Display module, display device and driving method

Abstract

The invention provides a display module, a display device and a driving method, and the display module comprises a touch display driving circuit which comprises a touch driving circuit and a display driving circuit; the touch driving circuit is electrically connected with the first power supply signal end and the second power supply signal end; and the switching circuit is electrically connected with the display driving circuit, the first power supply signal end and the second power supply signal end, and is configured to switch on or switch off the first power supply signal end and the second power supply signal end with the display driving circuit in response to a signal of the enable signal end. Through mutual cooperation of the touch driving circuit, the display driving circuit and the switching circuit, power consumption can be saved, and energy waste is avoided.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a display module, a display device and a driving method. Background Art

[0002] With the continuous development of display technology, touch display devices have been widely used. Usually, the touch function and display function in a touch display device are independently controlled by two chips. In order to improve the integration of touch display devices, touch and display driver integration (TDDI) chips have emerged. The touch and display driver integrated chip is a new type of chip that integrates independent display driver chips (Display Driver Integrated Circuit, DDIC) and touch panel integrated circuits (TPIC) into a single chip. At present, the touch and display driver integrated chips in related technologies will generate more power consumption in actual applications, resulting in energy loss. Summary of the invention

[0003] The display module provided by the embodiment of the present disclosure includes:

[0004] A touch display driving circuit, comprising: a touch driving circuit and a display driving circuit; the touch driving circuit is electrically connected to a first power signal terminal and a second power signal terminal;

[0005] The switch circuit is electrically connected to the display driving circuit, the first power signal terminal and the second power signal terminal, and is configured to connect or disconnect the first power signal terminal and the second power signal terminal from the display driving circuit in response to a signal from an enable signal terminal.

[0006] In some possible implementations, the switch circuit includes: a first sub-switch circuit and a second sub-switch circuit;

[0007] The first sub-switch circuit is electrically connected to the first power signal terminal and the display driving circuit, and is configured to provide the signal of the first power signal terminal to the display driving circuit in response to the signal of the enable signal terminal;

[0008] The second sub-switch circuit is electrically connected to the second power signal terminal and the display driving circuit, and is configured to provide the signal of the second power signal terminal to the display driving circuit in response to the signal of the enable signal terminal.

[0009] In some possible implementations, the first switch circuit includes: a first switch transistor;

[0010] The gate of the first switch transistor is electrically connected to the enable signal terminal, the first electrode of the first switch transistor is electrically connected to the first power signal terminal, and the second electrode of the first switch transistor is electrically connected to the display driving circuit.

[0011] In some possible implementations, the second switch circuit includes: a second switch transistor;

[0012] The gate of the second switch transistor is electrically connected to the enable signal terminal, the first electrode of the second switch transistor is electrically connected to the second power signal terminal, and the second electrode of the second switch transistor is electrically connected to the display driving circuit.

[0013] In some possible implementations, the touch display driving circuit includes: a clock generating circuit, which is electrically connected to the touch driving circuit and the display driving circuit and is configured to output a clock signal to the touch driving circuit and the display driving circuit.

[0014] In some possible implementations, the clock generating circuit includes: a first clock generating circuit and a second clock generating circuit; the clock signal includes: a first clock signal and a second clock signal;

[0015] The first clock generating circuit is electrically connected to the touch driving circuit, and is configured to output the first clock signal to the touch driving circuit;

[0016] The second clock generating circuit is electrically connected to the display driving circuit, and is configured to output the second clock signal to the display driving circuit.

[0017] In some possible implementations, the first clock generating circuit and / or the second clock generating circuit includes an oscillator.

[0018] In some possible implementations, the first clock signal and the second clock signal have different phases.

[0019] In some possible implementations, a phase difference between a phase of the first clock signal and a phase of the second clock signal is constant.

[0020] In some possible implementations, the further comprising: a power management circuit, the power management circuit being electrically connected to the first power signal terminal and the second power signal terminal and configured to provide a signal to the first power signal terminal and the second power signal terminal;

[0021] Wherein, it also includes: a first circuit board, the first circuit board includes a plurality of signal lines, and the power management circuit is electrically connected to the touch display driving circuit through the signal lines.

