Display device

Abstract

The present invention discloses a display device, which includes a back frame member, two light source structures, two display panels, an optical film sheet, and a reflective layer. The back frame member has an accommodation space, and the two light source structures are provided in the accommodation space. Each of the two light source structures has a light-emitting surface. The two display panels are respectively disposed overlapping the two light-emitting surfaces of the two light source structures. The optical film sheet is disposed between the two light source structures and the two display panels, and overlaps the two light-emitting surfaces of the two light source structures. The reflective layer is disposed between the two light source structures.

Description

Technical Field

[0001] The present invention relates to a display device, and particularly to a tiled display device. Background Art

[0002] A current display device is formed by tiling multiple display panels. Depending on different usage scenarios (such as in-vehicle applications), different display panels of this display device can be independently switched on and off. In certain application scenarios, only some of the display panels are turned on, and the corresponding backlights are turned on for illumination. However, some of the light generated by the turned-on backlights is likely to leak to the unturned-on display panels, causing serious light leakage. Summary of the Invention

[0003] The present invention provides a display device having multiple display panels, wherein when some of the display panels are turned on, the unturned-on display panels can still maintain good dark-state performance.

[0004] The display device of the present invention includes a back frame member, two light source structures, two display panels, an optical film, and a reflective layer. The back frame member has a receiving space, and two light source structures are disposed in the receiving space. Each of the two light source structures has a light-emitting surface. The two display panels are respectively disposed overlapping the two light-emitting surfaces of the two light source structures. The optical film is disposed between the two light source structures and the two display panels and overlaps the two light-emitting surfaces of the two light source structures. The reflective layer is disposed between the two light source structures.

[0005] Based on the above, in the display device according to an embodiment of the present invention, a reflective layer is disposed between two light source structures that are disposed in the same back frame member and respectively correspond to two display panels. Therefore, the light generated by the light source structures will not leak to the non-corresponding display panels, causing light leakage in the dark state of the display panels. In addition, instead of two optically separated optical films being disposed on the two light-emitting surfaces of the two light source structures, an optical film that continuously extends on the two light-emitting surfaces of the two light source structures is provided. Accordingly, the buffer space reserved between the two optical films due to consideration of the thermal expansion effect can be eliminated, which helps to reduce the size of the splicing area between the two display panels. Brief Description of the Drawings

[0006] Figure 1 is a cross-sectional schematic view of a display device of the present invention;

[0007] Figure 2A and Figure 2B is Figure 1 a front view schematic of the display device;

[0008] Figure 3 is Figure 1 an enlarged schematic of the optical film;

[0009] Figure 4A andFigure 4B is a front view schematic diagram of another display device of the present invention;

[0010] Figure 5 is a cross-sectional schematic diagram of yet another display device of the present invention;

[0011] Figure 6A and Figure 6B is Figure 5 the front view schematic diagram of the display device.

