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

Part Number	Description / PDF	Quantity
5500207004F Dialight	LED 5MM QUAD GREEN PC MNT	75
5912504002F Dialight	LED PRISM 3MM RND LC ORN SMD	0
5555009F Dialight	LED CBI 2MM RED 5V RES QUAD TH	237
5912701013F Dialight	LED PRISM 3MM RA ALGAAS ALBER SM	1493
5612301100F Dialight	LED 5MM VERT HIEFF DIFF YEL PCMT	0
5501204F Dialight	LED 5MM VERT LOW CUR YELLOW PCMT	0
5952902002SF Dialight	LED PRISM 2MM SQ INGAN GREEN SMD	0
5500505F Dialight	LED 5MM 5V RT ANGLE RED PC MNT	0
5912601013F Dialight	LED 3MM PRISM BLUE SMD	0
5510604F Dialight	LED CBI 3MM GREEN RV RES RA	0
5505504F Dialight	LED 5MM VERT SUP CLEAR RED PCMNT	1103
5500205F Dialight	LED 5MM RT ANGLE GREEN PC MNT	2765
5530301F Dialight	LED CBI 3MM BI-LVL BLANK/RD DIFF	0
5530113F Dialight	LED CBI 3MM BI-LVL RED/YELLOW	0
5922422302F Dialight	LED CBI PRISM BLVL YW/GRN SIL	0
5710133F Dialight	LED 2MM BI-LEVEL YLW/YLW DIFF	619
5000037F Dialight	KIT MINI DESIGN OPTOPIPE	60
5530711300F Dialight	LED 2HI 3MM RED/GRN BICLR PCMNT	881
5510803F Dialight	LED CBI 3MM HI EFF BLUE RA	0
5912201107F Dialight	LED PRISM 3MM SQ HI INT GRN SMD	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