[0022] In some possible implementations, the power management circuit includes: a first power circuit and a second power circuit;

[0023] The first power supply circuit is electrically connected to the first power signal terminal and is configured to provide a signal to the first power signal terminal;

[0024] The second power supply circuit is electrically connected to the second power supply signal terminal, and is configured to provide a signal to the second power supply signal terminal.

[0025] In some possible implementations, the switch circuit is disposed in the touch display driving circuit.

[0026] In some possible implementations, the switch circuit is disposed in the power management circuit.

[0027] The display device provided by the embodiment of the present disclosure includes the above-mentioned display module.

[0028] The driving method of the display module provided by the embodiment of the present disclosure includes: the display module has a screen-off mode and a screen-on mode;

[0029] The touch display driving circuit responds to the screen-off mode, causing the switch circuit to respond to a signal at the enable signal terminal to disconnect the first power signal terminal and the second power signal terminal from the display driving circuit;

[0030] The touch display driving circuit responds to the screen-on mode, causing the switch circuit to respond to the signal at the enable signal terminal, and connects the first power signal terminal and the second power signal terminal to the display driving circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of a touch display driving circuit structure of a related technology;

[0032] Figure 2 Some structural schematic diagrams of display modules provided by embodiments of the present disclosure;

[0033] Figure 3 Some other structural schematic diagrams of display modules provided by embodiments of the present disclosure;

[0034] Figure 4 Some further structural schematic diagrams of display modules provided by embodiments of the present disclosure;

[0035] Figure 5 Some further structural schematic diagrams of display modules provided by embodiments of the present disclosure;

[0036] Figure 6 Some further structural schematic diagrams of display modules provided by embodiments of the present disclosure;

[0037] Figure 7 A schematic diagram of a first clock signal and a second clock signal provided in an embodiment of the present disclosure;

[0038] Figure 8 Some further structural schematic diagrams of display modules provided by embodiments of the present disclosure;

[0039] Fig. 9 Some further structural schematic diagrams of display modules provided by embodiments of the present disclosure;

[0040] Fig.10 Some further structural schematic diagrams of display modules provided by embodiments of the present disclosure;

[0041] Fig.11 Some further structural schematic diagrams of display modules provided by embodiments of the present disclosure;

[0042] Fig.12 A schematic diagram of signals loaded on a display panel provided in an embodiment of the present disclosure;

[0043] Fig.13 Some further structural schematic diagrams of display modules provided by embodiments of the present disclosure;

[0044] Fig.14 Some further structural schematic diagrams of display modules provided by embodiments of the present disclosure;

[0045] Fig.15 A flowchart of a method for driving a display module provided by an embodiment of the present disclosure;

[0046] Fig.16 Some signal timing diagrams provided for embodiments of the present disclosure;

[0047] Fig.17 Some other signal timing diagrams provided for the embodiments of the present disclosure. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. And in the absence of conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present disclosure.

[0049] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. "First", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0050] It should be noted that the sizes and shapes of the figures in the accompanying drawings do not reflect the actual proportions, and are only intended to illustrate the present disclosure. The same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions.

[0051] Using a touch control and display driver integrated chip in a display device can reduce the number of components, thereby reducing costs, and can further reduce the appearance of the circuit board in the display device, thereby reducing the space occupied by the circuit board and improving space utilization.

[0052] In related technologies, such as Figure 1 As shown, the display driving circuit 102 in the touch display driving circuit 10 generally requires four power supplies, and the display driving circuit 102 is electrically connected to the first power signal terminal AVDD, the second power signal terminal VDDI, the third power signal terminal VCI, and the fourth power signal terminal DVDD respectively; and the touch driving circuit 101 in the touch display driving circuit 10 is electrically connected to the first power signal terminal AVDD and the second power signal terminal VDDI respectively, that is, the touch driving circuit 101 and the display driving circuit 102 share the first power signal terminal AVDD and the second power signal terminal VDDI. In addition, the touch driving circuit 101 and the display driving circuit 102 are both electrically connected to the clock generating circuit 103, that is, the touch driving circuit 101 and the display driving circuit 102 share the clock generating circuit 103.

