CN106054397A - Naked eye three-dimensional display and manufacturing method thereof - Google Patents

Abstract

The invention provides a naked-eye stereoscopic display. The naked-eye three-dimensional display includes a glass cover, a display screen, a backlight module, and a touch control unit disposed on the display screen, and the display screen is sandwiched between the glass cover plate and the backlight module. The glass cover plate includes a back side facing the display screen and a front side opposite to the back side, the back side includes N circular arc-shaped protrusions that act as lenses and are connected in sequence, and the N arc-shaped protrusions The converging lenses are arranged in parallel, and the front side of the glass cover plate is flat. In the present invention, the back of the glass cover is processed into a pattern with N arc-shaped protrusions, and the arc-shaped protrusions have a lens function, so that the original 2D display can realize 3D images with naked eyes without adding 3D optical equipment. function, and the thickness of the glass cover does not need to be increased, compared with the prior art products, it has the advantages of thinner and better touch function.

Description

Naked-eye stereoscopic display and manufacturing method thereof

technical field

The invention relates to the technical field of displays, in particular to a naked-eye stereoscopic display and a manufacturing method thereof.

Background technique

Currently, 3D display devices are becoming more and more well known, and the 3D display devices mainly include glasses 3D mode and glasses-free 3D mode. The display device in the glasses 3D mode needs to wear special glasses, and the left-eye lens and the right-eye lens respectively allow linearly polarized light with different polarization directions to pass through, so that the images viewed by the left eye and the right eye are formed by linearly polarized light with different polarization directions. The brain integrates the left-eye image and the right-eye image to form a stereoscopic image. Since people need to wear special glasses when viewing images displayed in 3D glasses, otherwise the images will become blurred, which limits the scope of application of the 3D glasses mode. Therefore, naked eye 3D mode is sought after by more and more people.

The touch display panels in the prior art are divided according to different structures: the touch circuit is covered on the liquid crystal cell (OnCell), the touch circuit is embedded in the liquid crystal cell (In Cell) and the plug-in type. Among them, the plug-in touch display panel is produced separately from the touch panel and the liquid crystal display panel, and then bonded together to form a display panel with touch function. The plug-in touch display panel has high production cost and low light transmittance. Low, thick modules and other shortcomings. The in-cell touch display panel has the advantages of low cost and thin thickness, and is favored by major panel manufacturers, and has evolved into the main development direction of future touch technology.

At present, the naked-eye 3D products of portable handheld terminals on the market include mobile phones and tablets with liquid crystal slit grating, mobile phones and tablets with cylindrical lens film, and mobile phones and tablets with liquid crystal lenses. The design scheme of these glasses-free 3D products is to add 3D optical devices, such as liquid crystal slit gratings, lens films, and liquid crystal lenses, to the original products that output 2D images. The existing naked-eye stereoscopic display using an embedded touch display panel includes a glass cover plate, a 3D optical device, a display screen with a touch control unit, and a backlight module that are sequentially stacked. Adding 3D optical devices will undoubtedly increase the thickness and weight of the product, which will increase the inconvenience for users to carry. Moreover, after the 3D optical device is bonded to the display screen, a multi-layer medium is added between the glass cover and the touch control unit located inside the display screen, which will inevitably affect the touch function of the touch control unit, or even make it invalid.

Therefore, it is necessary to provide an improved naked-eye stereoscopic display to overcome the above defects.

Contents of the invention

In order to solve the technical problems of the naked-eye three-dimensional display, the present invention processes the back of the glass cover into a lenticular lens pattern with a lens function, so that the glass cover has a protective function and a lens function at the same time, and the original 2D display does not need to add 3D optical devices The naked-eye viewing of 3D images can be realized, and the thickness and weight do not need to be changed, and it is applied to a portable terminal device, and the portable terminal device has the advantages of thinness, portability and sensitive touch.

The present invention provides a naked-eye three-dimensional display. The naked-eye three-dimensional display includes a glass cover plate, a display screen, a backlight module, and a touch control unit arranged on the display screen. The display screen is sandwiched between the glass cover plate and the display screen. Between the backlight modules, the glass cover plate includes a back facing the display screen and a front opposite to the back, the back includes N arc-shaped protrusions that function as lenses and are sequentially connected, N arc-shaped protrusions are arranged in parallel to form a converging lens, the protrusion direction of the arc-shaped protrusions faces the display screen, and the front surface of the glass cover plate is a plane.

