CN111025764A

CN111025764A - Display device

Info

Publication number: CN111025764A
Application number: CN202010015082.2A
Authority: CN
Inventors: 何忠兴
Original assignee: AU Optronics Corp
Current assignee: AU Optronics Corp
Priority date: 2019-05-16
Filing date: 2020-01-07
Publication date: 2020-04-17
Anticipated expiration: 2040-01-07
Also published as: CN111025764B; TWI696871B; TW202043880A

Abstract

A display device comprises at least two display panels and at least two optical film sets. The at least two display panels comprise a first display panel and a second display panel, and the first display panel and the second display panel are arranged adjacently. The at least two optical film sets include a first optical film set and a second optical film set, the first optical film set is disposed under the first display panel corresponding to the first display panel and includes at least one first optical film. The second optical film set is arranged under the second display panel corresponding to the second display panel and comprises at least one second optical film; the first optical diaphragm group is adjacent to the second optical diaphragm group, and the at least one first optical diaphragm is overlapped with the at least one second optical diaphragm on the adjacent side.

Description

Display device

Technical Field

The present invention relates to a display device, and more particularly, to a display device having at least two display regions.

Background

In a display device having a plurality of display modules and a plurality of display areas, a plurality of backlight modules are adopted to respectively match with each display module in the prior art to provide a light source required by the display of the display module; due to the difference of the backlight module and the display module, there will be differences of brightness and color between the display areas. Although a single backlight module can be used to match with a plurality of display modules, when the size of the backlight module is large, the required space is also large, and the narrow frame design is difficult to realize.

Disclosure of Invention

The invention provides a display device, which comprises at least two optical film groups, which is beneficial to realizing narrow frame design.

The display device provided by the invention comprises at least two display panels and at least two optical film sets. The at least two display panels comprise a first display panel and a second display panel, and the first display panel and the second display panel are arranged adjacently. The at least two optical film sets include a first optical film set and a second optical film set, the first optical film set is disposed on the bottom side of the first display panel corresponding to the first display panel and includes at least one first optical film. The second optical diaphragm group is arranged on the bottom surface side of the second display panel corresponding to the second display panel and comprises at least one second optical diaphragm; the first optical diaphragm group is adjacent to the second optical diaphragm group, and the at least one first optical diaphragm is overlapped with the at least one second optical diaphragm on the adjacent side.

In an embodiment of the invention, the first display panel and the second display panel are arranged in parallel, the first display panel has a first display area, the second display panel has a second display area, and the first display area and the second display area are separated by a distance D; the at least one first optical film and the at least one second optical film form an overlapping portion, the overlapping portion has a first width W1, and the first width W1 is not greater than the distance D.

In an embodiment of the invention, the at least one first optical film has a first length L1, the at least one second optical film has a second length L2, and the first length L1, the second length L2, the first width W1 and the distance D satisfy the following relation: ((L1+ L2)/2) χ ≦ W1 ≦ D.

In an embodiment of the invention, the overlapped portion of the at least one first optical film and the at least one second optical film, which are contracted, further has a second width W2, the overlapped portion of the at least one first optical film and the at least one second optical film, which are expanded, further has a third width W3, and W2 < W1 < W3.

In an embodiment of the invention, the display device further includes a back plate and a light source module; the at least two optical film sets and the light source module are arranged on the back plate, and the back plate is provided with at least one side wall surrounding the at least two optical film sets.

In an embodiment of the invention, the display device further includes a cover plate disposed on top surfaces of the at least two display panels; the cover plate comprises at least two light-transmitting areas and at least one light-shielding area surrounding the at least two light-transmitting areas, wherein the at least one light-shielding area shields the overlapped part of the at least one first optical film and the at least one second optical film.

In an embodiment of the invention, the light source module includes a light guide element, the light guide element has a light exit surface and a groove, the groove is formed on the light exit surface, the at least one first optical film and the at least one second optical film are disposed on the light exit surface, and the overlapping portion corresponds to the groove.

In an embodiment of the invention, a side of the at least one first optical film corresponds to and is fixed to the at least one sidewall; one side of the at least one second optical film corresponds to the at least one side wall and is fixed on the at least one side wall.

In an embodiment of the invention, the display device further includes a frame disposed on the back plate and carrying at least two display panels; the frame piece is provided with at least two hollow-out areas which respectively correspond to at least two display panels.

In an embodiment of the invention, the side of the at least one first optical film further has a first engaging member, the side of the at least one second optical film further has a second engaging member, the at least one sidewall has at least two engaging portions, and the first engaging member and the second engaging member are engaged with the at least two engaging portions.

