TWI526717B - Naked eye stereoscopic display device and method for arranging pixel thereof - Google Patents

Description

An auto-stereoscopic display device and a pixel for arranging an auto-stereoscopic display device Methods

The present invention relates to an auto-stereoscopic display device, and more particularly to an auto-stereoscopic display device and method capable of reducing interference fringes by adjusting characteristic parameters of a stereoscopic display device.

With the advancement of technology, stereoscopic display technology has been widely used in movies, home entertainment devices or handheld personal electronic devices. Therefore, in addition to the stereoscopic visual experience, the stereoscopic display technology further promotes the user's attention to image comfort and true and natural image quality.

In terms of practical technology, in order to present a stereoscopic perception in the brain, it is necessary to use visual binocular parallax and motion parallax to image.

In general, the distance between the left and right eyes of the human body is about 65 mm on average. Therefore, when the image enters the user's eyes, since the left and right eyes respectively receive images from different observation angles, the images received by the eyes are also different, which is called binocular parallax. The moving parallax is that when the user's eyes move, the content received by the eyes is different due to the change in viewing angle and position.

Therefore, in order for the viewer to receive the stereoscopic image, the eyes must be separately Individual images that receive minor differences.

Current stereoscopic display technologies include glasses (Stereoscopic) and naked eye (Auto stereoscopic). Among them, the glasses-type 3D stereoscopic display technology, the viewer still has to wear additional optical devices, such as Polarizing glasses, Shutter glasses or Anaglyph. Compared with the glasses-type 3D stereoscopic display technology, the naked-eye type does not need to wear any device; the naked-eye method is to project the processed image information from different angles to different positions in the space, and then let the user receive through the left and right eyes. Different image messages arrive to produce parallax effects.

The optical component most commonly used to assist naked-eye stereo imaging is a lenticular lens. (Lenticular Lenses). In general, a lenticular lens applied to a stereoscopic display is formed into a long convex lens and arranged in a display area of a specified size, and the display pixel is divided into an odd pixel and an even pixel image, and the lenticular lens layer is disposed on the display. When the front of the pixel is used, the focus of the lenticular lens and the refraction of the light are used to change the forward path of the light, thereby generating a spectroscopic effect, so that the image information received by the left and right eyes produces a parallax effect, and then the two visual images are synthesized into a stereoscopic image through the brain. Vision.

However, the technology of using lenticular lenses to achieve 3D stereoscopic display still lacks point. For example, since the production of the lenticular lens requires high precision, and the lenticular lens is attached to the display pixel due to the interference of light, interference fringes are easily generated after the bonding, and the interference fringes cannot be completely completed by the technique. Eliminated, so it can only be reduced with accurate alignment. Moreover, if the interference fringes are more conspicuous, it will not provide a stereoscopic vision that is comfortable for the viewer.

On the other hand, the design of the characteristic parameters of the lenticular lens also affects the interference fringes. Output and pixel image output; therefore, if the characteristic parameters of the lenticular lens can be adjusted to reduce The generation of interference fringes provides a comfortable stereoscopic image for the viewer.

In view of this, how to reduce the generation of interference fringes by adjusting the characteristic parameters of the lenticular lens to provide a comfortable stereoscopic visual experience is an urgent problem to be solved in the industry.

In order to achieve the above objective, the present invention provides an auto-stereoscopic display device including a liquid crystal module (LCD module) display, an adhesive layer, a lens layer, and the like. The characteristic parameters such as Curvature radius, Pitch, Half-pitch, Angle α, and angle 透镜 of the lens layer are related to each other so that the relationship is satisfied: R= When b/sin(α+ψ), the naked-view stereoscopic display device can generate an auto-stereoscopic display device with low interference fringes and good viewing comfort.

The above objects, technical features and advantages will be more apparent from the following description.

