LED Lamp Drive Circuit Peripheral Arrangement for Brightness and Heat
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Solution Overview
Problem
LED light source lamps with built-in drive circuits face challenges in achieving even brightness on the light-emitting surface without compromising light extraction efficiency, especially due to the limited distance between the LED and the diffusion film, and require improved heat dissipation performance.
Innovation Solution
The LED light source lamp design includes an LED installation plate, an LED module, and a light diffusion member, with the drive circuit positioned in an outer peripheral space to avoid blocking the optical axis, and a separation member to shield thermal radiation, while a reflection diffusion member enhances light distribution and a thermally conductive LED installation plate improves heat dissipation by closely contacting the lamp holder.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a thicker diffusion film or higher particle density is employed to reduce brightness unevenness, then the brightness uniformity is improved, but the light extraction efficiency deteriorates resulting in lower brightness
Solution Approach 1:
The patent introduces a new spatial dimension by positioning the drive circuit in the peripheral region rather than occupying the central space between LED and diffusion film. This allows the diffusion film to be placed at an optimal distance from the LED while accommodating the drive circuit in the peripheral area, thus achieving both good brightness uniformity and high light extraction efficiency simultaneously
2Length of moving object
If the distance between LED and diffusion film is reduced to make the lamp thinner, then the lamp thickness is reduced, but the brightness uniformity deteriorates
Solution Approach 1:
The patent resolves this contradiction by utilizing the peripheral dimension of the lamp structure. The drive circuit is arranged in the peripheral region between the LED module and diffusion film, which allows maintaining a sufficient distance between LED and diffusion film for good brightness uniformity while keeping the overall lamp thickness reduced through efficient space utilization in the peripheral area
3Device complexity
If the drive circuit is arranged close to the LED for compact design, then the device complexity is reduced, but the heat dissipation performance deteriorates
Solution Approach 1:
The patent positions the drive circuit in the peripheral region, separated from the LED module by a certain distance. This spatial arrangement in the peripheral dimension allows heat generated by the drive circuit to be dissipated more effectively through the lamp holder while maintaining compact overall design, thus achieving both structural compactness and good heat dissipation performance
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 ensures even brightness on the light-emitting surface without deteriorating light extraction efficiency, enhances thermal protection, reduces electromagnetic noise, and improves heat dissipation, making the LED light source lamp suitable for various lighting applications.
Implementation Method 1
The light diffusion member is arranged so as to block an optical axis of light emitted by each of the at least one LED of the LED module
Implementation Method 2
an LED module; and a light diffusion member. The LED installation plate is arranged, in a main space in the housing, on an attachment side to the lamp holder. The LED module is installed on a surface, of the LED installation plate, opposite to the lamp holder, and includes at least one LED element that emits light by being driven by the drive circuit
Implementation Method 3
improves heat dissipation through a thermally conductive lamp holder
Data Source
AI summary
An LED light source lamp includes a housing configured to be attached to a lamp holder; an LED module provided in the housing; a drive circuit provided in the housing and configured to drive the LED module to cause the LED module to emit light; an LED installation plate on which the LED module is installed; a cover arranged to block an optical axis of the LED module and configured to transmit light emitted from the LED module; and a separation member configured to separate the drive circuit from a space between the LED module and the cover in the housing. The LED installation plate has a rear surface, opposite the surface on which the LED module is installed. The rear surface is configured to closely contact the lamp holder, and is a part of the housing.