Light field driving module and 2D / 3D switchable display device

Abstract

The utility model discloses a light field driving module and 2D / 3D switchable display equipment, comprising a control circuit which comprises an instruction input end and a signal output end and is used for controlling a level signal output by the signal output end according to an instruction for switching 2D / 3D display received by the instruction input end; the switching circuit comprises an enabling input end connected with the signal output end of the control circuit, a first voltage input end connected with a voltage source, and a first voltage output end, and is used for controlling the conduction of the first voltage output end and the first voltage input end according to the level signal so as to control the first voltage output end to output corresponding voltage; and the driving voltage generation circuit comprises a second voltage input end connected with the first voltage output end and a driving voltage output end connected with the driving electrode, and is used for receiving the voltage output by the switching circuit, generating the driving voltage and outputting the driving voltage to the driving electrode of the display equipment. According to the utility model, the driving voltage generation circuit can be powered off, and the safety is improved.

Description

Technical Field

[0001] The utility model relates to the field of display technology, and in particular to a light field driving module and a 2D / 3D switchable display device. Background Art

[0002] The main way to achieve naked-eye 3D display technology is to add a grating structure in front of the display panel, so that the picture pixels form odd-numbered columns of pixels and even-numbered columns of pixels after passing through the grating structure. In this way, a picture is provided to the observer's left and right eyes respectively, and the parallax effect of the observer's left and right eyes is used to produce depth of field, allowing the observer to feel the 3D display effect.

[0003] The grating structure can be a liquid crystal lens or a liquid crystal grating, etc. By changing the light field state of the grating structure, the display device can display a 3D image or a 2D image, thereby realizing 2D / 3D display switching. Changing the light field state of the grating structure is mainly accomplished by applying a driving voltage to the driving electrodes of the grating structure.

[0004] In the prior art, the patent application number is 2018109724613, and the patent name is a driving circuit, a driving method, and a two-dimensional / three-dimensional switchable display device. A driving circuit for changing the light field state of a grating structure is provided, which is connected in parallel with a driving voltage generating circuit. After receiving the switching instruction logic signal output by the control circuit, the switching circuit turns on EN2 and N2 to achieve grounding, so that the driving voltage generating circuit is connected to the driving electrode, thereby completing the 2D / 3D display switching; on the contrary, the switching circuit turns on EN2 and N1 to achieve a short circuit, thereby cutting off the connection between the driving voltage generating circuit and the driving electrode. However, in this scheme, the switching circuit is connected in parallel with the driving voltage generating circuit. Even if the switching circuit turns on EN2 and N1 to achieve a short circuit, the driving voltage generating circuit still keeps working, and there will be current in it, which will cause a significant increase in power consumption. At the same time, if there is a fault in the switching circuit, it will also cause the driving voltage generating circuit to accidentally connect to the driving electrode, thereby causing an unexpected switch of the 2D / 3D display. Summary of the invention

[0005] Purpose of the invention: In view of the above-mentioned shortcomings, the utility model provides a light field driving module and a 2D / 3D switchable display device, which can cut off the power supply to the driving voltage generating circuit, improve safety, and significantly reduce power consumption.

[0006] Technical solution:

[0007] The utility model provides a light field driving module, comprising:

[0008] A control circuit, comprising an instruction input terminal and a signal output terminal, for controlling a level signal outputted by the signal output terminal according to an instruction for switching 2D / 3D display received by the instruction input terminal;

[0009] The switch circuit comprises an enable input terminal connected to the signal output terminal of the control circuit, a first voltage input terminal connected to a voltage source, and a first voltage output terminal, and is used to control whether the first voltage output terminal is connected to the first voltage input terminal according to the level signal, thereby controlling the first voltage output terminal to output a corresponding voltage;

[0010] The driving voltage generating circuit includes a second voltage input terminal connected to the first voltage output terminal of the switching circuit and a driving voltage output terminal connected to the driving electrode of the display device, and is used to receive the voltage output by the switching circuit, generate a driving voltage, and output it to the driving electrode of the display device.

[0011] Specifically, the level signal output by the control signal output terminal is: the level signal corresponding to switching 2D / 3D display is set to a high level, otherwise it is set to a low level, and the switch circuit controls the first voltage output terminal and the first voltage input terminal to be connected or not accordingly, thereby controlling the first voltage output terminal to output a corresponding voltage.

