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Projection display equipment with multilayer reflecting thin-films

A technology of projection display and film, applied in the field of projection display, can solve the problems of poor imaging effect of transparent display, and achieve the effect of good transparent display, improved contrast and clear imaging

Inactive Publication Date: 2015-10-07
徐州奕创光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problem of poor imaging effect of transparent display, the technical solution of the present invention is:

Method used

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  • Projection display equipment with multilayer reflecting thin-films
  • Projection display equipment with multilayer reflecting thin-films
  • Projection display equipment with multilayer reflecting thin-films

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] figure 1 Shown is the structure of the projection device of this embodiment. The light source that projector 1 adopts in the present embodiment is RGB three-color laser light source, and the wave band of red light is 638nm, and the wave band of green light is 532nm, and the wave band of blue light is 445nm; The side is coated with red light reflective film 4-R, green light reflective film 4-G and blue light reflective film 4-B; the red light reflective film 4-R reflects the red light band 638nm and transmits other wave bands; the green light reflective film 4-G reflects the green light band 532nm, and transmits other wave bands; the blue light reflective film 4-B reflects the blue light band 445nm, and transmits other wave bands; therefore, the entire projection screen can reflect the projection light 1-1 of the projector 1 and It presents a clear image, and at the same time, because the projection screen is transparent to other wavebands (most wavebands of visible lig...

Embodiment 2

[0029] The projection display device in Embodiment 1 can be applied to the display of automobile windshields, image 3 A schematic of the application is shown.

[0030] The projector in this embodiment uses a micro-projector 5, and the wavelength band of the light source of the micro-projector 5 is the same as that in Embodiment 1. The micro-projector 5 is positioned at the bottom of the automobile windshield 6, and the windshield 6 (can be a whole piece of windshield, or only a part of the windshield) is coated with the multilayer reflective film in embodiment 1, and the area of ​​coating is a reflective film Zone 6-1; when the micro-projector 5 displays images, the reflective film zone 6-1 will reflect the images into the driver's eyes. Since the line width of the laser itself as the light source of the micro-projector 5 is very narrow, it is equipped with a narrow-band film that only reflects the laser wave band, and the film transmits light in other wave bands at the same...

Embodiment 3

[0032] Figure 4 Shown is the basic structure of the projection display device of this embodiment.

[0033] What is different from Embodiment 1 is that the transparent medium substrate is replaced by a black substrate 3, and each reflective film can only be plated on the incident side of the projection light 1-1 of the black substrate 3; The light band is reflected and transmitted to other light bands, so the part of the ambient light that is different from the primary color light is absorbed by the black screen after being transmitted through the multi-layer reflective film, thus reducing the impact of ambient light on the contrast of the projected display image.

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Abstract

The invention discloses two types of projection display equipment with multilayer reflecting thin-films. The projection display equipment comprises a projector and projection screens. The light source of the projector is composed of multiple narrowband light sources emitting primary lights. One projection screen is formed by a transparent dielectric substrate and multiple reflecting thin-films which are coated at the same side or different sides of the transparent dielectric substrate. The other projection screen is formed by a black substrate and multiple reflecting thin-films which are coated at the incident side of projection light of the black substrate. The reflecting thin-films and the primary lights of the narrowband light sources are corresponding in a one-to-one way. The approximate waveband of each primary light is the reflecting waveband of the corresponding reflecting thin-film. The reflecting thin-films reflect light in the reflecting wavebands of the reflecting thin-films, and light of the rest wavebands transmits through the reflecting thin-films. With utilization of the transparent projection screen, imaging on the projection screen is enabled to be clearer and better transparent display effect can be presented; and when the block screen is utilized for projection, frame contrast can be enhanced.

Description

technical field [0001] The invention relates to the technical field of projection display, in particular to a projection display device with a projection screen including a multi-layer reflective film structure, which is suitable for occasions requiring transparent display or high display contrast. Background technique [0002] Transparent display refers to a display technology that can form a transparent display state so that the viewer can see the scene behind it. At present, the commonly used projection display equipment can also realize projection on a transparent medium, such as glass, but due to the impact of the light projected by the glass on the projector It is also transparent, so the image displayed by the projection is relatively dark and the imaging effect is not good. [0003] On the other hand, when a common projection device with a non-transparent display is currently projecting, the common projection screen is easily affected by external natural light, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/60G03B21/20
Inventor 王欢
Owner 徐州奕创光电科技有限公司
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