Panel driving circuit and driving method thereof, and display device

Abstract

Provided are a panel driving circuit, a driving method thereof, and a display device, belonging to the field of display technology. The driving circuit includes: a first switching circuit and a second switching circuit. The first switching circuit can control the on / off of a pull-down power supply terminal and a control terminal of the second switching circuit based on a first timing control signal provided by a first timing control terminal. The control terminal of the second switching circuit is also coupled to the first driving power supply terminal, and the second switching circuit can control the on / off of the first driving power supply terminal and the signal output terminal based on the potential received by its control terminal. In addition, the signal output terminal is coupled to a polarization control panel. In this way, by flexibly setting the first timing control signal, the first driving power supply terminal can transmit a driving power supply signal to the polarization control panel via the signal output terminal, so that the polarization control panel can convert the light emitted by the liquid crystal display panel into polarized light. The panel driving circuit has a simple structure and low cost, is convenient for mass production, and can be convenient for narrow-frame design.

Description

Technical Field

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

[0002] Three-dimensional (3D) display technology is a display technology that uses the viewer's left and right eyes to receive different images, giving the viewer stereoscopic vision, which can bring the viewer a better visual experience.

[0003] In related technologies, in 3D display scenarios, the display device generally includes: a liquid crystal display (LCD) panel, a polarization control panel, and a panel driver circuit. The panel driver circuit generally includes a gate driver circuit and a source driver circuit. The gate driver circuit is used to transmit a gate drive signal to the polarization control panel, and the source driver circuit is used to transmit a source drive signal to the polarization control panel. The polarization control panel is used to convert the light emitted by the LCD panel into two different polarized directions, horizontal and vertical, based on the gate drive signal and the source drive signal. This allows viewers to use 3D equipment (such as 3D glasses) to separate the left and right eye parallax images, thereby achieving 3D display.

[0004] However, the current panel driving circuit has a relatively complex structure and high cost, which is not conducive to mass production and is not conducive to the narrow frame design of the display device. Summary of the Invention

[0005] Provided are a panel drive circuit, a drive method thereof, and a display device, which can solve the problems of the related art in which the panel drive circuit has a relatively complex structure and high cost. The technical solution is as follows:

[0006] In one aspect, a panel driving circuit for a display device is provided, wherein the display device includes: a liquid crystal display panel and a polarization control panel; the panel driving circuit includes: at least one first switching circuit and at least one second switching circuit corresponding to each other;

[0007] The control terminal of the at least one first switch circuit is coupled to the at least one first timing control terminal in a one-to-one correspondence, the input terminal of each first switch circuit is coupled to the pull-down power terminal, the output terminal of each first switch circuit is coupled to the control terminal of a corresponding second switch circuit, and each first switch circuit is configured to control the on / off state of the pull-down power terminal and the control terminal of the coupled second switch circuit based on a first timing control signal provided by the coupled first timing control terminal;

[0008] The control terminal and input terminal of the at least one second switch circuit are coupled to the at least one first driving power terminal in a one-to-one correspondence, the output terminal of each second switch circuit is coupled to the signal output terminal, and each second switch circuit is used to control the on / off of the coupled first driving power terminal and the signal output terminal based on the potential of the control terminal of each second switch circuit;

[0009] In which, the signal output end is used to couple with the polarization control panel, and the first driving power signal provided by the first driving power end is used for the polarization control panel to control the deflection of the liquid crystal molecules included therein to convert the light emitted by the liquid crystal display panel into polarized light with a polarization direction.

[0010] Optionally, the polarization direction includes: a first direction and a second direction perpendicular to each other;

[0011] If the polarization control panel is used to convert the light emitted by the liquid crystal display panel into polarized light in the first direction by default, then the panel driving circuit includes: a first switching circuit and a second switching circuit, and the first driving power signal provided by the first driving power end coupled to the second switching circuit is used for the polarization control panel to convert the light emitted by the liquid crystal display panel into polarized light in the second direction; otherwise, the panel driving circuit includes: two first switching circuits and two second switching circuits, and the first driving power signals provided by the two first driving power ends correspondingly coupled to the two second switching circuits are respectively used for the polarization control panel to convert the light emitted by the liquid crystal display panel into polarized light in the first direction and polarized light in the second direction.

[0012] Optionally, the first switch circuit includes: a first switch transistor; the second switch circuit includes: a second switch transistor;

[0013] The gate of the first switch transistor is coupled to the first timing control terminal, the first electrode of the first switch transistor is coupled to the pull-down power supply terminal, and the second electrode of the first switch transistor is coupled to the gate of the second switch transistor;

[0014] The gate of the second switch transistor is further coupled to the first electrode of the second switch transistor, and the gate of the second switch transistor and the first electrode of the second switch transistor are both coupled to the first driving power supply terminal, and the second electrode of the second switch transistor is coupled to the signal output terminal;

[0015] Furthermore, the first switching transistor and the second switching transistor are of different types.

[0016] Optionally, the first switching transistor is an N-type transistor; and the second switching transistor is a P-type transistor.

[0017] Optionally, the panel driving circuit further includes: at least one third switch circuit corresponding one-to-one to the at least one first switch circuit, and at least one fourth switch circuit corresponding to the at least one second switch circuit, and the at least one third switch circuit corresponds one-to-one to the at least one fourth switch circuit;

[0018] The control terminal of the at least one third switch circuit is coupled to the at least one second timing control terminal in a one-to-one correspondence, the input terminal of each third switch circuit is coupled to the pull-down power terminal, the output terminal of each third switch circuit is coupled to the control terminal of a corresponding fourth switch circuit, and each third switch circuit is configured to control the on / off state of the pull-down power terminal and the control terminal of the coupled fourth switch circuit based on a second timing control signal provided by the coupled second timing control terminal;

[0019] The control terminal and input terminal of the at least one fourth switch circuit are coupled to at least one second driving power terminal in a one-to-one correspondence, the output terminal of each fourth switch circuit is coupled to the signal output terminal, and each fourth switch circuit is used to control the on / off of the coupled second driving power terminal and the signal output terminal based on the potential of the control terminal of each fourth switch circuit;

[0020] In which, the second driving power signal provided by the second driving power terminal coupled to each of the fourth switching circuits has opposite polarity to the first driving power signal provided by the first driving power terminal coupled to the corresponding second switching circuit, and both are used for the polarization control panel to convert the light emitted by the liquid crystal display panel into polarized light with the same polarization direction.

[0021] Optionally, the third switch circuit includes: a third switch transistor; the fourth switch circuit includes: a fourth switch transistor;

[0022] The gate of the third switch transistor is coupled to the second timing control terminal, the first electrode of the third switch transistor is coupled to the pull-down power supply terminal, and the second electrode of the third switch transistor is coupled to the gate of the fourth switch transistor;

[0023] The gate of the fourth switch transistor is further coupled to the first electrode of the fourth switch transistor, and the gate of the fourth switch transistor and the first electrode of the fourth switch transistor are both coupled to the second driving power supply terminal, and the second electrode of the fourth switch transistor is coupled to the signal output terminal;

[0024] Furthermore, the third switching transistor and the fourth switching transistor are of different types.

[0025] Optionally, the third switch transistor is an N-type transistor; and the fourth switch transistor is a P-type transistor.

[0026] Optionally, the panel driving circuit further includes:

[0027] a first pull-up resistor connected in series between the output terminal of each first switch circuit and the control terminal of a corresponding second switch circuit;

[0028] and a second pull-up resistor connected in series between the output terminal of each of the third switch circuits and the control terminal of a corresponding fourth switch circuit.

[0029] Optionally, the panel driving circuit further includes: a timing control circuit and a gamma circuit;

[0030] The timing control circuit is coupled to the at least one first timing control terminal and the at least one second timing control terminal respectively, and is used to provide a first timing control signal to each of the first timing control terminals, and provide a second timing control signal to each of the second timing control terminals;

[0031] The gamma circuit is respectively connected to the at least one first driving power terminal and the at least one second driving power terminal, and is used to provide a first driving power signal to each first driving power terminal, and provide a second driving power signal to each second driving power terminal.

[0032] Optionally, the signal output end is further coupled to a reference power end and is used to receive a reference power signal provided by the reference power end, wherein the reference power signal is used for the polarization control panel to control the liquid crystal molecules included therein to not deflect.

[0033] Optionally, the panel driving circuit further includes: a third pull-up resistor connected in series between the reference power supply terminal and the signal output terminal.

[0034] Optionally, the panel driving circuit and the polarization control panel are independent of each other and are arranged on a printed circuit board; or, the panel driving circuit is integrated into the polarization control panel.

