Wanting to buy a new TV, many are faced with a choice problem. Even 20-30 years ago, there were 2-3 TV sets on the shelves of household appliances stores. Now there are dozens of brands, hundreds of models that differ in the set of functions, the method of signal reception, size and price. However, for many, the decisive factor is the choice of the diagonal of the TV.
Instructions
Step 1
The size of the screen (namely, the size of the diagonal) and the dimensions of the TV itself are calculated based on the size of the room itself, where the purchased equipment will stand, the distance from the viewer to the screen and its purpose.
Step 2
The diagonal parameters are expressed in inches (''), and usually 2 digits are indicated - the diagonal of the visible area of the image and the full size of the kinescope or liquid crystal matrix. Some companies go for tricks and indicate not visible, but full size, so when buying, you should clarify both indicators.
Step 3
All TVs are usually assigned to several groups. Most often these are 14 '', 20 '', 21 '', 25 '', 32 '' and 36 '' screens. Along with the growth of the diagonal, the dimensions of the TV itself also increase. Therefore, if you plan to buy a TV with a diagonal of 25 '', then immediately calculate the space for the TV, because even an LCD TV has a depth of up to 60 cm. Besides? according to safety standards, a gap must remain between the body and the wall or walls of the niche in order to avoid overheating of the equipment.
Step 4
For the same safety standards, but for health, it is necessary to calculate the size of the diagonal and the recommended distance from the viewer's eyes to the screen. If this is a standard TV with a 4: 3 aspect ratio, then the distance should be at least 3, and preferably 5 diagonals of the TV.
Step 5
Think about the place where TV viewing will be organized, where the TV will stand, measure the distance and divide it by 5. The resulting figure will be the maximum diagonal of the TV. For example, the chair on which the viewer will sit is 3 meters away from the TV stand, so it turns out that the optimal diagonal will be 60 cm or 24 inches.
Step 6
Divide the distance by 3 is only useful if you are aiming at buying an LCD TV with at least 100Hz sweep and a 4: 3 aspect ratio. In such TVs at a relatively close distance, screen flickering, which is the main negative factor affecting health, is almost imperceptible.
Step 7
Radiation at such distances is not harmful, it can only be dangerous in the immediate vicinity of the screen, at a distance of several centimeters. For 16: 9 LCD TVs, the recommended distance is at least 2.5 times the screen diagonal.
