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

Part Number	Description / PDF	Quantity
5912101002F Dialight	LED PRISM 3MM RND ALGAAS RED SMD	15
5505305F Dialight	LED 5MM RT ANG SUP DIFF YEL PCMT	822
5912404102F Dialight	LED PRISM 3MM RND LC SQ YLW SMD	0
5511107F Dialight	LED 3MM LOW CURR RED	2213000
5501205F Dialight	LED 5MM RT ANG LOW CUR YEL PCMNT	0
5710133100F Dialight	LED CBI 2MM BI-LEVEL YW,YW DIFF	480
5690109999F Dialight	LED 3MM BI-LEVEL 2X2 BLUE DIFF	0
5710122100F Dialight	LED CBI 2MM BI-LEVEL GN,GN DIFF	881
5530233200F Dialight	LED CBI 3MM BI-LVL YLW/YLW DIFF	0
5952101002F Dialight	LED PRISM 2MM SQ RED 660NM SMD	211
5530322F Dialight	LED 3MM 5V GREEN	64
5501610806F Dialight	LED CBI 5MM YELLOW TINTED	0
5530211400F Dialight	LED CBI 3MM BI-LVL RED/RED DIFF	0
5513009F Dialight	LED 3MM RTANG RED/GRN BICLR PCMT	11624
5530122400F Dialight	LED CBI 3MM BI-LVL GREEN/GREEN	720
5532222300F Dialight	LED 2HI 3MM CLEAR GREEN PC MNT	0
5500305F Dialight	LED 5MM RT ANGLE YELLOW PC MNT	684
5520221F Dialight	LED CBI 5MM BI-LVL GRN/RED DIFF	0
5952902007SF Dialight	LED PRISM 2MM SQ INGAN GREEN SMD	0
5952602013SF Dialight	LED PRISM 2MM SQ INGAN BLUE 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