LED Light Source Module for Uniform Illumination
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Solution Overview
Problem
Existing light source modules experience light distribution imbalances and afterglow issues due to uneven current distribution among light emitting diodes on a circuit board, particularly when power is off, leading to visibility problems and reliability concerns.
Innovation Solution
A light source module design where second light emitting diodes are strategically placed between first light emitting diodes on a circuit board, connected in series, parallel, or series-parallel configurations, to disperse low current and afterglow light evenly across the board, reducing visibility and improving light balance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If light emitting diodes are densely arranged on a circuit board, then illumination coverage is improved, but light distribution uniformity deteriorates due to current imbalance
Solution Approach 1:
The patent segments the light emitting diodes into two distinct groups: first light emitting diodes connected to the power input terminal, and second light emitting diodes connected to the output ends of the first light emitting diodes. This segmentation allows different regions of the circuit board to be illuminated by different diode groups, balancing the current distribution and achieving uniform light distribution across the entire illumination area.
2Illumination intensity
If power is supplied to light emitting diodes, then light emission is achieved, but afterglow and low current leakage occur when power is off
Solution Approach 1:
The patent divides the power consumption and light emission functions between two segmented diode groups. The first light emitting diodes are activated during normal operation, while the second light emitting diodes are activated when power is reduced or off, emitting low-level light to dissipate residual energy and reduce afterglow effects. This segmentation effectively manages energy loss in different operational states.
3Illumination intensity
If second light emitting diodes are added between first light emitting diodes, then light balance is improved, but device complexity increases
Solution Approach 1:
The patent merges the functionality of multiple light emitting diodes into two integrated groups with distinct connection patterns. Rather than treating each diode independently, the first and second light emitting diodes work together as a coordinated system, where the second group compensates for the limitations of the first group, achieving balanced light distribution without requiring complex individual control circuits for each diode.
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 solution effectively disperses afterglow light and improves light balance, enhancing the reliability and uniformity of the light source module's illumination, while maintaining low current leakage and minimizing current loss.
Implementation Method 1
A light emitting diode (hereafter, referred to as an LED), which is a diode that emits light when a current is supplied
Implementation Method 2
electrons are excited to a higher energy level when a small number of carriers are injected into an active layer and the energy of the electrons is emitted as electromagnetic waves having the wavelength of light
Data Source
AI summary
An embodiment discloses a light source module. The disclosed light source module includes: a circuit board; and a plurality of light emitting diodes arranged on the circuit board, wherein the plurality of light emitting diodes include a plurality of first light emitting diodes connected to a power input terminal, and a plurality of second light emitting diodes connected to output ends of the plurality of first light emitting diodes, wherein the plurality of first light emitting diodes are spaced apart from each other, and at least two of the plurality of second light emitting diodes are disposed between the first light emitting diodes, respectively.