阅读说明：本技术 集成有天线的图像显示装置和用于图像显示装置的天线 (Antenna-integrated image display device and antenna for image display device ) 是由 朴东必 吴伦锡 许润镐 洪源斌 于 2019-03-06 设计创作，主要内容包括：本发明的实施方式的图像显示装置包括印刷电路板、安装在印刷电路板上的天线、设置在印刷电路板上的显示面板以及设置在显示面板上并电连接至天线的传输线。通过在显示面板上设置传输线,可以缩短信号路径并减少噪声。(An image display device of an embodiment of the present invention includes a printed circuit board, an antenna mounted on the printed circuit board, a display panel disposed on the printed circuit board, and a transmission line disposed on the display panel and electrically connected to the antenna. By providing the transmission line on the display panel, a signal path can be shortened and noise can be reduced.)

1. An image display device, comprising:

a printed circuit board;

an antenna mounted on the printed circuit board;

a display panel disposed on the printed circuit board; and

a transmission line disposed on the display panel and electrically connected to the antenna.

2. The image display device of claim 1, further comprising electronics mounted on the printed circuit board.

3. The image display device of claim 2, wherein the electronic device comprises a display driver Integrated Circuit (IC) chip and a memory device.

4. The image display device according to claim 2, wherein the electronic device and the antenna are mounted on a same surface of the printed circuit board.

5. The image display device according to claim 1, further comprising a connection structure electrically connecting the transmission line and the antenna to each other.

6. The image display device of claim 5, wherein the connection structure comprises a Flexible Printed Circuit Board (FPCB).

7. The image display device according to claim 5, wherein the connection structure is connected to an end of the transmission line, and extends toward the printed circuit board through an outer peripheral region of the image display device so as to be connected to the antenna.

8. The image display device according to claim 5, wherein a plurality of the antennas are electrically connected to each other via the connection structure and the transmission line.

9. The image display device of claim 1, wherein the transmission line comprises a mesh structure.

10. The image display device according to claim 9, further comprising a dummy pattern disposed around the transmission line, the dummy pattern comprising a same mesh structure as the transmission line.

11. The image display device of claim 1, further comprising a dielectric layer disposed on the display panel, wherein the transmission line is disposed on a top surface of the dielectric layer.

12. The image display device according to claim 11, wherein the transmission line comprises:

a pair of ground lines; and

and a signal line interposed between the ground lines.

13. The image display device of claim 11, further comprising a ground layer disposed on a bottom surface of the dielectric layer.

14. The image display device according to claim 13, wherein the display panel comprises a thin film transistor array substrate, a display layer, and an electrode, and the electrode of the display panel functions as the ground layer.

15. The image display device of claim 1, further comprising:

an upper encapsulation layer disposed on the transmission line; and

a window substrate disposed on the upper encapsulation layer.

16. An antenna for an image display device, comprising:

a dielectric layer;

a transmission line disposed on the dielectric layer;

a radiation pattern disposed under the dielectric layer and spaced apart from the dielectric layer by a display panel interposed therebetween; and

a connection structure electrically connecting the radiation pattern and the transmission line to each other.

Technical Field

The present invention relates to an image display device integrated with an antenna and an antenna for an image display device.

Background

With the development of information technology, wireless communication technologies such as Wi-Fi, bluetooth, etc. are combined with display devices such as in the form of smart phones. In this case, the antenna may provide a communication function in combination with the display device.

With the rapid development of mobile communication technology, antennas capable of operating ultra-high frequency communication are required in display devices. Further, as the communication functions are all included in one display device, a plurality of antennas capable of sensing different frequencies are combined with the display device.

The plurality of antennas may be connected to each other through an antenna wire such as a transmission line. However, as various driving circuit chips, memory devices, sensor chips, and the like are integrated in the display device, a space or an area in which the antenna wire can be disposed is reduced. Therefore, the antenna wiring may bypass or the length of the antenna wiring may be increased, thereby increasing the signal resistance.

In addition, various circuit structures such as a resistor, a capacitor, and a phase modulator are included in the display device, and an antenna signal may be interfered or disturbed by noise generated from these circuit structures.

For example, korean patent laid-open publication No. 2016 0059291 discloses an antenna integrated into a display panel, but does not provide a solution to the above-mentioned problems.

Disclosure of Invention

According to an aspect of the present invention, there is provided an antenna-integrated image display device having improved signal efficiency and reliability.

According to an aspect of the present invention, there is provided an antenna for an image display device having improved signal efficiency and reliability.

