Display details:
Screen Diagonal: inches
Screen Resolution:
Screen Width:
Screen Height:
Aspect Ratio:
Dot Pitch:
PPI:
Minimum distance[1]
Maximum distance[2]
Visual Acuity distance[3]
Notes:
The calculator needs three pieces of information. The first is how far you sit from the screen, measured in feet. The second is what shape your screen is, and the third is screen size. You may enter either the diagonal screen size or the screen width. This screen resolution calculator provides an easy and powerful tool that can convert image ratio to pixels resolution and pixels to ratio dimensions. To calculate aspect ratio you need to provide Pixels Width and Pixels Height, the aspect ratio will be calculated automatically. There are a number of ratios that get roughly close. Multiplying the seating distance by 0.6 will yield a TV size that will be close to a 30° viewing angle, while multiplying the seating distance by 0.84 will get you a TV size close to the 40° viewing angle.
- The audience should sit at least this distance from the screen. This is the Shortest Recommended Viewing Distance based on Field-of-View being too wide: This distance is calculated on the peripheral vision field of view of the human eye. The average FOV width for the human eye is 140 degrees. The rule is that if the viewer sits any closer than this distance to the screen and looks at one side of the screen, they will not be able to see the other side of the screen with their peripheral vision. This equates to a 70-degree field of view when the person is looking at the center of the screen. ⬆
- The audience should sit at most this far from the screen. This is based on THX Longest Recommended and Longest Allowable viewing distances: THX publishes standards to which movie theaters must adhere to receive THX certification. THX recommends that the back row of seats in a theater have a 36 degree or greater viewing angle and requires a minimum of a 26 degree or greater viewing angle to receive certification. (Note: sitting closer to the screen results in a wider field-of-view.) ⬆
- The Visual Acuity Distance based on Visual Acuity. This distance is calculated based on the reference resolving power of the eyes. The human eye with 20/20 vision can detect or resolve details as small as 1/60th of a degree of arc. This distance represents the point beyond which some details in the picture are no longer able to be resolved, so pixels begin to blend together. Closer to the screen than this may result in the need for higher resolution display. This value should be lowered if visual acuity is worst then 20/20, raised if visual acuity is better. ⬆
What is throw distance for a projector?
A projector's distance from the lens to the screen surface is called the Throw Distance. The throw distance and the size of the image it produces on the screen are proportional to each other based on the optics of the lens. As you increase the distance between the projector lens and the screen the image will also increase.
How far do you put a projector from the screen?
A projector's distance from a screen and the size of the image it produces are proportional to each other based on the optics of the lens. As you increase the distance between the projector and a screen the image will also increase. If your projector has a zoom lens, the lens can be adjusted to change the size of the screen image without changing the distance of the projector. Since each projector lens is different, an online projection calculator tool will help you calculate the size of an image on a screen relative to how far the projector is placed from screen.
What is a throw ratio for a projector?
Tv Screen Ratio Calculator Download
For any given projector, the width of the image (W) relative to the throw distance (D) is know as the throw ratio D/W or distance over width. So for example, the most common projector throw ratio is 2.0. This means that for each foot of image width, the projector needs to be 2 feet away or D/W = 2/1 = 2.0. So if I'm using a projector with a throw ratio of 2.0 and I have an image width of 5 feet, then my throw distance must be 10 feet. So the throw ratio is a simple formula that let's you easily compute throw distance or image width given that you know one of these measurements. A projector zoom lens will have two different throw ratios, one for the minimum zoom setting and one for the maximum zoom setting.
Tv Screen Ratio Calculator Uk
What is considered a short throw projector?
Television Screen Size Calculator
A short throw projector is a projector with a lens that has a throw ratio of 0.4 (distance/width) or less. These projectors are ideal for rear screen applications where the area behind the screen is limited, or for a wall mounted application where the projector will be mounted within 1 or 2 feet from the screen. The goal of these projectors is to produce as large of an image within the shortest amount of space between the projector and the screen.