[0035] In another aspect, a driving method of a panel driving circuit is provided, which is applied to the panel driving circuit as described in the above aspect; the method comprises:

[0036] In response to a frame start signal, at least one first timing control terminal sequentially provides a first timing control signal of a first potential, and at least one first switch circuit sequentially controls the pull-down power supply terminal and the control terminal of a second switch circuit coupled to at least one second switch circuit to conduct based on the first timing control signal of the first potential provided by the coupled first timing control terminal, so that the pull-down power supply terminal transmits a pull-down power supply signal to the control terminal of the second switch circuit, and the potential of the pull-down power supply signal is a second potential;

[0037] For each of the second switch circuits, if the control terminal of the second switch circuit is conductively connected to the pull-down power terminal, the second switch circuit controls the coupled first driving power terminal and the signal output terminal to be disconnected based on the pull-down power signal; if the control terminal of the second switch circuit is not conductively connected to the pull-down power terminal, the second switch circuit controls the first driving power terminal and the signal output terminal to be conductively connected based on the first driving power signal provided by the first driving power terminal, so that the first driving power terminal transmits the first driving power signal to the signal output terminal;

[0038] Among them, the signal output end is used to couple with the polarization control panel, and the first driving power signal provided by the first driving power end is used for the polarization control panel to control the deflection of the liquid crystal molecules included therein to convert the light emitted by the liquid crystal display panel into polarized light with a polarization direction.

[0039] Optionally, the panel driving circuit further includes: at least one third switching circuit corresponding one-to-one to the at least one first switching circuit, and at least one fourth switching circuit corresponding to the at least one second switching circuit, and the at least one third switching circuit corresponds one-to-one to the at least one fourth switching circuit; the method further includes:

[0040] In response to the frame start signal, at least one second timing control terminal sequentially provides a second timing control signal of a first potential, and during the same time period, the potential of the second timing control signal is opposite to the potential of the first timing control signal, and the at least one third switch circuit sequentially controls the pull-down power supply terminal and the control terminal of the coupled fourth switch circuit to be conductive based on the second timing control signal of the first potential provided by the coupled second timing control terminal, so that the pull-down power supply terminal transmits the pull-down power supply signal to the control terminal of the fourth switch circuit;

[0041] For each of the fourth switch circuits, if the control terminal of the fourth switch circuit is conductively connected to the pull-down power terminal, the fourth switch circuit controls the coupled second driving power terminal and the signal output terminal to be disconnected based on the pull-down power signal; if the control terminal of the fourth switch circuit is not conductively connected to the pull-down power terminal, the fourth switch circuit controls the second driving power terminal and the signal output terminal to be conductively connected based on the second driving power signal provided by the second driving power terminal, so that the second driving power terminal transmits the second driving power signal to the signal output terminal;

[0042] In which, the second driving power signal provided by the second driving power terminal coupled to each of the fourth switching circuits has opposite polarity to the first driving power signal provided by the first driving power terminal coupled to the corresponding second switching circuit, and both are used for the polarization control panel to convert the light emitted by the liquid crystal display panel into polarized light with the same polarization direction.

[0043] In another aspect, a display device is provided, comprising: a liquid crystal display panel, a polarization control panel, and the panel driving circuit as described in the above aspect;

[0044] The panel driving circuit is coupled to the polarization control panel and is used to drive the polarization control panel to control the deflection of liquid crystal molecules included therein, so as to convert the light emitted by the liquid crystal display panel into polarized light with a polarization direction.

[0045] In summary, the beneficial effects brought about by the technical solutions provided by the embodiments of the present disclosure may include at least:

[0046] Provided are a panel drive circuit, a drive method thereof, and a display device. The drive circuit includes at least one first switch circuit and at least one second switch circuit. Each first switch circuit is capable of controlling the on / off switching of a correspondingly coupled pull-down power supply terminal and a control terminal of the second switch circuit based on a first timing control signal provided by a correspondingly coupled first timing control terminal. The control terminal of each second switch circuit is also coupled to the first drive power supply terminal, and each second switch circuit is capable of controlling the on / off switching of a correspondingly coupled first drive power supply terminal and a signal output terminal based on a potential received by its control terminal. Furthermore, the signal output terminal is coupled to a polarization control panel in the display device. Thus, by flexibly setting the first timing control signal, the first drive power supply terminal can transmit the first drive power supply signal to the polarization control panel via the signal output terminal, so that the polarization control panel converts light emitted by the liquid crystal display panel into polarized light having a polarization direction. The panel drive circuit has a simple structure and low cost, is convenient for mass production, and can facilitate the narrow-frame design of the display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0048] Figure 1 is a structural schematic diagram of a display device provided by an embodiment of the present disclosure;

[0049] Figure 2 is a structural diagram of a panel driving circuit provided by an embodiment of the present disclosure;

[0050] Figure 3 is a structural diagram of another panel driving circuit provided by an embodiment of the present disclosure;

[0051] Figure 4 is a structural diagram of another panel driving circuit provided by an embodiment of the present disclosure;

[0052] Figure 5 is a structural diagram of another panel driving circuit provided by an embodiment of the present disclosure;

[0053] Figure 6 is a structural diagram of another panel driving circuit provided by an embodiment of the present disclosure;

[0054] Figure 7 is a structural diagram of another panel driving circuit provided by an embodiment of the present disclosure;

[0055] Figure 8 is a structural diagram of another panel driving circuit provided by an embodiment of the present disclosure;

[0056] Figure 9 This is a flow chart of a driving method of a panel driving circuit provided by an embodiment of the present disclosure;

[0057] Figure 10 is a timing diagram of a signal terminal coupled to a panel driving circuit provided by an embodiment of the present disclosure;

[0058] Figure 11 is a schematic diagram of a driving waveform provided by an embodiment of the present disclosure;

[0059] Figure 12 It is a structural schematic diagram of a display device provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0060] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0061] Based on the background technology, Figure 1 A schematic diagram of the structure of a display device in a 3D display scene is shown. Figure 1 As can be seen, the display device may include a liquid crystal display (LCD) panel 10 and a polarization control panel 20. The LCD panel 10 and the polarization control panel 20 are stacked and each includes pixel electrodes, a common electrode, and a liquid crystal layer. The liquid crystal layer includes liquid crystal molecules. The liquid crystal molecules in the liquid crystal layer can be deflected by the voltage difference between the pixel electrode and the common electrode, allowing light to pass through the liquid crystal layer and achieve display. Furthermore, the polarization control panel 20 can be coupled to a panel driver circuit and configured to receive a drive power signal provided by the panel driver circuit to the pixel electrode, thereby creating a voltage difference between the pixel electrode and the common electrode. Furthermore, the polarization control panel 20 can also be configured, under the control of the panel driver circuit, to convert light emitted from the LCD panel 10 into polarized light in a first direction X1 and polarized light in a second direction X2, thereby changing the image displayed by the LCD panel 10 into an image with two different polarization directions. The first direction X1 and the second direction X2 are perpendicular to each other. The first direction X1 can be referred to as the horizontal direction, and the second direction X2 can be referred to as the vertical direction. Of course, in some other embodiments, the first direction X1 may also be a vertical direction, and correspondingly, the second direction X2 may be a horizontal direction. The present disclosure does not limit these two directions. Figure 1 The 3D glasses shown can separate the left and right eye parallax images to achieve 3D display.

[0062] Currently, the panel driving circuit that drives the polarization control panel 20 to convert light is complex in structure and expensive. Therefore, the present disclosure provides a panel driving circuit that has a simple circuit structure, low cost, and can reliably drive the polarization control panel 20 to convert light. Figure 2 FIG. 1 is a schematic diagram of a panel driving circuit of a display device provided by an embodiment of the present disclosure. Figure 2 As shown, the panel driving circuit includes: at least one first switch circuit 01 and at least one second switch circuit 02 in one-to-one correspondence.

[0063] It should be noted that the one-to-one correspondence between A and B means that each A corresponds to a B, and different A's correspond to different B's. Accordingly, the number of A's and B's is the same. For example, the one-to-one correspondence between at least one first switch circuit 01 and at least one second switch circuit 02 can mean that each first switch circuit 01 corresponds to a second switch circuit 02, and different first switch circuits 01 correspond to different second switch circuits 02. Accordingly, the number of first switch circuits 01 is the same as the number of second switch circuits 02. The one-to-one correspondence of other parts described in the following embodiments is similar and will not be repeated here.

