TWI829185B - Display apparatus - Google Patents

Abstract

A display apparatus including a back frame, two light source structures, two display panels, an optical film and a reflective layer is provided. The back frame has an accommodating space, and the accommodating space is provided with the two light source structures. The two light source structures each have a light emitting surface. The two display panels respectively overlap 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.

Description

display device

The present invention relates to a display device, and in particular to a spliced display device.

A current display device is made of multiple display panels spliced together. In response to different usage scenarios (such as automotive applications), different display panels of this display device can be turned on and off independently. In some application scenarios, only part of the display panel will be turned on, and the corresponding backlight source will be turned on for illumination. However, part of the light generated by the turned-on backlight easily leaks to the display panel that is not turned on, causing serious light leakage.

The present invention provides a display device provided with a plurality of display panels. When some of the display panels are turned on, the display panels that are not turned on can still maintain good dark state performance.

The display device of the present invention includes a back frame, two light source structures, two display panels, an optical film and a reflective layer. The back frame has an accommodating space, and two light source structures are provided in the accommodating space. The two light source structures each have a light exit surface. The two display panels are arranged to overlap two light-emitting surfaces of the two light source structures respectively. 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 arranged between the two light source structures.

Based on the above, in the display device according to an embodiment of the present invention, a reflective layer is provided between the two light source structures provided in the same back frame and respectively corresponding to the two display panels. Therefore, the light generated by the light source structure will not leak to a non-corresponding display panel, causing light leakage when the display panel is in a dark state. In addition, the two light-emitting surfaces of the two light source structures are not provided with two structurally separated optical films, but are provided with optical films that extend continuously on the two light-emitting surfaces of the two light source structures. Accordingly, the buffer space required to be reserved between the two optical films due to the thermal expansion effect can be eliminated, which helps to reduce the size of the splicing area between the two display panels.

As used herein, "about," "approximately," "substantially," or "substantially" includes the stated value and an average within an acceptable range of deviations from a particular value as determined by one of ordinary skill in the art, taking into account that Discuss the measurement and the specific amount of error associated with the measurement (i.e., the limitations of the measurement system). For example, "about" can mean within one or more standard deviations of the stated value, or within ±30%, ±20%, ±15%, ±10%, ±5%, for example. Furthermore, the terms "approximately", "approximately", "substantially" or "substantially" used in this article can be used to select a more acceptable deviation range or standard deviation based on the measurement properties, cutting properties or other properties, and can Not one standard deviation applies to all properties.

In the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity. It will 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 Intermediate elements may also be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present. As used herein, "connected" may refer to physical and/or electrical connection. Furthermore, "electrical connection" can be the presence of other components between the two components.

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 numbers are used in the drawings and descriptions to refer to the same or similar parts.

Figure 1 is a schematic cross-sectional view of a display device according to the present invention. 2A and 2B are schematic front views of the display device of FIG. 1 . FIG. 3 is an enlarged schematic view of the optical film of FIG. 1 . For clear presentation, FIG. 2A omits the illustration of the connection portion 171 of the retaining wall structure 170 , the display panel DP1 , the display panel DP2 , the light-transmitting cover 200 and the light-shielding pattern layer 210 of FIG. 1 , while FIG. 2B only illustrates The light-shielding pattern layer 210, the light guide plate 111, the light guide plate 112 and the blocking portion 173 of the blocking wall structure 170 of 1.

Referring to FIGS. 1 to 2B , the display device 10 includes a back frame 100 , two backlight modules and two display panels. Both backlight modules are disposed in the accommodation space CA of the back frame 100 . The two display panels correspond to the two backlight module settings respectively. 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 a light incident surface 110is connected to the light emitting surface 110es. The light source 120 is disposed on one side of the light incident surface 110is of the light guide plate 110 .

In this embodiment, the light source 120 is, for example, a light board, which may include a circuit board 121 and a plurality of light-emitting elements 123 arranged on a 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 light incident surface 110is of the light guide plate 110 . The two light source structures LSS are arranged along the direction X.

In detail, the light guide plate 110 is also provided with a first side surface 110ss1 and a second side surface 110ss2 that connect the light exit surface 110es and the light entrance surface 110is and are opposite to each other on opposite sides of the light guide plate 110 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 110ss1 of the light guide plate 111 and the second side of the light guide plate 112 The side 110ss2 are set facing each other.

The two light-emitting surfaces 110es of the light guide plate 111 and the light guide plate 112 are respectively provided with a display panel DP1 and a display panel DP2. That is, the two display panels are arranged to overlap the two light-emitting surfaces 110es of the two light guide plates 110 respectively. In this embodiment, the display panel DP1 and the display panel DP2 have a display area DA1 and a display area DA2 respectively, and a splicing area TA is provided between the two display panels. It should be noted that the overlapping relationship between the two components here is, for example, overlapping along the normal direction (eg, direction Z) of the light emitting surface 110es. Unless otherwise mentioned below, the overlapping relationships described below are all defined in the same way and will not be described again.

