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LCD Televisions
Buying an LCD Television
An Introduction to LCD TV
LCD televisions offer two major advantages. Firstly they are easier to the eye than a conventional CRT (cathode ray tube) set, with brighter displays, improved contrast and not flicker. Secondly, they have a higher inherent resolution than plasma TVs of similar size and are thus ideal for high definition TV (HDTV). So how does it work? The technology is quite complex and is constantly improving. It uses the fact that liquid crystals are, by default, in a twisted state. Applying electric current to them allows them to admit light through. In basic terms, a light source shines through a liquid containing these crystals which is contained between two polarised screens. Applying the correct current to the relevant parts of the display creates the desired picture.
Key Features and Points to Consider
- Refresh Rate
- This is also referred to as the 'frequency rate' - the number of times the picture is updated per second. Most conventional CRT TVs operate at 50Hz with some people observing flickering. LCD TVs run at a higher rate, giving a clearer picture.
- Aspect Ratios
- Until widescreen high-definition TV becomes the standard, many programmes will still be broadcast in the traditional 4:3 aspect ratio. Most LCD TVs are built to operate in 16:9 (widescreen) format although 4:3 is still commonly found. When given a 4:3 picture, an LCD TV will adjust the picture to fit the screen by stretching or zooming the image.
- Screen Size
- More pixels means more transistors (three per pixel) and colours can appear slightly faded in larger models. LCD TVs have therefore traditionally been at the smaller end of the scale, in the range 14 to 19 inches. The technology continues to improve and many models over 30 inches are emerging although 40 inches plus is still rare.
- Depth
- A major benefit of LCD TVs is the physical depth of the set. Most are less than 3 inches deep and can be hung on a wall or suspended from the ceiling.
- Active or Passive Matrix
- LCD TVs at the lower end of the budget scale tend to use a passive matrix system. This has a conductor grid with pixels located at each intersection. Current is sent across two conductors on the grid to control the light for any pixel. The tends to result in a slower response time and less precise, with less contrast, some ghosting and blur. Active matrix sets, also referred to as thin film transistor (TFT) sets, are more expensive because they target electrical charges at specific pixels. This improves the screen refresh time, contrast and clarity.
- Other Uses
- LCD TVs are well suited to for use as a computer screen, with sharp display of text and graphics. Accordingly, LCD sets often include connections for composite, S-video, component video and one or more RGB SCART inputs.
- Integrated tuners
- Higher end models tend to include integrated digital TV receivers (IDTV) and speakers, reducing the number of boxes and connections needed in the system.
- Power consumption
- Another key advantage of LCD technology is lower power consumption. This is particularly beneficial with larger screen sizes. LCD screens consume up to 30% less power than their plasma equivalents.
- Resolution and Picture Quality
- Most people assume that a higher resolution means a better picture. Not true. VGA quality is found on most standard TVs. But LCD TVs may also have XGA (1024x768 pixels) or, the widescreen versions may offer W-XGA (1280x768 pixels). As we have seen above, there are a good many factors that affect picture quality. Check the picture itself. How realistic are flesh tones? How good is the contrast in dark scenes? How well is fast motion displayed?
LG 47LH3000 LCD Television
Quickfind: 01329228
£729.75
(Inc. Delivery & VAT)
Delivery: Out of Stock
Warranties: 3yr £169.95 & 5yr £219.95
| Features |
| Screen Size in Inches: 47 | Screen Size in cm: 119 | HD ready: Yes |
| Full HD 1080p: Yes | Built in Freeview: DVB-T (MPEG4) | Horizontal Resolution: 1920 |
| Type of Screen: LCD | Built in DVD Player/Recorder: No | Loudspeakers: Yes |
| Built in Cable: DVB-C (MPEG4) | Built in Satellite: No | Electronic Program Guide (EPG): Yes |
| Screen Format: 16:9 | Vertical Resolution: 1080 | Contrast Ratio: 80000 |
| Brightness: 500 | Reflection Angle: 178 | Frequency: 50 Hertz |
| Response Time in ms: 5 | DVI Interface: No | HDMI Interface: Yes |
| YUV Interface: Yes | USB: No | Number of Scart Interfaces: 2 |
| VESA Norm: VESA 200 x 200 | LED Backlight: No | HDTV: Yes |
| Power Consumption Standby in Watts: 0.9 | Power Consumption in Watts: 280 | Number of HDMI Inputs: 3 |
| Weight in kg: 19.7 | Depth in cm: 9.9 | Height in cm: 72.29 |
| Width in cm: 114.06 | Front AV Interface: Yes | Headphone Output: Yes |
| S-Video Interface: No | VGA / D-Sub Interface: Yes | RMS Wattage: 20 |
| Picture and Picture (PAP): No | Picture and Text (PAT): Yes | Picture in Picture (PIP): No |
Samsung UE46B7020WW LCD Television
Quickfind: 01789034
£1469.99
(Inc. Delivery & VAT)
Delivery: Out of Stock
Warranties: 3yr £239.95 & 5yr £319.95
| Features |