[0012] Symbol Explanation

[0013] 10, 10A, 20: Display device

[0014] 100: Back frame member

[0015] 110, 111, 112, 111A, 112A: Light guide plate

[0016] 110bs: Bottom surface

[0017] 110es: Light-emitting surface

[0018] 110fs: Far light surface

[0019] 110n: Notch

[0020] 110ss1: First side surface

[0021] 110ss2: Second side surface

[0022] 120: Light source

[0023] 121: Circuit board

[0024] 122: Circuit carrier board

[0025] 123, 123A: Light-emitting element

[0026] 130, 131, 132: Reflective sheet

[0027] 150, 155: Optical film

[0028] 151, 152: Prismatic lens

[0029] 151P, 152P: Prism structure

[0030] 170, 170A, 170B: Retaining wall structure

[0031] 171: Connecting portion

[0032] 173, 173A, 173B: Blocking portion

[0033] 200: Transparent cover plate

[0034] 210: Light-shielding pattern layer

[0035] CA: Accommodation space

[0036] DA1, DA2: Display area

[0037] DP1, DP2: Display panel

[0038] LB1, LB2: Light rays

[0039] LSS, LSS”, LSS-A1, LSS-A2: Light source structure

[0040] OP1, OP2: Opening

[0041] TA, TA”: Splicing area

[0042] X, Y, Z: Direction Detailed implementation manner

[0043] As used herein, "about", "approximately", "essentially", or "substantially" includes the stated value and the average value within an acceptable deviation range of the specific value determined by those of ordinary skill in the art, taking into account the specific amount of the measurement being discussed and the errors associated with the measurement (i.e., the limitations of the measurement system). For example, "about" may mean within one or more standard deviations of the stated value, or for example, within ±30%, ±20%, ±15%, ±10%, ±5%. Furthermore, "about", "approximately", "essentially", or "substantially" as used herein may, depending on the nature of the measurement, the nature of the cutting, or other properties, select a more acceptable deviation range or standard deviation, rather than applying a single standard deviation to all properties.

[0044] In the drawings, for clarity, the thickness of layers, films, panels, regions, etc. is exaggerated. It should be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element, or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, no intervening elements are present. As used herein, "connected" can refer to physical and / or electrical connection. Furthermore, "electrical connection" may mean that other elements are present between two elements.

[0045] Reference will now be made in detail to the exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Whenever possible, the same reference numerals will be used in the drawings and the description to refer to the same or like parts.

[0046] Figure 1 It is a cross-sectional schematic view of a display device according to the present invention. Figure 2A And Figure 2B IsFigure 1 Front view schematic diagram of the display device. Figure 3 is Figure 1 Enlarged schematic diagram of the optical film. For clear presentation, Figure 2A omits Figure 1 the connection part 171 of the retaining wall structure 170, the display panel DP1, the display panel DP2, the light-transmitting cover plate 200 and the light-shielding pattern layer 210 of , and Figure 2B only shows Figure 1 the light-shielding pattern layer 210, the light guide plate 111, the light guide plate 112 and the blocking part 173 of the retaining wall structure 170 of .

[0047] Please refer to Figures 1 to 2B , the display device 10 includes a back frame member 100, two backlight modules and two display panels. The two backlight modules are both disposed in the accommodation space CA of the back frame member 100. The two display panels are respectively disposed corresponding to the two backlight modules. In this embodiment, the backlight module includes a light source structure LSS, and the light source structure LSS includes a light guide plate 110 and a light source 120. The light guide plate 110 is provided with a light-emitting surface 110es of the light source structure LSS and an incident surface 110is connecting the light-emitting surface 110es. The light source 120 is disposed on one side of the incident surface 110is of the light guide plate 110.

[0048] In this embodiment, the light source 120 is, for example, a lamp board, and may include a circuit board 121 and a plurality of light-emitting elements 123 arranged on the surface of the circuit board 121 facing the light guide plate 110. For example, these light-emitting elements 123 may be arranged along the direction X on one side of the incident surface 110is of the light guide plate 110. The two light source structures LSS are arranged along the direction X.

[0049] Specifically, the light guide plate 110 is further provided with a first side surface 110ss1 and a second side surface 110ss2 that connect the light-emitting surface 110es and the incident surface 110is and face each other on the opposite sides along the direction X. In this embodiment, the light guide plate 111 of one of the two light source structures LSS and the light guide plate 112 of the other are arranged along the direction X, and the first side surface 110ss1 of the light guide plate 111 and the second side surface 110ss2 of the light guide plate 112 are arranged facing each other.

[0050] On the two light-emitting surfaces 110es of the light guide plates 111 and 112, a display panel DP1 and a display panel DP2 are respectively provided. That is, these two display panels are respectively arranged overlapping the two light-emitting surfaces 110es of the two light guide plates 110. In this embodiment, the display panel DP1 and the display panel DP2 respectively have a display area DA1 and a display area DA2, and a splicing area TA is provided between these two display panels. It should be noted that the overlapping relationship between the two components here is, for example, overlapping along the normal direction of the light-emitting surface 110es (such as the direction Z). Unless otherwise specifically mentioned below, the overlapping relationships described are defined in the same way and will not be elaborated further.

