TW448312B - Microprism automatic stereoscopic display - Google Patents

Abstract

The present invention is a microprism automatic stereoscopic display, which has a light source, an imaging device, a liquid crystal panel, a microprism plate and an optical diffuser plate in the perpendicular direction. The liquid crystal panel shows the image formed by horizontally interlaced image of the parallax between left and right eyes. When the emitted light from the light source passes through the imaging device and the liquid crystal panel, the microprism is used to separate the parallax image between left and right eyes, so that views can watch the three-dimensional image due to parallax principle. Since the microprism plate is formed of microprism arrays with oppositely tilted direction and horizontally interlaced arrangement, and is matched with a light source which is narrower in the vertical direction and an optical diffuser plate in the perpendicular direction, the present invention can effectively avoid the light-leaking problem caused by the movement of the viewer, and it is not necessary to have light source with specific polarization. The intensity of light source will not be reduced.

Description

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V. Description of the invention (1) [Scope of application of the invention The present invention relates to a micro-puppet auto-stereoscopic image display, and in particular to a horizontally-staggered jagged micro-puppet to respond to the movement of the viewer's position without making it Stereoscopic image display that affects the quality of viewing stereoscopic images0 [Background of the invention] A stereoscopic display can image two different perspective images of a scene in the left and right eye areas respectively, and thus use the images of two different perspectives. 'Let the viewer have parallax, making it look like a three-dimensional image. At present, the imaging technology of the stereoscopic image display uses a micrometer to let the light fall on the left and right eye areas of the viewer. As shown in "Figure 1", it is a technology disclosed in US Patent No. 5,772,262, of which The vertical stripe micro ridges 1 3 produced by a machining process are used as a separation plate for stereo images, that is, the light emitted by the light source first passes through different liquid crystal pixels (pixels) in the liquid crystal panel 22. The first liquid crystal day element 11 a of the eye image and the second liquid crystal day element 1 1 b, which specifically displays the left eye image, and then passes through the vertical streaks 1 2 to let the light of the right eye parallax image 1 2 R is separated from the light 12 L of the left-eye parallax image and enters the right-eye view 10R and the left-eye view 10L of the viewer respectively. 'So-the viewer can see 3D without wearing special glasses or headgear. Stereo image. However, because the technology is designed with the viewer's head in the center, if the head is shifted too far to the left or right, it will cause the light of the parallax image of the right eye 2R to deflect to the left of the viewer Eye field of view 10L, middle, and similarly the light of the parallax image of the left eye

Page 4483 1 2 V. Description of the invention (2) ------— 12 \ will instead enter the viewer's right eye field of view 10R, which will cause light leakage in the left and right eyes and cause ghost images. , Which seriously affects the three-dimensional feeling when watching. "," ^ Patent No. 38 1 394 of the Republic of China also discloses a technology that uses a micro retardation plate as a separation plate for left and right eye images. Because the micro retardation plates are staggered in a horizontal direction, it does not There will be cases where the viewer ’s head and / or shift are getting worse, and ghosts become more serious.11 However, this kind of micro-phase phase difference plate made of polymer materials is not easy to handle, and the micro-phase phase difference plate ’s vengeance is different. It varies with wavelength (dispersion phenomenon of phase difference). If the standard phase difference is taken at a specific wavelength (for example, green light of 5500 nm), there will be leakage of light in other colors, so it must be matched with a polarized light source, and Because this method uses the polar state of light to separate the left and right eye images, the brightness of the light source is reduced by half. Relatively, the brightness of the image seen by the viewer will also be reduced. [Objective and Summary of the Invention] There is a clock here. 'The object of the present invention is to design an auto-stereoscopic image display' so that it will not cause light leakage due to the side shift of the head and does not need to cooperate with a specific polarized light source. ' Keep the light source bright. According to the above object, the present invention provides a micro-encapsulation auto-stereoscopic image display, which includes a light source, an imaging device, a liquid crystal panel, a micro-encapsulation plate, and a vertical light diffusion plate. The imaging device can choose a general convex lens, Fresnal The lens, or a cylindrical lens array, is replaced to make a thin micro-automatic stereoscopic image display. After the light emitted from the light emitting area of the light source passes through the lens and the liquid crystal panel, the ‘image displayed by the liquid crystal panel is horizontally interleaved by the parallax images of the left and right eyes.

