LEDs - Circuit Board Indicators, Arrays, Light Bars, Bar Graphs

Image	Part Number	Description / PDF	Quantity	Rfq
	ELM14255RD Califia Lighting (Bivar)	LED ASSY VERT 5MM RED 655NM	0
	H204CGDL Califia Lighting (Bivar)	LED ASSY RA 3MM BI-LVL GRN DIFF	0
	H220CYBWD-LP Califia Lighting (Bivar)	LED ASSY RA 3MM	0
	H310CRGGDL Califia Lighting (Bivar)	LED ASSY RA 3MM 3X1 R/G/G DIFF	0
	H275CGYD Califia Lighting (Bivar)	LED ASSY RA 5MM 2LVL GN/YW DIFF	0
	ELM17003BC Califia Lighting (Bivar)	LED ASSY VERT	0
	FLPV12.0-SY Califia Lighting (Bivar)	LIGHT PIPE 3MM RND LENS	0
	H301CRGD-100 Califia Lighting (Bivar)	LED ASSY RA 3MM 2LVL RD/GN DIFF	0
	H180CBC-LP-Y/G Califia Lighting (Bivar)	LED ASSY RA 3MM YLGRN WHT DIFF	0
	ELM21603HD Califia Lighting (Bivar)	LED ASSY VERT	0
	H401CBWD Califia Lighting (Bivar)	LED ASSY RA 3MM 4X1 BLUE DIFF	0
	ELM30705BC-3 Califia Lighting (Bivar)	LED ASSY 0.070" 5MM R/G WHT DIFF	0
	H131CYD-140 Califia Lighting (Bivar)	LED ASSY RA 3MM YELLOW DIFF	0
	H485CHGGGDL Califia Lighting (Bivar)	LED ASSY RA 1.8MM 4X1 R/G/G/G DF	0
	H175CGD Califia Lighting (Bivar)	LED ASSY RA 5MM GRN 565NM	0
	SLM1505GD Califia Lighting (Bivar)	LED ASSY VERT 5MM GRN 565NM	0
	LTM2605YT Califia Lighting (Bivar)	LED ASSY VERT 0.26" 5MM YLW TINT	0
	FLP5V12.0-UR Califia Lighting (Bivar)	LIGHT PIPE 7MM RND LENS	0
	H201CGYDL Califia Lighting (Bivar)	LED BI-LEVEL 3MM YELLOW	0
	FLPV9.0-SY Califia Lighting (Bivar)	LIGHT PIPE 3MM RND LENS	0

LEDs - Circuit Board Indicators, Arrays, Light Bars, Bar Graphs

1. Overview

Light Emitting Diodes (LEDs) are semiconductor devices that convert electrical energy into light through electroluminescence. This product category includes indicators, arrays, light bars, and bar graphs designed for circuit board integration. LEDs serve critical roles in modern electronics for status indication, data visualization, and illumination. Their advantages include low power consumption, long lifespan, and compact form factors.

2. Main Types and Functional Classification

Type	Functional Features	Application Examples
Indicators	Single/dual-color point-source lighting for status indication	Power switches, network routers, medical device panels
Arrays	Matrix configurations for alphanumeric/symbol display	Seven-segment displays, dot matrix modules
Light Bars	Linear arrangements for directional lighting/brightness zones	Audio level meters, industrial control panels
Bar Graphs	Segmented columns for quantitative visual representation	Battery level indicators, sensor data visualization

3. Structure and Components

Typical LED components include:

Die: Gallium Nitride (GaN) or Indium Gallium Aluminum Phosphide (InGaAlP) semiconductor chips
Substrate: FR4 or metal-core PCB for thermal management
Encapsulation: Epoxy resin with diffused/optical lens structures
Driver Circuitry: Current-limiting resistors or PWM control ICs

4. Key Technical Specifications

Parameter	Description	Importance
Luminous Intensity	0.1-100 cd/m range	Determines visibility in various lighting conditions
Wavelength	400-700 nm (visible spectrum)	Defines color output accuracy
Forward Current	2-30 mA typical	Impacts brightness and longevity
Viewing Angle	5-120 depending on lens design	Dictates light distribution pattern
MTBF	50,000-100,000 hours	System reliability prediction

5. Application Fields

Key industries include:

Consumer Electronics: Smartphones, laptops, home appliances
Industrial Automation: PLC status indicators, HMI panels
Automotive: Dashboard lighting, warning indicators
Medical Equipment: Diagnostic status visualization

6. Leading Manufacturers and Products

Manufacturer	Product Series	Key Features
Cree	XLamp XR	High-brightness automotive indicators
OSRAM	LED Line	Programmable RGB light bars
Nichia	NSPWR70CSS	Ultra-compact bar graph displays
Everlight	DLW-5xxx	Waterproof array modules

7. Selection Recommendations

Key considerations:

Environmental Conditions: Temperature (-40 to +85 C operational range)
Optical Requirements: Color consistency (CIE 1931 standard)
Electrical Compatibility: Driver circuit matching
Form Factor: 0402-5050 package size constraints
Cost Optimization: Trade-off between performance and budget

Industry Trend Analysis

Current trends show:

Micronization: Development of 0201 package formats
Smart Integration: Embedded ICs for addressable lighting
Energy Efficiency: Sub-1mA operational current devices
Automotive Growth: HUD and LiDAR indicator applications
Medical Advancements: UV/IR spectrum specialized indicators