CN210575025U - Power supply circuit of display panel - Google Patents
Power supply circuit of display panel Download PDFInfo
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- CN210575025U CN210575025U CN201922218570.9U CN201922218570U CN210575025U CN 210575025 U CN210575025 U CN 210575025U CN 201922218570 U CN201922218570 U CN 201922218570U CN 210575025 U CN210575025 U CN 210575025U
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- switch control
- display panel
- control circuit
- controller
- power supply
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Abstract
The embodiment of the utility model discloses display panel's supply circuit, this circuit includes: the display device comprises a controller, M power management modules, M switch control circuits and a display panel to be tested, wherein the controller is at least provided with M first signal output ends and M second signal output ends, and M is a positive integer greater than or equal to 2; each first signal output end of the controller is electrically connected with a corresponding power supply management module, each second signal output end of the controller is electrically connected with a corresponding control end of a switch control circuit, each power supply management module is electrically connected with a corresponding voltage input end of the switch control circuit, and the voltage output end of each switch control circuit is electrically connected with the voltage input end of the display panel to be tested, wherein the switch control circuit is used for outputting the voltage input by the voltage input end from the voltage output end according to the signal of the control end, so that the effect of simultaneously controlling the voltage input of a plurality of display panels through a single controller is realized.
Description
Technical Field
The embodiment of the utility model provides a relate to display panel test technique, especially relate to a display panel's supply circuit.
Background
The display panel needs to be subjected to related performance tests before leaving a factory, and the conditions of the power supply for testing required by the test requirements of different display panels are different during testing. Therefore, the power supply circuit for testing is an important condition for completing the testing of the display panel.
Generally, an inspection machine is used to light up a display panel to be inspected and provide a test voltage to the display panel. Although this approach can meet the power supply requirements, it still has disadvantages: a single checking machine can only supply power for one display panel at a time, the testing time is long, the time sequence is prolonged, and the working efficiency is low.
SUMMERY OF THE UTILITY MODEL
The utility model provides a display panel's supply circuit to the realization can control a plurality of display panel's voltage input simultaneously through single controller.
The embodiment of the utility model provides a display panel's supply circuit, this circuit includes: the display device comprises a controller, M power management modules, M switch control circuits and a display panel to be tested, wherein the controller is at least provided with M first signal output ends and M second signal output ends, and M is a positive integer greater than or equal to 2; each first signal output end of the controller is correspondingly and electrically connected with a power supply management module, each second signal output end of the controller is correspondingly and electrically connected with a control end of a switch control circuit, each power supply management module is correspondingly and electrically connected with a voltage input end of a switch control circuit, the voltage output end of each switch control circuit is electrically connected with the voltage input end of the display panel to be tested, and the switch control circuit is used for outputting the voltage input by the voltage input end from the voltage output end according to the signal of the control end.
Optionally, the switch control circuit includes a first MOS transistor, a second MOS transistor, a first resistor, a second resistor, and a third resistor, a gate of the first MOS transistor is connected to a second signal output terminal of a controller, a first pole of the first MOS transistor is grounded, a second pole of the first MOS transistor is connected to a gate of the second MOS transistor, a first end of the first resistor is connected to the gate of the first MOS transistor, a second end of the first resistor is connected to the first pole of the first MOS transistor, the first pole of the second MOS transistor is connected to a power management module, the power management module is further connected to the gate of the second MOS transistor through the second resistor, a second pole of the second MOS transistor is grounded through the third resistor, and the second pole of the second MOS transistor is further electrically connected to a voltage input terminal of the display panel to be tested.
Optionally, the switch control circuit further includes a fourth resistor, and a control end of the switch control circuit is connected to the gate of the first MOS transistor through the fourth resistor.
Optionally, the first MOS transistor is an NPN-type MOS transistor, and the second MOS transistor is a PNP-type MOS transistor.
Optionally, the switch control circuit further includes at least one first capacitor, a first end of the first capacitor is connected to the voltage output end of the switch control circuit, and a second end of the first capacitor is grounded.
