CN203037983U - Dynamic diffraction image projection device - Google Patents

Abstract

The utility model provides a developments diffraction formula image projection arrangement, it includes: a first laser source, a second laser source, a third laser source, a first dynamic diffraction element, a second dynamic diffraction element, a third dynamic diffraction element, a controller and a light coupling element. The first, second and third color beams provided by the first, second and third laser sources respectively generate pixels corresponding to a specific spatial position of an image frame when the first, second and third dynamic diffraction elements are modulated by real-time signals of the controller to generate dynamic diffraction grating distribution, and are coupled to the corresponding specific spatial position by the light coupling element. After the dynamic diffraction element is rapidly switched and played, the dynamic diffraction element can be scanned and projected to form a two-dimensional full-color image picture.

Description

Dynamic diffraction image projection device

technical field

The utility model relates to an image projection device, in particular to a dynamic diffraction image projection device. the

Background technique

Laser has superior properties such as high intensity, narrow bandwidth, and concentrated beam. It can provide high brightness, high color saturation, and high-resolution image projection. It is actually the best choice for the light source of image projection devices. Devices have become a display technology trend. the

FIG. 1 is a plan view of a known laser microprojection device. In FIG. 1 , a laser micro projection device includes: three laser light sources 411 , 412 , 413 , two beam splitters 421 , 422 and a micro scanning mirror 43 . The three laser light sources respectively provide a first color beam B411 , a second color beam B412 and a third color beam B413 . The first color beam B411 passes through the two beam splitters 421 and 422, the second color beam B412 is reflected by the beam splitter 421 and passes through the beam splitter 422, the third color beam B413 is reflected by the beam splitter 422, and the three converge into a collimated mixed beam , incident on the micro-scanning mirror 43, the scanning projection of the micro-scanning mirror 43 presents an image on a screen (not shown in the figure). the

But the micro-scanning mirror 43, the key component of the above-mentioned known laser micro-projection device, is a high-precision micro-electromechanical system (Microelectromechanical Systems, MEMS), the process is difficult, and the price is expensive, so that the laser micro-projection device is not easy to popularize, and there are improvements. necessary. the

Utility model content

The main purpose of this utility model is to provide a dynamic diffraction image projection device, so that when the laser beam passes through the dynamic diffraction element of the utility model, a two-dimensional dynamic diffraction pattern can be directly generated to replace the scanning through the micro-scanning mirror. Projection A known technique for producing two-dimensional moving images. the

According to a technical feature of the utility model, the utility model provides a dynamic diffraction image projection device, which includes: a first laser light source, providing a first color light beam, and the first color light beam has a first light intensity ; A second laser light source provides a second color light beam, and the second color light beam has a second light intensity; a third laser light source provides a third color light beam, and the third color light beam has a third light intensity ; a first dynamic diffraction element, corresponding to the first laser light source, to receive the first color light beam; a second dynamic diffraction element, corresponding to the second laser light source, to receive the second color light beam; a third dynamic around a radiation element, corresponding to the third laser light source, to receive the third color light beam; a controller, connected to the first, second and third laser light source, to dynamically adjust the first, second and third light intensity, and Connected to the first, second and third dynamic diffraction elements to control the first, second and third dynamic diffraction elements for real-time signal modulation to generate dynamic diffraction grating distribution, so that the first, second and third When the third color light beam passes through the first, second and third dynamic diffraction elements, pixels corresponding to a specific spatial position of an image frame are generated; and a light coupling element makes the first, second and third The light beams of three colors respectively pass through the first, second and third dynamic diffraction elements and couple to corresponding specific spatial positions. The controller can quickly switch and play the first, second and third dynamic diffraction elements, and can scan and project to form a two-dimensional full-color image. the

According to another technical feature of the utility model, the utility model provides a dynamic diffraction image projection device, which includes: a first laser light source, providing a first color light beam, and the first color light beam has a first light beam Intensity; a second laser light source provides a second color light beam, and the second color light beam has a second light intensity; a third laser light source provides a third color light beam, and the third color light beam has a third light Intensity; a light coupling element, receiving the first, second and third color light beams, so that the first, second and third color light beams are coupled into a collimated mixed light beam; a dynamic diffraction element, receiving the collimated mixed light beams light beam; and a controller, connected to the first, second and third laser light sources, to dynamically adjust the first, second and third light intensity, and connected to the dynamic diffraction element, to control the dynamic diffraction The element performs real-time signal modulation of the distribution of the dynamic diffraction grating, so that the collimated mixed light beam generates pixels corresponding to a specific spatial position of an image frame after passing through the dynamic diffraction element. And quickly switch and play the dynamic diffraction elements, which can be scanned and projected to form a two-dimensional full-color image screen. the