44831 2 Fifth, the description of the invention (3), so the light includes the right-eye parallax image and the left-eye parallax image, and the micro-plate acts as a light separation plate. It will 'right-eye parallax image and left-eye parallax image The light rays are separated so that they enter the right-eye view and the left-eye view of the viewer respectively, so that the viewer generates parallax and sees the stereoscopic image through the images of two different perspectives. The micro-capsule plate is composed of two micro-capsule arrays with opposite oblique directions. The two micro-capsule arrays are arranged in a horizontal staggered manner, and with a vertically narrow light source and a vertical light diffusion plate, it can effectively avoid The light leakage problem of the left and right eyes caused by the movement of the viewer ’s head does not require the cooperation of a specific polar light source, and the brightness of the light source does not decrease. In order to make the above and other objects, features, and advantages of the present invention more comprehensible, several preferred embodiments are exemplified below, and the following formulas are described in detail in conjunction with the attached formulas. [Explanation of the embodiment of the invention] Please refer to "Fig. 2", which shows a schematic structural diagram of a micro-display auto-stereoscopic image display of the present invention, which includes at least a light source 20, a lens 21,-a liquid crystal panel 22 and一 微 稜鏡 板 23. The light emitted from the light-emitting area of the light source 20 covers the entire area of the lens 21 and the liquid crystal panel 22, because the image displayed by the daylight element (p 丨 xe 丨) of the liquid crystal panel 22 is horizontally staggered by the parallax images of the left and right eyes Therefore, after the light passes through the LCD panel 22, the parallax image of the right eye and the parallax image of the left eye are carried separately; the micro-panel plate 23 plays the role of a light separation plate, which converts the parallax image of the right eye and the left eye described above The light of the parallax image is separated to make it enter the viewer's right-eye view, 10R 'and left-eye view 10L, 10L', respectively.

4483 1 2 V. Description of the invention (4) The image allows the viewer to generate parallax and see the stereoscopic image. The light source 20 described above may be a light emitting diode (LED) array, a high-brightness cathode ray tube (CRT), or a liquid crystal display (LCD) with a backlight; in addition, the 'light source must be able to move and track', that is, it can follow the position of the viewer. Move its glowing part quickly. The above-mentioned lens 21 is used as an imaging device for guiding and guiding the light emitted by the light source 20 to the viewer. Therefore, the relative position of the light source 20 and the lens 21 is related to the lens 21 In addition to the convex lens 21 shown in the figure, this imaging device can also be replaced by a Fresne 1 lens. Please refer to "Fig. 3A". The structure of the microcapsule plate 2 3 in the present invention is to arrange each microcapsule 2 3 3 according to different tilt directions, and divide it into a first microcapsule array 2 3 1 and The second micro-mirror array 2 2 3, the two kinds of micro-mirror arrays 231 and 232 are staggered in the horizontal direction and divided into odd and even columns. The cross-sectional shape of the odd columns is as shown in "Figure 3B" It is shown that the cross-sectional shape of the even-numbered rows is as shown in "Figure 3C", and the cross-sections all show a zigzag shape. In addition, it is matched with the liquid crystal panel 22, so the height of each column of the 稜鏡 array 2 3 1 2 3 2 must be equivalent to the height of the liquid crystal panel. In the "Figure 2", "if there is no micro-plate 23 and vertical light diffusion plate 24", the light-emitting area of the light source 20 will have the same shape and size on the plane of the viewer's position due to the action of the lens 21. In a bright area with a fixed proportion, the viewer can only see the image displayed by the LCD panel 22 at the position of the bright area. After adding the micro-plate 23, the micro-prism plate 2 shown in "Figure 3A" is displayed. 3 Structure. As an example, the

