CN211047085U

CN211047085U - Laser projection mechanism for improving resolution and brightness

Info

Publication number: CN211047085U
Application number: CN201922455922.2U
Authority: CN
Inventors: 谢德育
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-07-17
Anticipated expiration: 2029-12-30

Abstract

The utility model discloses an improve laser projection mechanism of resolution ratio and luminance still includes the line field deflection subassembly of the common of more than two sets of laser sources and more than two sets of laser sources, laser sources can send some laser, form the projection face after the reflection of line field deflection subassembly more than two sets of laser on the screen, the position of the different lines of corresponding screen when different laser moves on the screen, line field deflection subassembly is used for driving lateral shifting and longitudinal movement on the screen of more than two sets of laser, and the laser of laser sources is controlled to show the pixel colour and the luminance that the projection face corresponds the position when the projection face removes. According to the technical scheme, a part of pictures of the projection surface are respectively formed by more than two groups of laser sources, so that the times of deflection of the line field deflection assembly in one frame of image are greatly reduced, the requirement on the mechanical performance of the deflection assembly is reduced, and the higher resolution of the laser television can be realized. Higher screen brightness and lower laser source power can also be achieved.

Description

Laser projection mechanism for improving resolution and brightness

Technical Field

The utility model relates to a laser television technical field especially relates to a improve laser projection mechanism of resolution ratio and luminance.

Background

The laser television is developed on the basis of the principle of Cathode Ray Tube (CRT) television, and the electron beam is changed into laser beam, because the laser can not be deflected by electric field or magnetic field control, a rotating mirror (called rotating mirror for short) or a reciprocating vibrating mirror (called vibrating mirror for short) is adopted to reflect the laser, so as to complete the scanning of line and field, and the emission intensity of three-color laser is controlled according to the display content and position, so that the display of color image can be realized.

With the improvement of the display resolution, the scheme of a high-definition television (resolution 1920X1080) is not careful, a high-definition picture has 1080 lines, the refresh rate is 50 times/second, 5.4 ten thousand times of scanning is needed every second, when an octahedral prism wheel is used, the octahedral prism wheel can scan 8 times due to 1-circle rotation, so that 5.4 ten thousand times/8 is 6750 revolutions/second, the rotating speed of the rotating mirror is 40.5 ten thousand revolutions/minute, the noise, the manufacture, the precision, the cost, the service life and the like caused by the high rotating speed are difficult to meet the practical conditions of putting on the market, and the realization of higher resolution 4K or 8K is more impossible.

The resolution of 1920X720 achieved by the micro-galvanometer (2D galvanometer) is also substantially limited, so that current high-definition laser televisions use the D L P or L COS schemes, while the D L P (digital optical processing) projected core device DMD (data micromirror device), which is developed by TI (german instruments, usa) and monopolized by international initiatives.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a suitable laser projection mechanism to improve the resolution of the laser television.

In order to achieve the above object, the present invention provides a laser projection mechanism for improving resolution and brightness, further comprising two or more groups of laser sources and a line field deflection assembly shared by the two or more groups of laser sources, where the laser sources can emit point lasers, the two or more groups of lasers form a projection surface on a screen after being reflected by the line field deflection assembly, different lasers correspond to different line positions of the screen when moving on the screen, the line field deflection assembly is configured to drive the two or more groups of lasers to move transversely and longitudinally on the screen, and the lasers of the laser sources are controlled to display pixel colors and brightness of the corresponding positions of the projection surface when moving on the projection surface.

Furthermore, the line field deflection assembly is a two-dimensional scanning galvanometer, the line field deflection assembly is two rotating mirrors, or the line field deflection assembly is a rotating mirror and a galvanometer.

Further, more than two groups of lasers are located at the positions of the upper and lower adjacent rows when moving on the screen.

Further, each group of laser sources comprises three primary color lasers, and laser beams of the three primary color lasers after passing through the optical assembly are converged on one line.

The driving controller is connected with the laser source and the line field deflection assembly, and is used for acquiring image signals, processing the image signals according to the pixel point position of the projection surface where the laser of the laser source is located, and controlling the brightness of the laser of the corresponding color emitted by the laser source.