(1) An image display device, comprising: a printed circuit board; an antenna mounted on the printed circuit board; a display panel disposed on the printed circuit board; and a transmission line disposed on the display panel and electrically connected to the antenna.

(2) The image display device according to the above (1), further comprising an electronic device mounted on the printed circuit board.

(3) The image display device according to the above (2), wherein the electronic device includes a display driving Integrated Circuit (IC) chip and a storage device.

(4) The image display device according to the above (2), wherein the electronic device and the antenna are mounted on the same surface of the printed circuit board.

(5) The image display device according to the above (1), further comprising a connection structure electrically connecting the transmission line and the antenna to each other.

(6) The image display device according to the above (5), wherein the connection structure comprises a Flexible Printed Circuit Board (FPCB).

(7) The image display device according to the above (5), wherein the connection structure is connected to an end of the transmission line, and extends toward the printed circuit board through an outer peripheral region of the image display device so as to be connected to the antenna.

(8) The image display device according to the above (5), wherein the plurality of antennas are electrically connected to each other via the connection structure and the transmission line.

(9) The image display device according to the above (1), wherein the transmission line includes a mesh structure.

(10) The image display device according to the above (9), further comprising a dummy pattern disposed around the transmission line, the dummy pattern including the same mesh structure as the transmission line.

(11) The image display device according to the above (1), further comprising a dielectric layer disposed on the display panel, wherein the transmission line is disposed on a top surface of the dielectric layer.

(12) The image display device according to the above (11), wherein the transmission line includes: a pair of ground lines; and a signal line interposed between the ground lines.

(13) The image display device according to the above (11), further comprising a ground layer disposed on a bottom surface of the dielectric layer.

(14) The image display device according to the above (13), wherein the display panel includes a thin film transistor array substrate, a display layer, and an electrode, and the electrode of the display panel functions as a ground layer.

(15) The image display device according to the above (1), further comprising: an upper encapsulation layer disposed on the transmission line; and a window substrate disposed on the upper encapsulation layer.

(16) An antenna for an image display device, comprising: a dielectric layer; a transmission line disposed on the dielectric layer; a radiation pattern disposed under the dielectric layer and spaced apart from the dielectric layer by the display panel interposed therebetween; and a connection structure electrically connecting the radiation pattern and the transmission line to each other

According to an embodiment of the present invention, the transmission line and the antenna may be disposed to be spaced apart from each other at different layers or at different heights by the display panel interposed therebetween. Accordingly, a transmission line can be provided on a Printed Circuit Board (PCB) of an image display device without being limited by a space of a display driving Integrated Circuit (IC) chip, a memory device, and the like. Accordingly, signal loss through the transmission line can be reduced, and interference caused by noise from circuit devices on the printed circuit board can be eliminated or reduced.

In some embodiments, the antenna and the transmission line may be electrically connected to each other through a connection structure passing through a bezel region of the image display device, and a signal path through the transmission line and the connection structure may be shortened.

In some embodiments, the transmission line may include a mesh structure, and may have improved light transmittance and transparency, and thus may enhance image quality achieved by the display panel.

Drawings

Fig. 1 and 2 are schematic cross-sectional views illustrating an image display device according to an exemplary embodiment.

Fig. 3 is a schematic top plan view illustrating a dummy pattern surrounding a transmission line according to some exemplary embodiments.

Fig. 4 and 5 are schematic top plan views illustrating an image display device according to an exemplary embodiment.

Fig. 6 is a schematic top plan view showing an image display device according to a comparative example.

Fig. 7 and 8 are schematic cross-sectional views illustrating the configuration of a transmission line according to an exemplary embodiment.

Detailed Description

According to an exemplary embodiment of the present invention, there is provided an image display device including a transmission line and an antenna spaced apart from each other by a display panel interposed therebetween. For example, there is provided a display device including an antenna for 3G-5G mobile communication embedded therein.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. However, those skilled in the art will appreciate that the embodiments described with reference to the drawings are provided for further understanding of the spirit of the invention and do not limit the claimed subject matter to that disclosed in the detailed description and the appended claims.

Fig. 1 and 2 are schematic cross-sectional views illustrating an image display device according to an exemplary embodiment.

Referring to fig. 1 and 2, the image display device may include a printed circuit board 100 and a display panel 140, and may include antennas 110a and 110b mounted on the Printed Circuit Board (PCB)100 and a transmission line 170 disposed on the display panel 140.

