Input Device Backlight Color Adjustment Method

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Solution Overview

Problem

Conventional input devices with backlight functions consume high power due to the need to adjust gray levels across all color light-emitting elements simultaneously, lacking the ability to perform individual adjustments, which results in inefficiencies in power usage.

Innovation Solution

A method and device where power is selectively provided to individual color light-emitting elements, allowing for independent adjustment of chromaticity and luminance values to achieve consistent gray levels, thereby optimizing power consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If gray level adjustment process is performed on all color light-emitting elements simultaneously, then the luminance value and chromaticity value consistency is improved, but the overall power consumption increases

Engineering Contradiction:

Improvegray level consistencyVSAvoidpower consumption

Core Design Contradiction:

Manufacturing precisionVSUse of energy by moving object

Solution Approach 1:

The patent divides the backlight module into multiple independently controllable groups (first group with first color light-emitting elements, second group with second color light-emitting elements). Each group can undergo gray level adjustment independently rather than simultaneously adjusting all elements, allowing selective power management while maintaining overall consistency.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different groups of color light-emitting elements are assigned different characteristics (first group vs. second group with potentially different chromaticity and luminance properties). Each group is adjusted locally to achieve its target gray level, allowing optimized power distribution across different regions of the backlight module.

Inventive Principle:

Principle #3Local quality

2Device complexity

If conventional gray level adjustment process is used, then the adjustment process is simplified, but the ability to perform individual color light-emitting element adjustment is lost

Engineering Contradiction:

Improveadjustment process complexityVSAvoidindividual element adjustment capability

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The control system is segmented to independently manage different groups of color light-emitting elements. The controller can selectively activate and adjust the first group or second group based on power requirements, maintaining simplicity while enabling individual group adjustment capability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system dynamically switches between different operating modes: full-power mode (both groups active), power-saving mode (one group active), and intermediate modes. This dynamic adaptability allows the system to balance between adjustment simplicity and individual element control based on real-time power requirements.

Inventive Principle:

Principle #15Dynamics

3Illumination intensity

If all color light-emitting elements are activated, then the luminance output is sufficient, but the power consumption is high

Engineering Contradiction:

Improveluminance outputVSAvoidpower consumption

Core Design Contradiction:

Illumination intensityVSUse of energy by moving object

Solution Approach 1:

The backlight module is divided into multiple groups that can be independently activated. The controller can select to activate only the first group, only the second group, or both groups simultaneously, allowing luminance output to be adjusted in discrete steps while significantly reducing power consumption when full brightness is not required.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system implements partial activation of color light-emitting elements by selecting only the necessary group(s) based on current power requirements. This partial action approach provides sufficient luminance for typical usage scenarios while avoiding the excessive power consumption of activating all elements at full power.

Inventive Principle:

Principle #16Partial or excessive action

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 enhances power-saving efficacy by allowing precise control over light emission, reducing errors in luminance and chromaticity values, and achieving a power savings of approximately 41% in the white light mode.

Implementation Method 1

the red light-emitting unit, the green light-emitting unit and the blue light-emitting unit generates a first mixed white light beam

Methodology Applied

Scientific EffectLight mixing:

Data Source

PatentUS11706859B2Input device with backlight function and backlight color adjustment method thereof

Publication Date: 2023.07.18 PRIMAX ELECTRONICS LTD

AI summary

An input device with a backlight function and a backlight color adjustment method are provided. The input device with the backlight function includes a casing, plural color light-emitting elements, a control module and a charge-coupled device. The control module provides electric power to at least two selected color light-emitting elements through a power supply circuit. By the control module, the chromaticity value of a mixed white light beam from the color light-emitting element is adjusted to be consistent with the chromaticity value of a white light beam, and the luminance value of the mixed white light beam from the color light-emitting element is adjusted to be consistent with the luminance value of the white light beam.