2025-04-02
Depth contrast analysis of LED chip and ordinary LED chip
Depth contrast analysis of LED chip and ordinary LED chip
one. Overview of core differences
| peculiarity | LED screen light beads | Ordinary LED lamp beads |
| Design objective | Image display (color/refresh rate/consistency) | Lighting (Light efficiency/brightness/life) |
| Optical property | High colorimetric/narrow spectrum/low crosstalk | High luminous flux/Wide spectrum/uniform luminescence |
| Structural feature | Miniaturization/high density integration | Monomeric/independent optical design |
| Driving mode | PWM dimming (MHz refresh) | Constant current drive (Low frequency /DC dimming) |
two.Depth comparison of photoelectric characteristics
1. Spectral characteristics
Screen light beads:
- RGB three-color independent light, color gamut coverage >90% DCI-P3
- Half Height width (FWHM)≤25nm (avoid color crosstalk)
- Color coordinate deviation Δu'v'<0.003 (JNCD<1)
Ordinary lamp beads:
- Wide spectrum white light (Blue chip + phosphor)
- Color rendering index CRI>80
- Color tolerance SDCM≤5 (ANSI standard)
2. Brightness and gray scale
| argument | Screen lamp bead | Ordinary lamp bead |
| Peak brightness | 1000-5000nit (HDR) | 50-200lm (Lighting) |
| Depth of grey scale | 16bit (65536 level) | 8bit (256 level) |
| Minimum brightness | <0.01nit (Dark field performance) | Usually >1% rated brightness |
3. Response speed
Screen light beads:
- Response time <1μs (480Hz refresh rate supported)
- PWM dimming frequency ≥20kHz (no stroboscopic)
Ordinary lamp beads:
- Response time 1-10ms
- The dimming frequency is usually <1kHz
Three.mechanical structure differences
1. Packaging technology comparison
| Package type | Screen lamp bead | Ordinary lamp bead |
| Size | Micron (Mini LED: 50-200μm) | Mm class (2835/5050 package) |
| Integration degree | COB/IMD technology (10,000 units per square meter) | Single piece independent package |
| Heat dissipation design | Active heat dissipation (uniform temperature plate + graphene) | Passive cooling (aluminum substrate) |
2. Material differences
Screen light beads:
- Substrate: ceramic or glass (CTE matching ±1ppm/℃)
- Phosphor: KSF red powder (narrowband emission, half height width 30nm)
Ordinary lamp beads:
- Substrate: Aluminum substrate (cost preferred)
- Phosphor: YAG yellow powder (broadband emission)
Four.Drive and control technology
1. Driver IC differences
Screen light beads:
- Dedicated driver ics (such as TI's TLC6C series)
- Single channel independent control (16bit accuracy)
- Data rate >50Mbps (for 8K transmission)
Ordinary lamp beads:
- Universal constant current IC (e.g. PT4115)
- Parallel/series group control
- Analog dimming dominates
2. Signal processing
| Feature | Screen lamp bead | Ordinary lamp bead |
| Gamma correction | 14bit programmable | Fixed curve |
| Color management | 3D-LUT real-time calibration | no |
| Temperature compensation | Temperature sensor per pixel | Integral temperature control |
Five.Reliability standard comparison
| Test item | Screen lamp bead standard | Common lamp bead standard |
| Life definition | Brightness attenuation to 50% (T50) | Attenuation to 70% (L70) |
| Environmental testing | 85℃/85%RH 2000h | 65℃/95%RH 1000h |
| Pixel failure rate | <1ppm (parts per million) | < 1% |
Six.Typical application scenario
1. Screen light beads
- Micro LED Array: Apple Vision Pro (pixel pitch 10μm)
- Mini LED backlight: iPad Pro (2500 partition dimming)
- Small pitch display: LED cinema (P0.9mm pitch)
2. Ordinary lamp beads
- Home Lighting (Bulb/tube)
- Industrial lighting (Mining lights)
- Outdoor lighting (street lights)
Seven.Cost and market
| dimensionality | Screen lamp bead | Ordinary lamp bead |
| Per-shot cost | $0.1-10 (depending on size technology) | $0.001-0.1 |
| Failure cost | For a single bad spot, you need to replace the entire module | Single can be replaced |
| Technical threshold | Semiconductor grade process control required | Conventional packaging technique |
For more knowledge about LED industry, please pay attention to our LIKELIGHT.If you are not sure which LED fixture is best for your project or need help with layout configuration, contact us LIKLEIGHT, we are a professional manufacturer of LED lamps in China;we have engineers and 24 hours customer service for you.Phone:+86-755-23328395, Email :contact@like-light.com,Wechat/WhatsApp:86-132-66666-320.
