CN113990250B

CN113990250B - Display module and display device

Info

Publication number: CN113990250B
Application number: CN202111253823.1A
Authority: CN
Inventors: 赖勐; 钟晨; 杨金金; 袁永
Original assignee: Xiamen Tianma Display Technology Co Ltd
Current assignee: Xiamen Tianma Display Technology Co Ltd
Priority date: 2021-10-27
Filing date: 2021-10-27
Publication date: 2023-01-31
Anticipated expiration: 2041-10-27
Also published as: CN113990250A

Abstract

The invention discloses a display module and a display device, and relates to the technical field of display, wherein the display module comprises a display panel, a multi-path selector and at least two parallel-connected selection branches; each selection branch is electrically connected with the multiplexer, and the multiplexer is used for conducting at least one selection branch to enable the conducted selection branch to be electrically connected with the display panel. Under different application scenes, different selection branches can be correspondingly gated to be electrically connected with the display panel, and the application flexibility of the display module and the display device is favorably improved.

Description

Display module and display device

Technical Field

The invention relates to the technical field of display, in particular to a display module and a display device.

Background

From the CRT (Cathode Ray Tube) era to the liquid crystal era and now to the OLED (Organic Light-Emitting Diode) era, the display industry has been developing more and more over decades. The display industry is closely related to our life, and the display technology cannot be separated from the traditional mobile phones, flat panels, televisions and PCs to the existing intelligent wearable devices and VR and other electronic devices.

With the continuous development of electronic display technology, users have higher and higher requirements for display products of electronic devices. For example, the display product can adopt different scanning frequencies according to different use scenes so as to realize the display requirements of different scanning frequencies. When the application of the display module is required, how to switch the signals of the display panel under different application requirements becomes one of the technical problems to be solved urgently at the present stage.

Disclosure of Invention

In view of this, the present invention provides a display module and a display device, which can correspondingly gate different selection branches to be electrically connected to a display panel in different application scenarios, so as to implement signal switching under different application requirements, and facilitate improvement of application flexibility of the display module and the display device.

In a first aspect, the present application provides a display module, including a display panel, a multiplexer, and at least two parallel-connected selection branches;

each of the selection branches is electrically connected to the multiplexer, and the multiplexer is configured to connect at least one of the selection branches, so that the connected selection branch is electrically connected to the display panel.

In a second aspect, the present application provides a display device including the display module provided in the embodiments of the present application.

Compared with the prior art, the display module and the display device provided by the invention at least realize the following beneficial effects:

in the display module and the display device provided by the invention, the display module comprises a display panel, a multiplexer and at least two parallel-connected selection branches, wherein the multiplexer is used for conducting at least one selection branch so as to electrically connect the conducted selection branch with the display panel. When the display module assembly is applied to different application scenes, the controllable multi-path selector switches on different selection branches, so that the selection branches are electrically connected with the display panel, signal transmission between the selection branches and the display panel is realized, the switching of signals transmitted between the selection branches and the display panel under different application scenes is met, and the application flexibility of the display module assembly and the display device is favorably improved.

Of course, it is not necessary for any product in which the present invention is practiced to achieve all of the above-described technical effects simultaneously.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic structural diagram of a display module according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of another display module according to an embodiment of the disclosure;

fig. 3 is a schematic structural diagram of a display module according to an embodiment of the invention;

fig. 4 is a schematic structural diagram of a display module according to an embodiment of the invention;

fig. 5 is a schematic structural diagram of a display module according to an embodiment of the invention;

fig. 6 is a schematic structural diagram of a display module according to an embodiment of the invention;

fig. 7 is a schematic connection diagram of a display panel, a multiplexer and a selection branch in the display module according to the embodiment of the present invention;

fig. 8 is a schematic structural diagram of a display module according to an embodiment of the invention;

fig. 9 is a schematic structural view of another display module according to an embodiment of the disclosure;

fig. 10 is a schematic structural diagram of a display module according to an embodiment of the invention;

fig. 11 is a schematic film layer diagram of a display panel according to an embodiment of the invention;

fig. 12 is a top view of a display device according to an embodiment of the invention.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

Fig. 1 is a schematic structural diagram of a display module according to an embodiment of the present invention, in which a multiplexer and a selection branch are illustrated in a block diagram, and do not represent actual structures of the multiplexer and the selection branch.

