TW200422765A - Projection system with the capability of projecting two images simultaneously - Google Patents

Abstract

The present invention provides a projection system with the capability of projecting two images simultaneously or projecting a screen with a larger area under the same projecting distance. Particularly, it utilizes the persistence effect of human vision, the fast response speed of each pixel of the display panel, a pair of image switch reflective mirrors mounted on the optical engine lens (one is still and one is rotating), and other accessory reflective mirror sets to make the image on the display panel to be displayed and switched between left and right on the screen via the switching effect of the reflective mirrors in front of the lens. Due to the persistence effect of human vision, if the switching speed of the screen is fast enough, two screens can be combined into one screen in the sense of human eyes. Therefore, it is able to obtain a double-sized projecting screen without changing the projecting distance. Furthermore, it is able to make the total number of pixels of the projected screen twice of the display panel, that is, to achieve the high-resolution image quality with a low-resolution display panel.

Description

200422765

FIELD OF THE INVENTION The present invention relates to a temporary display effect of projection display, and cooperates with a display surface and an additional movement in front of an optical engine lens to project two independent daylight surfaces. [Background and purpose of the invention] — currently known projection display "Technical TV" can only be projected one time at a time, always using an electronic method under a certain total pixels, only one of them. Next, it is impossible to project an unrestricted backward expansion of a large daytime display. The system ’s principle is to use the fast response speed of each pixel of the human vision board to the reflective lens-a stationary, one-turn projection system. No matter whether it is a front projector or a rear projection daylight surface, to meet the requirements of multiple images, the quality and resolution of the daylight surface is sacrificed, and the large daylight surface is cut into several small images. If it does not become larger, the projection must be displayed with a larger lens angle at a distance of. But after all, space is limited and projection; the opening angle of the lens cannot be unlimited

^ f The purpose of the invention is to improve the situation and achieve a projection area and resolution that are twice that of traditional projection systems under the condition that the projection distance is not changed, the Yanxu head is unchanged, and the size of the display panel is not changed. In other words, to achieve the same resolution of the shirt image, only a half-resolution display panel using conventional projection technology is needed, so it has a high price competitive advantage. [Inventive Features] To achieve the above object, the present invention mainly provides an optical projection architecture including two single-gun projectors and an image switching mirror group. The image switching mirror group includes an image switching mirror lens group and its matching

200422765

The combined reflection 4 films; the image cutting lens and a rotating reflection lens. The image produced by the device is switched by the lens cast group, so that the screen can obtain two independent images when the device response rate on the screen is about fast. [Detailed Description of the Invention] Please refer to the first figure. The first picture is the use case. The projector 1 a will change the relationship of the shadow structure. The viewer once changes the reflection lens group 0 to include a still inverse structure, so that the same group of images can be modulated. With the image adjustment, the projection distance can be kept constant. Currently, an image using a single-gun projector is currently projected onto the screen 23a. Since the projection can only be viewed by a projector, the second picture is an optical projection system of the present invention that can simultaneously project two pictures or project a larger area picture at the same projection distance, which includes a projector 1. A main image switching mirror group 2, a pair of image switching mirror group 3. The main image switching mirror group 2 includes a rotating mirror 22 and a fixed mirror 21; the sub image switching mirror group includes a first large mirror 31 and a second large mirror 32. In the rotating mirror 22, a part is a light transmitting area 222 and a part is a reflecting lens area 221. See the third figure. After the image is projected from the image modulation device 13 through the lens 11, the image is switched between the first screen display area 51 and the second daytime display area 52. The daytime image of the first screen display area 51 is shot from the lens and passes through the light-transmitting area 222 of the rotating mirror 22 toward the fixed mirror 21. After the image is reflected by the fixed mirror 21, it passes through the first The reflections from the two large mirrors 32 are projected onto the first picture display area 51. At this time, the second screen display area has no shadow.

Page 5 200422765 V. Description of the invention (3) The image appears. See the fourth figure. The image of the second screen display area 51 is an image projected from the lens 11 and then reflected by the reflection lens 2 2 1 of the rotating mirror 22, and the reflected image is reflected by the first large mirror 31 in the first direction. Second screen display area. Since the reflection lens 2 2 2 of the reflecting mirror 22 is shielded from the light reaching the first screen display area 51, when there is an image display in the second screen display area, there is no image display in the first screen display area. In order to make the image viewed without afterimage or discontinuity, there must be

Two important items cooperate. First, the response speed of the image modulation of the image modulation device 13 must be fast enough. The so-called response speed of image modulation, taking a liquid crystal projection display as an example, is generally about 16 ms, but to achieve the image switching rate required by the present invention, the response rate should be further reduced by half, that is, 8 ms. That is, to use the same set of image modulation devices to achieve dual image display. In the first 0 ~ 8ms, the image modulation device processes the picture of the first screen display area, and 8 ~ 16ms: to process the second day of the day display area. Day surface. Second, the moving speed of the rotating mirror must be fast enough, and its switching pattern must be compatible with the modulation speed of the modulation device. Taking the rotating mirror shown in the fifth figure as an example, it can be worn through one revolution and six frames in total. If the image modulation device per second needs to process 12 °,

On the 8th day of the day, according to the fifth picture, it must have a rotation force per second: 来看 According to the second picture, each of its four rotations can penetrate and reflect four frames. Capable of 30 rpm. See Figure 7. The seventh picture is joined with the second picture display area 52. For this purpose, the following items must be coordinated to make the first picture display area 51 of the first picture together 'into a single image. To achieve • 第 —, adjust the main image to switch reflections

