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BenQ MX631ST
Big Pictures in Small Spaces

BenQ MX631ST

MX631ST 3D Ready DLP Projector

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Designed to deliver crisp, bright, larger-than-life images from a short projection distance, the BenQ MX631ST is ideal for use in places where space is at a premium such as small conference rooms, training rooms and classrooms. With a powerful 3200 ANSI lumens bright image and an impressive 13000:1 contrast ratio, razor sharp image and rich, accurate colors, the MX631ST will help you present your best.

Key Features

  • Native XGA (1024x768) Resolution
  • 3,200 ANSI Lumens, 13,000:1 Contrast Ratio
  • 0.9 Short Throw Lens Design
  • Up to 10,000 Hours Long Lamp Life
  • HDMI x 2, MHL
  • 10W Speaker

BenQ MX631ST


The Good Things that Come in Short Distances

Minimum Space Constraints

Minimum Space Constraints

Imagine the freedom of having the same large size image from just half the traditionally required throw distance! Having increased placement flexibility and more efficient use of available space. That's the magic of short-throw!

Zero Eye-Blinding Lights

Zero Eye-Blinding Lights

The short-throw projection distance keeps the projector light from shinning directly into your eyes, allowing you to keep your focus on your audience.

Zero Disruptions

Zero Disruptions

With a projection distance this close, you will be able to move freely, without casting distracting shadows on the screen!

Brilliant Image Performance

High Contrast

High contrast ratio adds depth to an image and is essential to provide crisp image detail. The high contrast ratio in the MX631ST helps produce images with stunning clarity and fine detail for sharper, easier to read text, graphics and video for more memorable presentations.

Low Contrast
Low Contrast

High Contrast
High Contrast

High Brightness

The high brightness of the BenQ MX631ST helps overcome most ambient light conditions to ensure your message will be seen clearly, even with the lights on.

2 HDMI Ports

Rich Connectivity

2 HDMI Ports

Compatible with today’s digital sources, the MX631ST provides Dual HDMI ports to satisfy your digital connectivity needs as well as dual VGA ports for traditional analog sources.

Plug 'N Play, Enjoy Big Screen Fun from Your Android Devices

Plug 'N Play, Enjoy Big Screen Fun from Your Android Devices

You can now share content from your favorite MHL enabled devices on the big screen. The MHL functionality in the MX631ST allows you to display pictures, movies and games from MHL enabled Android devices to the big screen.

1.5A USB Type-A Power Supply

1.5A USB Type-A Power Supply

Powering your peripheral devices such as Chromecast or Roku stick is easier than ever with the built-in power enabled USB port, providing up to 1.5 Amps of power to eliminate the need for external power connections.

Ease of Use

2D keystone correction provides the ability to correct vertical and horizontal keystone errors when the projector is placed off center form the screen. Ideal for use during quick setup table top presentations.

Ease of Use

Built-in speakers

Built-in speakers

Powerful Built-in 10W speaker provides ample amplification to ensure your message is clearly heard.

SmartEco™ Lamp Saving Technology

SmartEco™ Lamp Saving Technology - Normal Mode
Normal Mode
296W Projector Power
Consumption by Average

SmartEco™ Lamp Saving Technology - SmartEco Mode
SmartEco Mode
Enhanced Details in Darkened Scenes
163W Projector Power Consumption by Average

(Source: 2010 Philips white paper)

Incorporating BenQ’s renowned SmartEco lamp saving Technology, the MX631ST not only offers greater energy savings, but continues to deliver amazing picture quality through this innovative technology. SmartEco mode is designed to use only the exact amount of lamp power a projector needs to deliver the best contrast and brightness performance. This feature enables the MX631ST to deliver uncompromised projection quality with the added benefit of reduced the total cost of ownership by extending the lamp life and lowering power consumption.

SmartEco Lamp

SmartEco Lamp

Within the SmartEco Lamp Saving Technology umbrella, Lamp Care mode takes your dollars further – much further by offering an astonishing lamp life of up to 10,000 hours!

