LJ640U34 640x400 resolution screen test display
LJ640U34 640x400 resolution screen test display
Price: $555.00
$550.00/ piece
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LJ640U34 8.9 inch 640x400 TFT LCD display front view
LJ640U34 SHARP back label with model and serial number
LJ640U34 TTL / CMOS connector pinout interface detail
LJ640U34 8.9 inch 640x400 TFT LCD display front view
LJ640U34 SHARP back label with model and serial number
LJ640U34 TTL / CMOS connector pinout interface detail

LJ640U34 640x400 resolution screen test display

Price: $555.00
$550.00/ piece
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LJ640U34 640x400 resolution screen test display

Product Information Product Specifications
Model:
LJ640U34
Brand:
SHARP
Application:
Industrial
Size:
8.9"
Resolution:
640×400 84PPI
Brightness:
115 cd/m² (Typ.)
Signal Interface:
Parallel Data , 16 pins Connector
Panel Type:
EL, EL
Ordering instructions
Quality:
test ok before ship it
RMA Policy:
RMA 6 month
Sample:
Paid Sample
Stock:
199
Stock Location:
China
Delivery:
WorldWide
Lead Time:
1-3 Days
Weight:
1.000 KG
Overview

The LJ640U34 is a highly durable 8.9-inch TFT LCD display module manufactured by SHARP. Featuring a specific 640×400 resolution, this industrial screen is engineered to provide seamless drop-in replacements for legacy HMI panels, CNC machine tools, and medical diagnostic equipment. Designed to withstand harsh factory environments, this panel ensures stable performance and exact software UI compatibility without the need for system recalibration. ZYLCD Shop guarantees authentic SHARP components with rigorous functional and pixel testing before shipment.

Product Features

  • Exact 640×400 Resolution: Maintains the original aspect ratio and pixel mapping for legacy industrial software, preventing UI distortion or control button misalignment.

  • Industrial-Grade Reliability: Built by SHARP to endure 24/7 operation in demanding environments, featuring high resistance to vibration, dust, and electromagnetic interference.

  • High-Contrast Visibility: Optimized for clear readability on factory floors, ensuring operators can easily monitor critical machine parameters and alarms.

  • Legacy System Compatibility: Ideal for retrofitting aging equipment where modern high-resolution screens would require expensive motherboard or software upgrades.

  • Robust Mechanical Design: Standard mounting holes and durable bezel construction ensure a secure fit in existing control panel enclosures.

Technical Specifications

Model NumberLJ640U34
ManufacturerSHARP
Display Size8.9 Inch Diagonal
Resolution640(RGB) × 400
Panel Typea-Si TFT-LCD, Transmissive
Active AreaApprox. 189.4(W) × 118.4(H) mm (Verify datasheet)
Video InterfaceParallel RGB / TTL / CMOS (Verify specific FPC/Connector)
Brightnes11115 cd/m²
Contrast RatioTyp. 400:1
Viewing AngleTyp. 60/60/40/60 (L/R/U/D)
Operating Temp-10°C ~ +60°C (Industrial Grade)

Applications & Compatible Equipment

This 8.9" 640x400 TFT LCD module is widely utilized in legacy and specialized industrial systems:

  • CNC Machine Tool Operator Panels (FANUC, SIEMENS, Mitsubishi retrofits)

  • Industrial HMI & PLC Control Interfaces

  • Medical Diagnostic & Imaging Equipment

  • Injection Molding Machine Controllers

  • Test & Measurement Instruments

  • Marine Navigation & Avionics Legacy Displays

Why Choose ZYLCD Shop for Your SHARP LCD Replacement?

  • 100% Authentic SHARP Panels: We source directly from authorized channels; strictly NO refurbished, pulled, or counterfeit screens for critical industrial use.

  • Rigorous Quality Testing: Every LJ640U34 unit undergoes full functional inspection, including backlight uniformity, contrast checks, and pixel defect screening.

  • Global Fast Shipping: Secure anti-static and shock-proof packaging with tracked express delivery to minimize your production line downtime.

  • Expert Cross-Reference Support: Our engineering team provides compatibility verification for older SHARP part numbers to ensure a perfect fit for your machine.

Frequently Asked Questions

What type of backlight does the LJ640U34 use? Is it CCFL or LED?

Original SHARP LJ640U34 panels typically use CCFL (Cold Cathode Fluorescent Lamp) backlights, which require a specific high-voltage inverter board. Some modern replacement versions may be upgraded to LED backlights for longer lifespan. Please verify your machine's existing inverter output and connector type. If you are unsure, contact our support team with a photo of your original screen and inverter board before ordering.

Can I replace my broken 8.9 inch screen with a modern 1024x768 (XGA) panel?