Description of drawings

In order to achieve the above-mentioned purpose and effect, the technical means and the structure thereof adopted in the utility model are described in detail below in conjunction with the accompanying drawings and preferred embodiments as follows, wherein:

FIG. 1 is a plan view of a known laser microprojection device. the

Fig. 2 (A) is the schematic diagram of a preferred embodiment of the utility model. the

FIG. 2(B) is a schematic diagram of displaying an image on the screen by the dynamic diffraction image projection device of the present invention. the

Fig. 3 is a schematic diagram of another preferred embodiment of the present invention. the

Fig. 4 is a schematic perspective view of another preferred embodiment of the present invention. the

Detailed ways

Please refer to FIG. 2(A), which is a schematic diagram of a dynamic diffraction image projection device according to a preferred embodiment of the present invention. As shown in Fig. 2 (A), this dynamic diffraction image projection device comprises: a first laser (laser) light source 111, a second laser light source 112, a third laser light source 113, a first dynamic diffraction element (diffractive optical element) 121, a second dynamic diffractive element 122, a third dynamic diffractive element 123, a controller 13 and a light coupling element (combiner) 14. the

The aforementioned first laser light source 111, the second laser light source 112 and the third laser light source 113 are preferably arranged at positions where the light source outputs are perpendicular to each other, the first laser light source 111 provides a first color light beam B111, and the first The color light beam B111 has a first light intensity; the second laser light source 112 provides a second color light beam B112, and the second color light beam B112 has a second light intensity; the third laser light source 113 provides a third color light beam B113, And the third color light beam B113 has a third light intensity. In this embodiment, the first color beam B111 is preferably a red beam, the second color beam B112 is preferably a green beam, and the third color beam B113 is preferably a blue beam. the

The aforementioned first dynamic diffraction element 121 is arranged at the light source output position of the first laser light source 111 to receive the first color light beam B111 corresponding to the first laser light source 111; the aforementioned second dynamic diffraction element 122 is arranged at The light source output position of the second laser light source 112 is to receive the second color light beam B112 corresponding to the second laser light source 112; the aforementioned third dynamic diffraction element 123 is arranged at the light source output position of the third laser light source 113 , to receive the third color light beam B113 corresponding to the third laser light source 113 . In this embodiment, the first, second and third dynamic diffraction elements 121, 122, 123 are preferably spatial light modulators (Spatial Light Modulator), or dynamic gratings (Dynamic grating). the

The aforementioned controller 13 is connected to the first, second and third laser light sources 111, 112, 113 to dynamically adjust their first, second and third light intensities respectively, and is connected to the first, second and third laser light sources. Three dynamic diffraction elements 121, 122, 123 are used to respectively control the first, second and third dynamic diffraction elements 121, 122, 123 for real-time signal modulation of dynamic diffraction grating distribution. When the second and third color light beams B111 , B112 , B113 pass through the first, second and third dynamic diffraction elements 121 , 122 , 123 respectively, pixels corresponding to specific spatial positions of an image frame are generated. the

