Backlight Unit Light Guide Plate 3D Mode Switching
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Solution Overview
Problem
Current 3D and 2D image display technologies require cumbersome methods to switch between display modes, such as using parallax barriers or lenticular methods, which are inefficient and increase production costs and device thickness.
Innovation Solution
A backlight unit with a light guide plate featuring distinct light emission patterns on its upper and lower surfaces, utilizing separate light sources for 3D and 2D image display modes, allowing for directivity control and efficient switching between modes without additional devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If parallax barrier or lenticular method is used for 3D display, then 3D image display is achieved, but device complexity and thickness increase
Solution Approach 1:
The patent extracts the 3D display function from separate components (parallax barrier or lenticular lens) and integrates it into the backlight unit's light guide plate. By embedding directional light emission patterns directly in the light guide plate, the invention eliminates the need for additional 3D display components, thereby reducing device complexity while maintaining 3D image display capability
Solution Approach 2:
The light guide plate is designed to serve multiple functions: it guides light for both 2D and 3D display modes, and incorporates both directional patterns (for 3D) and uniform emission areas (for 2D). This multi-functionality allows a single component to replace what would traditionally require separate mechanisms for mode switching, reducing overall device complexity
2Adaptability or versatility
If parallax barrier or lenticular method is used for 3D display, then 3D image display is achieved, but production cost increases
Solution Approach 1:
The patent merges the light guide function with the 3D display function into a single integrated component. The light guide plate simultaneously performs light guidance and provides directional light emission patterns, eliminating the need to manufacture and assemble separate parallax barriers or lenticular lenses, thereby reducing production costs
Solution Approach 2:
By extracting the 3D display function from separate components and embedding it directly in the light guide plate manufacturing process, the invention simplifies the production workflow and reduces the number of parts that need to be manufactured and assembled, leading to lower production costs
3Adaptability or versatility
If barrier or lens array is added for 3D display, then 3D image display is achieved, but device thickness increases
Solution Approach 1:
The patent applies the nesting principle by embedding the directional light emission patterns directly within the light guide plate structure. The patterns are formed as integral parts of the light guide plate itself, with protrusions and recesses that are nested within the plate's body, eliminating the need for additional external components and thereby reducing device thickness
Solution Approach 2:
By extracting the 3D display function from separate external components and integrating it into the light guide plate, the invention removes the need for additional layers of barriers or lenses that would increase thickness, while still achieving 3D image display capability
4Adaptability or versatility
If switching between 3D and 2D display modes is implemented, then display versatility is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamics by making the light guide plate's light emission characteristics adjustable between two states: directional pattern emission for 3D mode and uniform emission for 2D mode. This dynamic switching capability is achieved through controlled activation of different light source regions, allowing the display to adapt between modes without complex mechanical reconfiguration
Solution Approach 2:
The light guide plate is designed as a universal component that handles both 2D and 3D display functions. By incorporating both directional patterns and uniform emission areas within the same plate, the system can switch between display modes by simply activating different regions of the light guide plate, eliminating the need for separate mechanisms for each mode
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
Enables seamless switching between 3D and 2D image display on a single device, reducing production costs and device thickness by using the light guide plate's patterns to control light emission, thereby enhancing image quality and viewing angles.
Implementation Method 1
a light guide plate configured to include, on an upper surface, a first pattern for emitting the light incident from the first light source toward the display panel, and to include, on a lower surface, a second pattern for emitting the light incident from the second light source toward the display panel
Data Source
AI summary
A backlight unit includes a first light source, a second light source, and a light guide plate having, on an upper surface, and, on a lower surface, a second pattern. The first pattern extracts, from the light guide plate, light from the first and second light sources, and emits the light towards a display panel. The second pattern extracts, from the light guide plate, light from the second light source, and emits the light toward the display panel. A display panel may include the backlight unit.