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

Part Number	Description / PDF	Quantity
WP4060VH/IGD Kingbright	REDGREEN BI-LEVEL CIRCUIT BOARD	11976
WP406A10XHA/X2GD Kingbright	1.8MM GREEN TRI-LEVEL LED	100
WP1503CB/SRD Kingbright	5MM ALGAAS RA.RED LED	0
KB2350EW Kingbright	LED LIGHT BAR 19.05X3.81MM RED	2273
WP1503CB/GD Kingbright	5MM RA.GRN.LED	33588
WP934ZH/GD Kingbright	LED 3MM RA 565NM GRN GRN DIFF	13223
KB2855SGD Kingbright	LED LIGHT BAR 8.89X8.89MM GREEN	6789
WP934AD/YD Kingbright	YELLOW RIGHT ANGLE LED INDICATOR	119
WP1503EB/2GD Kingbright	5MM.2 POS.RA.GRN LED	923
WP934SA/3GD Kingbright	LED IND 3MM TRI-LVL RA GRN DIFF	3655
DE2ID Kingbright	LED LIGHT BAR 7.5X14MM RED	998
WP7104GE/SRCGKW Kingbright	3MM 2-LEVEL RED/GREEN LED INDICA	250
WP934MD/LILGD Kingbright	REDGREEN BI-LEVEL LED INDICATOR	13773
WP934EW/GD5V Kingbright	GREEN RIGHT ANGLE LED INDICATOR	7171
AA3528AVU/AQBS/D Kingbright	LED 3MM 1-LEVEL BLUE SMD	0
KB2300EW Kingbright	LED LIGHT BAR 8.89X3.81MM RED	3401
WP934CA/2GD-90 Kingbright	LED 3MM BI-LEVEL 565NM GRN DIFF	661
WP1043SGD Kingbright	LED LIGHT BAR SGL 3.65X6.15MM GN	0
WP934EB/2ID Kingbright	LED IND 3MM BI-LVL RA RED DIFF	0
KB2800SGD Kingbright	LED LIGHT BAR 8.89X3.81MM DL GRN	368

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