Display panel, display module and display device

Abstract

The application provides a display panel, a display module and a display device. The display panel provided by the application comprises a color filter substrate, the color filter substrate comprises a color filter substrate base and a black matrix layer, the black matrix layer is located on the light-emitting side of the color filter substrate base, and a near field communication antenna is arranged on the first surface of the black matrix layer; the near field communication antenna is used for realizing the near field communication function of the display panel. The near field communication antenna is integrated on the surface of the black matrix layer, so that the space utilization inside the display panel is improved, and the thinning and integration of the display panel are facilitated.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to a display panel, display module, and display device. Background Technology

[0002] With the rapid integration of display technology and near field communication (NFC) technology, NFC technology has been widely used in electronic products such as touch display terminals, interactive displays, and smart card readers.

[0003] However, current NFC solutions generally adopt an external design with independent chips or modules, which requires separate installation space inside the device, resulting in low utilization of internal space and hindering the development of thinner and lighter devices. Summary of the Invention

[0004] This application provides a display panel, a display module, and a display device, which helps to achieve a thinner and lighter display panel with an integrated design.

[0005] In a first aspect, this application provides a display panel including a color filter substrate, the color filter substrate including a color filter base and a black matrix layer, the black matrix layer being located on the light-emitting side of the color filter base, and a near-field communication antenna being disposed on the first surface of the black matrix layer;

[0006] The near-field communication antenna is used to realize the near-field communication function of the display panel.

[0007] In conjunction with the first aspect, in one possible implementation, the first surface is the surface of the black matrix layer facing the light-emitting side of the color filter substrate.

[0008] In conjunction with the first aspect, in one possible implementation, the near-field communication antenna includes: a conductive layer arranged in a first pattern on the first surface.

[0009] In conjunction with the first aspect, in one possible implementation, the first pattern is a serpentine pattern, and the conductive layer extends along the serpentine pattern to form a coil.

[0010] In a second aspect, this application provides a display module, which includes a backlight module and a display panel as described in the first aspect or any possible implementation of the first aspect; The backlight module includes a backplate, and the material of the backplate includes a non-conductive material.

[0011] In conjunction with the second aspect, one possible implementation of the display module also includes: a near-field communication chip; The display panel further includes: a thin-film transistor array substrate disposed opposite to the color filter substrate, the thin-film transistor array substrate including a metal layer; The near-field communication antenna is connected to the metal layer via a conductive connector. The metal layer is electrically connected to the near-field communication chip via a driving flexible circuit board bonded to the edge of the display panel. The conductive connector is located between the color filter substrate and the thin-film transistor array substrate.

[0012] In conjunction with the second aspect, one possible implementation of the display module also includes: a near-field communication chip; The near-field communication antenna is electrically connected to the near-field communication chip via a flexible circuit board bonded to the edge of the color filter substrate.

[0013] In conjunction with the second aspect, in one possible implementation, the display module further includes: a connector; The near-field communication chip is connected to an external display control unit via the connector, and the display control unit is used to transmit display data to the display module.

[0014] In conjunction with the second aspect, in one possible implementation, the near-field communication chip includes: a first interface and a second interface; The near-field communication chip is used to send an interrupt signal to the display control unit through the first interface after receiving a near-field communication signal, and to transmit near-field communication information through the second interface.

[0015] Thirdly, this application provides a display device, which includes a display control unit and a display module as described in the second aspect or any possible implementation of the second aspect; The display control unit is used to transmit display data to the display module.

[0016] This application provides a display panel, a display module, and a display device. The technical solution provided in this application integrates the near-field communication (NFC) antenna with the first surface of a black matrix (BM) layer, achieving a unified design. Compared to a separate NFC antenna module, this effectively reduces the space occupied by the NFC antenna, contributing to a thinner and more integrated display panel. This application allows the BM layer to retain its traditional functions of light shielding, preventing light leakage, and improving color purity, while also serving as a substrate for the NFC antenna, thus integrating NFC functionality into the display panel. Furthermore, because the BM layer itself is opaque, placing the NFC antenna on the BM layer does not reduce the light transmittance of the display panel, thereby not adversely affecting its display performance. Attached Figure Description

[0017] Figure 1 A schematic structural diagram of a display panel provided in this application; Figure 2a A schematic structural diagram of an NFC antenna provided in this application; Figure 2b A schematic structural diagram of another NFC antenna provided in this application; Figure 3 A schematic structural diagram of a display module provided in this application; Figure 4a A schematic diagram illustrating an NFC antenna trace provided for this application; Figure 4b A schematic diagram illustrating an NFC antenna trace provided for this application; Figure 5 A schematic structural diagram of a display device provided in this application. Detailed Implementation

[0018] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Currently, near field communication (NFC) technology has been widely used in electronic products such as touch display terminals, interactive displays, and smart card readers.

