Center-Weighted Local Dimming Backlight for Resolution and Power
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Solution Overview
Problem
Existing display devices face challenges in balancing power consumption, resolution, and contrast ratio due to the uniform size of unit blocks in local dimming, leading to increased manufacturing costs and decreased image quality in peripheral areas.
Innovation Solution
The display device divides the screen into different-sized unit blocks, with smaller blocks in the central area and larger blocks in the outer area, using distinct driving voltages to control backlight units, thereby reducing the number of LEDs and optimizing power usage while enhancing resolution and contrast.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the size of the unit block becomes smaller to increase dimming resolution, then the resolution is improved, but the number of LEDs increases resulting in increased manufacturing cost and power consumption
Solution Approach 1:
The patent applies local quality by dividing the display screen into different regions (central region and peripheral region) and assigning different unit block sizes to each region. The central region uses smaller unit blocks for higher dimming resolution, while the peripheral region uses larger unit blocks to reduce LED count and power consumption. This resolves the contradiction by making resolution high only where it is most needed.
Solution Approach 2:
The patent segments the display area into multiple regions with different characteristics. By segmenting the screen into central and peripheral regions with different unit block sizes, the system achieves high resolution in the important central area while reducing overall LED requirements and power consumption in the less critical peripheral areas.
2Measurement precision
If the size of the unit block becomes smaller to increase dimming resolution, then the resolution is improved, but the number of LEDs increases resulting in increased manufacturing cost
Solution Approach 1:
The patent implements local quality by applying different unit block sizes to different regions of the display. The central region receives smaller unit blocks for high resolution, while the peripheral region uses larger unit blocks, reducing the total number of LEDs required and thereby lowering manufacturing costs.
Solution Approach 2:
The display is segmented into central and peripheral regions with different resolution requirements. This segmentation allows the system to use smaller unit blocks only where necessary for high-quality viewing, while using larger, more cost-effective unit blocks in the periphery, thus reducing overall manufacturing cost.
3Use of energy by moving object
If the size of the unit block increases to reduce the number of LEDs, then power consumption is reduced, but the resolution decreases causing decreased contrast ratio in the peripheral area
Solution Approach 1:
The patent applies local quality by matching unit block size to the importance of the display region. The central region uses smaller unit blocks for high resolution, while the peripheral region uses larger unit blocks that consume less power, achieving an optimal balance between resolution and power consumption in different areas.
Solution Approach 2:
The display is segmented into central and peripheral regions with different resolution and power requirements. This allows the system to optimize each region independently - high resolution in the central area and low power consumption in the peripheral area - resolving the contradiction between these two parameters.
4Ease of manufacture
If the size of the unit block increases to reduce the number of LEDs, then manufacturing cost is reduced, but the resolution decreases causing decreased contrast ratio
Solution Approach 1:
The patent implements local quality by providing high resolution only in the central region where it is most needed, using smaller unit blocks there, while using larger, more cost-effective unit blocks in the peripheral region. This maintains acceptable picture quality while reducing manufacturing cost.
Solution Approach 2:
The display is segmented into central and peripheral regions with different quality requirements. This segmentation enables the system to achieve high resolution in the important central area while using fewer, larger LEDs in the periphery, thus reducing manufacturing cost without significantly compromising overall picture quality.
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 reduces power consumption, increases resolution, and improves contrast ratio by optimizing the size and number of LEDs based on the perceived importance of different areas, resulting in enhanced picture quality.
Implementation Method 1
a backlight unit including a plurality of unit blocks that provide light to the display panel, each of the plurality of unit blocks including a plurality of LEDs
Data Source
AI summary
The object of the present disclosure aims to reduce power consumption and improve resolution and contrast ratio by implementing a smaller unit block for dimming in the area that the user perceives as the main area.