The printed circuit board 100 may have a structure in which metal layers and insulating layers forming an internal circuit may be repeatedly stacked. Connection pads, such as solder, for connecting the internal circuitry and the electronic device may be formed on the printed circuit board 100. For example, the printed circuit board 100 may be used as a main board of an image display device.

The electronic device and the antennas 110a and 110b may be mounted on the printed circuit board 100 through connection pads, for example. As shown in fig. 1, the electronic device and the antennas 110a and 110b may be disposed on a top surface of the printed circuit board 100. As shown in fig. 2, the electronic device and the antennas 110a and 110b may also be disposed on the bottom surface of the printed circuit board 100.

In one embodiment, the electronics and antennas 110a and 110b may be distributed on the top and bottom surfaces of the printed circuit board 100.

Multiple antennas may be mounted on the printed circuit board 100. The multiple antennas may have different resonant frequencies.

For example, the first and second antennas 110a and 110b may be individually mounted on the printed circuit board 100, and three or more antennas may be mounted.

Each of the antennas 110a and 110b may include a radiation pattern, and may further include a pad electrode for connection with the transmission line 170 and/or an internal circuit of the printed circuit board 100. The radiation pattern and the pad electrode may include a metal or an alloy.

The antennas 110a and 110b may be mounted on the printed circuit board 100 in the form of antenna patches or antenna chips.

The electronic devices may include, for example, a display driver Integrated Circuit (IC) chip 120, a memory device 130, and the like. Storage 130 may include, for example, a RAM device or a flash memory device.

The electronic device may further include an IC chip for driving various sensor devices included in the image display device. For example, the electronic device may include a touch sensor or a driving IC chip of a touch screen panel.

The electronic device may include various circuit structures of the image display device, such as a resistor, a capacitor, a phase modulator, and the like.

The display panel 140 may be disposed on the printed circuit board 100. In an exemplary embodiment, the printed circuit board 100 and the display panel 140 may be separated by a predetermined distance.

For example, the printed circuit board 100 and the display panel 140 may be fixed by a case of the image display device, so that an isolation space may be formed between the printed circuit board 100 and the display panel 140.

In one embodiment, an isolation structure such as an adhesive layer, a separator, or the like may be disposed in the isolation space.

A portion of the image display device under the display panel 140 may correspond to a rear portion of the image display device, and the printed circuit board 100 provided with the antennas 110a and 110b and the electronic device described above may be disposed under the display panel 140. The portion above the display panel 140 may correspond to a front portion of the image display apparatus where imaging is performed.

The display panel 140 may include, for example, a Thin Film Transistor (TFT) array substrate. For example, the TFT array substrate may include a base substrate such as a glass substrate or a resin substrate, a thin film transistor disposed on the base substrate, a scan line, a data line, and the like. In fig. 1 and 2, reference numeral "140" may be used interchangeably to collectively refer to a display panel and a TFT array substrate.

The display panel 140 may include a pixel defining layer 145 and a display layer 150 disposed on the TFT array substrate. For example, a pixel electrode included in a thin film transistor may be partially exposed through the pixel defining layer 145 to define each pixel, and the display layer 150 may be formed on an exposed surface of the pixel electrode.

The pixel defining layer 145 may include an inorganic insulating material or an organic insulating material. The display layer 150 may include, for example, an organic light emitting layer or a liquid crystal layer. When the display layer 150 includes an organic light emitting layer, the image display device may be configured as an Organic Light Emitting Diode (OLED) display device. In this case, the display layer 150 may further include a hole transport layer, an electron transport layer, and the like.

When the display layer 150 includes a liquid crystal layer, the image display device may be configured as a Liquid Crystal Display (LCD) device. In this case, a backlight, a polarizing plate, and the like may be further disposed between the display panel 140 and the printed circuit board 100.

A reflective electrode 155 may be disposed on the display layer 150. For example, the reflective electrode 155 may serve as a common electrode extending over a plurality of display layers 150 or pixels.

A dielectric layer 160 may be formed on the reflective electrode 155 and the pixel defining layer 145. The dielectric layer 160 may serve as a lower encapsulation layer protecting the display panel 140.

The transmission line 170 may be disposed on the dielectric layer 160. The transmission line 170 may be electrically connected to the antennas 110a and 110b, and may serve as a feeding and signal transmitting/receiving path between the antenna driving IC chip and the antennas 110a and 110 b.