Eco Blank Mode

The Eco Blank feature allows users to blank or mute the projected image on the screen, affording privacy to search for files or documents while the desktop is not projected to the entire audience. When activated, Eco Blank automatically dims lamp power, therefore lowering total power consumption by up to 70%.

Eco Blank Mode - Full Power On
Full Power On 100% Lamp Power
Attention on the Projection Screen

Eco Blank Mode - Eco Blank Mode On 30% Lamp
Eco Blank Mode On 30% Lamp
Power at the Lowest Attention on the Class Instructor

No Source Detected Mode

There will be times when a projector is turned on without a display source, such as a notebook or classroom PC connected. To avoid having a projector running at full lamp power, BenQ created the No Source Detected feature, which lowers the projector’s lamp brightness to 30 % after the projector has remained unconnected to a display source for more than three minutes.

Source Detected 100% Lamp Power
Source Detected 100% Lamp Power

No Source Detected 30% Lamp Power
No Source Detected 30% Lamp Power

0.5W in Standby Mode

When inactive, the MX631ST keeps power consumption down to a minimum of 0.5W power, further lowering your total cost of ownership.

Blu-ray® Full HD 3D Supported

Blu-ray® Full HD 3D Supported

BenQ MX631ST is built with latest DLPR technology to support Full 3D functionality, allowing users to create immersive viewing experiences. Setup is easy. All that is required are 3D glasses and 3D content from your 3D Blu-ray player.

Audio Pass Through

With the built-in speaker, the MX631ST can be used as an audio system when it's on the standby mode. This saves you the trouble as well as the extra budget for getting a separate audio system.

BenQ DLP® Projectors︱ Long-Lasting Image Perfection with DLP Technology

Timeless Image Quality:

Colorific™ Technology Delivers Lifelike Color, Year After Year

BenQ uses Colorific technology to optimize images for specific color balance effects for diverse applications such as presentations, movies and spreadsheets and photographs. Every BenQ Colorific projector generates more than one billion colors by combining up to seven different colors to create vibrant, true-to-life images. You will also experience dramatic contrasts for remarkable image clarity, higher visual impact and greater legibility. BenQ's Colorific projectors are dependable year after year. You can rely on the colors to remain the same from day one to a decade later--without the risk of fading, ghosted images, or yellowing.


Over 1 billion colors - compared to 16.7 million as on many LCD projectors


Bright, high contrast picture - 3x more contrast than similar top-selling LCD models


Consistent image quality - image is the same now and years from now

Non-DLP Projector

Non-DLP Projector

BenQ DLP Projector

BenQ DLP Projector

(All photos portraying projection scenarios are simulated.)

DLP Technology also includes a filter-free engine design for carefree confidence in long-lasting image quality and reduced TCO. BenQ’s SmartEco™ Technology further boosts contrast performance and image quality endurance while saving up to 70% on lamp power consumption.

ecoFACTS Label

ecoFACTS Label

ecoFACTS can tell you how eco-friendly BenQ products are!

Development of eco-friendly products, BenQ doesn't just want to comply with green regulations passively, but also to actively develop eco-friendly products!

ecoFACTS declares BenQ's greatest efforts on the replacement of hazardous substances, material selection, packaging design, energy-saving design and other aspects of the products.