The utility model provides a power supply circuit of a display panel, which comprises a controller, M power supply management modules, M switch control circuits and a display panel to be tested, wherein the controller is at least provided with M first signal output ends and M second signal output ends, and M is a positive integer more than or equal to 2; every first signal output end of the controller is electrically connected with a power supply management module correspondingly, every second signal output end of the controller is electrically connected with a control end of a switch control circuit correspondingly, every power supply management module is electrically connected with a voltage input end of a switch control circuit correspondingly, and the voltage output end of each switch control circuit is electrically connected with the voltage input end of a display panel to be tested, wherein the switch control circuit is used for outputting the voltage input by the voltage input end from the voltage output end according to the signal of the control end.
Drawings
Fig. 1 is a control block diagram of a power supply circuit of a display panel according to a first embodiment of the present invention;
fig. 2 is a circuit diagram of a power supply circuit of a display panel according to a second embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a control block diagram of a power supply circuit of a display panel according to an embodiment of the present invention, referring to fig. 1, the circuit includes: the controller 110, M power management modules, M switch control circuits, and the display panel to be tested, wherein the controller 110 is at least provided with M first signal output terminals and M second signal output terminals, M is a positive integer greater than or equal to 2, referring to fig. 1, an exemplary power supply circuit for the display panel includes 2 power management modules and 2 switch control circuits, specifically, the power supply circuit for the display panel includes a first power management module 310, a second power management module 320, a first switch control circuit 210 and a second switch control circuit 220, the controller 110 includes a first a signal output terminal a1, a first B signal output terminal a2, a second a signal output terminal B1 and a second B signal output terminal B2, the first a signal output terminal a1 of the controller 110 is electrically connected to the first power management module 310, the second a signal output terminal B1 of the controller 110 is electrically connected to a control terminal of the first switch control circuit 210, the first power management module 310 is electrically connected to a voltage input terminal of the first switch control circuit 210, a voltage output terminal of the first switch control circuit 210 is used for being electrically connected to a voltage input terminal of the first display panel 410 to be tested, and a voltage output terminal of the switch control circuit can be electrically connected to one or more display panels to be tested, where a case that the voltage output terminal of the switch control circuit 210 is connected to one display panel 410 to be tested is given as an example, the number of specific display panels can be configured according to a specific power supply configuration requirement, and is not specifically limited herein; similarly, the first second signal output end a2 of the controller 110 is electrically connected to the second power management module 320, the second signal output end B2 of the controller 110 is electrically connected to the control end of the second switch control circuit 220, the second power management module 320 is electrically connected to the voltage input end of the second switch control circuit 220, the voltage output end of the second switch control circuit 220 is respectively used for electrically connecting to the voltage input ends of the second to-be-tested display panel 420, the third to-be-tested display panel 430, and the fourth to-be-tested display panel 440, where only the voltage output end of the exemplary given switch control circuit 220 is respectively connected to the three to-be-tested display panels, and meanwhile, a test voltage is provided to the three to-be-tested display panels, and the number of the specific display panels may be configured according to specific power supply configuration requirements, which is not specifically limited herein; the switch control circuit is used for outputting the voltage input by the voltage input end from the voltage output end according to the signal of the control end.
The controller can adopt a control chip with a control function, such as a single chip microcomputer, an FPGA, a DSP and the like, and the power management module can adopt a power management chip. In other embodiments of the present invention, there may be three or more power management modules and switch control circuits, which are not listed here.
