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PRODUCT OVERVIEW
BenQ TH685i 3,500 ANSI Lumens 1080p Full HD HDR Home Cinema & Gaming Projector:
Enjoy an immersive big-screen experience with the BenQ TH685i Full HD Home Cinema and Gaming Projector, designed for movie lovers, sports fans, and gamers who want stunning visuals at home. With native 1080p Full HD resolution, 3,500 ANSI lumens brightness, and a 10,000:1 contrast ratio, this DLP projector delivers sharp details, vibrant colors, and impressive picture clarity, even in well-lit rooms. HDR10 and HLG support enhance contrast and visual depth, while compatibility with 4K UHD input lets you enjoy supported high-resolution content downscaled to Full HD. With 95% Rec. 709 color coverage, your favorite movies, sports, and games look rich, realistic, and engaging.
Take your entertainment further with ultra-responsive gaming performance, featuring an impressive 8.3ms input lag at 1080p 120Hz for smoother gameplay and quicker reactions. The included QS01 Android TV dongle gives you access to streaming apps and thousands of entertainment options through Google Play, while the built-in 5W chamber speaker delivers clear, room-filling audio. Flexible installation is made easy with a 1.3x zoom, digital lens shift, and automatic vertical keystone correction. Whether you're enjoying a movie night, competing on your gaming console, watching live sports, or streaming your favorite shows, the BenQ TH685i projector brings an exciting cinematic experience to your home.
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🎬 Native 1080p Full HD Resolution: Enjoy sharp, detailed 1920 × 1080 visuals for movies, sports, and gaming. ☀️ 3,500 ANSI Lumens Brightness: Experience bright, vibrant images in living rooms and other well-lit spaces. 🎮 Ultra-Low 8.3ms Input Lag: React faster in compatible games with low input lag at 1080p 120Hz. ⚡ Smooth 120Hz Gaming: Enjoy responsive gameplay with support for 1080p at 120Hz. ✨ HDR10, HLG & 4K Input Compatibility: Experience enhanced picture depth with HDR support and compatible 4K input downscaled to 1080p. |
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📺 Android TV Streaming Entertainment: Access supported streaming services and thousands of apps using the included QS01 Android TV dongle. 🌈 95% Rec. 709 Color Coverage: Enjoy natural-looking colors and lifelike visuals across movies, games, and sports. 🔊 Built-In 5W Chamber Speaker: Enjoy convenient onboard audio for everyday viewing without requiring an external speaker. 🎯 Flexible 1.3x Zoom & Digital Lens Shift: Adjust the projected image to suit your room layout and installation position. 📐 Auto Vertical Keystone Correction: Automatically correct vertical image distortion for a more evenly aligned picture. |
🎬 Native 1080p Full HD Resolution: Enjoy sharp, detailed 1920 × 1080 visuals for movies, sports, and gaming.
☀️ 3,500 ANSI Lumens Brightness: Experience bright, vibrant images in living rooms and other well-lit spaces.
🎮 Ultra-Low 8.3ms Input Lag: React faster in compatible games with low input lag at 1080p 120Hz.
⚡ Smooth 120Hz Gaming: Enjoy responsive gameplay with support for 1080p at 120Hz.
✨ HDR10, HLG & 4K Input Compatibility: Experience enhanced picture depth with HDR support and compatible 4K input downscaled to 1080p.
📺 Android TV Streaming Entertainment: Access supported streaming services and thousands of apps using the included QS01 Android TV dongle.
🌈 95% Rec. 709 Color Coverage: Enjoy natural-looking colors and lifelike visuals across movies, games, and sports.
🔊 Built-In 5W Chamber Speaker: Enjoy convenient onboard audio for everyday viewing without requiring an external speaker.
🎯 Flexible 1.3x Zoom & Digital Lens Shift: Adjust the projected image to suit your room layout and installation position.
📐 Auto Vertical Keystone Correction: Automatically correct vertical image distortion for a more evenly aligned picture.
| Brand Name | BenQ |
| Model Number | TH685i |
| Product Type | Home Cinema & Gaming Projector |
| Projection Technology | DLP |
| Native Resolution | Full HD 1080p (1920 × 1080) |
| Brightness | 3,500 ANSI Lumens |
| Contrast Ratio (FOFO) | 10,000:1 |
| Native Aspect Ratio | 16:9 |
| Display Colors | 30-bit, approximately 1.07 billion colors |
| Light Source | Lamp |
| Lamp Life – Normal | 4,000 hours |
| Lamp Life – Eco | 10,000 hours |
| Lamp Life – SmartEco | 8,000 hours |
| Lamp Life – LampSave | 15,000 hours |
| HDR Support | HDR10 and HLG |
| 4K Compatibility | Accepts compatible 4K UHD input; displays at 1080p |
| Rec. 709 Color Coverage | 95% |
| Throw Ratio | 1.127–1.46 |
| Zoom Ratio | 1.3x |
| Lens | F/# 1.94–2.07; focal length 11.9–15.5 mm |
| Projection Offset | 105% |
| Keystone Correction | Automatic vertical, ±40° |
| Input Lag | 8.3ms at 1080p/120Hz; 16.7ms at 1080p/60Hz; 33.4ms at 4K/60Hz input downscaled to 1080p |
| Supported Input Resolution | VGA (640 × 480) to 4K UHD (3840 × 2160) |
| Picture Modes | 3D, Bright, Cinema, Game, HDR, HLG, Living Room, Sports, User 1, User 2 |
| HDMI Inputs | 2 × HDMI 2.0b / HDCP 2.2 |
| PC Input | 1 × D-sub 15-pin (shared with component video) |
| USB Port | 1 × USB Type-A 2.0, 1.5A power supply |
| Serial Interface | 1 × RS-232 (DB-9) |
| Audio Input | 1 × 3.5mm mini jack |
| Audio Output | 1 × 3.5mm mini jack |
| HDMI Audio Return | ARC, 5.1-channel support |
| Built-In Speaker | 5W chamber speaker |
| Smart TV Accessory | QS01 Android TV dongle, included |
| Operating Temperature | 0°C to 40°C |
| Power Supply | AC 100–240V, 50/60Hz |
| Typical Power Consumption | 297W at 110V |
| Standby Power Consumption | Less than 0.5W |
| Acoustic Noise | 35dB (Normal); 29dB (Eco) |
| Product Dimensions (W × H × D) | 312 × 110 × 225 mm |
| Net Weight | 2.79 kg |
| Included Accessories | Android TV dongle, remote control with batteries, regional power cord, quick start guide, warranty card |
| Optional Accessories | Carry bag; universal ceiling mount (CM00G3) |
For detailed product specifications, please download the PDF Datasheet.