[0012] Specifically, the control circuit includes a data interface expansion circuit and a single-chip microcomputer circuit connected in sequence;

[0013] The data interface expansion circuit includes a first upstream end and at least one downstream end, the first upstream end is a command input end of the data interface expansion circuit, and its downstream end is connected to the single-chip circuit, and sends the instruction of switching 2D / 3D display received by the first upstream end to the single-chip circuit;

[0014] The single chip circuit includes a second upstream terminal and a signal output terminal, the second upstream terminal is connected to a downstream terminal of the data interface expansion circuit, and the signal output terminal is connected to an enable input terminal of the switch circuit;

[0015] The single chip circuit is used for switching 2D / 3D display according to whether or not the instruction received by the second uplink end is switched, and outputting a corresponding high / low level signal through the signal output end.

[0016] More specifically, the single chip microcomputer circuit further includes a bidirectional data port;

[0017] The single-chip circuit converts the signal received by the second uplink end into a signal of a corresponding protocol and sends it to an external device through the bidirectional data port;

[0018] Alternatively, the single-chip microcomputer circuit receives a data parameter signal sent by an external device through the bidirectional data port, converts the data parameter signal into a signal of a corresponding protocol, and outputs the signal to the data interface expansion circuit through the second upstream end.

[0019] More specifically, the number of the downstream ends is four, and the downstream ends are connected to external devices for inputting or outputting corresponding signals.

[0020] More specifically, the data interface expansion circuit adopts a USB-HUB circuit, including a first USB upstream end and at least one USB downstream end, and the second upstream end of the single-chip microcomputer circuit is correspondingly designed as a second USB upstream end.

[0021] More specifically, the switch circuit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, a second capacitor, a triode, and a MOS tube;

[0022] Among them, one end of the first resistor is connected to the signal output end of the single-chip computer circuit, and the other end is respectively connected to the base of the transistor and one end of the fourth resistor R8, and the other end of the fourth resistor R8 is grounded; the collector of the transistor is respectively connected to one end of the second resistor and the third resistor, the first capacitor is connected in parallel between the base and the emitter of the transistor, and the emitter of the transistor is grounded; the other end of the second resistor is connected to the gate of the MOS tube, the other end of the third resistor is connected to the source of the MOS tube, and a node is led out as its first voltage input end, the second capacitor is connected in parallel between the gate and the source of the MOS tube, the drain of the MOS tube is grounded through an RC parallel circuit, and a node is led out between the drain of the MOS tube and the RC parallel circuit as its first voltage output end.

[0023] The utility model also provides a 2D / 3D switchable display device, comprising:

[0024] Display panel;

[0025] A driving electrode, connected to the display panel;

[0026] And, the driving module as mentioned above.

[0027] Beneficial effect: The utility model can cut off the power supply to the driving voltage generating circuit by placing the switch circuit in front, thereby improving safety and significantly reducing power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate one or more embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the description of one or more embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0029] Figure 1 This is a principle block diagram of the light field driving module of the utility model;

[0030] Figure 2 This is a circuit connection example diagram of the light field driving module of the utility model;

[0031] Figure 3 This is a sample diagram of the USB-HUB circuit;

[0032] Figure 4 This is a sample diagram of a single-chip microcomputer circuit;

[0033] Figure 5 is a diagram of a switching circuit example;

[0034] Figure 6 This is an example diagram of the waveforms of the voltage output by the clock circuit and the driving voltage in the present invention. DETAILED DESCRIPTION

[0035] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0036] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should have the common meanings understood by people with ordinary skills in the field to which the present invention belongs. "Include" or "comprising" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, but do not exclude other elements or objects.

[0037] Figure 1 This is a principle block diagram of the light field driving module of the utility model, refer to Figure 1 The light field driving module provided by the utility model includes a control circuit, a switch circuit and a driving voltage generating circuit which are connected in sequence, and the driving voltage generating circuit is connected to the electrode of the grating structure.

[0038] Specifically, the control circuit is used to receive an instruction for switching 2D / 3D display sent by a front-end device such as a host computer, and output a corresponding level signal according to the aforementioned signal. In the utility model, the level signal corresponding to switching 2D / 3D display is generally set to a high level, otherwise it is set to a low level; the switch circuit is connected to a voltage source, which is used to receive the level signal output by the control circuit, and control whether its output end is connected to the voltage source according to the level signal output by the control circuit, thereby controlling whether the voltage is output. Specifically, whether the output end is connected to the voltage source can be controlled according to the level of the level signal output by the control circuit; the driving voltage generating circuit is used to receive the voltage output by the switching circuit, and output the driving voltage to drive the electrode of the grating structure to change the light field state of the grating structure, thereby realizing 2D / 3D display switching; if the output voltage of the switching circuit is 0, that is, no voltage is output, the driving voltage generating circuit has no voltage input, so it does not output the driving voltage.