Page 7 ^ 483 1 2 V. Description of the invention (5) Light will be deflected to the right by the micro prism 233, and light 'passing through the second microprism array 232 will be deflected to the left by the microprism 2 3 3, two Each of the two forms a bright area 'appropriately designing the width of the light emitting area 20's light source and the slope of the 稜鏡 2 3 3' to enable the edges of the two bright areas to be connected to each other, and the distance between their center points is approximately equal to the distance between the eyes of a person. At this time, when the viewer ’s left and right eyes are respectively located in these two bright areas, the right eye will only see the image of the LCD panel 22 odd-numbered day pixels, and the left eye will only see the LCD panel 22 even-numbered pixels. If the odd-numbered columns of daylight elements on the LCD panel 22 display parallax images of the right eye and the even-numbered columns of daylight elements display parallax images of the left eye, the viewer can see the stereoscopic image. Since the microcapsule plate 2 3 structure of the present invention is to arrange microcapsule arrays 2 3 1 and 2 3 2 that process parallax images of left and right eyes in a horizontal direction, even if the viewer ’s head moves left and right, for example, the head moves to the left Making the right eye field of view at 10R and the left eye field of view at 10L 'will not affect the quality of the viewer's appreciation of the stereoscopic image.' In addition, in order to match the horizontal staggered arrangement of the microcapsule arrays 2 31, 2 3 2 in the microcapsule plate 23, the vertical width of the light source 20 must be narrow, and the allowable width depends on the distance between the viewer and the liquid crystal panel 22, and The parameters such as the width of the liquid crystal pixels are different, so that the problem of light leakage between the two eyes can be further avoided. After the vertical width of the light source 20 is narrowed, the vertical width of the field of view (the image of the light source 20 light-emitting area on the plane of the viewer's position) will also be narrowed, in order to meet the different needs of the viewer's south. Let the viewer ’s head have some movement space in the vertical direction, so in addition to the microprism plate 23, a vertical light diffusion plate 24 such as a cylindrical lens array is added between the viewer and the viewer.

Page 8 44831 2 V. Description of the invention (6) Column 'Extends the viewing area that the viewer can enjoy in the vertical direction. The horizontally staggered zigzag plate 23 in the present invention cannot be manufactured mechanically due to its special structure and fine structure. Therefore, it can be manufactured by using a gray scale mask lithographic etching process, such as "No. 4 As shown in the figure, a photoresist 41 is coated on a substrate 40 and covered with an appropriate gray scale mask 4 2 for exposure. After development, the photoresist 41 will be formed into a zigzag pattern. The structure of the microplate 2 required by the invention. In addition to the above grayscale mask manufacturing process, the slope of the micro 稜鏡 233 can also be approximated by a multi-step diffractive optical element (mu 11 i-stepdiffractive optical element). Please refer to "Fig. 5". The lens 21 is replaced with a cylindrical lens array 51. Since the focal length of each cylindrical lens in the cylindrical lens array 51 is much smaller than that of the ordinary lens 21, the distance between the liquid crystal panel 22 and the light source 20 can be shortened. Distance, while making a thin micro-automatic stereo image showing crying. In addition, the present invention can use the way of controlling the light source 20 to easily achieve the function of switching between planar / stereoscopic (2D / 3D) images. When a stereoscopic image is to be played, the bright area control of the light source 20 is as shown in FIG. 6A. As shown in the figure, if only the planar image is viewed, the light source 20 can be fully lit, as shown in "Figure 6B". If it is the thin micro-automatic stereoscopic image display shown in "Figure 5", it is also possible to perform local 2D / 3D switching on any area in the light source 20, as shown in "Figure 7", which makes the light emitting area of the stripes be The 3D image light-emitting area 71 is a full-brightness light-emitting area 72. [Effect of the invention]

4483 1 2 V. Description of the invention (Ό ^ ----1. The instrument of the invention & ...... uses a horizontally staggered micro-panel plate as a light separation plate to separate the left 'ginger shirt image, so even the viewer Moving the head to the left and right will not leak light and cause ghosting. 2. The present invention uses a vertically narrow light source to match the horizontally staggered micro-panel. Finally, a vertical light diffusion plate The field of view of the parallax images of the left and right eyes is widened, so there is no problem of light leakage caused by the material's micro phase difference characteristics. 3 The invention does not need to cooperate with a specific polarized light source 'so it does not affect the brightness of the image seen by the light source and the viewer. The invention has been disclosed as above with several preferred embodiments, but it is not intended to limit the invention. Anyone skilled in the art 'can make a few changes and decorations without departing from the spirit and scope of the invention'. Therefore, the invention The scope of protection shall be determined by the scope of the attached patent application.

