Sharp LQ084V1DG21 8.4 Inch TFT LCD Panel

The Sharp LQ084V1DG21 is an 8.4-inch a-Si TFT-LCD module designed for industrial and embedded equipment requiring a compact VGA-format display. It provides a 640 × 480 pixel resolution, 4:3 aspect ratio, and a TN, normally white, transmissive display configuration. The panel has a 170.88 × 129.6 mm active display area and supports 262K colors.

The display offers a typical luminance of 300 cd/m² and a typical contrast ratio of 250:1. It features an antiglare surface with haze treatment, hard coating, and antireflection treatment. Its viewing direction is specified at 12 o'clock, with a typical viewing angle of 55/55/55/40 degrees under the stated contrast-ratio condition.

The LQ084V1DG21 uses a Parallel RGB interface with a 1-channel, 6-bit configuration and a 31-pin connector. It supports a typical 3.3V/5.0V VCC supply and uses one CCFL backlight with a specified life of 50,000 hours. The panel is listed as refurbished and is particularly relevant for replacement applications involving legacy industrial equipment, instrumentation, control systems, and embedded displays.

Key Features

·        Sharp LQ084V1DG21 industrial TFT-LCD module

·        8.4-inch diagonal display

·        640 × 480 VGA resolution

·        94 PPI pixel density

·        a-Si TFT-LCD technology

·        TN, Normally White, Transmissive display mode

·        4:3 display format

·        300 cd/m² typical luminance

·        250:1 typical contrast ratio

·        262K supported colors

·        170.88 × 129.6 mm active area

·        Antiglare surface treatment

·        3H hard coating

·        Antireflection treatment

·        12 o'clock optimal viewing direction

·        Parallel RGB interface

·        1-channel, 6-bit configuration

·        31-pin connector

·        3.3V/5.0V typical VCC supply

·        One CCFL backlight

·        50,000-hour specified backlight life

·        No separate backlight driver specified for the module

·        Refurbished condition

Technical Specifications

Temperature specification note: Technical references for the same model also report 0°C to +55°C operating and -25°C to +70°C storage. Because the supplied product page lists -25°C to 70°C operating and 0°C to 60°C storage, buyers should verify the applicable temperature specification against the specific module and documentation before use in temperature-critical equipment.

8.4 Inch 640 × 480 VGA Display

The Sharp LQ084V1DG21 features an 8.4-inch display with a 640 × 480 VGA resolution. The 4:3 format and 170.88 × 129.6 mm active area make it suitable for equipment designed around traditional VGA industrial display formats.

The 94 PPI pixel density provides sufficient detail for displaying machine parameters, menus, measurement values, status information, control interfaces, and other graphical information commonly found in industrial equipment.

For replacement applications, the 8.4-inch diagonal size and 640 × 480 resolution should not be used as the only compatibility criteria. Active area, outline dimensions, mounting arrangement, connector, pin assignment, interface, supply voltage, and backlight configuration should all be compared with the original panel.

Display Technology

The LQ084V1DG21 uses amorphous silicon TFT-LCD technology with a TN, Normally White, Transmissive operating mode. The TFT structure allows the panel to control individual pixels and display text, graphics, measurements, and other visual information.

The TN configuration is common in older industrial TFT displays and can have different viewing characteristics from IPS or other modern LCD technologies. This is important when replacing an original display because a replacement panel with the same resolution may not provide the same optical characteristics.

The panel uses a vertical RGB stripe pixel arrangement and supports 262K colors.

Brightness and Contrast

The LQ084V1DG21 has a typical luminance of 300 cd/m² and a typical contrast ratio of 250:1. These specifications describe the panel's light output and its ability to distinguish between darker and brighter portions of an image.

The display also incorporates antiglare, hard coating, and antireflection treatments. The supplied product information specifies Haze 28% and 3H hard coating. These surface characteristics can be relevant in industrial environments where reflected ambient light and physical handling are considerations.

The specified viewing angles are 55° left, 55° right, 55° up, and 40° down under the stated CR ≥ 10 measurement condition. The specified optimal viewing direction is 12 o'clock.

