CN210984236U - Power supply mode selection circuit, flexible circuit board and display device - Google Patents
Power supply mode selection circuit, flexible circuit board and display device Download PDFInfo
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- CN210984236U CN210984236U CN201922228882.8U CN201922228882U CN210984236U CN 210984236 U CN210984236 U CN 210984236U CN 201922228882 U CN201922228882 U CN 201922228882U CN 210984236 U CN210984236 U CN 210984236U
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Abstract
The utility model discloses a power supply mode selection circuit, flexible circuit board and display device, power supply mode selection circuit includes: the voltage detection unit is used for outputting one of a first control signal and a second control signal according to the voltage value of the analog voltage; the power supply unit is used for outputting a first positive source voltage and a first negative source voltage according to the analog voltage; the voltage selection unit is used for selecting different positive/negative source voltage outputs according to the first control signal or the second control signal; the protection unit is used for connecting or disconnecting a transmission path from the analog voltage to the power supply unit; and a mode switching unit. The automatic switching of different power supply modes can be realized, the reset resistor is not needed, and the time and the human resources are saved.
Description
Technical Field
The utility model relates to an integrated circuit field, concretely relates to power supply mode selection circuit, flexible circuit board and display device.
Background
In some small-sized display Array designs, in order to stabilize a gate driver Array (GIA) and considering the standby capacity of a driver chip, the power supply mode of the designed driver chip is generally a default three-voltage input mode (3power, hereinafter referred to as a second power supply mode) while a two-voltage input mode (2power, hereinafter referred to as a first power supply mode) is reserved.
Fig. 1 is a schematic view showing a structure of a conventional display device. As shown in fig. 1, the conventional display device includes a display panel 110, a Flexible Printed Circuit (FPC) 120, an interposer 130, and a jig 140. The display panel 110 is provided with a driving chip for providing a driving signal and a data signal to the display panel 110 to make the display panel display an image or video. One end of the flexible circuit board 120 is connected to the display panel 110, and the other end is connected to the interposer 130. The adapter plate 130 is configured to receive a plurality of power supply voltages (including an analog voltage VCI, a digital voltage IOVCC, a positive source voltage VSP, and a negative source voltage VSN), and transmit the plurality of power supply voltages to the display panel 110 in different power supply modes through the connection lines disposed thereon, the mode switching unit 121 and the power supply unit 122 disposed on the flexible circuit board 120, so as to operate the display device.
Fig. 2(a) and 2(b) respectively show two power supply modes of the display device in fig. 1. Fig. 2(a) shows a schematic structural diagram of the display device operating in a first power supply mode, i.e., a 2power mode. In this mode, the jig 140 outputs an analog voltage VCI and a digital voltage IOVCC, and the analog voltage VCI generates a positive source voltage VSP and a negative source voltage VSN under the action of the power supply unit. Fig. 2(b)) shows a schematic structural diagram of the display device operating in the second power supply mode, i.e., the 3power mode. In this mode, the jig 140 outputs the digital voltage IOVCC, the positive source voltage VSP, and the negative source voltage VSN, and at this time, the analog voltage VCI pin of the display panel 110 is connected to the positive source voltage VSP on the flexible circuit board 120, specifically, an ohmic resistor is used for reservation during design.
If switching between the first power supply mode and the second power supply mode needs to be carried out, the reset resistor needs to be used, time and labor are wasted, and the verification progress of a product is influenced.
Therefore, there is a need to provide an improved technical solution to overcome the above technical problems in the prior art.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a power supply mode selection circuit, flexible circuit board and display device can realize the automatic switch-over of different power supply modes, need not to use reset resistance, has saved time and manpower resources.