Page 10 4483 1 2 Brief description of the drawings [Illustration of the drawings] FIG. 1 is a schematic diagram showing a conventional optical path of a stereo image display, FIG. 2 is a schematic diagram showing a structure of the first embodiment of the present invention; Figure A shows the schematic diagram of the structure of the microprism plate of the present invention; Figure 3B shows the cross-sectional shape of the odd-numbered rows of the micro-plates of the present invention, and Figure 3C shows the micro-plates of the present invention Schematic diagram of the cross-sectional shape of even-numbered columns; FIG. 4 is a schematic diagram of a manufacturing process of a micro-pattern plate according to the present invention according to a gray-scale lithographic etching technique; FIG. 5 is a schematic diagram of a structure of a second embodiment of the present invention; Figure A shows the schematic diagram of light source control when the present invention presents 3D images; Figure 6B shows the schematic diagram of light source control when the present invention presents 2D images; and Figure 7 shows the present invention presents partial 2 D / 3 D Schematic diagram of light source control for images. [Illustration of Symbols in the Drawings] 1 0 R, 10 R '.............. Right eye sight 10L, 10L' 11a ·· lib · · 12R, 12R, .... . Left Eye Sight • _ • First LCD Daylight • 'Second LCD Daylight

448312 Schematic description of 12L, 12L '13 The light of the parallax image of the eye: vertical streaks, micro-lights, ... light sources, ..., lenses, ..., LCD panels, ..., micro-mirror array • Second micro-chirped array ... micro-chirples • vertical light diffusion plate ....... substrate ....... photoresist 42 .......... ........ Gray scale mask 51 ...... Cylinder lens array 71 ........ 3 D Image emission area 7 2 .............. 2 D image emission area

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Claims (1)

448312 VI. Scope of patent application 1. A micro-puppet auto-stereoscopic image display, comprising: a light source; an imaging device, which is located on the optical path of the light emitted by the light source, and is used to guide the light of the light source to form an image In the left and right eye sight of one or more viewers, a liquid crystal panel with two different liquid crystal daylights can receive the light guided by the imaging device and present a right-eye parallax image and a left-eye parallax image respectively. And a microcapsule plate having two first microcapsule arrays and a second microcapsule array that are horizontally staggered with each other, the first microcapsule array and the second microcapsule array are jagged, and The direction of the zigzag is opposite, and the light of the right-eye parallax image can be directed to the right-eye field of view of the viewer, and the light of the left-eye parallax image can be directed to the left-eye field of view of the viewer. 2. The microscopic auto-stereoscopic image display as described in item 1 of the scope of patent application, wherein the light source is selected from a light emitting diode (LED) array, a high brightness cathode ray tube (CRT), and a liquid crystal display (LCD). One of the combinations with backlight. 3. The microscopic auto-stereoscopic image display device described in item 1 of the scope of patent application, wherein the light source can quickly move its light-emitting part according to the position of the viewer. 4. The microscopic auto-stereoscopic image display device according to item 1 of the scope of patent application, wherein the light source has a narrow vertical direction and a wide horizontal direction. 5. Micro-automatic image display as described in item 1 of the scope of patent application ’ Page 13 “8312 No mirror plate spot ^ l 3 gold mouth straight direction light diffusion plate 7 m β eye parallax between the two 'to make the parallax image of the right eye and the left :: ί: image's field of view simultaneously in the vertical direction Expand. Note: The microscopic autostereoscopic image described in item 5 of the profit scope is displayed. The vertical light diffusing plate in the figure is a cylindrical lens array. The microscopic auto-stereoscopic image display described in item 1 of the Ming patent range is 8:: = The imaging device is a convex lens. „. The microscopic autostereoscopic image display device described in item 1 of the scope of the patent ', wherein the imaging device is a Fresnel lens. 9, such as 4 in the 3rd patent scope The microscopic autostereoscopic image display device described in item 1 above, wherein the imaging device is a cylindrical lens array. Each of the columns of the microscopic autostereoscopic image display device described in item 1 of the patent application scope. The height of the first micro array and the second micro prism array is approximately the same as the height of the liquid crystal pixel. 1. The micro array auto-stereoscopic image display as described in the first item of the patent application scope, wherein: The odd-numbered columns of the micro-prism plate are all the first micro-array, and the even-numbered columns of the micro-prism plate are the second micro-block array. 1 2. The micro-edges described in item 1 of the scope of patent application Mirror autostereoscopic image display, wherein the odd-numbered columns of the micro-capsule plate are the second micro-capsule array, and the even-numbered columns of the micro-capsule plate are the first micro-capsule array. Page M