Why are televisions and laptop computer screens rectangular in shape?
Computer screens have been led by television screens - both because of the technology, and because television screens have been common to use as computer monitors - and television screens have been led by cinema. Even when making a rectangular screen was difficult (CRTs are easier to blow into a circle (although their electron beams prefer to follow a path that describes something closes to a rectangle)), it was the ideal format for displaying these images.Early moving pictures (as with some today) were shot on film. Film comes as a perforated strip, so it can be fed through the camera to take successive shots. Rectangles tessellate well on these strips.The format shown is academy ratio. That's 1.37:1 - very close to the 4:3 settled on by television companies for many decades.The more common ratio for monitors and televisions now is 16:9. This too came from cinema. It's between standard US widescreen - 1.85:1 - and European Super 16 Widescreen - 1.67:1There are some current technological reasons for retaining this shape: a position in 2D space requires two numbers - X and Y. When you put limits onto each of these scales, you describe a rectangular coordinate space. Any other shape would have redundancy.There are also aesthetic reasons: we use computer screens and televisions to view pictures. Pictures are usually rectangular, though maybe through habit, and the sale of rectangular pieces of canvas and paper (again, rectangles tessellate well).That aside, we're finally seeing some alternatives occurring.Watches are an ideal platform for circular OLEDs or TFTs. Virtual reality helmets contain lenses which make their rectangular screen approximate circles.Camera lenses are round, and so is our field of vision (more or less. It's two, almost completely overlapping, circles). I'm looking forward to the possibility of more round screens.
How to fit picture correctly into CRT TV screen?
You are going to loose some picture to the sides, as CRT sets had a feature known as "overscan" where the entire picture was actually larger than what you saw on the screen. When a television show was produced, this was taken into account. Items such as banners or "crawls" along the bottom and top of the screens were set in a bit to compensate for this. This was adjusted this way from the factory, and it not a user adjustment. In your case, the set has deteriorated and the picture has shifted to the left. It can be adjusted by a service technician, but you need to weigh out the cost of repairs on an obsolete television set vs. making an upgrade to a flat panel set where the entire picture IS shown.
When I operate electrical switches at my home, my LCD TV shuts off momentarily. Why?
This usually happens when the contacts of some switches 'bounce' . The switch contact does not settle down to a definite state immediately, but is loose enough to 'make' and 'break' a couple times rapidly. If there is a substantially inductive device (motor, tubelight, etc.) attached to it, it produces an overvoltage on the line. Since in domestic wiring everything is connected to one MCB for a line, i.e. all circuits of ground floor connected to one MCB, this overvoltage reflects on everything connected electrically on that line (ignore all equipment that is off). This also happens when one switches load OFF and causes a small arcing at the switch.Your TV is reacting to such momentary overvoltages, i.e. it's internal power supply is detecting the overvoltage and temporarily shutting down internal voltages to protect the set.There are 2 possible solutions:1. Connect the TV to the mains through a good surge protector ('spike buster'), as others have suggested2. Check each switch individually if operating it causes the TV to flicker. Replace the culprit switches with new ones
Can a tv with a big back have an HDMI cord?
The answer suggesting that as a CRT it would not have an HDMI Input would probably be correct if it were a smaller screen, say up to 36" measured diagonally. This is because the older style CRT - Direct View, as opposed to Projection - had a size limit due to manufacturing restrictions of size of a large glass tube, and this style did not typically have HDMI. But a 55", even a CRT, is certainly a Projection (RP - Rear Projection) design and many of these were made with HDMI Input (we had one at our house). Not all, however, so you'll just need to find out if it has an HDMI port or not. However, even without HDMI you can still get HD resolutions (720 or 1080i) through Component (Red/Green/Blue video cable connectors, with Red/White Right/Left stereo audio). So you can hook up your XBox 360 and get HD images regardless of HDMI input. Hope this helps clear up confusion... Good luck!
Can i put my tv on top of refrigerator?
I hang my tv old on top of my refrigerator, now its broken I'm not sure it broke because its old or i can't put a TV on top of the refrigerator? i use a TV stand with 10" gap form TV to Refrigerator.