And further, the driving controller comprises a video signal input interface, is used for storing the video signal and processing the video signal according to the position of the pixel point of the projection surface where the frame of image and the laser of the laser source are positioned after the multi-line image of the video signal is finished, and controls the brightness of the laser of the corresponding color emitted by the laser source.

Further, the laser television screen is further included, and the laser forms a projection surface on the laser television screen.

Further, the laser television screen has a fluorescent substance thereon.

Different from the prior art, the technical scheme forms a part of picture of the projection surface by more than two groups of laser sources together, so that the times of deflection of the line field deflection assembly in a frame of image are greatly reduced, the requirement on the mechanical performance of the deflection assembly is reduced, and higher resolution of the laser television can be realized. Meanwhile, by the multiple groups of laser sources, higher screen brightness and lower laser source power can be realized compared with the original single group of laser sources.

Drawings

Fig. 1 is a schematic structural diagram of a laser projection mechanism according to an embodiment.

Detailed Description

To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.

Referring to fig. 1, the present embodiment provides a laser projection mechanism for improving resolution and brightness, further comprising more than two sets of laser sources 1 and a line field deflection assembly 2 (for example, fig. 1 may be three sets of laser sources) shared by the laser sources, where the laser sources emit point laser, that is, the laser sources are point laser sources, and the laser emitted by one set of laser sources forms a point on an irradiation surface. More than two groups of lasers form a projection surface on the screen 3 after being reflected by the line field deflection assembly, and different lasers correspond to different lines of the screen when moving on the screen, namely different lasers cannot display pixel points on the same line, so that the laser utilization rate is improved. The line field deflection assembly performs line scanning each time, and then performs line scanning after moving the position in the column direction. Of course, a group of laser corresponds to a plurality of rows of pixels when scanning back and forth. In some embodiments, different lasers may correspond to different columns, and the line field deflection unit in this case may be a column field deflection unit, and the embodiment of the column is only to rotate the embodiment of the line by 90 degrees in space, and the following description is given by taking the line as an example. The line field deflection assembly is used for driving more than two groups of lasers to transversely move and longitudinally move on the screen, so that the lasers can be scanned and displayed on the screen. The laser of the laser source is controlled (i.e. controlled by the controller) when the projection surface moves, so as to display the color and brightness of the pixel point at the corresponding position of the projection surface. When the laser passes through the screen to form the projection surface, pixel points are formed firstly, when the laser is swept from the projection surface, the pixel points can be formed at different positions of the projection surface, due to the persistence of vision effect of human eyes, the human eyes can see continuous pixel points formed by the projected laser on the projection surface, and the pixel points form a picture of the projection surface. In order to make the projection surface display a complete picture, the projection surfaces formed by reflecting the laser beams of different laser sources are continuous projection surfaces. Namely, the laser can sweep the whole projection surface, and the pixel point on the projection surface can display the pixel point of a complete picture. This sample utility model discloses a laser source more than two sets of, its light constitutes a complete picture after the reflection, can not have the condition of disconnection in the middle of the picture to can be used for display picture or image. By the multiple groups of laser sources, the deflection frequency of the line field deflection assembly can be reduced relative to the original group of laser sources under the same resolution, and the mechanical performance requirement of the line field deflection assembly can be reduced. In the line field deflection assembly with the same mechanical property, a plurality of groups of laser sources can form higher resolution, and the resolution of an image can be greatly improved. And through a plurality of groups of laser sources, compared with the original group of laser sources, the power of the laser sources required by the same brightness of the picture can be reduced. If the power of the laser sources is kept unchanged, higher picture brightness can be realized through multiple groups of laser sources.

The line field deflection assembly can be a two-dimensional scanning galvanometer, the two-dimensional scanning galvanometer comprises deflection which is vertical to each other, and under the control of the controller, the line field deflection assembly can move left and right and move up and down on a screen after laser is reflected. The line field deflection component can also adopt two one-dimensional components (rotating mirrors or vibrating mirrors), for example, the line field deflection component is two rotating mirrors or the line field deflection component is a rotating mirror and a vibrating mirror. The laser forms a projection surface after being reflected by the rotating mirror or the vibrating mirror.