[0064] Continue to refer Figure 2 It can be seen that the control terminal of at least one first switch circuit 01 is coupled to at least one first timing control terminal GPIO1 in a one-to-one correspondence (i.e., electrically connected), the input terminal of each first switch circuit 01 is coupled to the pull-down power supply terminal V1, and the output terminal of each first switch circuit 01 is coupled to the control terminal of a corresponding second switch circuit 02. And each first switch circuit 01 is used to control the on and off of the pull-down power supply terminal V1 and the control terminal of the coupled second switch circuit 02 based on the first timing control signal provided by the coupled first timing control terminal GPIO1. Optionally, the pull-down power supply terminal V1 can be Figure 2 The ground terminal GND is shown.

[0065] For example, each first switch circuit 01 can control the pull-down power supply terminal V1 and the control terminal of the second switch circuit 02 to be conductive when the potential of the first timing control signal provided by the first timing control terminal GPIO1 is a first potential, thereby causing the pull-down power supply terminal V1 to transmit the pull-down power signal to the control terminal of the second switch circuit 02. Furthermore, each first switch circuit 01 can control the pull-down power supply terminal V1 and the control terminal of the second switch circuit 02 to be decoupled when the potential of the first timing control signal provided by the first timing control terminal GPIO1 is a second potential.

[0066] Optionally, in an embodiment of the present disclosure, the first potential may be an effective potential, and the second potential may be an invalid potential. Furthermore, of the effective potential and the invalid potential, one may be a high potential, and the other may be a low potential, where the high potential and the low potential are relative. For a circuit including an N-type switching transistor, the first potential may be a high potential relative to the second potential. For a circuit including a P-type switching transistor, the first potential may be a low potential relative to the second potential.

[0067] Continue to refer Figure 2 As can be seen, the control terminal and input terminal of at least one second switch circuit 02 are coupled to at least one first driving power supply terminal GMA1 in a one-to-one correspondence, and the output terminal of each second switch circuit 02 is coupled to the signal output terminal Sout. Each second switch circuit 02 is used to control the on / off of the coupled first driving power supply terminal (also called gamma power supply terminal) GMA1 and the signal output terminal Sout based on the potential of the control terminal.

[0068] For example, each second switch circuit 02 can control the coupled first driving power supply terminal GMA1 and the signal output terminal Sout to be conductive when the potential of the control terminal thereof is a first potential, thereby causing the first driving power supply terminal GMA1 to transmit the first driving power signal to the signal output terminal Sout. Furthermore, each second switch circuit 02 can control the coupled first driving power supply terminal GMA1 and the signal output terminal Sout to be decoupled when the potential of the control terminal thereof is a second potential.

[0069] Since the control terminal of the second switch circuit 02 is coupled to the output terminal of the first switch circuit 01 and the first driving power terminal GMA1 respectively, the potential of the control terminal of the second switch circuit 02 may include: the pull-down power signal transmitted by the first switch circuit 01 and the first driving power signal.

[0070] For example, when the first switch circuit 01 controls the pull-down power supply terminal V1 and the control terminal of the second switch circuit 02 to be conductive, the control terminal of the second switch circuit 02 can receive a pull-down power supply signal and, based on the pull-down power supply signal, can control the first driving power supply terminal GMA1 and the signal output terminal Sout to be conductive. When the first switch circuit 01 controls the pull-down power supply terminal V1 and the control terminal of the second switch circuit 02 to be decoupled, the control terminal of the second switch circuit 02 can receive a first driving power supply signal and, based on the first driving power supply signal, can control the first driving power supply terminal GMA1 and the signal output terminal Sout to be decoupled.

[0071] Among them, combined Figure 1 In the embodiment of the present disclosure, the signal output terminal Sout coupled to the panel driving circuit is used to couple to the polarization control panel 20. Accordingly, when the first switch circuit 01 and the second switch circuit 02 included in the panel driving circuit cooperate with each other according to the above-mentioned working logic to control the first driving power supply terminal GMA1 to be conductive with the signal output terminal Sout, the first driving power supply terminal GMA1 can transmit a first driving power supply signal to the polarization control panel 20 via the signal output terminal Sout. Furthermore, the first driving power supply signal provided by the first driving power supply terminal GMA1 can be used by the polarization control panel 20 to control the deflection of the liquid crystal molecules included therein, thereby converting the light emitted by the liquid crystal display panel 10 into polarized light having a polarization direction.

[0072] In summary, embodiments of the present disclosure provide a panel drive circuit for a display device. The drive circuit includes at least one first switch circuit and at least one second switch circuit. Each first switch circuit is capable of controlling the on / off switching of a correspondingly coupled pull-down power supply terminal and a control terminal of the second switch circuit based on a first timing control signal provided by a correspondingly coupled first timing control terminal. The control terminal of each second switch circuit is also coupled to the first drive power supply terminal, and each second switch circuit is capable of controlling the on / off switching of a correspondingly coupled first drive power supply terminal and a signal output terminal based on a potential received by its control terminal. Furthermore, the signal output terminal is coupled to a polarization control panel in the display device. Thus, by flexibly setting the first timing control signal, the first drive power supply terminal can transmit the first drive power supply signal to the polarization control panel via the signal output terminal, so that the polarization control panel can convert light emitted by the liquid crystal display panel into polarized light having a polarization direction. The panel drive circuit has a simple structure and low cost, is convenient for mass production, and can facilitate the narrow-frame design of the display device.

[0073] Figure 3 FIG. 1 is a structural diagram of another panel driving circuit provided by an embodiment of the present disclosure. Figure 3 As shown, the panel driving circuit may further include: at least one third switch circuit 03 corresponding one-to-one to at least one first switch circuit 01, and at least one fourth switch circuit 04 corresponding to at least one second switch circuit 02, and at least one third switch circuit 03 corresponds one-to-one to at least one fourth switch circuit 04.

[0074] refer to Figure 3 As can be seen, the control terminal of at least one third switch circuit 03 can be coupled in a one-to-one correspondence with at least one second timing control terminal GPIO2. The input terminal of each third switch circuit 03 can be coupled to the pull-down power supply terminal V1, and the output terminal of each third switch circuit 03 can be coupled to the control terminal of a corresponding fourth switch circuit 04. Furthermore, each third switch circuit 03 can be used to control the on / off state of the pull-down power supply terminal V1 and the control terminal of the coupled fourth switch circuit 04 based on the second timing control signal provided by the coupled second timing control terminal GPIO2.

[0075] For example, each third switch circuit 03 can control the pull-down power supply terminal V1 and the control terminal of the fourth switch circuit 04 to be conductive when the potential of the second timing control signal provided by the second timing control terminal GPIO2 is a first potential, thereby causing the pull-down power supply terminal V1 to transmit the pull-down power signal to the control terminal of the fourth switch circuit 04. Furthermore, each third switch circuit 03 can control the pull-down power supply terminal V1 and the control terminal of the fourth switch circuit 04 to be decoupled when the potential of the second timing control signal provided by the second timing control terminal GPIO2 is a second potential.

[0076] Continue to refer Figure 3 It can be seen that the control terminal and input terminal of at least one fourth switch circuit 04 can be coupled to at least one second driving power supply terminal GMA2 in a one-to-one correspondence, and the output terminal of each fourth switch circuit 04 can be coupled to the signal output terminal Sout. In addition, each fourth switch circuit 04 can be used to control the on / off of the coupled second driving power supply terminal GMA2 and the signal output terminal Sout based on the potential of the control terminal of each fourth switch circuit 04.

[0077] For example, each fourth switch circuit 04 can control the coupled second driving power supply terminal GMA2 and the signal output terminal Sout to be conductive when the potential of the control terminal thereof is a first potential, thereby causing the second driving power supply terminal GMA2 to transmit the second driving power signal to the signal output terminal Sout. Furthermore, each fourth switch circuit 04 can control the coupled second driving power supply terminal GMA2 and the signal output terminal Sout to be decoupled when the potential of the control terminal thereof is a second potential.

[0078] Since the control terminal of the fourth switch circuit 04 is coupled to the output terminal of the third switch circuit 03 and the second driving power terminal GMA2 respectively, the potential of the control terminal of the fourth switch circuit 04 may include: the pull-down power signal transmitted by the third switch circuit 03 and the second driving power signal.

[0079] For example, when the third switch circuit 03 controls the pull-down power supply terminal V1 and the control terminal of the fourth switch circuit 04 to be conductive, the control terminal of the fourth switch circuit 04 can receive a pull-down power supply signal and, based on the pull-down power supply signal, can control the second driving power supply terminal GMA2 and the signal output terminal Sout to be conductive. When the third switch circuit 03 controls the pull-down power supply terminal V1 and the control terminal of the second switch circuit 02 to be decoupled, the control terminal of the fourth switch circuit 04 can receive a second driving power supply signal and, based on the second driving power supply signal, can control the second driving power supply terminal GMA2 and the signal output terminal Sout to be decoupled.