[0020] However, current NFC solutions generally adopt an external design with independent chips or independent modules. For example, the NFC antenna in smart card readers is separated from the display screen. This means that the NFC antenna needs to be installed separately inside the smart card reader, resulting in low utilization of the internal space of the smart card reader and hindering the development of thinner and lighter devices.

[0021] This application provides a display panel, a display module, and a display device. The technical solution provided in this application integrates the NFC antenna into the display panel, eliminating the need for a separate NFC module. This improves the internal space utilization of the display device and facilitates a slim, integrated design. By providing a non-conductive area in the backplane of the display module, the shielding effect of the backplane on NFC signals is reduced, thereby improving the sensitivity and stability of NFC communication.

[0022] The following is combined Figures 1 to 5This application provides a detailed description of the technical solution provided.

[0023] Figure 1 This is a schematic structural diagram of a display panel provided in this application. Figure 1 As shown, the display panel 100 includes a color filter (CF) substrate 110. Figure 1 This is a longitudinal cross-sectional view of the display panel 100.

[0024] The CF substrate 110, from the light-incident side to the light-emitting side of the display panel 100, includes, in sequence: a CF substrate, a reflective film, a color resist layer, a protective film, and a transparent conductive film. The color resist layer includes: a red sub-pixel color resist, a green sub-pixel color resist, and a blue sub-pixel color resist, and a black matrix (BM) layer is disposed between adjacent sub-pixel color resists.

[0025] like Figure 1 As shown, the CF substrate is made of glass. The red subpixel color resist is as follows: Figure 1 The R color resist in the green subpixel color resist is as follows: Figure 1 In the G color resist, the blue sub-pixel color resist is as follows: Figure 1 Color resist B in the formula. For example... Figure 1 As shown, the red sub-pixel color resist mainly transmits red light, the green sub-pixel color resist mainly transmits green light, and the blue sub-pixel color resist mainly transmits blue light.

[0026] As can be seen, the BM layer is located on the light-emitting side of the CF substrate and is used to block the gap between the color resists of adjacent sub-pixels, which helps to improve color purity.

[0027] In this application, an NFC antenna is disposed on the first surface of the BM layer. The NFC antenna is used to implement the NFC function of the display panel 100. For example, the NFC antenna can be used to transmit and receive NFC signals to achieve NFC magnetic field coupling and data transmission.

[0028] The technical solution provided in this application integrates the NFC antenna with the BM layer by placing the NFC antenna on the first surface of the BM layer. Compared to a separate module for the NFC antenna, this effectively reduces the space occupied by the NFC antenna, contributing to a thinner and more integrated display panel. In this embodiment, the BM layer, while retaining its traditional functions of light shielding, preventing light leakage, and improving color purity, can also serve as a substrate for the NFC antenna, enabling the display panel to integrate NFC functionality. Furthermore, since the BM layer itself is opaque, placing the NFC antenna on the BM layer will not reduce the light transmittance of the display panel, thus avoiding any adverse effects on its display performance. It should be noted that the projection of the NFC antenna onto the CF substrate should be included within the projection of the BM layer onto the CF substrate.

[0029] In this application, the display panel, after integrating an NFC antenna, can directly serve as an interactive interface, allowing users to perform NFC operations through a specific area of ​​the display panel. It should be understood that this specific area refers to the location where the NFC antenna is positioned.

[0030] In one possible implementation, the first surface can be the light-emitting side of the BM layer facing the CF substrate, that is, the light-emitting side of the BM layer facing the display panel 100, such as... Figure 1 As shown.

[0031] In this implementation, the first surface is the surface of the BM layer closest to the light-emitting side of the display panel 100, which can shorten the distance between the NFC antenna and the external NFC reader / writer device, thereby improving the communication efficiency between the NFC antenna and the external NFC reader / writer device.

[0032] In one possible implementation, the NFC antenna may include a conductive layer arranged in a first pattern on a first surface.

[0033] In this implementation, the conductive layer can be a metallic conductive layer. The metallic conductive layer can be a copper layer, an aluminum layer, a silver layer, or an alloy layer, etc.