The invention adopts at least two optical film sets, and the optical film in one optical film set is overlapped with the optical film in the other optical film set, thereby being beneficial to the design of narrow frames.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a schematic cross-sectional view of a display device according to an embodiment of the invention.

Fig. 2 is a schematic top view of the embodiment shown in fig. 1.

FIG. 3 is a schematic cross-sectional view of another state of the embodiment shown in FIG. 1.

Fig. 4 is a schematic cross-sectional view of the embodiment of fig. 1 in yet another state.

Fig. 5 is a schematic top view of a portion of the embodiment shown in fig. 1.

Description of reference numerals:

10: display device

100: display panel

100 a: a first display panel

100 b: second display panel

101: bottom surface

102: the top surface

110: first substrate

120: second substrate

150 a: a first display region

150 b: a second display region

200: optical film group

200 a: first optical film group

200 b: second optical film group

210: first optical film

2100: side edge

215: first fastener

220: second optical film

2200: side edge

225: second engaging member

300: back plate

310: base plate

320. 320a, 320b, 320c, 320 d: side wall

325: engaging part

400: light source module

450: light guide element

4500: light emitting surface

460: groove

500: cover plate

510: light-transmitting region

520: shading area

5200: light-shielding material

600: frame piece

610: first hollow-out area

620: second hollow-out area

660: groove

700: optical film

P: overlapping part

D: distance between two adjacent plates

W1: first width

W2: second width

W3: third width

L1: first length

L2: second length

Detailed Description

In the following text, the same elements will be denoted by the same reference numerals. Next, dimensions (e.g., length, width, thickness, and depth) of elements (e.g., layers, films, substrates, regions, etc.) in the drawings may be exaggerated in unequal scale for clarity of presentation of technical features of the present disclosure. Accordingly, the description and illustrations of the embodiments below are not limited to the sizes and shapes of elements shown in the drawings, but are intended to cover deviations in sizes, shapes and both that result from actual manufacturing processes and/or tolerances. For example, the flat surfaces shown in the figures may have rough and/or non-linear features, while the acute angles shown in the figures may be rounded. Therefore, the elements shown in the drawings of the present disclosure are for illustration purposes only and are not intended to accurately depict the actual shape of the elements nor be used to limit the claims of the present disclosure.

Second, relative terms, such as "lower" or "bottom" and "upper" or "top," may be used herein to describe one element's relationship to another element, as illustrated. It will be understood that relative terms are intended to encompass different orientations of the device in addition to the orientation depicted in the figures. For example, if the device in one of the figures is turned over, elements described as being on the "lower" side of other elements would then be oriented on "upper" sides of the other elements. Thus, the exemplary term "lower" can include both an orientation of "lower" and "upper," depending on the particular orientation of the figure. Similarly, if the device in one of the figures is turned over, elements described as "below" or "beneath" other elements would then be oriented "above" the other elements. Thus, the exemplary terms "below" or "beneath" can encompass both an orientation of above and below.

Fig. 1-2 are a schematic cross-sectional view and a schematic top view of a display device according to an embodiment of the invention. As shown in fig. 1-2, the display device 10 includes at least two display panels 100. In this embodiment, the at least two display panels 100 include a first display panel 100a and a second display panel 100b, and the first display panel 100a and the second display panel 100b are disposed adjacent to each other. The areas and/or sizes of the first display panel 100a and the second display panel 100b may be equal or different.

Each display panel 100, such as the first display panel 100a and the second display panel 100b, may include a first substrate 110, a second substrate 120, and a display medium layer (not shown), and the upper surface and the lower surface of the display panel 100 may be respectively provided with an optical sheet 700, such as a polarizer. The display medium layer is, for example, sealed between the first substrate 110 and the second substrate 120. The first substrate 110 and the second substrate 120 may include a light-transmissive substrate, such as a glass substrate, a plastic substrate, or a quartz substrate. In one embodiment, the display panel 100 is, for example, a liquid crystal display panel, wherein the first substrate 110 includes, for example, a color filter layer, the second substrate 120 includes, for example, a pixel array and a peripheral circuit, and the display medium layer includes a plurality of liquid crystal molecules. The present invention does not limit the kind of the display panel 100.