| Screen Size in Inches: 46 | Screen Size in cm: 117 | HD ready: Yes |
| Full HD 1080p: Yes | Built in Freeview: DVB-T (MPEG4) | Horizontal Resolution: 1920 |
| Type of Screen: LED | Built in DVD Player/Recorder: No | Loudspeakers: Yes |
| Built in Cable: DVB-C (MPEG4) | Built in Satellite: No | Electronic Program Guide (EPG): Yes |
| Screen Format: 16:9 | Vertical Resolution: 1080 | Frequency: 100 Hertz |
| DVI Interface: Yes | HDMI Interface: Yes | YUV Interface: Yes |
| USB: Yes | Number of Scart Interfaces: 1 | VESA Norm: VESA 400 x 400 |
| LED Backlight: Yes | HDTV: Yes | Power Consumption Standby in Watts: 0.1 |
| Power Consumption in Watts: 170 | Number of HDMI Inputs: 4 | Weight in kg: 17.7 |
| Depth in cm: 2.99 | Height in cm: 70.5 | Width in cm: 112.9 |
| Front AV Interface: No | VGA / D-Sub Interface: Yes | RMS Wattage: 20 |
| Picture in Picture (PIP): 1 Tuner PIP | | |
Sony KDL40W5500U LCD Television
Quickfind: 01819153
£781.50
(Inc. Delivery & VAT)
Delivery: In Stock ( 2 - 5 Working Days )
Warranties: 3yr £174.95 & 5yr £224.95
| Features |
| Screen Size in Inches: 40 | Screen Size in cm: 102 | HD ready: Yes |
| Full HD 1080p: Yes | Built in Freeview: DVB-T (MPEG4) | Horizontal Resolution: 1920 |
| Type of Screen: LCD | Built in DVD Player/Recorder: No | Loudspeakers: Yes |
| Built in Cable: DVB-C (MPEG4) | Built in Satellite: No | Electronic Program Guide (EPG): GUIDE Plus+ |
| Screen Format: 16:9 | Vertical Resolution: 1080 | Contrast Ratio: 100000 |
| Reflection Angle: 178 | Frequency: 100 Hertz | Response Time in ms: 8 |
| DVI Interface: No | HDMI Interface: Yes | YUV Interface: Yes |
| USB: Yes | Number of Scart Interfaces: 1 | VESA Norm: VESA 300 x 300 |
| Energy Saving Trust Feature: Yes | LED Backlight: No | HDTV: Yes |
| Power Consumption Standby in Watts: 0.17 | Power Consumption in Watts: 131 | Number of HDMI Inputs: 4 |
| Weight in kg: 18 | Depth in cm: 9.3 | Height in cm: 63.8 |
| Width in cm: 98.7 | Front AV Interface: Yes | Headphone Output: Yes |
| S-Video Interface: Yes | VGA / D-Sub Interface: Yes | RMS Wattage: 20 |
| Picture and Picture (PAP): Yes | Picture and Text (PAT): No | Picture in Picture (PIP): 1 Tuner PIP |
Further Information
LCD Screen Cleaner - iKlear & Klear Screen range - Offers iKlear & Klear screen LCD screen cleaner range that are designed for the specific cleaning requirements of your computer or PDA’s screen without damaging the surface. They are alcohol and ammonia free with a special range of polishing cloths made from materials suitable for your LCD screen. Also includes Klear Screen High Definition Kit which has proven popular with owners of LCD and Plasma Screen TVs.
screenclean.co.uk
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Satellite industry portal - The largest satellite and space industry directory on the web. Contains some fascinating links to the professional / supply side of the satellite industry. The site links directly to the web sites of companies involved in satellite communications worldwide. The list is categorised by type of product or service supplied.
satellite-links.co.uk
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Electrical Appliance Business Plan - The Electrical Appliance Business Plan offers electrical plans to start ups or existing businesses. The plans are written by industry experts and is suitable for review by banks and investors.....
a-2-z-business-plans.com
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X-Flex Xenon Lights - Sparks Electrical and Lighting wholesalers offer lighting for both industrial and domestic needs. They also offer lighting solutions in the form of Flex Xenon Lights, Dimming Systems, Switches and Sockets, Fire and Security Heating lights, Ventilation lights and more....
sparksdirect.co.uk
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HDTV Buying Guide - HDTV is a new standard that combines high-resolution pictures with Dolby digital surround sound to produce the ultimate TV experience. The HDTV Buying Guide offers extensive information, FAQ`s, guides and advice on High Definition Televisions. Find HDTV’s, HD equipment, accessories and more.....
hdtvbuyingguide.co.uk
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Plasma, LCD and Laptop Screen Care and Cleaning - A range of screen care products including screen burn removal, calibration, HDTV screen savers, accessories and 100% safe display cleaners. The firm also offers reviews on the latest televisions and screen types...
screen-wipes.co.uk
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Filron UK - Filron UK are online retailers of a wide range of spares, parts and accessories for computers, printers and electronic goods within the United Kingdom. Find printer consumables for inkjet and laser printers, copiers and faxes....
filron.com
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Computer Monitors - Read reviews, compare prices and find deals on Flat Screens, TFTs, LCDs and all the latest computer monitors. Choose from a wide range of brands including Sony, Samsung, Philips..
computermonitors.org.uk
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