TV size and viewing distance

         TV size refers to the diagonal length of TV screen , In inches （1 Inch =2.54 centimeter ）. And at present, the standard screen ratio of most LCD TVs has become wide 16：9. According to Pythagorean Theorem , The length of the diagonal is √337（ Radical sign 337） Open derived . The ratio of screen height to diagonal is 9÷√337.

         Generally speaking, in the view of the industry , The actual viewing distance is of the screen width 2 About times .3 Good sense of presence , If it is less than this distance, it will be more tired , and 5 No shock when viewed from a distance of times .

         Set the minimum size of TV set as A（ Inch ）, The maximum size of the TV set is B（ Inch ）, The viewing distance is L（ centimeter ）. Now? , We can build such an equation .

2.54A x (9÷√337)×5＝L Available ：A=L÷6.226

2.54Bx (9÷√337)×3＝L Available ：B=L÷3.736

In fact, the choice of TV size , There is a set of calculation formulas ：

Maximum TV size （ Inch ）= Viewing distance （ centimeter ）÷3.736

Minimum TV size （ Inch ）= Viewing distance （ centimeter ）÷6.227

TV size （ Inch ）	Minimum viewing distance （ rice ）	Minimum viewing distance （ rice ）
32	1.2	1.99
48	1.79	2.99
50	1.87	3.11
55	2.05	3.42
65	2.43	4.05
70	2.62	4.36
75	2.8	4.67
80	2.99	4.98
86	3.21	5.36
98	3.66	6.1

         From the current overall TV sales situation ,43、55 as well as 65 Inch TVs are popular , among 43 Inches or so for the bedroom ,55、65 Inch is the largest size segment sold at present , Because its size can be well applied to the mainstream living room , therefore , Before you buy a TV, you might as well think about where to put it , Let's see how big the space of the house is .

         It is suggested that we can choose a larger TV in the best size range when purchasing , Because I don't know until I actually use it , The bigger the TV is, the better it looks .