The display device 10 further includes at least two optical film sets 200. In this embodiment, the at least two optical film sets 200 include a first optical film set 200a and a second optical film set 200 b. The first optical film set 200a is disposed under the first display panel 100a corresponding to the first display panel 100a, i.e. on the bottom surface 101 side of the first display panel 100a, and includes at least one first optical film 210. The second optical film set 200b is disposed under the second display panel 100b corresponding to the second display panel 100b, i.e. on the bottom surface 101 side of the second display panel 100b, and includes at least one second optical film 220, wherein the first optical film set 200a is adjacent to the second optical film set 200b, and the at least one first optical film 210 overlaps the at least one second optical film 220 on the adjacent side. In one embodiment, the first optical film set 200a includes a plurality of first optical films 210, the second optical film set 200b includes a plurality of second optical films 220, and each first optical film 210 overlaps with an adjacent second optical film 220. It is noted that the sizes of the first optical film set 200a and the second optical film set 200b may be equal or different. For example, the area of at least one first optical film 210 in the first optical film set 200a may be different from the area of at least one second optical film 220 in the second optical film set 200b according to the first display panel 100a and the second display panel 100b with different sizes.

The first optical film 210 and the second optical film 220 may be a diffusion sheet or a brightness enhancement film, for example. In one embodiment, the first optical film group 200a comprises a diffusion sheet and a brightness enhancement film in sequence from the side adjacent to the first display panel 100a, and the second optical film group 200b comprises a diffusion sheet and a brightness enhancement film from the side adjacent to the second display panel 100b, and the diffusion sheet of the first optical film group 200a overlaps with the diffusion sheet of the second optical film group 200b, and the brightness enhancement film overlaps with the brightness enhancement film of the second optical film group 200 b.

As shown in fig. 1-2, in the present embodiment, the first display panel 100a and the second display panel 100b are adjacent and parallel, and the first display panel 100a has a first display area 150a and a frame area (not shown) surrounding the first display area 150 a. The second display panel 100b has a second display region 150b and a frame region (not shown) surrounding the second display region 150b, wherein the areas and/or sizes of the second display region 150b and the first display region 150a may be equal or different. The first display area 150a and the second display area 150b are spaced apart by a distance D, and a first optical film set 200a and a second optical film set 200b are adjacent to each other and the first optical film 210 and the second optical film 220 are overlapped. The overlap P formed by the first optical film 210 and the second optical film 220 has a first width W1, and the first width W1 is not greater than the distance D, i.e., W1 ≦ D.

According to an embodiment of the present invention, the at least one first optical film 210 has a first length L1, and the at least one second optical film 220 has a second length L2, wherein the areas of the first optical film 210 and the second optical film 220 may be equal or different, and the first length L1 and the second length L2 may be equal or different. It should be noted that the at least one first optical film 210 and the at least one second optical film 220 have expansion and contraction characteristics. When the first optical film 210 and the second optical film 220 expand due to heat, the area of the optical films increases and the edges increase. The first width W1 is a side length of the overlapping portion P of the at least one first optical film 210 and the at least one second optical film 220 without expansion and contraction. The relationship between the first length L1, the second length L2, and the first width W1 is according to the following equation: ((L1+ L2)/2) χ ≦ W1 ≦ D. That is, the value of the average length ((L1+ L2)/2) of the at least one first optical film 210 and the at least one second optical film 220 multiplied by the coefficient χ is smaller than or equal to the first width W1. The coefficient χ may be related to the coefficient of expansion and contraction of the optical film. In one embodiment, χ is 1/100. It should be noted that the present embodiment does not limit the optical films of the display device 100, and different optical films have different expansion and contraction coefficients. For example, the overlapping portion P, the degree of overlapping may be made larger as the expansion coefficient is larger, so that the first optical film 210 and the second optical film 220 may maintain the overlapping when the optical films are contracted.

As described above. According to an embodiment of the present invention, the average length of the at least one first optical film 210 and the at least one second optical film 220 may be the average length of the diffuser of the first optical film set 200a and the diffuser of the second optical film set 200b, and the average length of the brightness enhancement film of the first optical film set 200a and the brightness enhancement film of the second optical film set 200 b.

According to a state of the present embodiment, as shown in fig. 3, when the first and second

optical films

210 and 220 shrink when they are cooled, the areas of the first and second

optical films

210 and 220 may become smaller and the side length may be shortened, that is, the width of the overlapped portion becomes the second width W2, and the second width W2 is smaller than the first width W1. According to another state of the present embodiment, as shown in fig. 4, the first and second

optical films

210 and 220 are thermally expanded, and at this time, the areas of the first and second

optical films

210 and 220 may become large and the side length increases, that is, the width of the overlapped portion becomes the third width W3, and the third width W3 is greater than the first width W1. Since the first optical film 210 and the second optical film 220 are overlapped and re-expanded, a space is occupied to a small extent due to the expansion. That is, the first optical film 210 expands toward the space where the second optical film 220 has been originally disposed, and the second optical film 220 expands toward the space where the first optical film 210 has been originally disposed, thereby reducing the degree of occupying additional space. In addition, compared to using a single optical film set with a larger area, in the embodiment of the invention, the optical films of at least two optical film sets 200, such as the first optical film 210 and the second optical film 220, have smaller areas, so that the amount of change of the area and the side length caused by expansion is smaller, thereby saving space.