[0034] Figure 2a , Figure 2b This is a schematic structural diagram of the NFC antenna provided in this application. Figure 2a and Figure 2b The first pattern in the middle is a snake pattern.

[0035] As can be seen, the conductive layer extends along the serpentine pattern to form a coil, thus constituting a serpentine NFC antenna. It should be noted that a serpentine antenna, also known as a meander antenna, refers to a planar pattern in which the conductor traces are continuously bent into a serpentine shape.

[0036] Optionally, a first pattern can be etched onto the first surface, and then copper (Cu) can be plated onto the pattern to fill the etched antenna pattern. It should be understood that continuous, conductive copper traces on the first surface form the NFC antenna.

[0037] This embodiment extends the effective trace length of the NFC antenna within a limited area on the first surface using a serpentine pattern, enabling the NFC antenna to meet the inductance requirements of the NFC operating frequency band, thereby improving the sensitivity and stability of NFC communication.

[0038] In one possible implementation, the inductance of the NFC antenna with a serpentine routing can satisfy the following formula:

[0039] Where L is the inductance of the NFC antenna, D is the diameter of the NFC antenna, N is the number of turns of the NFC antenna, W is the width of the NFC antenna, and H is the height of the NFC antenna.

[0040] Taking an NFC antenna with copper traces as an example, when D is 2 micrometers (μm), N is 15, W is 2 μm, and H uses 1 / 10 ounce (oz) Cu, the inductance L of the NFC antenna can be obtained as 1.2 microhenries (µH), which meets the target inductance requirements for NFC communication. Therefore, the NFC antenna can be precisely matched to the NFC chip. The target inductance is 1 to 3 μH.

[0041] This application also provides a display module, which may include the display panel 100 described in the foregoing embodiments, such as... Figure 3 As shown. Figure 3 This is a longitudinal cross-sectional view of the module.

[0042] The display panel 100 further includes: a first polarizer (POL) 120, a liquid crystal layer 130, a thin film transistor (TFT) array substrate 140, and a second polarizer 150.

[0043] The first polarizer 120 is located on the light-emitting side of the CF substrate 110, the TFT array substrate 140 is located on the light-incident side of the CF substrate 110, the liquid crystal layer 130 is located between the CF substrate 110 and the TFT array substrate 140, and the second polarizer 150 is located on the light-incident side of the TFT array substrate 140.

[0044] like Figure 3 As shown, the display module also includes a backlight module 200 for providing uniform backlighting to the display panel 100. The backlight module 200 includes a backplate and a backlight source.

[0045] In this application, the backplane includes non-conductive areas to reduce the shielding of NFC signals and improve the sensitivity and stability of NFC communication. For example, some or all areas of the backplane can be made of non-conductive materials. Non-conductive materials include plastics, resins, insulating ceramics, etc.

[0046] In this application, the display module also includes an NFC chip (integrated circuit, IC). As shown in Figure 2, the NFC chip is connected to the NFC antenna. The NFC chip is used to demodulate, decode, and process the signals received by the NFC antenna, and outputs the processed NFC signals to an external display control unit. At the same time, it drives the NFC antenna to emit corresponding response signals. The two work together to realize the near-field identification, data interaction, and communication functions of the display panel.

[0047] Optionally, the NFC chip can be located on a flexible printed circuit assembly (FPCA) or a rigid printed circuit board assembly (PCBA).

[0048] In one possible implementation, the NFC antenna can be connected to a metal layer in the TFT array substrate 140 via a conductive connector. The metal layer is connected to the NFC chip on the FPCA or PCBA via a driving FPC attached or bonded to the edge of the display panel 100. Figure 4a As shown. Figure 4a This is a top view of the module.

[0049] As can be seen, the two ends of the NFC antenna with the serpentine wiring are connected to the TFT array substrate 140 through conductive connectors.

[0050] Optionally, the conductive connector can be a gold ball (Au Ball).

[0051] Optionally, the metal layer can be the top metal layer on the TFT array substrate.

[0052] In one possible implementation, the NFC antenna can be directly connected to the NFC chip on the FPCA or PCBA via an FPC bonded to the edge of the CF substrate 110, such as... Figure 4b As shown. Figure 4b This is a top view of the module.

[0053] It can be seen that the two ends of the NFC antenna with the serpentine trace are connected to the FPC at the edge of the CF substrate 110.

