Direct Type Backlight Frame with Reflecting and Transmitting Portions
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Solution Overview
Problem
Conventional direct type backlight modules in narrow-frame televisions face limitations in brightness distribution due to opaque plastic frames, which restrict the light source from reaching the edges, resulting in suboptimal display effects and requiring larger frame sizes and higher precision in frame and back plate design.
Innovation Solution
A direct type backlight module incorporating a frame body with a light transmitting portion and a reflecting portion, where the illumination beam is transmitted through the light transmitting portion via reflection from the reflecting portion, allowing the frame to assist in light distribution and achieving a frameless visual effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If an opaque plastic frame is used to carry the diffusion plate and optical film layer, then the structural support and carrier function are achieved, but the light source cannot reach the end part of the plastic frame, resulting in poor brightness distribution and limited display effect
Solution Approach 1:
The frame body is divided into two functional portions: a light transmitting portion and a reflecting portion. The light transmitting portion allows light to pass through to illuminate the display panel edges, while the reflecting portion redirects light that would otherwise be blocked. This segmentation resolves the contradiction by enabling both structural support and effective light distribution.
Solution Approach 2:
Different portions of the frame body are assigned different optical properties: the light transmitting portion has high light transmission to enable edge illumination, while the reflecting portion has high reflectivity to redirect light. This local differentiation of material properties allows the frame to simultaneously provide structural support and optimize brightness distribution without requiring the entire frame to be opaque or transparent.
2Illumination intensity
If the width size of the plastic frame carrier surface is increased to improve light distribution, then the frame size becomes larger, but this increases the overall device size and reduces the narrow-frame effect
Solution Approach 1:
The reflecting portion acts as an intermediary element that redirects light from the light emitting element toward the light transmitting portion and display panel edges. This intermediary mechanism enables effective light distribution across the display area without requiring an increased frame width, as the reflecting portion efficiently directs light paths to reach areas that would otherwise require a larger frame structure.
3Ease of manufacture
If the plastic frame and buffer strips are made opaque for structural stability, then the manufacturing simplicity is maintained, but the light source cannot reach the end part of the frame, limiting the display effect
Solution Approach 1:
The frame body is segmented into light transmitting and reflecting portions, each optimized for its specific function. This segmentation allows the frame to maintain structural stability while enabling light to reach the display panel edges, resolving the contradiction between manufacturing simplicity and light distribution effectiveness.
Solution Approach 2:
The frame body employs local quality differentiation where specific portions have distinct optical properties. The light transmitting portion enables light passage for edge illumination, while the reflecting portion provides light redirection. This localized optimization allows the frame to achieve both structural integrity and effective light distribution without compromising manufacturing simplicity.
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 collaborative effect of the light transmitting and reflecting portions enables the frame to transmit illumination, enhancing brightness distribution and allowing for a frameless visual experience without the need for larger frame sizes or increased precision in frame and back plate design.
Implementation Method 1
The light transmitting portion has a carrier portion, wherein the illumination beam is configured to be transmitted into the light transmitting portion, transmitted to the carrier portion of the light transmitting portion by reflection of the reflecting portion
Data Source
AI summary
A direct type backlight module includes a back plate, a light emitting element, and a frame body. The light emitting element is disposed on the back plate and configured to provide an illumination beam. The frame body is disposed on the back plate to surround the light emitting element. The frame body includes a light transmitting portion and a reflecting portion. The light transmitting portion is located at an edge of a light emitting side of the direct type backlight module. The reflecting portion is located between the light transmitting portion and the back plate. The light transmitting portion has a carrier portion, wherein the illumination beam is configured to be transmitted into the light transmitting portion, transmitted to the carrier portion of the light transmitting portion by reflection of the reflecting portion, and then emitted. A display device including the direct type backlight module is also provided.