CN101398989A - Curved display panel and manufacturing method thereof - Google Patents

Abstract

The invention discloses a curved display panel and a manufacturing method thereof. The display module is provided with a first glass carrier plate which is provided with a first curved surface. The first fixed substrate is provided with a second curved surface which is opposite to the first curved surface. The bonding material bonds the first curved surface and the second curved surface.

Description

Curved display panel and manufacturing method thereof

technical field

The present invention relates to a display panel, in particular to a curved display panel and a manufacturing method thereof.

Background technique

Flat Panel Display (FPD) has gradually replaced the traditional cathode ray tube (Cathode Ray Tube, CRT) display device due to its superior characteristics such as light and thin body, low power consumption and no radiation, and has been applied to various electronic devices. product.

There are various types of flat panel display devices, such as liquid crystal display devices, organic light emitting diode display devices, electronic paper display devices and light emitting diode display devices. Taking a liquid crystal display device as an example for illustration, the liquid crystal display device mainly includes a liquid crystal display module and a backlight module. Wherein, the liquid crystal display module mainly has a color filter substrate, a thin film transistor substrate and a liquid crystal layer sandwiched between the two substrates.

In addition, all kinds of consumer electronic products have shifted from functionality to artistic development based on design, novelty and fashion. Consumers not only focus on functionality, but also design and product type are the main factors affecting consumer behavior. For example, the industry has developed a liquid crystal display device with a curved surface, and the key point of its manufacture is to bend the liquid crystal display module. The bending method is generally to directly apply force to the liquid crystal display module to bend it. However, the color filter substrate and the thin film transistor substrate of the liquid crystal display module all have glass carriers. When applying force directly to the glass carrier, it will cause The stress concentration of the liquid crystal display module breaks and damages the glass carrier.

Therefore, how to provide a curved display panel and its manufacturing method, which can solve existing problems and improve product yield, is one of the current important issues.

Contents of the invention

In view of the above problems, an object of the present invention is to provide a curved display panel capable of improving product yield and a manufacturing method thereof.

To achieve the above purpose, a curved display panel according to the present invention includes a display module, a first fixed substrate and an adhesive material. The display module has a first glass carrier, and the first glass carrier has a first curved surface. The first fixed substrate has a second curved surface opposite to the first curved surface. The bonding material bonds the first curved surface and the second curved surface.

To achieve the above object, a method of manufacturing a curved display panel according to the present invention includes: providing a display module having a first glass carrier; providing a first fixing substrate; aligning the first glass carrier and the first fixing the substrate; bonding the first glass carrier and the first fixed substrate; and bending the first fixed substrate so that the display module is bent together.

To achieve the above object, a method of manufacturing a curved display panel according to the present invention includes: providing a display module having a first glass carrier; providing a first fixing substrate; aligning the first glass carrier and the first fixing The substrate; bonding the first glass carrier and the first fixed substrate through an adhesive material, the adhesive material includes a strip glue and a water glue; and bending the first fixed substrate so that the display module is bent together.

Based on the above, according to the curved display panel and the manufacturing method thereof of the present invention, the display module having the first glass carrier and the first fixed substrate are aligned and bonded, and then the first fixed substrate is bent by applying force. so that the display module is bent together. Since the present invention does not directly apply force to the first glass carrier to make it bend, but applies force to the first fixed substrate and bends the first glass carrier together, thereby avoiding the occurrence of stress concentration on the first glass carrier. In turn, the display module is protected and the yield rate is improved. In addition, the adhesive material used to bond the first glass carrier plate and the first fixed substrate in the present invention includes tape glue and water glue, through glue materials with different characteristics (for example, the tape has strong adhesiveness but when attached Easy to produce air bubbles, water-like adhesives are weak but not easy to form air bubbles) to achieve better bonding effect and improve product yield.