[0053] For example, when the display panel in the display device needs to be in the screen-off mode, the touch driving circuit will detect at a lower frequency. Since the touch driving circuit and the display driving circuit share the first power signal terminal, the second power signal terminal and the clock generating circuit, the display driving circuit cannot be in a completely off state, that is, the display driving circuit will generate power consumption, resulting in a lot of energy loss.

[0054] Based on the above problems, the display module provided by the present disclosure is as follows: Figure 2As shown, it includes: a touch display driving circuit 10, wherein the touch display driving circuit 10 specifically includes: a touch driving circuit 101 and a display driving circuit 102; the touch driving circuit 101 is configured to drive the touch function of the display module; the display driving circuit 102 is configured to drive the display function of the display module;

[0055] The touch driving circuit 101 is electrically connected to the first power signal terminal AVDD and the second power signal terminal VDDI;

[0056] The switch circuit 20 is electrically connected to the display driver circuit 102, the first power signal terminal AVDD and the second power signal terminal VDDI, and is configured to connect or disconnect the first power signal terminal AVDD and the second power signal terminal VDDI with the display driver circuit 102 in response to the signal of the enable signal terminal EN.

[0057] It should be noted that if Figure 2 As shown, the enable signal terminal EN is electrically connected to the touch display driving circuit 10, and the touch display driving circuit 10 is used to provide a signal of the enable signal terminal EN, so as to realize the linkage between the touch display driving circuit and the switch circuit. For example, when only the touch driving circuit in the touch display driving circuit is required to work, the touch display driving circuit provides a shutdown signal to the enable signal terminal, and the switch circuit responds to the shutdown signal of the enable signal terminal, controls the first power signal terminal and the second power signal terminal to be disconnected from the display driving circuit, that is, no power is supplied to the display driving circuit, and the display driving circuit stops working, while the touch driving circuit is normally powered, and the touch driving circuit works normally. When the touch driving circuit and the display driving circuit in the touch display driving circuit are required to work together, the touch display driving circuit provides a conduction signal to the enable signal terminal, and the switch circuit responds to the conduction signal of the enable signal terminal, controls the first power signal terminal and the second power signal terminal to be turned on with the display driving circuit, that is, the display driving circuit and the touch driving circuit work normally.

[0058] In the disclosed embodiment, through the cooperation of the touch driving circuit, the display driving circuit and the switching circuit, when the display module is in the screen-off mode, the touch driving circuit can be electrically connected to the first power signal terminal and the second power signal terminal to operate normally. At the same time, the switching circuit controls the display driving circuit to be disconnected from the first power signal terminal and the second power signal terminal, so as to avoid the first power signal terminal or the second power signal terminal supplying power to the display driving circuit due to the display driving circuit being unable to completely stop working, thereby saving power consumption and avoiding energy waste.

[0059] In some embodiments of the present disclosure, Figure 3As shown, the switch circuit 20 includes: a first sub-switch circuit 201 and a second sub-switch circuit 202; wherein the first sub-switch circuit 201 is electrically connected to the first power signal terminal AVDD and the display driver circuit 102, and is configured to respond to the signal of the enable signal terminal EN and provide the signal of the first power signal terminal AVDD to the display driver circuit 102; the second sub-switch circuit 202 is electrically connected to the second power signal terminal VDDI and the display driver circuit 102, and is configured to respond to the signal of the enable signal terminal EN and provide the signal of the second power signal terminal VDDI to the display driver circuit 102.

[0060] In some embodiments of the present disclosure, Figure 4 As shown, the first switch circuit 201 includes: a first switch transistor T1; wherein the gate of the first switch transistor T1 is electrically connected to the enable signal terminal EN, the first electrode of the first switch transistor T1 is electrically connected to the first power signal terminal AVDD, and the second electrode of the first switch transistor T1 is electrically connected to the display driving circuit 102.

[0061] Exemplarily, the first switch transistor T1 can be turned on under the control of the effective level of the enable signal transmitted on the enable signal terminal EN, and can be turned off under the control of the ineffective level of the enable signal. For example, the first switch transistor T1 can be set as an N-type transistor, then the effective level of the enable signal is a high level, and the ineffective level of the enable signal is a low level. Alternatively, the first switch transistor T1 can be set as a P-type transistor, then the effective level of the enable signal is a low level, and the ineffective level of the enable signal is a high level.