The utility model discloses do not restrict the position that laser place line when moving on the screen, preferably, laser is located adjacent line position when moving on the screen. In the column embodiment, the laser may also be in an adjacent column. In the four-group laser source embodiment, the four groups of lasers can also be positioned at four vertexes of the square, and are respectively positioned at two adjacent rows and two adjacent columns. As shown in fig. 1, the distance between the lasers on the screen is the distance between adjacent pixels, and the display control is facilitated by using the adjacent lasers. In this embodiment, the laser spacing is actually very small, and in fig. 1, for the convenience of distinguishing the laser, a laser with a larger angle is used.

In order to achieve that the laser sources can display different colors, each group of laser sources comprises three primary color lasers, which can be red, green and blue, as shown in fig. 1, and the laser light of the primary color lasers is in a line after being refracted by an optical component, such as (prism 4). In order to facilitate the possibility of placing the projection means within the device, it is sometimes necessary to change the laser path, in which case the laser light may also be reflected by means of a mirror 40. The display time of each color laser source of the red, green and blue laser is controlled by the driving controller, so that the laser colors and the intensities of different laser sources can be mixed, and pictures with different colors can be displayed after laser projection.

In order to realize the display and the control of the image signal, the device further comprises a driving controller 5, wherein the driving controller is connected with the laser source and the line field deflection assembly, and is used for acquiring the image signal, processing the image signal according to the pixel point position of the projection surface where the laser of the laser source is positioned, and controlling the laser source to emit the laser with corresponding color and brightness. In order to realize the acquisition and display of the video signal, the driving controller comprises a video signal input interface, and is used for storing the video signal, processing the video signal according to the position of the pixel point of the projection surface where the frame of image and the laser of the laser source are positioned after the multi-line image of the video signal is finished, and controlling the laser source to emit the laser with the corresponding color and the brightness. The laser source of the present invention is a multi-line scanning mode, and preferably starts displaying after buffering multiple lines of the video signal.

In some embodiments, in order to realize projection of laser television, a laser television screen 3 is also included, and the laser scans on the laser television screen (or white wall) to form a projection surface. Fluorescent substances can be added on the screen, and the screen has short afterglow, so that the watching brightness of the screen can be greatly improved.

It should be noted that, although the above embodiments have been described herein, the scope of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, the changes and modifications of the embodiments described herein, or the equivalent structure or equivalent process changes made by the contents of the specification and the drawings of the present invention, directly or indirectly apply the above technical solutions to other related technical fields, all included in the scope of the present invention.

Claims

1. A laser projection mechanism for improving resolution and brightness is characterized in that: the laser scanning device comprises a screen, a line field deflection assembly and a laser source, wherein the screen is provided with a plurality of lines, the line field deflection assembly is used for driving the two or more lines of laser to move transversely and longitudinally on the screen, and the laser source is controlled to display the color and the brightness of pixel points at the corresponding positions of the projection surface when the projection surface moves.

2. A laser projection mechanism with improved resolution and brightness as claimed in claim 1, wherein: the line field deflection component is a two-dimensional scanning galvanometer, the line field deflection component is two rotating mirrors or the line field deflection component is a rotating mirror and a galvanometer.

3. A laser projection mechanism with improved resolution and brightness as claimed in claim 1, wherein: more than two groups of lasers are positioned at the upper and lower adjacent row positions when moving on the screen.

4. A laser projection mechanism with improved resolution and brightness as claimed in claim 1, wherein: each group of laser sources comprises three primary color lasers, and the lasers of the three primary color lasers are converged on one line after passing through the optical assembly.

5. A laser projection mechanism with improved resolution and brightness as claimed in claim 1, wherein: the driving controller is connected with the laser source and the line field deflection assembly.

6. A laser projection mechanism with improved resolution and brightness as claimed in claim 5, wherein: the driving controller comprises a video signal input interface.

7. A laser projection mechanism with improved resolution and brightness as claimed in claim 1, wherein: the laser television comprises a laser television screen, wherein the laser forms a projection surface on the laser television screen.

8. A laser projection mechanism with improved resolution and brightness as claimed in claim 1, wherein: the laser television screen has a fluorescent substance thereon.