1‧‧‧Naked stereoscopic display device

10‧‧‧LCD display

11‧‧‧ top surface

12‧‧‧ bottom

13‧‧‧Full pixel

14‧‧ ‧ sub-pixel

20‧‧‧Adhesive layer

30‧‧‧ lens layer

31‧‧‧ base

311‧‧‧ side

312‧‧‧Bottom

32‧‧‧Face Parts

321‧‧‧ Surface

C _L ‧‧‧ center axis

C _R ‧‧‧Center of Curvature

C‧‧‧ center point of the bottom

S _e ‧‧‧Side extension line

N‧‧‧ equivalent refractive index

P‧‧‧pitch

b‧‧‧Half pitch

t ₀ ‧‧‧thickness

R‧‧‧ radius of curvature

K‧‧‧ intersection

E _L ‧‧‧reflection boundary extension line

N _L ‧‧‧ normal

‧‧‧‧ angle

Ψ‧‧‧ angle

R _max value ‧ ‧ radius of curvature

R _min value ‧ ‧ radius of curvature

1 is a perspective view of an autostereoscopic display device of the present invention.

2 is a partial schematic view of an autostereoscopic stereoscopic display device of the present invention.

Fig. 3 is a schematic view showing a lenticular lens of the autostereoscopic display device of the present invention.

Fig. 4 is a flow chart showing the method of arranging pixels of the autostereoscopic display device 1 of the present invention.

FIG. 5 is a schematic view showing a first embodiment of a pixel arrangement of an auto-stereoscopic display device of the present invention.

6 is a second embodiment of a pixel arrangement of an auto-stereoscopic display device of the present invention. intention.

Please refer to FIG. 1 , which is a schematic diagram of an autostereoscopic stereoscopic display device of the present invention.

As shown, the bare stereo display device 1 includes a liquid crystal module display 10, an adhesive layer 20, and a lens layer 30.

The LCD module display 10 serves as a source of image output, and the size of the naked-view stereoscopic display device 1 can be 7 吋 or 9.7 目前 which is currently common, and can also be designed according to other usage requirements. In addition, the auto-stereoscopic display device 1 of the present invention may be, for example, a home audio-visual appliance, a game entertainment display device, a notebook computer, or a personal handheld display device, a mobile phone, a tablet, or the like.

Please refer to FIG. 2 again, which is a partial schematic view of the naked-eye stereoscopic display device of the present invention.

As shown, the liquid crystal display 10 has a top surface 11 and a bottom surface 12 disposed opposite the top surface 11. In addition, the lens layer 30 can be directly disposed on the top surface 11 of the liquid crystal module display 10 or attached to the top surface 11 of the liquid crystal module display 10 by an adhesive layer 20. The lens layer 30 has a base portion 31 and a curved surface portion 32 provided above the base portion 31, and the curved surface portion 32 is formed by a plurality of curved surfaces 321 arranged in order.

The liquid crystal display 10 is a pixel in which three main color (RGB) light bars of red, green and blue are combined in parallel. The liquid crystal module display 10 has a plurality of full pixels 13 (Full-Pixel), and the plurality of full pixels 13 each have a plurality of sub-pixels 14 (Sub-pixel), and the plurality of sub-pixels 14 are respectively R pixel strips, G pixel strips and B Pixel strips.

For example, in the embodiment shown in FIG. 2, the liquid crystal display 10 includes a plurality of full pixels 13, and each of the full pixels 13 is composed of three sub-pixels 14.

As shown in FIG. 3, it is a schematic view of the lens layer 30 of the autostereoscopic display device 1 of the present invention.

The lens layer 30 has a base portion 31 and a curved surface portion 32. The lens layer 30 has an equivalent refractive index n, a pitch p, and a half pitch b. The base portion 31 has a thickness t ₀ , and a base point C having a bottom side and a side extension line S _e below the base portion 31. The curved surface portion 32 has a complex curved surface 321 having a radius of curvature R.

Further, an intersection k is defined at the intersection of the curved surface 321 and the side edge 311 of the base portion 31. The extension of the line connecting the center point C of the bottom edge to the intersection point k defines a reflection boundary extension line E _L . The tangent to the vertical radius of curvature R is defined as a normal N _L and the normal N _L passes through the intersection k. The reflection boundary extension line E _L and the normal line N _L have an angle α, and the reflection boundary extension line E _L and the side extension line S _e of the base have an angle ψ, and the lens layer 30 can define the curvature. The radius R is such that the radius of curvature R satisfies the following relationship: R = b / sin (α + ψ).

