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

Image Part Number Description / PDF Quantity Rfq
QLA694B-2I

QLA694B-2I

QT Brightek

LED 3MM BI-LVL RA RED DIFF

490

QBL7YG80D-MP4A

QBL7YG80D-MP4A

QT Brightek

LED SINGLE 3MM GREEN DIFFUSED

468

QBL8YG60D-MP94

QBL8YG60D-MP94

QT Brightek

LED 5MM BI-LVL RA GREEN DIFF

500

QLA694B-2A

QLA694B-2A

QT Brightek

LED 3MM BI-LVL RA ORANGE DIFF

0

QLA764B-3Y

QLA764B-3Y

QT Brightek

LED 3MM BI-LVL RA YELLOW DIFF

400

QBL8YA60D-MP7

QBL8YA60D-MP7

QT Brightek

LED SINGLE 5MM YELLOW DIFFUSED

500

QLA694B-2Y

QLA694B-2Y

QT Brightek

LED 3MM BI-LVL RA YELLOW DIFF

0

QBL7SA80D-MP4A

QBL7SA80D-MP4A

QT Brightek

LED SINGLE 3MM RED DIFFUSED

481

QBL7YA80D-MP4A

QBL7YA80D-MP4A

QT Brightek

LED SINGLE 3MM YELLOW DIFFUSED

0

QBL7OA80D-MP8B2

QBL7OA80D-MP8B2

QT Brightek

LED 3MM BI-LVL 4X2 ORANGE DIFF

119

QBL8RAYA60D-MP6

QBL8RAYA60D-MP6

QT Brightek

LED 5MM RA GRN/RED DIFF

500

QBL7SA80D-MP4B

QBL7SA80D-MP4B

QT Brightek

LED SINGLE 3MM RED DIFFUSED

0

QLA764B-3A

QLA764B-3A

QT Brightek

LED 3MM BI-LVL RA ORANGE DIFF

0

QLA874B-4G

QLA874B-4G

QT Brightek

LED 3MM BI-LVL RA GREEN DIFF

0

QBL7YA80D-MP8B2

QBL7YA80D-MP8B2

QT Brightek

LED 3MM BI-LVL 4X2 YELLOW DIFF

121

QLA874B-4Y

QLA874B-4Y

QT Brightek

LED 3MM BI-LVL RA YELLOW DIFF

300

QBL7SB80D-MP8B2

QBL7SB80D-MP8B2

QT Brightek

LED 3MM BI-LVL 4X2 RED DIFF

87

QBL8OA60D-MP92

QBL8OA60D-MP92

QT Brightek

LED 5MM BI-LVL RA ORANGE DIFF

500

QBL8RAYG60D-MP6

QBL8RAYG60D-MP6

QT Brightek

LED 5MM RA RED/YELLOW DIFF

500

QBL7YG80D-MP8B2

QBL7YG80D-MP8B2

QT Brightek

LED 3MM BI-LVL 4X2 GREEN DIFF

52

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

TypeFunctional FeaturesApplication Examples
IndicatorsSingle/dual-color point-source lighting for status indicationPower switches, network routers, medical device panels
ArraysMatrix configurations for alphanumeric/symbol displaySeven-segment displays, dot matrix modules
Light BarsLinear arrangements for directional lighting/brightness zonesAudio level meters, industrial control panels
Bar GraphsSegmented columns for quantitative visual representationBattery 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

ParameterDescriptionImportance
Luminous Intensity0.1-100 cd/m rangeDetermines visibility in various lighting conditions
Wavelength400-700 nm (visible spectrum)Defines color output accuracy
Forward Current2-30 mA typicalImpacts brightness and longevity
Viewing Angle5-120 depending on lens designDictates light distribution pattern
MTBF50,000-100,000 hoursSystem 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

ManufacturerProduct SeriesKey Features
CreeXLamp XRHigh-brightness automotive indicators
OSRAMLED LineProgrammable RGB light bars
NichiaNSPWR70CSSUltra-compact bar graph displays
EverlightDLW-5xxxWaterproof 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

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