Multi-Substrate Lamp Current Control for Thermal Protection
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Solution Overview
Problem
Existing vehicle lamps with multiple light-emitting elements require large currents, leading to significant heat generation and potential thermal destruction of electronic components.
Innovation Solution
A lamp design with a power supply circuit, light source, temperature detection circuits, and control unit that adjust drive currents based on temperature readings to prevent heat generation and component destruction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a large number of light-emitting elements are provided to improve light distribution control, then light distribution precision is improved, but heat generation increases and electronic components may be thermally destroyed
Solution Approach 1:
The patent divides the light source system into multiple independent light-emitting elements that can be individually controlled. Each element can be switched on or off separately, allowing precise light distribution patterns while reducing the total number of simultaneously active elements, thereby managing heat generation.
Solution Approach 2:
The system dynamically adjusts which light-emitting elements are activated based on driving conditions and temperature feedback. The control unit selectively turns on specific elements rather than all elements simultaneously, optimizing light distribution while preventing excessive heat accumulation.
2Illumination intensity
If a large current is supplied to drive multiple light-emitting elements, then light output is improved, but heat generation becomes large and electronic components may be thermally destroyed
Solution Approach 1:
The patent applies partial action by activating only the necessary subset of light-emitting elements required for the current driving condition rather than all elements. This provides sufficient light output for the specific situation while avoiding the excessive current and heat generation that would result from driving all elements simultaneously.
Solution Approach 2:
The system periodically reassesses driving conditions and temperature levels, dynamically adjusting which elements are active. This periodic control allows the system to maintain adequate light output when needed while preventing sustained high current flow that would cause thermal damage.
3Adaptability or versatility
If electronic components are provided on multiple substrates to enable complex control functions, then control capability is improved, but heat generation increases on each substrate
Solution Approach 1:
The control system is segmented across multiple substrates, with each substrate containing specific electronic components for particular control functions. This segmentation allows distributed control capability while enabling thermal management by isolating heat-generating components on separate substrates rather than concentrating them in one location.
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
Prevents heat generation and thermal destruction of electronic components while maintaining light distribution patterns, reducing power consumption without affecting performance.
Implementation Method 1
a power supply circuit provided on a first substrate and configured to generate a predetermined voltage based on a power supply voltage
Implementation Method 2
a light source that is provided on a second substrate, includes a plurality of light-emitting elements
Implementation Method 3
light-emitting elements and an adjustment unit configured to adjust a drive current flowing through each of the plurality of light-emitting elements
Implementation Method 4
a first temperature detection circuit provided on the first substrate and configured to detect a temperature, and a second temperature detection circuit provided on the second substrate and configured to detect a temperature
Implementation Method 5
The control unit is configured to control the adjustment unit based on a detection result having a higher temperature of detection results of the first and second temperature detection circuits and a signal indicating a turn-on condition of the plurality of light-emitting elements
Data Source
AI summary
A lamp includes a power supply circuit, a light source, a control unit, a first temperature detection circuit, and a second temperature detection circuit. The power supply circuit is provided on a first substrate and configured to generate a predetermined voltage based on a power supply voltage. The light source, which is provided on a second substrate, includes a plurality of light-emitting elements and an adjustment unit configured to adjust a drive current flowing through each of the plurality of light-emitting elements, and uses the predetermined voltage as a power supply. The control unit is provided on a third substrate and configured to control the adjustment unit. The first temperature detection circuit is provided on the first substrate and configured to detect a temperature. The second temperature detection circuit is provided on the second substrate and configured to detect a temperature. The control unit is configured to control the adjustment unit based on a detection result having a higher temperature of detection results of the first and second temperature detection circuits and a signal indicating a turn-on condition of the plurality of light-emitting elements.