Light-emitting Module with Dual-Surface Backlight for Partial Display Modes
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Solution Overview
Problem
Existing light-emitting touch panels can only display in full-bright or full-dark modes, lacking the ability to show two distinct light-emitting patterns simultaneously due to their single-layer backlight structure and design limitations.
Innovation Solution
A light-emitting module comprising a light-shielding sheet, a light guide plate, a light barrier, and two light-emitting elements, where the first light-emitting element emits light toward the bottom surface of the light guide plate and the second toward its side surface, allowing for partial display modes by using a single light guide plate to direct light from different surfaces and areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-layer backlight structure is used, then the device complexity is reduced, but the display capability is limited to full-bright or full-dark modes only
Solution Approach 1:
The light-shielding sheet is divided into multiple pattern areas (first pattern area, second pattern area, etc.) that can be independently controlled. Each pattern area corresponds to a specific light-emitting element, allowing selective illumination of different regions to create partial display modes while maintaining a single-layer backlight structure.
Solution Approach 2:
Different regions of the light guide plate are designed with different optical properties. The microstructure is specifically disposed corresponding to the second pattern area to guide light differently, enabling local light emission control. This allows the same single-layer structure to produce varied display patterns by controlling light emission from different locations and angles.
2Adaptability or versatility
If a double-layer backlight structure is used to display two light-emitting patterns, then the display capability is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
A single light guide plate performs multiple functions that would traditionally require two separate layers. It receives light from both first light-emitting elements (from below) and second light-emitting elements (from the side), and guides this light to create different display patterns. This multi-functional design eliminates the need for a double-layer structure while maintaining full display capability.
Solution Approach 2:
The patent introduces a new dimension of light emission by placing second light-emitting elements at the side surface of the light guide plate in addition to the traditional bottom surface elements. This spatial arrangement allows a single layer to achieve what previously required two layers, as light from different directions creates different display patterns.
3Adaptability or versatility
If two light-emitting elements are added to create partial display modes, then the display versatility is improved, but the device complexity increases
Solution Approach 1:
The patent combines first light-emitting elements and second light-emitting elements into a single integrated system sharing one light guide plate and one light-shielding sheet. The light barrier integrates multiple holes to accommodate both types of elements. This merging approach allows partial display modes to be achieved without duplicating entire backlight layers, reducing overall device complexity compared to traditional multi-layer solutions.
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
Enables independent use of light from two light-emitting elements to present partial display modes beyond full-bright and full-dark states, enhancing display flexibility without the need for a double-layer backlight structure.
Implementation Method 1
a light guide plate, a light barrier, a circuit board, and a first light-emitting element, and a second light-emitting element. The light-shielding sheet includes a first pattern area and a second pattern area. The light guide plate is disposed under the light-shielding sheet and has a microstructure disposed corresponding to the second pattern area
Implementation Method 2
The light guide plate is disposed under the light-shielding sheet and has a microstructure disposed corresponding to the second pattern area
Data Source
AI summary
A light-emitting module includes a light-shielding sheet, a light guide plate, a light barrier, a circuit board, and first and second light-emitting elements. The light-shielding sheet includes a first pattern area and a second pattern area. The light guide plate is disposed under the light-shielding sheet and has a microstructure disposed corresponding to the second pattern area. The light barrier is disposed under the light guide plate and has first and second holes. The circuit board is disposed under the light barrier. The first light-emitting element is disposed on the circuit board, enters the first hole, and is configured to emit light toward a bottom surface of the light guide plate. The second light-emitting element is disposed on the circuit board, passes through the second hole, and is configured to emit light toward a side surface of the light guide plate.