Light Guide Module Thick Thin Portion Design
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Solution Overview
Problem
Existing light guide modules face limitations in reducing size and number of light-emitting elements while maintaining good optical performance, such as brightness and uniformity, which hinders their miniaturization and power-saving capabilities.
Innovation Solution
A light guide module design featuring a circuit board with light-emitting elements, a light guide plate having a thick and thin portion, and reflective layers covering the plate's surfaces, allowing for efficient light distribution and exit, even with a reduced spacing between elements, thus achieving a thinner appearance and lower power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If the size of the light guide module is reduced and the number of light-emitting elements is reduced, then the appearance becomes thinner and power consumption is reduced, but the optical performance (brightness and uniformity) deteriorates
Solution Approach 1:
The light guide plate is divided into a thick portion and a thin portion connected together, creating different functional zones within the same structure. The thick portion handles light distribution while the thin portion optimizes light exit, allowing reduced overall size and fewer light-emitting elements while maintaining optical performance.
Solution Approach 2:
Different portions of the light guide plate are given different thicknesses to serve different functions. The thick portion (adjacent to light-emitting elements) provides light distribution and reflection, while the thin portion (over light-emitting elements) optimizes light extraction, creating local optimization without increasing overall size.
2Length of stationary object
If the size of the light guide module is reduced and the number of light-emitting elements is reduced, then the appearance becomes thinner, but the optical performance (brightness and uniformity) deteriorates
Solution Approach 1:
The light guide plate is segmented into thick and thin portions, allowing the module to achieve compact size while maintaining optical performance through functional differentiation within the reduced structure.
Solution Approach 2:
The invention transitions from a uniform single-dimension light guide plate to a multi-dimensional structure with varying thickness, utilizing vertical dimension variation to achieve both size reduction and optical performance maintenance.
3Quantity of substance
If the spacing between light-emitting elements is reduced, then the number of elements can be reduced, but the optical performance (brightness and uniformity) deteriorates
Solution Approach 1:
The thick portion of the light guide plate is positioned adjacent to the light-emitting elements to provide enhanced light distribution and reflection in the critical area near the elements, compensating for reduced spacing and maintaining optical performance with fewer elements.
Solution Approach 2:
The thick portion acts as an intermediary structure between the light-emitting elements and the thin portion, mediating light distribution and reflection to maintain uniformity even when elements are spaced closer together.
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 design achieves good optical performance with fewer light-emitting elements and a smaller module size, balancing miniaturization, low power consumption, and cost-effectiveness by optimizing light distribution and reflection.
Implementation Method 1
a first reflective layer covering a side surface of the thick portion away from the thin portion, and a second reflective layer covering an upper surface of the thick portion and an upper surface of the thin portion
Data Source
AI summary
A light guide module is provided, which includes a circuit board, one or more light-emitting elements, a light guide plate, a first reflective layer and a second reflective layer. The one or more light-emitting elements are disposed on the circuit board. The light guide plate is located on the circuit board, in which the light guide plate has a thick portion and a thin portion connected to the thick portion, and the thin portion is located over the one or more light-emitting elements, and a side surface of the thick portion adjacent to the thin portion is laterally adjacent to the one or more light-emitting elements. The first reflective layer covers a side surface of the thick portion away from the thin portion. The second reflective layer covers an upper surface of the thick portion and an upper surface of the thin portion.