CN210865578U - Power consumption detection circuit of display panel - Google Patents
Power consumption detection circuit of display panel Download PDFInfo
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- CN210865578U CN210865578U CN201922219161.0U CN201922219161U CN210865578U CN 210865578 U CN210865578 U CN 210865578U CN 201922219161 U CN201922219161 U CN 201922219161U CN 210865578 U CN210865578 U CN 210865578U
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Abstract
The embodiment of the utility model discloses display panel's consumption detection circuitry, this circuit includes: the device comprises a controller, at least one power module, at least one voltage and current monitoring circuit and at least one current detection resistor, wherein each current detection resistor is connected in series with a power supply circuit for connecting a display panel to be detected and the power module; the voltage and current monitoring circuits correspond to the current detection resistors one by one, a first end and a second end of each current detection resistor are respectively connected with a first signal input end and a second signal input end of the corresponding voltage and current monitoring circuit, and the first end of each current detection resistor is also connected with a third signal input end of the corresponding voltage and current monitoring circuit; the communication signal end of each voltage and current monitoring circuit is connected with the communication signal end of the controller; the voltage and current monitoring circuit is used for sampling the voltages at the two ends of the current detection resistor and the voltage output by the power supply module, calculating the current on the current detection resistor, and realizing the effect of quickly and effectively realizing the power consumption test of the display panel to be tested.
Description
Technical Field
The embodiment of the utility model provides a relate to liquid crystal display panel test technique, especially relate to a display panel's consumption detection circuitry.
Background
Before the display panel leaves a factory, related performance tests are required, for example, the power consumption of the display panel is tested to test the power consumption of the display panel in different states, so that the display panel is better monitored. Thus, it is important to realize power consumption detection for the display panel.
Generally, an inspection machine is used for lighting a display panel to be detected, the display panel is controlled to display different pictures, and then the power consumption condition of the display panel in different states is detected in a current detection mode. Although the method can realize the power consumption test of the display panel, the problems of slow response time, long time sequence and low working efficiency of the detection circuit exist.
SUMMERY OF THE UTILITY MODEL
The utility model provides a display panel's consumption detection circuitry to quick, effectual realization is to the consumption test of the display panel that awaits measuring.
The embodiment of the utility model provides a display panel's consumption detection circuitry, this circuit includes: the device comprises a controller, at least one power module, at least one voltage and current monitoring circuit and at least one current detection resistor, wherein each current detection resistor is connected in series with a power supply circuit for connecting a display panel to be detected and the power module; the voltage and current monitoring circuits correspond to the current detection resistors one by one, a first end and a second end of each current detection resistor are respectively connected with a first signal input end and a second signal input end of the corresponding voltage and current monitoring circuit, and the first end of each current detection resistor is also connected with a third signal input end of the corresponding voltage and current monitoring circuit; the communication signal end of each voltage and current monitoring circuit is connected with the communication signal end of the controller; the voltage and current monitoring circuit is used for sampling the voltages at two ends of the current detection resistor and the voltage output by the power supply module and calculating the current on the current detection resistor.
Optionally, the voltage and current monitoring circuit further includes a first resistor, a second resistor, and a first capacitor, a first end of the current detection resistor is connected to a first signal input terminal of the voltage and current monitoring circuit through the first resistor, a second end of the current detection resistor is connected to a second signal input terminal of the voltage and current monitoring circuit through the second resistor, and the first capacitor is connected in parallel between the first signal input terminal and the second signal input terminal of the voltage and current monitoring circuit.
Optionally, the resistance values of the first resistor and the second resistor are 10 ohms.
Optionally, the voltage current monitoring circuit includes an INA226 current voltage monitoring chip and its peripheral circuits.
Optionally, the voltage and current monitoring circuit further includes a power input terminal and an enable terminal, the power module includes a first voltage output terminal and a second voltage output terminal, and the first voltage output terminal of the power module is connected to the first terminal of the current detection resistor; the second voltage output end of the power supply module is connected with the power supply input end of the voltage and current monitoring circuit and used for providing power supply voltage for the voltage and current monitoring circuit; and the second voltage output end of the power supply module is connected with the enabling end of the voltage and current monitoring circuit.
Optionally, the voltage and current monitoring circuit further includes a second capacitor and a third resistor, a first end of the second capacitor is connected to the power input end of the voltage and current monitoring circuit, a second end of the second capacitor is grounded, a first end of the third resistor is connected to the enable end of the voltage and current monitoring circuit, and a second end of the third resistor is connected to the second voltage output end of the power module.
Optionally, the communication signal terminal of the voltage and current monitoring circuit is an I2C communication signal terminal.