According to the utility model provides a pair of power supply mode selection circuit, include: the voltage detection unit is used for collecting analog voltage and outputting one of a first control signal and a second control signal according to the voltage value of the analog voltage; the power supply unit is used for receiving an analog voltage and outputting a first positive source voltage and a first negative source voltage according to the analog voltage; the voltage selection unit is connected with the voltage detection unit and the power supply unit and used for receiving the first control signal to output the first positive source voltage and the first negative source voltage or receiving the second control signal to output the second positive source voltage and the second negative source voltage; the protection unit is connected with the voltage detection unit and the power supply unit and used for receiving the first control signal or the second control signal so as to connect or disconnect a transmission path from the analog voltage to the power supply unit; and the mode switching unit is connected with the voltage detection unit and used for receiving one of the first control signal and the second control signal so as to realize switching display of different power supply modes.
Preferably, the voltage detection unit includes: the negative pole of the voltage source is grounded and is used for providing reference voltage; the positive-phase input end of the comparator is connected with the positive electrode of the voltage source through a second resistor, the negative-phase input end of the comparator is connected with the analog voltage input end through a first resistor, the power supply end of the comparator is respectively connected with the positive voltage source input end and the negative voltage source input end, and the output end of the comparator is used for outputting one of the first control signal and the second control signal according to the reference voltage and the analog voltage; and a third resistor connected in series between the positive voltage source input terminal and the output terminal of the comparator.
Preferably, the voltage selection unit includes: a grid of the first switch tube is connected with the output end of the voltage detection unit, a first path end is grounded through a fourth resistor, and a second path end is connected with a first positive source voltage input end; a grid of the second switch tube is connected with the output end of the voltage detection unit, the first path end is grounded through the fourth resistor, and the second path end is connected with the second positive source voltage input end; a grid of the third switching tube is connected with the output end of the voltage detection unit, the first path end is grounded through a fifth resistor, and the second path end is connected with the first negative source voltage input end; and the grid electrode of the fourth switching tube is connected with the output end of the voltage detection unit, the first path end is grounded through the fifth resistor, and the second path end is connected with the voltage input end of the second negative source electrode.
Preferably, the first switching tube and the third switching tube are NMOS transistors, and the second switching tube and the fourth switching tube are PMOS transistors.
Preferably, the protection circuit includes: and a grid electrode of the seventh switching tube is connected with the output end of the voltage detection unit, the first path end is connected through an analog voltage input end, and the second path end is grounded through an eighth resistor.
Preferably, the seventh switching tube is an NMOS transistor.
Preferably, the mode switching unit includes: a grid of the fifth switching tube is connected with the output end of the voltage detection unit, the first path end is grounded through a sixth resistor, and the second path end is connected with the digital voltage input end; and the grid electrode of the sixth switching tube is connected with the output end of the voltage detection unit, the first path end is grounded through a seventh resistor, and the second path end is connected with the digital voltage input end.
Preferably, the fifth switching tube is an NMOS transistor, and the sixth switching tube is a PMOS transistor.
According to the utility model provides a pair of flexible circuit board, include: the power supply mode selection circuit is used for judging the power supply mode according to the analog voltage and selecting different positive source voltage and negative source voltage to output according to the corresponding power supply mode.
According to the utility model provides a pair of display device, include: a display panel for displaying image data according to the driving signal; one end of the flexible circuit board is fixedly connected with the display panel and used for judging a power supply mode according to the analog voltage and selecting different positive source voltage and negative source voltage to output according to the corresponding power supply mode; the output end of the adapter plate is connected with the other end of the flexible circuit board, and the input end of the adapter plate receives a plurality of power supply voltages and is used for outputting the plurality of power supply voltages to the flexible circuit board; and the jig is connected with the input end of the adapter plate and provides the plurality of power supply voltages, wherein the plurality of power supply voltages comprise analog voltage, second positive source voltage, second negative source voltage and digital voltage.
The utility model has the advantages that: the utility model discloses set up power supply mode selection circuit on flexible circuit board, through the magnitude of voltage of comparison analog voltage and threshold voltage, can listen display device's power supply mode, and then select different power supply unit in order to provide the required positive and negative source voltage of display device according to the comparative result, realize different power supply mode's automatic switch-over.
