Segmented Backlight PCBs for Large Display Structural Stability
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Solution Overview
Problem
The challenge is to support and power large-sized display panels effectively, as existing display apparatuses face difficulties in accommodating and driving large display panels with efficient backlighting and structural reinforcement.
Innovation Solution
The solution involves a display apparatus with a backlight comprising multiple printed circuit boards and light-emitting diodes, supported by a panel-shaped member with a honeycomb structure, along with a middle mold, bottom chassis, and supporting member, which divides the display panel into domains for driving, and includes various boards for power and signal processing to manage the increased size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a single large backlight is used for large display panels, then the display area is increased, but the backlight becomes heavy and difficult to support
Solution Approach 1:
The backlight is divided into multiple smaller backlights arranged in an array, with each backlight corresponding to a specific domain of the display panel. This segmentation reduces the weight of individual backlight components while maintaining coverage of the entire large display area through coordinated operation of multiple units.
2Area of stationary object
If a single large backlight is used, then the display area is increased, but the backlight structure becomes complex and difficult to control
Solution Approach 1:
The backlight system is segmented into multiple independent backlight units, each corresponding to a domain controlled by a separate domain control circuit. This allows independent control of each segment, simplifying the overall control architecture compared to a single large backlight requiring complex centralized control.
Solution Approach 2:
The backlight system enables dynamic control of individual domains through domain control circuits that can independently adjust parameters such as pulse width modulation for each backlight unit, allowing flexible adaptation to different display requirements without redesigning the entire system.
3Area of stationary object
If the display panel size is increased, then the display capacity is improved, but structural bending and stability issues occur
Solution Approach 1:
The display panel is divided into multiple domains, with each domain supported by corresponding structural elements and driven by separate control circuits. This segmentation allows the large panel to be managed as multiple smaller, more stable units, reducing overall structural bending while maintaining large display capacity.
4Area of stationary object
If multiple backlights are used to cover large area, then the display area is increased, but the arrangement becomes uneven and inefficient
Solution Approach 1:
Each backlight unit is positioned to correspond to a specific domain of the display panel, creating a localized mapping between backlight elements and display regions. This arrangement optimizes light distribution efficiency for each local area while maintaining overall uniformity across the entire large display surface.
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 configuration allows for stable and efficient lighting of large display panels, preventing structural bending and enhancing heat dissipation, while enabling effective control of the display panel's domains, thus supporting larger display sizes without the need for oversized backlights.
Implementation Method 1
a plurality of light emitting diodes mounted on the plurality of printed circuit boards
Implementation Method 2
The panel shaped member may have a honeycomb structure formed between a pair of aluminum panels
Data Source
AI summary
A display apparatus having a display panel and a backlight to radiate light to the display panel is provided, The backlight includes a plurality of printed circuit boards disposed in an even manner and a plurality of light emitting diodes mounted on the plurality of printed circuit boards. Thus a backlight proper for a large display panel may be provided.