The utility model discloses a display panel's consumption detection circuitry, this circuit includes: the device comprises a controller, at least one power module, at least one voltage and current monitoring circuit and at least one current detection resistor, wherein each current detection resistor is connected in series with a power supply circuit for connecting a display panel to be detected and the power module; the voltage and current monitoring circuits correspond to the current detection resistors one by one, a first end and a second end of each current detection resistor are respectively connected with a first signal input end and a second signal input end of the corresponding voltage and current monitoring circuit, and the first end of each current detection resistor is also connected with a third signal input end of the corresponding voltage and current monitoring circuit; the communication signal end of each voltage and current monitoring circuit is connected with the communication signal end of the controller; the voltage and current monitoring circuit is used for sampling the voltages at two ends of the current detection resistor and the voltage output by the power supply module and calculating the current on the current detection resistor. The problems of slow response time, long time sequence time and low working efficiency of a detection circuit in the prior art are solved, and the effect of quickly and effectively realizing power consumption test of the display panel to be tested is realized.
Drawings
Fig. 1 is a block diagram of a power consumption detection circuit of a display panel according to a first embodiment of the present invention;
fig. 2 is a circuit diagram of a power consumption detection 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 block diagram of a power consumption detection circuit of a display panel according to an embodiment of the present invention, referring to fig. 1, the power consumption detection circuit includes: referring to fig. 1, the power consumption detection circuit of the display panel exemplarily includes a power module 210, a current detection resistor 310 and a voltage and current detection resistor 410, and the voltage and current detection circuit and the current detection resistor 310 are connected in series to a power supply line connecting the display panel 510 to be detected and the power module 210; the voltage and current monitoring circuits 410 are in one-to-one correspondence with the current detection resistors 310, a first end a1 and a second end a2 of each current detection resistor 310 are respectively connected with a first signal input end B1 and a second signal input end B2 of the corresponding voltage and current monitoring circuit 410, and a first end a1 of each current detection resistor 310 is also connected with a third signal input end B3 of the corresponding voltage and current monitoring circuit 410; the communication signal terminal of the voltage and current monitoring circuit 410 is connected with the communication signal terminal of the controller 110; the voltage and current monitoring circuit 410 is configured to sample voltages at two ends of the current detection resistor 310 and a voltage output by the power module 210, and calculate a current on the current detection resistor 310.
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 supply module can adopt a power supply management chip.
In the technical solution of this embodiment, the implementation process of the power consumption detection circuit of the display panel is as follows: for example, referring to fig. 1, when performing a power consumption test on the display panel to be tested, the display panel to be tested is connected to the second end of the current detection resistor, and for this purpose, the process of performing the power consumption test on the display panel to be tested 510 is as follows: the controller 110 sends a power control signal to the power module 210, the power module 210 receives the power control signal and then supplies a voltage to the current detecting resistor 310, the voltage is transmitted to the display panel 510 to be tested through the current detecting resistor 310, so that the display panel 510 to be tested is turned on, and after the display panel to be tested is turned on, in order to detect the power consumption of the display panel 510 to be tested, the voltage and current monitoring circuit 410 samples the voltage flowing into the two ends of the current detection resistor 310 and the voltage output to the first end a1 of the current detection resistor 310 by the power module 210, the voltage and current monitoring circuit 410 calculates the current flowing through the current detection resistor 310 according to each sampling voltage and transmits the calculated current value and each sampling voltage to the controller 110 through the communication signal end, the controller 110 calculates the power of the current detection resistor 310 according to the received current sent by the voltage and current monitoring circuit 410 and each sampling voltage, and accordingly, the power consumption performance of the display panel 510 to be tested is judged.
The technical solution of this embodiment is to provide a power consumption detection circuit of a display panel, where the circuit includes: the device comprises a controller, at least one power module, at least one voltage and current monitoring circuit and at least one current detection resistor, wherein each current detection resistor is connected in series with a power supply circuit for connecting a display panel to be detected and the power module; the voltage and current monitoring circuits correspond to the current detection resistors one by one, a first end and a second end of each current detection resistor are respectively connected with a first signal input end and a second signal input end of the corresponding voltage and current monitoring circuit, and the first end of each current detection resistor is also connected with a third signal input end of the corresponding voltage and current monitoring circuit; the communication signal end of each voltage and current monitoring circuit is connected with the communication signal end of the controller; the voltage and current monitoring circuit is used for sampling the voltages at two ends of the current detection resistor and the voltage output by the power supply module and calculating the current on the current detection resistor. The problems of slow response time, long time sequence time and low working efficiency of a detection circuit in the prior art are solved, and the effect of quickly and effectively realizing power consumption test of the display panel to be tested is achieved.