[0080] Among them, the second driving power signal provided by the second driving power terminal GMA2 coupled to each fourth switching circuit 04 and the first driving power signal provided by the first driving power terminal GMA1 coupled to the corresponding second switching circuit 02 can have opposite polarities, and both can be used for the polarization control panel 20 to convert the light emitted by the liquid crystal display panel 10 into polarized light with the same polarization direction.

[0081] For example, combined with Figure 1Taking the polarization direction of the polarized light converted by the polarization control panel 20 as an example, which includes a first direction X1 and a second direction X2 perpendicular to each other (i.e., a horizontal direction and a vertical direction), in each second switch circuit 02 and each fourth switch circuit 04, the polarity of the first drive power signal provided by the first drive power terminal GAM1 coupled to the second switch circuit 02 and the polarity of the second drive power signal provided by the second drive power terminal GMA2 coupled to the fourth switch circuit 04 can be opposite, but both can be used for the polarization control panel 20 to convert the light emitted by the liquid crystal display panel 10 into polarized light having the first direction X1 or the second direction X2. The opposite polarity of the two drive power signals can mean that the potential of one of the drive power signals is greater than the potential on the common electrode (which can be called positive polarity), which is a high potential; the potential of the other drive power signal is less than the potential on the common electrode (which can be called negative polarity), but the voltage difference between each drive power signal and the potential on the common electrode is equal, which is a low potential.

[0082] That is, in the embodiment of the present disclosure, four driving power supply terminals can be provided to provide driving power supply signals to the polarization control panel 20, and the driving power supply signals provided by two of the driving power supply terminals are high and low power supply signals for generating horizontally polarized light for the polarization control panel 20, and the driving power supply signals provided by the other two driving power supply terminals are high and low power supply signals for generating vertically polarized light for the polarization control panel 20. In this way, the liquid crystal molecules in the polarization control panel 20 can be deflected back and forth in one direction for positive polarity drive and in the other direction for negative polarity drive, thereby avoiding polarization of the liquid crystal molecules and ensuring good operating reliability of the polarization control panel 20.

[0083] Figure 4 FIG. 1 is a structural diagram of another panel driving circuit provided by an embodiment of the present disclosure. Figure 7 As shown, the panel driving circuit may further include: a timing controller (Tcon) control circuit 05 and a gamma circuit 06 .

[0084] The timing control circuit 05 can be coupled to at least one first timing control terminal GPIO1 and at least one second timing control terminal GPIO2, respectively. The timing control circuit 05 can be used to provide a first timing control signal to each first timing control terminal GPIO1 and a second timing control signal to each second timing control terminal GPIO2.

[0085] The gamma circuit 06 can be connected to at least one first driving power terminal GMA1 and at least one second driving power terminal GMA2, respectively, and can be used to provide a first driving power signal to each first driving power terminal GMA1 and a second driving power signal to each second driving power terminal GMA2.

[0086] Optionally, in the embodiment of the present disclosure, taking the polarization direction including: a first direction X1 and a second direction X2 perpendicular to each other as an example, if the polarization control panel 20 is used to convert the light emitted by the liquid crystal display panel 10 into polarized light in the first direction X1 by default, then:

[0087] like Figure 5 As shown, the panel driving circuit described in the embodiment of the present disclosure may include: a first switch circuit 01 and a second switch circuit 02, and the first drive power supply signal provided by the first drive power supply terminal GMA1 coupled to the second switch circuit 02 can be used to enable the polarization control panel 20 to convert the light emitted by the liquid crystal display panel 10 into polarized light in the second direction X2. Otherwise:

[0088] like Figure 6 As shown, the panel driving circuit recorded in the embodiment of the present disclosure may include: two first switching circuits 01 and two second switching circuits 02, and the first driving power supply signals provided by the two first driving power supply terminals GMA1 coupled to the two second switching circuits 02 can be used respectively for the polarization control panel 20 to convert the light emitted by the liquid crystal display panel 10 into polarized light in the first direction X1 and the second direction X2.

[0089] The polarization control panel 20 is used to convert the light emitted by the liquid crystal display panel 10 into polarized light in the first direction X1 by default, which may mean that when the polarization control panel 20 does not receive any driving power signal transmitted by the panel driving circuit, the liquid crystal molecules therein are deflected in one direction by default, so that the light emitted by the liquid crystal display panel 10 can be directly converted into polarized light in the first direction X1.

[0090] In 3D display, the polarization control panel 20 converts the light emitted by the LCD panel into two polarized lights in perpendicular directions. Therefore, based on the default conversion of the light emitted by the liquid crystal display panel 10 by the polarization control panel 20 into polarized light in the first direction X1, the polarization control panel 20 can be used as follows: Figure 5 As shown, only a first switch circuit 01 and a second switch circuit 02 are provided to transmit a first driving power signal to the polarization control panel 20. The polarization control panel 20 is driven by the first driving power signal to convert the light emitted by the LCD panel into polarized light in the second direction X2. Of course, if the liquid crystal polarization is to be prevented, the polarization control panel 20 can be combined with the first switching circuit 01 and the second switching circuit 02 to transmit a first driving power signal to the polarization control panel 20. Figure 3 and Figure 4 It can be seen that Figure 5As shown, the panel driving circuit may further include a third switching circuit 03 corresponding to the first switching circuit 01, and a fourth switching circuit 04 corresponding to the second switching circuit 02, so as to transmit a second driving power signal to the polarization control panel 20. The polarization control panel 20 may be driven by the second driving power signal to convert the light emitted by the LCD panel into polarized light in the second direction X2, but the polarity of the second driving power signal is opposite to that of the first driving power signal.

[0091] On the basis that the polarization control panel 20 does not convert the light emitted by the liquid crystal display panel 10 into polarized light in the first direction X1 by default, it can be as follows Figure 6 As shown, two first switch circuits 01 and two second switch circuits 02 are provided to transmit two different first driving power signals to the polarization control panel 20. Driven by the two first driving power signals, the polarization control panel 20 converts the light emitted by the LCD panel into polarized light in the first direction X1 and polarized light in the second direction X2. Of course, if the liquid crystal polarization is to be prevented, the polarization control panel 20 can be combined with the first switch circuit 01 to transmit two different first driving power signals to the polarization control panel 20. Figure 3 and Figure 4 It can be seen that Figure 6 As shown, the panel driving circuit may further include two third switching circuits 03 corresponding to the two first switching circuits 01, and two fourth switching circuits 04 corresponding to the two second switching circuits 02, so as to transmit two different second driving power signals to the polarization control panel 20. Driven by the two second driving power signals, the polarization control panel 20 converts the light emitted by the LCD panel into polarized light in the first direction X1 and the second direction X2, respectively, but the polarity of the second driving power signal is opposite to that of the first driving power signal.

[0092] exist Figure 6 On the basis of Figure 7 FIG. 1 shows a structural diagram of another panel driving circuit. Figure 7 As shown, the first switch circuit 01 may include: a first switch transistor U1. The second switch circuit 02 may include: a second switch transistor U2.

[0093] The gate of the first switch transistor U1 can be coupled to the first timing control terminal GPIO1, the first electrode of the first switch transistor U1 can be coupled to the pull-down power supply terminal V1, and the second electrode of the first switch transistor U1 can be coupled to the gate of the second switch transistor U2.

[0094] The gate of the second switching transistor U2 can also be coupled to the first electrode of the second switching transistor U2, and the gate of the second switching transistor U2 and the first electrode of the second switching transistor U2 can both be coupled to the first driving power supply terminal GMA1, and the second electrode of the second switching transistor U2 can be coupled to the signal output terminal Sout.

[0095] Furthermore, the types of the first switching transistor U1 and the second switching transistor U2 may be different. Figure 7 , the first switch transistor U1 shown therein may be an N-type transistor, and the second switch transistor U2 may be a P-type transistor.

[0096] Optional, continue to refer to Figure 7 It can be seen that the third switch circuit 03 may include: a third switch transistor U3. The fourth switch circuit 04 may include: a fourth switch transistor U4.

[0097] The gate of the third switch transistor U3 can be coupled to the second timing control terminal GPIO2, the first electrode of the third switch transistor U3 can be coupled to the pull-down power supply terminal V1, and the second electrode of the third switch transistor U3 can be coupled to the gate of the fourth switch transistor U4.

[0098] The gate of the fourth switch transistor U4 can also be coupled to the first electrode of the fourth switch transistor U4, and the gate of the fourth switch transistor U4 and the first electrode of the fourth switch transistor U4 can both be coupled to the second driving power supply terminal GMA2, and the second electrode of the fourth switch transistor U4 can be coupled to the signal output terminal Sout.