The display device 10 further includes a back plate 300 and a light source module 400. The light source module 400 is used to provide light sources for at least two display panels 100 to display. That is, the first display panel 100a and the second display panel 100b can be provided with light sources by the same light source module 400. As shown in fig. 1 and 3-4, the light source module 400, the first optical film set 200a and the second optical film set 200b are disposed on the back plate 300. The backplate 300 includes a bottom plate 310 and at least one sidewall 320. At least one sidewall 320 surrounds the first optical film set 200a and the second optical film set 200 b.

According to an embodiment of the present invention, a side of the at least one first optical film 210 corresponds to the at least one sidewall 320 of the backplate 300 and is fixed to the at least one sidewall 320, and a side of the at least one second optical film 220 also corresponds to the at least one sidewall 320 of the backplate 300 and is fixed to the at least one sidewall 320. In one embodiment, the at least one first optical film 210 and the at least one second optical film 220 are respectively fixed on two opposite sidewalls 320 of the backplate 300. As shown in fig. 5, the side 2100 of the at least one first optical film 210 is fixed to the sidewall 320a, and the side 2200 of the at least one second optical film 220 is fixed to the sidewall 320b, and the sidewall 320a is opposite to the sidewall 320 b. The first optical film 210 and/or the second optical film 220 may also be fixed to the sidewalls 320c and 320 d. The fixing can be realized by means of a convex part and a clamping groove, a hole part, a convex column and the like. The invention is not limited to the manner of fixing the optical film to the back plate 300. As shown in fig. 5, the side 2100 of the at least one first optical film 210 further has a first engaging member 215, the side 2200 of the at least one second optical film 220 further has a second engaging member 225, and the sidewalls 320a and 320b have at least two engaging portions 325. When the first optical film set 200a and the second optical film set 200b are disposed on the backplate 300, the first engaging member 215 of the first optical film 210 and the second engaging member 225 of the second optical film 220 are engaged with the engaging portions 325.

As described above, the side walls 320 limit the degree of displacement of the first optical film 210 and the second optical film 220 with respect to the back plate 300. Even if the first optical film 210 and the second optical film 220 contract or expand to deform reciprocally, the fixing helps to maintain the relative positions of the first optical film 210 and the second optical film 220 with the sidewall 320 and the backplate 300, and further maintain the relative positions of the first optical film 210 with the first display panel 100a and the second optical film 220 with the second display panel 100 b. Furthermore, since the first optical film 210 and the second optical film 220 can expand to the space occupied by each other, relatively little space or no space can be reserved in the back plate 300 for the expansion of the first optical film 210 and the second optical film 220. For example, allowing the first and second

optical films

210 and 220 to be disposed close to the sidewall 320 also allows the back plate 300 to have a smaller internal space, which facilitates a narrow bezel design.

In the present embodiment, the light source module 400 includes a light source (not shown) and a light guide element 450. The light guide element 450 has a light emitting surface 4500, the light emitting surface 4500 faces the first display panel 100a and the second display panel 100b, and the first optical film set 200a and the second optical film set 200b are disposed on the light emitting surface 4500 side. The light guiding element 450 may further have a groove 460 formed on the light emitting surface 4500. The width of the groove 460 is preferably greater than the third width W3. The overlapping portion P of the first optical film 210 and the second optical film 220 may correspond to the groove 460, and the groove 460 may accommodate the overlapping portion P of the first optical film 210 and the second optical film 220, and may be used to reduce the film overlapping height that is relatively higher than the light emitting surface 4500. Further, it contributes to reduction in thickness of the display device 10.

The display device 10 may also include a frame member 600. The frame 600 is disposed on the backplate 300 and carries at least two display panels 100. The frame 600 may have a first hollow area 610 corresponding to the first display area 150a of the first display panel 100a, and a second hollow area 620 corresponding to the second display area 150b of the second display panel 100 b. Furthermore, the frame 600 can fix the first optical film set 200a and the second optical film set 200 b. The frame 600 may form a groove 660, and the groove 660 may further correspond to the overlapping portion P of the at least one first optical film 210 and the at least one second optical film 220 to serve as a space for accommodating the overlapping portion P. The fixing manner of the optical film by the frame 600 can refer to the fixing manner between the optical film and the back plate 300.