Interface and Connector

The Sharp LQ084V1DG21 uses a Parallel RGB signal interface with a 1-channel, 6-bit configuration and a 31-pin connector. The available technical documentation identifies the input signal as 6-bit digital RGB.

The panel is specified for a typical VCC supply of 3.3V/5.0V on the supplied product listing. This should be carefully verified against the equipment's LCD interface before installation.

A 31-pin connector by itself does not guarantee compatibility. The complete pinout, RGB signal configuration, power requirements, timing, connector orientation, and controller electronics must be checked before replacing an existing LCD.

This is especially important for legacy equipment, where two panels may have similar physical connectors but different electrical pin assignments.

Backlight

The LQ084V1DG21 uses a single CCFL backlight with a specified operating life of 50,000 hours. Available technical references identify the module as using a CCFT/CCFL backlight.

The supplied product page specifies the backlight as one CCFL with 50,000-hour life and no separate driver specified.

Because CCFL systems require appropriate drive circuitry, the backlight connection should be verified before installation. When replacing a legacy LCD, confirm whether the existing equipment's inverter or backlight circuit is compatible with the replacement panel.

Do not assume that an LED-backlit replacement can be connected to the same backlight circuit as a CCFL panel without appropriate electrical and mechanical modifications.

Mechanical Dimensions

The LQ084V1DG21 has an active display area of 170.88 × 129.6 mm. Its listed outline dimensions are approximately 216 × 152.4 × 12.5 mm. Other technical references list a nominal depth of approximately 12.0 mm.

The panel weight is approximately 410 g according to available technical documentation.

These mechanical dimensions are important when fitting the panel into an existing industrial enclosure. The outer dimensions, thickness, mounting points, connector position, bezel area, and cable clearance should be compared with the original display.

A different 8.4-inch LCD may have the same diagonal size but still fail to fit because of differences in mounting dimensions or overall thickness.

Operating Temperature

The supplied product listing specifies an operating temperature range of -25°C to 70°C and a storage temperature range of 0°C to 60°C.

However, other technical documentation for the LQ084V1DG21 reports 0°C to +55°C operating temperature and -25°C to +70°C storage temperature.

Because these specifications differ between available references, temperature-sensitive installations should verify the original Sharp documentation and the specifications applicable to the particular panel before deployment.

Industrial Applications

The Sharp LQ084V1DG21 is suited to legacy and industrial equipment that requires an 8.4-inch VGA TFT display with a Parallel RGB interface. Its compact size, traditional 4:3 format, and CCFL backlight make it relevant to equipment designed around earlier-generation LCD technology.

Potential applications include:

·        Industrial PCs

·        HMI systems

·        CNC machine interfaces

·        Industrial control equipment

·        Machine control panels

·        Industrial automation systems

·        Measurement and instrumentation equipment

·        Banking and terminal equipment

·        Monitoring systems

·        Embedded control equipment

·        Medical equipment using compatible display electronics

·        Legacy industrial machinery requiring an 8.4-inch VGA LCD replacement

Actual compatibility depends on the electrical and mechanical requirements of the target equipment.

Compatibility and Replacement Note

The Sharp LQ084V1DG21 is a legacy LCD module, and replacement should be based on a complete specification comparison rather than screen size alone.

Before purchasing or installing this panel, verify:

·        Exact original LCD model and suffix

·        Display size

·        640 × 480 resolution

·        Active display area

·        Overall dimensions

·        Panel thickness

·        Mounting points and mounting method

·        Connector type and connector position

·        31-pin connector configuration

·        Complete connector pinout

·        Parallel RGB interface

·        1-channel, 6-bit signal configuration

·        LCD supply voltage

·        Backlight type

·        CCFL requirements

·        Backlight drive/inverter compatibility

·        Display timing requirements

·        Controller compatibility

·        Operating temperature requirements

·        Mechanical clearance inside the equipment

The fact that another panel has the same 8.4-inch size, VGA resolution, or 31-pin connector does not automatically make it a direct replacement.

The LQ084V1DG21 was also discontinued by Sharp, with Sharp's discontinuation documentation identifying the LQ084V1DG41 as its replacement. This does not mean that every LQ084V1DG41 installation can be treated as interchangeable without verification, so the equipment's electrical and mechanical requirements should still be checked.

