Prezentare generală a produsului: A High-Reliability PCB Solution for LCD Display Driving
UGPCB introduceLCD Liquid Crystal Display PCB Circuit Board (Model: UGPCB-LCD-001), o performanta2-layer rigid FR-4 printed circuit board engineered specifically for liquid crystal display driving applications. This product uses Kingboard KB6165F high-end copper-clad laminate as the base material, with a board thickness of 1.6 mm și 1 oz folie de cupru (aproximativ 35 μm). The surface finish employs theDe acord (Nichel electroless/aur de imersie) process at 2U” . Consiliul masoara 147.2 × 65 mm, with a minimum hole diameter of 0.22 mm și lățimea/distanța minimă a liniilor de 0.3 mm/0.27 mm.
AcestLCD display PCB serves as the critical circuit carrier that connects display driver chips to liquid crystal glass panels. It finds extensive applications in small to medium-sized LCD display modules, industrial control panel displays, automotive infotainment system displays, and smart home human-machine interaction interfaces.
Definiția produsului: What Is an LCD Liquid Crystal Display PCB?
Un PCB cu afișaj LCD cu cristale lichide (Placă de circuit tipărită) is a specialized circuit board designed for liquid crystal display driving systems. It performs three core functions: driving signal transmission, distribuția puterii, and timing control signal routing. Spre deosebire de standard PCB circuit boards, un LCD display PCB demands tighter tolerances in line width precision, controlul impedanței, and surface flatness.
This product belongs to therigid double-sided PCB category with 2 straturi (2L). It uses FR-4 grade flame-retardant material (Ul 94 V-0 evaluat) and supports both SMT (Tehnologia de montare a suprafeței) and through-hole component hybrid assembly processes. The board meets IPC-6012 Class 2 cerințe de performanță, making it suitable for industrial electronics and consumer electronics applications.
Specificații de proiectare: Critical Parameters for LCD PCB Engineering
Material de substrat: The KB6165F Advantage
This product uses Kingboard KB6165F copper-clad laminate, which delivers the following key performance characteristics:
- Temperatura de tranziție a sticlei (TG): ≥150°C, ensuring dimensional stability during lead-free reflow soldering processes
- Temperatura de descompunere termică (TD): 325° C., providing excellent thermal reliability
- Evaluarea inflamabilității: Ul 94 V-0, with flame self-extinguishing within 10 seconds in vertical burn tests
- Cte (Coeficient de expansiune termică): 12–15 ppm/°C in X-Y direction, 40–230 ppm/°C in Z direction, offering good thermal matching with LCD driver ICs
- Caf (Filament Anodic Conductiv) Rezistenţă: Excellent anti-CAF performance ensuring long-term reliability
- Compatibil fără plumb: Meets RoHS environmental requirements
According to IPC-2221 design standards, materials with Tg ≥150°C are suitable for lead-free assembly processes, capable of maintaining structural integrity under reflow soldering peak temperatures reaching 245–260°C.
Layer Count and Stack-up Design
The product features 2 straturi (2L) with a standard 1.6 mm grosimea plăcii. Pentru IPC-2221, 1.6 mm represents the most commonly used thickness specification for rigid PCB -uri, balancing mechanical strength with assembly convenience.
Line Width and Spacing Design
Lățimea minimă a liniei de 0.3 mm and minimum line spacing of 0.27 mm are carefully selected parameters forLCD driver PCB integritatea semnalului. Under IPC-2221 standards, the minimum spacing requirement for conventional voltage (≤30V) digital signal traces is 0.1 mm (4 mil). This product’s 0.27 mm (aproximativ 10.6 mil) spacing far exceeds the IPC minimum requirement, providing ample margin for signal quality.
Design Calculation Reference (based on IPC-2221 outer layer conductor current-carrying capacity simplified formula):
Outer layer trace current-carrying capacity ≈ k × ΔT^0.448 × W^0.725 × T^0.725
Where k = 0.048 (for outer layer). La o creștere a temperaturii cu 10°C, o 0.3 mm trace with 1 oz copper thickness delivers a theoretical current-carrying capacity of approximately 1.2–1.5 A—sufficient for the power and signal trace requirements of conventional LCD driver boards.
Diametrul minim al găurii
The minimum hole diameter of 0.22 mm (aproximativ 8.7 mil) falls within the precision drilling category. Under IPC-6012, the standard drilled hole diameter tolerance is ±0.08 mm (approximately ±3 mil) . Pentru 0.22 mm micro-vias, manufacturing tolerances are typically controlled within ±0.05 mm.
Finisaj de suprafață: ENIG at 2U”
TheDe acord (Nichel electroless/aur de imersie) surface finish with 2U” grosimea aurului (aproximativ 0.05 μm) complies with IPC-4552 requirements. IPC-4552 Revision A (issued in 2017) specifies gold deposit thickness of 0.04 μm la 0.10 μm (1.6 μin to 4.0 min) and nickel thickness of 3 μm la 6 μm.