Description of drawings

FIG. 1 is a flow chart of a method for manufacturing a curved display panel according to a preferred embodiment of the present invention;

Fig. 2 is a schematic diagram of the assembly and thinning of the display module of the curved display panel according to the preferred embodiment of the present invention;

3 is a schematic diagram of a first fixed substrate of a curved display panel according to a preferred embodiment of the present invention;

4 is a schematic diagram of the bonding and bending steps of the display module and the first fixed substrate of the curved display panel in a preferred embodiment of the present invention;

5 is a schematic diagram of a first fixed substrate and an adhesive material of a curved display panel according to a preferred embodiment of the present invention;

6 is a schematic diagram of another curved display panel according to a preferred embodiment of the present invention;

7 and 8 are schematic diagrams of a curved display device using a curved display panel according to a preferred embodiment of the present invention;

FIG. 9 is a schematic diagram of another curved display panel according to a preferred embodiment of the present invention; and

FIG. 10 is a schematic diagram of another curved display panel according to a preferred embodiment of the present invention.

Description of main component symbols

1: display module

11, 11': the first substrate

111, 111': the first glass carrier

112, 112', 122, 122': element layer

12, 12': the second substrate

121, 121': second glass carrier

13: Liquid crystal layer

2, 2': the first fixed substrate

21, 61: Microstructure

3: Adhesive material

31: Tape glue

32: Hydrogel

4, 5: Surface display device

6, 6': the second fixed substrate

C1, C1′: the first curved surface

C2, C2': the second curved surface

C3, C3′: the third curved surface

C4, C4': the fourth curved surface

P1, P2, P3, P4: curved display panels

S01-S05: Steps of the manufacturing method of the curved display panel

Detailed ways

The curved display panel and its manufacturing method according to preferred embodiments of the present invention will be described below with reference to related drawings, wherein the same elements will be described with the same reference symbols.

FIG. 1 is a manufacturing method of a curved display panel according to a preferred embodiment of the present invention, which includes steps S01-S05. The manufacturing method is described below with FIG. 1 and other drawings.

Please refer to FIG. 2 , step S01 is to provide a display module 1 having a glass substrate 111 or 121 . Hereinafter, the glass carrier 111 will be referred to as a first glass carrier, and the glass carrier 121 will be referred to as a second glass carrier. The display module 1 of the present invention is not limited to any type, as long as it has a glass carrier, such as a liquid crystal display module, an organic light emitting diode display module, an electronic paper display module or a light emitting diode display module. The display module 1 of this embodiment is an example of a liquid crystal display module.

The display module 1 has a first substrate 11 and a second substrate 12 , the first substrate 11 has a first glass carrier 111 , and the second substrate 12 has a second glass carrier 121 . In this embodiment, the first substrate 11 is a thin film transistor (Thin Film Transistor, TFT) substrate, and the second substrate 12 is a color filter (Color Filter, CF) substrate, on the first glass carrier 111 there is a The element layer 112 mainly includes a thin film transistor and a pixel electrode (Pixel Electrode) layer, and has another element layer 122 on the second glass carrier 121, which mainly includes a color filter layer and a black matrix (Black Matrix, BM) layer And common electrode (Common Electrode) layer.

In this embodiment, the step S01 of providing the display module 1 further includes assembling two substrates 11 , 12 and disposing a liquid crystal layer 13 between the two substrates. In addition, the step S01 further includes a manufacturing process of thinning the first and second glass carrier plates 111 and 121 so that the first and second glass carrier plates 111 and 121 are flexible. Of course, if the original first and second glass carrier plates 111, 121 are flexible, this thinning process can be omitted; in addition, this embodiment can also only focus on the first glass carrier plate 111 and the second glass carrier plate 121 One of them is subjected to a thinning manufacturing process. Here, both the first and second glass carrier plates 111 and 121 are thinned to a thickness less than or equal to 0.2 mm. The manufacturing process of glass carrier plate thinning can be implemented by chemical means and/or physical means, wherein chemical means such as dry etching, wet etching, physical means such as grinding, polishing, chemical and physical means such as chemical mechanical polishing (Chemical-Mechanical Polishing, CMP).

