TWI446310B - Method of assembling autostereoscopic display - Google Patents

Description

Method for assembling naked-eye stereoscopic display

The present invention relates to a method of assembling a display, and more particularly to a method of assembling a naked eye stereoscopic display.

Three-Dimension (3D) display technology is considered to be the most important research and development direction of the display after high image quality. The stereoscopic image is formed according to the principle of Stereo Vision through the human eyes, that is, the binocular parallax occurs when the human eyes are separated by a distance of about 65 mm. Two eyes see two different two-dimension (2D) images transmitted to the human brain, and combine the two images in the human brain to reproduce the depth and layering of the stereo image. Therefore, according to this principle, in order to display a stereoscopic image on a flat panel display, two sets of mutually interlaced images are provided on the same screen to simulate two-eye vision respectively, and then the two eyes respectively receive two sets of images through polarized glasses or a grating to achieve a stereoscopic image. The effect of the image. However, polarized glasses are inconvenient to use, and thus many naked-eye stereoscopic displays of different designs have been developed, and the two sets of images are directly transmitted to the left and right eyes through optical design.

Usually, the naked eye stereoscopic display (Autostereoscopic Display) uses two technologies to achieve the effect. The first is the optical Grating stereoscopic display technology. The principle is to use the grating to shield the pixels of the left eye image in the flat display from being viewed by the right eye. To, the pixel of the right eye image will be shielded from view by the left eye to achieve stereoscopic effect. For example, parallax barriers, parallax barriers are also divided into electrically driven and non-electrically driven. The electrically driven type is, for example, sandwiched between two mutually perpendicular polarizers by a layer of liquid crystal panels, and is electrically driven to generate an opaque shielding portion of the grating pattern when stereoscopic vision is required. The non-electrically driven type shields light by designing a black matrix in the liquid crystal panel.

The other is a refraction naked-eye stereoscopic display technology, which is based on the principle that the left-eye image pixels are refracted to the left eye and the right-eye image pixels are refracted to the right eye to produce stereoscopic vision. For example, a columnar convex lens (Lenticular) is to place a columnar convex lens array on a flat display, and each convex lens in the array corresponds to a left eye image pixel or a right eye image pixel, and the convex lens is used to refract the left eye image pixel. The left and right eye image pixels are refracted to the right eye. The other is a liquid crystal lens (Liquid Crystal Lens), which additionally uses a liquid crystal lens to refract the left eye image pixel to the left eye through the driving of the liquid crystal layer corresponding to the left eye image pixel or the right eye image pixel. The right eye image is refracted to the right eye.

Nowadays, with the increase of the pixels of the liquid crystal display panel, the distance between the pixels and the pixels is also closer. Therefore, precise alignment of the above-described parallax barrier, columnar convex lens or liquid crystal lens layer with the liquid crystal display panel displaying a two-dimensional picture is particularly important. When the alignment of the assembly is not accurate enough, the effect of the stereoscopic image will be deteriorated, and in severe cases, the stereoscopic image cannot be seen. In addition, when the assembly is completed, it is still impossible to know whether the naked-eye stereoscopic display is good or not, and the detection result of the actual output stereoscopic image is required to know the effect of the combination. Therefore, if the detected naked-eye stereoscopic display is a defective product, it may need to be re-assembled or discarded, resulting in an increase in manufacturing cost.

Therefore, there is a need to propose a method for assembling a naked-eye stereoscopic display to solve the above problems.

In view of the above, an object of the present invention is to provide a method for assembling a naked-eye stereoscopic display, which can further improve the accuracy of the assembly by observing the overlapping pattern, thereby increasing the stereoscopic display effect and reducing the manufacturing cost.

In order to achieve the above and other advantages, the present invention provides a method for assembling a naked-eye stereoscopic display by using the following technical solution: a method for assembling a naked-eye stereoscopic display, wherein the naked-eye stereoscopic display includes at least one display panel and a The stereo image generation layer. The display panel has a plurality of pixels for displaying a two-dimensional image. The stereoscopic image generating layer has a stripe structure for converting the two-dimensional image displayed by the display panel into a volume image; wherein the grouping method comprises: causing the display panel to display a specific two-dimensional image of a stripe pattern having a predetermined pitch; Superimposing the display panel and the stereoscopic image generating layer such that the stripe pattern of the specific two-dimensional image displayed by the display panel overlaps with the stripe structure of the stereoscopic image generating layer; observing the overlapping stripe pattern and the stripe structure A screen is constructed to determine whether the alignment is aligned; and if it is determined that the relative position of the stereoscopic image generation layer to the display panel is not adjusted for the criterion, the two are aligned.