In an exemplary embodiment, the transmission line 170 may include a mesh structure. For example, the metal or alloy used in the radiation pattern may be patterned in the form of a plurality of intersecting electrode lines to form the transmission line 170. Accordingly, the transmittance with respect to the upper side of the display panel 140 may be improved, and the image quality may also be improved.

In an exemplary embodiment, the transmission line 170 and the antennas 110a and 110b, which are respectively positioned at the upper and lower sides of the display panel 140, may be electrically connected to each other through the connection structures 180a and 180 b.

In some embodiments, the transmission line 170 and the first antenna 110a may be connected to each other through a first connection structure 180a, and the transmission line 170 and the second antenna 110b may be connected to each other through a second connection structure 180 b. Accordingly, the first and second antennas 110a and 110b disposed under the display panel 140 may be electrically connected to or grouped with each other via the transmission line 170.

The connection structures 180a, 180b may include metal wires or flexible circuit boards (FPCBs).

As shown in fig. 1, when the antennas 110a and 110b are mounted on the top surface of the printed circuit board 100, one end portions of the connection structures 180a and 180b may extend across the display panel 140 to be connected to one end portion of the transmission line 170. Opposite ends of the connection structures 180a and 180b may be bent between the display panel 140 and the printed circuit board 100 to be connected to the antennas 110a and 110 b. For example, opposite ends of the connection structures 180a and 180b may be electrically connected to pad electrodes included in the antennas 110a and 110 b.

As shown in fig. 2, when the antennas 110a and 110b are mounted on the bottom surface of the printed circuit board 100, the connection structures 180a and 180b may extend from one end of the transmission line 170 to the bottom surface of the printed circuit board 100 to be connected to the antennas 110a and 110 b.

An upper encapsulation layer 190 may be formed on the transmission line 170. The upper encapsulation layer 190 may include an inorganic insulating material such as silicon oxide or silicon nitride, an organic insulating material such as acrylic resin or imide resin, or an organic-inorganic composite film.

A window substrate 195 may be disposed on the upper encapsulation layer 190. Window substrate 195 can provide a viewing surface to a user of the image display device.

In some embodiments, the image display device may further include a sensor structure such as a touch sensor or a touch screen panel, or an optical structure such as a polarizing plate or a retardation film.

A sensor structure or optical structure may be disposed between the window substrate 195 and the transmission line 170. Alternatively, a sensor structure or an optical structure may be disposed between the transmission line 170 and the display panel 140.

In one embodiment, a sensor structure or optical structure may be interposed between window substrate 195 and transmission line 170, so that a signal path through transmission line 170 may be shortened and signal sensitivity may be enhanced.

As described above, according to an exemplary embodiment, the antennas 110a and 110b and the transmission line 170 may be disposed to be spaced apart from each other at different heights by the display panel 140 interposed therebetween. Accordingly, the transmission line 170 may be provided without being limited by a space of an electronic device such as the display driving Integrated Circuit (IC) chip 120 and the memory device 130. Accordingly, the signal path can be shortened to prevent an increase in resistance and signal loss through the transmission line 170.

Fig. 3 is a schematic top plan view illustrating a dummy pattern surrounding a transmission line according to some exemplary embodiments.

Referring to fig. 3, as described with reference to fig. 1 and 2, the transmission line 170 may be disposed on the dielectric layer 160, and the transmission line 170 may include a mesh structure.

In an exemplary embodiment, a dummy pattern 172 may be included around the transmission line 170 on the dielectric layer 160. The dummy pattern 172 may be spaced apart from the transmission line 170 by a predetermined distance, and may be electrically and physically separated from the transmission line 170.

The dummy pattern 172 may include a mesh structure substantially the same as or similar to the transmission line 170.

For example, the dummy pattern 172 may be formed of the same material as the transmission line 170, and may include a mesh structure having the same line width and open aperture ratio of the electrode line as the transmission line 170. Accordingly, an optical deviation caused by the transmission line 170 may be reduced, so that a user of the image display device may be prevented from seeing the transmission line 170.

Fig. 4 and 5 are schematic top plan views illustrating an image display device according to an exemplary embodiment. For example, fig. 4 is a top plan view illustrating a front portion of the image display device, and fig. 5 is a top plan view illustrating a rear portion of the image display device excluding the rear cover.

Referring to fig. 4 and 5, the image display device may include a display area 50 and a peripheral area 60 on a front portion thereof. The image generated from the display panel 140 shown in fig. 1 or 2 may be displayed to the user through the display area 50. The transmission line 170 may be disposed on the display panel 140 and may include a substantially transparent mesh structure, so that image quality may be prevented from being degraded.

