Samsung LTM215 Manual do Utilizador descarregar pdf (Página 10)

PRODUCT INFORMATIONPRODUCT INFORMATION

Note (9) Color Grayscale Linearity

a. Test image : 100% full white pattern with a test pattern as below

b. Test pattern : Squares, 40mm by 40mm in size, filled with 255, 225, 195, 165, 135 and

105 grays steps should be arranged at the center⑤ of the screen.

c. Test method

-1

gray step : move a square of 255 gray level should be moved into the center of the

screen and measure luminance and u’ and v’ coordinates.

- Next gray step : Move a 225 gray square into the center and measure both

luminance and coordinates, too.

luminance

and

coordinates,

too.

d. Test evaluation

u'v'= (u' - u' ) +(v' - v' )AB

Where A, B : 2 gray levels found to have the largest color differences between them

i.e. get the largest ∆u’ and ∆v’ of each 6 pair of u’ and v’ and calculate the ∆u’v’.

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Samsung LTM215 Manual do Utilizador Página 10