In a preferred embodiment of the present invention, the stereoscopic image generating layer is selected from the group consisting of a black matrix, a parallax barrier, a cylindrical lens, and a liquid crystal lens. The step of adjusting the relative position is to rotate the stereoscopic image generating layer or the display panel.

In a preferred embodiment of the present invention, the display panel further has at least one first alignment mark; the stereoscopic image generation layer further has at least one second alignment mark; wherein the method further comprises first The pair of bit marks are aligned with the second pair of marks, so that the stereoscopic image generating layer is initially aligned and disposed on the display panel.

In a preferred embodiment of the present invention, when viewed from a position at a center of the stereoscopic image generating layer and separated by a specific distance, a pattern is formed according to whether the stripe pattern and the stripe structure form a pattern. The graphic determines whether the display panel is aligned with the stereoscopic image generating layer. When the screen has the overlapping pattern, it is determined that the display panel and the stereoscopic image generating layer are misaligned.

When viewed from a position other than the position of the center of the stereoscopic image generation layer and separated by a specific distance, the stereoscopic image generation layer and the display panel are determined by analyzing the stripe of one of the overlapping pattern displayed on the screen. Whether it is aligned. Wherein the overlay pattern has a layered stripe larger than the predetermined pitch.

In a preferred embodiment of the present invention, the method of viewing is performed at a specific position on the stereoscopic image generating layer by a camera to capture a picture formed by the overlapping stripe pattern and the stripe structure. Wherein the camera sets the specific position on the stereoscopic image generating layer to be directly opposite to and located at a central position of the stereoscopic image generating layer, and the stereoscopic image generating layer is between 10 cm and 500 cm.

Finally, the method further includes: after the stereo image generating layer is precisely aligned with the display panel, bonding the stereoscopic image generating layer to the display panel to complete the assembly.

According to the method for assembling a naked-eye stereoscopic display of the present invention, the overlapping pattern generated by the overlapping of the stereoscopic image generating layer and the display panel displaying the stripe pattern is further accurately assembled, and the problem of inaccuracy of the conventional stereoscopic display assembly is improved.

In order to make the above description of the present invention more comprehensible, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

Figure 1a is a top plan view of a display panel in accordance with a preferred embodiment of the present invention. The display panel 100 is a liquid crystal display panel having an upper and lower glass substrate, and a liquid crystal layer (not shown) is interposed between the upper and lower glass substrates. The display panel 100 has at least one first alignment mark 1001 , for example, one of the four corners of the display panel 100 has a first alignment mark 1001 , and is preferably formed on the display panel 100 . Upper glass substrate. The alignment mark 1001 preferably has a length and width of between 10 micrometers and 50 micrometers. In a preferred embodiment, a cross pattern having a length and width of 20 micrometers is provided to facilitate alignment. The display panel 100 also has a plurality of pixels (not shown) for displaying a two-dimensional image, such as a staggered left-eye pixel pattern and a right-eye pixel pattern.

Figure 1b is a top plan view of a stereoscopic image generating layer in accordance with a preferred embodiment of the present invention. The stripe structure in the stereoscopic image generating layer 200 can be composed of a black matrix barrier, a liquid crystal parallax barrier, a lenticular lens, and a liquid crystal lens. One of the groups. Similarly, the stereoscopic image generation layer 200 has at least one second alignment mark 2001, and three of the four corners of the stereoscopic image generation layer 200 respectively have a second corresponding to the first alignment mark 1001. The alignment mark 2001 is preferably formed on a lower glass substrate (not shown) of the stereoscopic image generation layer 200. The stereoscopic image generating layer 200 is configured to convert the two-dimensional image generated by the display panel 100 into a stereoscopic image. Taking the parallax barrier as an example, the parallax barrier has a liquid crystal layer sandwiched between two upper and lower glass substrates, and a raster-like pattern is formed when the parallax barrier layer is driven. When the stereoscopic image generating layer 200 implemented by the parallax barrier layer is disposed on the display panel 100, the left-eye pixel pattern displayed by the display panel 100 can be shielded from being viewed by the right eye and the right eye image being displayed. The masking of the pixels does not allow the left eye to see to achieve stereoscopic effects.