[0051] In this embodiment, a light-transmitting cover plate 200 may be attached to the two display panels, and a light-shielding pattern layer 210 is provided on the light-transmitting cover plate 200. The light-shielding pattern layer 210 has an opening OP1 defining the display area DA1 and an opening OP2 defining the display area DA2, and overlaps the splicing area TA along the direction Z.

[0052] Furthermore, in order to prevent the light generated by the two light source structures LSS from leaking to the non-corresponding display panel and causing light leakage of the display panel in the dark state, for example: preventing the light LB1 generated by the light source structure LSS overlapping the display panel DP1 from being transmitted to the display panel DP2, or preventing the light LB2 generated by the light source structure LSS overlapping the display panel DP2 from being transmitted to the display panel DP1, a reflective layer may also be provided between the two light source structures LSS.

[0053] For example, the backlight module may further include two reflective sheets 130, which are respectively arranged corresponding to the two light guide plates 110. Specifically, the light guide plate 110 is further provided with an incident light surface 110is connected thereto, and a bottom surface 110bs opposite to the light-emitting surface 110es, and a far-light surface 110fs connecting the bottom surface 110bs, the first side surface 110ss1, the second side surface 110ss2 and the light-emitting surface 110es. In this embodiment, the reflective sheet 130 is arranged between the light guide plate 110 and the back frame member 100, and covers the bottom surface 110bs, the first side surface 110ss1, the second side surface 110ss2 and the far-light surface 110fs of the light guide plate 110, but is not limited thereto.

[0054] It should be particularly noted that, in this embodiment, the combination of the part of the reflective sheet 131 covering the first side surface 110ss1 of the light guide plate 111 and the part of the reflective sheet 132 covering the second side surface 110ss2 of the light guide plate 112 can be used as the aforementioned reflective layer to prevent the light generated by the light source structure LSS from leaking to the non-corresponding display panel, but is not limited thereto.

[0055] In this embodiment, the display device 10 may further include a barrier structure 170 disposed between the reflector 131 and the reflector 132. Specifically, the barrier structure 170 includes a connecting portion 171 connecting to the back frame member 100 and a blocking portion 173. The blocking portion 173 is inserted between the light guide plates 111 and 112 and is connected to the connecting portion 171. For example, the blocking portion 173 of the barrier structure 170 may be made of rubber or other elastic materials. Accordingly, when the display device 10 is vibrated or impacted by an external force, the elastic blocking portion 173 can prevent the two light guide plates 110 from touching each other and generating abnormal sounds due to their small distance from each other. That is to say, in addition to blocking the two light guide plates 110, the blocking portion 173 also has a buffering function for the two light guide plates under external impact or vibration.

[0056] On the other hand, the barrier structure 170 is disposed overlapping the splicing area TA of the two display areas. More specifically, the barrier structure 170 (especially the blocking portion 173) extends from one side to the other side of the display area DA1 and the display area DA2 in the Y direction. However, the present invention is not limited thereto. According to other embodiments, the barrier structure may also extend discontinuously within the splicing area TA. In addition, in order to improve the connection stability between the barrier structure 170 and the back frame member 100, the contact area between the connecting portion 171 and the back frame member 100 can be increased, and a stable inverted T-shaped structure is formed with the blocking portion 173.

[0057] In this embodiment, the backlight module further includes an optical film 150 disposed between the two display panels and the two light source structures LSS and overlapping the two light-emitting surfaces 110es of the two light source structures LSS (or the light guide plates 110). Since there are not two optically separated films on the two light source structures LSS, but an optical film 150 that continuously extends on the two light-emitting surfaces 110es of the two light source structures LSS. Therefore, the extrusion effect caused by thermal expansion between the two optical films can be avoided. In other words, the two light source structures LSS share the same optical film 150, which can effectively reduce the size of the splicing area TA between the display area DA1 and the display area DA2.

