A PPD between 30 and 35 is borderline in that the pixel structure may or may not be noticeable. When DLP displays are used, for example, the pixel structure is usually noticeable when the PPD is under 30, and it is usually not noticeable when the PPD is over 35. When the pixel structure is noticeable, it is commonly called the "screen door effect" (SDE). Conversely, the pixel structure becomes more noticeable if the PPD is decreased, which can happen as a result of decreasing pixel count, increasing screen size, and/or decreasing viewing distance. The pixel structure becomes less noticeable if the PPD is increased, which can happen as a result of increasing pixel count, decreasing screen size, and/or increasing viewing distance.
#PIXEL RESOLUTION CALCULATOR 480P#
For example, if the PPD is 33.51 on a 1080p DLP display viewed from 1.0W, and the PPD is 33.51 on a 480p DLP display viewed from 2.25W, then the pixel structure is equally noticeable.
It can represent how noticeable (or unnoticeable) the pixel structure is. The PPD (Pixels Per Degree) is the number of pixels per degree of the viewing angle. The following values are provided for comparison in ascending order. Resolution measured in Cycles Per Degree (assuming a typical Kell factor of 70% applied to the PPD) Viewing Distance measured in Screen Heights Viewing Distance measured in Screen Widths The following values are always calculated and cannot be entered. Click the button of the blank parameter to calculate it. Change the selections for Type, Dimension, Units, and Aspect Ratio as desired. One of the four parameters may be left blank. Enter values for any three parameters below.