雷火电竞竞猜

Projection

The main benefits are

1. Relatively low cost

2. Wide range of sizes, brightness and resolutions available.

3. Flexible use – computer content, video, live TV, video conference

At Walton Smart Solutions, we work with some of the leading manufacturers such as Panasonic, Epson and NEC to allow us to select the right technology for you.

Factors to consider when choosing a projector are

Resolution

Brightness

Light Engine

1. Resolution – the type, shape and quality of the image is determined by resolution. Resolution is determined by how many pixels are used to make up an image.

XGA – This is 1024 x 768 pixels. This produces a 4:3 ratio image (square) and can be used with desk top PC's or analogue video equipment such as a DVD player. It is fairly inexpensive technology and produces a perfectly adequate image for programmes such as PowerPoint.

WXGA – This is 1280 x 800 pixels. This produces a 16:10 ratio (widescreen) image and is designed to work with laptops which usually have a "widescreen" display. It can also be used for PC's or analogue video equipment such as a DVD player. In some cases it can be used to display digital video equipment such as a Blu-ray player. It is fairly inexpensive technology and produces a perfectly adequate image for programmes such as PowerPoint.

WXGA – This is 1366 x 768 pixels. This produces a 16:9 ratio (widescreen) and is designed to work with analogue video equipment such as a DVD player. In some cases it can be used to display digital video equipment such as a Blu-ray player. It can also be used with PC's and laptops.

SXGA+ - This is 1400 x 1050 pixels. This produces a 4:3 ratio image (square) and can be used with desk top PC's or analogue video equipment such as a DVD player. It is used where a high resolution is required for more detailed graphics such as spread sheets or fine quality images.

HD – This is 1920 x 1080 pixels. This produces a 16:9 ratio (widescreen) and is designed to work specifically with digital video equipment such as a Blu-ray player. It can also be used with analogue video equipment such as a DVD player. It can also be used with High Definition PC's, laptops and tablets.

WUXGA - This is 1920 x 1200 pixels. This produces a 16:10 ratio (widescreen) image and is designed to work specifically with High Definition PC's and laptops. It can be used to display digital video equipment such as a Blu-ray player. It can also be used for analogue PC's, laptops and video equipment such as a DVD player. This is ideal when high quality graphic or video images are required.

2. Brightness – This is an important consideration to make when choosing a projector. Brightness is measured in lumens or ANSI lumens. In the majority of cases the brighter the projector the better. However, usually the brighter the projector the more expensive, so Walton Smart Solutions will consider your requirements before recommending the right projector for you. Walton Smart Solutions will look at the location, the size of the room/audience, the ambient light conditions, projection surface and application before providing you with the correct projector.

3. Light Engine – There are various types of light engine available. Walton Smart Solutions have the experience to select the correct one for you.

LCD – This stands for liquid crystal display. They use three LCD glass panels (red, green and blue) to create the image. Traditionally the LCD projector produces vivid colours and is better for graphical images such as from a PC.

DLP – This stands for digital light processing and is a proprietary technology developed by Texas Instruments. The DLP chip is a reflective surface made up of thousands of tiny mirrors. Each mirror represents a single pixel. Light from the projector's lamp is directed through a colour wheel (red, green, blue and white) onto the surface of the DLP chip. The mirrors move back and forth, directing light to create the image. Traditionally the DLP projector is smaller, produces a higher contrast and is better for video images such as from a Blu-ray player. There are single chip and three chip DLP projectors available. Ia a single chip DLP projector the chip deals with all three colour sources, whereas in a three chip projector, each chip deals with a separate colour.

LED – This stands for light emitting diode. This category is relatively new and uses a variety of technologies to produce a projected image. Which technology is employed depends largely on the manufacturer. Safe to say, the majority use an LED to produce the red and blue colours and a laser with a colour wheel to produce the green colour. Traditionally, these projectors do not have the colour range of either LCD or DLP, however their long life is a major advantage.

Ultra Short Throw - These projectors are becoming increasingly popular. These are projectors which have a very short projection distance (or throw distance). As a result they are installed immediately above or below a projection screen or interactive white board, usually on a wall. As a consequence any shadowing produced by the presenter standing in front of the projection surface is greatly minimised as well as the risk of the light source beaming into the presenters' eyes. These units provide a high brightness image with various resolutions available. They are ideal for a classroom or a small meeting room where no greater than 2000mm wide image is required or when used with an interactive whiteboard.

Short Throw – Although still popular, these projectors are gradually being replaced by the Ultra Short Throw projectors. They are still used when a short throw distance is required but when the environment dictates the projector must be installed on either the ceiling or a desk or projector trolley. Shadowing produced by the presenter standing in front of the projection surface is greatly minimised as well as the risk of the light source beaming into the presenters' eyes. These units provide a high brightness image with various resolutions available. They are ideal for a classroom or a small meeting room where no greater than 2000mm wide image is required or when used with an interactive whiteboard.

Portable – These projectors combine high light output with a small and light design. They can be used to move around from classroom to meeting room and can be used in a fixed installation. These units provide a high brightness image with various resolutions available. They are ideal for a classroom or a small meeting room where no greater than 2000mm wide image is required or when used with an interactive whiteboard.

Fixed Installation – These projectors are used in a fixed location. They are ideal for large classrooms, lecture theatres, large meeting or boardrooms. They usually have a minimum light output of 3,500 ANSI lumens and come in a range of resolutions.

Large Venue - These projectors are used for a variety of locations from theatres, auditoriums, conference centres and large outdoor applications. Usually around a minimum of 10,000 ANSI lumens, they come in a range of resolutions depending on the application.

Lamp Less – A relatively new technology, there are now a variety of so called "lamp-less" projectors on the market. Using a combination of LED's and lasers to produce the colour and light source, the solid state projector is becoming more popular. Manufacturers such as Panasonic and Casio offer up to 20,000 hours warranties on the light source.

 

Walton Smart Solutions are suppliers of all projector lamps and accessories at very competitive prices and can undertake projector maintenance services – please ask for pricing.

 

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