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Toshiba 26HL67 LCD TV Review

Toshiba 26HL67 LCD TV is one of the high end LCD TVs that incorporate the latest LCD technologies like PixelPure 14-Bit Internal Digital Video Processing and DynaLight Dynamic Back Light Control. The pictures are indeed very sharp, lively, crystal-clear. The picture quality of High Definition materials from DVDs or HDTV sources is indeed quite exceptional. It is definitely one among the best HDTV enabled LCD TVs that are available in the television market.

Main features:

• 26 inch screen
• Screen format: 16:9
• Native resolution: 1366 x 768 pixels
• Dynamic Contrast Ratio of 3500:1
• Digital Tuner
• Response time 8 ms
• Three HDMI inputs
• Two SCARTS (one of them is RGB enabled)
• One AV input
• 15 pin VGA PC Input
• Dolby Digital Dynamic Range control
• SRS WOW sound feature

PixelPure 3G is a unique Toshiba technology that uses 14-Bit Internal Digital Video Processing to produce 4,096 levels of gradation for a crisp, smooth and true-to-life picture without image banding.

Backlight source is one of the features that ensures good picture quality with deeper black level that increases detail and depth, even in dark rooms. DynaLight examines the light intensity of each video frame, and automatically adjusts the backlight source depending on the image content. Thus the signal analysis done by this technology ensures the display of 256 levels of backlight intensity. Due to this, we get contrast ratio which is five times that of the original panel contrast.

Toshiba 26HL67 LCD TV comes with cinespeed feature which means it has a faster response time of 8 ms which enables the viewing of high-action home theater images. Together, this LCD TV supports a decent wide viewing angles of more than 170 degrees.

The design element is indeed impressive with a glossy, black frame surrounding the screen. The rear part of the display has many inputs. You can find two HDMI inputs and two SCARTs. You can also find a VGA PC input on the rear side.

SRS WOW sound system produces excellent highs and lows and The SoundStrip Speaker System uses extremely thin speakers, however with enhanced dynamic effects.

LG 37LC2DB LCD TV

LG 37LC2DB LCD TV has come with features like 37 inches screen, flat screen, SRS TXT sound, digital tuner, 3 scarts, on screen display, wall mountable, parental lock and sleep timer.

LG Company has produced this appliance with a screen size of 37 inches. This measurement is taken diagonally. Therefore you can view your favourite programs and pictures in this 37 inches screen. The screen is a flat screen. This unit has the ability to offer SRS TXT type of sound quality. It has availed with digital tuners for tuning purposes.

LG 37LC2DB LCD TV has the ability to offer brightness up to 500 cd/m2. The highest contrast level of this TV is 1600. It is advisable not to use the maximum contrast and brightness. The appropriate viewing angle of the TV is measured as 178 degrees both horizontally and vertically. It uses 3 different scart connectors. You can get a stand in addition to this unit. It is easy to mount this unit on the wall as it has come with wall mountable feature.

When you want prevent your children from watching some programs, you can use the parental lock option. You can lock certain channels therefore your kid can not view those channels without releasing the lock. This parental lock option is very easy to use. You can activate this option with the help of a remote control without touching the TV.

The sound quality of LG 37LC2DB LCD TV can be enhanced with the help of in-built speakers. These speakers are essential for you to improve the proper sound output to the TV. Therefore you can enjoy the realistic sound when you watch a program. Sleep timer is an additional feature and it can be used to set a specific time. You can get a cute light weight remote control in addition to this device. The smart dimensions of the TV has come with features like 659 x 944 x 129.7 mm as H x W x D.

Philips 20PF5320 LCD TV

Philips 20PF5320 LCD TV has come with features like 20 inches screen, LCD technology, HDTV compatibility, wide screen, HD ready, progressive scan, Dolby digital system of sound, viewing angle up to 176 degree etc. to impress the users.

Philips 20PF5320 LCD TV has availed with 20 inches screen. This is measured diagonally from cornet to corner. It uses the latest display technology of LCD. LCD is short form of Liquid Crystal Display and it uses liquid display to procure or display images on the screen. This technology has availed with liquid crystals. These crystals are sandwiched between 2 different plates made of glass material. The viewing angle of this liquid display will be better than the other technology.

It has been equipped with the upcoming technology of HDTV. This is broadly known as High definition Television. This technology is strictly required for receiving high definition signals. This has the potential to display even HD with the help of HD Screen. When the screen has the capability to display these high definition signals, it is said to be HD Ready. Here the term “ready” represents the screen of the TV. It is possible to display high signals like 1080i and 720p by using this HD Ready. It is a license which can be only executed by EICTA.

The standard picture format of the TV is measured as 4:3 and it is measured to indicate the relationship between the total height and breadth of the TV screen. It has featured with wide screen format and this format will be better for watching movies. It has the capability to produce an image in a single pass as same as the computer monitor. You have stereo sound systems in this unit with the support of virtual surround and Dolby surround.

The LCD display technology has the capability to produce resolution on the screen up to 1366 x 768 pixels. It has a maximum potentiality to create contrast ratio up to 500:1. The maximum ability to produce brightness is up to 450 cd/m2 in the Philips 20PF5320 LCD TV. The perfect horizontal and vertical angle of the TV is measured as 176 degrees. You can get a view better in this angle. The actual time taken to response for pixels is just 25 milliseconds. It uses DVI type of input and scart connections.

What is a LCD TV?