[0099] Furthermore, the third switch transistor U3 and the fourth switch transistor U4 are of different types. Figure 7 , the third switch transistor U3 shown therein may be an N-type transistor, and the fourth switch transistor U4 may be a P-type transistor.

[0100] Accordingly, as described in the above embodiment, for the N-type first switching transistor U1 and the third switching transistor U3, the first potential (i.e., the effective potential) can be a high potential, and the second potential (i.e., the ineffective potential) can be a low potential. For the P-type second switching transistor U2 and the fourth switching transistor U4, the first potential can be a low potential, and the second potential can be a high potential.

[0101] Of course, in some other embodiments, the first switch transistor U1 may also be a P-type transistor, and accordingly, the second switch transistor U2 may be an N-type transistor. Also, the third switch transistor U3 may also be a P-type transistor, and accordingly, the fourth switch transistor U4 may be an N-type transistor.

[0102] Optional, continue to refer to Figure 7 It can be seen that the panel driving circuit recorded in the embodiment of the present disclosure may further include:

[0103] A first pull-up resistor R1 is connected in series between the output terminal of each first switch circuit 01 and the control terminal of a corresponding second switch circuit 02 .

[0104] And, a second pull-up resistor R2 is connected in series between the output terminal of each third switch circuit 03 and the control terminal of a corresponding fourth switch circuit 04 .

[0105] Among them, the first pull-up resistor R1 can be used to reliably pull up the control terminal of the second switch circuit 02 to the first driving power terminal GMA1 coupled thereto when the pull-down power terminal V1 and the control terminal of the second switch circuit 02 (i.e., the gate of the second switching transistor U2) are not conductive, so as to receive the first driving power signal provided by the first driving power terminal GMA1. Similarly, the second pull-up resistor R2 can be used to reliably pull up the control terminal of the fourth switch circuit 04 to the second driving power terminal GMA2 coupled thereto when the pull-down power terminal V1 and the control terminal of the fourth switch circuit 04 (i.e., the gate of the fourth switching transistor U4) are not conductive, so as to receive the second driving power signal provided by the second driving power terminal GMA2.

[0106] Optional, Figure 8 FIG. 1 is a structural diagram of another panel driving circuit provided by an embodiment of the present disclosure. Figure 8 As shown, the signal output terminal Sout of the panel driving circuit can also be coupled to the reference power terminal Vref and is used to receive a reference power signal provided by the reference power terminal Vref.

[0107] The reference power signal can be used to control the polarization control panel 20 to prevent the liquid crystal molecules from deflecting. That is, when the display device is turned on or off, the reference power signal can be transmitted from the reference power terminal Vref to the polarization control panel 20 via the signal output terminal Sout to reset the polarization control panel 20.

[0108] For example, in combination with the above embodiments, it can be seen that if the liquid crystal molecules are to be controlled not to deflect, there should be no voltage difference between the pixel electrode and the common electrode. Therefore, it can be seen that the potential of the reference power signal can be approximately equal to the potential on the common electrode.

[0109] Optional, continue to refer to Figure 8 As can be seen, the panel driver circuit described in the embodiment of the present disclosure further includes a third pull-up resistor R3 connected in series between the reference power terminal Vref and the signal output terminal Sout. The third pull-up resistor R3 can be used to reliably pull the signal output terminal Sout up to the coupled reference power terminal Vref when the device is turned on or off, thereby receiving a reference power signal provided by the reference power terminal Vref.

[0110] Combining the above embodiment, it can be seen that, as an optional implementation method, combining Figures 6 to 8The panel driving circuit described in the embodiment of the present disclosure may include two first switch circuits 01 , two second switch circuits 02 , two third switch circuits 03 and two fourth switch circuits 04 .

[0111] It should be noted that Figures 6 to 8 For the purpose of distinction, the two first switch circuits 01 are respectively identified as 01-1 and 01-2, and the corresponding coupled first timing control terminals GPIO1 are respectively identified as GPIO1-1 and GPIO1-2. Similarly, the two second switch circuits 02 are respectively identified as 02-1 and 02-2, and the corresponding coupled first drive power terminals GMA1 are respectively identified as GMA1-1 and GMA1-2. The two third switch circuits 03 are respectively identified as 03-1 and 03-2, and the corresponding coupled second timing control terminals GPIO2 are respectively identified as GPIO2-1 and GPIO2-2. The two fourth switch circuits 04 are respectively identified as 04-1 and 04-2, and the corresponding coupled second drive power terminals GMA2 are respectively identified as GMA2-1 and GMA2-2.

[0112] It should also be noted that, in terms of circuit structure, the panel driving circuit may include four N-type transistors, namely, two first switch transistors U1 and two third switch transistors U3 , and four P-type transistors, namely, two second switch transistors U2 and two fourth switch transistors U4 . Figure 7 For the purpose of distinction, the two first switch transistors U1 are respectively identified as U1-1 and U1-2. Similarly, the two second switch transistors U2 are respectively identified as U2-1 and U2-2. The two third switch transistors U3 are respectively identified as U3-1 and U3-2. And, the two fourth switch transistors U4 are respectively identified as U4-1 and U4-2. And, accordingly, continue to combine Figure 7 It can be seen that the panel driving circuit may include five pull-up resistors, namely, two first pull-up resistors R1 , two second pull-up resistors R2 and one third pull-up resistor R3 . Figure 7 For differentiation, the two first pull-up resistors R1 are labeled as R1-1 and R1-2, respectively. Similarly, the two second pull-up resistors R2 are labeled as R2-1 and R2-2, respectively.

[0113] Of course, as another optional implementation, combining Figure 5It can be seen that based on the fact that the polarization control panel 20 converts the light emitted by the liquid crystal display panel 10 into polarized light of one direction by default, it can be simplified to retain only a first switch circuit 01, a second switch circuit 02, a third switch circuit 03, and a fourth switch circuit. Accordingly, it can be simplified to retain only a first driving power supply terminal GMA1 and a second driving power supply terminal GMA2, as well as a first timing control terminal GPIO1 and a second timing control terminal GPIO2. As for the circuit structure, Figure 7 Combined with the basic Figure 5 It can be seen that the switch transistors can be simplified to retain a first N-type switch transistor U1, a third N-type switch transistor U3, a second N-type switch transistor U2, and a fourth P-type switch transistor U4.

[0114] Optionally, in the embodiment of the present disclosure, the panel driving circuit and the polarization control panel 20 may be independent of each other and disposed on a printed circuit board assembly (PCBA).

[0115] Alternatively, the panel driver circuit can be integrated into the polarization control panel 20, that is, placed in the polarization control panel 20. This is similar to the arrangement of integrating the gate driver circuit into the array substrate row driver (GOA) of the display panel. This can further facilitate a narrow frame design.

[0116] Based on the above embodiments, it can be seen that the panel driving circuit provided by the embodiments of the present disclosure has a simple structure and a simple working principle, and can reliably drive the polarization control panel to convert light into polarized light, which is conducive to mass production.

[0117] In summary, embodiments of the present disclosure provide a panel drive circuit for a display device. The drive circuit includes at least one first switch circuit and at least one second switch circuit. Each first switch circuit is capable of controlling the on / off switching of a correspondingly coupled pull-down power supply terminal and a control terminal of the second switch circuit based on a first timing control signal provided by a correspondingly coupled first timing control terminal. The control terminal of each second switch circuit is also coupled to the first drive power supply terminal, and each second switch circuit is capable of controlling the on / off switching of a correspondingly coupled first drive power supply terminal and a signal output terminal based on a potential received by its control terminal. Furthermore, the signal output terminal is coupled to a polarization control panel in the display device. Thus, by flexibly setting the first timing control signal, the first drive power supply terminal can transmit the first drive power supply signal to the polarization control panel via the signal output terminal, so that the polarization control panel can convert light emitted by the liquid crystal display panel into polarized light having a polarization direction. The panel drive circuit has a simple structure and low cost, is convenient for mass production, and can facilitate the narrow-frame design of the display device.

[0118] Figure 9 This is a flow chart of a driving method of a panel driving circuit provided by an embodiment of the present disclosure, which can be applied to Figures 2 to 8 In any of the panel drive circuits shown. Figure 9 As shown, the method includes:

[0119] Step 901, in response to a frame start signal, at least one first timing control terminal sequentially provides a first timing control signal of a first potential, and at least one first switching circuit sequentially controls the pull-down power supply terminal and the control terminal of the second switching circuit coupled in at least one second switching circuit to be turned on based on the first timing control signal of the first potential provided by the coupled first timing control terminal, so that the pull-down power supply terminal transmits the pull-down power supply signal to the control terminal of the second switching circuit.

