Zigzag Backlight Substrates for Curved Displays
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Solution Overview
Problem
Conventional display apparatuses with backlight units often experience dark areas due to light blocking between adjacent light source units, particularly in curved display panels where light source unit spacing is compromised.
Innovation Solution
The design incorporates light source substrates with zigzag shapes, where first and second extending portions create diagonal directions, and light source units are positioned at bending portions, increasing the distance between adjacent units to minimize light blocking, thereby preventing dark areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If light source units are arranged closely together to reduce the overall size of the backlight unit, then the device compactness is improved, but light blocking occurs between adjacent light source units causing dark areas
Solution Approach 1:
The light source substrate is designed with a zigzag shape instead of a straight line, creating diagonal extending portions that increase the effective distance between adjacent light source units. This curved configuration allows light to propagate along angled paths, reducing direct blocking between units while maintaining compact overall dimensions.
Solution Approach 2:
The patent introduces diagonal directions (first and second diagonal directions) as additional spatial dimensions for light propagation. By arranging light source units to emit light in multiple diagonal directions rather than only perpendicular to the substrate, the design creates three-dimensional light paths that avoid blocking from adjacent units.
2Illumination intensity
If light source units are positioned at bending portions of zigzag substrates to increase spacing, then dark areas are prevented, but the structural complexity increases
Solution Approach 1:
The zigzag substrate is segmented into multiple extending portions (first and second extending portions) connected at bending portions. Each segment serves a specific function: first extending portions extend in one diagonal direction, second extending portions extend in another diagonal direction, and bending portions position light source units at optimal locations. This segmentation makes the complex shape manufacturable and functional.
Solution Approach 2:
Different portions of the zigzag substrate have different local functions: first extending portions provide light propagation in one direction, second extending portions provide light propagation in another direction, and bending portions serve as positioning points for light source units. This local differentiation optimizes light distribution while managing structural complexity.
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 effectively reduces light blocking between light source units, ensuring uniform light distribution and preventing dark areas, enhancing the display quality of curved display apparatuses.
Implementation Method 1
The light source units are a side surface light-emitting type diode to emit the light through a side surface of the light source units
Implementation Method 2
The plurality of light source substrates have a zigzag shape, and the plurality of light source units are disposed at predetermined areas of bending portions of the zigzag shape
Data Source
AI summary
A display apparatus includes a display panel displaying an image using a light and a backlight unit generating the light, providing the light to the display panel and including a plurality of light source units generating the light and a plurality of light source substrates arranged in a first direction and disposed on the plurality of light source substrates where the plurality of light source substrates have a zigzag shape, and the plurality of light source units are disposed at predetermined areas of bending portions of the zigzag shape.