TWM665486U - Display device - Google Patents

Abstract

A display device includes a display module and a communication module disposed on the back side of the display module. The communication module includes a frame, a sensing antenna, and a fixing unit. The frame and the back side of the display module define a receiving space together. The sensing antenna is located in the receiving space. The fixing unit is disposed in the receiving space and fixes the sensing antenna relative to the receiving space.

Description

Display device

The invention relates to a display device, in particular to a display device with an induction antenna.

Japanese Patent Publication No. 2007-257483 discloses a known display device which, in addition to having a display function, also has a contactless IC card reading and writing function, and includes a frame, a liquid crystal display unit accommodated in the frame, and a reading and writing unit composed of components such as an antenna, and the reading and writing unit is arranged on the back side of the liquid crystal display unit opposite to its display area.

However, the known display device does not have a structure for fixing the read/write unit. Therefore, if the known display device is used in an environment that shakes or vibrates (e.g., a vehicle or a mobile card reader), the read/write unit may be displaced or damaged, thereby affecting the communication quality of the antenna. In addition, since the back side of the liquid crystal display unit does not have a structure for supporting the display unit, the display unit may be sunken or displaced over time, thereby affecting the display quality. This will reduce the reliability and durability of the known display device.

Therefore, the object of the present invention is to provide a display device that can overcome at least one disadvantage of the prior art.

The present invention provides a display device, comprising a display module and a communication module arranged on the back side of the display module. The communication module comprises: a frame body, which defines a receiving space together with the back side of the display module; a sensing antenna, which is located in the receiving space; and a fixing unit, which is arranged in the receiving space and fixes the sensing antenna relative to the receiving space.

By setting the fixing unit, the displacement of the sensing antenna in the frame can be avoided, thereby causing the deviation of the sensing position, and the friction between the sensing antenna and the back of the display module or the frame can be avoided to generate debris or particles. In this way, the display device can be ensured to have good sensing or communication quality and durability.

The present invention also provides a display device, comprising a display module and a communication module disposed on the back side of the display module. The communication module comprises: a frame body, which defines a receiving space together with the back side of the display module; a sensing antenna, which is located in the receiving space; and an insulating device, which is disposed in the receiving space and abuts against the sensing antenna, wherein the surface of the portion of the communication module opposite to the display module is a flat surface.

The configuration of the flat surface can prevent the display module from being sunken and causing uneven display brightness, thereby affecting the display quality of the display device.

Before the present invention is described in detail, it should be noted that the drawings mentioned in the following description are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention and are not drawn according to the number, shape and size of components in actual implementation; in actual implementation, the type, quantity and proportion of each component may be changed, and the layout may also be more complicated.

The novel display device is suitable for sensing signals emitted by mobile devices (e.g., smart phones, electronic watches and other wearable devices, tablet computers, IC cards, etc.) and can display them.

Referring to FIG. 1 , the first embodiment of the display device of the present invention comprises a display module 1 and a communication module 2 , wherein the display module 1 has opposite front and back sides, the front side is used for display, and the communication module 2 is disposed on the back side of the display module 1 .

In this embodiment, the display module 1 is a liquid crystal display (LCD), and includes a liquid crystal panel 11, a backlight unit 12 disposed on the back side of the liquid crystal panel 11, and a control unit 13, but the present invention is not limited thereto. In other embodiments, the display module 1 can also be an organic light emitting diode (OLED) display or a light emitting diode (LED) display.

The liquid crystal panel 11 can be a twisted nematic (TN) liquid crystal panel, a multi-domain vertical alignment (MVA) liquid crystal panel, an in-plane switching (IPS) liquid crystal panel, or a fringe field switching (FFS) liquid crystal panel.

The backlight unit 12 includes a light source, a light guide mechanism, and a reflective sheet. The light source is disposed on one side of the light guide mechanism. The light guide mechanism may include an optical film and a light guide plate to guide the light emitted by the light source toward the liquid crystal panel 11 and to make the light emitted by the light source uniform to form a surface light source. The reflective sheet is disposed on the back side of the light guide plate opposite to the liquid crystal panel 11 to reflect the light emitted from the back side of the light guide plate toward the liquid crystal panel 11 to improve the luminous efficiency of the backlight unit 12. It should be noted that when the display module 1 is an organic light emitting diode display or a light emitting diode display with self-luminescence, the display module 1 is not configured with the backlight unit 12.