[0120] The potential of the pull-down power signal may be a second potential.

[0121] Step 902: For each second switch circuit, if the control terminal of the second switch circuit is conductively connected to the pull-down power terminal, the second switch circuit controls the first driving power terminal and the signal output terminal to be disconnected based on the pull-down power signal. If the control terminal of the second switch circuit is not conductively connected to the pull-down power terminal, the second switch circuit controls the first driving power terminal and the signal output terminal to be conductively connected based on the first driving power signal provided by the first driving power terminal, so that the first driving power terminal transmits the first driving power signal to the signal output terminal.

[0122] Among them, the signal output end is used to couple with the polarization control panel, and the first driving power supply signal provided by the first driving power supply end is used for the polarization control panel to control the deflection of the liquid crystal molecules included therein to convert the light emitted by the liquid crystal display panel into polarized light with a polarization direction.

[0123] Optionally, in some embodiments, Figure 3 As shown, the panel driving circuit may further include: at least one third switch circuit 03 corresponding to at least one first switch circuit 01, and at least one fourth switch circuit 04 corresponding to at least one second switch circuit 02, and at least one third switch circuit 03 corresponds to at least one fourth switch circuit 04. Accordingly, it can be seen that the driving method may further include:

[0124] In response to the frame start signal, at least one second timing control terminal sequentially provides a second timing control signal of a first potential, and in the same period, the potential of the second timing control signal is opposite to the potential of the first timing control signal. At least one third switching circuit sequentially controls the pull-down power supply terminal and the control terminal of the coupled fourth switching circuit to be turned on based on the second timing control signal of the first potential provided by the coupled second timing control terminal, so that the pull-down power supply terminal transmits the pull-down power supply signal to the control terminal of the fourth switching circuit.

[0125] For each fourth switch circuit, if the control terminal of the fourth switch circuit is conductively connected to the pull-down power terminal, the fourth switch circuit controls the second driving power terminal and the signal output terminal to be disconnected based on the pull-down power signal. If the control terminal of the fourth switch circuit is not conductively connected to the pull-down power terminal, the fourth switch circuit controls the second driving power terminal and the signal output terminal to be conductively connected based on the second driving power signal provided by the second driving power terminal, so that the second driving power terminal transmits the second driving power signal to the signal output terminal.

[0126] Among them, the second driving power signal provided by the second driving power end coupled to each fourth switching circuit has a polarity opposite to the first driving power signal provided by the first driving power end coupled to the corresponding second switching circuit, and both are used for the polarization control panel to convert the light emitted by the liquid crystal display panel into polarized light with the same polarization direction.

[0127] Optional, with Figure 7 Taking the structure shown in FIG. 1 as an example, where the first potential is a high potential and the second potential is a low potential, the working principle of the panel driving circuit described in the embodiment of the present disclosure is described as follows:

[0128] For example, Figure 10 shows a signal timing diagram. Figure 10 It can be seen that the panel drive circuit can first receive a frame start signal from the start signal terminal STV, which can also be called a frame start pulse signal. Afterwards, the first timing control terminal GPIO1-1 and the first timing control terminal GPIO1-2 coupled respectively to the two first switch circuits 01, and the second timing control terminal GPIO2-1 and the second timing control terminal GPIO2-2 coupled respectively to the corresponding two third switch circuits 03, a total of four timing control terminals, can provide a first potential timing control signal in sequence according to the period of the frame start signal, that is, set high in sequence. Moreover, when any timing control terminal provides a high potential timing control signal, the other timing control terminals all provide low potential timing control signals. The duration for which any timing control terminal is set high at one time is approximately one frame scan time.

[0129] That is, combined Figure 10In other words, first, the first timing control terminal GPIO1-1 and the first timing control terminal GPIO1-2 provide the first timing control signal with a high potential in sequence; then, the second timing control terminal GPIO2-1 and the second timing control terminal GPIO2-2 provide the second timing control signal with a high potential in sequence.

[0130] Furthermore, when the first timing control terminal GPIO1-1 provides a high-voltage first timing control signal, the first timing control terminal GPIO1-2 can provide a low-voltage first timing control signal, and the two second timing control terminals GPIO2-1 and GPIO2-2 can both provide a low-voltage second timing control signal. Figure 7 , one N-type first switching transistor U1-1 can be turned on, while another N-type first switching transistor U1-2, as well as two N-type third switching transistors U3-1 and U3-2, can all be turned off. Accordingly, the pull-down power supply terminal V1 can be transmitted through the turned-on first switching transistor U1-1 to the gate of a correspondingly coupled P-type second switching transistor U2-1, causing the second switching transistor U2-1 to be turned on, while the remaining other P-type second switching transistor U2-2, as well as the two P-type fourth switching transistors U4-1 and U4-2, can all be reliably turned off by the driving power signal provided by their corresponding coupled driving power terminals. At this time, the first driving power terminal GMA1-1 coupled to the second switching transistor U2-1 can be transmitted to the signal output terminal Sout through the turned-on second switching transistor U2-1, while the first driving power signal provided by the remaining other first driving power terminal GMA1-2, and the second driving power signals provided by the two second driving power terminals GMA2-1 and GMA2-2, are not transmitted to the signal terminal Sout. That is, under this timing control, the panel driving circuit can transmit the first driving power signal provided by the first driving power terminal GMA1 - 1 to the polarization control panel through the signal output terminal Sout.

[0131] Similarly, when the first timing control terminal GPIO1-2 provides a high-voltage first timing control signal, the first timing control terminal GPIO1-1 can provide a low-voltage first timing control signal, and the two second timing control terminals GPIO2-1 and GPIO2-2 can both provide a low-voltage second timing control signal. Figure 7, one N-type first switching transistor U1-2 can be turned on, while another N-type first switching transistor U1-1, as well as two N-type third switching transistors U3-1 and U3-2, can all be turned off. Accordingly, the pull-down power supply terminal V1 can be transmitted to the gate of a correspondingly coupled P-type second switching transistor U2-2 via the turned-on first switching transistor U1-2, causing the second switching transistor U2-2 to be turned on, while the remaining P-type second switching transistor U2-1, as well as the two P-type fourth switching transistors U4-1 and U4-2, can all be reliably turned off by the driving power signal provided by their corresponding coupled driving power terminals. At this time, the first driving power terminal GMA1-2 coupled to the second switching transistor U2-2 can be transmitted to the signal output terminal Sout via the turned-on second switching transistor U2-2, while the first driving power signal provided by the remaining first driving power terminal GMA1-1, and the second driving power signals provided by the two second driving power terminals GMA2-1 and GMA2-2, are not transmitted to the signal terminal Sout. That is, under this timing control, the panel driving circuit can transmit the first driving power signal provided by the first driving power terminal GMA1 - 2 to the polarization control panel through the signal output terminal Sout.

[0132] When the second timing control terminal GPIO2-1 provides a high-voltage second timing control signal, the second timing control terminal GPIO2-2 can provide a low-voltage second timing control signal, and the two first timing control terminals GPIO1-1 and GPIO1-2 can both provide low-voltage first timing control signals. Figure 7, one N-type third switch transistor U3-1 can be turned on, while another N-type third switch transistor U3-2, as well as the two N-type first switch transistors U1-1 and U1-2, can be turned off. Accordingly, the pull-down power supply terminal V1 can be transmitted to the gate of a correspondingly coupled P-type fourth switch transistor U4-1 via the turned-on third switch transistor U3-1, causing the fourth switch transistor U4-1 to be turned on, while the remaining P-type fourth switch transistor U4-2, as well as the two P-type second switch transistors U2-1 and U2-2, can be reliably turned off by the drive power signal provided by their corresponding coupled drive power terminals. At this time, the second drive power terminal GMA2-1 coupled to the fourth switch transistor U4-1 can be transmitted to the signal output terminal Sout via the turned-on fourth switch transistor U4-1, while the second drive power signal provided by the remaining second drive power terminal GMA2-2, as well as the first drive power signals provided by the two first drive power terminals GMA1-1 and GMA1-2, are not transmitted to the signal terminal Sout. That is, under this timing control, the panel driving circuit can transmit the second driving power signal provided by the second driving power terminal GMA2 - 1 to the polarization control panel through the signal output terminal Sout.