In this embodiment, a light-transmitting cover plate 200 can be attached to the two display panels, and the light-transmitting cover plate 200 is provided with a light-shielding pattern layer 210 . 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.

Furthermore, in order to prevent the light generated by each of the two light source structures LSS from leaking to the non-corresponding display panel, causing the light leakage phenomenon of the display panel in the dark state, for example, blocking the light generated by the light source structure LSS overlapping the display panel DP1. The light LB1 is transmitted to the display panel DP2, or the light LB2 generated by blocking the light source structure LSS overlapping the display panel DP2 is transmitted to the display panel DP1. A reflective layer can also be provided between the two light source structures LSS.

For example, the backlight module may further include two reflective sheets 130, which are respectively provided corresponding to the two light guide plates 110. In detail, the light guide plate 110 is also provided with a bottom surface 110bs connected to the light entrance surface 110is and opposite to the light exit surface 110es, and a high beam surface 110fs connected to the bottom surface 110bs, the first side surface 110ss1, the second side surface 110ss2 and the light exit surface 110es. In this embodiment, the reflective sheet 130 is disposed between the light guide plate 110 and the back frame 100 and covers the bottom surface 110bs, the first side surface 110ss1, the second side surface 110ss2 and the high beam surface 110fs of the light guide plate 110. However, this is not the case. is limited.

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

In this embodiment, the display device 10 may further include a blocking wall structure 170 disposed between the reflective sheet 131 and the reflective sheet 132 . In detail, the retaining wall structure 170 includes a connecting portion 171 connected to the back frame member 100 and a blocking portion 173 . The blocking part 173 is interposed between the light guide plate 111 and the light guide plate 112 and is connected to the connecting part 171 . For example, the blocking portion 173 of the blocking wall structure 170 can 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 emitting abnormal sounds due to the small distance between them. 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 that are subjected to external impact or vibration.

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

In this embodiment, the backlight module further includes an optical film 150, which is disposed between the two display panels and the two light source structures LSS, and overlaps the two light exit surfaces 110es of the two light source structures LSS (or the light guide plate 110). Because the two light source structures LSS are not provided with two optical films that are structurally separated from each other, but are provided with an optical film 150 that extends continuously on the two light exit surfaces 110es of the two light source structures LSS. Therefore, the need to reserve a buffer space due to the squeezing 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.

Please refer to FIG. 3 at the same time. In order to increase the light collection of the backlight module, the optical film 150 of this embodiment may be an optical brightness enhancement film (BEF), such as a combination of a phosphor film 151 and a phosphor film 152 . For example, the extension direction of the plurality of fiber structures 151P on the fiber sheet 151 may be perpendicular to the extension direction of the plurality of fiber structures 152P on the fiber sheet 152, and the extension direction here is, for example, parallel or perpendicular to the guide. The direction of the light incident surface 110is of the light plate 110 is, but not limited to, this.

Other embodiments will be enumerated below to describe the present disclosure in detail, in which the same components will be marked with the same symbols, and the description of the same technical content will be omitted. Please refer to the previous embodiments for the omitted parts, which will not be described again below.

4A and 4B are schematic front views of another display device according to the present invention. Please refer to FIGS. 4A and 4B . The main difference between the display device 10A of this embodiment and the display device 10 of FIGS. 2A and 2B is that the arrangement of the retaining wall structure is different. Specifically, in this embodiment, the blocking portion 173A of the blocking wall structure 170A does not overlap the splicing area TA". For example, the blocking wall structure 170A can be disposed opposite the light guide plate 111A and the light guide plate 112A along the direction Y. Both sides, and the two light guide plates each have two notches 110n on opposite sides. The blocking portion 173A of the blocking wall structure 170A can extend into the notches 110n, but does not overlap the splicing area TA" of the two display intervals.

By providing the above-mentioned gap 110n to accommodate the blocking wall structure 170A, the distance between the light guide plate 111A and the light guide plate 112A of the two light source structures LSS" can be further reduced. That is, in this embodiment, the splicing area TA" is along the display area The width of DA1 and display area DA2 in the arrangement direction (for example, direction The sense of discontinuity in the splicing area TA".

Figure 5 is a schematic cross-sectional view of another display device according to the present invention. 6A and 6B are schematic front views of the display device of FIG. 5 . Referring to FIGS. 5 to 6B , the main difference between the display device 20 of this embodiment and the display device 10 of FIG. 1 is that the composition of the light source structure is different. Specifically, the light source structure LSS-A1 and the light source structure 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 arranged on the surface of the circuit carrier board 122 facing away from the back frame 100 , and are provided with a light-emitting surface (that is, the light-emitting surface of the light source structure) that overlaps the display panel. More specifically, unlike the backlight module of FIG. 2A which is an edge-type backlight module, the backlight module of this embodiment is a direct-type backlight module.