[0062] In some embodiments of the present disclosure, Figure 4 As shown, the second switch circuit 202 includes: a second switch transistor T2; wherein the gate of the second switch transistor T2 is electrically connected to the enable signal terminal EN, the first electrode of the second switch transistor T2 is electrically connected to the second power signal terminal VDDI, and the second electrode of the second switch transistor T2 is electrically connected to the display driving circuit 102.

[0063] Exemplarily, the second switch transistor T2 can be turned on under the control of the effective level of the enable signal transmitted on the enable signal terminal EN, and can be turned off under the control of the invalid level of the enable signal. For example, the second switch transistor T2 can be set as an N-type transistor, then the effective level of the enable signal is a high level, and the invalid level of the enable signal is a low level. Alternatively, the second switch transistor T2 can be set as a P-type transistor, then the effective level of the enable signal is a low level, and the invalid level of the enable signal is a high level.

[0064] In some embodiments of the present disclosure, Figure 5As shown, the touch display driving circuit 10 includes: a clock generating circuit 103 , which is electrically connected to the touch driving circuit 101 and the display driving circuit 102 , and is configured to output a clock signal to the touch driving circuit 101 and the display driving circuit 102 .

[0065] In some embodiments of the present disclosure, Figure 6 As shown, the clock generating circuit 103 includes: a first clock generating circuit 1031 and a second clock generating circuit 1032; the clock signal includes: a first clock signal and a second clock signal; wherein, the first clock generating circuit 1031 is electrically connected to the touch driving circuit 101, and is configured to output the first clock signal to the touch driving circuit 101; the second clock generating circuit 1032 is electrically connected to the display driving circuit 102, and is configured to output the second clock signal to the display driving circuit 102.

[0066] The disclosed embodiments can adjust the first clock generating circuit and the second clock generating circuit respectively according to the requirements of the clock signals required by the touch driving circuit and the display driving circuit, thereby further saving power consumption and avoiding energy loss.

[0067] In some embodiments of the present disclosure, the first clock generating circuit and / or the second clock generating circuit includes an oscillator.

[0068] Exemplarily, an oscillator can generate a stable clock signal, and the oscillator includes a crystal oscillator, a resistor-capacitor oscillator (RC oscillator), an inductor-capacitor oscillator (LC oscillator), a tuning fork oscillator, and an integrated circuit oscillator. Among them, a crystal oscillator is usually used in electronic devices to generate a stable clock signal. A crystal oscillator contains a crystal inside, and a high-frequency oscillation is generated by applying a voltage to the crystal. A crystal oscillator is a clock source with high precision and is often used in applications that require a high-precision clock. An RC oscillator uses an oscillation circuit composed of resistors and capacitors to generate a frequency signal. An RC oscillator is relatively simple and economical, but its accuracy is lower than that of a crystal oscillator. An LC oscillator uses an inductor and a capacitor to generate an oscillation signal.

[0069] Exemplarily, the first clock generating circuit and the second clock generating circuit may further include: a counter, a frequency divider and a phase-locked loop, wherein the counter and the frequency divider are used to further process and frequency-divide the clock signal generated by the oscillator to obtain a clock signal with a more accurate clock frequency. A phase-locked loop is a circuit capable of generating a stable clock signal, which synchronizes the input signal with the clock signal output by the local oscillator through feedback control, thereby providing a clock signal with controllable frequency and phase.

[0070] In some embodiments of the present disclosure, the first clock signal and the second clock signal have different phases.

[0071] The embodiment of the present disclosure makes the phases of the first clock signal generated by the first clock generating circuit and the second clock signal generated by the second clock generating circuit different, thereby avoiding mutual interference between the first clock signal and the second clock signal and eliminating possible signal interference that affects signal transmission.

[0072] In some embodiments of the present disclosure, a phase difference between a phase of the first clock signal and a phase of the second clock signal is constant.