[0133] When the second timing control terminal GPIO2-2 provides a high-voltage second timing control signal, the second timing control terminal GPIO2-1 can provide a low-voltage second timing control signal, and the two first timing control terminals GPIO1-1 and GPIO1-2 can both provide low-voltage first timing control signals. Figure 7, one N-type third switch transistor U3-2 can be turned on, while another N-type third switch transistor U3-1, as well as the two N-type first switch transistors U1-1 and U1-2, can all be turned off. Accordingly, the pull-down power supply terminal V1 can be transmitted via the turned-on third switch transistor U3-2 to the gate of a correspondingly coupled P-type fourth switch transistor U4-2, causing the fourth switch transistor U4-2 to be turned on, while the remaining P-type fourth switch transistor U4-1, as well as the two P-type second switch transistors U2-1 and U2-2, can be reliably turned off by the drive power signal provided by their corresponding coupled drive power terminals. At this point, the second drive power terminal GMA2-2 to which the fourth switch transistor U4-2 is coupled can be transmitted to the signal output terminal Sout via the turned-on fourth switch transistor U4-2, while the second drive power signal provided by the remaining second drive power terminal GMA2-1, as well as the first drive power signals provided by the two first drive power terminals GMA1-1 and GMA1-2, are not transmitted to the signal terminal Sout. That is, under this timing control, the panel driving circuit can transmit the second driving power signal provided by the second driving power terminal GMA2 - 2 to the polarization control panel through the signal output terminal Sout.

[0134] Assuming that, as described in the above embodiment, the polarities of the first driving power signal provided by the first driving power terminal GMA1-1 and the polarities of the second driving power signal provided by the second driving power terminal GMA2-1 are opposite, and both are used for the polarization control panel to convert the light emitted by the liquid crystal display panel into polarized light in the first direction X1; the polarities of the first driving power signal provided by the first driving power terminal GMA1-2 and the polarities of the second driving power signal provided by the second driving power terminal GMA2-2 are opposite, and both are used for the polarization control panel to convert the light emitted by the liquid crystal display panel into polarized light in the second direction X2, and assuming that the first driving power signals are both positive polarity and the second driving power signals are both negative polarity, then in combination Figure 11 It can be seen that in the above Figure 10Based on the timing control shown, the panel driver circuit can sequentially transmit a positive polarity first drive power signal, a positive polarity second drive power signal, a negative polarity first drive power signal, and a negative polarity second drive power signal to the polarization control panel via the signal output terminal Sout, so that the polarization control panel sequentially converts light emitted by the liquid crystal display panel into polarized light in two perpendicular directions, a first direction X1 and a second direction X2. The polarity of the drive power signal in response to each two adjacent conversions of polarized light in the first direction X1 is opposite, and the polarity of the drive power signal in response to each two adjacent conversions of polarized light in the second direction X1 is opposite. In this way, while preventing liquid crystal polarization, the panel driver circuit can form an electric field between the drive power signal transmitted via the signal output terminal Sout and the potential applied between the common electrode, controlling the deflection of the liquid crystal molecules, thereby modulating the polarization direction of the light emitted by the LCD panel to produce two linearly polarized light images with different polarization directions.

[0135] It should be noted that the above Figure 10 and Figure 11 This is only a schematic illustration of a timing control method described in the embodiment of the present disclosure. In specific scenarios, it can be combined with Figure 7 The circuit structure shown generates different driving timings through the signal output terminal Sout by changing the timing of the timing control signals provided by each timing control terminal and the driving power signals provided by each driving power terminal.

[0136] For example, for the timing control end, first, the first timing control end GPIO1-1 and the first timing control end GPIO1-2 may sequentially provide a high-potential second timing control signal; thereafter, the first timing control end GPIO1-1 and the first timing control end GPIO1-2 may sequentially provide a high-potential first timing control signal. For the driving power supply end, the first driving power supply signal provided by the first driving power supply end GMA1-1 and the second driving power supply signal provided by the second driving power supply end GMA2-1 may have opposite polarities and are both used for the polarization control panel to convert the light emitted by the liquid crystal display panel into polarized light in the second direction X2; the first driving power supply signal provided by the first driving power supply end GMA1-2 and the second driving power supply signal provided by the second driving power supply end GMA2-2 may have opposite polarities and are both used for the polarization control panel to convert the light emitted by the liquid crystal display panel into polarized light in the first direction.

[0137] In summary, the embodiments of the present disclosure provide a driving method for a panel driving circuit. In this method, each first switching circuit included in the panel driving circuit can control the on / off of the corresponding coupled pull-down power supply terminal and the control terminal of the second switching circuit based on the first timing control signal provided by the corresponding coupled first timing control terminal. The control terminal of each second switching circuit is also coupled to the first driving power supply terminal, and each second switching circuit can control the on / off of the corresponding coupled first driving power supply terminal and the signal output terminal based on the potential received by its control terminal. In addition, the signal output terminal is coupled to the polarization control panel in the display device. In this way, the first timing control signal can be flexibly set so that the first driving power supply terminal transmits the first driving power supply signal to the polarization control panel via the signal output terminal, so that the polarization control panel converts the light emitted by the liquid crystal display panel into polarized light with a polarization direction. The panel driving circuit has a simple structure and low cost, is convenient for mass production, and can facilitate the narrow frame design of the display device.

[0138] Figure 12 Schematic diagram of a display device provided by an embodiment of the present disclosure. Figure 12 As shown, the display device includes: a liquid crystal display LCD panel 10, a polarization control panel 20, and Figures 2 to 8 Any of the panel driving circuits 00 shown.

[0139] The panel driving circuit 00 is coupled to the polarization control panel 20 and is used to drive the polarization control panel 20 to control the deflection of the liquid crystal molecules included therein, so as to convert the light emitted by the liquid crystal display panel 10 into polarized light with a polarization direction. Figure 1 and Figure 12 It can be seen that the polarization control panel 20 can convert the light emitted by the LCD panel 10 into polarized light in a first direction X1 and a second direction X2 perpendicular to each other under the drive of the panel driving circuit 00. Figure 1 The 3D glasses shown separate the left and right eye parallax images, so that 3D images can be observed.

[0140] Optionally, the display device described in the embodiments of the present disclosure may include: an LCD device, a mobile phone, a tablet computer, a flexible display device, a television, a monitor, or any other product or component with a display function.

[0141] It should be noted that the terms used in the embodiments of the present disclosure are only used to explain the embodiments of the present disclosure and are not intended to limit the present disclosure. Unless otherwise defined, technical terms or scientific terms used in the embodiments of the present disclosure should have the common meanings understood by people with ordinary skills in the field to which the present disclosure belongs.

[0142] For example, the words "first", "second" or "third" and similar words used in the patent application specification and claims of this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components.

[0143] Likewise, the words “a” or “an” and the like do not denote a limitation of quantity, but rather denote the presence of at least one.

[0144] Words such as “include” or “comprising” mean that the elements or objects preceding “include” or “comprising” include the elements or objects listed after “include” or “comprising” and their equivalents, and do not exclude other elements or objects.

[0145] "Up," "down," "left," or "right" are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly. "Connected" or "coupled" refers to an electrical connection.

[0146] "And / or" indicates that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally indicates that the related objects are in an "or" relationship.

[0147] The above description is merely an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the scope of protection of the present disclosure.

Claims

1. A panel driving circuit for a display device, characterized in that: The display device includes: a liquid crystal display panel and a polarization control panel; the panel driving circuit includes: at least one first switch circuit and at least one second switch circuit corresponding to each other; The control terminal of the at least one first switch circuit is coupled to the at least one first timing control terminal in a one-to-one correspondence, the input terminal of each first switch circuit is coupled to the pull-down power terminal, the output terminal of each first switch circuit is coupled to the control terminal of a corresponding second switch circuit, and each first switch circuit is configured to control the on / off state of the pull-down power terminal and the control terminal of the coupled second switch circuit based on a first timing control signal provided by the coupled first timing control terminal; The control terminal and input terminal of the at least one second switch circuit are coupled to the at least one first driving power terminal in a one-to-one correspondence, the output terminal of each second switch circuit is coupled to the signal output terminal, and each second switch circuit is used to control the on / off of the coupled first driving power terminal and the signal output terminal based on the potential of the control terminal of each second switch circuit; the potential of the control terminal of each second switch circuit includes: the potential of the pull-down power signal provided by the pull-down power terminal or the potential of the first driving power signal provided by the first driving power terminal; The signal output terminal is used to couple with the polarization control panel, and the first driving power supply terminal provides a first driving power supply signal for the polarization control panel to control the deflection of the liquid crystal molecules included therein, so as to convert the light emitted by the liquid crystal display panel into polarized light having a polarization direction; The panel driving circuit further includes: a timing control circuit and a gamma circuit; The timing control circuit is coupled to the at least one first timing control terminal and is configured to provide a first timing control signal to each of the first timing control terminals; The gamma circuit is coupled to the at least one first driving power terminal and is configured to provide a first driving power signal to each of the first driving power terminals; The signal output terminal is further coupled to the reference power terminal and is used to receive a reference power signal provided by the reference power terminal, wherein the reference power signal is used for the polarization control panel to control the liquid crystal molecules included therein to not deflect; Furthermore, the panel driving circuit is integrated into the polarization control panel.

