Optoma ML750e
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Specifications and features
Optoma ML750e Projector: Compact LED Projection
The Optoma ML750e is a 380-gram portable LED WXGA projector using DLP display technology developed by Texas Instruments. It delivers 700 lumens of brightness and an advertised 20,000-hour lifespan thanks to its LED light source, which does not require a traditional lamp. The device includes standalone playback features for projecting presentations and multimedia content without a computer, along with connectivity suited to a variety of uses.
A concentration of DLP technology in a pocket-sized format
The ML750e is built around a 0.45-inch DMD chip developed by Texas Instruments, the foundation of DLP (Digital Light Processing) technology that has made Optoma’s reputation. This technological approach stands out for its ability to produce high-contrast images with less visible pixel structure than competing technologies. The DMD chip contains millions of tilting micro-mirrors that reflect light to create the projected image. This design ensures remarkable sharpness, particularly noticeable on text and fine details in professional presentations.
The projector’s dimensions (105 x 106 x 39 mm) place it in the pico projector category, although Optoma prefers to call it ultra-compact. This miniaturization hasn’t compromised robustness: the molded plastic casing withstands frequent handling, while the supplied carry case protects the device during travel. The manual focus lens, protected by an attached rubber cap, allows precise adjustment of the projected image’s sharpness.
The LED light source represents a break from traditional projector lamps. Red, green, and blue light-emitting diodes produce stable, consistent light, eliminating the color shifts typical of aging mercury lamps. This technology enables near-instant power-up in under 15 seconds and immediate power-off with no cool-down phase.
LED image quality and optimized visual performance
The native WXGA resolution of 1280 x 800 pixels places the ML750e above basic VGA projectors. This 16:10 format is ideal for modern presentations while also handling 16:9 and 4:3 content thanks to multi-format compatibility. The rated contrast of 20,000:1 helps distinguish subtle nuances in dark areas, a benefit for videos and photographs.
The Helmholtz–Kohlrausch effect, a perceptual phenomenon associated with LED sources, enhances the sensation of brightness. The ML750e’s 700 lumens therefore appear brighter than an equivalent value on a conventional lamp-based projector. This psycho-visual characteristic stems from the spectral purity of LEDs, which more effectively stimulate the cones in the human retina. Colorimetry adheres to Rec. 709 standards, ensuring faithful color reproduction for high-definition content.
The projected image size ranges from 17 to 100 inches depending on distance, with a 1.5:1 throw ratio. At 2.58 meters from the wall, the device produces a 2-meter diagonal image. Vertical keystone correction of ±40 degrees compensates for geometric distortion when the projector isn’t perfectly perpendicular to the projection surface. This manual correction is performed via the on-screen menu, allowing you to obtain a rectangular image even in less-than-ideal installation conditions.
The 30 to 32 dB noise level remains unobtrusive, comparable to the ambient noise of a library. The side-vented fan cooling system maintains operating temperature without disrupting listening—an impressive balance for such a compact device.
Extensive connectivity and smart standalone playback
The HDMI 1.4a interface with MHL support is the heart of the ML750e’s modern connectivity. This dual function lets you connect standard sources (computers, game consoles, Blu-ray players) as well as MHL-compatible smartphones and tablets. The Mobile High-Definition Link protocol simultaneously transmits audio, video, and power over a single cable, turning your phone’s screen into a giant touch remote.
Optoma’s proprietary Universal I/O port, along with the supplied adapter cable, ensures compatibility with legacy VGA sources. This versatility protects your investment in existing equipment while paving the way for future technologies. The USB-A port and microSD card reader unlock standalone playback functions—the cornerstone of the ML750e’s independence.
The integrated Office Viewer natively decodes Microsoft Office formats (Word, Excel, PowerPoint) and Adobe PDF without prior conversion. This feature turns the projector into a standalone presentation station: simply copy your files to a USB drive or memory card, and the ML750e displays them directly. The 1.5 GB internal memory stores frequently used presentations, so you don’t need to carry external media.
The built-in media player supports popular video formats (MP4, AVI, MKV), images (JPEG, PNG), and audio files (MP3, AAC). This versatility enables multimodal presentations combining slides, videos, and background music. The 1-watt mono speaker, while limited in power, is sufficient for small meeting rooms or personal listening.
Documentation
French
Technical specifications
Highlights
- Ultra-compact and lightweight: fits in your hand
- Bright, long-lasting LED image quality
- Built-in Office viewer and media player
- Extensive connectivity: HDMI, MHL, USB, microSD
- Ideal for professionals on the go and portable home theater
Display and projection
- Technology: DLP
- Native resolution: WXGA (1,280 × 800)
- Brightness: 700 lumens (HK) / 450 ANSI
- Contrast: 20,000:1
- Supported formats: native 16:10, compatible with 4:3 and 16:9
- Image size: 43 cm to 254 cm (17” to 100”)
- Keystone correction: ±40° (vertical)
- Throw ratio: 1.5:1
- Projection distance: 0.55 m to 3.23 m
- Zoom: fixed
- LED lifetime: 20,000 h
- Cinema mode: 24 fps for film-accurate smoothness
Connectivity and compatibility
- HDMI 1.4a with MHL support
- USB-A port for media playback
- microSD slot
- Universal I/O port (VGA via adapter)
- Mobile compatibility: easy sharing from smartphone/tablet
- Built-in Office viewer and media player
- Audio: Built-in speaker: 1 W
Physical characteristics
- Dimensions: 105 × 106 × 39 mm
- Net weight: 0.38 kg
- Noise level: 30–32 dB
Power and consumption
- Power consumption: 45–65 W
- Standby consumption: 0.5 W
Box contents
- Optoma ML750e projector
- Carrying case
- Remote control with battery included
- Power cable
- Universal I/O cable
- User manual
Frequently Asked Questions
Can the ML750e replace a traditional conference room projector?
For groups of 4 to 6 people in a slightly darkened room, the ML750e provides satisfactory image quality. Its 700-lumen brightness suits small rooms but is insufficient for lecture halls or very bright environments. The absence of an optical zoom also limits placement flexibility compared to fixed professional models.
Which smartphones are compatible with MHL?
MHL compatibility depends on the specific smartphone model. Samsung supported this technology widely on its Galaxy S and Note models until around 2015. LG phones, Sony Xperia, and some HTC models also include MHL. Apple’s iPhones do not support MHL but can connect via a standard Lightning-to-HDMI adapter to the projector’s HDMI port.
How does Office document playback work without a computer?
The integrated Office Viewer decodes common Microsoft Office formats. Copy your PowerPoint, Word, or Excel files onto a USB drive or microSD card, insert the media into the projector, then navigate via the menu to select and display the document. Rendering respects the original layout, including embedded fonts and basic transitions for PowerPoint.
Can the ML750e be used outdoors?
Outdoor use is feasible at dusk or in shaded areas. Daylight ambient brightness overwhelms the projector’s 700 lumens, making the image hard to see. For nighttime outdoor screenings, plan for a proper projection surface and power supply, as the ML750e does not include a built-in battery.
- Eco-contribution included in the sale price.
- Manufacturer reference: 95.8UA02GC1E