In other words, when the radius of curvature R satisfies the relationship, the naked-eye stereoscopic display device 1 of the present invention can provide a comfortable stereoscopic view for the viewer.

The structure of the lens layer 30 will be further described below.

Referring again to FIG. 2, the lens layer 30 is formed by arranging a plurality of cylindrical lenses, and is formed by an integral molding process. Therefore, a plurality of cylindrical lenses are arranged to form a plurality of curved surfaces 321 on the surface of the lens layer 30.

Viewed from the cross-section of the lens layer 30, the lens layer 30 includes a base portion 31 and a curved surface portion 32, and a portion covered by the base portion 31 defines a thickness t ₀ , and each of the curved surfaces 321 on the curved surface portion 32 has the same shape and size. .

Since the top surface 11 of the liquid crystal display 10 can also have an adhesive layer 20 The lens layer 30 is attached, so that the adhesive layer 20 must have good light transmittance, good bonding strength, high temperature resistance and ultraviolet resistance. The material of the adhesive layer can be: optical adhesive (OCA), pressure sensitive adhesive (PSA), silicone rubber and the like.

On the other hand, if the adhesive layer 20 is not used, the naked stereoscopic display device of the present invention 1 has a detachable (external) function. That is, the lens layer 30 can be directly disposed as a separate component and then hung on the liquid crystal display screen, thereby generating a 3D visual effect. If you remove it, you can restore the general 2D visual effects.

As shown in FIGS. 2 and 3, in a preferred embodiment of the present invention, each sub-pixel 14 has a width a and the pitch p is less than 2 times the width a. The relationship between the pitch p and the half pitch b is: p=2b. The radius of curvature R has a central axis C _L , and the central axis C _L and the bottom edge 312 of the base 31 define a center point C of the base. The radius of curvature R is between a value of R _max and a value of R _min , where R _min is the value of the half pitch b, R _{max is} greater than the radius of curvature R, and satisfies the following relationship: R _min <curvature radius R < R _max .

As shown in FIG. 4, the present invention also provides a pixel of the naked-view stereoscopic display device 1. The arranging method comprises the following steps: as shown in step 501, the lens layer 30 is provided, the lens layer 30 has a base portion 31 and a curved surface portion 32 disposed above the base portion 31, and the curved surface portion 32 is a plurality of curved surfaces 321 arranged in sequence. . Next, as shown in step 502, the liquid crystal module display 10 is provided such that the liquid crystal module display 10 has a horizontal width, a vertical width, and a plurality of full pixels 13, and the plurality of full pixels 13 each have a plurality of sub-pixels 14. Finally, as shown in step 503, the lens layer 30 is disposed on the liquid crystal module display 10 such that the plurality of pixels are arranged below the lens layer 30.

After the foregoing steps are completed, the sub-pixel 14 can be performed in the following two ways. The arrangement is as follows: as shown in step 504, the plurality of sub-pixels 14 are arranged along a vertical width direction, and the adjacent plurality of sub-pixels 14 have mutually different pixels in the vertical width direction; or, as in step 505 As shown, the plurality of sub-pixels 14 are arranged in a direction of a horizontal width, and the adjacent plurality of sub-pixels 14 have mutually different pixels in the horizontal direction.

In addition, in step 503, the lens layer 30 may be attached to the liquid crystal module display 10 by the adhesive layer 20, so that the plurality of pixels are arranged below the lens layer 30.

It should be noted that the above embodiment in which the plurality of pixels are arranged below the lens layer 30 can further have the following embodiments.

First, as shown in FIG. 5, when the lens layer 30 is disposed on the liquid crystal display 10, one of the plurality of curved surfaces 321 is used only to cover the two sub-pixels 14. Therefore, in the embodiment shown in FIG. 5, the curved surface 321 has a pitch p which is slightly smaller than the total width of the two sub-pixels 14.

Or, as shown in FIG. 6, when the lens layer 30 is disposed on the liquid crystal display 10, one of the plurality of curved surfaces 321 is used to cover the two full pixels 13 (ie, a total of six sub-pixels are covered). 14). Therefore, in the embodiment shown in FIG. 6, the curved surface 321 has a pitch p which is slightly smaller than the total width of the two full pixels 13 (i.e., the total width of the six sub-pixels 14).