In the technical solution of this embodiment, the implementation process of the power supply circuit of the display panel is as follows: for example, referring to fig. 1, the power management module is required to provide a power supply voltage for the display panel to be tested when the display panel to be tested is tested, and for this reason, the process of turning on the first display panel 410 to be tested, the second display panel 420 to be tested, the third display panel 430 and the fourth display panel 440 is as follows: the controller 110 respectively sends power control signals to the first power management module 310 and the second power management module 320 through the first a signal output end a1 and the first B signal output end a2, the first power management module 310 and the second power management module 320 respectively input power supply voltages to the first switch control circuit 210 and the second switch control circuit 220 after receiving the power control signals, the controller 110 respectively sends switch control signals to the first switch control circuit 210 and the second switch control circuit 220 through the second B signal output end B1 and the second B signal output end B2, the first switch control circuit 210 and the second switch control circuit 220 are turned on after receiving the switch control signals, the first switch control circuit 210 outputs the power supply voltages input by the first power management module 310 to the first to-be-tested display panel 410, so that the first to-be-tested display panel 410 is turned on, the second switch control circuit 220 outputs the power supply voltage input by the second power management module 320 to the second to-be-tested display panel 420, the third to-be-tested display panel 430 and the fourth to-be-tested display panel 440, and enables the second to-be-tested display panel 420, the third to-be-tested display panel 430 and the fourth to-be-tested display panel 440 to be turned on. Therefore, the controller 110 controls the first switch control circuit 210 and the second switch control circuit 220 to be turned on, so that the voltages output by the first power management module 310 and the second power management module 320 are transmitted to the display panels to be tested, and the display panels to be tested are controlled to be turned on.
In the technical scheme of this embodiment, a power supply circuit for a display panel is provided, where the circuit includes a controller, M power management modules, M switch control circuits, and a display panel to be tested, where the controller is at least provided with M first signal output ends and M second signal output ends, and M is a positive integer greater than or equal to 2; each first signal output end of the controller is electrically connected with a corresponding power management module, each second signal output end of the controller is electrically connected with a corresponding control end of a switch control circuit, each power management module is electrically connected with a corresponding voltage input end of the switch control circuit, and the voltage output end of each switch control circuit is electrically connected with the voltage input end of the display panel to be tested, wherein the switch control circuit is used for outputting the voltage input by the voltage input end from the voltage output end according to the signal of the control end.
Example two
Fig. 2 is a circuit diagram of a power supply circuit of a display panel provided in the second embodiment of the present invention, and based on the above technical solution, the embodiment of the present invention explains a control process of a switch control circuit. Each of the switch control circuits is the same, and for example, taking the first switch control circuit 210 in fig. 1 as an example, referring to fig. 2, the switch control circuit 210 includes a first MOS transistor 211, a second MOS transistor 212, the first resistor 213, the second resistor 214 and the third resistor 215, the gate of the first MOS transistor 211 is connected to the second signal output terminal of the controller 110, the first pole of the first MOS transistor 211 is grounded, the second pole of the first MOS transistor 211 is connected to the gate of the second MOS transistor 212, the first end of the first resistor 213 is connected to the gate of the first MOS transistor 211, the second end of the first resistor 213 is connected to the first pole of the first MOS transistor 211, the first pole of the second MOS transistor 212 is connected to the power management module 310, the power management module 310 is further connected to the gate of the second MOS transistor 212 through the second resistor 214, the second pole of the second MOS transistor 212 is grounded through the third resistor 215, and the second pole of the second MOS transistor 212 is further electrically connected to the voltage input terminal of the display panel 410 to be tested.
The second resistor 214 and the third resistor 215 may function as a current limiting to protect the first MOS transistor 211 and the second MOS transistor 212.
Optionally, the switch control circuit 210 further includes a fourth resistor 216, and the control terminal of the switch control circuit 210 is connected to the gate of the first MOS transistor 211 through the fourth resistor 216.
Optionally, the first MOS transistor 211 is an NPN type MOS transistor, and the second MOS transistor 212 is a PNP type MOS transistor.
Optionally, the switch control circuit further includes at least one first capacitor 217, a first end of the first capacitor 217 is connected to the voltage output terminal of the switch control circuit 210, and a second end of the first capacitor 217 is grounded.
The first capacitor 217 may be used for filtering the power signal noise.
