Backlight Approach Portion with Inclined Surface for Narrow Frame
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Solution Overview
Problem
Conventional display devices face challenges in minimizing the frame region around the display area, which is essential for both functional and design considerations, particularly when using a surface light source backlight, as existing designs do not optimize both the display panel and illumination device effectively to achieve a narrower frame.
Innovation Solution
The design incorporates a backlight with a main light guide portion and an approach portion, where light from the light source enters the approach portion, propagates, and then enters the main light guide portion, allowing for efficient illumination while minimizing the size of the backlight and thus the display device, by aligning the components to reduce the frame region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a surface light source backlight is used to illuminate the display panel, then the display area can be effectively lit, but the frame region cannot be sufficiently narrowed
Solution Approach 1:
The light guide plate transitions from a conventional planar structure to a three-dimensional configuration with an inclined surface. The inclined surface allows light to enter at an angle, creating a more efficient light path that reduces the horizontal space required for the backlight assembly, thereby narrowing the frame region while maintaining adequate illumination of the display area.
Solution Approach 2:
The patent modifies the geometric parameters of the light guide plate by introducing an inclined surface with a specific angle. This parameter change optimizes the light propagation path and reduces the distance light must travel horizontally, enabling a more compact backlight design that minimizes the frame region while preserving illumination effectiveness.
2Area of stationary object
If the backlight size is reduced to narrow the frame, then the frame region is narrowed, but the illumination effectiveness may be compromised
Solution Approach 1:
By introducing a vertical dimension through the inclined surface, the patent creates a more efficient three-dimensional light path. This allows the backlight assembly to be horizontally compact (narrowing the frame) while the inclined geometry ensures light still reaches the display area effectively, maintaining illumination intensity despite the reduced horizontal footprint.
Solution Approach 2:
The light guide plate utilizes a composite structure combining transparent material with a reflective layer on the inclined surface. This composite design enables the light to be redirected efficiently at the inclined interface, ensuring that even with a reduced backlight size, sufficient light reaches the display area to maintain effective illumination.
3Ease of manufacture
If conventional light guide plate design is used, then manufacturing is simple, but the frame region cannot be minimized
Solution Approach 1:
The inclined surface can be manufactured using conventional glass forming techniques such as slumping or pressing during the glass fabrication process. This approach adds the third-dimensional feature without requiring complex post-processing or assembly steps, maintaining manufacturing simplicity while achieving the space-saving geometric configuration needed to narrow the frame region.
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 enables a more compact display device with a narrower frame, optimizing space usage and allowing for more flexible design in the placement of components, thereby enhancing the display area to frame ratio and improving the overall design efficiency.
Implementation Method 1
a light guide plate having a light incident surface on which the light from the light source is incident and a light emitting surface opposite to the light incident surface, the light guide plate guiding the light from the light incident surface to the light emitting surface
Data Source
AI summary
An illumination device according to one embodiment includes a backlight and a display panel configured to selectively transmit light from the backlight. The backlight includes a light source, a main light guide portion formed in the shape of a flat plate and an approach portion. The main light guide portion includes a first surface facing the display panel, and a second surface opposite to the first surface. The approach portion includes a third surface facing the second surface, a fourth surface opposite to the third surface, a first end portion facing the light source, and a second end portion opposite to the first end portion, and connected to the main light guide portion, the fourth surface being inclined with respect to the third surface.