The above-mentioned light coupling element 14 is preferably arranged at a position surrounded by the first dynamic diffraction element 121, the second dynamic diffraction element 122 and the third dynamic diffraction element 123, so that the first, second and third color light beams After passing through the first, second and third dynamic diffraction elements, they are para-coupled to corresponding specific spatial positions, so as to present full-color pixel images on a screen 51 . In this embodiment, the light coupling element 14 is preferably an X prism. And the controller 13 quickly switches and plays the first, second and third dynamic diffraction elements 121 , 122 , 123 so as to form a two-dimensional full-color image frame by scanning projection on a screen 51 . As shown in Figure 2 (B), it is a schematic diagram of displaying an image on the screen 51 with the dynamic diffraction image projection device of the present invention, wherein, at time t1, the controller 13 controls the first, second and third Laser light sources 111, 112, 113 emit red, green and blue light beams B111, B112, B113 with first, second and third light intensities respectively, which pass through first, second and third dynamic diffraction elements 121, 122, 123 and the light coupling element 14 generate the pixel P (1, 1) corresponding to the position of an image frame (1, 1); at time t2, the controller 13 controls the red, green and blue light beams to pass through the first 1. After the second and third dynamic diffraction elements 121, 122, 123 and the light coupling element 14 generate the pixel P (1, 2) corresponding to the position of the image frame (1, 2); at time t3, the controller 13 Control the red, green and blue light beams to generate the pixel P corresponding to the position of the image frame (1, 3) after passing through the first, second and third dynamic diffraction elements 121, 122, 123 and the light coupling element 14 (1, 3); and when a line of pixels of the image frame is generated, the next line of pixels is continuously generated until the pixels of the entire image frame are generated. the

Please refer to FIG. 3 , which is a schematic diagram of a dynamic diffraction image projection device according to another preferred embodiment of the present invention. As shown in Figure 3, the dynamic diffraction image projection device includes: a first laser light source 211, a second laser light source 212, a third laser light source 213, a light coupling element 24, a dynamic diffraction element 22 and a controller 23 . the

The aforementioned first laser light source 211, the second laser light source 212 and the third laser light source 213 are preferably arranged so that their light source outputs are parallel to each other, the first laser light source 211 provides a first color light beam B211, and the first The color light beam B211 has a first light intensity; the second laser light source 212 provides a second color light beam B212, and the second color light beam B212 has a second light intensity; the third laser light source 213 provides a third color light beam B213, and The third color light beam B213 has a third light intensity. In this embodiment, the first color beam B211 is preferably a red beam, the second color beam B212 is preferably a green beam, and the third color beam B213 is preferably a blue beam. the

The aforementioned light coupling element 24 is arranged at the light source output positions of the first laser light source 111, the second laser light source 212 and the third laser light source 213 to receive the first, second and third color light beams B211, B212, B213 , so that the first, second and third color beams B211 , B212 , B213 are coupled into a collimated mixed beam B2 , and the collimated mixed beam B2 is received by the dynamic diffraction element 22 . In this embodiment, the dynamic diffraction element 22 is preferably a spatial light modulator, or a dynamic grating. the

The aforementioned controller 23 is connected to the first, second and third laser light sources 211, 212, 213 to dynamically adjust the first, second and third light intensities, and is connected to the dynamic diffraction element 22 to control dynamic diffraction The element 22 performs real-time signal modulation of the dynamic diffraction grating distribution to make it present a dynamic diffraction grating distribution, so that the collimated mixed beam B2 generates pixels corresponding to a specific spatial position of an image frame after passing through the dynamic diffraction element 22, The controller 23 quickly switches and plays the dynamic diffractive element 22 to scan and project to form a two-dimensional full-color image frame, and present the image on the screen 51 . The image displayed on the screen 51 by the dynamic diffraction image projection device of the present utility model is also shown in FIG. 212, 213 emit red, green and blue light beams B211, B212, B213 with the first, second and third light intensities respectively, which are generated corresponding to an image frame after passing through the light coupling element 24 and the dynamic diffraction element 22 The pixel P(1,1) at the position (1,1); at time t2, the controller 13 controls the red, green and blue light beams to generate corresponding image frames after passing through the light coupling element 24 and the dynamic diffraction element 22 The pixel P (1, 2) at the position (1, 2); at time t3, the controller 13 controls the red, green and blue light beams to generate corresponding image frames after passing through the light coupling element 24 and the dynamic diffraction element 22 The pixel P(1, 3) at the position (1, 3); and after a line of pixels of the image frame is generated, the next line of pixels is continuously generated until the pixels of the entire image frame are generated . the

Please refer to FIG. 4, which is a three-dimensional schematic diagram of a dynamic diffraction image projection device according to another preferred embodiment of the present invention. As shown in FIG. 4 , the dynamic diffraction image projection device includes: a light source module 31 , a hologram group 32 and a player 33 . the