[0073] For example, Figure 7 As shown, the phase difference between the first clock signal Clock1 generated by the first clock generating circuit and the second clock signal Clock2 generated by the second clock generating circuit is constant, and the phase difference is φ, that is, by comparing the phases of the first clock signal and the second clock signal at a preset time, it is ensured that the phase difference between the first clock signal and the second clock signal is constant. If the phase difference between the first clock signal and the second clock signal is large, it is necessary to adjust the first clock generating circuit and the second clock generating circuit to control the first clock signal and the second clock signal not to affect each other and generate interference.

[0074] In some embodiments of the present disclosure, Figure 8 As shown, it also includes: a power management circuit 200, which is electrically connected to the first power signal terminal AVDD and the second power signal terminal VDDI and is configured to provide signals to the first power signal terminal AVDD and the second power signal terminal VDDI.

[0075] In some embodiments of the present disclosure, Fig. 9 As shown, it also includes: a display panel 100 for displaying images; a first circuit board 300, the first circuit board 300 includes a plurality of signal lines 310, and the power management circuit 200 is electrically connected to the touch display driving circuit 10 through the signal lines 310.

[0076] Exemplarily, the signal line 310 may include: an integrated circuit bus (Inter-Integrated Circuit, I 2 C), the integrated circuit bus generally includes two signal lines, one is the bidirectional data line SDA, and the other is the clock line SCL.

[0077] For example, Fig. 9 As shown, the display panel 100 includes a display area and a non-display area, wherein the touch display driving circuit 10 is disposed in the non-display area of ​​the display panel 100; the first circuit board 300 may be a flexible printed circuit (FPC).

[0078] Among them, the display area of ​​the display panel 100 includes a plurality of pixel units arranged in an array. Exemplarily, each pixel unit includes a plurality of sub-pixels. For example, the pixel unit may include a red sub-pixel, a green sub-pixel and a blue sub-pixel, so that red, green and blue can be mixed to achieve color display. Alternatively, the pixel unit may also include a red sub-pixel, a green sub-pixel, a blue sub-pixel and a white sub-pixel, so that red, green, blue and white can be mixed to achieve color display. Of course, in actual applications, the luminous color of the sub-pixels in the pixel unit can be designed and determined according to the actual application environment, and is not limited here.

[0079] In the embodiments of the present disclosure, Fig.10 As shown, each sub-pixel includes a pixel circuit 110 and a light-emitting device L, and the pixel circuit 110 is used to drive the light-emitting device to emit light, so that the display panel can realize the function of displaying a picture. Among them, the pixel circuit 110 may include: a driving transistor M0, a data transistor M1 and a capacitor C; the gate of the driving transistor M0 is electrically connected to the first electrode of the data transistor M1, the first electrode of the driving transistor M0 is electrically connected to the first power supply voltage signal terminal ELVDD, and the first electrode of the driving transistor M0 is electrically connected to the anode of the light-emitting device L; the gate of the data transistor M1 is electrically connected to the gate scan signal terminal GA, and the second electrode of the data transistor M1 is electrically connected to the user data signal terminal DA; the first electrode of the capacitor C is electrically connected to the first electrode of the driving transistor M0, and the second electrode of the capacitor C is electrically connected to the gate of the driving transistor M0; the cathode of the light-emitting device L is electrically connected to the second power supply voltage signal terminal ELVSS.

[0080] The first power supply voltage signal terminal ELVDD and the second power supply voltage signal terminal ELVSS are electrically connected to the power supply management circuit 200 , and the power supply management circuit 200 is used to load signals to the first power supply voltage signal terminal ELVDD and the second power supply voltage signal terminal ELVSS.

[0081] Exemplarily, the light-emitting device L may include: at least one of a micro light-emitting diode (Micro Light Emitting Diode, Micro LED), an organic light-emitting diode (Organic Light Emitting Diode, OLED) and a quantum dot light-emitting diode (Quantum Dot Light Emitting Diodes, QLED). Exemplarily, the light-emitting device L may include a stacked anode, a light-emitting layer, and a cathode. Furthermore, the light-emitting layer may also include film layers such as a hole injection layer, a hole transport layer, an electron transport layer, and an electron injection layer. In practical applications, the specific structure of the light-emitting device can be designed and determined according to the actual application environment, which is not limited here.

