Shutter Panel Local Dimming Light Diffusion Control
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Solution Overview
Problem
Display apparatuses face challenges in maintaining image quality due to light diffusion from dark areas, which reduces light efficiency and overall image representation.
Innovation Solution
A display apparatus incorporating a liquid crystal panel, a shutter panel with a shutter layer and quantum rod layer, and polarizing layers to selectively control light transmission and polarization, allowing for improved local dimming and light efficiency by blocking or altering light in specific areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a backlight is used to illuminate the display panel, then the display can show images, but light diffuses to areas that should be dark, deteriorating image quality
Solution Approach 1:
The patent divides the backlight system into multiple independently controllable backlight units corresponding to different regions of the display panel. This segmentation allows selective illumination of specific areas, preventing light from diffusing into regions that should remain dark, thereby resolving the contradiction between maintaining overall illumination and preventing light diffusion.
Solution Approach 2:
The patent introduces a shutter panel with liquid crystal shutters that can dynamically adjust their transmission state (open/closed) based on image requirements. This dynamic control allows the system to adapt light transmission in real-time, enabling dark areas to block light effectively while maintaining brightness in illuminated areas, thus resolving the light diffusion problem.
2Object-affected harmful factors
If local dimming is implemented to improve image quality, then dark areas can be better controlled, but the device structure becomes more complex
Solution Approach 1:
The patent combines the shutter panel with the liquid crystal display panel structure, integrating the local dimming function into the existing display architecture. By merging the shutter layer with the liquid crystal panel and using the same liquid crystal material for both functions, the patent reduces structural complexity while achieving effective local dimming control.
Solution Approach 2:
The liquid crystal layer serves multiple functions: it acts as both the display medium for image formation and the shutter mechanism for local dimming control. This multi-functionality eliminates the need for separate shutter components, simplifying the overall structure while maintaining image quality through effective light control in dark areas.
3Loss of energy
If a shutter panel is added to control light selectively, then light efficiency improves, but the device structure becomes more complex
Solution Approach 1:
The patent nests the shutter panel structure within the existing display panel architecture. The shutter layer is integrated between the backlight units and the liquid crystal display layer, utilizing the same structural framework and materials. This nesting approach allows the shutter functionality to be incorporated without adding significant structural complexity, while achieving improved light efficiency through selective blocking.
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
Enhances image quality and light efficiency by selectively managing light transmission and polarization, reducing light diffusion from dark areas and improving color reproduction.
Implementation Method 1
a quantum rod layer disposed on a second surface of the shutter layer that is opposite to the first surface, of the shutter layer, the quantum rod layer being configured to convert a wavelength of light incident on the shutter panel
Implementation Method 2
the shutter layer includes a selected area configured to change a polarizing axis of light being transmitted therethrough
Implementation Method 3
the shutter layer may include a plurality of liquid crystal molecules configured to change arrangement based on a presence of an electric field to change a polarizing axis of incident light
Implementation Method 4
a shutter polarizing layer disposed on a first surface of the shutter layer, the shutter polarizing layer being configured to transmit light having the polarizing axis changed by the shutter layer
Data Source
AI summary
Provided is a display apparatus including a liquid crystal panel and a shutter panel, wherein the shutter panel includes a shutter layer configured to change a polarizing axis of light transmitted through a selected area, a shutter polarizing layer disposed on a front surface of the shutter layer, and configured to transmit light having the polarizing axis changed by the shutter layer, and a quantum rod layer disposed on a rear surface of the shutter layer, and configured to convert a wavelength of light that is incident to the shutter panel, and to transmit light having a polarizing axis of a predetermined direction to the shutter layer. Therefore, the display apparatus may implement a local dimming structure and improve the optical efficiency.