The control unit 13 is electrically connected to the wiring in the liquid crystal panel 11, can drive and control the display of the liquid crystal panel 11, and includes a flexible substrate 131 electrically connected to the scan line and data line of the liquid crystal panel 11, and a control circuit board 132 electrically connected to the wiring in the flexible substrate 131. In this embodiment, the flexible substrate 131 is a flexible printed circuit board (FPC), and the control circuit board 132 is a printed circuit board (PCB), but the present invention is not limited thereto.

It should be noted that the liquid crystal panel 11, the backlight unit 12, and the control unit 13 are prior arts and are not within the scope of the present invention. The detailed structures and operating principles of these components will not be further described herein.

The communication module 2 is used to sense and read the signal emitted by the mobile device. In another embodiment, the communication module 2 can also have the function of writing information into the mobile device. In this embodiment, the communication module 2 includes a frame 21, a sensing antenna 22, a reading unit 23, and a fixing unit 24.

The frame 21 is configured to surround the periphery of the backlight unit 12 of the display module 1, and defines a receiving space 20 together with the back side of the display module 1. In this embodiment, the frame 21 is made of metal material (e.g., aluminum, etc.), but the present invention is not limited thereto. In other embodiments, the frame 21 can also be made of other materials (e.g., plastic, etc.).

In this embodiment, the frame 21 includes an outer frame portion 211 surrounding the periphery of the backlight unit 12, and a protrusion portion 212 protruding relative to the outer frame portion 211 in a direction away from the display module 1. The outer frame portion 211 is located outside the protrusion portion 212 and surrounds the protrusion portion 212. The accommodating space 20 is defined by the protrusion portion 212 and the back of the display module 1, but the present invention is not limited thereto.

In the variation shown in FIG2 , the frame 21 may not include the protrusion 212 . That is, in the present invention, the receiving space 20 is defined between the frame 21 and the back surface of the display module 1 .

The sensing antenna 22 is located in the receiving space 20 and can receive the signal emitted by the mobile device. The sensing antenna 22 can communicate with the mobile device via, for example, near-field communication (NFC), WiFi or Bluetooth. The mobile device can be, for example, a smart phone with near-field communication function, a tablet computer with near-field communication function or an IC card using wireless radio frequency identification (RFID) technology.

It should be noted that the projection shape or projection area size of the protrusion 212 in the top-view direction (the vertical direction facing the front of the display module 1, i.e., the direction from top to bottom in FIG. 1 ) can be appropriately changed as needed. For example, the projection area of the protrusion 212 can be equal to, greater than, or even much greater than the projection area of the sensing antenna 22. When the projection area ratio relative to the frame 21 is increased, a larger accommodation space 20 can be provided, thereby providing the freedom of setting the sensing antenna 22, and sufficient space can also be provided to accommodate multiple sensing antennas 22. In this embodiment, the length and width of the sensing antenna 22 are 60 mm and 40 mm respectively, and the projection area of the protrusion 212 is much larger than the projection area of the sensing antenna 22, but the present invention is not limited thereto.

The reading unit 23 and the sensing antenna 22 are respectively arranged on opposite sides of the frame 21 (i.e., the reading unit 23 is arranged on the back side of the frame 21, outside the accommodating space), and is electrically connected to the sensing antenna 22. The reading unit 23 includes a reader circuit substrate that can read the signal received by the sensing antenna 22. In this embodiment, as shown in FIG1 , the reading unit 23 and the sensing antenna 22 are formed on the same flexible printed circuit board and are electrically connected to each other, and a portion of the flexible circuit board passes through the frame 21. In a variation shown in FIG3 , the reading unit 23 is formed on a printed circuit board and is electrically connected to the sensing antenna 22 (for example, through wire bonding or a connector). In another variation as shown in FIG. 4 , the sensing antenna 22 is formed on a flexible printed circuit board, the reading unit 23 is formed on a printed circuit board, and the printed circuit board and the flexible printed circuit board are electrically connected via a connection line 25 that penetrates the frame 21. The connection line 25 is a signal transmission line, such as a coaxial cable. In another embodiment, the reading unit 23 may have the function of writing information into the mobile device.