[0058] Please also refer to Figure 3 , in order to increase the light collection of the backlight module, the optical film 150 of this embodiment may be a brightness enhancement film (BEF), for example, a combination of a prism sheet 151 and a prism sheet 152. For example, the extending directions of the multiple prism structures 151P on the prism sheet 151 may be perpendicular to the extending directions of the multiple prism structures 152P on the prism sheet 152, and the extending directions here are, for example, parallel to or perpendicular to the incident surface 110is of the light guide plate 110, but not limited thereto.

[0059] Some other embodiments will be listed below to illustrate the present invention in detail. Among them, the same components will be marked with the same symbols, and the description of the same technical content will be omitted. For the omitted part, please refer to the foregoing embodiments and will not be repeated hereinafter.

[0060] Figure 4A and Figure 4B is a front view schematic diagram of another display device according to the present invention. Please refer to Figure 4A and Figure 4B , the main difference between the display device 10A of this embodiment and the display device 10 of Figure 2A and Figure 2B is: the configuration of the barrier structure is different. Specifically, in this embodiment, the blocking portion 173A of the barrier structure 170A does not overlap the splicing area TA”. For example, the barrier structure 170A can be disposed on opposite sides of the light guide plates 111A and 112A along the direction Y, and each of the two light guide plates has two notches 110n on the side opposite to each other. The blocking portion 173A of the barrier structure 170A can extend into the notch 110n, but does not overlap the splicing area TA” between the two display areas.

[0061] By providing the above-mentioned notches 110n to accommodate the barrier structure 170A, the distance between the light guide plates 111A and 112A of the two light source structures LSS” can be further reduced. That is, in this embodiment, the width of the splicing area TA” along the arrangement direction of the display area DA1 and the display area DA2 (for example, the direction X) can be smaller than the width of the splicing area TA of Figure 2A along the arrangement direction of the two display areas, which helps to reduce the discontinuity of the image screens of the display panel DP1 and the display panel DP2 in the splicing area TA”.

[0062] Figure 5 is a cross-sectional schematic diagram of another display device according to the present invention. Figure 6A and Figure 6B are Figure 5 front view schematic diagrams of the display device. Please refer to Figures 5 to 6B , the main difference between the display device 20 of this embodiment and the display device 10 of Figure 1 is: the composition of the light source structure is different. Specifically, the light source structures LSS-A1 and LSS-A2 of the display device 20 each include a circuit carrier board 122 and a plurality of light-emitting elements 123A. These light-emitting elements 123A are dispersedly disposed on the carrier surface of the circuit carrier board 122 facing away from the back frame member 100, and are provided to overlap the light-emitting surface of the display panel (i.e., the light-emitting surface of the light source structure). More specifically, different from Figure 2A where the backlight module is a side-in type backlight module, the backlight module of this embodiment is a direct-lit type backlight module.

[0063] It should be noted that, in this embodiment, the blocking portion 173B of the retaining wall structure 170B may be provided with a reflective layer. Therefore, the light rays (such as Figure 5 the light ray LB1 and the light ray LB2) generated by the two light source structures will not leak to the non-corresponding display panel, causing light leakage in the dark state of the display panel. For example, the material of the blocking portion 173B of the retaining wall structure 170B can be selected from plastics or adhesives with high reflectivity to simultaneously serve as the above-mentioned reflective layer between the two light source structures, but this is not limited thereto. In other embodiments not shown, additional reflective layers can also be provided on the two side surfaces of the blocking portion 173B facing the two light guide plates respectively. In this embodiment, the retaining wall structure 170B (especially the blocking portion 173B) extends from one side to the other side of the display areas DA1 and DA2 in the direction Y.