As shown in FIG. 3 , step S02 is to provide a first fixed substrate 2 . In this embodiment, the first fixed substrate 2 is a light-transmitting substrate and a flexible substrate, which can be in the shape of a plate or a sheet. The material of the first fixed substrate 2 can include plastic, such as polyethylene terephthalate (Polyethylene Terephthalate, PET), polycarbonate (Polycarbonate, PC), polystyrene (Polystyrene, PS) or acrylic (Polymethyl Methacrylate, PMMA). In addition, the first fixed substrate 2 may have a microstructure 21, such as a microconcave-convex structure, a microlens, and a multi-layer coating, to change the light path of light and achieve the purpose of scattering or concentrating light. The microstructure 21 can also be a functional layer, for example, to achieve functions such as anti-scratch, anti-ultraviolet or anti-finger marks. The microstructure 21 in this embodiment is an example of a micro-concave-convex structure. In addition, the first fixed substrate 2 can be made by adding scattering particles.

Fig. 4 is a schematic diagram of steps S03-S05 in Fig. 1, wherein, step S03 is aligning the first glass carrier 111 and the first fixed substrate 2, and step S04 is bonding the first glass carrier 111 and the first fixed substrate 2. Step S05 is to bend the first fixed substrate 2 so that the display module 1 is bent together.

In this embodiment, the first fixed substrate 2 can be aligned with the first glass carrier 111 by a positioning machine, and after the alignment, the first glass carrier 111 is bonded to the first fixed substrate 2 . In the present invention, in addition to using a single adhesive material for bonding, an adhesive material with multiple adhesive materials can also be used for bonding.

As shown in FIG. 5 , the adhesive material 3 of this embodiment includes a strip of glue 31 and a watery glue 32 . In this embodiment, the refractive index of the ribbon glue 31 and/or the water glue 32 may be similar to that of glass. Here, the tape-shaped glue 31 is, for example, OCA (octyl-α-Cyanoacrylate) glue, and the water-like glue 32 is, for example, SVR glue.

In terms of manufacturing process, the strip-shaped glue 31 can be set on the first fixed substrate 2 by rollers firstly, and then the water-like glue 32 can be set on the strip-shaped glue 31 . Then, the first fixed substrate 2 and the first glass carrier 111 are bonded together by the tape glue 31 and the water glue 32 . Of course, in another way, the strip glue 31 can also be arranged on the first glass carrier 111 of the display module 1, and then the water glue 32 can be placed on the strip glue 31, and the first glass carrier 111 and the second glass carrier can be bonded together. A fixed substrate 2 .

In this embodiment, the problem of only using a single glue material in the manufacturing process can be solved by combining the strip glue 31 and the water glue 32 . Although the adhesive strip 31 has strong viscosity, if only the adhesive strip is used, air bubbles are easily formed between the first glass carrier 111 and the first fixed substrate 2 . In addition, when using tape adhesive for bonding, the relative position between the first fixed substrate 2 and the first glass carrier 111 needs to be positioned by suction, and the suction is easy to damage the thinned first glass carrier 111 and its upper surface. components. In addition, although the water-like glue 32 is not easy to generate air bubbles after bonding, its viscosity is weak and it is easy to cause peeling. Therefore, in this embodiment, the water-like glue 32 is in direct contact with the first glass carrier 111, and most of the strip-shaped glue 31 is not in direct contact with the first glass carrier 111, thereby avoiding the generation of air bubbles. The glue 32 can be reinforced by the strip glue 31, thus avoiding the phenomenon of peeling off.

Please refer to FIG. 4 again. After bonding, force is applied to the first fixed substrate 2 to make it bend, so that the display module 1 bonded to the first fixed substrate 2 bends together to form a curved display panel P1. In this embodiment, by applying force to both ends of the first fixed substrate 2, it is bent to a radius of curvature between 10 mm and 500 mm, and the first fixed substrate 2 faces one side of the display module 1. The surface can be curved as a concave surface (Concave) or a convex surface (Convex), and the concave surface is used as an example here. Of course, the surface of the first fixed substrate 2 facing the display module 1 may also be curved to form a combination of concave and convex surfaces, which is not limited in the present invention.