ENIG Surface Finish Advantages:
- Excellent solderability supporting multiple reflow cycles
- Strong wire bonding capability
- Superior oxidation and corrosion resistance
- Flat surface suitable for fine-pitch component mounting
- Termen de valabilitate extins
Principiul de funcționare: Signal Transmission Mechanisms of the LCD Display PCB
TheLCD liquid crystal display PCB operates on two core functions: transmiterea semnalului şidistribuția puterii.
1. Display Driver Signal Transmission: Display data from the main controller chip (MCU/SoC) travels through thePlaca de circuite PCB via microstrip or stripline traces to the LCD driver IC. The driver IC converts digital signals into analog grayscale voltages, which are then output through thePCB‘s fine traces to the ITO electrodes on the liquid crystal glass panel, controlling the twist angle of liquid crystal molecules to produce the displayed image.
2. Timing Control Signal Routing: TheLCD display PCB carries critical timing signals including VSYNC (Vertical Sync), HSYNC (Horizontal Sync), DCLK (Pixel Clock), and DE (Data Enable). The transmission delay and impedance matching of these signals directly affect display quality.
3. Power Management Distribution: TheLCD circuit board converts the input power (de obicei 3.3 V sau 5 V) through DC-DC conversion circuits to generate the multiple voltage levels required by the LCD panel, including VGH (gate-on voltage, de obicei +15 V la +30 V), VGL (gate-off voltage, typically −5 V to −15 V), and AVDD (analog power voltage).
Clasificarea produselor: LCD PCB Categories
LCD liquid crystal display PCBs pot fi clasificate după următoarele dimensiuni:
După numărul de straturi
- Single-sided boards: Used for simple segment-code LCD displays
- Double-sided boards (2L): This product’s category, used for small to medium-sized TFT-LCD display drivers
- Plăci multistrat (4L and above): Used for high-resolution, large-format display modules
După finisarea suprafeței
- ENIG boards: This product’s category, offering the best overall performance
- OSP boards: Lower cost, suitable for short-lifecycle consumer electronics
- HASL boards: Suitable for LCD driver boards with wider pin pitches
Prin cerere
- Consumer Electronics LCD PCBs: Smartphone secondary displays, smartwatch displays, e-reader screens
- Industrial Control LCD PCBs: Industrial HMI, instrument panel displays, CNC operation panel display drivers
- Automotive LCD PCBs: Sisteme de infotainment în interiorul vehiculului, digital instrument clusters, HUD display control boards
- Medical Device LCD PCBs: Patient monitors, ultrasound diagnostic equipment, medical imaging system display driver boards
Core Performance Specifications
| Parametru | Caietul de sarcini | Standard de referință |
|---|---|---|
| Laminate Material | KB6165F (Kingboard) | - |
| Tip laminat | FR-4 Glass Fabric Copper-Clad Laminate | Ul 94 V-0 |
| Număr de straturi | 2 straturi (2L) | - |
| Grosimea plăcii | 1.6 mm | IPC-2221 |
| Grosimea stratului exterior de cupru | 1 Oz (35 μm) | IPC-6012 Class 2 |
| Finisaj de suprafață | DOAR 2U” (0.05 μm Au) | IPC-4552 |
| Nickel Layer Thickness | 3–6 μm (underlayer) | IPC-4552 Rev A |
| Diametrul minim al găurii | 0.22 mm | IPC-6012 |
| Lățimea minimă a liniei | 0.3 mm | IPC-2221 |
| Spațiere minimă între linii | 0.27 mm | IPC-2221 |
| Dimensiunile plăcii | 147.2 × 65 mm | - |
| TG (Temperatura de tranziție a sticlei) | ≥150°C | - |
| TD (Temperatura de descompunere termică) | 325° C. | - |
| Cte (X-Y Direction) | 12–15 ppm/°C | - |
| Evaluarea inflamabilității | Ul 94 V-0 | UL 94 |
| Rezistență la arc | ≥60 seconds | - |
| Rezistivitatea suprafeței | ≥2.6 × 10⁸ MΩ | - |
| Rezistivitatea volumului | ≥3.4 × 10⁹ MΩ·cm | - |
Product Structure Analysis
TheLCD liquid crystal display PCB structure comprises the following layers from outside to inside:
1. Outer Layer – ENIG Surface Finish: Gold layer at 2U” (aproximativ 0.05 μm) protects the underlying nickel layer from oxidation. The bottom nickel layer at 3–6 μm serves as a diffusion barrier between copper and gold.
2. Copper Foil Layer: 1 Oz (aproximativ 35 μm) folie de cupru electrodepusă, etched to form the circuit pattern.
3. Dielectric Layer: FR-4 grade glass fabric impregnated with epoxy resin, aproximativ 0.7 mm grosime (single layer), providing electrical insulation and mechanical support.
