Microstructure Layer for Wide Viewing Angle Display
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Solution Overview
Problem
Display devices face challenges in expanding viewing angles while maintaining front view brightness, as functional layers that enhance viewing angles often compromise on brightness or vice versa, and there is a need for a solution that can improve viewing angles while preserving brightness for specific application scenarios.
Innovation Solution
A display device with a microstructure layer positioned between the backlight module and the display panel, featuring a base layer with microstructure groups that include central and trapezoidal sections, which diffuse light to enhance viewing angles while maintaining brightness, comprising a central trapezoidal section and symmetrical trapezoidal sections that taper towards the backlight module, optimizing light diffusion and energy distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If functional layers with diffusing function are added to expand viewing angle, then display viewing angle is improved, but front view brightness is reduced
Solution Approach 1:
The microstructure layer is divided into multiple microstructure groups arranged in array, with each group containing multiple microstructures (prisms, lenses, or reflective elements). This segmentation allows different regions to control light in specific directions, achieving wide viewing angle while maintaining front view brightness through coordinated light distribution from multiple segmented elements
Solution Approach 2:
Different microstructure types are strategically positioned within the microstructure groups: prismatic structures at certain positions for specific angle diffusion, lens structures at other positions for light convergence, and reflective structures for light redirection. This local differentiation of optical properties enables simultaneous optimization of front view brightness and viewing angle expansion
2Adaptability or versatility
If diffusing functional layer is used to realize wide viewing angle, then viewing angle is expanded, but it is difficult to maintain front view brightness at the same time
Solution Approach 1:
The microstructure layer acts as an intermediary optical element positioned between the backlight module and display panel. It mediates the light from the backlight by selectively diffusing, converging, and redirecting light rays to different angular regions, thereby achieving wide viewing angle coverage while preserving sufficient light intensity in the front view direction through its intermediary light control function
Solution Approach 2:
The optical parameters of the microstructure layer are precisely controlled, including the refractive indices of different microstructure materials, the geometric angles of prismatic and lens structures, and the spacing between microstructure groups. By optimizing these parameters, the layer achieves optimal balance between light diffusion for wide viewing angle and light concentration for maintaining front view brightness
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
The microstructure layer effectively increases the display viewing angle while minimizing front view brightness reduction, achieving a wide-angle, high-brightness display effect, suitable for various applications including vehicle central control panels.
Implementation Method 1
the microstructure layer has a base layer and multiple microstructure groups arranged in the base layer... each microstructure group comprises a central structure, a first structure and a second structure... Based on the height of the central trapezoidal section, the legs of the first trapezoidal section and the second trapezoidal section facing away from the central structure are more inclined than the legs toward the central structure
Data Source
AI summary
The present invention provides a display device including a display panel, a backlight module, and a microstructure layer. The microstructure layer has a base layer and a plurality of microstructure groups. Each microstructure group includes: a central structure with a central trapezoidal section, a first structure with a first trapezoidal section, and a second structure with a second trapezoidal section arranged on a second side of the central structure. Based on the height of the central trapezoidal section, the legs of the first trapezoidal section and the second trapezoidal section facing away from the central structure are more inclined than the legs of the first trapezoidal section and the second trapezoidal section toward the central structure. The longer baselines of the central trapezoidal section, the first trapezoidal section, and the second trapezoidal section are all closer to the backlight module than the shorter upperlines.