Luminance Range Correction for Video Displays

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional video display devices correct luminance ranges by setting a single target luminance value, leading to significant luminance reduction and unnatural luminance differences between corrected and non-corrected areas, failing to adapt to user preferences.

Innovation Solution

A video display device with a user interface that allows input of correction level information, a storage unit for storing correction values, and a main control unit that calculates optimized luminance range correction values based on ideal luminance distribution characteristics, enabling smooth luminance range adjustments without large reductions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If 100% luminance range correction is applied to eliminate all luminance ranges, then luminance uniformity is improved, but overall luminance is greatly reduced

Engineering Contradiction:

Improveluminance uniformityVSAvoidoverall luminance

Core Design Contradiction:

Stability of the object's compositionVSIllumination intensity

Solution Approach 1:

The patent applies dynamics by making the correction level adjustable rather than fixed at 100%. The main control unit dynamically adapts the correction degree based on user input through the user interface, allowing the system to transition between full correction (100% correction level) and partial correction (0-99% correction level), thus balancing luminance uniformity and overall luminance according to user needs

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter of correction level from a fixed value to a variable parameter that can be adjusted by users. The storage unit stores correction values corresponding to different correction levels (0-100%), and the main control unit selects appropriate correction values based on the input correction level, enabling flexible control over the trade-off between luminance uniformity and overall luminance

Inventive Principle:

Principle #35Parameter changes

2Device complexity

If a single target luminance value is set for correction, then correction simplicity is improved, but adaptability to user preferences deteriorates

Engineering Contradiction:

Improvecorrection control simplicityVSAvoiduser preference adaptability

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent segments the correction control into multiple discrete correction levels (0-100%) with corresponding correction values stored in the storage unit. Instead of using a single target luminance value, the system divides the correction range into multiple segments, each with pre-calculated correction values, allowing users to select from various correction degrees while maintaining simple operation through the user interface

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system transitions from a static single target value approach to a dynamic multi-level correction system. The main control unit dynamically selects appropriate correction values from the storage unit based on the correction level input by the user, enabling the system to adapt to different user preferences while maintaining operational simplicity

Inventive Principle:

Principle #15Dynamics

3Stability of the object's composition

If luminance range correction is applied to eliminate luminance ranges in corrected areas, then luminance uniformity in corrected areas is improved, but unnatural luminance differences appear at boundaries between corrected and non-corrected areas

Engineering Contradiction:

Improveluminance uniformity in corrected areaVSAvoidboundary luminance differences

Core Design Contradiction:

Stability of the object's compositionVSObject-generated harmful factors

Solution Approach 1:

The patent applies local quality by allowing different correction levels to be applied to different regions implicitly through the correction values. When partial correction (0-99% correction level) is applied, the correction values are adjusted accordingly, creating a gradual transition effect that reduces sharp boundaries and unnatural luminance differences while still improving luminance uniformity in the corrected areas

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS8279352B2Video display device and luminance range correction method

Publication Date: 2012.10.02 SHARP KK

AI summary

In a video display device of the present invention, a main control unit is equipped with a user interface for varying correction values set to a range correction unit and controls a range correction unit by acquiring the corresponding correction values from a storage unit in accordance with correction level information input by the user interface. The storage unit stores range correction values for the video display unit in correspondence with each piece of the correction level information input by the user interface. Thus, it is possible to correct luminance ranges to suit the user's preference without causing a large luminance reduction.