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

Part Number	Description / PDF	Quantity
5962020002F Dialight	596 PRISM SMD 1.6MM BILEVEL RND	0
5532212100F Dialight	LED CBI 3MM BI-LVL RED/GRN TINT	41
5710113F Dialight	LED CBI 2MM BI-LEVEL RED-YLW	0
5530222810F Dialight	LED CBI 3MM BI-LVL GRN/GRN DIFF	0
5690711100F Dialight	LED CBI 3MM BI-LEVEL R/G,R/G	0
5922222302F Dialight	LED CBI PRISM BLVL GN/GN SIL	0
5640100231F Dialight	LED CBI 3MM 3X1 GRN/YLW/RED DIFF	0
5913001102SF Dialight	LED PRISM 3MM RED,GRN SILIC SMD	0
5505208F Dialight	LED CBI 5MM GRN DIFF 25A	0
5913001849F Dialight	LED SMD PRISM RED/GRN 85CM LEAD	0
5670122F Dialight	LED 2X4MM BI-LVL GN,GN TINT DIFF	0
5501710807F Dialight	LED CBI 5MM RED TINTED	0
5640700828F Dialight	LED CBI 3MM 3X1 BI-COLOR	0
5510401F Dialight	LED CBI 3MM DIN RED DIFF RA SGL	959
5913001013LF Dialight	LED PRISM 3MM BICOLOR RD,GN SMD	0
5510504F Dialight	LED CBI 3MM RED 5V RES RA	0
5660307F Dialight	LED 2MM X 5MM RT ANGLE YEL PCMNT	118
5912701113F Dialight	LED PRISM 3MM SQ ALLINGAP YW SMD	0
5912901107F Dialight	LED SMD PRISM 3MM TRUE GREEN SQ	0
5555301F Dialight	LED 2MM QUAD GREEN	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