In the curved display panel P1, the first glass carrier 111 has a first curved surface C1, the first fixed substrate 2 has a second curved surface C2, and the two curved surfaces C1 and C2 are arranged opposite to each other through an adhesive material 3. glue. The radius of curvature of the first curved surface C1 and the second curved surface C2 is between 10 mm and 500 mm. The first curved surface C1 and the second curved surface C2 are a combination of a concave surface and a convex surface. Here, the first curved surface C1 is a convex surface, and the second curved surface C2 is a concave surface. In addition, the microstructure 21 of the first fixed substrate 2 is located on a surface of the first fixed substrate 2 facing away from the second curved surface C2.

After bending, the manufacturing method can further include curing the adhesive material 3, which can be implemented according to the curing characteristics of the adhesive material 3. For example, if the adhesive material 3 is a light-curable adhesive or a heat-curable adhesive, light-curable or thermal solidify. After curing, two polarizers (not shown) can be arranged on the surface of the second glass carrier 121 of the second substrate 12 and the surface of the first fixed substrate 2 respectively; Afterwards, the second glass carrier plates 111 and 121 are respectively disposed on the surfaces of the first and second glass carrier plates 111 and 121 .

It is worth mentioning that since the refractive index of the tape-shaped glue 31 and/or the water-like glue 32 is close to that of glass, it is possible to prevent the light from generating a large angle between the first curved surface C1 and the second curved surface C2. refraction, so that the brightness of the curved display panel P1 can be improved.

The above embodiment is an example where the first substrate 11 is a thin film transistor substrate and the second substrate 12 is a color filter substrate, that is, the first fixed substrate 2 is closer to the second thin film transistor substrate. Figure 6 shows another curved display panel P2, in Figure 6, the first substrate 11' is a color filter substrate, and the second substrate 22' is a thin film transistor substrate, that is, the first fixed substrate 2' is closer to the color filter substrate . There is an element layer 112' on the first glass carrier 111' of the first substrate 11', which mainly includes a color filter layer, a black matrix layer and a common electrode layer. There is another device layer 122' on the second glass carrier 121' of the second substrate 12', which mainly includes a thin film transistor and a pixel electrode layer. The first fixed substrate 2' is glued on the first glass carrier 111' of the first substrate 11'. The first glass carrier 111 ′ has a first curved surface C1 ′, the first fixed substrate 2 ′ has a second curved surface C2 ′, and the two curved surfaces C1 ′ and C2 ′ are respectively a convex surface and a concave surface matched with each other. Since the manufacturing method of the curved display panel P2 can follow the manufacturing method of the curved display panel P1 , it will not be repeated here.

In addition, since the display module 1 in the above embodiment is an example of a liquid crystal display module, the first fixed substrates 2, 2' need to be light-transmitting substrates, and the adhesive material 3 needs to be light-transmitting adhesive material. Of course, in other embodiments, such as an organic light emitting diode display module or an electronic paper display module that emits light from one side, the first fixed substrate and the adhesive material do not need to transmit light.

Please refer to FIG. 7 and FIG. 8 , which respectively show curved display devices 4 and 5 composed of curved display panels P1 and P2 of the present invention. The curved display panels P1 , P2 can form curved display devices 4 , 5 together with required components, such as backlight modules, driving circuits, and frames. The curved display devices 4 and 5 are respectively a concave display device and a convex display device. Here, a concave display device or a convex display device is defined by the concave or convex display surface facing the viewer.

9 shows another curved display panel P3, which is similar to the curved display panel P1, except that the curved display panel P3 further has a second fixed substrate 6, and the second glass carrier 121 has a third curved surface C3. The second fixed substrate 6 has a fourth curved surface C4 opposite to the third curved surface C3, and the adhesive material 3 mentioned in the above embodiment is further bonded to the third curved surface C3 and the fourth curved surface C4. A radius of curvature of the third curved surface C3 and the fourth curved surface C4 is, for example, between 10 mm and 500 mm. The third curved surface C3 and the fourth curved surface C4 are respectively a concave surface and a convex surface matched with each other. In addition, the material of the second fixed substrate 6 is the same as that of the first fixed substrate 2 , which will not be repeated here. In addition, similar to the first fixed substrate 2 , the second fixed substrate 6 may also have a microstructure 61 disposed on a surface of the second fixed substrate 6 facing away from the fourth curved surface C4 . The structure and function of the microstructure 61 are similar to the microstructure 21 of the first fixed substrate 2 , and will not be repeated here.