The aforementioned light source module 31 provides a collimated light beam L31. In this embodiment, the light source module 31 also includes: three laser light sources 311, 312, 313, respectively providing red, blue and green beams; and a light coupling element 314, so that the red, blue and green beams are coupled into the Collimated light beam L31. the

The aforementioned hologram group 32 has a plurality of diffraction elements such as holograms 321 connected in series, and the holograms 321 all have a static diffraction grating distribution, so that the collimated light beam L31 passes through the holograms. After 321, a static diffraction pattern is generated. the

The player 33 is used to quickly play the hologram group 32 to make the static diffraction pattern generated by the hologram 321 appear as a dynamic image. the

As can be seen from the above description, the utility model adopts a dynamic diffraction element to replace the traditional micro-scanning mirror, and designs a dynamic diffraction image projection device capable of producing two-dimensional dynamic images, which has the advantages of simple process and low price. . the

The above-mentioned embodiment is only an example for convenience of description, and the scope of rights claimed by the utility model is subject to the scope of the patent application, and is not limited to the above-mentioned embodiment. the

Claims (9)

1. A dynamic diffraction image projection device, characterized in that it comprises: A first laser light source, providing a first color light beam, the first color light beam has a first light intensity; A second laser light source, providing a second color light beam, the second color light beam has a second light intensity; A third laser light source, providing a third color light beam, the third color light beam has a third light intensity; A first dynamic diffraction element, corresponding to the first laser light source, to receive the first color light beam; A second dynamic diffraction element, corresponding to the second laser light source, to receive the second color light beam; A third dynamic diffraction element, corresponding to the third laser light source, to receive the third color light beam; A controller, connected to the first, second and third laser light sources, to dynamically adjust the first, second and third light intensity, and connected to the first, second and third dynamic diffraction elements , to respectively control the first, second and third dynamic diffraction elements for real-time signal modulation to generate a dynamic diffraction grating distribution, so that the first, second and third color light beams pass through the first and second color beams respectively and the third dynamic diffraction element generate pixels corresponding to a specific spatial position of an image frame; and A light coupling element, so that the first, second, and third color light beams are coupled to the corresponding specific spatial positions after passing through the first, second, and third dynamic diffraction elements, respectively, Wherein, the controller performs fast switching and playing of the first, second and third dynamic diffraction elements, and scans and projects to form a two-dimensional full-color image frame. the 2. The dynamic diffraction image projection device according to claim 1, wherein the first color light beam is a red light beam, the second color light beam is a green light beam, and the third color light beam is a blue light beam . the 3. The dynamic diffraction image projection device according to claim 1, wherein each of the first, second and third dynamic diffraction elements is a spatial light modulator. the 4. The dynamic diffraction image projection device as claimed in claim 1, wherein each of the first, second and third dynamic diffraction elements is a dynamic grating. the 5. The dynamic diffraction image projection device as claimed in claim 1, wherein the light coupling element is an X prism. the 6. A dynamic diffraction image projection device, characterized in that it comprises: A first laser light source, providing a first color light beam, the first color light beam has a first light intensity; A second laser light source, providing a second color light beam, the second color light beam has a second light intensity; A third laser light source, providing a third color light beam, the third color light beam has a third light intensity; A light coupling element for receiving the first, second and third color light beams, so that the first, second and third color light beams are coupled into a collimated mixed light beam; a dynamic diffraction element receiving the collimated mixed beam; and A controller connected to the first, second and third laser light sources to dynamically adjust the first, second and third light intensity, and connected to the dynamic diffraction element to control the dynamic diffraction element Real-time signal modulation of dynamic diffraction grating distribution, so that the collimated mixed light beam will generate pixels corresponding to a specific spatial position of an image frame after passing through the dynamic diffraction element, and quickly switch the dynamic diffraction element Play, and form a two-dimensional full-color image screen with scanning projection. the 7. The dynamic diffraction image projection device according to claim 6, wherein the first color light beam is a red light beam, the second color light beam is a green light beam, and the third color light beam is a blue light beam . the 8. The dynamic diffraction image projection device as claimed in claim 6, wherein the dynamic diffraction element is a spatial light modulator. the 9. The dynamic diffraction image projection device as claimed in claim 6, wherein the dynamic diffraction element is a dynamic grating. the

Images