[0039] More specifically, see Figure 2 The control circuit includes an instruction input terminal USB0 and a signal output terminal Out5, the instruction input terminal USB0 is connected to a receiving front-end device such as a host computer, and is used to receive an instruction for switching 2D / 3D display sent by the front-end device such as the host computer, and the signal output terminal Out5 is used to output a corresponding level signal; the switch circuit includes an enable input terminal S1, a first voltage input terminal IN6 and a first voltage output terminal Out6, the enable input terminal S1 is connected to the signal output terminal Out5 of the control circuit, and is used to receive the level signal output by the control circuit; the first voltage input terminal IN6 is connected to the voltage source P1; the switch circuit controls whether its voltage output terminal Out6 is connected to the first voltage input terminal IN6 according to the level signal output by the control circuit, so as to output the corresponding voltage through the voltage output terminal Out6; the driving voltage generating circuit includes a second voltage input terminal IN7 and a driving voltage output terminal Out10, the second voltage input terminal IN7 is used to receive the voltage output by the switch circuit, and the driving voltage output terminal Out10 is used to output the driving voltage to the driving electrode of the display device, specifically the driving electrode of the grating structure.

[0040] Continue to refer to Figure 2 , the control circuit includes a data interface expansion circuit and a single-chip microcomputer circuit which are connected in sequence.

[0041] The data interface expansion circuit includes a first upstream end and at least one downstream end. The first upstream end is connected to a front-end device such as a host computer and is a command input end of the data interface expansion circuit, and is used to receive a 2D / 3D display switching command sent by a front-end device such as a host computer. The data interface expansion circuit sends the 2D / 3D display switching command to its downstream end, and its downstream end is connected to the single-chip microcomputer circuit and sends the 2D / 3D display switching command to the single-chip microcomputer circuit.

[0042] In the utility model, the data interface expansion circuit can adopt a USB-HUB circuit. Specifically, the USB-HUB circuit includes a first USB upstream end USB0 and at least one USB downstream end. The first USB upstream end USB0 is connected to a front-end device such as a host computer and is a command input end of the USB-HUB circuit, which is used to receive a 2D / 3D display switching instruction sent by a front-end device such as a host computer. The USB-HUB circuit sends the 2D / 3D display switching instruction to the USB downstream end. The USB downstream end is connected to the single-chip microcomputer circuit and sends the 2D / 3D display switching instruction to the single-chip microcomputer circuit.

[0043] In this embodiment, there are four USB downstream terminals, defined as USB1, USB2, USB3, and USB4, one of which is connected to the single-chip circuit, USB4 in this embodiment, and the other USB downstream terminals can be connected to external devices, and can be used to input or output corresponding signals, such as inputting signals corresponding to external devices or outputting instructions received by the first USB upstream terminal USB0 to external devices. In the utility model, the USB-HUB circuit can also send the signal received by its USB downstream terminal to the first USB upstream terminal USB0, and then transmit it to the front-end device such as the host computer through the first USB upstream terminal USB0 for viewing or processing.

[0044] Furthermore, among the four USB downstream ports, two of them can be designed as USB 3.0 ports, and the other two can be designed as USB 2.0 ports.

[0045] For example, the USB-HUB circuit of the present invention adopts the VL817-Q7 chip solution, such as Figure 3 As shown. Among them, the HSD0+, HSD0-, SSRX0+, SSRX0-, SSTX0+ and SSTX0- pins of the VL817-Q7 chip constitute the first USB upstream end USB0 of the USB-HUB circuit; the HSD1+, HSD1-, SSRX1+, SSRX1-, SSTX1+ and SSTX1- pins constitute the USB downstream end USB1 of the USB-HUB circuit, the HSD2+, HSD2-, SSRX2+, SSRX2-, SSTX2+ and SSTX2- pins constitute the USB downstream end USB2 of the USB-HUB circuit, the HSD3+ and HSD3- pins constitute the USB downstream end USB3 of the USB-HUB circuit, and the HSD4+ and HSD4- pins constitute the USB downstream end USB4 of the USB-HUB circuit.