LCD TV – An Introduction
A LCD TV uses LCD technology which can provide slim design, a flat viewing surface, larger screens and higher-quality images. A liquid crystal display TV is an extremely thin TV set with a profile of 4” or less and consumes much less electricity in comparison with conventional CRT TVs or modern Plasma TVs. This is one of the reasons why LCD devices are ideal for electronic devices like laptops which can work for a longer time using batteries.

A LCD screen consists of numerous pixels and other colour filters to produce display with the help of a rear backlight device. LCD uses liquid crystals which function like gates that allow and block the passage of light through them. In a LCD display, the picture quality is usually determined by the various features like resolution, colour reproduction, screen refresh rate or response time and viewing angles. Flat panels like plasma TVs and LCD TVs have their own advantages and disadvantages based on how they perform in these areas and on the factors like light design, portability, durability, longevity etc.

One of the major qualities that make a LCD TV quite distinct from other display technologies is its ability to support higher resolution. Native resolution of a screen refers to the number of pixels or tiny dots that occupy a square inch of the screen. Display devices like LCD TV uses millions of pixels to produce an image. Since a LCD has millions of pixels, they are able to produce smooth, sharp and true-to-life images.

During the time when there is a lot of hype about HDTV and its resolutions, LCD TVs can best address its display requirements. Present day flat panels are designed to have native resolutions like 1080p, 1080i and 720p. While larger plasma TVs and LCDs can support full HDTV resolution (1080p), it is in the category of smaller screens where a LCD TV has an significant advantage over a Plasma TV. If you like to go for a flat panel below 32” but with full HDTV resolution, you have no other option but to buy a LCD TV since current plasma TVs with similar size are still far away from that spec.

If you make a research before you go for a LCD TV, you will find most LCD TVs are 32″ and smaller. It is because LCD enjoys the most preferred display in the smaller category. Another reason is the price factor. The price difference between Plasma TV and LCD TV in this category is not much while the larger LCDs are usually more expensive. The prices of LCD TVs continue to fall and the newer larger LCDs can quite compete with plasma tvs in terms of performance. However, we need to wait a little more time before a larger LCD TV becomes as cheap as an equal sized plasma TV.

Older LCD TVs had weaknesses like low contrast ratio, narrow viewing angles and higher response time. They showed images without rendering pure blacks or gave distorted vision during off-axis viewing or produced visible image artifacts. The LCD TV makers have largely minimized these defects in newer LCD TVs and you will find the latest LCD TVs can perform as well as Plasma TVs in these areas, or even better.

How does a LCD TV work?

As the name suggests, the display in a Liquid Crystal Display (LCD) TV is based on the inter-active properties of liquid crystals and light. The technology used in making a LCD is called Thin Film Transistor (TFT), which has made tremendous advancements during the last ten years.

What are liquid crystals?
Liquid crystals are cylindrical shaped molecules which allow light to pass through them in their natural, twisted phase. However, they start to untwist or relax, when they are placed in an electric field. The amount of electric current decides the degree of untwisting of crystalline molecules. The more the untwisting of molecules the more the blocking of light rays will be. In their extreme relaxed state, they completely block the light and become opaque. By varying the amount of current, the intensity of light can vary between extreme brightness and blackness.

How LCD TV works?
In a LCD TV, liquid crystals are sandwiched between two transparent electrodes and two polarizing filters. In other words, liquid crystals (most often in nematic phase) are packed between two glass plates. Two grids of electrodes (one is horizontally aligned and another is vertically aligned) contact either side of the crystals. The job of this network of electrodes is to access each pixel of the crystal layer and control the electric flow.

Liquid crystals are not luminious by themselves and it is the backlight device made of fluorescent lamps which give off the light behind them. The light of the backlight is then diffused by a white panel before passing through the liquid crystals. This white panel ensures that the entire surface of the screen gets uniform brightness. The front panel of LCD is made up of a grid of wires which are in contact with each pixel of the screen and activate it separately.

With in network of crystals, each molecule functions like a gate to open or close the passage of light through them depending on the voltage of the current. To produce bright display, the voltage is kept low while for dark details the voltage is increased. By nature, liquid crystals always allow a smaller amount of light to pass through them making the pure black levels somewhat impossible.

Passive Matrix structure and Active Matrix structure
There are two options for controlling voltage – using passive matrix structure or active matrix structure. In the passive matrix structure of electrodes, one pixel can be accessed at a time. LCD displays with lesser resolution like simple mobiles, wristwatches use this option. However, the refresh rate will be usually slow and the voltage control would not be proper. Picture may not have outstanding clarity.

Large LCD displays like flat panel LCD television use the advanced active matrix structure. The electrodes will have an additional template of thin film transistors (TFT) which is capable of addressing the exact pixel and changing the colour of sub-pixels without involving the nearby pixels, as a result, better clarity of details and more colour preciseness are achieved. TFT also function like capacitors storing electric charge during the refreshing cycle of pixels.

How does a LCD TV produce colours?
In earlier mono-chrome LCD displays, only two basic colours were available, most of them had green as their back-ground colour. In a colour LCD display, as in Plasma TV, a pixel (picture element) has three sub-pixels – red, blue and green. In addition, there is a colour filter placed before the crystal layer to produce the overall colour of the pixel. As the name indicates, colour filters filter the colours from the colour spectrum and produce innumerable combinations of basic colours (red, blue and green) to form coloured display

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