LED Package Lens Body for Cross Light Pattern Generation
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Solution Overview
Problem
Traditional automotive lamps using bulbs are inefficient and prone to failure, posing safety risks due to short lifespan and potential power wastage, whereas existing LED solutions often require additional shields to achieve desired light patterns, increasing cost and energy consumption.
Innovation Solution
An LED package structure with a cross-axis symmetrical optical design, comprising a substrate unit with lead frames, a light-emitting unit with LED chips, and a package unit including a light-transmitting body with a lens that projects a cross light pattern without the need for external shields, ensuring compliance with regulatory light form distributions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional bulbs are used in automotive lamps, then the light source can be easily obtained, but energy is wasted and the working life is short posing safety risks
Solution Approach 1:
The patent transitions from traditional bulb light sources to LED light sources, fundamentally changing the operational parameters including energy consumption, lifespan, and response time. LEDs consume less energy, provide longer working life, and eliminate idling time, directly resolving the contradiction between energy efficiency and reliability.
2Shape
If additional shields are added to regulate light form, then the desired light pattern can be achieved, but cost and energy consumption increase
Solution Approach 1:
The patent integrates the light-regulating function directly into the lens body structure of the LED package. The lens body is designed with specific optical surfaces that inherently shape the light output into the required cross pattern, eliminating the need for separate shields or additional light-regulating components, thus reducing energy loss and cost.
Solution Approach 2:
The lens body serves multiple functions simultaneously: it protects the LED chip, focuses and shapes the light output into the required cross pattern, and regulates the light distribution. This multi-functionality eliminates the need for separate light-regulating shields, reducing overall system complexity and energy consumption.
3Shape
If additional shields are added to regulate light form, then the desired light pattern can be achieved, but device complexity increases
Solution Approach 1:
The patent combines the light-shaping function with the lens body structure. The lens body includes specifically designed optical surfaces that directly produce the cross light pattern, merging what would traditionally require separate shields into a single integrated component, thereby reducing device complexity.
4Loss of energy
If LED chips are used to replace bulbs, then power saving and long working life are achieved, but additional components may be needed for light pattern regulation
Solution Approach 1:
The lens body is designed to perform multiple functions: protecting the LED chip, focusing light, and shaping the output into the required cross pattern. This multi-functional design eliminates the need for additional light-regulating shields, maintaining the power-saving benefits of LEDs while avoiding increased component complexity.
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 LED package structure effectively projects a cross light pattern with consistent luminous intensity, meeting regulatory requirements without additional shields, thus enhancing safety, reducing energy waste, and extending the lifespan of automotive lighting systems.
Implementation Method 1
The light-emitting unit including at least one LED chip disposed on one of the at least two lead frames and electrically connected between the at least two lead frames
Implementation Method 2
LED is a light emitting component of semiconductor process
Implementation Method 3
lens body integrated with the light-transmitting package body and disposed above the at least one LED chip, wherein the exposed portion of each lead frame is exposed from the light-transmitting package body
Data Source
AI summary
A LED package structure includes a substrate unit, a light-emitting unit and a package unit. The substrate unit includes two lead frames, and light-emitting unit including a LED chip electrically connected between the two lead frames. The package unit includes a light-transmitting package body enclosing the light-emitting unit and one part of each lead frame and a lens body integrated with the light-transmitting package body, and another part of each lead frame is exposed from the light-transmitting package body. Therefore, light beams generated by the LED chip pass through the lens body to project a cross light pattern on a plane, the cross light pattern has a concentrated cross light shape and a scattered light shape surrounding the concentrated cross light shape, the luminous intensity of the concentrated cross light shape is substantially the same and larger than the luminous intensity of the scattered light shape.