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

Part Number	Description / PDF	Quantity
MV57164 Everlight Electronics	LED BARGRAPH 10-SEG HI EFF RED	8032
HLMP2755 Everlight Electronics	LED LT BAR YELLOW 4LED DIP	0
HLMP-2685 Everlight Electronics	LED LT BAR HI EFF RED 8LED DIP	43
HLMP2885 Everlight Electronics	LED LT BAR HI EFF GREEN 8LED DIP	0
HLMP2400 Everlight Electronics	LED LT BAR YELLOW 2LED SIP	0
HLMP2300 Everlight Electronics	LED LT BAR HI EFF RED 2LED SIP	12125
MV64539MP7 Everlight Electronics	LED SS GREEN DIFFUSED LP PCB 5MM	13500
MV53164 Everlight Electronics	LED BARGRAPH 10-SEG YELLOW	0
HLMP2855 Everlight Electronics	LED LT BAR HI EFF GREEN 4LED DIP	0
MV67539MP7 Everlight Electronics	LED SS HI EFF RED DIFF PCB 5MM	0
MV5364MP4B Everlight Electronics	LED SS YELLOW DIFFUSED PCB 3MM	0
MV63539MP6 Everlight Electronics	LED SS YELLOW DIFF LP PCB 5MM	2195
HLMP2350 Everlight Electronics	LED LT BAR HI EFF RED 4LED SIP	0
HLMP2550 Everlight Electronics	LED LT BAR HI EFF GREEN 4LED SIP	0
MV5064MP4B Everlight Electronics	LED SS RED DIFFUSED PCB 3MM	0
HLMP2785 Everlight Electronics	LED LT BAR YELLOW 8LED DIP	0
MV5464MP4B Everlight Electronics	LED SS GREEN DIFF RA PCB 3MM	10
HLMP2500 Everlight Electronics	LED LT BAR HI EFF GREEN 2LED SIP	2893
HLMP1790C2R0 Everlight Electronics	LED SS GRN DIFF LO CURR PCB 3MM	0
MV54164 Everlight Electronics	LED BARGRAPH 10-SEG HI EFF 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