[0064] In this embodiment, the backlight module may further include another optical film 155, which is disposed between the two light source structures and the two display panels and overlaps the light-emitting surfaces (such as the light-emitting surface 123es of the light-emitting element 123A) of the two light source structures respectively. In order to improve the light-emitting uniformity of the direct-lit backlight module, the optical film 155 can be a diffusion film.

[0065] It should be noted that, similar to the optical film 150, the optical film 155 can also continuously extend on the two light-emitting surfaces (i.e., the light-emitting surface 123es of the light-emitting element 123A) of the light source structure LSS-A1 and the light source structure LSS-A2. Therefore, the squeezing effect caused by thermal expansion when using two optical films can be avoided, and there is no need to reserve a buffer space. In other words, the two light source structures share the same optical film 155, which helps to reduce the size of the splicing area TA between the display areas DA1 and DA2.

[0066] In summary, in the display device according to an embodiment of the present invention, a reflective layer is provided between two light source structures that are disposed in the same back frame member and respectively correspond to two display panels. Therefore, the light rays generated by the light source structures will not leak to the non-corresponding display panel, causing light leakage in the dark state of the display panel. In addition, instead of two optically separated films provided on the two light-emitting surfaces of the two light source structures, an optical film that continuously extends on the two light-emitting surfaces of the two light source structures is provided. Accordingly, the buffer space required to consider the thermal expansion effect between the two optical films can be eliminated, which helps to reduce the size of the splicing area between the two display panels.

Claims

1. A display device, comprising: A back frame member having an accommodation space; Two light source structures disposed in the accommodation space of the back frame member, each having a light-emitting surface, and each light source structure includes a light guide plate, and the two light guide plates each have two notches on one side opposite to each other; Two display panels respectively disposed overlapping the two light-emitting surfaces of the two light source structures, the two display panels respectively have a first display area and a second display area, and a splicing area is provided between the first display area of one display panel and the second display area of the other display panel; An optical film disposed between the two light source structures and the two display panels and overlapping the two light-emitting surfaces of the two light source structures; A reflective layer disposed between the two light source structures; and A retaining wall structure extending into the notch and not overlapping the splicing area, wherein the retaining wall structure includes a blocking portion and a connecting portion, and the blocking portion and the connecting portion form an inverted T-shaped structure.

2. The display device according to claim 1, wherein each of the two light source structures includes: The light guide plate is provided with the light-emitting surface and an incident surface connecting the light-emitting surface; And A light source disposed on one side of the incident surface of the light guide plate.

3. The display device according to claim 2, further comprising: Two reflective sheets respectively disposed corresponding to the two light guide plates, and the two light guide plates are each further provided with a first side surface and a second side surface that connect the light-emitting surface and the incident surface and are opposite to each other, and a bottom surface that connects the incident surface and is opposite to the light-emitting surface. The two reflective sheets respectively cover the first side surface, the second side surface and the bottom surface of the light guide plate, and the reflective layer is a combination of the part of the reflective sheet covering the first side surface of the light guide plate and the part of the other reflective sheet covering the second side surface of the other light guide plate.

4. The display device according to claim 3, wherein the retaining wall structure is disposed between the two reflective sheets, and the connecting portion connects the back frame member; and the blocking portion is inserted between the two light guide plates and connected to the connecting portion.

5. The display device according to claim 1, wherein each of the two light source structures includes: A circuit carrier board; And A plurality of light-emitting elements dispersedly disposed on the carrier surface of the circuit carrier board facing away from the back frame member and provided with an overlap with the light-emitting surface of the display panel.

6. The display device according to claim 1, wherein the material of the blocking portion includes rubber.

7. The display device according to claim 1, wherein the blocking portion is provided with the reflective layer.

8. The display device according to claim 1, wherein the optical film includes an optical brightness enhancement film or a diffusion sheet.

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