The fixing unit 24 is disposed in the accommodating space 20 and fixes the sensing antenna 22 relative to the accommodating space 20. In this embodiment, as shown in FIG. 1 and FIG. 10 (the display module 1 is not shown in FIG. 10), the fixing unit 24 includes an insulating device 241 that abuts against the sensing antenna 22, and a sheet material 242 that is fixed to the frame 21 and for the sensing antenna 22 to attach. Specifically, the insulating device 241 is fixed to the frame 21 or the back of the display module 1 and fixes the sensing antenna 22 in a surrounding and abutting manner. The insulating device 241 is made of non-metallic materials such as optical sheets, silicone sheets, and foam. The sheet material 242 is a ferrite sheet located between the sensing antenna 22 and the frame 21, but the present invention is not limited thereto; in other embodiments, the sheet material 242 may also be, for example, double-sided tape, or a combination of a ferrite sheet and double-sided tape. In addition, in the present embodiment, in the top view direction, the projection area of the ferrite sheet on the reference plane is equal to the projection area of the sensing antenna 22 on the reference plane; and the insulating device 241 includes an insulating member, the insulating member having a hollow portion for appropriately accommodating the sensing antenna 22 therein, and substantially filling the accommodating space 20 not occupied by the sensing antenna 22 and the sheet material 2 42, so that the surface of the portion of the communication module 2 opposite to the display module 1 becomes a flat surface, that is, the surface of the sensing antenna 22 attached to the back of the display module 1 and the surface of the insulating member attached to the back of the display module 1 form a coplanar surface, so that the display module 1 can be prevented from being sunken and causing uneven display brightness, thereby affecting the display quality of the display device of the present invention.

It should be noted that in this embodiment, the display module 1 and the communication module 2 can be connected to a device (e.g., a computer, etc.) having a signal receiving or processing function. Specifically, the above device can receive and process the signal read by the reading unit 23 of the communication module 2, and then transmit the processed signal to the display module 1, and display relevant information through the display module 1, but the present invention is not limited thereto.

Several variations of the fixing unit 24 will be described below.

In the first variation shown in FIG. 5 , the fixing unit 24 includes an insulating device 241 against the sensing antenna 22 , and no sheet material 242 is provided.

In the second variation shown in FIG6 , the fixing unit 24 includes a sheet material 242 fixed to the frame 21 and for the induction antenna 22 to attach, and no insulating device 241 is provided. The sheet material 242 is a ferrite sheet located between the induction antenna 22 and the frame 21, and the projection area of the ferrite sheet is equal to the projection area of the induction antenna 22.

In the third variation shown in FIG. 7A and FIG. 7B , the projection area of the ferrite sheet is larger than the projection area of the sensing antenna 22, so that the signal interference of the metal frame 21 or other external components to the sensing antenna 22 can be more effectively suppressed. Therefore, by ensuring that the projection area of the ferrite sheet is equal to or larger than the projection area of the sensing antenna 22, the communication quality of the communication module 2 can be effectively improved to improve the reliability of the display device of the present invention. Here, FIG. 7A shows a state in which the fixing unit 24 only includes the sheet material 242 (i.e., the ferrite sheet); FIG. 7B shows a state in which the fixing unit 24 includes the insulating device 241 and the sheet material 242.

In the fourth variation shown in FIG8A and FIG8B , the insulating device 241 of the fixing unit 24 includes four insulating members, and the four insulating members are arranged around the sensing antenna 22, respectively against the four sides or four corners of the sensing antenna 22, and the sensing antenna 22 is fixed in a manner of surrounding and pressing against the sensing antenna 22. Here, FIG8A shows a state where the four insulating members of the insulating device 241 respectively press against the four sides of the sensing antenna 22; and FIG8B shows a state where the four insulating members of the insulating device 241 respectively press against the four corners of the sensing antenna 22.