And a protection circuit is also arranged, so that the power supply chip is prevented from being burnt out due to the rise of the analog voltage when the power supply mode is switched.
The utility model discloses a power supply mode selection circuit need not to use reset resistor, has saved time and manpower resources, also makes the function of circuit board more powerful.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings.
Fig. 1 is a schematic view showing a structure of a conventional display device;
FIGS. 2(a) and 2(b) are schematic diagrams illustrating two power supply modes of the display device of FIG. 1, respectively;
fig. 3 is a schematic structural diagram of a display device according to an embodiment of the present invention;
fig. 4 is a circuit diagram of a power supply mode selection circuit according to an embodiment of the present invention.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The present invention will be described in detail below with reference to the accompanying drawings.
Fig. 3 is a schematic structural diagram of a display device according to an embodiment of the present invention.
As shown in fig. 3, in the present embodiment, the display device includes: the display device includes a display panel 210, a flexible circuit board 220, an interposer 230, and a jig 240.
The display panel 210 displays image data according to a driving signal.
Further, the display panel 210 is provided with a driving chip, and the driving chip is configured to provide a driving signal according to a plurality of power supply voltages and a dc regulation voltage.
The driving chip causes the display panel 210 to display an image or a video by applying a driving signal and a data signal to the display panel 210. A driving chip of a display device such as a mobile phone typically includes a Source Driver (Source Driver) and a Gate Driver (Gate Driver). The source driver may provide a data signal corresponding to an image to a target pixel included in the display panel 210 in order to display the image on the display panel. At this time, the Source driver may generate the data signal by receiving a Positive Source Voltage (Positive Source Voltage) and a Negative Source Voltage (Negative Source Voltage) from the power supply device.
Preferably, the display device further needs the following power supply voltage when performing data processing: one is an analog voltage VCI (about 2.8V) for the supply of the system; one is a digital voltage IOVCC (about 1.8V) for data transfer; one is a dc regulated voltage for stabilizing the gate drive array.
One end of the flexible circuit board 220 is fixedly connected to the display panel 210, and is configured to determine a power supply mode according to the analog voltage, and select different positive source voltages and negative source voltages according to the corresponding power supply mode for output.
In this embodiment, a power supply mode selection circuit is disposed on the flexible circuit board 220, and the power supply mode selection circuit includes a voltage detection unit 221, a voltage selection unit 222, a protection unit 223, a mode switching unit 224, and a power supply unit 225.
The voltage detecting unit 221 is respectively connected to the voltage selecting unit 222, the protecting unit 223, the mode switching unit 224, and the power supply unit 225, and is configured to collect the analog voltage VCI and output one of the first control signal and the second control signal according to a voltage value of the analog voltage VCI.
The voltage selection unit 222 is connected to the power supply unit 225, and is configured to receive a first control signal to output the first positive source voltage VSP1 and the first negative source voltage VSN1 to the display panel 210, or receive a second control signal to output the second positive source voltage VSP2 and the second negative source voltage VSN2 to the display panel 210.
The protection unit 223 is connected to the power supply unit 225 for receiving one of the first control signal and the second control signal to connect or disconnect an input path of the power supply unit 225.
The mode switching unit 224 is configured to receive one of the first control signal and the second control signal to implement switching display of different power supply modes.
The power supply unit 250 is configured to receive the analog voltage VCI and output a first positive source voltage VSP1 and a first negative source voltage VSN1 according to the analog voltage VCI.
The flexible circuit board 220 and the display panel 210 are fixedly connected by the process of fog (flexible On glass), that is, the flexible circuit board 220 is directly fixed On the electrode at the edge of the liquid crystal glass of the display panel 210, so that the rapid heating, rapid cooling, accurate temperature control and the like can be realized.
The output end of the adapter plate 230 is connected to the other end of the flexible circuit board 220, and the input end receives a plurality of power supply voltages for outputting the plurality of power supply voltages to the flexible circuit board.