In a preferred embodiment of the naked-eye three-dimensional display provided by the present invention, the display screen includes an upper substrate, a lower substrate, and a display layer sandwiched between the upper substrate and the lower substrate, and the upper substrate is close to the glass The back of the cover is set.

In a preferred embodiment of the naked-eye stereoscopic display provided by the present invention, the upper substrate is a color filter substrate, and the lower substrate is a thin film transistor array substrate.

In a preferred embodiment of the naked-eye stereoscopic display provided by the present invention, the touch unit is disposed on the upper substrate or the lower substrate.

In a preferred embodiment of the naked-eye stereoscopic display provided by the present invention, the arc-shaped protrusion satisfies the following conditional formula:

The radius of curvature r=m×L(n-1)/E of the arc-shaped protrusion;

The width W=2m×E/(m+E) of the arc-shaped protrusion;

The lens focal length f=r/(n-1) of described arc-shaped protrusion;

The arch height t=r-[r ² -(W/2) ² ] ^1/2 of the arc-shaped protrusion;

Wherein, 2m is the left and right image display pixel pitch of the display screen;

L is the observation distance;

n is the refractive index of the glass cover;

E is the distance between the pupils of the eyes.

In a preferred embodiment of the naked-eye three-dimensional display provided by the present invention, the distance h between the apex of the arc-shaped protrusion and the surface of the upper substrate close to the glass cover satisfies the following conditional formula:

h=f-d-t,

Wherein, f is the focal length of the lens of the arc-shaped protrusion;

d is the thickness of the upper substrate of the display screen;

t is the arch height of the arc-shaped protrusion.

The present invention simultaneously provides a method for manufacturing a naked-eye stereoscopic display, comprising the following steps:

Step 1. Provide a glass cover: the glass cover includes a front and a back opposite to the front, and the front and back of the glass cover are planes;

Step 2, processing the glass cover plate, specifically including:

Lenticular lens pattern forming: forming the back of the glass cover into a lenticular lens pattern composed of N sequentially connected arc-shaped protrusions;

Lenticular lens pattern protection: attaching a protective layer on the surface of the lenticular lens pattern;

Carrying out cutting and CNC processing and molding the glass cover plate;

Carrying out surface treatment to the front side of the glass cover plate;

Carrying out silk screen printing on the glass cover plate, while reserving the first alignment mark on the back side of the glass cover plate;

Step 3, providing a display screen with a touch control unit, and making a second alignment mark on the surface of the display screen;

Step 4, fitting the first alignment mark on the glass cover plate with the second alignment mark on the display screen to complete the assembly of the glass-off substrate and the display screen;

Step 5, providing a backlight module, combining the glass cover, the display screen and the backlight module to form a naked-eye three-dimensional display, and the display screen is arranged on the glass cover and the backlight module between.

In a preferred embodiment of the method for manufacturing a naked-eye stereoscopic display provided by the present invention, laser engraving or mold forming is used to form a lenticular lens pattern on the back of the glass cover plate.

In a preferred embodiment of the method for making a naked-eye stereoscopic display provided by the present invention, the arc-shaped protrusions satisfy the conditional formula:

The radius of curvature r=m×L(n-1)/E of the arc-shaped protrusion;

The width W=2m×E/(m+E) of the arc-shaped protrusion;

The lens focal length f=r/(n-1) of described arc-shaped protrusion;

The arch height t=r-[r ² -(W/2) ² ] ^1/2 of the arc-shaped protrusion;

Wherein, 2m is the left and right image display pixel pitch of the display screen;

L is the observation distance;

n is the refractive index of the glass cover;

E is the distance between the pupils of the eyes.

In a preferred embodiment of the manufacturing method of the naked-eye three-dimensional display provided by the present invention, the display screen includes an upper substrate, a lower substrate, and a display layer sandwiched between the upper substrate and the lower substrate, and the upper substrate sandwiches Located between the glass cover and the display layer, the distance h between the apex of the arc-shaped protrusion and the surface of the upper substrate close to the glass cover satisfies the following conditional formula:

h=f-d-t,

Wherein, f is the focal length of the lens of the arc-shaped protrusion;

d is the thickness of the upper substrate;

t is the arch height of the arc-shaped protrusion.

