Showing posts with label happy. Show all posts
Step 2 : How do LCD and LED LCD TVs work
Step 2 : How do LCD
and LED LCD TVs work
By Robert Wiley, Senior Editor
How does a LCD (Liquid Crystal Diode) TV operate?
The Basics: LCD TVs and so-called LED TVs work by blocking light. By sandwiching a solution of TN liquid crystals between two perpendicularly aligned panes of polarized glass, it becomes possible to manipulate the intensity of light as it passes through this crystalline matrix and out the glass panel at the other end. Depending on the voltage of the electrical charge running through them, liquid crystals will untwist so that the intensity of light able to pass through the second polarized pane is affected. Basically, these displays can switch between light states (where the liquid crystals are fully twisted) and dark states (where the liquid crystals are fully untwisted), or somewhere along the gray scale in between. The term "liquid" in liquid cyrstals is actually a misnomer as they are not a fluid substance but rather a hard crystal.
Addressing: A liquid crystal display consists of an array of tiny segments-called "pixels"-that are manipulated to form images or to present information. Addressing is the process by which pixels are turned on (which disables the passage of light) and off (which enables the passage of light) so as to create an image on the polarized display pane in front of you. So-called active-matrix LCD TVs employ thin film transistors (TFTs), or tiny switching transistors and capacitors arranged in a matrix on a glass substrate, to direct electric charges down columns to reach a particular pixel. This, in turn, causes the liquid crystals to untwist and "display" a predetermined amount of light generated by the light source-usually a florescent bulb-in back of them.
Color (Re) Production: The light source in an active-matrix LCD TV is a series of florescent bulbs (called CFL or CCFL), or the more newly implemented LED (light emitting diode) backlighting (LED TVs) both of which emits white light through a polarized glass pane behind the liquid crystal solution. Theoretically, then, you can start with a white display: This is one where its liquid crystals are completely twisted and therefore able to direct the full spectrum of light out through the polarized display screen in front of you. Since all wavelengths can pass through, the full spectrum of light can be manipulated to create the desired color. To achieve a full color pallet on your LCD or LED LCD TV, each pixel is divided into three subpixels-red, green, and blue-that work in conjunction to determine the LCD pixel's overall hue. These subpixels are created by subtracting certain wavelengths, and the color(s) corresponding thereto, using special filters. By exploiting a combination of red, green, and blue subpixels of various intensities (or gray scales), a single pixel triad can reproduce approximately 16.8 million colors. Recently, Sharp Electronics has introduced the new Quattron Quad pixel technology which introduces a 4th color pixel - yellow. This increases the number of possible colors 4 fold.
8 STEPS TO BUYING AN LCD TV
Step 1: What exactly is LCD TV?
Step 2: How do LCD Televisions work?
Step 3: What are the advantages of LCD Televisions?
Step 4: What do you need to consider before you buy your LCD TV?
Step 5: Installation Considerations
Step 6: View the Top 10 LCD Televisions
Step 7: How and Where to buy a LCD TV
Step 8: Find reputable online LCD Televisions Dealers
RCA 39LB45RQ 39-Inch LCD Full 1080p 60Hz HDTV (Black)
RCA 39LB45RQ 39-Inch
LCD Full 1080p 60Hz HDTV (Black)
RCA 39LB45RQ 39-Inch LCD Full 1080p 60Hz HDTV features :
- 39" LCD panel
- With a 1920 x 1080 Full HD resolution
- True 16:9 aspect ratio
- View your movies as the director intended
- Wide 178-degree vertical and 178-degree horizontal angles
- See a clear picture from anywhere in the room
- Built-in digital tuner
- Watch digital broadcasts, including HDTV programs where available
- High brightness of 350 cd/m2
- Brightness provides a great picture
- 5,000:1 dynamic contrast ratio
- HDMI Inputs: 2
- 39" screen measured diagonally from corner to corner
- Wall mountable
- VESA standard
RCA 39LB45RQ 39-Inch LCD Full 1080p 60Hz HDTV overview :
The RCA 39LB45RQ 39-Inch LCD Full 1080p 60Hz HDTV provides you with a brilliant full HD 1080p picture for your viewing pleasure. The wide 178-degree vertical and 178-degree horizontal angles enable optimal views from anywhere in the room, and its ultra-slim design allows you to set it up on a stand or mount it on a wall. The wall-mountable LCD TV delivers 3-D surround sound for a realistic movie experience. It also has a PC video input to connect your computer so you can enjoy high-definition images. The Energy Star-qualified LCD HDTV doesn't consume much power and is eco-friendly.
Tag :
100$ to 500$,
30 to 39 Inches,
best lcd tv,
Black,
enjoy,
entertainment,
family,
happy,
HDTV,
lcd,
LCD HDTV,
LCD television,
lcd tv,
Products,
RCA,
RCA 39LB45RQ,
television,
tv
RCA 22LB45RQD 22-Inch Full 1080p LCD/DVD Combo HDTV
RCA 22LB45RQD 22-Inch Full 1080p LCD/DVD Combo HDTV
RCA 22LB45RQD 22-Inch Full 1080p LCD/DVD Combo HDTV features :
- 22" LCD panel
- With a 1920 x 1080 Full HD resolution
- True 16:9 aspect ratio
- View your movies as the director intended on this RCA 22LB45RQD 22-Inch Full 1080p
- Wide 150-degree vertical and 160-degree horizontal angles
- See a clear picture from anywhere in the room
- Built-in digital tuner
- Watch digital broadcasts, including HDTV programs where available
- High brightness of 300cd/m2 with 5 ms response time
- Place your TV anywhere
- 1,000:1 contrast ratio
- HDMI Inputs: 1
- Enjoy a superior HD experience on the RCA 22" LCD HDTV with Built-in DVD Player with
HDMI one cable solution
- 21.6" screen measured diagonally from corner to corner
- The RCA 22LB45RQD 22-Inch Full 1080p LCD/DVD Combo HDTV, 22LB45RQD is wall mountable
- VESA standard
- Built-in DVD player
- Enjoy all of your favorite movies without the clutter of another device
RCA 22LB45RQD 22-Inch Full 1080p LCD/DVD Combo HDTV overview :
The RCA 22LB45RQD 22-Inch Full 1080p LCD/DVD Combo HDTV, 22LB45RQD provides an amazing Full HD entertainment experience. It has a built-in DVD player so you can watch all of your movies without the clutter of another device. An HDMI port is perfect for a Blu-ray player or other HD device.
Note: You must have a source of HD programming in order to take full advantage of the RCA 22LB45RQD 22-Inch Full 1080p LCD/DVD Combo HDTV. Contact your local cable or satellite TV provider for details on how to upgrade.