4. Copper Foil Layer: Stratul inferior 1 oz copper forming the bottom circuit pattern.
5. Outer Layer – ENIG Surface Finish: Symmetrical ENIG treatment matching the top layer.
Caracteristicile produsului: Why Choose UGPCB’s LCD Display PCB?
① High-Precision Manufacturing: Minimum hole diameter of 0.22 mm și lățimea/distanța minimă a liniilor de 0.3 mm/0.27 mm support the routing requirements of high-density LCD driver boards.
② Premium Substrate Materials: Kingboard KB6165F high-end FR-4 material with Tg ≥150°C and UL 94 V-0 flammability rating ensures lead-free process compatibility and long-term reliability.
③ Standardized Surface Finish: DOAR 2U” process complies with IPC-4552, delivering excellent solderability, rezistenta la oxidare, and extended shelf life.
④ Rigorous Quality Control: Products undergo full-process quality control per IPC-6012 Class 2 Standarde, covering hole diameter tolerance (±0.08 mm), hole copper thickness (≥20 μm), solder mask integrity, și testarea electrică.
⑤ LCD-Optimized Design: Controlul impedanței, integritatea semnalului, and power integrity are optimized specifically for liquid crystal display driving applications.
Procesul de fabricație: De la materie primă la produs finit
UGPCB follows a rigorous standard manufacturing process forLCD display PCBs:
1. Tăierea Materialului →2. Inner Layer Pattern Transfer (drill positioning and registration marks) →3. Foraj (minimum hole diameter 0.22 mm ± 0.08 mm) →4. Electroless Copper Deposition/Electroplating (metalizarea orificiilor, hole copper thickness ≥20 μm) →5. Outer Layer Pattern Transfer (lățimea liniei 0.3 mm / spaţiere 0.27 mm) →6. Placare cu model (copper build-up to 1 Oz) →7. Gravură →8. Imprimare masca de lipit →9. Finisaj de suprafață ENIG (De acord, gold thickness 2U”) →10. Profilare (dimensiuni 147.2 × 65 mm) →11. Testare electrică (100% test electric) →12. Inspecție finală (Aoi + inspecție vizuală) →13. Ambalare și transport
Scenarii tipice de aplicare
📱 Consumer Electronics: Smartphone secondary displays, smartwatch displays, e-reader screen driver PCBs.
🏭 Industrial Control: PLC human-machine interfaces (HMI), industrial instrument displays, CNC operation panel display driver boards.
🚗 Automotive Electronics: Sisteme de infotainment în interiorul vehiculului, digital instrument clusters, head-up display (HUD) display control PCBs.
🏥 Medical Devices: Patient monitors, ultrasound diagnostic equipment, medical imaging system display driver circuit boards.
🏠 Smart Home: Smart access control system displays, smart appliance control panels, building intercom system display module PCBs.
De ce să alegeți UGPCB?
UGPCB brings years of LCD display PCB manufacturing experience to every project. We use premium raw materials like Kingboard KB6165F, strictly enforce IPC-6012 Class 2 standarde de calitate, and operate high-precision drilling and circuit patterning equipment. Fie că ai nevoie LCD Prototiparea PCB sau producție în volum, UGPCB delivers high-precision, high-reliability product solutions.
📞 Get Your LCD Display PCB Solution Today
UGPCB LCD liquid crystal display PCBs have been successfully deployed in numerous industrial, auto, and consumer electronics display projects. Fie că ai nevoie LCD PCB prototyping for design validation or PCB turnkey assembly services, UGPCB provides full-process support from PCB fabrication to PCB ansamblu SMT.
Contact UGPCB’s professional team today for your custom LCD display PCB solution!
📧 E-mail: [info@ugpcb.com]
📞 Telefon: [+86-755-XXXXXXXX]
🌐 Site web: [www.ugpcb.com]
Atribuirea sursei de date
The technical standards and data cited in this document are derived from the following authoritative sources:
- IPC-6012 –Specificații de calificare și performanță pentru plăci imprimate rigide – Defines PCB hole diameter tolerances (standard ±0.08 mm), hole copper thickness (Clasă 2 ≥20 μm), and performance class requirements
- IPC-2221 –Standard generic pentru designul plăcii imprimate – Specifies line width/spacing design requirements and current-carrying capacity calculation formulas
- IPC-4552 Revision A (emis 2017) –Specificații de performanță pentru nichel electroless/aur de imersie (De acord) Placare pentru plăci imprimate – Specifies ENIG deposit thickness requirements: nickel 3–6 μm, gold 0.04–0.10 μm
- Ul 94 –Standard pentru siguranța inflamabilității materialelor plastice pentru piesele din dispozitive și aparate – V-0 rating requires flame self-extinguishing within 10 secunde
- Kingboard KB6165F Product Datasheet – Substrate technical parameters (Tg ≥150°C, Td 325°C, Ul 94 V-0, etc.)
- GB/T 4677 –Test Methods for Printed Boards – Used in conjunction with IPC standards as inspection references
