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Projector has gradually entered the family of people, with the projector, natural also want to have a good projector curtain. So I conclude 4 things you need to notice when you plan to buy a new projector curtain.
Screen Gain
Gain: a numerical representation of the intrinsic reflectivity of the curtain material (brightness at all angles). A certain amount of light is projected onto the completely diffuse scattering surface (i.e., the reflectivity is the same at 180 degrees above and below), and the reflected brightness is set to 1. Then, under the same conditions, the same light is projected in the vertical direction of the screen, and the brightness of the center point and the points on the same arc is measured. The ratio of the brightness to the fully diffuse brightness is called the screen gain.
Aspect Ratio
The ratio of width and height of the projection screen directly affects the quality of the picture. Only when the ratio of width and height of the projection screen perfectly matches the natural resolution of the projector and the resolution (resolution) of the signal source, can the display picture be more wonderful. The ratio of width to height of the projection screen mainly includes the following:
At present, 4:3, 16:9 video screen is the most commonly used, users can choose according to their own machine display proportion of the screen.
Contrast
Contrast is very important for the uniformity and resolution of the picture, mainly refers to the ratio of high level to low level, which is commonly referred to as the ratio of bright area to dark area of the picture. A high contrast screen is essential for the hierarchical display of the picture.
Screen Uniformity
The uniformity of the screen is not only reflected in the quality of the picture, but also is closely related to the projection technology of the projector. Good uniformity is enough to ensure the consistency of brightness and color when viewing from 0 ° to 180 ° in the horizontal and vertical direction of the screen. The uniformity of the material on the surface of the screen complements the uniformity of the projector.
Screen Gain
Gain: a numerical representation of the intrinsic reflectivity of the curtain material (brightness at all angles). A certain amount of light is projected onto the completely diffuse scattering surface (i.e., the reflectivity is the same at 180 degrees above and below), and the reflected brightness is set to 1. Then, under the same conditions, the same light is projected in the vertical direction of the screen, and the brightness of the center point and the points on the same arc is measured. The ratio of the brightness to the fully diffuse brightness is called the screen gain.
Aspect Ratio
The ratio of width and height of the projection screen directly affects the quality of the picture. Only when the ratio of width and height of the projection screen perfectly matches the natural resolution of the projector and the resolution (resolution) of the signal source, can the display picture be more wonderful. The ratio of width to height of the projection screen mainly includes the following:
- 1.33:1 (4:3), mainly video/PC images, diagonal x 0.8; The width
- 1.78:1 (16:9), mainly HDTV images
- 1.85:1, mainly wide-screen television signal images
- 2.35:1, mainly used in wide screen stereo image display
At present, 4:3, 16:9 video screen is the most commonly used, users can choose according to their own machine display proportion of the screen.
Contrast
Contrast is very important for the uniformity and resolution of the picture, mainly refers to the ratio of high level to low level, which is commonly referred to as the ratio of bright area to dark area of the picture. A high contrast screen is essential for the hierarchical display of the picture.
Screen Uniformity
The uniformity of the screen is not only reflected in the quality of the picture, but also is closely related to the projection technology of the projector. Good uniformity is enough to ensure the consistency of brightness and color when viewing from 0 ° to 180 ° in the horizontal and vertical direction of the screen. The uniformity of the material on the surface of the screen complements the uniformity of the projector.
