Microstructured Light Guide Plate for Curved Display Brightness
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Solution Overview
Problem
Existing display devices face issues with decreased brightness and uneven brightness due to the use of privacy filters or collimated backlight modules, which can cause optical interference, particularly in curved displays, affecting customer experience.
Innovation Solution
A display device design incorporating a light guide plate with microstructures that guide light efficiently, including a first and second periphery light guide region with inclined surfaces, and a middle light guide region, along with a second light guide plate with diffuser dots, to enhance light distribution and adjust viewing angles by controlling the intensity of light from multiple light emitting units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If privacy filters or collimated backlight modules are used to limit viewing angles, then anti-peeping effect is improved, but brightness and uniformity of the display device deteriorate
Solution Approach 1:
The light guide plate is divided into multiple regions with different microstructure types: first microstructures in the first periphery region, second microstructures in the second periphery region, and third microstructures in the middle region. Each region's microstructures are optimized to guide light from different positions of the light emitting unit, achieving uniform brightness without requiring privacy filters.
Solution Approach 2:
Different regions of the light guide plate are equipped with different microstructure designs tailored to their specific functions. The first microstructures have first light guide inclined surfaces optimized for light from the first position, while the second microstructures have second light guide inclined surfaces optimized for light from the second position, creating locally optimized light guidance throughout the plate.
2Object-affected harmful factors
If privacy filters are used in curved display devices, then viewing angle control is improved, but optical interference occurs affecting customer experience
Solution Approach 1:
The invention extracts and eliminates the privacy filter component from the display device, replacing it with a light guide plate that has integrated microstructures for viewing angle control. This removes the source of optical interference while maintaining the essential function of limiting viewing angles through the optical properties of the microstructured light guide plate.
3Illumination intensity
If light guide plate with microstructures is used to guide light efficiently, then peripheral brightness is improved, but device complexity increases
Solution Approach 1:
The invention merges multiple functions into a single light guide plate component. The plate simultaneously serves as a light distribution element, a viewing angle control element, and a brightness uniformity element through its integrated microstructures. This eliminates the need for separate privacy filters and collimating elements, reducing overall device complexity while improving peripheral 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 solution effectively increases peripheral brightness without compromising anti-peeping effects, reduces light loss, and allows for adjustable viewing angles, improving image quality and user experience without the need for privacy filters, especially in curved displays.
Implementation Method 1
The first light guide inclined surfaces and the second light guide inclined surfaces guide the light provided by the light emitting unit to the display panel through the light emitting surface
Implementation Method 2
The reflection surface includes a first periphery light guide region, a second periphery light guide region, and a middle light guide region
Implementation Method 3
The second light guide plate includes diffuser dots. The second light is scattered by the diffuser dots of the second light guide plate
Data Source
AI summary
The display device includes a display panel and a backlight module on the display panel. The backlight module includes light guide plate having a light incident surface, a light emitting surface facing the display panel and a reflection surface. Two sides of the light incident surface connect the light emitting surface and the reflection surface respectively. The reflection surface includes a first periphery light guide region, a second periphery light guide region, and a middle light guide region between the first periphery light guide region and the second periphery light guide region. The first periphery light guide region includes first microstructures. The second periphery light guide region includes second microstructures. The first microstructures have first light guide inclined surfaces inclined towards the second periphery light guide region. The second microstructures have second light guide inclined surfaces inclined towards the first periphery light guide region.