The manufacturing method of the curved display panel P3 is similar to the manufacturing method of the curved display panel P1, the difference is that the curved display panel P3 further includes a second fixing process for aligning the first fixed substrate 2 and the first glass carrier 111. Alignment of the substrate 6 and the second glass carrier 121 . In addition, the step of bonding the first glass carrier 111 to the first fixed substrate 2 further includes bonding the second glass carrier 121 to the second fixed substrate 6 . In addition, the step of bending the first fixed substrate 2 further includes bending the second fixed substrate 6 , that is, bending the first fixed substrate 2 and the second fixed substrate 6 at the same time. Since the curved display panel P3 of this embodiment has the first fixed substrate 2 and the second fixed substrate 6 , the display module 1 can be better protected and the display module 1 can be more stably maintained in a curved state.

10 shows another curved display panel P4, which is similar to the curved display panel P2, the difference is that the curved display panel P4 further has a second fixed substrate 6', and the second glass carrier 121' has a third curved surface C3 '. The second fixed substrate 6' has a fourth curved surface C4' opposite to the third curved surface C3', and the adhesive material 3 mentioned in the above embodiment is more bonded to the third curved surface C3' and the fourth curved surface. Face C4'. A radius of curvature of the third curved surface C3 ′ and the fourth curved surface C4 ′ is, for example, between 10 mm and 500 mm. The third curved surface C3' and the fourth curved surface C4' are respectively a concave surface and a convex surface matched with each other. In addition, the material of the second fixed substrate 6 ′ is the same as that of the first fixed substrate 2 ′, which will not be repeated here. The manufacturing method of the curved display panel P4 can follow the manufacturing method of the curved display panel P3, so it will not be repeated here. In addition, the advantages of the curved display panel P4 of this embodiment are similar to those of the curved display panel P3 of FIG. 9 .

To sum up, according to the curved display panel and the manufacturing method thereof of the present invention, the display module having the first glass carrier and the first fixed substrate are aligned and bonded, and then the first fixed substrate is bent by applying force. so that the display module is bent together. Since the present invention does not directly apply force to the first glass carrier to make it bend, but applies force to the first fixed substrate and bends the first glass carrier together, thereby avoiding the occurrence of stress concentration on the first glass carrier. In turn, the display module is protected and the yield rate is improved. In addition, the adhesive material used to bond the first glass carrier plate and the first fixed substrate in the present invention includes tape glue and water glue, through glue materials with different characteristics (for example, the tape has strong adhesiveness but when attached Easy to produce air bubbles, water-like adhesives are weak but not easy to form air bubbles) to achieve better bonding effect and improve product yield.

The above descriptions are illustrative only, not restrictive. Any equivalent modifications or changes made without departing from the spirit and scope of the present invention shall be included in the appended claims.

Claims (31)

1, a kind of curved face display panel comprises:

Display module has one first glass support plate, and this first glass support plate has one first flexure plane;

First fixing base has second flexure plane that is oppositely arranged with this first flexure plane; And

Bonding material, bonding this first flexure plane and this second flexure plane.

2, curved face display panel as claimed in claim 1, wherein this first fixing base is a transparent substrates.

3, curved face display panel as claimed in claim 1, wherein this first fixing base is a flexible base plate.

4, curved face display panel as claimed in claim 1, wherein the thickness of this first glass support plate is smaller or equal to 0.2mm.

5, curved face display panel as claimed in claim 1, wherein this first fixing base has a microstructure.

6, curved face display panel as claimed in claim 5, wherein this microstructure is arranged at the surface of this first fixing base back to this second flexure plane.

7, curved face display panel as claimed in claim 1, wherein this display module has one first substrate and one second substrate, and this first substrate has this first glass support plate and is oppositely arranged with this second substrate, and this first fixing base is near this first substrate.