The input end of the flexible circuit board 220 may be configured as a pluggable plug structure, and the electrical connection between the input end of the flexible circuit board 220 and the output end of the interposer 230 is realized through the pluggable plug structure.
The fixture 240 is connected to the input terminal of the interposer 230 for providing a plurality of power supply voltages.
Further, the plurality of supply voltages includes: an analog voltage VCI, a digital voltage IOVCC, a second positive source voltage VSP2, and a second negative source voltage VSN 2.
Fig. 4 is a circuit diagram of a power supply mode selection circuit according to an embodiment of the present invention.
As shown in fig. 4, the voltage detecting unit 221 includes a voltage source V1, a first resistor R1, a second resistor R2, a third resistor R3, and a comparator U1. The non-inverting input terminal of the comparator U1 is connected to the positive terminal of the voltage source V1 through the second resistor R2, and the negative terminal of the voltage source V1 is grounded. The inverting input end of the comparator U1 is connected with the input end of the analog voltage VCI through a first resistor R1, the power supply end of the comparator U1 is respectively connected with the positive voltage source VDD input end and the negative voltage source VEE input end, and a third resistor R3 is further connected between the positive voltage source VDD input end and the output end of the comparator U1.
It will be appreciated that, to facilitate verification of circuit feasibility, the switch S1 and the first and second analog voltage VCI _1 inputs respectively connected to the switch S1 may be substituted for the analog voltage VCI input. Wherein the switch S1 is a single-pole double-throw switch.
The first analog voltage VCI corresponds to an analog voltage output in the first power supply mode, such as 2.8V, and the second analog voltage VCI _1 corresponds to an analog voltage output in the second power supply mode, at this time, the analog voltage is connected to the positive source voltage VSP, such as 5.5V.
When the switch S1 is connected to the first analog voltage VCI input terminal, it indicates that the voltage of the analog voltage VCI is, for example, 2.8V in the first power supply mode, and when the switch S1 is connected to the second analog voltage VCI _1 input terminal, it indicates that the voltage of the analog voltage VCI is, for example, 5.5V in the second power supply mode.
Further, the voltage source V1 is used to provide a reference voltage having a voltage value between the first analog voltage VCI and the second analog voltage VCI _1, such as 4V.
The voltage selection unit 222 includes a first switch tube Q1, a second switch tube Q2, a third switch tube Q3, a fourth switch tube Q4, a fourth resistor R4 and a fifth resistor R5. The gate of the first switch Q1 is connected to the output terminal of the voltage detection unit 221, i.e., the output terminal of the comparator U1, the first path of the first switch Q1 is grounded through the fourth resistor R4, and the second path is connected to the input terminal of the first positive source voltage VSP 1. The gate of the second switch Q2 is connected to the output terminal of the voltage detection unit 221, i.e., the output terminal of the comparator U1, the first path of the second switch Q2 is grounded through the fourth resistor R4, and the second path is connected to the input terminal of the second positive source voltage VSP 2. The gate of the third switch Q3 is connected to the output terminal of the voltage detection unit 221, i.e., the output terminal of the comparator U1, the first path terminal of the third switch Q3 is grounded through the fifth resistor R5, and the second path terminal is connected to the input terminal of the first negative source voltage VSN 1. The gate of the fourth switching tube Q4 is connected to the output terminal of the voltage detection unit 221, i.e., the output terminal of the comparator U1, the first path terminal of the fourth switching tube Q4 is grounded through the fifth resistor R5, and the second path terminal is connected to the input terminal of the second negative source voltage VSN 2.
Referring to FIG. 3, the first positive source voltage VSP1 input and the first negative source voltage VSN1 input are respectively connected to the power supply unit 225, indicating that the first positive source voltage VSP1 and the first negative source voltage VSN1 are output by the power supply unit 225. The input end of the second positive source voltage VSP2 and the input end of the second negative source voltage VSN2 are respectively connected to the jig 240, which indicates that the jig 240 outputs the second positive source voltage VSP2 and the second negative source voltage VSN 2.