Referring to fig. 1, the display module according to the embodiment of the present invention includes a display panel 100, a multiplexer SW and at least two parallel selection branches ZL, each selection branch ZL is electrically connected to the multiplexer SW, and the multiplexer SW is configured to connect at least one selection branch ZL, so that the connected selection branch ZL is electrically connected to the display panel 100.

It should be noted that fig. 1 only illustrates the display panel 100 in the present invention by taking the display panel 100 with a rectangular structure as an example, in some other embodiments of the invention, the display panel 100 may also be embodied as a rounded rectangle, a circle, or another shape including a special-shaped edge, which is not limited in this respect. Optionally, the display panel 100 includes a display area, and the display area includes a plurality of sub-pixels (not shown in the figure), and in the display stage, the sub-pixels of the display area perform a display function.

Specifically, the display module 300 according to the embodiment of the present disclosure includes a multiplexer SW and at least two parallel-connected selection branches ZL, in addition to the display panel 100, the multiplexer SW is configured to connect at least one selection branch ZL, so that the connected selection branch ZL is electrically connected to the display panel 100. When the display module 300 is applied to different application scenes, the multiplexer SW may be controlled to switch on different selection branches ZL, so that the selection branches ZL are electrically connected with the display panel 100, thereby realizing signal transmission between the selection branches ZL and the display panel 100, and satisfying the switching of signals transmitted between the selection branches ZL and the display panel 100 in different application scenes, thereby facilitating the improvement of the application flexibility of the display module 300.

It should be understood that fig. 1 only illustrates the connection relationship among the display panel 100, the multiplexer SW and the selection branch ZL in the display module 300, and does not represent the actual relative position relationship, and the present invention will be described in detail in the following embodiments for the relative position relationship among the display panel 100, the multiplexer SW and the selection branch ZL. In addition, fig. 1 only illustrates that the display module 300 includes three selecting branches ZL, and the specific number of the selecting branches ZL included in the display module 300 is not limited, in some other embodiments of the present invention, the number of the selecting branches ZL included in the display module 300 may be two or more according to actual requirements, and the present invention is not limited thereto.

In order to meet the use requirements of users in different application environments, the display panel 100 may correspond to at least two different scanning frequencies, for example, two situations, i.e., high frequency scanning and low frequency scanning, are included, and when the high frequency scanning is performed, the refresh frequency of the display panel 100 is higher; when the low frequency scanning is performed, the refresh frequency of the display panel 100 is low. When the refresh frequency of the display panel 100 is high, the frequency of the coupling noise to which the display panel 100 is subjected is also high; when the refresh frequency of the display panel 100 is low, the frequency of the coupled noise to which the display panel 100 is subjected is also low. When the display panel 100 is switched between different sweep frequencies, the coupling noise to which the display panel 100 is subjected also varies. Therefore, it is necessary to reduce or weaken the coupling noise to which the display panel 100 is subjected at different scanning frequencies to improve the display effect of the display panel 100 at different scanning frequencies.

Therefore, with reference to fig. 1, the selecting branch ZL in the display module 300 according to the embodiment of the present invention may include a protection device (not shown in the drawing), when the selecting branch ZL is turned on, the protection device in the selecting branch ZL can perform operations such as filtering the coupling noise on the display panel 100, for example, different selecting branches ZL may be set for different scanning frequencies of the display panel 100, the selecting branch ZL corresponding to the scanning frequency is turned on at a certain scanning frequency, and the selecting branch ZL is used to perform operations such as filtering the coupling noise at the scanning frequency, so as to reduce or weaken the influence of the coupling noise at different scanning frequencies on the display, thereby facilitating the improvement of the display effect of the display module at different scanning frequencies, and further facilitating the improvement of the experience effect for use.

