Backlight Module Light Intensity Ratio Control
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Solution Overview
Problem
Existing display apparatuses cannot efficiently adjust image brightness and color performance under different conditions, leading to increased power consumption and hardware costs, as they can only adjust backlight module brightness and not color gamut, and LEDs with higher color gamut have lower photoelectric conversion efficiency.
Innovation Solution
A display apparatus with a backlight module comprising two light-emitting units of different photoelectric conversion efficiencies and color gamuts, where the light intensity ratios are dynamically adjusted based on user requirements, application types, environmental brightness, and remaining power, using a processing unit to control the light-emitting units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If LEDs with larger covering color gamut are used to satisfy user demand for more colourful screen, then display chroma is improved, but photoelectric conversion efficiency decreases and power consumption increases
Solution Approach 1:
The backlight module is divided into multiple light-emitting units, each with different color gamut characteristics. The system segments the lighting function across units with varying photoelectric conversion efficiencies and color gamuts, allowing selective activation based on display requirements.
Solution Approach 2:
The patent implements dynamic adjustment of light intensity ratios among different light-emitting units based on real-time detection of display content characteristics. The control unit dynamically modifies the operating parameters of each unit to optimize the balance between color gamut and power consumption.
2Ease of operation
If existing display apparatus adjusts only backlight module brightness, then brightness control is simplified, but color gamut adjustment capability is lost
Solution Approach 1:
The system dynamically adjusts both brightness and color gamut by varying the intensity ratios of different light-emitting units. The control unit receives display content characteristics and real-time feedback to dynamically modify multiple parameters simultaneously, enabling flexible adaptation to different display scenarios.
Solution Approach 2:
The patent changes multiple operating parameters including both brightness level and color gamut by adjusting the intensity ratios of different light-emitting units. This multi-parameter adjustment allows the system to adapt to various display requirements while maintaining user-friendly operation through automated control.
3Adaptability or versatility
If all light sources use LEDs with larger covering color gamut, then display color performance is improved, but hardware cost increases
Solution Approach 1:
The backlight module incorporates multiple light-emitting units with different cost and performance characteristics. By segmenting the lighting function across units with varying specifications, the system achieves cost-effective hardware design while maintaining excellent display color performance through selective activation.
Solution Approach 2:
The system changes the effective parameters of the backlight module by dynamically adjusting which light-emitting units are active and at what intensity levels. This allows the hardware to deliver high color performance when needed while using more cost-effective units during normal operation, optimizing the balance between hardware cost and display color performance.
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 solution allows for effective adjustment of image brightness and color performance across various situations, reducing power consumption and hardware costs by optimizing the use of light-emitting units based on specific conditions.
Implementation Method 1
a first light-emitting unit and a second light-emitting unit, wherein a photoelectric conversion efficiency of the first light-emitting unit is higher than a photoelectric conversion efficiency of the second light-emitting unit
Data Source
AI summary
A display apparatus and a method for controlling a backlight module thereof are provided. The display apparatus includes the backlight module, an input unit and a processing unit. A light-emitting device of the backlight module includes a first light-emitting unit and a second light-emitting unit. A photoelectric conversion efficiency of the first light-emitting unit is higher than that of the second light-emitting unit, and a covering color gamut of the second light-emitting unit is larger than that of the first light-emitting unit. The input unit generates an input signal. The processing unit is coupled to the input unit and configured to receive the input signal generated by the input unit, and the processing unit is coupled to the backlight module, and dynamically adjusts respective light intensity ratios of the first light-emitting unit and the second light-emitting unit according to the received input signal.