The first switch tube Q1 is of the opposite channel type to the second switch tube Q2. In this embodiment, the first switch transistor Q1 is an NMOS transistor, and the second switch transistor Q2 is a PMOS transistor.
The channel type of the third switch tube Q3 is opposite to that of the fourth switch tube Q4. In this embodiment, the third transistor Q3 is an NMOS transistor, and the fourth transistor Q4 is a PMOS transistor.
In fig. 4, the fourth resistor R4 represents the load of the display panel 210. When the switch tube Q1 or Q2 is turned on, it indicates that the corresponding input voltage is provided to the positive source voltage input terminal of the display panel 210. Similarly, the fifth resistor R5 also represents the load of the display panel 210. When the switch tube Q3 or Q4 is turned on, it indicates that the corresponding input voltage is provided to the negative source voltage input terminal of the display panel 210.
The protection unit 223 includes a seventh switching tube Q7 and an eighth resistor R8. The gate of the seventh switch Q7 is connected to the output terminal of the voltage detection unit 221, i.e., the output terminal of the comparator U1, the first path terminal is connected to the input terminal of the first analog voltage VCI or the input terminal of the second analog voltage VCI _1 through the switch S1, and the second path terminal is grounded through the eighth resistor R8.
In this embodiment, the seventh switch Q7 is an NMOS transistor.
In fig. 4, the eighth resistor R8 represents the load of the power supply unit 225. When the switching tube Q7 is turned on, it indicates that the analog voltage VCI is provided to the input terminal of the power supply unit 225, so that the power supply unit 225 is boosted to obtain corresponding positive and negative source voltages according to the analog voltage VCI.
The mode switching unit 224 includes a fifth switching tube Q5, a sixth switching tube Q6, a sixth resistor R6 and a seventh resistor R7. The gate of the fifth switch Q5 is connected to the output terminal of the voltage detection unit 221, i.e., the output terminal of the comparator U1, the first path terminal of the fifth switch Q5 is grounded through the sixth resistor R6, and the second path terminal is connected to the input terminal of the digital voltage IOVCC. The gate of the sixth switch Q6 is connected to the output terminal of the voltage detection unit 221, i.e., the output terminal of the comparator U1, the first path of the sixth switch Q6 is grounded through the seventh resistor R7, and the second path is connected to the input terminal of the digital voltage IOVCC.
The channel type of the fifth switch tube Q5 is opposite to that of the sixth switch tube Q6. In this embodiment, the fifth switch Q5 is an NMOS transistor, and the sixth switch Q6 is a PMOS transistor.
In this embodiment, the sixth resistor R6 and the seventh resistor R7 correspond to loads of different status indication units, respectively. When the switch tube Q5 correspondingly connected with the sixth resistor R6 is turned on, the state indicating unit is powered up, and the power supply mode of the display device at the moment is correspondingly displayed as the first power supply mode; when the switch tube Q6 connected to the seventh resistor R7 is turned on, the state indicating unit is powered up, and the power supply mode of the display device at this time is correspondingly displayed as the second power supply mode.
Further, the status indication unit is a status indicator light, a display screen or display data displayed corresponding to the status.
In another preferred embodiment of the present invention, the mode switching unit 224 can be controlled by software.
When the display panel is in operation, if the voltage at the input terminal of the analog voltage VCI is a voltage of, for example, 2.8V in the first power supply mode, the voltage at the non-inverting input terminal of the comparator U1 is greater than the voltage at the inverting input terminal, and the comparator U1 outputs a high-level signal, i.e., a first control signal. The high level signal controls the first switch tube Q1 and the third switch tube Q3 to be turned on, so as to provide the first positive source voltage VSP1 and the first negative source voltage VSN1 outputted by the power unit 225 to the display panel 210. Meanwhile, the high level signal controls the seventh switch Q7 to be turned on, so as to provide the analog voltage VCI of, for example, 2.8V to the power supply unit 225.