For a legacy replacement, the safest approach is to compare the model number printed on the existing LCD with the LQ084V1DG21 and verify the complete datasheet specifications before ordering.

Product Details

Product: Sharp LQ084V1DG21 LCD Module
Brand: Sharp
Model: LQ084V1DG21
Display Size: 8.4 inches
Resolution: 640 × 480 pixels, VGA
Panel Type: a-Si TFT-LCD, LCM
Display Type: TFT-LCD
Display Mode: TN, Normally White, Transmissive
Interface: Parallel RGB, 1 channel, 6-bit
Connector: 31-pin
Brightness: 300 cd/m² typical
Contrast Ratio: 250:1 typical
Supply Voltage: 3.3V/5.0V typical VCC
Backlight: 1 × CCFL
Backlight Life: 50,000 hours
Operating Temperature: -25°C to 70°C as listed on supplied product page
Storage Temperature: 0°C to 60°C as listed on supplied product page
Touch Screen: No touchscreen specified
Condition: Refurbished
Warranty: Not specified

Handling and Installation Precautions

The LQ084V1DG21 contains delicate LCD glass and a front polarizer that can be damaged through pressure, scratches, moisture, or improper handling.

·        Avoid applying pressure directly to the LCD glass.

·        Do not scratch the front polarizer.

·        Keep sharp tools and hard objects away from the display surface.

·        Power off the equipment before inserting or disconnecting the signal connector.

·        Handle the 31-pin interface connector carefully.

·        Do not rotate or tilt the connector while inserting or removing it.

·        Verify the connector pinout before applying power.

·        Confirm the required LCD supply voltage before installation.

·        Use the appropriate CCFL backlight circuitry.

·        Follow ESD precautions when handling the module.

·        Protect the LCD from moisture and immediately wipe away water drops.

·        Avoid dropping, bending, or striking the panel against hard surfaces.

·        Do not open or modify the LCD module assembly.

·        Allow sufficient clearance around the panel and its cables during installation.

·        Confirm the operating environment is suitable for the panel before deployment.

Frequently Asked Questions

What is the Sharp LQ084V1DG21?

The Sharp LQ084V1DG21 is an 8.4-inch a-Si TFT-LCD module with a 640 × 480 VGA resolution, TN Normally White display mode, Parallel RGB interface, and CCFL backlight.

What is the resolution of the LQ084V1DG21?

The LQ084V1DG21 has a 640 × 480 pixel VGA resolution. It uses a traditional 4:3 display format.

What is the screen size?

The Sharp LQ084V1DG21 has an 8.4-inch diagonal display.

What type of display is the LQ084V1DG21?

It is an a-Si TFT-LCD module using TN, Normally White, Transmissive display technology.

What is the brightness of the LQ084V1DG21?

The specified typical luminance is 300 cd/m².

What is the contrast ratio?

The typical contrast ratio is 250:1.

What interface does the LQ084V1DG21 use?

The panel uses a Parallel RGB interface with a 1-channel, 6-bit digital RGB configuration.

How many pins does the LQ084V1DG21 have?

The LQ084V1DG21 uses a 31-pin connector. However, the pin count alone does not establish compatibility. The complete pin assignment and electrical interface must be verified.

What type of backlight does the LQ084V1DG21 use?

The panel uses one CCFL backlight with a specified life of 50,000 hours.

Does the LQ084V1DG21 have a touchscreen?

No touchscreen is specified for this LCD module. It is a display module rather than an integrated touchscreen assembly.

What are the dimensions of the LQ084V1DG21?

The active area is approximately 170.88 × 129.6 mm, while the listed outline dimensions are approximately 216 × 152.4 × 12.5 mm.

Can the LQ084V1DG21 be used as a replacement LCD?

Yes, it can be considered for compatible legacy equipment requiring this type of 8.4-inch VGA TFT-LCD. Before installation, verify the exact model, dimensions, mounting, connector pinout, Parallel RGB interface, supply voltage, CCFL backlight requirements, and controller compatibility. A similar size or connector does not automatically guarantee direct compatibility.