[0046] Continue to refer to Figure 2The single-chip microcomputer circuit includes a second upstream end and a signal output end, the second upstream end is connected to a downstream end of the data interface expansion circuit to receive a 2D / 3D display switching instruction sent by the data interface expansion circuit; the signal output end is connected to an enable input end S1 of the switch circuit, and is used to output a high / low level signal set by the single-chip microcomputer circuit according to a signal of yes / no switching of the 2D / 3D display instruction; in the utility model, the single-chip microcomputer circuit also includes a bidirectional data transmission end, and the utility model specifically adopts the data end of the I2C protocol. The single-chip microcomputer circuit can convert the signal received by the second upstream end into a signal of the I2C protocol, and send it to an external device through the I2C end; or, the single-chip microcomputer circuit can receive a data parameter signal sent by an external device through the I2C end, convert it into a signal of the corresponding protocol, and output it to the data interface expansion circuit through the second upstream end.

[0047] In the utility model, the single-chip microcomputer circuit is designed according to the corresponding design of the aforementioned USB-HUB circuit, and therefore includes a second USB upstream terminal USB5 and a signal output terminal OUT5. The second USB upstream terminal USB5 is connected to a USB downstream terminal of the USB-HUB circuit to receive a 2D / 3D display switching instruction sent by the USB-HUB circuit; the signal output terminal OUT5 is connected to the enable input terminal S1 of the switch circuit, and is used to output a high / low level signal set by the single-chip microcomputer circuit according to the signal of yes / no switching of the 2D / 3D display instruction; similarly, the single-chip microcomputer circuit can convert the signal received by the second USB upstream terminal USB5 into a signal of the I2C protocol, and send it to an external device through the I2C terminal; or, the single-chip microcomputer circuit can receive a control signal sent by an external device through the I2C terminal, convert it into a USB protocol signal, and output it to the USB-HUB circuit through the second upstream terminal USB5.

[0048] For example, the single-chip microcomputer circuit of the present invention adopts the PIC18F14K50-I / SS chip solution, such as Figure 4 As shown. Among them, the UD+ and UD- pins of the PIC18F14K50-I / SS chip are respectively connected to the HSD4+ and HSD4- pins of the aforementioned VL817-Q7 chip to receive the signal of the 2D / 3D display switching instruction sent by the USB-HUB circuit; the SCLK pin and SDI pin of the PIC18F14K50-I / SS chip constitute the I2C end of the microcontroller circuit; the SDO pin and TX pin of the PIC18F14K50-I / SS chip constitute the signal output end Out5 of the microcontroller circuit.

[0049] Furthermore, in the present invention, the single-chip microcomputer circuit may also adopt the PIC18LF14K50-I / SS chip solution, and the pin terminal settings are consistent with the above.

[0050] Reference Figure 5, exemplarily, the switch circuit includes a first resistor R387, a second resistor R392, a third resistor R383, a fourth resistor R8, a fifth resistor R391, a first capacitor C50, a second capacitor C672, a third capacitor C628, a transistor Q17, and a MOS tube Q15; wherein, one end of the first resistor R387 is connected to the signal output terminal Out5 of the single-chip circuit, and the other end is respectively connected to the base of the transistor Q17 and one end of the fourth resistor R8, and the other end of the fourth resistor R8 is grounded; the utility model sets the first resistor R387 to limit the current in the path where the resistor is located, and can be used together with the fourth resistor R8 for voltage division to ensure that the voltage acting on the base of the transistor Q17 is within a preset range; and when there is a surge or interference at the signal output terminal OUT5, the first resistor R387 and the fourth resistor R8 cooperate to play a voltage division role, thereby reducing the voltage acting on the base of the transistor Q17 and avoiding misconduction of the transistor Q17. The collector of the transistor Q17 is connected to one end of the second resistor R392 and the third resistor R383 respectively, the first capacitor C50 is connected in parallel between the base and the emitter of the transistor Q17, and the emitter of the transistor Q17 is grounded. The utility model sets the first capacitor C50 for filtering to absorb interference signals, thereby avoiding misconduction of the transistor Q17; the other end of the second resistor R392 is connected to the gate of the MOS tube Q15, and the other end of the third resistor R383 is connected to the source of the MOS tube Q15, and a node is led out as the first voltage input terminal IN6. The utility model sets the second resistor R392 to limit the current in the path where the resistor is located for voltage division; the third resistor R383 is set to divide the voltage between the collector and the emitter of the transistor Q17, which can avoid excessive voltage between the two and damage to the transistor Q17. The second capacitor C672 is connected in parallel between the gate and source of the MOS tube Q15. The utility model sets the second capacitor C672 to delay the conduction time of Q15, thereby avoiding the interference of surges when the overall circuit of the light field driving module is just powered on, so as to avoid mis-conduction of the MOS tube Q15; the drain of the MOS tube Q15 is grounded through an RC parallel circuit, and a node is drawn between the drain of the MOS tube Q15 and the RC parallel circuit as the first voltage output terminal Out6. The utility model is grounded through the RC parallel circuit to prevent the voltage output from the first voltage output terminal Out6 from overshooting, so as to play a filtering role. In the utility model, the RC parallel circuit includes a third capacitor C628 and a fifth resistor R391 connected in parallel with each other.

