CN205176476U - Optical projection curtain of anti environment light - Google Patents

Abstract

The utility model discloses an optical projection screen for resisting ambient light, which comprises a screen body. The screen body includes a PET base layer, an imaging layer and a transmission layer. The upper surface of the PET base layer is provided with a group of concave micro-lenses. A microlens array structure is formed, the inner surface of each microlens is coated with an aluminum film layer, the image-forming layer is covered on the upper surface of the PET base layer, and the transmission layer is arranged on the image-forming layer. The optical projection screen of the utility model uses the optical performance of the lens to increase the screen gain, and greatly increases the color brilliance and contrast of the projection screen in a bright environment; the projection screen is made of good material, friendly to the environment, no pollution, easy to install, and suitable Any model of front projection projector on the market.

Description

A kind of anti-environmental light optical projection screen

technical field

The utility model belongs to image projection and playback equipment, and relates to a high-gain, high-contrast anti-environmental light optical projection screen.

Background technique

The anti-environmental light curtains currently on the market also use conventional spraying of the front surface coating, using a silver high-gain coating, which can present a higher gain, because the silver coating also reflects images, ambient light and projections through diffuse reflection. The light will be reflected to the viewing point of the audience, and the increase in gain will not filter out the interference of ambient light. The contrast ratio of the projection screen is limited due to the use of silver coating in the presence of ambient light, and the contrast ratio of the screen surface is limited. Compared with the white screen, the contrast ratio has a better performance.

However, the existing anti-ambient light high-gain screen has a higher gain than the white screen, and the ambient light is not very obvious in practical applications, but it is slightly better than the white screen. The high-gain coating diffusely reflects the input light of the projector and also diffusely reflects the ambient light projected on the coating. When the brightness of the ambient light increases, the brightness and contrast of the imaging decrease accordingly, making the color of the projected image dim , the brightness of the image decreases until the image cannot be seen on the projection screen. Therefore, in the existing anti-environmental light curtains, there are problems such as low brightness of the low-brightness projector screen, dim color of the screen, poor black field performance of ordinary white screens and silver screens, and low contrast in the case of bright ambient light.

Utility model content

Technical problem to be solved: the utility model provides an optical projection screen with high gain and high contrast against ambient light.

Technical solution: An optical projection screen resistant to ambient light, including a screen body, the screen body includes a PET base layer, an imaging layer and a transmission layer, and the upper surface of the PET base layer is provided with a set of concave micro-lenses. Microlens array structure, the inner surface of each microlens is coated with an aluminum film layer, the image-forming layer is covered on the upper surface of the PET base layer, and the transmission layer is arranged on the image-forming layer.

The micro-lens has a hemispherical structure, a semi-ellipsoidal structure or a parabolic surface structure.

The arrangement of the microlens array structure is one of triangular arrangement, regular hexagonal arrangement, rectangular arrangement, radial arrangement and circular arrangement, or a combination of at least two of them.

The imaging layer is gray black or light black imaging layer.

The material of the transmission layer is glass microspheres.

Beneficial effects: the optical projection screen of the utility model uses the optical performance of the microlens to increase the screen gain, and greatly increases the color brilliance and contrast of the projection screen in a bright environment; the projection screen is made of good material, friendly to the environment, and has no pollution. Easy to install and use, it is suitable for any type of front projection projector on the market.

Description of drawings

Fig. 1 is the structural representation of the utility model.

In the figure, 1 is a PET base layer, 2 is a microlens array structure, 3 is an aluminum film layer, 4 is an imaging layer, and 5 is a transmission layer.

detailed description

Example 1

An optical projection screen resistant to ambient light, comprising a screen body, the screen body comprising a PET base layer, an image forming layer and a transmission layer, the upper surface of the PET base layer is provided with a microlens array composed of a group of concave microlenses structure, the inner surface of each microlens is plated with an aluminum film layer, the image-forming layer is covered on the upper surface of the PET base layer, and the transmission layer is arranged on the image-forming layer. The micro-lens has a hemispherical structure, a semi-ellipsoidal structure or a parabolic surface structure. The arrangement of the microlens array structure is one of triangular arrangement, regular hexagonal arrangement, rectangular arrangement, radial arrangement and circular arrangement, or a combination of at least two of them. The imaging layer is gray-black or light black imaging layer. The material of the transmission layer is glass microspheres.

Example 2

Use the precision-machined microlens array mold roller on the PET base layer, heat the roller to 250 degrees Celsius, and precisely control the contact distance between the roller and PET and the rolling time to make it imprint the microlens array (single lens specification is 15μm *15μm), forming a group of micro-lens array structure, the micro-lens is hemispherical, arranged in a rectangular arrangement, the inner surface of the hot-pressed micro-lens is vacuum coated, and coated with an aluminum film layer. Then, a layer of imaging layer is coated on the upper surface of the PET base layer through the coating process, and the imaging layer is mixed with PVC into a uniform gray-black color; then the glass beads are cured by photosensitive adhesive UV or other methods It is fixed on the surface of the imaging layer to form a transmission layer.

The light enters the microlens array structure through the imaging layer, and the lens presents an image on the imaging layer after focusing and reflecting the light, and the image reflects the light through the transmission layer to the viewing point. The optical projection screen reflects light at a specific angle through a specific microlens array, filters the rest of the light except the projector light, and increases the gain of the projection screen. The base material of the curtain is painted with a gray-black background color to increase the contrast of the curtain, which is more than 5 times higher than that of the white curtain. The projection screen surface adopts microstructure coating technology, which increases the half-gain viewing angle while improving the gain.

Claims (5)

1. the optical projection curtain of an environment resistant light, comprise curtain body, it is characterized in that curtain body comprises PET base layer, imaging layer and transmission layer, the upper surface of PET base layer is provided with the microlens array structure be made up of one group of lenticule in spill, described each lenticular inside surface is coated with aluminum membranous layer, described imaging layer is overlying on the upper surface of PET base layer, and transmission layer is located on imaging layer.

2. the optical projection curtain of a kind of environment resistant light according to claim 1, is characterized in that described lenticule is hemispherical dome structure, semiellipse spherical structure or parabolic surface structure.

3. the optical projection curtain of a kind of environment resistant light according to claim 1, is characterized in that the arrangement mode of described microlens array structure is one of rounded projections arranged, regular hexagon arrangement, rectangular arranged, radial arrangement, circular arrangement mode or is combined by wherein at least two kinds of arrangement modes.

4. the optical projection curtain of a kind of environment resistant light according to claim 1, is characterized in that described imaging layer is grey black or light/dark balance imaging layer.

5. the optical projection curtain of a kind of environment resistant light according to claim 1, is characterized in that the material of described transmission layer is glass microballoon.