FIG. 2 is a schematic diagram showing a preliminary alignment of a naked-eye stereoscopic display according to a preferred embodiment of the present invention. First, referring to FIG. 2, the method for assembling the naked-eye stereoscopic display 10 according to a preferred embodiment of the present invention is to apply the first alignment mark 1001 on the display panel 100 to the stereoscopic image generation layer 200. The second alignment marks 2001 are aligned, and the stereoscopic image generation layer 200 is initially aligned on the display panel 100 and disposed on the display panel 100. The first alignment mark 1001 and the second alignment mark 2001 can be observed by a microscope, and the display panel 100 or the stereoscopic image generation layer 200 is moved to make the first alignment mark 1001 and the second alignment mark The image overlap of 2001 reached a preliminary alignment.

The method of assembling the naked-eye stereoscopic display of the present invention provides the following further alignment steps in addition to the preliminary alignment steps described above. FIG. 3a illustrates a stripe pattern displayed on a display panel in accordance with a preferred embodiment of the present invention. Next, referring to FIG. 3a, the pixels on the display panel 100 display a specific two-dimensional image of the stripe pattern 150 having a predetermined pitch d. The stripe pattern 150 is preferably a stripe pattern of black and white and having the same width, wherein the black stripe is indicated by oblique lines, and the predetermined pitch d is preferably between 10 micrometers and 1000 micrometers. The pitch is defined as the distance from the center of one black strip to the center of the adjacent black stripe.

FIG. 3b is a schematic diagram of the stereoscopic image generation layer according to a preferred embodiment of the present invention. Referring to FIG. 3b, the stereoscopic image generation layer 200 of the preferred embodiment of the present invention takes a parallax barrier as an example. After the parallax barrier is driven, the parallax barrier forms a stripe structure 250, that is, a grating. a grating pattern, the strip structure 250 is spaced according to the paintings of the display panel 100 Designed by the prime minister. In the preferred embodiment, the stripe structure 250 is the same as the predetermined pitch d, wherein the opaque portion of the grating pattern is indicated by oblique lines and corresponds to the black stripe portion in FIG. 3a, as shown in FIG. 3b. Show. It should be noted that, in addition to the parallax barrier, the black matrix barrier and the driven liquid crystal lens have a grating pattern like a grating, and the structure of the lenticular lens is optically equivalent to a grating pattern. Therefore, the unity is represented by a stripe structure, and the principles are the same, and will not be described in detail.

FIG. 4 is a schematic diagram showing the assembly of a naked eye stereoscopic display according to a preferred embodiment of the present invention. FIG. 4 illustrates how the relative position of the stereoscopic image generating layer 200 and the display panel 100 is slightly adjusted by observing the image formed by the stripe pattern 150 and the stripe structure of the stereoscopic image generating layer 200, so that the stereoscopic image generating layer is 200 is precisely aligned with the display panel 100. Referring to FIG. 4, the stereoscopic image generating layer 200 and the display panel 100 that are initially aligned are disposed on a rotating platform (not shown). The first computer 410 inputs an image signal to the display panel 100 to generate the stripe pattern 150.

Observing a picture formed by the overlapped stripe pattern 150 and the stripe structure 250 of the stereoscopic image generating layer 200 (for example, a grating pattern formed by a parallax barrier) is disposed at a specific position on the stereoscopic image generating layer 200 by a camera 400. Take this picture. The specific position on the stereoscopic image generating layer 200 is preferably an optimal visual position, which is directly opposite to the central position of the stereoscopic image generating layer 200 and a fixed distance from the stereoscopic image generating layer 200. The distance is preferably from 10 cm to 500 cm. The camera 400 is also coupled to a second computer 420 to analyze the picture. The screen displays a Moire pattern 300, which is shown enlarged in FIG.

FIG. 5 is a schematic view showing a superimposed pattern of a preferred embodiment of the present invention. Please refer to the second As shown in FIG. 5, when the display panel 100 and the stereoscopic image generating layer 200 are initially aligned according to the first alignment mark 1001 and the second alignment marks 2001, there are some slight deviations because they are not precisely aligned. The amount of the stripe pattern 150 generated by the display panel 100 and the stripe structure 250 provided by the stereoscopic image generating layer 200 (for example, a grating pattern formed by the parallax barrier) generates a superimposed pattern 300, which is a pattern of 300 A plurality of strips 310 having a width and a pitch greater than the predetermined pitch d are displayed and distributed over the entire naked-eye stereoscopic display. In this case, the gradation means that the gradation of the stripes in the overlapping pattern is a gradual change. In addition, the stripe pattern 150 and the stripe structure 250 are spaced apart from the upper glass substrate of the display panel 100 and the lower glass substrate of the stereoscopic image generating layer 200. Therefore, the overlay pattern 300 is different depending on the viewing distance and the viewing angle. The number and shape of the gradation strips 310 also change.

