The maximum projectable 300-inch screen size provides a close-to-the-movie-like look and feel, while the projector's price/performance ratio is significantly higher compared to large-screen TVs.
Ricoh PJHD900 Home Projector
In recent years, home projectors have become more and more widely accepted by a large number of home users, and their high resolution, high brightness, and colorful picture display all meet the stringent requirements of home users for home projectors. As a Fortune 500 company, Ricoh projectors have outstanding performance in the home projector market. The newly launched home projector PJHD900 is designed for home theater. Here we look at the details of this machine.
190W high pressure ** lamp
The Ricoh PJHD900 is equipped with a 190W high-voltage ** lamp, which can be used in normal mode for 5,000 hours and has an energy-saving mode of up to 6000 hours of life.
Key section
What home projector users care most about is the image quality projected by the projector. The Ricoh PJHD900 is a home projector that Ricoh strives to build today. It uses DLP projection technology with a brightness of up to 3300 lumens and a super high contrast ratio of 25,000:1. At the same time, the Ricoh PJHD900 enjoys 1920x1080 Full HD resolution. High-definition picture quality to meet the needs of home users.
This is considered to be a relatively high level in the home entry machine, because the general home machine is also about 2,000 lumens, which means that its resistance to environmental light is greatly enhanced. The actual test also found that the Ricoh PJHD900 has much brighter picture than the average machine when it turns on multiple indoor lights.
No indoor lighting screen photo
Open indoor 2 fluorescent screen photo
When a home user purchases a projector, be careful not to choose a product with a smaller throw ratio than a smaller value. The smaller the value, the greater the distortion of the screen. If your home environment is large enough, choose a normal focal length, that is, a product with a throw ratio of 1.5-1.9. If your space is not large enough, choose a projector with a throw ratio of 0.6-1.
Ricoh PJHD900 throw distance
Ricoh PJHD900 projection ratio between 1.48-1.62, can project 30-300-inch projection screen, users can choose according to their own home environment, fully able to meet the needs of the display in most home environments.
Theater mode
In order to ensure home users can enjoy better and more perfect projection quality, Ricoh PJHD900 uses Ricoh NCE natural color enhancement technology. Ricoh NCE natural color enhancement technology is the core power of vivid and realistic images of projectors. Through the optimization and enhancement of performance, the dynamic contrast is greatly improved, and the richness of the types of color palette is used in the three types of red/green/blue. In addition to the original colors, yellow, red and cyan are added to create natural and vivid colors and crystal clear high-definition images, creating a true and more gorgeous visual effect.
From the picture, the color saturation is increased through the enhancement processing of the middle tone, so that the picture color is more realistic and more vivid. The snacks in the picture above are bright but not oversaturated. The green color transition is natural, and there is a clear distinction between green and dark green.
Watch the football game effect
In addition, the projector is different from the liquid crystal television. The latter is subject to the deflection speed of the liquid crystal molecules and is not ideal in representing a dynamic scene. For example, high-speed sports football tends to cause tailing. The dynamic performance of the Ricoh PJHD900 is excellent, and the trajectory of the football is very clear. This is difficult to see on LCD TVs.
Interface section
In terms of interfaces, the Ricoh PJHD900 uses MHL's mobile high-definition interface. Users can connect MHL-enabled mobile devices to enjoy high-definition video and audio effects through MHL cables. Users can enjoy games, photos, movies, or other applications on mobile phones, tablets, and the like on the big screen.
In terms of noise, the noise value of the Ricoh PJHD900 measured at a distance of less than half a meter from the projector in a room with an ambient noise level of 30 dB was about 41.3 dB. Many people may not have a concept of noise in life. In previous evaluations, we have repeatedly mentioned that normal office environment noise is 50 dB, and the sound of pouring water is 40 dB. Therefore, the noise performance of Ricoh PJHD900 is in normal use. Can be ignored.
On the fever side, after playing a 1080P video for an hour and a half, the body temperature was only about 22.4°C, and it hardly felt heat.
to sum up:
Ricoh's PJHD900 home projector, the high-definition picture quality experience, allows home users to experience new visual effects, and its practical features make home projection easier and smarter.
As a home-use entry-level projector, it gives a sincere 3300 lumens brightness, coupled with a curtain with a gain effect, can effectively fight against ambient light, at home without deliberately pulling the curtains, so that the use of the scene more comfortable. Coupled with solid color tuning, convenient installation adjustments and outstanding energy management, the Ricoh PJHD9000 can be said to be easy to use.
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Rectangular I/O Connectors
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I/O Connectors General Specifications
ELECTRICAL CHARACTERISTICS
Contact Current Rating:5Amperes.
Dielectric Withstanding.
Dielectric Withstanding Voltage:AC 1000Vr.m.s.
Insulation Resistance:500 Megohms Minimum at DC500V.
Contact Resistance:25 Milliohms Maximum.
Operating Temperature:-55℃~105℃.
MATERIALS:
Contacts:Brass.
Insulator:PBT,UL94V-O Rated.
Shell:Cold Rolle Steel.
Metal Watertight Frame:PBT,UL94V-0.
O-Ring:Silicone.
NOTE:
Position:09PIN,15PIN,25PIN,37PIN.
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