In the fifth variation shown in FIG9A , the insulating member of the insulating device 241 has a hollow portion slightly larger than the sensing antenna 22 and accommodating the sensing antenna 22, and a plurality of protrusions extending toward the sensing antenna 22 and abutting against the sensing antenna 22. In other words, the protrusions fix the sensing antenna 22 by surrounding and abutting against the sensing antenna 22. Referring to FIG9A , the hollow portion is located in the middle portion of the insulating member, and the number of the protrusions is four, abutting against the four sides of the sensing antenna 22 respectively. Referring to FIG. 9B , the hollow portion is located at the side edge of the insulating member, and the number of the protruding teeth is three. The three protruding teeth and one side of the frame 21 adjacent to the hollow portion respectively abut against the four sides of the sensing antenna 22 to jointly fix the sensing antenna 22. Referring to FIG. 9C , the hollow portion is located at the corner portion of the insulating member, and the number of the protruding teeth is two. The two protruding teeth and two sides of the frame 21 adjacent to the hollow portion respectively abut against the four sides of the sensing antenna 22 to jointly fix the sensing antenna 22. In other variations, the protruding teeth may also be configured to abut against the corners or other parts of the sensing antenna 22. It should be noted that when the insulating member is a sheet material and its hollow portion is located at an eccentric position, flipping the same insulating member can make it suitable for several different designs of placing the sensing antenna 22 at different positions in the accommodating space 20.

In the present invention, the insulating device 241 is not limited to filling the accommodating space 20. In the variation shown in FIG. 11A to FIG. 11C, the insulating device 241 can also fix the sensing antenna 22 in a manner not to fill the accommodating space 20, wherein, in the embodiment of FIG. 11C, the surface of the portion of the communication module 2 opposite to the display module 1 (i.e., the surface formed by the surface of the sensing antenna 22 attached to the back of the display module 1 and the surface of the insulating member attached to the back of the display module 1) is a flat surface.

It should be noted that in the embodiments shown in FIGS. 6 , 7A, 8A, 8B, 11A, and 11B, if the sensing antenna 22 is designed to be extremely thin, it can also prevent the display module 1 from being sunken and causing uneven display brightness.

In another variation of the present embodiment as shown in FIG. 12 , the insulating device 241 substantially covers the sensing antenna 22 from all sides, so the flat surface of the communication module 2 opposite to the display module 1 is formed by the surface of the insulating device 241 attached to the back of the display module 1. It should be noted that, in order to achieve the purpose of making the surface of the communication module 2 opposite to the display module 1 a flat surface, it is not limited to the above-mentioned implementation. In another implementation, for example, a sheet of material (for example, a reflective sheet) may be attached to the surface of the communication module 2 facing the back of the display module 1 to form the flat surface.

It is worth noting that when the liquid crystal panel 11 of the display module 1 is an IPS liquid crystal panel or a FFS liquid crystal panel, the pixel electrodes and common electrodes made of transparent conductive materials such as indium tin oxide (ITO) are both located on the thin film transistor array substrate and there are slits between the electrodes. Therefore, the transmission signal between the sensing antenna 22 and the mobile device can be partially transmitted to the sensing antenna 22 or the mobile device through the display module 1 via the slits.

It can be seen that when the liquid crystal panel 11 is a lateral electric field switching liquid crystal panel or a boundary electric field switching liquid crystal panel, the display device of the present invention can have a better viewing angle and better color reproduction, and can also have better communication quality. In addition, when the common electrode impedance of the liquid crystal panel 11 is in the range of 50Ω~200Ω, the shielding of the common electrode on the transmission signal can be reduced, thereby further improving the signal transmission efficiency of the display device of the present invention.

Through the above description, the advantages of the display device of the present invention can be summarized as follows:

1. By fixing the sensing antenna 22 with the fixing unit 24, the sensing antenna 22 can be prevented from being displaced in the frame 21, thereby causing the sensing position to shift, and the friction between the sensing antenna 22 and the back of the display module 1 or the frame 21 can be prevented from generating debris or particles. In this way, the display device of the present invention can be ensured to have good sensing or communication quality and durability. Therefore, the communication function of the display device of the present invention will not be affected even in a shaking or vibrating environment.

Second, by ensuring that the surface of the sensing antenna 22 and the insulating member in the communication module 2 facing the display module 1 is a flat surface, the display module 1 can be prevented from being sunken and causing uneven display brightness, thereby affecting the display quality of the display device of the present invention. Therefore, the display function of the display device of the present invention will not be affected even in a shaking or vibrating environment.