In summary, through the special arrangement relationship between the lens layer 30 and the full pixel 13 or the sub-pixel 14, while defining the characteristic parameters of the lens layer 30 by the naked-eye stereoscopic display device 1 of the present invention, when R=b/ is satisfied. When the relationship between sin(α+ψ) is used, it will produce a stereoscopic stereoscopic display device with low interference fringes and good viewing comfort.

The above embodiments are only used to illustrate the embodiments of the present invention, and to explain the technical features of the present invention, and are not intended to limit the scope of protection of the present invention. Anyone familiar with this technology can be light The arrangement of the change or the equality of the present invention is within the scope of the invention. The scope of the invention should be determined by the scope of the patent application.

1‧‧‧Naked stereoscopic display device

10‧‧‧LCD display

20‧‧‧Adhesive layer

30‧‧‧ lens layer

Claims (12)

A naked-view stereoscopic display device comprising: a liquid crystal module (LCD module) display having a top surface and a bottom surface disposed opposite to the top surface; and a lens layer disposed above the liquid crystal module display, the lens The layer has a base portion and a curved surface portion disposed above the base portion, and the curved surface portion is a plurality of curved surfaces arranged in sequence; wherein the lens layer has an equivalent refractive index n, a pitch p, and a half gate a distance b, the base has a thickness t ₀ , a base point C below the base has a bottom edge, and the base side has a side extension line S _e , each of the curved surfaces having a radius of curvature R, the curved surface and the surface The intersection of the sides of the base defines an intersection point k; the extension of the line connecting the center point C of the base and the intersection k defines a reflection boundary extension line E _L ; the tangent of the curvature radius R is defined as a normal line N _L And the normal line N _L passes through the intersection point k; the reflection boundary extension line E _L and the normal line N _L have an angle α, and the reflection boundary extension line E _L and the side extension line of the base portion S _e between a system having an angle ψ, and the lens layer may be adapted Meaning the radius of curvature R, so that the radius of curvature R satisfies the following relationship: R = b / sin (α + ψ). The auto-stereoscopic display device of claim 1, wherein the liquid crystal display further comprises an adhesive layer disposed between the liquid crystal display and the lens layer. The naked stereoscopic display device of claim 1, wherein the liquid crystal module display has a plurality of full pixels (Full-Pixel), and the full pixels each have a plurality of sub-pixels (Sub-Pixel). The naked stereoscopic display device of claim 1, wherein each of the sub-pixel systems There is a width, and the pitch p is less than 2 times the width. The naked stereoscopic display device of claim 1, wherein the relationship between the pitch p and the half pitch b is: p=2b. The autostereoscopic display device according to claim 1, wherein the radius of curvature R has a central axis C _L , and the central axis C _L and a bottom edge of the base define a center point C of the bottom edge. The naked-view stereoscopic display device of claim 1, wherein the radius of curvature R is between a value of R _max and a value of R _min , wherein the R _min is a value of the half-pitch b, and R _{max is} greater than the radius of curvature R, and satisfies the following relationship: R _min < curvature radius R < R _max . A method for arranging pixels of a stereoscopic stereoscopic display device, comprising: (a) providing a lens layer having a base portion and a curved surface portion disposed above the base portion, wherein the curved surface portion is a plurality of sequentially arranged a curved surface display; (b) providing a liquid crystal display having a horizontal width, a vertical width, and a plurality of full pixels, wherein the full pixels each have a plurality of pixels; and (c) setting the lens layer The pixels are arranged below the lens layer on the display of the liquid crystal module. The method of claim 8, further comprising the step of: (d1) arranging the sub-pixels in the direction of the vertical width, and the adjacent sub-pixels have mutually different pixels in the vertical width direction. The method of claim 8, further comprising the step of: (d2) arranging the sub-pixels along the horizontal width, and the adjacent sub-pixels have mutually different pixels in the horizontal direction. The method of claim 8, wherein the step (c) comprises: (c1) attaching the lens layer to the liquid crystal module display such that the pixels are arranged below the lens layer. The method of claim 8, wherein one of the plurality of curved surfaces is adapted to cover one or more full pixels when the lens layer is disposed on the liquid crystal display.