[0051] In the utility model, the transistor Q17 adopts an NPN transistor, and the MOS transistor Q15 adopts a P-channel MOS transistor; when the level signal input to the signal output terminal Out5 of the single-chip circuit is high level, the transistor Q17 turns on its collector and emitter, so that the gate of the MOS transistor Q15 forms a path with the ground, the gate and the source of the MOS transistor Q15 have a negative voltage, the source and the drain of the MOS transistor Q15 are turned on, and then the first voltage input terminal IN6 and the voltage output terminal Out6 are turned on; and in the single-chip circuit When the level signal input to the signal output terminal Out5 is at a low level, the collector and emitter of the triode Q17 are not turned on, the gate and source of the MOS tube Q15 and the second resistor R392 and the third resistor R383 cannot form a loop with the ground, and the potential difference across the second capacitor C672 connected in parallel between the gate and source of the MOS tube Q15 is 0, so that there is no voltage difference between the gate and source of the MOS tube Q15, so that the source and drain of the MOS tube Q15 are turned off, so that the output voltage of the voltage output terminal Out6 is 0.

[0052] Continue to refer to Figure 2 The driving voltage generating circuit includes a boost circuit, a charge pump circuit, a clock circuit and an amplifier circuit. Specifically:

[0053] The boost circuit includes a second voltage input terminal IN7 and a second voltage output terminal Out7. The second voltage input terminal IN7 is connected to the voltage output terminal Out6 of the switch circuit. After receiving the voltage input by the switch circuit, the boost circuit boosts the voltage to a target voltage value V+ and outputs the voltage through the second voltage output terminal Out7.

[0054] The charge pump circuit includes a third voltage input terminal IN8 and a third voltage output terminal Out8. The third voltage input terminal IN8 is connected to the second voltage output terminal Out7 of the boost circuit. The charge pump circuit converts the target voltage value V+ output by the boost circuit into a voltage value V- with the same absolute value and opposite direction, and outputs it from the third voltage output terminal Out8.

[0055] The clock circuit includes a fourth voltage input terminal IN9 and a fourth voltage output terminal Out9. The fourth voltage input terminal IN9 is connected to the voltage output terminal Out6 of the switch circuit. After the clock circuit receives the voltage input by the switch circuit, it passes through the internal RC oscillation circuit and outputs the oscillation voltage from the fourth voltage output terminal Out9. Figure 6 In the oscillating voltage, the frequency of alternating high and low levels is a preset frequency, the duty cycle of the high and low levels is a preset duty cycle, the high level voltage value is equal to the second voltage source, and the low level voltage value is 0V;

[0056] The amplifier circuit includes a fifth voltage input terminal IN10, a sixth voltage input terminal IN11, a seventh voltage input terminal IN12 and a driving voltage output terminal Out10. The fifth voltage input terminal IN10 is connected to the second voltage output terminal Out7 of the boost circuit, the sixth voltage input terminal IN11 is connected to the third voltage output terminal Out8 of the charge pump circuit, and the seventh voltage input terminal IN12 is connected to the fourth voltage output terminal OUT9 of the clock circuit. The amplifier circuit receives the voltage values ​​V+ and V- through the fifth voltage input terminal IN10 and the sixth voltage input terminal IN11 and the oscillation voltage through the seventh voltage input terminal IN12, and converts these voltage signals to obtain the target driving voltage, which is output from the driving voltage output terminal Out10. If the voltage output terminal Out6 of the switch circuit does not output voltage, there is no voltage at the subsequent voltage output terminals, and there is no voltage output at the driving voltage output terminal Out10.

[0057] In the present invention, the target driving voltage obtained by converting the above voltage signal is a voltage that alternates between high and low levels. Figure 6 , wherein the high level voltage value is equal to the voltage value V+, the low level voltage value is the voltage value V-, the alternating frequency is the aforementioned preset frequency, and the high and low level duty ratio is the aforementioned preset duty ratio.

