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

Part Number	Description / PDF	Quantity
5710111F Dialight	LED 2MM BI-LEVEL RED/RED DIFF	4099
5501104F Dialight	LED 5MM VERT LOW CUR RED PCMNT	34
5511109F Dialight	LED 3MM RT ANG LOW CUR RED PCMNT	4100
5913101107SF Dialight	LED PRISM 3MM SQ YW,GN SILIC SMD	0
5680701111F Dialight	LED 4HI 3MM RED/GREEN BICLR PCMT	1474
5511307F Dialight	LED 3MM LOW CURR GREEN	4180
5530123F Dialight	LED 2HI 3MM GREEN OVER YEL PC MN	2241
5513508801F Dialight	LED CBI 3MM RED/GRN DIFF RA	6025
5912801113F Dialight	LED 3MM PRISM WHITE SMD	0
5640100222F Dialight	LED 3HI 3MM GREEN PC MNT	2230
5520833F Dialight	LED 2HI 5MM SUP BRIGHT YEL PCMNT	0
5640100209F Dialight	LED CBI 3MM 3X1 GRN/BLANK/BLUE	0
5612301070F Dialight	LED 5MM VERT HE DIFF YLW PC MNT	0
5530201200F Dialight	LED CBI 3MM BI-LVL BLANK/RED	0
5700100322F Dialight	LED CBI 2MM 3X1 YLW,GRN,GRN DIFF	0
5680731111F Dialight	LED 4HIGH GRN/RED BICLR 3MM	0
5530008813F Dialight	LED CBI 3MM R,Y,R,Y,R,Y,R,Y RA	0
5510409808F Dialight	LED 3MM CBI R/A R RV POL.125	0
5513011F Dialight	LED CBI 3MM RED/GRN BICOLOR RA	0
5640700101F Dialight	LED CBI 3MM 3X1 R/G,BLANK,R/G	11

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