When the first switching tube Q1 and the third switching tube Q3 are turned on, the second switching tube Q2 and the fourth switching tube Q4 are turned off.
Further, the high level signal also controls the fifth switching tube Q5 to be turned on, and the sixth switching tube Q6 is turned off, so as to output the digital voltage IOVCC through the fifth switching tube Q5, which indicates that the power supply mode of the display device is the first power supply mode at this time.
If the voltage at the input terminal of the analog voltage VCI is 5.5V in the second power supply mode, the voltage at the non-inverting input terminal of the comparator U1 is lower than the voltage at the inverting input terminal, and the comparator U1 outputs a low level signal, i.e., the second control signal. The low level signal controls the second switch tube Q2 and the fourth switch tube Q4 to be turned on, so as to provide the second positive source voltage VSP2 and the second negative source voltage VSN2 outputted by the fixture 240 to the display panel 210. Meanwhile, the high level signal controls the seventh switch tube Q7 to turn off, and the analog voltage VCI of 5.5V is not provided to the power supply unit 225, so as to protect the power supply chip corresponding to the power supply unit 225 from being burned out.
When the second switching tube Q2 and the fourth switching tube Q4 are turned on, the first switching tube Q1 and the third switching tube Q3 are turned off.
Further, the low level signal also controls the fifth switching tube Q5 to turn off, and the sixth switching tube Q6 to turn on, so as to output the digital voltage IOVCC through the sixth switching tube Q6, which indicates that the power supply mode of the display device is the second power supply mode at this time.
The utility model discloses set up power supply mode selection circuit on flexible circuit board, through the magnitude of voltage of comparison analog voltage and threshold voltage, can listen display device's power supply mode, and then select different power supply unit in order to provide the required positive and negative source voltage of display device according to the comparative result, realize different power supply mode's automatic switch-over.
And a protection circuit is also arranged, so that the power supply chip is prevented from being burnt out due to the rise of the analog voltage when the power supply mode is switched.
The utility model discloses a power supply mode selection circuit need not to use reset resistor, has saved time and manpower resources, also makes the function of circuit board more powerful.
It should be noted that, in this document, the contained terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Finally, it should be noted that: it should be understood that the above examples are only for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious changes and modifications may be made without departing from the scope of the present invention.
Claims (10)
1. A power supply mode selection circuit, comprising:
the voltage detection unit is used for collecting analog voltage and outputting one of a first control signal and a second control signal according to the voltage value of the analog voltage;
the power supply unit is used for receiving an analog voltage and outputting a first positive source voltage and a first negative source voltage according to the analog voltage;
the voltage selection unit is connected with the voltage detection unit and the power supply unit and used for receiving the first control signal to output the first positive source voltage and the first negative source voltage or receiving the second control signal to output the second positive source voltage and the second negative source voltage;
the protection unit is connected with the voltage detection unit and the power supply unit and used for receiving the first control signal or the second control signal so as to connect or disconnect a transmission path from the analog voltage to the power supply unit; and
and the mode switching unit is connected with the voltage detection unit and used for receiving one of the first control signal and the second control signal so as to realize switching display of different power supply modes.
2. The power supply mode selection circuit of claim 1, wherein the voltage detection unit comprises:
the negative pole of the voltage source is grounded and is used for providing reference voltage;
the positive-phase input end of the comparator is connected with the positive electrode of the voltage source through a second resistor, the negative-phase input end of the comparator is connected with the analog voltage input end through a first resistor, the power supply end of the comparator is respectively connected with the positive voltage source input end and the negative voltage source input end, and the output end of the comparator is used for outputting one of the first control signal and the second control signal according to the reference voltage and the analog voltage; and
a third resistor connected in series between the positive voltage source input and the output of the comparator.