2. The panel driving circuit according to claim 1, wherein: The polarization direction includes: a first direction and a second direction perpendicular to each other; If the polarization control panel is used to convert the light emitted by the liquid crystal display panel into polarized light in the first direction by default, then the panel driving circuit includes: a first switching circuit and a second switching circuit, and the first driving power signal provided by the first driving power end coupled to the second switching circuit is used for the polarization control panel to convert the light emitted by the liquid crystal display panel into polarized light in the second direction; otherwise, the panel driving circuit includes: two first switching circuits and two second switching circuits, and the first driving power signals provided by the two first driving power ends correspondingly coupled to the two second switching circuits are respectively used for the polarization control panel to convert the light emitted by the liquid crystal display panel into polarized light in the first direction and polarized light in the second direction.

3. The panel driving circuit according to claim 1, wherein: The first switch circuit includes: a first switch transistor; the second switch circuit includes: a second switch transistor; The gate of the first switch transistor is coupled to the first timing control terminal, the first electrode of the first switch transistor is coupled to the pull-down power supply terminal, and the second electrode of the first switch transistor is coupled to the gate of the second switch transistor; The gate of the second switch transistor is further coupled to the first electrode of the second switch transistor, and the gate of the second switch transistor and the first electrode of the second switch transistor are both coupled to the first driving power supply terminal, and the second electrode of the second switch transistor is coupled to the signal output terminal; Furthermore, the first switching transistor and the second switching transistor are of different types.

4. The panel driving circuit according to claim 3, wherein: The first switch transistor is an N-type transistor; the second switch transistor is a P-type transistor.

5. The panel driving circuit according to any one of claims 1 to 4, characterized in that: The panel driving circuit further includes: at least one third switch circuit corresponding to the at least one first switch circuit in a one-to-one manner, and at least one fourth switch circuit corresponding to the at least one second switch circuit, and the at least one third switch circuit corresponds to the at least one fourth switch circuit in a one-to-one manner; The control terminal of the at least one third switch circuit is coupled to the at least one second timing control terminal in a one-to-one correspondence, the input terminal of each third switch circuit is coupled to the pull-down power terminal, the output terminal of each third switch circuit is coupled to the control terminal of a corresponding fourth switch circuit, and each third switch circuit is configured to control the on / off state of the pull-down power terminal and the control terminal of the coupled fourth switch circuit based on a second timing control signal provided by the coupled second timing control terminal; The control terminal and input terminal of the at least one fourth switch circuit are coupled to at least one second driving power terminal in a one-to-one correspondence, the output terminal of each fourth switch circuit is coupled to the signal output terminal, and each fourth switch circuit is used to control the on / off of the coupled second driving power terminal and the signal output terminal based on the potential of the control terminal of each fourth switch circuit; In which, the second driving power signal provided by the second driving power terminal coupled to each of the fourth switching circuits has opposite polarity to the first driving power signal provided by the first driving power terminal coupled to the corresponding second switching circuit, and both are used for the polarization control panel to convert the light emitted by the liquid crystal display panel into polarized light with the same polarization direction.

6. The panel driving circuit according to claim 5, wherein: The third switch circuit includes: a third switch transistor; the fourth switch circuit includes: a fourth switch transistor; The gate of the third switch transistor is coupled to the second timing control terminal, the first electrode of the third switch transistor is coupled to the pull-down power supply terminal, and the second electrode of the third switch transistor is coupled to the gate of the fourth switch transistor; The gate of the fourth switch transistor is further coupled to the first electrode of the fourth switch transistor, and the gate of the fourth switch transistor and the first electrode of the fourth switch transistor are both coupled to the second driving power supply terminal, and the second electrode of the fourth switch transistor is coupled to the signal output terminal; Furthermore, the third switching transistor and the fourth switching transistor are of different types.

7. The panel driving circuit according to claim 6, wherein: The third switch transistor is an N-type transistor; the fourth switch transistor is a P-type transistor.

8. The panel driving circuit according to claim 5, wherein: The panel driving circuit further includes: a first pull-up resistor connected in series between the output terminal of each first switch circuit and the control terminal of a corresponding second switch circuit; and a second pull-up resistor connected in series between the output terminal of each of the third switch circuits and the control terminal of a corresponding fourth switch circuit.

9. The panel driving circuit according to any one of claims 6 to 8, characterized in that: The timing control circuit is further coupled to the at least one second timing control terminal and is configured to provide a second timing control signal to each of the second timing control terminals; The gamma circuit is further coupled to the at least one second driving power terminal and is configured to provide a second driving power signal to each of the second driving power terminals.

10. The panel driving circuit according to any one of claims 1 to 4, or 6 to 8, characterized in that: The panel driving circuit further includes: a third pull-up resistor connected in series between the reference power supply terminal and the signal output terminal.

11. A driving method for a panel driving circuit, characterized in that: Applicable to the panel driving circuit according to any one of claims 1 to 10; the method comprises: In response to a frame start signal, at least one first timing control terminal sequentially provides a first timing control signal of a first potential, and at least one first switch circuit sequentially controls the pull-down power supply terminal and the control terminal of a second switch circuit coupled to at least one second switch circuit to conduct based on the first timing control signal of the first potential provided by the coupled first timing control terminal, so that the pull-down power supply terminal transmits a pull-down power supply signal to the control terminal of the second switch circuit, and the potential of the pull-down power supply signal is a second potential; For each of the second switch circuits, if the control terminal of the second switch circuit is conductively connected to the pull-down power terminal, the second switch circuit controls the coupled first driving power terminal and the signal output terminal to be disconnected based on the pull-down power signal; if the control terminal of the second switch circuit is not conductively connected to the pull-down power terminal, the second switch circuit controls the first driving power terminal and the signal output terminal to be conductively connected based on the first driving power signal provided by the first driving power terminal, so that the first driving power terminal transmits the first driving power signal to the signal output terminal; Among them, the signal output end is used to couple with the polarization control panel, and the first driving power signal provided by the first driving power end is used for the polarization control panel to control the deflection of the liquid crystal molecules included therein to convert the light emitted by the liquid crystal display panel into polarized light with a polarization direction.

12. The method according to claim 11, characterized in that The panel driving circuit further includes: at least one third switch circuit corresponding to the at least one first switch circuit, and at least one fourth switch circuit corresponding to the at least one second switch circuit, and the at least one third switch circuit corresponds to the at least one fourth switch circuit in a one-to-one manner; the method further includes: In response to the frame start signal, at least one second timing control terminal sequentially provides a second timing control signal of a first potential, and during the same time period, the potential of the second timing control signal is opposite to the potential of the first timing control signal, and the at least one third switch circuit sequentially controls the pull-down power supply terminal and the control terminal of the coupled fourth switch circuit to be conductive based on the second timing control signal of the first potential provided by the coupled second timing control terminal, so that the pull-down power supply terminal transmits the pull-down power supply signal to the control terminal of the fourth switch circuit; For each of the fourth switch circuits, if the control terminal of the fourth switch circuit is conductively connected to the pull-down power terminal, the fourth switch circuit controls the coupled second driving power terminal and the signal output terminal to be disconnected based on the pull-down power signal; if the control terminal of the fourth switch circuit is not conductively connected to the pull-down power terminal, the fourth switch circuit controls the second driving power terminal and the signal output terminal to be conductively connected based on the second driving power signal provided by the second driving power terminal, so that the second driving power terminal transmits the second driving power signal to the signal output terminal; In which, the second driving power signal provided by the second driving power terminal coupled to each of the fourth switching circuits has opposite polarity to the first driving power signal provided by the first driving power terminal coupled to the corresponding second switching circuit, and both are used for the polarization control panel to convert the light emitted by the liquid crystal display panel into polarized light with the same polarization direction.

13. A display device, characterized in that: The display device comprises: a liquid crystal display panel, a polarization control panel, and a panel driving circuit according to any one of claims 1 to 10; The panel driving circuit is coupled to the polarization control panel and is used to drive the polarization control panel to control the deflection of liquid crystal molecules included therein, so as to convert the light emitted by the liquid crystal display panel into polarized light with a polarization direction.

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