As shown in fig. 1-4, the display device 10 of the present embodiment further includes a cover 500 disposed on at least two display panels 100. The cover 500 may be attached to the top surfaces 102 of the at least two display panels 100, but the invention is not limited to the manner in which the cover 500 and the at least two display panels 100 are fixed to each other. Moreover, the frame 600 may also carry the cover plate 500 configured with at least two display panels 100. The cover plate 500 serves as a protective cover and may be a touch panel. The cover plate 500 includes at least two light-transmitting regions 510 and at least one light-shielding region 520 surrounding the at least two light-transmitting regions 510, wherein the light-shielding region 520 can be formed by, for example, printing a light-shielding material 5000. The light-transmitting area 510 corresponds to the first display area 150a and the second display area 150b, and the light-shielding area 520 corresponds to the frame area and shields the optical film assembly 200 and the light source module 400 outside the first display area 150a and the second display area 150 b.

As previously described. The first display area 150a and the second display area 150b are spaced apart by a distance D. The interval between the first display region 150a and the second display region 150b may correspond to the light-shielding region 520. According to an embodiment of the present invention, the width of the light-shielding region 520 may correspond to the distance D. Under the gap, the at least one first optical film 210 overlaps the at least one second optical film 220, i.e., the overlapping portion P of the at least one first optical film 210 and the at least one second optical film 220 is located under the light-shielding region 520 and shielded by the light-shielding region 520. According to an embodiment of the invention, a width of the overlapping portion P, such as the first width W1, is less than or equal to 1/10 of the width of the light shielding region 520, but not limited thereto. Even if at least one of the first optical films 210 or at least one of the second optical films 220 is slightly bent due to overlapping, the light shielding region 520 can be effectively shielded.

Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.

Claims

1. A display device, comprising:

at least two display panels including a first display panel and a second display panel, the first display panel and the second display panel being disposed adjacent to each other;

at least two optical film sets including a first optical film set and a second optical film set, the first optical film set is configured on a bottom surface side of the first display panel corresponding to the first display panel and comprises at least one first optical film, the second optical film set is configured on a bottom surface side of the second display panel corresponding to the second display panel and comprises at least one second optical film; the first optical diaphragm group is adjacent to the second optical diaphragm group, and the at least one first optical diaphragm is overlapped with the at least one second optical diaphragm on the adjacent side.

2. The display device according to claim 1, wherein the first display panel and the second display panel are disposed in parallel, the first display panel has a first display area, the second display panel has a second display area, and the first display area and the second display area are separated by a distance D; the at least one first optical film and the at least one second optical film form an overlapping portion, the overlapping portion has a first width W1, and the first width W1 is not greater than the distance D.

3. The display device of claim 2, wherein the at least one first optical film has a first length L1, the at least one second optical film has a second length L2, and the first length L1, the second length L2, the first width W1 and the distance D satisfy the following relation: ((L1+ L2)/2) χ ≦ W1 ≦ D.

4. The display device of claim 3, wherein χ is 1/100.

5. The display device of claim 2, wherein the at least one first optical film and the at least one second optical film contract and the overlapping portion further has a second width W2, the at least one first optical film and the at least one second optical film expand and the overlapping portion further has a third width W3, and W2 < W1 < W3.

6. The display device of claim 1, further comprising a back plate and a light source module; the at least two optical film sets and the light source module are arranged on the back plate, and the back plate is provided with at least one side wall surrounding the at least two optical film sets.

7. The display device of claim 1, further comprising a cover plate disposed on a top surface of the at least two display panels; the cover plate comprises at least two light-transmitting areas and at least one light-shielding area surrounding the at least two light-transmitting areas, wherein the at least one light-shielding area shields the overlapped part of the at least one first optical film and the at least one second optical film.

8. The display device as claimed in claim 6, wherein the light source module comprises a light guide element having a light-emitting surface and a groove formed on the light-emitting surface, the at least one first optical film and the at least one second optical film are disposed on the light-emitting surface, and the overlapping portion corresponds to the groove.

9. The display device of claim 6, wherein a side of the at least one first optical film corresponds to and is fixed to the at least one sidewall; one side of the at least one second optical film corresponds to the at least one side wall and is fixed on the at least one side wall.

10. The display device of claim 6, further comprising a frame disposed on the back plate and carrying the at least two display panels; the frame member has at least two hollow-out areas respectively corresponding to the at least two display panels.

11. The display device as claimed in claim 9, wherein the side of the at least one first optical film further has a first engaging member, the side of the at least one second optical film further has a second engaging member, the at least one sidewall has at least two engaging portions, and the first engaging member and the second engaging member are engaged with the at least two engaging portions.