MX631ST Specs

BenQ MX631ST Specifications
Projection System DLP
Native Resolution XGA (1024 x 768)
Brightness* (ANSI Lumens) 3,200 ANSI Lumens
Contrast Ratio 13000:1
Display Color 1.07 Billion Colors
Lens F=2.6-2.78, f=10.2-12.24mm
Aspect Ratio Native 4:3 (5 aspect ratio selectable)
Clear Image Size/ Maximum Image Size 60"~120"
Throw Ratio 0.9~1.08 (78" @ 1.44m)
Image Size (Diagonal) 1.2:1
Lamp Mode (Normal/Economic/SmartEco/LampSave/LumenCare)* 4,500/ 6,000/ 6, 500/ 10,000 hours
Keystone Adjustment 1D, Auto Vertical +/- 30 degrees
Projection Offset 110% ±5%
Resolution Support VGA (640 x 480) to WUXGA_RB (1920 x 1200) * RB = Reduced Blanking
Horizontal Frequency 15KHz~102KHz
Vertical Scan Rate 23Hz~120Hz
Lamp Wattage 196W
Interface Computer In (D-sub 15pin)x 1 (Share with component)
Monitor Out (D-sub 15pin)x 1
Composite Video In (RCA)x 1
S-Video In (Mini DIN 4pin)x 1
HDMI x 2 (One share with MHL2.0)
Audio In (Mini Jack) x 1
Audio L/R In (RCA) x 1
Audio Out (Mini Jack) x 1
Speaker 10W x 1
USB (Type mini B) x 1 (Download & Page Up/ Down)
USB (Type A) x1 (1.5A Power Supply)
RS232 (DB-9pin) x 1
IR Receiver x 2 (Front + Top)
Dimensions (W x H x D mm) 287.3 x 114.4 x 232.6mm
HDTV Compatibility 480i, 480p, 576i, 576p, 720p, 1080i, 1080p
Video Compatibility NTSC, PAL, SECAM
3D Support and Compatibility PC: 120Hz Frame Sequential 3D for resolutions up to WXGA,
PC: 60Hz Top-bottom 3D for resolutions up to SXGA+
Video: 60Hz Frame Sequential 3D for resolutions up to 480i
Audible Noise (Normal/Economic Mode) 33/ 28 dBA (Normal/ Economic mode)
On-Screen Display Languages Arabic/ Bulgarian/ Croatian/ Czech/ Danish/ Dutch/ English/ Finnish/ French/ German/ Greek/ Hindi/ Hungarian/ Italian/ Indonesian/ Japanese/ Korean/ Norwegian/ Polish/ Portuguese/ Romanian/ Russian/ Simplified Chinese/ Spanish/ Swedish/ Turkish/ Thai/ Traditional Chinese (28 Languages)
Picture Modes ** Bright/ Presentation/ sRGB/ Cinema /(3D) / User 1/ User 2
Accessories (Standard) Remote Control w/ Battery
Power Cord (by region)
User Manual CD
Quick Start Guide
Warranty Card (by region)
VGA (D-sub 15pin) Cable
Accessories (Optional) Spare Lamp Kit: P/N: 5J.J9V05.001
Ceilling Mount: P/N: 5J.J4N10.001
Remote Control P/N: 5J.J9V06.001
3D Glasses: P/N: 5J.J9H25.001
Carry bag: P/N: 5J.J3T09.001
Power Supply AC100 to 240V, 50Hz to 60 Hz
Power Consumption Normal 305W, Eco 220W, Standby < 0.5W
Power Management Function Automatic power off after 20 minutes without a display source
Weight 2.6kg

Distance Chart:

MX631ST Distance Chart

Screen Size Distance from screen (mm / inch) Vertical offset (mm / inch)
Diagonal W mm / inch H mm / inch Min length Average Min length
Inch mm (Max zoom) (Max zoom)
40 1016 32 24 28.8 31.7 34.6 1.1
50 1270 40 30 36.1 39.7 43.3 1.4
60 1524 48 36 43.3 47.6 52.0 1.8
80 2032 64 48 57.7 63.5 69.3 2.4
100 2540 80 60 72.2 80.7 86.6 2.9
120 3048 96 72 86.6 95.3 104.0 3.5
150 3810 120 90 108.3 119.2 130 4.4
200 5080 160 120 144.4 158.9 173.3 5.9
220 5588 176 132 158.9 174.8 190.7 6.6
250 6350 200 150 180.5 198.6 216.7 7.5
300 7620 240 180 216.7 238.3 260.1 9.0

Ceiling Mount Chart:

MX631ST Ceiling Mount Chart

Units: inch


Download the BenQ MX631ST Data Sheet (PDF).

Pricing Notes:

BenQ Products
MX631ST 3D Ready DLP Projector
Get a Quote!