Compared with the prior art, the naked-eye stereoscopic display provided by the present invention and its manufacturing method have the following beneficial effects:

1. The present invention processes the back side of the glass cover plate into a lenticular lens pattern connected sequentially by N arc-shaped protrusions. The arc-shaped protrusions have a lens function, so that the original 2D display can be displayed without adding 3D optical equipment. Realize the function of viewing 3D images with naked eyes, and the thickness of the glass cover plate does not need to be increased, which has the advantages of being thin and light and has good touch function compared with the prior art products;

Two, by rationally designing the radius of curvature of the arc-shaped protrusion, the width value and the distance between the apex of the arc-shaped protrusion and the display screen, it is ensured that the imaging effect of the naked-eye stereoscopic display is good; When used in portable terminal equipment, the suitable viewing distance is 0.2 to 0.4 meters, which is in line with people's usage habits.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative work, wherein:

Fig. 1 is a schematic structural view of a naked-eye stereoscopic display provided by the present invention;

Fig. 2 is a cross-sectional view of the naked-eye stereoscopic display shown in Fig. 1;

Fig. 3 is a structural schematic diagram of two arc-shaped protrusions and a part of the display screen shown in Fig. 2;

Fig. 4 is a flow chart of the manufacturing method steps of the naked-eye stereoscopic display shown in Fig. 1;

FIG. 5 is a flow chart of step S2 of the manufacturing method of the naked-eye stereoscopic display shown in FIG. 4 .

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to FIG. 1 and FIG. 2 , wherein FIG. 1 is a schematic structural view of the naked-eye stereoscopic display provided by the present invention, and FIG. 2 is a cross-sectional view of the naked-eye stereoscopic display shown in FIG. 1 . The naked-eye stereoscopic display 100 includes a glass cover 110 , a display screen 130 , a backlight module 150 and a touch control unit. The display screen 130 is interposed between the glass cover 110 and the backlight module 150 . The touch control unit is disposed in the display screen 130 , specifically, using in cell technology, that is, the touch control circuit is embedded in the display screen 130 .

The glass cover 110 integrates glass protection functions and lens functions, and has a thickness of 0.4-0.7 mm. The glass cover 110 includes a back side 113 facing the display screen 130 and a front side 111 opposite to the back side 113 .

The front surface 111 is flat, and the user touches the front surface 111 to trigger the touch control unit provided on the display screen 130 to realize the touch function.

Please refer to FIG. 3 , which is a structural schematic diagram of the two arc-shaped protrusions and a part of the display screen shown in FIG. 2 . The back surface 113 includes N arc-shaped protrusions 1131 connected in sequence, because the glass cover plate 110 has a certain refractive index, the arc-shaped protrusions 1131 act as lenses, and the N arc-shaped protrusions 1131 are arranged in parallel to form a converging lens, so that the two-dimensional image displayed on the display screen 130 is output in a 3D mode after passing through the converging lens. The protruding direction of the arc-shaped protrusion 1131 faces the display screen 130 , that is, the apex of the arc-shaped protrusion 1131 faces the display screen 130 .

The arc-shaped protrusion 1131 satisfies the following conditional formula:

The radius of curvature r=m×L(n-1)/E of the arc-shaped protrusion;

The width W=2m×E/(m+E) of the arc-shaped protrusion;

The lens focal length f=r/(n-1) of described arc-shaped protrusion;

The arch height t=r-[r ² -(W/2) ² ] ^1/2 of the arc-shaped protrusion;

Wherein, 2m is the left and right image display pixel pitch of the display screen;

L is the observation distance;

n is the refractive index of the glass cover;

E is the distance between the pupils of the eyes.

In this embodiment, the refractive index of the glass cover 110 is between 1.48˜1.65. The pixel pitch of the display screen 130 is determined by the resolution of the display screen 130 . The number of the arc-shaped protrusions 1131 is determined by the spacing between the left and right image display pixels of the display screen 130 and the width of the arc-shaped protrusions 1131, for example, it can be 2 pixels to display the left and right image pairs; It may be that 4 pixels display a pair of left and right images, of which 2 pixels display a left eye image, and the other 2 pixels display a right eye image; or even other odd or non-integer number of pixels. When the naked-eye stereoscopic display 100 is applied to a portable terminal device, the suitable viewing distance L is 200-400 mm.

By designing the back of the glass cover plate 110 as an arc-shaped protrusion 1131 with a lens effect, the function of viewing 3D images with naked eyes can be realized without adding 3D optical devices. When it is applied to a portable terminal device, the thickness is thin, Light weight, moderate viewing distance, and more sensitive touch functions can meet the higher needs of users.

