Display Device Bezel Light Guide Plate Segmentation for Narrow Non-Display Region
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Solution Overview
Problem
Display devices with multiple regions face challenges in minimizing the intermediate non-display region while preventing light leakage when sharing a backlight module, especially when operating in unilateral display mode.
Innovation Solution
The design incorporates a bezel with separate first and second light guide plates, reflection sheets, and fixing members to create a compact intermediate non-display region, preventing light leakage by positioning the reflection sheets and fixing members to control light emission and absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If two independent backlight modules are used for the display region that is normally turned on and the display region that is not normally turned on, then light leakage can be prevented, but the intermediate non-display region cannot be narrowed down
Solution Approach 1:
The backlight module is segmented into a first backlight unit for the first display region and a second backlight unit for the second display region. Each backlight unit includes its own light guide plate (first LGP and second LGP) with separate light incident surfaces, allowing independent light control while sharing a single backlight module structure. This segmentation enables the intermediate non-display region to be narrowed while preventing light leakage between regions.
2Length of moving object
If the same backlight module is shared by both display regions, then the intermediate non-display region can be narrowed, but light leakage occurs in the display region that is not normally turned on when operating in unilateral display mode
Solution Approach 1:
Different regions of the light guide plate are assigned different functions: the first light incident surface receives light for the first display region, while the second light incident surface receives light for the second display region. The light guide plate has different optical properties in different areas, allowing it to direct light locally to the appropriate display region while preventing light from reaching the non-active region, thus eliminating light leakage.
Solution Approach 2:
A light shielding structure is introduced as an intermediary element between the two display regions. This structure includes a light shielding plate and a light shielding layer that selectively block light from reaching the second display region when only the first display region is active, thereby preventing light leakage while maintaining the shared backlight module configuration.
3Length of moving object
If the intermediate non-display region is narrowed to a certain value, then appearance is improved, but it becomes impossible to provide separate planar light sources for each display region
Solution Approach 1:
The single light guide plate is designed to perform multiple functions: it guides light from the first light source to the first display region, guides light from the second light source to the second display region, and simultaneously prevents light leakage between regions through its differentiated optical structure. This multi-functionality allows the intermediate non-display region to be narrowed while maintaining separate light control capabilities.
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 allows for a narrow intermediate non-display region and prevents light leakage in the unused display area, ensuring effective operation in unilateral display modes without compromising appearance or functionality.
Implementation Method 1
a reflection sheet, the reflection sheet has a bent portion, the bent portion of the reflection sheet is disposed beside the first side surface of the light guide plate
Data Source
AI summary
A display device includes a bezel, first and second light guide plates (LGP), first and second light emitting element, first and second reflection sheets, a first fixing member, and at least one display panel. Each of the first and second LGPs has a bottom surface, a light exit surface, a light incident surface, and a first side surface. The first and second reflection sheets are located between the bezel and the first LGP and between the bezel and the second LGP, respectively. Bent portions of the first and second reflection sheets are disposed beside the first side surface of the first LGP and the first side surface of the second LGP, respectively and located between the first side surface of the first LGP and the first side surface of the second LGP. The first fixing member is sandwiched between the bent portions of the first and second reflection sheets.