200422765

^ Group 2 and Tian) J The angle j at which the mirrors switch mirrors 3 to each other, so that D in the first-day display area and D in the second screen display area can be joined: To make the size of the two sides of the picture equal, the projection distance between the projection area of the second plane and the display area of the second screen should be the same, that is, 0 + 8 + 8 + 6. = 0 eight ’+ eight 1, +6 ,. . Chu-^ .4; ^ ^. W D L. Secondly, to ensure that the daylight surfaces on both sides are not skewed, the optical axis projected onto the screen should be perpendicular to the screen. Fourth, the electronic f-form is used to divide the amount of displayed data on the same diurnal surface into two, that is, the amount of diurnal data displayed during the first 8ms is not equal to the amount of the diurnal data.

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Because the response speed of the image modulating device is fast enough and the rotation speed of the main image mirror switching module is fast enough, the phenomenon of visual persistence of the human eye can be exerted to achieve the purpose of image reproduction. This design has the following advantages: (1) the resolution of the overall picture is twice the resolution of the image modulation device: if the resolution of the overall day surface is 1 280 X 720, the resolution of the image modulation device Just 64〇720. Therefore, it can use 1/2 of the area of the original image modulation device to meet the original resolution requirements. This can greatly reduce the price of the projection display. Because the components of the projection display, the unit price of the image modulation device is the highest, which has a great impact on reducing the cost of the display. (2) A picture of the same area can be achieved at a half of the projection distance. So you can drop

Low lens design difficulty. In the rear projection TV, the thickness of the TV can be greatly reduced.

Page 7 200422765 Brief description of the drawings " " ^ The first picture is a conventional system rack diagram. FIG. = FIG. 1 is a system architecture diagram of the first embodiment of the present invention. The second and fourth figures are the first embodiment of the present invention, and the fifth figure is one of the rotating mirrors of the present invention. Illustration of bang, 'Tian. The sixth figure is the second of the rotating mirror of the present invention. The seventh figure is a system architecture diagram of the second embodiment of the present invention. [Contents of drawing number] 〔Knowledge〕 1 a optical engine (or projector or image projection device) 11 a projection lens 1 2 a combined light 1 3 a image modulation device 2 a rear projection TV external light path 21a One reflecting lens 22a, second reflecting lens 23a, screen 3a, projecting daylight surface A 3 1 a, projecting dayline centerline 3 1a, right projection image 32a, left projection image [the present invention] 1 optical engine (or projector, or image projection device) 200422765 Brief description of the diagram 11 Projection lens 1 2 Combined light 1 3 Image modulation device 2 Main image switching mirror group 2 1 Fixed mirror 22 Rotating mirror 221 Reflecting lens 222 Light transmission area 223 Rotation axis 3 pairs of images Switching Mirror Group 3 1 First Large Mirror 3 2 Second Large Mirror 4 Screen 5 Projection Screen A 5 1 Projection Dayline Centerline 5 1 First Daytime Display Area 52 Second Screen Display Area

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Claims (1)

200422765 VI. Application Patent Scope 1. An optical projection system capable of simultaneously projecting two independent daylight surfaces, including: An image projection device, such as a general optical projection engine or a front projector, should have at least one image modulation device and A lens; an image switching mirror lens group, including a rotating mirror and a fixed mirror; the rotating mirror is between the fixed mirror and the lens; the rotating mirror system provides a mechanism for beam penetration or reflection; a fixed mirror Simply reflect the light beam; an image switching mirror lens group includes a first large mirror and a second large mirror, the first large mirror is located in the direction of the reflected beam of the rotating mirror and the second large mirror is located In the direction of the reflected beam of the fixed mirror, two independent images are projected on the screen by the first large mirror and the second large mirror. 2. An optical projection system capable of simultaneously projecting two independent daylight surfaces as described in item 1 of the scope of the patent application. A series of images generated by the image modulation device are projected through the lens. 3. As described in Item 1 of the scope of the patent application, an optical projection system capable of simultaneously projecting two independent daylight surfaces, the image modulation device must meet the response speed of the modulated image and make the visual retention phenomenon of the human eye effective. The time requirements of the role. 4. An optical projection system capable of simultaneously projecting two independent pictures, as described in item 1 of the scope of the patent application, rotating the mirror and a fixed mirror to reflect the image in different directions; One of these can simultaneously project two independent Page 10 200422765 VI. The scope of patent application for an optical projection system with a vertical frame. The number of revolutions per second of a rotating mirror must have a specific relationship with the response speed of a modulated image like a modulation device. Ocular vision persists and needs time to function effectively. 〇 An optical projection system capable of simultaneously projecting two independent images as described in item 1 of the scope of patent application, and the edges of two independent images can be joined together to form a single image. 7. An optical projection system capable of simultaneously projecting two independent pictures as described in item 1 of the scope of the patent application, wherein the structure of the rotating mirror is a symmetrical structure composed of a reflective lens and a light-transmitting area. The total area is approximately equivalent to the area occupied by the light-transmitting area. 8 As described in Item 1 of the declared patent scope, an optical projection system that can simultaneously project two independent pictures. To obtain two independent iL images of the same size and separated from each other, the two diurnal planes are projected from the lens. The optical path must be the same, and the incident angle of the image projected onto the screen must be the same.