The display screen 130 includes an upper substrate 131 , a lower substrate 133 and a display layer 135 sandwiched between the upper substrate 131 and the lower substrate 133 . The upper substrate 131 is disposed between the glass cover 110 and the display layer 135 , and the lower substrate 133 is disposed between the display layer 135 and the backlight module 150 . The touch unit is disposed on the upper substrate 131 or the lower substrate 133 . In this embodiment, the upper substrate 131 is a color filter substrate (Color Filter, CF), and the lower substrate 133 is a thin film transistor array substrate (Thin Film Transistor Array Substrate, TFT Array Substrate).

The display screen 130 and the glass cover 110 are spaced apart, and the distance h between the apex of the arc-shaped protrusion 1131 and the surface of the upper substrate 131 close to the glass cover 110 satisfies the following conditional formula:

h=f-d-t

Wherein f is the lens focal length of described arc-shaped protrusion;

d is the thickness of the upper substrate of the display screen;

t is the arch height of the arc-shaped protrusion.

The backlight module 150 is used to provide a backlight for the display screen 130 . The backlight module 150 is disposed on the back of the display screen 130 . In this embodiment, the back of the display screen 130 is the surface of the display screen 130 away from the glass cover 110 .

Please refer to FIG. 4 and FIG. 5 in conjunction, wherein FIG. 4 is a flow chart of the manufacturing method of the naked-eye stereoscopic display shown in FIG. 1 , and FIG. 5 is a flowchart of step S2 of the manufacturing method of the naked-eye stereoscopic display shown in FIG. 4 .

The present invention also provides a method for manufacturing the aforementioned naked-eye stereoscopic display, which specifically includes the following steps:

Step S1, providing a glass cover:

The thickness of the glass cover plate is 0.4-0.7mm, which is the same as that of the glass cover plate of the existing 2D image display device. The glass cover includes a front and a back opposite to the front, and the front and back of the glass cover are planes;

Step S2, processing the glass cover, specifically includes:

Step S21, lenticular lens pattern forming: forming the back of the glass cover into a lenticular lens pattern composed of N sequentially connected arc-shaped protrusions; the arc-shaped protrusions function as lenses, which can be engraved by laser or The mold molding method performs pattern molding on the back side of the glass cover plate.

Step S22, protection of the lenticular lens pattern: attaching a protective layer on the surface of the lenticular lens pattern;

The protective layer is attached to prevent the lenticular lens pattern from being worn and damaged in the subsequent process, and the protective layer is peeled off when it is bonded with other components.

Step S23, cutting and CNC processing the glass cover plate;

Step S24, performing surface treatment on the front side of the glass cover;

Step S25, performing silk screen printing on the glass cover, and reserving a first alignment mark on the back;

Step S3, providing a display screen provided with a touch control unit, and making a second alignment mark on the surface of the display screen;

Step S4, fitting the first alignment mark on the glass cover plate with the second alignment mark on the display screen to complete the assembly of the glass substrate and the display screen;

Step S5, providing a backlight module, combining the glass cover, the display screen and the backlight module to form a naked-eye three-dimensional display, and the display screen is arranged on the glass cover and the backlight module between.

The naked-eye stereoscopic display provided by the present invention and its manufacturing method have the following beneficial effects:

1. The present invention processes the back side 113 of the glass cover plate 110 into a cylindrical lens pattern in which N arc-shaped protrusions are sequentially connected. The arc-shaped protrusions 1131 have a lens function, so that the original 2D display does not need to add 3D optics. The device can realize the function of viewing 3D images with naked eyes, and the thickness of the glass cover plate 110 does not need to be increased. Compared with the prior art products, it has the advantages of lightness and good touch function.

Two, by reasonably designing the radius of curvature of the arc-shaped protrusion 1131, the width value and the distance between the apex of the arc-shaped protrusion 1131 and the display screen 130, it is ensured that the naked-eye stereoscopic display 100 has a good imaging effect. When the naked-eye stereoscopic display 100 is used in a portable terminal device, the suitable viewing distance is 0.2-0.4 meters, which is in line with people's usage habits.

The above is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process conversion made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technologies fields, all of which are equally included in the scope of patent protection of the present invention.