Fig. 2 is another structural diagram of a display module 300 according to an embodiment of the present invention, in which the structure of the selection branch ZL is detailed in fig. 2, and the protection device included in the selection branch ZL may include a storage capacitor C, for example.

Referring to fig. 2, in an alternative embodiment of the present invention, the selection branch ZL includes a storage capacitor C, one end of the storage capacitor C is connected to the multiplexer SW, and the other end is grounded; at least some of the selection branches ZL include storage capacitors C having different capacitance values.

Specifically, in the embodiment, the selecting branch ZL includes the storage capacitor C as an example for description, when the display module 300 includes two selecting branches ZL, capacitance values of the storage capacitors C included in the two selecting branches ZL are different; when the display module 300 includes three or more selection branches ZL, the capacitance values of the storage capacitors C included in at least two selection branches ZL are different. When the gating circuit switches on a certain selection branch ZL, the storage capacitor C in the switched-on selection branch ZL is electrically connected to the display panel 100, and coupling noise generated in the display panel 100 can be conducted to the storage capacitor of the selection branch ZL, so that the coupling noise is filtered. When the refresh frequency of the display panel 100 is high, the frequency of the coupling noise received by the signal in the display panel 100 is high, and at this time, the storage capacitor C with a small capacitance value may be selected to filter the high-frequency coupling noise, so that the display panel 100 obtains better driving stability in the mode with the high refresh frequency. When the refresh frequency of the display panel 100 is low, the frequency of the coupling noise received by the signal in the display panel 100 is low, and at this time, the storage capacitor C with a large capacitance value may be selected to filter the low-frequency coupling noise, so that the display panel 100 obtains better driving stability in the mode with a low refresh frequency.

It is assumed that the display panel 100 has three display modes with different frequencies, which are a first frequency display mode, a second frequency display mode and a third frequency display mode, wherein the first frequency is greater than the second frequency, and the second frequency is greater than the third frequency. The selection branch ZL includes a first selection branch ZL1, a second selection branch ZL2, and a third selection branch ZL3, wherein a capacitance value of a first capacitor C1 included in the first selection branch ZL1 is greater than a capacitance value of a second capacitor C2 included in the second selection branch ZL2, and a capacitance value of a second capacitor C2 included in the second selection branch ZL2 is greater than a capacitance value of a third capacitor C3 included in the third selection branch ZL 3. In the first frequency display mode, the third selecting branch ZL3 is selectively turned on, so that the third capacitor C3 is electrically connected to the display panel 100; in the second frequency display mode, the second selection branch ZL2 is selectively turned on, so that the second capacitor C2 is electrically connected to the display panel 100; in the third frequency display mode, the first selection branch ZL1 is selectively turned on, such that the first capacitor C1 is electrically connected to the display panel 100. Therefore, the coupling noise filtering function in different frequency display modes is achieved, and the display panel 100 has a better display effect in the different frequency display modes.

Fig. 3 is a schematic structural diagram of a display module 300 according to an embodiment of the present invention, which is a further refinement of the structure of the selecting branch ZL.

Referring to fig. 3, in an alternative embodiment of the present invention, the selection branch ZL further includes a current limiting resistor R and a diode D, the current limiting resistor R and the diode D are respectively connected in parallel with the storage capacitor, an anode of the diode D is grounded, and a cathode of the diode D is connected to the multiplexer SW.