It should be noted that if the stereoscopic image generating layer 200 is implemented by, for example, a lenticular lens, the stripe structure formed by the columnar convex lenses arranged in parallel will also generate the overlapping pattern 300 for the stripe pattern 150. In addition, the liquid crystal lens after driving can have the same effect as the columnar convex lens arranged in parallel, and the overlapping pattern 300 can also be generated with the stripe pattern 150.

The stereoscopic image generating layer 200 or the display panel 100 disposed on the rotating platform is finely adjusted, and the overlapping pattern 300 is observed together. Figure 6a is a schematic diagram showing the precise arrangement of a naked eye display according to a preferred embodiment of the present invention. Referring to FIG. 6a, when the stereoscopic image generation layer 200 and the display panel 100 are finely aligned, the captured naked-eye display screen is a completely uniform image, and there is no gradient layer in the above fifth figure. The stripe 310 of the shape indicates that no such overlap pattern 300 is produced.

Figure 6b is a schematic diagram showing the precise arrangement of the naked eye display of another preferred embodiment of the present invention. Referring to FIG. 6b, when the stereoscopic image generation layer 200 and the display panel 100 are fine-tuned When the alignment is accurate, the stripe pattern 150 and the stripe structure 250 do not completely coincide when the stereoscopic image generating layer 200 is accurately aligned with the display panel 100, but have a horizontal offset, which can be optical according to the naked eye display. The effect is to design. In this case, when the picture of the naked eye display is viewed from the best visible position, and when the stereoscopic image generating layer 200 is accurately aligned with the display panel 100, there is also no overlap pattern 300 generated. Therefore, determining whether the stereoscopic image generating layer 200 and the display panel 100 are aligned with another preferred embodiment of the present invention may be determined by the presence or absence of the overlay pattern 300. In another preferred embodiment, only the stereoscopic image generating layer 200 or the display panel 100 is finely tuned to the screen without overlap pattern 300 to complete the alignment of the stereoscopic image generating layer 200 and the display panel 100. In summary, when the camera is disposed at the optimal visual position to capture the overlapping stripe pattern and the stripe structure, the stereo image generating layer 200 can be determined by observing whether or not the overlay pattern 300 is generated on the screen. And whether the display panel 100 has reached a precise alignment.

In addition, when the camera 400 is viewed in a non-optimal visual position, the stereoscopic image generating layer 200 and the display panel 100 are also accurately aligned, and an overlap pattern 300 is also generated. The gradation stripe 310 of 300 determines whether the stereoscopic image generating layer 200 and the display panel 100 are accurately aligned.

Finally, after the stereoscopic image generating layer is precisely aligned with the display panel, the stereoscopic image generating layer 200 is bonded to the display panel 100 to complete the assembly.

FIG. 7 is a flow chart showing a method for assembling a naked-eye stereoscopic display of the present invention. The method of assembly of the present invention can be represented by a flow chart. As shown in the figure, the step of assembling the method includes: performing preliminary alignment by using the first alignment mark 1001 and the second alignment mark 2001 (step S100); rotating the stereoscopic image generation layer 200 or the display panel 100 (step S200); 400: capturing the overlay pattern 300 (step S300); determining whether the captured overlay pattern 300 reaches the standard (step S400), if not up to the standard, then returning to step S200, if the standard is reached, proceeding to step S500; bonding the stereo The image generation layer 200 and the display panel 100 (step S500).

In summary, the method for assembling a naked-eye stereoscopic display of the present invention further accurately assembles the overlapping pattern generated by the overlapping of the stereoscopic image generating layer and the display panel displaying the stripe pattern, and improves the inaccuracy of the conventional stereoscopic display assembly. The problem, and when the assembly is completed, the quality of the naked-eye stereoscopic display can be known, so that the loss caused by poor assembly can be reduced.

While the invention has been described above in terms of the preferred embodiments, the invention is not intended to limit the invention, and the invention may be practiced without departing from the spirit and scope of the invention. The scope of protection of the present invention is therefore defined by the scope of the appended claims.