[0082] In some embodiments of the present disclosure, Fig.11 As shown, the power management circuit 200 includes: a first power circuit 210 and a second power circuit 220; wherein the first power circuit 210 is electrically connected to the first power signal terminal AVDD and is configured to provide a signal to the first power signal terminal AVDD; the second power circuit 220 is electrically connected to the second power signal terminal VDDI and is configured to provide a signal to the second power signal terminal VDDI.

[0083] It should be noted that the display panel has multiple film layers, the touch drive circuit loads a signal to the first film layer of the display panel, and the second power supply voltage signal end loads a signal to the second film layer of the display panel, wherein the first film layer and the second film layer are adjacent to each other, so when the display panel displays different pictures, there are differences in the load, which causes fluctuations in the signal loaded by the second power supply voltage signal end to the second film layer, which may further affect the signal loaded by the touch drive circuit to the first film layer.

[0084] For example, Fig.12 As shown, the touch driving circuit loads the signal touch-tx to the first film layer of the display panel, and the second power supply voltage signal terminal loads the signal elvss to the second film layer of the display panel. The embodiment of the present disclosure adjusts the first clock generating circuit, the touch driving circuit and the power management circuit so that the peak value of the signal elvss is located at the low level of the signal touch-tx. This setting avoids interference between the signal on the first film layer and the signal on the second film layer, and further avoids mutual influence between the signals, thereby ensuring the display effect and improving the display quality.

[0085] In some embodiments of the present disclosure, Fig.13 As shown, the switch circuit 20 is disposed in the touch display driving circuit 10 .

[0086] Exemplarily, when the switch circuit is disposed in the touch display driving circuit, the first power circuit and the second power circuit are respectively disposed in different areas of the power management circuit.

[0087] In some embodiments of the present disclosure, Fig.14 As shown, the switch circuit 20 is disposed in the power management circuit 200 .

[0088] Exemplarily, when the switch circuit 20 is disposed in the power management circuit 200 , the first power circuit and the second power circuit are disposed in the same area of ​​the power management circuit.

[0089] The embodiment of the present disclosure also provides a method for driving a display module, wherein the display module has a screen-off mode and a screen-on mode;

[0090] like Fig.15 As shown, the specific steps include:

[0091] S100, the touch display driving circuit responds to the screen-off mode, causing the switch circuit to respond to the signal at the enable signal terminal to disconnect the first power signal terminal and the second power signal terminal from the display driving circuit;

[0092] S200: The touch display driving circuit responds to the screen-on mode, causing the switch circuit to respond to the signal at the enable signal terminal, and connects the first power signal terminal and the second power signal terminal to the display driving circuit.

[0093] Below Fig.14 Take the display module shown as an example, combined with Fig.16 The signal timing diagram shown describes the working process of the display module provided by the embodiment of the present disclosure.

[0094] like Fig.16 As shown, vddi represents the signal of the second power signal terminal VDDI, nRESET represents the signal loaded into the touch display driving circuit, MIPI represents the signal loaded into the touch display driving circuit, en represents the signal of the enable signal terminal EN, I2C represents the signal transmitted on the signal line, avdd represents the signal of the first power signal terminal AVDD, elvdd represents the signal of the first power voltage signal terminal ELVDD, and elvss represents the signal of the second power voltage signal terminal ELVSS;