Specifically, in fig. 3, the display module 300 is illustrated as including two selection branches ZL, each of the selection branches ZL includes a storage capacitor C, a current limiting resistor R, and a diode D connected in parallel, where one end of each of the storage capacitor C, the current limiting resistor R, and the diode D is connected to the multiplexer SW, and the other end of each of the storage capacitor C, the current limiting resistor R, and the diode D is grounded. The diode D has a positive terminal grounded and a negative terminal connected to the multiplexer SW. Optionally, the reverse breakdown voltages of the diodes D in different selection branches ZL are different, and the resistance values of the current limiting resistors R in different selection branches ZL are different. When setting up diode D in selecting branch ZL, diode D can go out the static conduction on display panel 100, causes the influence to the device in the display module assembly 300 when avoiding static great. When the diodes D with different reverse breakdown voltage values are disposed in different selection branches ZL, the display module 300 can meet different static conduction requirements, and has a better static protection effect. Set up current-limiting resistor R in selecting branch ZL, when the instantaneous voltage is great in display panel 100, current-limiting resistor R can play the effect of partial pressure, avoids the effect of instantaneous voltage and produces great instantaneous heavy current and lead to damaging the device in the display module assembly 300, consequently is favorable to playing the guard action of preferred to display module assembly 300. When the current-limiting resistors R with different resistances are arranged in different selection branches ZL, the voltage-dividing requirements of different instantaneous voltages can be met, and the protection requirements of the display module 300 under different instantaneous voltages can be met.

Fig. 4 is another schematic structural diagram of the display module 300 according to the embodiment of the invention, in which the display module 300 includes a constant voltage signal line L.

Referring to fig. 4, in an alternative embodiment of the invention, the display module 300 further includes a constant voltage signal line L, the constant voltage signal line L is electrically connected to the display panel 100, the same constant voltage signal line L includes a first branch L1 and a second branch L2, the first branch L1 is connected to at least one of the selecting branches ZL through the multiplexer SW, and the second branch L2 is connected to the display panel 100.

Specifically, the pixels in the display panel 100 have a display function by being driven by a pixel driving circuit that drives the pixels to emit light by a signal such as a scan signal, an initialization signal, or a power supply signal transmitted through the constant voltage signal line L. In this embodiment, the constant voltage signal line L has two branches, wherein the first branch L1 is connected to the multiplexer SW, and when the multiplexer SW turns on a certain selection branch ZL, the constant voltage signal line L and the selection branch ZL can be electrically connected. A second branch L2 of the constant voltage signal line L is connected to the display panel 100 for supplying a constant voltage signal to the pixels in the display panel 100.

Because the first branch L1 of constant voltage signal line L can form the electricity through gating circuit and select branch ZL and be connected, when having great ripple influence on constant voltage signal line L, the protective device in the accessible selects branch ZL filters the ripple to guarantee the stability of the last signal of transmitting of constant voltage signal line, promote display panel's drive stability.

Optionally, the constant voltage signal line L in the embodiment of the present invention is a PVDD signal line or a PVEE signal line. Optionally, the constant voltage signal line L in the embodiment of the present invention may also be another signal line with a constant voltage in the display module 300, which is not specifically limited in the present invention.

Fig. 5 is a schematic structural diagram of a display module 300 according to an embodiment of the invention, which illustrates a schematic structural diagram of the display module 300 including a control chip IC-1.

In an alternative embodiment of the present invention, the display module 300 further includes a control chip IC-1, the control chip IC-1 is electrically connected to the display panel 100, the control chip IC-1 includes at least two voltage terminals T, the selection branch ZL includes the voltage terminals T, the voltage signals output by the voltage terminals T included in different selection branches ZL are different, each voltage terminal T is connected to a first terminal of the multiplexer SW, and a second terminal of the multiplexer SW is connected to the display panel 100 for transmitting a signal of one voltage terminal T to the display panel 100.

Specifically, the voltage terminal T of the control chip IC-1 is electrically connected to the multiplexer SW through different first signal lines X1, the selection circuit can be regarded as the voltage terminal T of the control chip IC-1 and the first signal line X1 connected to the voltage terminal T, different voltage terminals T of the control chip IC-1 can output different voltage signals, that is, different selection branches ZL can correspondingly transmit different voltage signals. The other end of the multiplexer SW is electrically connected to the display panel 100 through a second signal line X2. When the multiplexer SW selects to turn on a certain selection circuit, the voltage terminal T in the selection circuit will be able to transmit the corresponding voltage signal to the display panel 100.