Claims (10)

1. a naked-eye stereoscopic display, including glass cover-plate, display screen, backlight module and the touch-control list being located at described display screen Unit, described display screen is located between described glass cover-plate and described backlight module, and described glass cover-plate includes towards described aobvious The back side of display screen and the front being oppositely arranged with the described back side, it is characterised in that the described back side includes N number of lensing and depends on The arc-shaped convex of secondary connection, N number of described arc-shaped convex composition arranged in parallel plus lens, the projection of described arc-shaped convex Direction is towards described display screen, and the front of described glass cover-plate is plane.

Naked-eye stereoscopic display the most according to claim 1, it is characterised in that described display screen includes upper substrate, lower base Plate and be located in the display layer between described upper substrate and infrabasal plate, described upper substrate sets near the back side of described glass cover-plate Put.

Naked-eye stereoscopic display the most according to claim 2, it is characterised in that described upper substrate is color membrane substrates, described Infrabasal plate is thin-film transistor array base-plate.

Naked-eye stereoscopic display the most according to claim 3, it is characterised in that described touch control unit is located at described upper substrate Or described infrabasal plate.

Naked-eye stereoscopic display the most according to claim 2, it is characterised in that described arc-shaped convex meets following condition Formula:

Radius of curvature r=m of described arc-shaped convex × L (n-1)/E；

The width W=2m of described arc-shaped convex × E/ (m+E)；

Focal length of lens f=r/ (n-1) of described arc-shaped convex；

Sagitta t=r-[the r of described arc-shaped convex²-(W/2)²]^1/2；

Wherein, 2m is the left images display pixel pitch of described display screen；

L is viewing distance；

N is the refractive index of glass cover-plate；

E is pupil of both eyes spacing.

Naked-eye stereoscopic display the most according to claim 5, it is characterised in that the summit of described arc-shaped convex is with described Upper substrate distance h between described glass cover plate surfaces meets following condition formula:

H=f-d-t,

Wherein, f is the focal length of lens of described arc-shaped convex；

D is the thickness of the upper substrate of described display screen；

T is the sagitta of described arc-shaped convex.

7. the manufacture method of a naked-eye stereoscopic display, it is characterised in that comprise the steps:

Step one, offer glass cover-plate: described glass cover-plate includes front and the back side arranged with described vis-a-vis, described glass The front and back of glass cover plate is plane；

Step 2, described glass cover-plate is processed, specifically includes:

Lens pillar pattern forming: by the bead formed on back of described glass cover-plate be N number of arc-shaped convex being sequentially connected with composition Lens pillar pattern；

Lens pillar pattern is protected: be sticked protective layer on the surface of described lens pillar pattern；

Described glass cover-plate is cut and CNC machine-shaping；

The front of described glass cover-plate is carried out surface process；

Described glass cover-plate is carried out silk-screen, reserves the first alignment mark at the back side of described glass cover-plate simultaneously；

Step 3, offer are provided with the display screen of touch control unit, make the second alignment mark on the surface of described display screen；

Step 4, the second alignment mark of the first alignment mark of described glass cover-plate Yu described display screen is carried out fit, complete Become described glass substrate and the assembling of described display screen；

Step 5, provide backlight module, be combined described glass cover-plate, described display screen and described backlight module making naked Eye three-dimensional display, described display screen is located between described glass cover-plate and described backlight module.

The manufacture method of naked-eye stereoscopic display the most according to claim 7, it is characterised in that use laser engraving or mould The method of tool molding carries out lens pillar pattern forming to the back side of described glass cover-plate.

The manufacture method of naked-eye stereoscopic display the most according to claim 7, it is characterised in that described arc-shaped convex is full The following condition formula of foot:

Radius of curvature r=m of described arc-shaped convex × L (n-1)/E；

The width W=2m of described arc-shaped convex × E/ (m+E)；

Focal length of lens f=r/ (n-1) of described arc-shaped convex；

Sagitta t=r-[the r of described arc-shaped convex²-(W/2)²]^1/2；

Wherein, 2m is the left images display pixel pitch of described display screen；

L is viewing distance；

N is the refractive index of glass cover-plate；

E is pupil of both eyes spacing.

The manufacture method of naked-eye stereoscopic display the most according to claim 9, it is characterised in that described display screen includes Upper substrate, infrabasal plate and be located in the display layer between described upper substrate and infrabasal plate, described upper substrate is located in described glass Between cover plate and described display layer, the summit of described arc-shaped convex and described upper substrate are between described glass cover plate surfaces Distance h meet following condition formula:

H=f-d-t,

Wherein, f is the focal length of lens of described arc-shaped convex；

D is the thickness of described upper substrate；

T is the sagitta of described arc-shaped convex.