Third, by configuring the ferrite sheet 242 so that its projection area on the reference plane in the top view direction is equal to or larger than the projection area of the sensing antenna 22, the signal interference of the metal frame 21 or other external components to the sensing antenna 22 can be effectively suppressed.

Fourth, by maximizing the accommodation space 20, the freedom of placement of the sensing antenna 22 can be ensured.

However, the above is only an example of the implementation of the present invention, and it cannot be used to limit the scope of the implementation of the present invention. All simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the content of the patent specification are still within the scope of the present patent.

1: Display module 11: LCD panel 12: Backlight unit 13: Control unit 131: Flexible substrate 132: Control circuit board 2: Communication module 20: Storage space 21: Frame 211: Outer frame 212: Raised part 22: Sensing antenna 23: Reading part 24: Fixing unit 241: Insulation device 242: Sheet material (ferrite sheet) 25: Connecting wire

Other features and functions of the present invention will be clearly presented in the implementation method with reference to the drawings, in which: Figure 1 is a cross-sectional schematic diagram illustrating an embodiment of the present invention; Figure 2 is a cross-sectional schematic diagram illustrating a variation of the embodiment; Figure 3 is a cross-sectional schematic diagram illustrating another variation of the embodiment; Figure 4 is a cross-sectional schematic diagram illustrating another variation of the embodiment; Figure 5 is a cross-sectional schematic diagram illustrating a first variation of the fixing unit of the embodiment; Figure 6 is a cross-sectional schematic diagram illustrating a second variation of the fixing unit of the embodiment; Figures 7A and 7B are cross-sectional schematic diagrams illustrating two aspects of the third variation of the fixing unit of the embodiment; Figures 8A and 8B are top-view schematic diagrams illustrating two aspects of the fourth variation of the fixing unit of the embodiment; Figures 9A to 9C are top view schematic diagrams illustrating three states of the fifth variation of the fixed unit of the embodiment; Figure 10 is a top view schematic diagram illustrating the communication module of the embodiment; Figures 11A to 11C are cross-sectional schematic diagrams illustrating several variations of the embodiment; Figure 12 is a cross-sectional schematic diagram illustrating yet another variation of the embodiment.

1: Display module

11: LCD panel

12: Backlight unit

13: Control unit

131: Flexible substrate

132: Control circuit board

2: Communication module

20: Accommodation space

21:Frame

211: Outer frame

212: Raised part

22: Sensing antenna

23: Reading Department

24: Fixed unit

241: Insulation device

242: Sheet material

Claims (10)

A display device includes a display module and a communication module disposed on the back side of the display module. The communication module includes: a frame body, which defines a storage space together with the back side of the display module; a sensing antenna, which is located in the storage space; and a fixing unit, which is disposed in the storage space and fixes the sensing antenna relative to the storage space. A display device as described in claim 1, wherein the fixing unit includes an insulating member fixed to the frame and against the sensing antenna. A display device as described in claim 1 or 2, wherein the fixing unit includes a sheet material fixed to the frame and for the sensing antenna to be attached. A display device as described in claim 3, wherein the sheet material is a ferrite sheet. A display device as described in claim 1 or 2, wherein the fixed unit substantially fills the portion of the accommodating space not occupied by the sensing antenna. A display device as described in claim 1 or 2, wherein the frame includes a protrusion, and the protrusion and the back surface of the display module together define the accommodating space. A display device as described in claim 1 or 2, wherein the display module includes a liquid crystal panel and a backlight unit arranged on the back side of the liquid crystal panel. A display device includes a display module and a communication module disposed on the back side of the display module. The communication module includes: a frame body, which defines a storage space together with the back side of the display module; a sensing antenna, which is located in the storage space; and an insulating member, which is disposed in the storage space and abuts against the sensing antenna. The surface of the portion of the communication module opposite to the display module is a flat surface. The display device as described in claim 8, wherein the flat surface is formed by the surface of the sensing antenna attached to the back side of the display module and the surface of the insulating member attached to the back side of the display module. A display device as described in claim 8 or 9, wherein the display module includes a liquid crystal panel and a backlight unit arranged on the back side of the liquid crystal panel.