The signals transmitted by the control chip IC-1 to the pixel circuits of the display panel 100 may include, for example, high-level signals and low-level signals, and the voltages of the high-level signals transmitted by the control chip IC-1 may not be the same and the voltages of the low-level signals transmitted by the control chip IC-1 may not be the same for different display and driving schemes. In this case, since the selection branch ZL for transmitting different voltage signals is introduced in the embodiment of the present invention, for example, when a high level signal corresponding to a first voltage value needs to be transmitted, the selection branch ZL is selected to be turned on; when a high level signal corresponding to a second voltage value (the second voltage value is different from the first voltage value) needs to be transmitted, the other corresponding selecting branch ZL is selectively turned on. Therefore, different voltage signals can be sent to the display panel 100 through one control chip IC-1 according to different display and driving requirements, and a plurality of control chips IC-1 do not need to be arranged for the display panel 100, so that the application flexibility of the display module 300 is improved, and the whole structure of the display module 300 is simplified.

Fig. 6 is another schematic structural diagram of the display module 300 according to the embodiment of the invention, which illustrates a structural diagram of the display module 300 including a touch chip TP-IC.

Referring to fig. 6, in an alternative embodiment of the present invention, the selection branch ZL includes touch chips TP-IC, and different selection branches include different touch chips TP-IC; the first terminal of the multiplexer SW is electrically connected to the display panel 100, and the second terminal of the multiplexer SW is connected to a different touch chip TP-IC.

Specifically, the selection branch ZL in the embodiment shown in fig. 6 includes at least two touch chips TP-IC, different touch chips TP-IC are electrically connected to the multiplexer SW through different signal lines, and the multiplexer SW is electrically connected to the display panel 100. For the display module 300 with touch function, different touch requirements need to match with the touch chips TP-ICs of different signals, and the embodiment of the present invention introduces at least two touch chips TP-ICs, and selects the touch chip TP-IC that needs to be electrically connected to the display panel 100 through the multiplexer SW, for example, in the first touch mode, when the touch chip TP-IC of the first type needs to be turned on, the multiplexer SW is used to electrically connect the corresponding touch chip TP-IC of the first type to the display panel 100, so that the touch chip TP-IC of the first type can realize signal transmission with the touch electrode on the display panel 100. In the second touch mode, when the touch chips TP-IC of the second type need to be turned on, the multiplexer SW is used to electrically connect the corresponding touch chips TP-IC of the second type with the display panel 100, so that the touch functional chips of the second type can realize signal transmission with the touch electrodes on the display panel 100. Therefore, the touch control chips TP-IC with different models are matched for different touch control requirements, and the touch control switching flexibility of the display module 300 is improved, and the use experience effect of a user is improved.

It is understood that fig. 6 only illustrates the display module 300 including two touch chips TP-IC, and when two touch chips TP-IC are included, the models of the two touch chips TP-IC are different. In some other embodiments of the invention, the display module 300 may further include three or more touch chips TP-IC according to different touch requirements, which is not specifically limited in the invention.

In an optional embodiment of the invention, when at least two touch chips TP-IC are disposed in the display module 300, the display module 300 further includes a touch signal detector (not shown in the drawings), which is electrically connected to the display panel 100 and is configured to detect a touch signal of the display panel 100 and control the multiplexer SW to switch on different touch chips TP-IC according to the touch signal. Optionally, the touch detector may be disposed at any position on the display module, as long as the touch detector can be electrically connected to the touch signal line on the display panel, and can detect the touch signal.

