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

Part Number	Description / PDF	Quantity
5912401013F Dialight	LED PRISM 3MM RT ANG YELLOW SMT	538
HLMP2550 Everlight Electronics	LED LT BAR HI EFF GREEN 4LED SIP	0
5700100123F Dialight	LED CBI 2MM 3X1 RED,GRN,YLW DIFF	1011
5680F7_7 Visual Communications Company, LLC	LED YELLOW T1 DUAL RIGHT ANG PCB	0
5650F1LC Visual Communications Company, LLC	LED RED T1 QUAD RIGHT ANGLE PCB	4750
5680701444F Dialight	LED CBI 3MM 4X1 R/G,Y/G,Y/G,Y/G	0
5640300111F Dialight	LED 3HI 3MM 5V RED PC MNT	0
5505604F Dialight	LED 5MM VERT SUP CLR GREEN PCMNT	0
593313131313F Dialight	LED PRISM	0
5553301F Dialight	LED 2MM VERTICAL GREEN PC MNT	9987
SSF-LXH100LGD-01 Lumex, Inc.	LED 5MM RA LOWCUR GREEN PC MNT	396
5952602002SF Dialight	LED PRISM 2MM SQ INGAN BLUE SMD	0
XGUGUYX10D SunLED	BAR GRAPH ARRAY 10-SEG G/Y BICLR	0
5612201060F Dialight	LED 5MM VERT HE DIFF GRN PC MNT	6702
5700100233F Dialight	LED CBI 2MM 3X1 GRN,YLW,YLW DIFF	0
H101CRD Califia Lighting (Bivar)	LED ASSY RA 3MM RED 655NM	246
5912304013F Dialight	LED GREEN PRISM/CBI 570NM SMD	15
5912004002F Dialight	LED PRISM 3MM RND LC RED SMD	780
LTA-1000G Lite-On, Inc.	LED BAR GRAPH 10-SEGMENT GREEN	7743
5952301002NF Dialight	LED PRISM 2MM SQ GREEN 560NM SMD	797

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