[0054] In this embodiment, two routing methods for the NFC antenna and NFC chip are provided to adapt to different process requirements, which has the advantage of facilitating mass production.

[0055] In this application, the display module also includes a connector. The NFC chip can connect to an external display control unit via the connector. The display control unit is used to transmit display data to the display module.

[0056] The present invention also provides a display device, which includes: a display control unit and a display module as described in the foregoing embodiments.

[0057] The display device can be an interactive display screen, a bus card reader screen, an access control display terminal, an industrial touch display device, etc.

[0058] Optionally, the display control unit may include components with data processing and display driving capabilities, such as a field-programmable gate array (FPGA), a graphics processing unit (GPU), or a microcontroller unit (MCU). The display control unit is used to transmit display data to the display module and process NFC communication information.

[0059] Figure 5 This is a schematic structural diagram of a display device provided in this application. Figure 5 As shown, the display device 500 includes a display module and a display control unit.

[0060] The display module is connected to the MCU in the display control unit via a connector. The display module includes an NFC antenna and an NFC chip, with the NFC antenna connected to the NFC chip. The NFC chip includes a first interface and a second interface. The first interface is as follows... Figure 5 The interrupt request (IRQ) interface, the second interface is as follows Figure 5 The inter-integrated circuit (I2C) interface includes a serial data (SDA) interface and a serial clock (SCL) interface.

[0061] The NFC chip, upon receiving an NFC signal, sends an interrupt signal to the display control unit via a first interface to indicate that an NFC communication event has occurred, and transmits specific NFC communication information via a second interface, so that the display control unit can transmit display data to the display module. This display data includes displaying NFC interactive information within the display area corresponding to the NFC antenna.

[0062] Optional NFC interaction information includes, for example, NFC card swipe results and transaction data.

[0063] In this application, the user experience can be improved by intuitively displaying NFC information on the display panel.

[0064] This application integrates an NFC antenna onto the first surface of the BM layer in the display panel and works with an NFC chip to achieve near-field interaction on the front of the screen, thereby improving the internal space utilization of the display device and helping to reduce the thickness of the display device.

[0065] In the description of this invention, it should be noted that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0066] In the description of this invention, it should be noted that the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0067] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this invention described above can be combined with each other as long as they do not conflict with each other.

[0068] It should be emphasized that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A display panel comprising a color filter substrate, the color filter substrate comprising a color filter base and a black matrix layer, characterized in that, The black matrix layer is located on the light-emitting side of the color filter substrate, and a near-field communication antenna is disposed on the first surface of the black matrix layer; The near-field communication antenna is used to realize the near-field communication function of the display panel.

2. The display panel according to claim 1, characterized in that, The first surface is the light-emitting side of the black matrix layer facing the color filter substrate.

3. The display panel according to claim 2, characterized in that, The near-field communication antenna includes a conductive layer arranged in a first pattern on the first surface.

4. The display panel according to claim 3, characterized in that, The first pattern is a serpentine pattern, and the conductive layer extends along the serpentine pattern to form a coil.

5. A display module, characterized in that, include: Backlight module and display panel as described in any one of claims 1 to 4; The backlight module includes a backplate, and the material of the backplate includes a non-conductive material.

6. The display module according to claim 5, characterized in that, Also includes: Near field communication chip; The display panel further includes: a thin-film transistor array substrate disposed opposite to the color filter substrate, the thin-film transistor array substrate including a metal layer; The near-field communication antenna is connected to the metal layer via a conductive connector. The metal layer is electrically connected to the near-field communication chip via a driving flexible circuit board bonded to the edge of the display panel. The conductive connector is located between the color filter substrate and the thin-film transistor array substrate.

7. The display module according to claim 5, characterized in that, Also includes: Near field communication chip; The near-field communication antenna is electrically connected to the near-field communication chip via a flexible circuit board bonded to the edge of the color filter substrate.

8. The display module according to claim 6 or 7, characterized in that, Also includes: Connector; The near-field communication chip is connected to an external display control unit via the connector, and the display control unit is used to transmit display data to the display module.

9. The display module according to claim 8, characterized in that, The near-field communication chip includes: a first interface and a second interface; The near-field communication chip is used to send an interrupt signal to the display control unit through the first interface after receiving a near-field communication signal, and to transmit near-field communication information through the second interface.

10. A display device, characterized in that, Includes a display control unit and a display module as described in any one of claims 5 to 9; The display control unit is used to transmit display data to the display module.

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