Core parameters of projector screen purchase
1. Screen gain
The screen gain is the brightness of the projection screen reflected to our naked eye when the brightness of the projector and the external ambient light remain unchanged.
The ratio of the brightness that hits our naked eye. Normally a white wall is considered a projector screen with a gain of 1. Gain is the key to determining the brightness of the picture,
is an important parameter for image brightness enhancement.
How to calculate the brightness after gain? Assuming a projector brightness and 1000ANSI lumens, then when it is projected on a screen with a gain of 1
When the screen is on, the screen brightness is 1000ANSI lumens; if projected on a screen with a gain of 1.5, the screen brightness is
15000ANSI lumens.
The low-gain screen is more realistic, but it is easily affected by ambient light; while the high-gain screen is brighter and is affected by the environment and external environment.
Light has less effect. However, the gain of the screen is not as high as possible. Too strong gain will cause the white balance to be out of balance and the picture to reflect excessively.
The gain of this general projection screen is between 0.9-2.0.
2. Projector screen light resistance
That is, the ability to resist the influence of stray light on the picture. For example, if you project a picture in a pure black environment, only the light emitted by the projector will be blocked by the screen.
Cloth reflection, if the light is turned on at this time, the light emitted by the lamp will also shine on the projector screen and then be emitted into our eyes, thus affecting the
We see the clarity of the picture, and the light resistance of the projector screen is the ability to reduce the impact of such stray light on the picture, but reducing ambient light also
will cut the projector light.
Similarly, the light resistance of the screen is not as strong as possible. Too strong light resistance will cause the entire screen to be significantly darker.
3. Viewing angle
To put it bluntly, it means that we can see the angle of the projected picture clearly when we sit on the side, just like a movie theater, not everyone can.
Sit right in front of the screen. Because when you sit in front of the screen and watch, the brightness of the picture is the highest and the effect is the best;
The brightness of the screen will decrease accordingly.
Under normal circumstances, the greater the gain of the projection screen, the smaller the viewing angle, and the relationship between the two is inversely proportional.
4. Color reproduction
That is, color accuracy, the accuracy of the color of the picture when the projector projects the picture on the screen. Color reproduction is also related to the material of the projector screen
Under normal circumstances, the order of several common projection screen color reproduction capabilities is as follows:
In the dark environment: soft white screen>anti-light screen>white glass screen>white plastic screen
In bright environment: anti-light projection screen>soft white projection screen>white glass projection screen>white plastic projection screen