[0095] When the display module needs to switch to the screen-off mode, within the first time period H, the touch display driving circuit 10 will respond to the screen-off mode, and the touch display driving circuit 10 will transmit the first instruction signal EL_OFF, the second instruction signal VDDI_OFF, and the third instruction signal AVDD_OFF to the power management circuit 200 through the signal line in sequence; when the first instruction signal EL_OFF is output, the first instruction signal EL_OFF causes the power management circuit 200 to stop providing signals to the first power supply voltage signal terminal ELVDD and the second power supply voltage signal terminal ELVSS; when the second instruction signal VDDI_OFF is output, the second instruction signal VDDI_OFF causes the power management circuit 200 to stop providing signals to the first power supply voltage signal terminal ELVDD and the second power supply voltage signal terminal ELVSS. Stop providing a signal to the second power signal terminal VDDI, then the signal vddi of the second power signal terminal VDDI is at a low level; when the third instruction signal AVDD_OFF is output, the third instruction signal AVDD_OFF causes the power management circuit 200 to stop providing a signal to the first power signal terminal AVDD, then the signal avdd of the first power signal terminal AVDD is at a low level; after outputting the first instruction signal EL_OFF, the second instruction signal VDDI_OFF, and the third instruction signal AVDD_OFF, the touch display driving circuit 10 controls the signal en of the enable signal terminal EN to be low level, then the first switch transistor T1 and the second switch transistor T2 in the switch circuit 20 When the touch display driving circuit 102 is turned off under the control of the low level of the signal en, the first power signal terminal AVDD and the second power signal terminal VDDI are disconnected from the display driving circuit 102; the display panel no longer displays the picture and is in the off-screen state. However, when the display panel is in the off-screen state, the touch function also needs to be realized. The touch display driving circuit 10 transmits the third instruction signal AVDD_EN and the fourth instruction signal VDDI_EN to the power management circuit 200 in sequence through the signal line; when the third instruction signal AVDD_EN is output, the third instruction signal AVDD_EN enables the power management circuit 200 to provide a signal to the first power signal terminal AVDD, and the signal avdd of the first power signal terminal AVDD is in a high voltage state. When the fourth instruction signal VDDI_EN is output, the fourth instruction signal VDDI_EN enables the power management circuit 200 to provide a signal to the second power signal terminal VDDI, and the signal vddi of the second power signal terminal VDDI is at a high level; the touch driving circuit 101 works normally, so that the display panel realizes the touch function. At this time, the signal en of the enable signal terminal EN is at a low level, and the first switch transistor T1 and the second switch transistor T2 in the switch circuit 20 are turned off under the control of the low level of the signal en, and the first power signal terminal AVDD and the second power signal terminal VDDI are disconnected from the display driving circuit, and the display driving circuit 102 will not generate power consumption, resulting in energy loss.

[0096] Below Fig.14Taking the display module shown as an example, combined with Fig.17 The signal timing diagram shown describes the working process of the display module provided by the embodiment of the present disclosure.

[0097] like Fig.17 As shown, vddi represents the signal of the second power signal terminal VDDI, nRESET represents the signal loaded into the touch display driving circuit, MIPI represents the signal loaded into the touch display driving circuit, vci represents the signal of the third power signal terminal VCI, I2C represents the signal transmitted on the signal line, en represents the signal of the enable signal terminal EN, dvdd represents the signal of the fourth power signal terminal DVDD, avdd represents the signal of the first power signal terminal AVDD, elvdd represents the signal of the first power voltage signal terminal ELVDD, and elvss represents the signal of the second power voltage signal terminal ELVSS.

[0098] When the display module needs to be in the bright screen mode, the touch display driving circuit 10 will respond to the bright screen mode, and the touch display driving circuit 10 controls the signal en of the enable signal terminal EN to be high, then the first switch transistor T1 and the second switch transistor T2 in the switch circuit 20 are turned on under the control of the high level of the signal en, and the first power signal terminal AVDD and the second power signal terminal VDDI are turned on with the display driving circuit 102; the touch display driving circuit 10 transmits the third instruction signal AVDD_EN and the fifth instruction signal EL_EN to the power management circuit 200 in sequence through the signal line; when the third instruction signal AVDD_EN is output, the third instruction signal AVDD_EN enables the power management circuit 200 to provide a signal to the first power signal terminal AVDD, and the signal avdd of the first power signal terminal AVDD is at a high level; when the fifth instruction signal EL_EN is output, the fifth instruction signal EL_EN enables the power management circuit 200 to provide a signal to the first power voltage signal terminal ELVDD and the second power voltage signal terminal ELVSS, and the display panel displays the picture and is in the bright screen state.

[0099] Based on the same inventive concept, the embodiment of the present disclosure also provides a display device, including the above display module provided by the embodiment of the present disclosure. The principle of solving the problem by the display device is similar to that of the above display module, so the implementation of the display device can refer to the implementation of the above display module, and the repeated parts will not be repeated here.

[0100] In specific implementation, in the embodiments of the present disclosure, the display device may be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, etc. Other essential components of the display device are well understood by those skilled in the art, and are not described in detail here, nor should they be used as limitations to the present disclosure.

[0101] Although the preferred embodiments of the present disclosure have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present disclosure.