3. The power supply mode selection circuit of claim 1, wherein the voltage selection unit comprises:
a grid of the first switch tube is connected with the output end of the voltage detection unit, a first path end is grounded through a fourth resistor, and a second path end is connected with a first positive source voltage input end;
a grid of the second switch tube is connected with the output end of the voltage detection unit, the first path end is grounded through the fourth resistor, and the second path end is connected with the second positive source voltage input end;
a grid of the third switching tube is connected with the output end of the voltage detection unit, the first path end is grounded through a fifth resistor, and the second path end is connected with the first negative source voltage input end; and
and the grid electrode of the fourth switching tube is connected with the output end of the voltage detection unit, the first path end is grounded through the fifth resistor, and the second path end is connected with the voltage input end of the second negative source electrode.
4. The power supply mode selection circuit of claim 3, wherein the first switch tube and the third switch tube are NMOS transistors, and the second switch tube and the fourth switch tube are PMOS transistors.
5. The power supply mode selection circuit of claim 1, wherein the protection unit comprises:
and a grid electrode of the seventh switching tube is connected with the output end of the voltage detection unit, the first path end is connected through an analog voltage input end, and the second path end is grounded through an eighth resistor.
6. The power supply mode selection circuit of claim 5, wherein the seventh switch transistor is an NMOS transistor.
7. The power supply mode selection circuit according to claim 1, wherein the mode switching unit includes:
a grid of the fifth switching tube is connected with the output end of the voltage detection unit, the first path end is grounded through a sixth resistor, and the second path end is connected with the digital voltage input end; and
and the grid of the sixth switching tube is connected with the output end of the voltage detection unit, the first path end is grounded through a seventh resistor, and the second path end is connected with the digital voltage input end.
8. The power supply mode selection circuit of claim 7, wherein the fifth switch transistor is an NMOS transistor and the sixth switch transistor is a PMOS transistor.
9. A flexible circuit board, wherein integrated on said flexible circuit board are:
the power supply mode selection circuit of any one of claims 1 to 8, configured to determine a power supply mode according to the analog voltage, and select different positive and negative source voltage outputs according to the corresponding power supply mode.
10. A display device, comprising:
a display panel for displaying image data according to the driving signal;
the flexible circuit board of claim 9, wherein one end of the flexible circuit board is fixedly connected to the display panel, and is used for determining a power supply mode according to the analog voltage and selecting different positive source voltages and negative source voltages to output according to the corresponding power supply mode;
the output end of the adapter plate is connected with the other end of the flexible circuit board, and the input end of the adapter plate receives a plurality of power supply voltages and is used for outputting the plurality of power supply voltages to the flexible circuit board; and
the jig is connected with the input end of the adapter plate and provides the plurality of power supply voltages, wherein the plurality of power supply voltages comprise analog voltages, second positive source voltages, second negative source voltages and digital voltages.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112863456A (en) * | 2021-03-02 | 2021-05-28 | 重庆先进光电显示技术研究院 | Display module, gamma voltage adjusting method of display module and display device |
| CN113342105A (en) * | 2021-06-03 | 2021-09-03 | 昆山国显光电有限公司 | Power supply adjusting device and method of display panel and display device |
| CN114203122A (en) * | 2021-11-30 | 2022-03-18 | 维沃移动通信有限公司 | Driving circuit, electronic device and driving method of display screen |
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2019
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112863456A (en) * | 2021-03-02 | 2021-05-28 | 重庆先进光电显示技术研究院 | Display module, gamma voltage adjusting method of display module and display device |
| CN113342105A (en) * | 2021-06-03 | 2021-09-03 | 昆山国显光电有限公司 | Power supply adjusting device and method of display panel and display device |
| CN113342105B (en) * | 2021-06-03 | 2022-11-11 | 昆山国显光电有限公司 | Power supply adjusting device and method of display panel and display device |
| CN114203122A (en) * | 2021-11-30 | 2022-03-18 | 维沃移动通信有限公司 | Driving circuit, electronic device and driving method of display screen |
| CN114203122B (en) * | 2021-11-30 | 2023-03-14 | 维沃移动通信有限公司 | Driving circuit, electronic device and driving method of display screen |
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