The outer peripheral region 60 may be located at both end portions and both lateral portions of the display region 50. The outer peripheral region 60 may include a bezel region 65 located between the housing 70 of the image display device and the printed circuit board 100.

The antennas 110a, 110b, and 110c may be mounted on the printed circuit board 100, and the electronic devices 120 and 130 may also be mounted on the printed circuit board 100. In addition, the battery 80 may be coupled to the printed circuit board 100.

As described with reference to fig. 1 and 2, the connection structures 180a, 180b, and 180c, such as flexible circuit boards (FPCBs), may each be connected to the transmission line 170 on the display panel 140, and may extend toward the printed circuit board 100 through the bezel area 65 so as to be connected to the antennas 110a, 110b, and 110 c. Therefore, the antennas 110a, 110b, and 110c may be electrically connected to each other through the transmission line 170, and may be controlled and fed together through the antenna driving IC chip, for example.

In addition, the connection structures 180a, 180b, and 180c may be connected to the antennas 110a, 110b, and 110c through the bezel region 65 so that the image realization in the display region 50 is not interrupted by the connection structures 180a, 180b, and 180 c.

Fig. 6 is a schematic top plan view showing an image display device according to a comparative example.

Referring to fig. 6, in the comparative example, the first to third antennas 110a, 110b and 110c are mounted on the printed circuit board 100 together with the electronic devices 120 and 130, and the transmission line 90 is also mounted on the printed circuit board 100 together with the antennas 110a, 110b and 110 c.

The transmission line 90 for connecting the first antenna 110a and the second antenna 110b to each other is provided as a bypass to go through the display driving Integrated Circuit (IC) chip 120, and the transmission line 90 for connecting the second antenna 110b and the third antenna 110c to each other is provided as a bypass to go through the storage device 130.

Therefore, the length of the transmission line 90 increases, and the signal loss level may become large due to the increase in resistance. In addition, the antenna signal may be interfered or disturbed by RLC noise caused by resistors, capacitors, phase modulators, etc. embedded in or connected to the printed circuit board 100.

However, according to the exemplary embodiment described with reference to fig. 1 to 5, the transmission line 170 may be spaced apart from the antennas 110a, 110b, and 110c by the display panel 140 interposed therebetween, and the antennas 110a, 110b, and 110c and the transmission line 170 may be connected to each other by the connection structures 180a, 180b, and 180c passing through the bezel region 65.

Accordingly, it is possible to realize an antenna drive having a short signal path and substantially no noise caused by various electronic devices and circuit devices mounted on the printed circuit board 100.

Fig. 7 and 8 are schematic cross-sectional views illustrating the configuration of a transmission line according to an exemplary embodiment.

Referring to fig. 7, as described above, the transmission line 170 may be disposed on the dielectric layer 160 formed on the display panel 140.

The dielectric layer 160 may include an insulating material having a predetermined dielectric constant. The dielectric layer 160 may include, for example, an inorganic insulating material such as glass, silicon oxide, silicon nitride, or metal oxide, or an organic insulating material such as epoxy resin, acrylic resin, imide-based resin, styrene-based resin, polyester-based resin, polyurethane-based resin, or the like.

In some embodiments, the dielectric constant of the dielectric layer 160 may be adjusted in a range of about 1.5 to about 12. If the dielectric constant exceeds about 12, the driving frequency may be excessively lowered, and the desired antenna driving of the high frequency band may not be achieved.

The transmission line 170 may include a signal line 171 and ground lines 173a and 173 b. In some embodiments, the signal line 171 may be disposed between a pair of ground lines 173a and 173 b.

In this case, the signal line 171 may be electrically connected to the antennas 110a, 110b, and 110c through the connection structures 180a, 180b, and 180 c. The ground lines 173a and 173b may be connected to ground wirings or ground patterns included in the connection structures 180a, 180b, and 180 c.

Referring to fig. 8, a transmission line 170 may be disposed on the top surface of the dielectric layer 160, and a ground layer 165 may be formed on the bottom surface of the transmission line 170.

In some embodiments, the conductive member included in the display panel 140 may serve as the ground layer 165. The conductive member may include, for example, a gate electrode of a Thin Film Transistor (TFT) included in the display panel 140, various wirings such as a scan line or a data line, or various electrodes such as a pixel electrode, a common electrode, or the like.

In one embodiment, the reflective electrode 155 included in the display panel 140 may serve as a ground layer 165.