[0102] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present disclosure without departing from the spirit and scope of the embodiments of the present disclosure. Thus, if these modifications and variations of the embodiments of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is also intended to include these modifications and variations.

Claims

1. A display module, wherein: include: A touch display driving circuit, comprising: a touch driving circuit and a display driving circuit; the touch driving circuit is electrically connected to a first power signal terminal and a second power signal terminal; The switch circuit is electrically connected to the display driving circuit, the first power signal terminal and the second power signal terminal, and is configured to connect or disconnect the first power signal terminal and the second power signal terminal from the display driving circuit in response to a signal from an enable signal terminal.

2. The display module according to claim 1, wherein: The switch circuit comprises: a first sub-switch circuit and a second sub-switch circuit; The first sub-switch circuit is electrically connected to the first power signal terminal and the display driving circuit, and is configured to provide the signal of the first power signal terminal to the display driving circuit in response to the signal of the enable signal terminal; The second sub-switch circuit is electrically connected to the second power signal terminal and the display driving circuit, and is configured to provide the signal of the second power signal terminal to the display driving circuit in response to the signal of the enable signal terminal.

3. The display module according to claim 2, wherein: The first switch circuit comprises: a first switch transistor; The gate of the first switch transistor is electrically connected to the enable signal terminal, the first electrode of the first switch transistor is electrically connected to the first power signal terminal, and the second electrode of the first switch transistor is electrically connected to the display driving circuit.

4. The display module according to claim 2, wherein: The second switch circuit includes: a second switch transistor; The gate of the second switch transistor is electrically connected to the enable signal terminal, the first electrode of the second switch transistor is electrically connected to the second power signal terminal, and the second electrode of the second switch transistor is electrically connected to the display driving circuit.

5. The display module according to claim 1, wherein: The touch display driving circuit includes: a clock generating circuit electrically connected to the touch driving circuit and the display driving circuit, and configured to output a clock signal to the touch driving circuit and the display driving circuit.

6. The display module according to claim 5, wherein: The clock generating circuit includes: a first clock generating circuit and a second clock generating circuit; the clock signal includes: a first clock signal and a second clock signal; The first clock generating circuit is electrically connected to the touch driving circuit, and is configured to output the first clock signal to the touch driving circuit; The second clock generating circuit is electrically connected to the display driving circuit, and is configured to output the second clock signal to the display driving circuit.

7. The display module according to claim 6, wherein: The first clock generating circuit and / or the second clock generating circuit comprises an oscillator.

8. The display module according to claim 6, wherein: The first clock signal and the second clock signal have different phases.

9. The display module according to claim 8, wherein: A phase difference between a phase of the first clock signal and a phase of the second clock signal is constant.

10. The display module according to any one of claims 1 to 9, wherein: Also includes: a power management circuit, the power management circuit being electrically connected to the first power signal terminal and the second power signal terminal and configured to provide a signal to the first power signal terminal and the second power signal terminal; Wherein, it also includes: a first circuit board, the first circuit board includes a plurality of signal lines, and the power management circuit is electrically connected to the touch display driving circuit through the signal lines.

11. The display module according to claim 10, wherein: The power management circuit comprises: a first power circuit and a second power circuit; The first power supply circuit is electrically connected to the first power signal terminal and is configured to provide a signal to the first power signal terminal; The second power supply circuit is electrically connected to the second power supply signal terminal, and is configured to provide a signal to the second power supply signal terminal.

12. The display module according to claim 10, wherein: The switch circuit is arranged in the touch display driving circuit.

13. The display module according to claim 10, wherein: The switch circuit is arranged in the power management circuit.

14. A display device, wherein: Comprising a display module as described in any one of claims 1-13.

15. A method for driving a display module according to any one of claims 1 to 13, wherein: include: The display module has a screen-off mode and a screen-on mode; The touch display driving circuit responds to the screen-off mode, causing the switch circuit to respond to the signal at the enable signal terminal to disconnect the first power signal terminal and the second power signal terminal from the display driving circuit; The touch display driving circuit responds to the screen-on mode, causing the switch circuit to respond to the signal at the enable signal terminal, and connects the first power signal terminal and the second power signal terminal to the display driving circuit.

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