In the technical scheme of this embodiment, the process of the controller controlling the opening of the display panel to be tested is as follows: for example, taking the controller to control the on of a switch control circuit as an example, referring to fig. 2, when the display panel 410 to be tested needs to be turned on, the controller 110 sends a power control signal to the power management module 310 through the first signal output terminal a1, the power management module 310 inputs a power supply voltage to the switch control circuit after receiving the power control signal, the controller 110 sends a switch control signal to the switch control circuit through the second signal output terminal B1, the switch control signal is transmitted to the gate of the first MOS transistor 211 through the fourth resistor 216 and the first resistor 213, so that the first MOS transistor 211 is turned on, the first MOS transistor 211 outputs a low level signal, that is, the gate of the second MOS transistor 212 is pulled down, so that the second MOS transistor 212 is turned on, after the second MOS transistor 212 is turned on, the power supply voltage input by the power management module 310 is output to the display panel 410 to be tested through the second diode of the second MOS transistor 212, the display panel 410 to be tested is controlled to be turned on. It should be noted here that the structures and functions of other switch control circuits are the same as those of the first switch control circuit 210 in this embodiment, which are not shown here, and here, the voltage output by the second MOS transistor can enable one or more display panels to be tested to be turned on simultaneously, which is only given here as an example to control the turning on of one display panel to be tested, and the specific number of the display panels to be tested is not limited here.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (5)
1. A power supply circuit for a display panel, comprising: the display device comprises a controller, M power management modules, M switch control circuits and a display panel to be tested, wherein the controller is at least provided with M first signal output ends and M second signal output ends, and M is a positive integer greater than or equal to 2; each first signal output end of the controller is electrically connected with one power supply management module correspondingly, each second signal output end of the controller is electrically connected with a control end of one switch control circuit correspondingly, each power supply management module is electrically connected with a voltage input end of one switch control circuit correspondingly, a voltage output end of each switch control circuit is electrically connected with a voltage input end of the display panel to be tested, and the switch control circuit is used for outputting voltage input by the voltage input end from the voltage output end according to signals of the control ends.
2. The power supply circuit of the display panel according to claim 1, wherein the switch control circuit comprises a first MOS transistor, a second MOS transistor, a first resistor, a second resistor, and a third resistor, the grid electrode of the first MOS tube is connected with a second signal output end of the controller, the first pole of the first MOS tube is grounded, the second pole of the first MOS tube is connected with the grid electrode of the second MOS tube, the first end of the first resistor is connected with the grid electrode of the first MOS tube, the second end of the first resistor is connected with the first pole of the first MOS tube, the first pole of the second MOS tube is connected with the power management module, the power management module is also connected with the grid electrode of the second MOS tube through the second resistor, and the second pole of the second MOS tube is grounded through the third resistor, and is also correspondingly and electrically connected with the voltage input end of the display panel to be tested.
3. The power supply circuit of the display panel according to claim 2, wherein the switch control circuit further comprises a fourth resistor, and a control terminal of the switch control circuit is connected to the gate of the first MOS transistor through the fourth resistor.
4. The power supply circuit of claim 2, wherein the first MOS transistor is an NPN MOS transistor, and the second MOS transistor is a PNP MOS transistor.
5. The power supply circuit of claim 1, wherein the switch control circuit further comprises at least one first capacitor, a first terminal of the first capacitor is connected to the voltage output terminal of the switch control circuit, and a second terminal of the first capacitor is connected to ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922218570.9U CN210575025U (en) | 2019-12-11 | 2019-12-11 | Power supply circuit of display panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922218570.9U CN210575025U (en) | 2019-12-11 | 2019-12-11 | Power supply circuit of display panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210575025U true CN210575025U (en) | 2020-05-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922218570.9U Active CN210575025U (en) | 2019-12-11 | 2019-12-11 | Power supply circuit of display panel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210575025U (en) |
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- 2019-12-11 CN CN201922218570.9U patent/CN210575025U/en active Active
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