Specifically, the embodiment of the present invention introduces the touch signal detector to detect the touch signal on the display panel 100, and controls the multiplexer SW to turn on the corresponding touch chip TP-IC according to the magnitude of the touch signal. In this way, the corresponding touch chips TP-IC are selected according to the actual touch signals in the display panel 100, so that the selection process of the touch chips TP-IC is more accurate.

Optionally, when the display module 300 includes a touch signal detector, the touch signal detector may be integrated in a control chip IC-1 of the display module 300, and when a change of the touch signal is detected and the touch chip TP-IC needs to be switched, the control chip IC-1 may be used to control the multiplexer SW, so that the multiplexer SW may turn on the corresponding control chip IC-1. The manner of integrating the touch signal detector with the control chip IC-1 is also beneficial to simplifying the overall structure of the display module 300.

Fig. 7 is a schematic diagram illustrating a connection of a display panel, a multiplexer, and a selection branch in a display module according to an embodiment of the present invention, in which the structure of the multiplexer SW is detailed and the selection branch ZL is illustrated in a frame structure.

Referring to fig. 7, in an alternative embodiment of the present invention, the multiplexer SW includes a plurality of switching transistors M, and the selecting branches ZL are respectively connected to different switching transistors M; the control end of each switching transistor M is respectively connected with different control signal ends K. Fig. 7 only illustrates that the multiplexer SW includes three switching transistors M, and in some other embodiments of the present invention, the multiplexer SW may further include two or more switching transistors, which is not limited in this respect. In fig. 7, the control terminals of the three switching transistors M are respectively connected to the first control signal terminal K1, the second control signal terminal K2 and the third control signal terminal K3.

Specifically, in the display module 300 according to the embodiment of the invention, the multiplexer SW includes the switching transistors M, and optionally, the number of the switching transistors M included in the multiplexer SW is the same as the number of the selection branches ZL in the display module 300, that is, the switching transistors M and the selection branches ZL are arranged in a one-to-one correspondence. Alternatively, the first pole of the switching transistor M is connected to the display panel 100, the second pole is connected to the selection branch ZL, and the control terminal is connected to the control signal terminal K. Optionally, the control signal terminals K corresponding to different switching transistors M are different, so as to control whether different switching transistors M are turned on or off. When the display panel 100 includes the control chip IC-1, the control signal terminal K may be integrated on the control chip IC-1, for example, and different switching transistors M are controlled by different control signal terminals K of the control chip IC-1. Different switch transistors M are controlled by different control signal terminals K, so that independent control over different switch transistors M is realized, a certain switch transistor M can be independently conducted according to requirements in actual application, and two or more switch transistors M can also be simultaneously conducted, so that the control of the multiplexer SW is more flexible.

Fig. 8 is a schematic diagram of another structure of the display module 300 according to the embodiment of the present invention, which illustrates a structure of the display module 300 including both the control chip IC-1 and the multiplexer SW.

Referring to fig. 8, in an alternative embodiment of the present invention, the display module 300 further includes a control chip IC-1, and the multiplexer SW is integrated on the control chip IC-1.

Particularly, when the multiplexer SW is integrated with the control chip IC-1, a spatial position does not need to be separately set for the multiplexer SW in the display module 300, so that the display module 300 is more flexible in application and is also beneficial to realizing high integration of the display module 300.

Fig. 9 is a schematic diagram of another structure of the display module 300 according to an embodiment of the invention, which illustrates another structure of the display module 300 including both the control chip IC-1 and the multiplexer SW.

Referring to FIG. 9, in an alternative embodiment of the present invention, the display module 300 further includes a selection chip IC-2 and a control chip IC-1, the selection chip IC-2 is bound to the display panel 100, and the multiplexer SW is integrated with the selection chip IC-2.

