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

Part Number	Description / PDF	Quantity
5913001102LF Dialight	LED PRISM 3MM BICOLOR RD,GN SMD	0
5503008F Dialight	LED 5MM RT ANG RED/GRN DIFF PCMT	0
5962023002F Dialight	596 PRISM SMD 1.6MM BILEVEL RND	0
5510001844F Dialight	LED CBI 3MM RED SGL BLK RA	0
5962423013F Dialight	596 PRISM SMD 1.6MM BILEVEL RND	0
5530222103F Dialight	LED CBI 3MM BI-LVL GRN/GRN DIFF	0
5952701007F Dialight	LED PRISM 2MM SQ ALLNGAP YLW SMD	0
5503005F Dialight	LED 5MM RT ANG RED/GRN DIFF PCMT	2061
5614101055F Dialight	LED 2.5MM X 7MM VERT RED PC MNT	0
5682212222F Dialight	LED CBI 3MM 4X1 GRN,GRN,GRN,GRN	17
5501304F Dialight	LED 5MM VERT LOW CUR GREEN PCMNT	2147
5680122222F Dialight	LED CBI 4X1 RECT GRN,GRN,GRN,GRN	1616
5615601070F Dialight	LED 5MM VERT SUP CLEAR GRN PC MT	0
5912901013F Dialight	LED PRISM 3MM RND INGAN GRN SMD	0
5552003F Dialight	LED 2MM 5V RT ANGLE RED PCMNT	2677
5923535313F Dialight	LED CBI PRISM BLVL RGB/RGB TRSIL	425
5680704445F Dialight	LED CBI 3MM QUAD LEVEL	0
5952401007NF Dialight	2MM PRISM Y- 7 REEL	1390
5690103333F Dialight	LED 2X2 3MM HI DENSITY YEL PCMNT	301
5530113200F Dialight	LED CBI 3MM BI-LVL RED/YELLOW	474

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