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DynaScan DS491LT4 – 49" 3,500 nits High Brightness LCD Public Display Monitor

The DS491LT4 is a 49 inch 3500 cd/m² high brightness professional IPS LCD monitor with a full LED back light and local dimming producing incredible, vivid, high contrast images.


Size 49 inch
Contrast 3000:1
Power Consumption [W] 160 (Avg.)
Aspect Ratio 16:9
Panel Technology IPS
Brightness [cd/m²] 3500
Resolution 1920 x 1080
Cooling System Passive

The DS491LT4 is a full HD 49-inch high brightness LCD featuring an LED backlight producing a 3,500 nit sunlight visible image. The DS491LT4 has been designed for applications in bright environments such as outdoor enclosures and storefront windows. A narrow 8.5 mm bezel makes this model ideal for either single display or video wall applications. Each screen is individually colour calibrated to the D65 colour standard to ensure uniformity among multiple displays. The DS4941LT4 features an integrated Android™ based media player with WiFi offering users a complete media platform, allowing playback of local files and USB/SD card media.

Key Features:

    • Sunlight readable 3,500 cd/m² brightness
    • LED backlit with local dimming
    • Narrow 8.5 mm bezel for video wall applications
    • 1,000,000:1 dynamic contrast ratio
    • 1080p HD resolution
    • Blackening defect free in direct sunlight
    • Thermal management system

High Brightness LED Backlit with Local Dimming

LED back lighting is both more energy efficient and provides a much brighter image than traditional CCFL backlights. Due to the compact nature of LEDs, displays are also typically thinner. DynaScan’s DS² line of LCDs utilize a proprietary system of LED backlighting which is not only more energy efficient than traditional CCFL backlights, it is also considerably brighter. DynaScan has applied its LED expertise to create a collection of ultra-high brightness LCDs which can easily be viewed in direct sunlight such as store front windows or outdoor enclosures. The display features a local dimming LED back light technique for a remarkably high contrast picture as high as 1,000,000:1 (dynamic).

With direct local dimming, darker areas of an image receive less backlighting than

lighter areas, as opposed to CCFL and edge-lit LED backlights which illuminate an entire screen at all times causing blacks and dark areas to appear washed out.

Colour Temperature and Quality

The DS491LT4 comes equipped to display both D55 (5500 K) and D65 (6500 K) CIE colour standards right out of the box – a feature lacking from many of the large format commercial LCDs currently on the market. As many displays have a tendency to be rather cool or “bluish”, these colour settings produce a very natural looking image which has a correlated colour temperature to that of daylight.

Narrow Bezel for Video Wall Applications

The DS491LT4 features a 8.5 mm narrow bezel display – perfect for video wall applications. With built-in video daisy chaining, a single 1080p source can be used on video walls up to 15×15 in size without the need for any additional external video wall controller. By combining a narrow bezel display with the benefits of a high brightness LED back light, these displays are ideal for indoor environments that receive a high amount of external daylight such as airports, shopping centres and store front window displays.

Blackening Defect Free LCD Panel

Most residential and commercial screens will blacken or result in isotropic failure when the LCD panel overheats.  The DS491LT4 is equipped with a high temperature LCD panel capable of withstanding temperatures up to 110˚C (230°F) without blackening – crucial for direct sunlight applications.

Full HD Resolution

With a resolution of 1920 x 1080 Full HD, the DS491LT4 provides a super sharp image for easy to read text and incredible detail

Auto Brightness Control

Different external lighting conditions require different brightness levels. An on-board light sensor measures the ambient light in the area and automatically adjusts the image accordingly.

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LCD Panel Type 48.5 inches colour TFT LCD
Native Resolution 1920 x 1080
Brightness 3500 nit (typ.)
Contrast Ratio 3,000:1 (static)
Response Time 8 ms (typ)
Colour Depth 10 bit
Viewing Angle 178° / 178°
Blackening Defect Free Up to 110°C (230°F)
Light Life Time 100,000 hrs (typ.)
Panel Surface AR, Haze <2%, 2H
Power Supply Internal
Rated Voltage 100 V ~ 240 V, 50 Hz / 60 Hz
Power On Mode 160 W (typ), 230 W (max)
Power Saving Mode < 1 W
Bezel Width (T/B/L/R) 8.5 / 8.5 / 8.5 / 8.5 mm
Cabinet Colour Black
Monitor Dimension (LxHxD, w/o stand) 1096.7 x 627.2 x 82.7 mm
Monitor Weight (set/package) 19.6 kg / 27 kg
VESA Mounting (dimension) 400 x 400 mm
Max Audio Output N/A
Image Setting Yes
Language English
Daisy Chain DVI, RS-232 Control
Sharpness Enhancement Yes
Proof of Image Retention Yes
Dimming Control (DCR) Yes
Built-in Video Wall Support Yes, up to 15 x 15
ID Setting for Daisy Chain Yes
On/Off Scheduling Yes
Ambient Light Sensor Yes
Total Turn-on time Yes
Portrait & Landscape Orientation Yes
Internal Temperature Sensor Yes
DVI-D In (x1), Out (x1)
HDMI In (x1)
DisplayPort In (x1)
RS-232 In (x1), Out (x1)
Audio Out (x1)
HDMI In (x1)
USB USB 2.0 for Internal Player
Processor ARM Cortex-A9 1.6 GHz, Quad-Core CPU
On chip cache memory L2: 512KB
Clock speed 1.6GHz
Main memory interface 1GB DDR3/3L (1600MHz)
Graphics 600M ARM Mali400MP4, 2D/3D graphic engine, support OpenGL ES1.1/2.0, Open
Storage (FDM) 8GB NAND Flash (2GB occupied by O/S, 6GB available depending on total capacity
Multimedia H.264 encoder/decoder, MPEG-1/2/4, H.263, H.264 MVC, AVS, VC-1, VP8/6, RV
IO ports USB 2.0, SD slot
Operating system Yes
Remote Control Yes
Users Guide / Driver CD-ROM Yes
Power Cable Yes
Operating Temperature 0° C ~ 45° C
Storage Temperature -20° C ~ 60° C
Humidity 10% ~ 80% RH Non-condensing
All specifications subject to change without notice.

DynaScan DS491LT4 Monitor – Dimensions

DynaScan DS491LT4 High Brightness LCD Monitor - Dimensions