It is particularly noted that in this embodiment, the blocking portion 173B of the blocking wall structure 170B may be provided with a reflective layer. Therefore, the light generated by each of the two light source structures (light LB1 and light LB2 in FIG. 5 ) will not leak to a non-corresponding display panel and cause light leakage when the display panel is in a dark state. For example, the material of the blocking portion 173B of the blocking wall structure 170B can be made of plastic or glue with high reflectivity to simultaneously serve as the above-mentioned reflective layer between the two light source structures, but it is not limited to this. In other embodiments not shown, additional reflective layers may also be provided on the two side surfaces of the blocking portion 173B facing the two light guide plates respectively. In this embodiment, the blocking wall structure 170B (especially the blocking portion 173B) extends from one side of the display area DA1 and the display area DA2 to the other side in the direction Y.

In this embodiment, the backlight module may also include another optical film 155, which is disposed between the two light source structures and the two display panels, and overlaps the respective light exit surfaces of the two light source structures (for example, the light exit surface 123es of the light emitting element 123A). ). In order to increase the uniformity of light output of the direct backlight module, the optical film 155 may be a diffuser.

It is particularly important to note that, similar to the optical film 150 , the optical film 155 can also extend continuously on the two light exit surfaces of the light source structure LSS-A1 and the light source structure LSS-A2 (ie, the light exit surface 123es of the light emitting element 123A). Therefore, the need to reserve buffer space due to the squeezing effect caused by thermal expansion when using two optical films can be avoided. 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 area DA1 and the display area DA2.

To sum up, in the display device according to an embodiment of the present invention, a reflective layer is provided between the two light source structures provided in the same back frame and respectively corresponding to the two display panels. Therefore, the light generated by the light source structure will not leak to a non-corresponding display panel, causing light leakage when the display panel is in a dark state. In addition, the two light-emitting surfaces of the two light source structures are not provided with two structurally separated optical films, but are provided with optical films that extend continuously on the two light-emitting surfaces of the two light source structures. Accordingly, the buffer space required to be reserved between the two optical films due to the thermal expansion effect can be eliminated, which helps to reduce the size of the splicing area between the two display panels.

10, 10A, 20: display device 100: Back frame parts 110, 111, 112, 111A, 112A: light guide plate 110bs: Bottom 110es: light-emitting surface 110fs: high beam surface 110n: notch 110ss1: first side 110ss2: Second side 120:Light source 121:Circuit board 122:Circuit carrier board 123, 123A: Light emitting element 130, 131, 132: Reflective sheet 150, 155: Optical film 151, 152: 稜鏡片 151P, 152P: structure 170, 170A, 170B: retaining wall structure 171:Connection part 173, 173A, 173B: blocking part 200: Translucent cover 210:Light-shielding pattern layer CA: Accommodation space DA1, DA2: display area DP1, DP2: display panel LB1, LB2: light LSS, LSS”, LSS-A1, LSS-A2: light source structure OP1, OP2: Open your mouth TA, TA": splicing area X, Y, Z: direction

Figure 1 is a schematic cross-sectional view of a display device according to the present invention. 2A and 2B are schematic front views of the display device of FIG. 1 . FIG. 3 is an enlarged schematic view of the optical film of FIG. 1 . 4A and 4B are schematic front views of another display device according to the present invention. Figure 5 is a schematic cross-sectional view of another display device according to the present invention. 6A and 6B are schematic front views of the display device of FIG. 5 .

10:Display device 100: Back frame parts 110, 111, 112: Light guide plate 110bs: Bottom 110es: light-emitting surface 110ss1: first side 110ss2: Second side 130, 131, 132: Reflective sheet 150: Optical film 170:Retaining wall structure 171:Connection part 173: Blocking Department 200: Translucent cover 210:Light-shielding pattern layer CA: Accommodation space DA1, DA2: display area DP1, DP2: display panel OP1, OP2: Open your mouth TA: splicing area X, Z: direction

Claims (3)

A display device, including: a back frame member, having a receiving space; two light source structures, arranged in the receiving space of the back frame member, and each having a light-emitting surface, the two light source structures each include: a guide A light plate is provided with the light exit surface and a light entrance surface connected to the light exit surface; and a light source is provided on one side of the light entrance surface of the light guide plate; two display panels overlap the two light exit surfaces of the two light source structures respectively. surface is provided; an optical film is provided between the two light source structures and the two display panels, and overlaps the two light exit surfaces of the two light source structures; two reflective sheets are respectively provided corresponding to the two light guide plates, the two guide plates The light panels each also have a first side and a second side connecting the light-emitting surface and the light-incident surface and opposing each other, and a bottom surface connecting the light-incident surface and opposing the light-emitting surface. The two reflective sheets each cover a The first side, the second side and the bottom surface of the light guide plate; and a blocking wall structure, which is disposed between the two reflective sheets and includes: a connecting part connecting the back frame member; and a blocking part, Insert between the two light guide plates and connected to the connection part, wherein the two display panels respectively have a first display area and a second display area, the first display area of one display panel and the other The second display section of the display panel is provided with a splicing area, and the retaining wall structure does not overlap the splicing area. The display device according to claim 1, wherein the material of the blocking part includes rubber. The display device of claim 1, wherein the optical film includes an optical brightness enhancement film or a diffusion sheet.

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