Display Device Black Insertion Power Control

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Solution Overview

Problem

Existing display devices face challenges in reducing power consumption while maintaining display quality, as automatic luminosity adjustment can lead to flash phenomena due to sudden luminosity changes between frames, and traditional methods require frame memory, increasing production costs.

Innovation Solution

A display device with a controller that calculates a luminosity adjustment factor based on previous frame power consumption, applying it to subsequent frames to prevent flash phenomena and reduce power consumption through black insertion techniques, without the need for frame memory.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If automatic luminosity adjustment is implemented to reduce power consumption, then power consumption is reduced, but flash phenomena occur due to sudden luminosity changes between frames

Engineering Contradiction:

Improvepower consumptionVSAvoidflash phenomena

Core Design Contradiction:

Use of energy by moving objectVSObject-affected harmful factors

Solution Approach 1:

The patent applies preliminary action by calculating the luminosity adjustment factor based on the power consumption of the previous frame before displaying the current frame. This allows the system to proactively adjust luminosity to prevent flash phenomena rather than reacting after they occur. The controller computes the adjustment factor in advance using the formula involving previous frame power consumption, ensuring smooth transitions between frames.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements feedback by using the power consumption information from the previous frame to determine the luminosity adjustment factor for the current frame. This creates a closed-loop control system where the output of one frame (power consumption) feeds back into the input of the next frame (luminosity adjustment), enabling dynamic adaptation that prevents flash phenomena while reducing overall power consumption.

Inventive Principle:

Principle #23Feedback

2Object-affected harmful factors

If frame memory is used to adjust luminosity between frames, then flash phenomena are prevented, but production costs increase

Engineering Contradiction:

Improveflash phenomenaVSAvoidproduction costs

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The patent extracts only the essential information needed for luminosity adjustment (power consumption data from the previous frame) rather than storing entire frame images. By taking out only the necessary power consumption parameter and using it to calculate the luminosity adjustment factor, the system prevents flash phenomena without requiring expensive frame memory hardware.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent uses a computationally lightweight approach that replaces expensive frame memory with simple power consumption calculations. The luminosity adjustment factor is computed on-the-fly using a mathematical formula based on previous frame power consumption, eliminating the need for costly memory hardware while achieving the same flash prevention effect.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Use of energy by moving object

If luminosity is reduced to decrease power consumption, then energy efficiency improves, but display quality may deteriorate

Engineering Contradiction:

Improvepower consumptionVSAvoiddisplay quality

Core Design Contradiction:

Use of energy by moving objectVSIllumination intensity

Solution Approach 1:

The patent applies dynamics by making the luminosity adjustment factor variable and adaptive rather than fixed. The adjustment factor dynamically changes based on the power consumption characteristics of each previous frame, allowing the system to optimize the balance between power consumption and display quality for each specific situation rather than applying a constant reduction.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the luminosity parameter dynamically by calculating the luminosity adjustment factor using power consumption data from the previous frame. This parameter change approach allows the system to adjust display brightness in response to actual power consumption patterns, maintaining display quality while reducing overall energy usage.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS11170712B2Display device for adjusting black insertion for reducing power consumption

Publication Date: 2021.11.09 MAGNOLIA WHITE CORP

AI summary

According to one embodiment, a display device includes a display panel in which pixel units are arranged, and a controller configured to generate image signals by multiplying display data externally supplied to each line by a luminosity adjustment factor, to supply the generated image signals to the pixel units, to accumulate power consumption of each line, and to execute black insertion if the accumulated power consumption is determined to be greater than power consumption of one previous display frame by a predetermined value, wherein the luminosity adjustment factor is acquired by substituting the power consumption of one previous frame to a decreasing function, and a display pattern including a plurality of continuing black display lines is synchronized with supply of the image signals and is displayed moving the same direction of a screen scanning direction of the display panel during the black insertion.