Generally, no. Industrial software and CNC controllers are hardcoded for specific resolutions like 640x400. Upgrading to a higher resolution XGA panel will result in a cropped UI, misaligned touch coordinates, or a complete failure to display. The LJ640U34 is the exact match required to maintain your machine's original software functionality without expensive reprogramming.

How do I verify the interface pinout for the LJ640U34?

Because legacy industrial screens often have custom TTL/CMOS pinouts, we strongly recommend counting the pins on your video cable connector and comparing it with the official LJ640U34 datasheet. You can download the datasheet from our product resources or request it via email. Never force a connector, as incorrect pin mapping can instantly destroy the new LCD's driver IC or your machine's motherboard.

Restore Your Industrial Equipment Today

Don't let a faulty display halt your manufacturing line. Get a competitive quote for the LJ640U34 8.9" 640x400 TFT LCD today with guaranteed authenticity and fast global delivery.

Product Comparison
Model:
Size:
Resolution:
Brightness:
Contrast Ratio:
Viewing Angle:
Lamp Type:
Signal Interface:
Panel Type:
LJ640U34 640x400 resolution screen test display

LJ640U34 640x400 resolution screen test display

LJ640U34

8.9"
640×400 84PPI
115 cd/m² (Typ.)
Parallel Data , 16 pins Connector
EL, EL
LJ640U48 Sharp 9.4" EL  EL 640×480  VGA  84PPI

LJ640U48 Sharp 9.4" EL EL 640×480 VGA 84PPI

LJ640U48

9.4"
640×480, VGA 84PPI
80 cd/m² (Typ.)
100:1 (Typ.) (TM)
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self
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EL, EL
Sharp LJ640U32 8.9" TFT LCD Module  640×400 Industrial Display Panel

Sharp LJ640U32 8.9" TFT LCD Module 640×400 Industrial Display Panel

LJ640U32

8.9"
640×400 84PPI
self
TTL , 16 pins Connector
EL, EL
8.9 inch screen LJ640U31 lcd module 640*400 lcd display panel

8.9 inch screen LJ640U31 lcd module 640*400 lcd display panel

LJ640U31

8.9"
640×400 84PPI
self
TTL , 16 pins Connector
EL, EL
LJ640U34 is a 8.9" EL, EL Display screen Product from SHARP.According to SHARP's product specification sheet,LJ640U34 display has a resolution of 640×400 84PPI, Contrast Ratio is ,Viewing Angle is ,Lamp Type is ,Signal Interface is Parallel Data , 16 pins Connector,Brightness is 115 cd/m² (Typ.).Based on its characteristics, this model is recommended for application in Industrial and other products.The weight of LJ640U34 after packaging is 1.000KG.We have made every effort to minimize weighing variances; however, we cannot guarantee absolute accuracy.
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Original Factory-Sealed Panels

Every unit is sourced directly from AUO Optronics through Zhiyan's first-hand supply channel. No refurbished, no B-grade. Factory seal intact.

100% Original | Factory Sealed
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100% Pre-Ship Testing & 6-Month RMA

Each panel passes through our six-step quality chain—incoming, display, appearance, interface, packaging, and tracking. Backed by a 6-month RMA.

Test OK Before Ship | RMA 6 Months
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99 Units In Stock · Ships in 1–3 Days

Stocked in our Shenzhen Longhua warehouse. Standard lead time 1–3 business days; quotations returned within 24 hours.

99 In Stock | Lead Time 1-3 Days
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Worldwide Shipping with Full Tracking

DHL, FedEx, UPS and TNT available. ESD-safe packaging. Typical door-to-door delivery: 5–7 business days globally.

DHL · FedEx · UPS · TNT | Worldwide

Quality issue? Return freight is on us. Damaged in transit? We cover it in full.

Why 1,000+ Engineers Trust Zhiyan Since 2013

factory 18 Years of Industrial LCD Supply Chain Expertise

  • warehouse 30,000+ m² ready-to-ship warehouse with tens of millions of dollars of LCD inventory on hand
  • category 100,000+ LCD models covered — from mainstream panels to discontinued & hard-to-find EOL models
  • groups 200+ staff, including a dedicated engineering team of 10+ for pre-sales matching and after-sales support
  • handshake Direct factory sourcing from Kyocera, KOE, and NANYA; long-standing supply partnerships across Taiwan and South Korea
  • sync One-stop service: sourcing → evaluation → testing → packaging → global logistics → technical support

fact_check 6-Step Inspection — No Panel Ships Untested

inventory_2 Incoming
monitor Display Test
visibility Appearance
settings_input_component Interface
view_in_ar Packaging
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  • done_all Every panel is visually inspected, electrically powered-on tested, and interface-verified before packing
  • inventory_2 Anti-static, shock-proof professional packaging for international transit
  • verified What you see is what you get — product consistent with description, or return freight on us