8, curved face display panel as claimed in claim 7, wherein this first substrate is a thin film transistor base plate, this second substrate is a colored optical filtering substrates.

9, curved face display panel as claimed in claim 7, wherein this first substrate is a colored optical filtering substrates, this second substrate is a thin film transistor base plate.

10, curved face display panel as claimed in claim 7, also has one second fixing base, and this second substrate has one second glass support plate, wherein this second glass support plate has one the 3rd flexure plane, this second fixing base has the 4th flexure plane that is oppositely arranged with the 3rd flexure plane, and also bonding the 3rd flexure plane of this bonding material and the 4th flexure plane.

11, curved face display panel as claimed in claim 10, wherein the thickness of this second glass support plate is smaller or equal to 0.2mm.

12, curved face display panel as claimed in claim 10, wherein this second fixing base has a microstructure.

13, curved face display panel as claimed in claim 12, wherein this microstructure is arranged at the surface of this second fixing base back to the 4th flexure plane.

14, curved face display panel as claimed in claim 10, wherein a radius-of-curvature of the 3rd flexure plane and the 4th flexure plane is between between the 10mm to 500mm.

15, curved face display panel as claimed in claim 1, wherein a radius-of-curvature of this first flexure plane and this second flexure plane is between between the 10mm to 500mm.

16, curved face display panel as claimed in claim 1, wherein this bonding material is the bonding material of a printing opacity.

17, curved face display panel as claimed in claim 1, wherein this display module is a LCD MODULE, an Organic Light Emitting Diode display module, an Electronic Paper display module or a light-emitting diode display module.

18, curved face display panel as claimed in claim 1, wherein this bonding material comprises a band of glue and a watery glue.

19, curved face display panel as claimed in claim 18, wherein this band of glue is an OCA glue.

20, curved face display panel as claimed in claim 18, wherein this watery glue is SVR glue.

21, curved face display panel as claimed in claim 18, wherein the refractive index of this band of glue and/or this watery glue is similar to the refractive index of glass.

22, a kind of manufacture method of curved face display panel comprises:

One display module with one first glass support plate is provided;

One first fixing base is provided;

This first glass support plate of contraposition and this first fixing base;

Bonding this first glass support plate and this first fixing base; And

Crooked this first fixing base is so that this display module is together crooked.

23, manufacture method as claimed in claim 22 wherein before bonding this first glass support plate and this first fixing base, also comprises:

This first glass support plate of attenuate.

24, manufacture method as claimed in claim 23, wherein this first glass support plate is thinned to its thickness smaller or equal to 0.2mm.

25, manufacture method as claimed in claim 23, wherein this first glass support plate is by chemical mode and/or physics mode and attenuate.

26, manufacture method as claimed in claim 22, wherein this first fixing base is curved to the one radius-of-curvature between between the 10mm to 500mm.

27, manufacture method as claimed in claim 22, the method of wherein bonding this first glass support plate and this first fixing base comprises that this bonding material comprises a band of glue and a watery glue by bonding this first glass support plate of a bonding material and this first fixing base.

28, manufacture method as claimed in claim 27 wherein also comprises behind crooked this first fixing base:

Curing this bonding material between this first fixing base and this first glass support plate.

29, manufacture method as claimed in claim 27, the step of wherein bonding this first glass support plate and this first fixing base comprises:

This band of glue is set on this first fixing base; And

This watery glue is set on this band of glue.

30, manufacture method as claimed in claim 27, the step of wherein bonding this first glass support plate and this first fixing base comprises:

This band of glue is set on this first glass support plate; And

This watery glue is set on this band of glue.

31, manufacture method as claimed in claim 22, wherein this display module also has one second glass support plate, and in the step that this first fixing base is provided, also comprise one second fixing base is provided, in the step of this first glass support plate of contraposition and this first fixing base, also comprise this second glass support plate of contraposition and this second fixing base, in the step of this first glass support plate of gluing and this first fixing base, also comprise bonding this second glass support plate and this second fixing base, in the step of crooked this first fixing base, also comprise crooked this second fixing base.

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