Specifically, this embodiment shows a scheme that the display module 300 includes both the selection chip IC-2 and the control chip IC-1, and optionally, both the selection chip IC-2 and the binding chip are bound in the non-display area of the display panel 100, wherein the multiplexer SW in the present invention is integrated with the selection chip IC-2. The embodiment of the invention separately sets the selection chip IC-2, and controls the selection of the multiplexer SW for the selection branch ZL by utilizing the selection chip IC-2, thereby being more beneficial to improving the accuracy and the reliability of the selection function. It should be noted that, when the multiplexer SW is integrated on the selection chip IC-2, the signal of the control signal terminal of the multiplexer SW is provided by the selection chip IC-2, that is, the selection chip IC-2 controls the on/off of the switch transistor in the multiplexer.

Fig. 10 is a schematic view of another structure of the display module 300 according to the embodiment of the present invention, which shows a structure of the display module 300 including the flexible printed circuit FPC and the multiplexer SW.

Referring to fig. 10, in an alternative embodiment of the present invention, the display module 300 further includes a flexible printed circuit board FPC bonded to the display panel 100, and the multiplexer SW is bonded to the flexible printed circuit board FPC.

Specifically, the flexible printed circuit board FPC is introduced into the display module 300 according to the embodiment of the present invention, and when the display module 300 includes the flexible printed circuit board FPC, the multiplexer SW may be similarly bound to the flexible printed circuit board FPC, and the flexible printed circuit board FPC is folded back to the back of the display panel 100 in practical application, so that the introduction of the multiplexer SW does not occupy the space of the frame of the display module 300, and the design of the narrow lower frame of the display module 300 is facilitated while the application flexibility of the display module 300 is improved by using the multiplexer SW.

When the display module 300 comprises the flexible printed circuit FPC, the control chip IC-1 can be bound on the display panel 100 or bound on the flexible printed circuit FPC, and when the control chip IC-1 is bound on the flexible printed circuit FPC and the flexible printed circuit FPC bound with the control chip IC-1 is reversely folded to the back of the display panel 100, the structure can reduce the lower frame of the display module 300 and realize the design of a narrow lower frame.

In the display module 300 according to the embodiment of the invention, the display panel 100 may be an organic light emitting display panel 100, or may also be a liquid crystal display panel 100, which is not particularly limited in the invention.

When the display panel provided by the embodiment is an organic light emitting display panel, the organic light emitting display panel has the advantages of self-luminescence, high brightness, wide viewing angle and quick response, a backlight lamp is not needed, a thin organic material coating and a glass substrate can be adopted, when current flows, the organic materials can emit light, the organic light emitting display panel can be made lighter and thinner, the viewing angle is larger, and electric energy can be obviously saved. Fig. 11 is a schematic film layer diagram of a display panel according to an embodiment of the present invention, and optionally, the display panel includes a substrate 10, an array layer 20, a light emitting device layer 30, and the like. The substrate 10 of this embodiment may be used as a carrier for carrying other structures of a display panel, and the substrate 10 may be a glass substrate, and may also be a flexible substrate, which is not specifically limited in this embodiment. The array layer 20 on one side of the substrate 10 may include a gate metal layer, a source/drain metal layer, an active layer, and an insulating layer (not shown) between the conductive film layers for forming a light emitting control unit of the light emitting device 301 of the light emitting device layer 30. The pixel defining layer 50 located on the side of the array away from the substrate 10 is used to define the arrangement position of each light emitting device 301 of the light emitting device layer 30, the pixel defining layer 50 may include a plurality of openings, the openings may at least penetrate through the pixel defining layer 50 along the direction in which the pixel defining layer 50 points perpendicularly to the substrate 10, and the light emitting device 301 of the light emitting device layer 30 is arranged in each opening, that is, the orthographic projection of the light emitting device 301 to the light emitting surface of the display panel and the orthographic projection of the opening K to the light emitting surface of the display panel 100 are overlapped. Each light emitting device 301 includes a first electrode 301A, a light emitting portion 301B, and a second electrode 301C on a side of the array layer 20 away from the substrate 10; each opening of the pixel defining layer 50 is used to expose the first electrode 301A of the light emitting device 301, optionally, the first electrode 301A may be an anode, and the second electrode 301C may be a cathode, when a current passes through the first electrode 301A and the second electrode 301C and forms an electric field between the first electrode 301A and the second electrode 301C, the light emitting portion 301B emits light, the light emitting principle of the light emitting device 301 can be understood by referring to the structure and principle of an organic light emitting device in the related art, and this embodiment is not described herein again. Optionally, the display panel 100 further includes an encapsulation layer 40 located on a side of the light emitting device layer 30 away from the substrate 10, for encapsulating and protecting the light emitting device 301 of the light emitting device layer 30, and optionally, the encapsulation layer 40 may include a stacked structure of an inorganic layer, an organic layer, and a plurality of film layers of the inorganic layer.

