Tech Talk

LED & LCD TV Explained

LCD stands for “liquid crystal display” and technically, both LED and LCD TVs are liquid crystal displays. The basic technology is the same in that both television types have two layers of polarized glass through which the liquid crystals both block and pass light. So really, LED TVs are a subset of LCD TVs.

LED, which stands for “light emitting diodes,” differs from general LCD TVs in that LCDs use fluorescent lights (Cold Cathode Flourescent Lamps) while LEDs use light emitting diodes. Also, the placement of the lights on an LED TV can differ.
The fluorescent lights in an LCD TV are always behind the screen. On an LED TV, the light emitting diodes can be placed either behind the screen, (DIRECT LED) or around its edges (Edge Lit LED TV). The difference in lights and in lighting placement has generally meant that LED TVs can be thinner than LCDs. It has also meant that LED TVs run with greater energy efficiency and can provide a clearer, better picture than the general LCD TVs.

LED TVs provide a better picture for two basic reasons. First, LED TVs work with a color wheel or distinct RGB-colored lights (red, green, blue) to produce more realistic and sharper colors. Second, light emitting diodes can be dimmed. The dimming capability on the back lighting in an LED TV allows the picture to display with a truer black by darkening the lights and blocking more light from passing through the panel. This capability is not present on edge-lit LED TVs but only on Direct LED TVs.
The above diagram shows how local dimming effectively allows the possibility to dim the specific LEDs in the backlight array to drastically increase the contrast, improving the black levels while simultaneously brightening bright areas of the image ! This can be seen on the Philips 9000 series of LED TVs !

 

 

 Some distinguishing features of Philips TVs

Ambilight effectively expands your viewing experience. This patented Philips technology enlarges the screen more than ever before by projecting a glow of light from the back of the TV screen onto the surrounding wall. Ambilight automatically adjusts the colour and brightness of the light to match the TV picture. Thanks to the wall-adaptive function, the colour of the light is perfect, regardless of your wall colour.
Moth Eye is inspired by the perfection of natural evolution by using special nanostructures as found in moths’ eyes. Known as the most perfect anti-reflective surface, they help the moth to hide from predators. These extraordinary properties extend the image contrast by deepening the blackness of dark tones, while increasing the lightness of bright elements without halos or reflections. Enjoy a true-to-life contrast with incredibly brilliant detail.
Philips TVs are notoriously easy to use ! With PhilipsEasylink, Philips takes plug and play to a whole new level! Watch the following video to truly understand the simplicity of easylink !

 … Now something about Car Audio…

New Clarion CZ702E High end Car stereo.

This summer, Clarion adds a little colour to your dashboard!The CZ702E is a car radio with a pure design, offering a choice of 728 backlighting colours with high quality audio sound.

An array of functions to simplify your life

The Clarion CZ702E makes life easier with its integrated Bluetooth Parrot module. This allows you to answer calls in complete safety with the hands-free mode, transfer your phone book to your car radio to allow callers’ names to be displayed and, thanks to the audio streaming function, you can also listen to music stored on your mobile directly on your car radio.

What is Bluetooth?  

First of all, bluetooth was invented in the 90′s by Ericsson. The word bluetooth derives from the danish king Harald Blatand in the 10th century.Harald united the tribes of Denmark into one nation, gaining a reputation among historians for getting different peoples to communicate. It’s this reason that when the technology invented in the mid 1990s that united different devices through wireless communication was called Bluetooth. The Bluetooth logo combines the symbols of Harald’s initials.

How does Bluetooth work?

Bluetooth works using wave radio technology through the 2.4 to 2.485GHz transmission band. It’s relatively low powered, giving it an  long battery life. A Bluetooth device contains a small computer chip, enabling the user to connect that to other products within a ‘Personal Area Network’ (PAN) of 50 metres.

Bluetooth can transfer files between two mobile phones without physically needing to attach them with wires. Bluetooth can be used to connect to handsfee systems or else transfer audio information from mobile phone to either a headset,sound system or even a car stereo. This particualr feature in blueooth is called Advanced Audio Distribution (A2DP).

Parrot Bluetooth for hands-free communication, phonebook access and audio streaming

Benefitting from multimedia connectivity, the CZ702E enables you to listen to your CDs, MP3/WMA files and even the files stored on your iPod or iPhone by connecting them to the USB port. As for the radio, the CZ702E is equipped with an RDS tuner, which can store up to 30 stations, and FM anti-interference, giving you a pure sound and exceptional clarity.

Seamless enjoyment with superior iPhone and iPod connectivity

 

iPod ABC search & simple control mode

 

Clarion’s CZ702E is the perfect car radio for people who are into nice products & high quality sound. Its pure and cool design goes well in all car interiors. What’s more, you can choose from 728 colour options to backlight the buttons and screen: an ideal way to adjust the style of your interior, as and when you wish… without changing your car radio.

728 variable colour illumination for just the right look for your car

 

Clarion Sound Quality features:

Clarion offer a 5V / 6channel pre out system on this head unit. This allows you to improve the quality of your sound system by adding amplifiers, subwoofers and control them individually from the car stereo it self!

System     5V / 6-channel audio pre-out

Beat EQ Plus for user customisable sound

Beat EQ Plus for user customisable sound

In addition to providing 3 preset equalisation patterns — BASS BOOST, IMPACT and EXCITE — Clarion’s Beat EQ Plus allows you to change each pattern by splitting the sound spectrum into 5 different bands. You can accurately adjust the sound to your liking, depending on the genre of music, for a more fulfilling listening experience.
Built-in High Pass and Low Pass filters

Built-in High Pass and Low Pass filters

The internal High Pass and Low Pass filters allow your music to be played at the exact levels that they were meant to be heard. Enjoy bass with more muscle and highs with more clarity
4 × 50 watt with MOS-FET power amp

4 × 50 watt with MOS-FET power amp

CZ702E features an MOS-FET (Metal Oxide Semiconductor Field Effect Transistor) power amplifier capable of delivering 4 × 50 watt of high quality sound with superior linearity and less distortion than conventional power amps-even with the volume cranked up.
Digital time alignment with 3-way crossover

Digital time alignment with 3-way crossover

Digital time alignment assures that the sound from each speaker reaches the listener at the same time for perfect sonic imaging. The 3-way crossover separates the sound into different bands to match each speaker’s output range.