verified_user Verified by Third Parties, Compliant in Your Market

Alibaba Verified Supplier Certificate
CITEO Membership Certificate
Der Grüne Punkt License
LUCID Registration Certificate
  • check TÜV Rheinland On-Site Verified Supplier (Alibaba.com Verified Supplier, Cert. No. 139632585_T) — factory audit covering production capacity, quality assurance & R&D
  • check EU Authorized Representative (EC REP) appointed — EUREPSTAR GmbH, Germany, valid 2025–2027, CE technical files maintained
  • check CITEO Registered (France, packaging EPR compliance, ID: FR293377_01SEXD)
  • check Der Grüne Punkt Licensed (Germany, VerpackG packaging compliance, Reg. No. DE4833497804557)
  • check All panels RoHS 2.0 compliant, lead-free, mercury-free WLED backlight
  • check Registered company: Shenzhen Zhiyan Optoelectronics Co., Ltd. — VAT/Reg. No. 91440300MA5GQNC36C

precision_manufacturing Trusted Across 13+ Industries Worldwide

Industrial Automation

HMI panels & factory control displays for automation integrators

Medical Devices

Auxiliary diagnostic & monitoring displays for medical device makers

POS/ATM

Replacement screens & bulk supply for POS/ATM manufacturers

Marine Electronics

Marine navigation display modules

Repair Market

EOL & obsolete panel sourcing for global repair centers

Embedded / OEM

Custom display solutions: touch bonding, brightness, cables, OEM labeling

Send us your LCD model number, application and quantity — our engineers will recommend a compatible solution within 24 hours.

local_shipping In Stock. Tested. Shipped in 1–3 Days.

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1–3 day lead time for in-stock items; same-day dispatch available in some cases

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Worldwide shipping via express couriers, full tracking from warehouse to door

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Every order follows the same chain: Warehouse → QC → Packaging → Shipping → You

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Transportation damage covered by us — zero risk on your side

What Buyers Say — 4.8/5 from Verified Orders

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local_shipping On Delivery

"My package arrived at the expected date (6 days after the purchase) and in good condition."
— Verified Buyer, Nov 2025

"Fast shipping, good communication, goods as described, will buy again."
— Verified Buyer, Aug 2025

support_agent On Service

"The communication with customer service was very smooth, the logistics speed was also fast, the product was consistent with the description."
— Verified Buyer, Aug 2025

"Fast delivery, competitive price, excellent support."
— Verified Buyer, Aug 2025

inventory_2 On Hard-to-Find Models & Price

"Good price for things hard to find!"
— Verified Buyer, Aug 2025

"Excellent quality, affordable price, worth recommending."
— Verified Buyer, Nov 2024

Join engineers and buyers from industrial automation, medical and marine industries — get your quotation within 24 hours.

Questions & Answers
Ask a Question >
Q:
How can I confirm if this screen is compatible with my mainboard? Do I need a driver?
A:
Compatibility depends on the interface (LVDS), voltage, resolution, and pinout. You need to compare the screen's datasheet with your mainboard's LVDS interface specifications. The screen itself is a plug-and-play hardware component, but your system or embedded board may need to be configured with the correct display parameters (like resolution and timing) to function properly.
Q:
What kind of backlight does this screen use, and what is its lifespan?
A:
It uses LED backlight technology. LED backlights are known for their long lifespan, typically lasting 30,000 hours or more, making them ideal for industrial environments that require long operating hours.
Q:
What is the operating temperature range for this industrial display?
A:
As an industrial-grade screen, the LJ640U34 is typically designed for a wide operating temperature range, such as -20°C to +70°C. However, please refer to the manufacturer's latest datasheet for the exact specifications.
Q:
What interface does the LJ640U34 industrial screen typically use?
A:
It typically uses an LVDS (Low-Voltage Differential Signaling) interface. Before connecting, please ensure your controller board supports LVDS output and verify the pin definitions and voltage compatibility.
Q:
What is the resolution and screen size of this LJ640U34 display?
A:
This display has an 8.9-inch screen size with a resolution of 640 (horizontal) x 400 (vertical) pixels. It's a common non-standard high-resolution screen used in industrial applications.
Customer Reviews
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Comprehensive Score
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P************k
Nov 10, 2025
(5/5)
My package arrived at the expected date (6 days after the purchase) and in good condition
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Very nice and sharp in the choice
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Aug 21, 2025
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Good price for things hard to find!
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Product arrived earlier than expected. Price was also very reasonable.
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The communication with customer service was very smooth, the logistics speed was also fast, the product was consistent with the description, and it was a good shopping experience.
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