100. . . Display panel

150. . . Stripe pattern

200. . . Stereo image generation layer

250. . . Stripe structure

300. . . Overlapping pattern

310. . . Gradual stripes

400. . . camera

410. . . First computer

420. . . Second computer

1001. . . First alignment mark

2001. . . Second alignment mark

d. . . Predetermined spacing

S100. . . Preliminary alignment

S200. . . Rotating stereo image generation layer or display panel

S300. . . Camera captures overlapping patterns

S400. . . Determine whether the captured overlay pattern is up to standard

S500. . . Bonded stereo image generation layer and display panel

Figure 1a is a plan view of a display panel in accordance with a preferred embodiment of the present invention.

Figure 1b is a top plan view of a stereoscopic image generating layer in accordance with a preferred embodiment of the present invention.

2 is a schematic view showing a preliminary alignment of a naked-eye stereoscopic display according to a preferred embodiment of the present invention.

Figure 3a is a diagram showing a stripe pattern displayed on a display panel in accordance with a preferred embodiment of the present invention.

FIG. 3b is a schematic diagram showing the stripe structure of the stereoscopic image generating layer according to a preferred embodiment of the present invention.

4 is a schematic view showing the assembly of a naked-eye stereoscopic display according to a preferred embodiment of the present invention.

Figure 5 is a schematic view showing a superimposed pattern of a preferred embodiment of the present invention.

Figure 6a is a schematic diagram showing the precise arrangement of a naked eye display according to a preferred embodiment of the present invention.

FIG. 6b is a schematic diagram showing the precise arrangement of the naked eye display according to another preferred embodiment of the present invention.

Figure 7 is a flow chart showing the method of assembling the naked-eye stereoscopic display of the present invention.

100. . . Display panel

200. . . Stereo image generation layer

300. . . Overlapping pattern

310. . . Gradual stripes

400. . . camera

410. . . First computer

420. . . Second computer

Claims (10)

A method for assembling a naked-eye stereoscopic display, the naked-eye stereoscopic display comprising at least one display panel and a stereoscopic image generating layer, the display panel having a plurality of pixels and configured to display a two-dimensional image, the stereoscopic image generating layer is used to The two-dimensional image displayed on the display panel is converted into a volume image, and a stripe structure is provided. The method includes: causing the display panel to display a stripe pattern having a predetermined pitch; superposing the display panel and the stereo image generating layer The stripe pattern displayed on the display panel is overlapped with the stripe structure of the stereoscopic image generating layer; the overlapped stripe pattern and the stripe structure are observed to determine whether the display panel and the stereoscopic image generating layer are opposite. And if it is determined to be misaligned, the relative position of the stereoscopic image generating layer and the display panel is adjusted to align the two. The display panel has at least one first alignment mark; the stereoscopic image generation layer further has at least one second alignment mark; wherein the method further comprises first The first alignment marks are aligned with the second alignment marks, so that the stereoscopic image generation layer is initially aligned and disposed on the display panel. The method according to claim 1, wherein the stereoscopic image generating layer is selected from the group consisting of a black matrix, a parallax barrier, a cylindrical lens, and a liquid crystal lens. The method of assembling according to claim 1, wherein the step of adjusting the relative position is to rotate the stereoscopic image generating layer or the display panel. The method according to claim 1, wherein when viewed from a position at a center of the stereoscopic image generating layer and separated by a specific distance, the presence or absence of a picture formed by the stripe pattern and the stripe structure is formed. An overlay pattern is used to determine whether the display panel is aligned with the stereo image generating layer. The method of claim 5, wherein when the picture has the overlapping pattern, it is determined that the display panel and the stereoscopic image generating layer are misaligned. The method of assembling according to claim 1, wherein when the position is outside the position of the stereoscopic image generating layer and is separated by a certain distance, one of the overlapping lines displayed by the screen is analyzed. The stripe of the graphic determines whether the stereoscopic image generating layer and the display panel are aligned. The method of assembling according to claim 5, 6 or 7, wherein the overlapping pattern has a layered stripe larger than the predetermined pitch. The method of assembling according to claim 1, wherein the method of observing is performed by a camera on a specific position on the stereoscopic image generating layer to capture a picture formed by the overlapping stripe pattern and the stripe structure. The method of claim 9, wherein the camera sets the specific position on the stereoscopic image generating layer to be directly opposite to the center of the stereoscopic image generating layer, and the distance between the stereo image generating layer and the stereo image generating layer is 10 cm to 500 cm.