[0058] The utility model also provides a 2D / 3D switchable display device, which comprises: a display panel; a driving electrode connected to the display panel, and the driving module as described above.

[0059] The utility model can cut off the power supply of the driving voltage generating circuit by placing the switch circuit in front, thereby improving safety and significantly reducing power consumption. At the same time, the utility model designs a data interface expansion circuit and a corresponding bidirectional data port, which can perform bidirectional signal transmission with external devices, and has stronger expandability and practicality.

[0060] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0061] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0062] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A light field driving module, characterized in that: include: A control circuit, comprising an instruction input terminal and a signal output terminal, for controlling a level signal outputted by the signal output terminal according to an instruction for switching 2D / 3D display received by the instruction input terminal; The switch circuit comprises an enable input terminal connected to the signal output terminal of the control circuit, a first voltage input terminal connected to a voltage source, and a first voltage output terminal, and is used to control whether the first voltage output terminal is connected to the first voltage input terminal according to the level signal, thereby controlling the first voltage output terminal to output a corresponding voltage; The driving voltage generating circuit includes a second voltage input terminal connected to the first voltage output terminal of the switching circuit and a driving voltage output terminal connected to the driving electrode of the display device, and is used to receive the voltage output by the switching circuit, generate a driving voltage, and output it to the driving electrode of the display device.

2. The light field driving module according to claim 1, characterized in that: The level signal output by the control signal output terminal is specifically: the level signal corresponding to switching 2D / 3D display is set to a high level, otherwise it is set to a low level, and the switch circuit controls the first voltage output terminal and the first voltage input terminal to be connected or not accordingly, thereby controlling the first voltage output terminal to output a corresponding voltage.

3. The light field driving module according to claim 1, characterized in that: The control circuit includes a data interface expansion circuit and a single-chip microcomputer circuit connected in sequence; The data interface expansion circuit includes a first upstream end and at least one downstream end, the first upstream end is a command input end of the data interface expansion circuit, and its downstream end is connected to the single-chip circuit, and sends the instruction of switching 2D / 3D display received by the first upstream end to the single-chip circuit; The single chip circuit includes a second upstream terminal and a signal output terminal, the second upstream terminal is connected to a downstream terminal of the data interface expansion circuit, and the signal output terminal is connected to an enable input terminal of the switch circuit; The single chip circuit is used for switching 2D / 3D display according to whether or not the instruction received by the second uplink end is switched, and outputting a corresponding high / low level signal through the signal output end.

4. The light field driving module according to claim 3, characterized in that: The single chip microcomputer circuit also includes a bidirectional data port; The single-chip circuit converts the signal received by the second uplink end into a signal of a corresponding protocol and sends it to an external device through the bidirectional data port; Alternatively, the single-chip microcomputer circuit receives a data parameter signal sent by an external device through the bidirectional data port, converts the data parameter signal into a signal of a corresponding protocol, and outputs the signal to the data interface expansion circuit through the second upstream end.

5. The light field driving module according to claim 3, characterized in that: The number of the downstream ends is four, and the downstream ends are connected to external devices for inputting or outputting corresponding signals.

6. The light field driving module according to claim 3, characterized in that: The data interface expansion circuit adopts a USB-HUB circuit, including a first USB upstream end and at least one USB downstream end, and the second upstream end of the single-chip circuit is correspondingly designed as a second USB upstream end.

7. The light field driving module according to claim 3, characterized in that: The switch circuit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, a second capacitor, a triode, and a MOS tube; Among them, one end of the first resistor is connected to the signal output end of the single-chip computer circuit, and the other end is respectively connected to the base of the transistor and one end of the fourth resistor R8, and the other end of the fourth resistor R8 is grounded; the collector of the transistor is respectively connected to one end of the second resistor and the third resistor, the first capacitor is connected in parallel between the base and the emitter of the transistor, and the emitter of the transistor is grounded; the other end of the second resistor is connected to the gate of the MOS tube, the other end of the third resistor is connected to the source of the MOS tube, and a node is led out as its first voltage input end, the second capacitor is connected in parallel between the gate and the source of the MOS tube, the drain of the MOS tube is grounded through an RC parallel circuit, and a node is led out between the drain of the MOS tube and the RC parallel circuit as its first voltage output end.

8. A 2D / 3D switchable display device, characterized in that: include: Display panel; A driving electrode, connected to the display panel; And, a driving module as described in any one of claims 1-7.

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