing the correction time while maintaining acceptable accuracy through the extracted essential measurement approach.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent applies preliminary action by pre-programming the gamma correction values into the gamma IC before production. This allows the correction data to be prepared in advance, eliminating the need for time-consuming real-time measurements and calculations during the correction process.

Inventive Principle:

Principle #10Preliminary action

2Manufacturing precision

If the gamma programming correction method is used with multiple optical instruments, then gamma correction accuracy is improved, but device complexity and production cost increase

Engineering Contradiction:

Improvegamma correction accuracyVSAvoidgamma correction device complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent merges the functions of multiple optical instruments into a single optical instrument. By combining the measurement capabilities into one device, it reduces device complexity and production cost while still achieving the necessary gamma correction accuracy through optimized measurement and calculation algorithms.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The single optical instrument is designed to perform multiple functions: measuring brightness at different gray levels, collecting measurement data, and working with the gamma IC programming process. This multi-functionality replaces the need for multiple specialized instruments, reducing overall device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Manufacturing precision

If multiple measuring points are used for gamma correction, then gamma correction accuracy is improved, but the incidence of programming error increases

Engineering Contradiction:

Improvegamma correction accuracyVSAvoidprogramming error rate

Core Design Contradiction:

Manufacturing precisionVSReliability

Solution Approach 1:

The patent takes out the multiple measuring points and uses only a single measurement point for gamma correction. This extraction of the essential measurement function reduces the complexity of data collection and processing, thereby lowering the incidence of programming errors while maintaining sufficient correction accuracy.

Inventive Principle:

Principle #2Taking out (Extraction)

4Device complexity

If a single optical instrument is used for brightness detection, then device complexity is reduced, but measurement precision may be insufficient

Engineering Contradiction:

Improvegamma correction device complexityVSAvoidbrightness detection precision

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent replaces complex mechanical measurement systems with optimized computational methods. By using precise calculation algorithms to process the brightness measurements from the single optical instrument, it compensates for the simpler hardware and achieves sufficient measurement precision for gamma correction.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This approach shortens the gamma correction time period, improves efficiency and reliability, and simplifies the gamma correction device, reducing production costs by using a single photo-sensor for brightness detection and averaging data to calculate correction coefficients for gamma voltage adjustment.

Implementation Method 1

a brightness detection unit for detecting pieces of brightness information from images displayed with at least two gray scale levels on a display panel

Methodology Applied

Scientific EffectPhotoelectric Effect: Photoelectric Effect

Data Source

PatentUS8638323B2System and method for correcting gamma

Publication Date: 2014.01.28 LG DISPLAY CO LTD

AI summary

Disclosed is a system and method for correcting a gamma for shortening a gamma correction time period and improving gamma correction efficiency and reliability thereof, and simplifying a gamma correction device for reducing a production cost of image display devices.