Based on the same inventive concept, the present invention further provides a display device, and fig. 12 is a top view of the display device according to the embodiment of the present invention, wherein the display device 200 includes the display module 300 according to any of the embodiments. When the multi-path selector and the selection branch are introduced into the display device, different selection branches can be correspondingly conducted when the scanning frequencies of the display device are different, and the switching of signals transmitted between the selection branches and the display panel under different application scenes is met, so that the application flexibility of the display device is favorably improved.

It should be noted that, for the embodiments of the display device provided in the embodiments of the present application, reference may be made to the embodiments of the display panel, and repeated descriptions are omitted. The apparatus provided herein may be embodied as: any product or component with practical functions such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.

In summary, the display module and the display device provided by the invention at least achieve the following beneficial effects:

Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A display module is characterized by comprising a display panel, a multiplexer and at least two parallel-connected selection branches;

each selection branch is electrically connected with the multiplexer, and the multiplexer is used for conducting at least one selection branch to enable the conducted selection branch to be electrically connected with the display panel;

the selection branch comprises a storage capacitor, one end of the storage capacitor is connected with the multiplexer, and the other end of the storage capacitor is grounded; the capacitance values of the storage capacitors contained in at least two of the selection branches are different.

2. The display module according to claim 1, wherein the selection branch further comprises a current-limiting resistor and a diode, the current-limiting resistor and the diode are respectively connected in parallel with the storage capacitor, an anode of the diode is grounded, and a cathode of the diode is connected to the multiplexer.

3. The display module of claim 1, further comprising a constant voltage signal line electrically connected to the display panel, wherein the same constant voltage signal line comprises a first branch and a second branch, the first branch is connected to at least one of the selection branches via the multiplexer, and the second branch is connected to the display panel.

4. The display module of claim 1, further comprising a control chip electrically connected to the display panel; the control chip comprises at least two voltage ends, the selection branches comprise the voltage ends, voltage signals output by the voltage ends and contained by the different selection branches are different, the voltage ends are connected with the first end of the multiplexer, the second end of the multiplexer is connected with the display panel, and the control chip is used for transmitting a signal of one voltage end to the display panel.

5. The display module of claim 1, wherein the selection branches comprise touch chips, and different selection branches comprise different touch chips; the first end of the multiplexer is electrically connected with the display panel, and the second end of the multiplexer is connected with different touch chips.

6. The display module according to claim 5, further comprising a touch signal detector electrically connected to the display panel for detecting a touch signal of the display panel and controlling the multiplexer to switch on different touch chips according to the touch signal.

7. The display module according to claim 1, wherein the multiplexer comprises a plurality of switching transistors, and the selection branches are respectively connected to different switching transistors; and the control end of each switching transistor is respectively connected with different control signal ends.

8. The display module of claim 1, further comprising a control chip, wherein the multiplexer is integrated with the control chip.

9. The display module of claim 1, further comprising a selection chip and a control chip, wherein the selection chip is bonded to the display panel, and the multiplexer is integrated with the selection chip.

10. The display module of claim 1, further comprising a flexible printed circuit board bound to the display panel, wherein the multiplexer is bound to the flexible printed circuit board.

11. A display device, comprising the display module according to any one of claims 1 to 10.