Example two
Fig. 2 is a circuit diagram of a power consumption detection circuit of a display panel according to a second embodiment of the present invention, and on the basis of the above technical solution, the embodiment of the present invention explains a control process of a voltage and current monitoring circuit. Referring to fig. 2, an exemplary power consumption detection circuit of a display panel is shown in the form of 2 power supply modules, 2 current detection resistors, and 2 voltage-current monitoring circuits including an INA226 current-voltage monitoring chip and its peripheral circuits. The INA226 current and voltage monitoring chip has high precision which can reach 0.02%, and the voltage input range is 0-36V. Specifically, the power consumption detection circuit of the display panel includes a first power module 210, a second power module 220, a first current detection resistor 310, a second current detection resistor 320, a first INA226 current-voltage monitoring chip 420, and a second INA226 current-voltage monitoring chip 430, where the first current detection resistor 310 is connected in series to a power supply line connecting the first display panel to be detected 510 and the first power module 210; the first INA226 current-voltage monitoring chips 420 correspond to the first current-detecting resistors 310 one by one, a first end a1 and a second end a2 of each first current-detecting resistor 310 are respectively connected with a first signal input end B1 and a second signal input end B2 of the corresponding first INA226 current-voltage monitoring chip 420, and a first end a1 of each first current-detecting resistor 310 is further connected with a third signal input end B3 of the corresponding first INA226 current-voltage monitoring chip 420; the communication signal terminal of the first INA226 current-voltage monitoring chip 420 is connected with the communication signal terminal of the controller 110; the first INA226 current-voltage monitoring chip 420 is configured to sample voltages at two ends of the first current detection resistor 310 and a voltage output by the first power module 210, and calculate a current on the first current detection resistor 310; similarly, the second current detecting resistor 320 is connected in series to the power supply line connecting the second display panel to be tested 520 and the second power module 220; the second INA226 current-voltage monitoring chips 430 correspond to the second current-detecting resistors 320 one by one, a first end a1 and a second end a2 of the second current-detecting resistor 320 are respectively connected with a first signal input end B1 and a second signal input end B2 of the corresponding second INA226 current-voltage monitoring chip 430, and a first end a1 of the second current-detecting resistor 320 is further connected with a third signal input end B3 of the corresponding second INA226 current-voltage monitoring chip 430; the communication signal terminal of the second INA226 current-voltage monitoring chip 430 is connected with the communication signal terminal of the controller 110; the second INA226 current-voltage monitoring chip 430 is configured to sample voltages at two ends of the second current detection resistor 320 and a voltage output by the second power module 220, and calculate a current on the second current detection resistor 320. With continued reference to fig. 2, the first voltage-current monitoring circuit further includes a first a resistor 411, a second a resistor 412 and a first a capacitor 413, the first terminal a1 of the first current-detecting resistor 310 is connected to the first signal input terminal B1 of the first INA226 current-voltage monitoring chip 420 through the first a resistor 411, the second terminal a2 of the first current-detecting resistor 310 is connected to the second signal input terminal B2 of the first INA226 current-voltage monitoring chip 420 through the second a resistor 412, and the first a capacitor 413 is connected in parallel between the first signal input terminal B1 and the second signal input terminal B2 of the first INA226 current-voltage monitoring chip 420. The second voltage and current monitoring circuit further includes a first second resistor 421, a second resistor 422 and a first second capacitor 423, a first end a1 of the second current detecting resistor 320 is connected to a first signal input end B1 of the second INA226 current and voltage monitoring chip 430 through the first second resistor 421, a second end a2 of the second current detecting resistor 320 is connected to a second signal input end B2 of the second INA226 current and voltage monitoring chip 430 through the second resistor 422, and the first second capacitor 423 is connected in parallel between the first signal input end B1 and the second signal input end B2 of the second INA226 current and voltage monitoring chip 430.
In other embodiments of the present invention, there may be three or more power modules, current detection resistors, and voltage and current monitoring circuits, which are not listed here. The first resistor 411, the second resistor 412 and the first capacitor 413 form a low-pass filter circuit to improve the detection accuracy of the voltage-current monitoring circuit.
Optionally, the resistance of the first resistor 411 and the second resistor 412 is 10 ohms.
The resistance values of the first resistor 411 and the second resistor 412 may be other resistance values according to actual needs, such as 20 ohms, 50 ohms, and the like.
Optionally, the voltage and current monitoring circuit further includes a power input terminal and an enable terminal, the power module includes a first voltage output terminal and a second voltage output terminal, and the first voltage output terminal of the power module is connected to the first terminal of the current detection resistor; the second voltage output end of the power supply module is connected with the power supply input end of the voltage and current monitoring circuit and used for providing power supply voltage for the voltage and current monitoring circuit; and the second voltage output end of the power supply module is connected with the enabling end of the voltage and current monitoring circuit.
The second voltage output end of the power supply module can input 3.3V of power supply voltage to the enable end B5 of the voltage and current monitoring circuit, so that the enable end of the current monitoring circuit is enabled. Exemplarily, referring to fig. 2, the first INA226 voltage current monitoring chip 420 includes a power input terminal B4 and an enable terminal B5 as a power input terminal and an enable terminal of the first voltage current monitoring circuit, respectively, the first power module 210 includes a first voltage output terminal C1 and a second voltage output terminal C2, the first voltage output terminal C1 of the first power module 210 is connected to the first terminal a1 of the first current detection resistor 310, the second voltage output terminal C2 of the first power module 210 is connected to the power input terminal B4 of the first INA226 voltage current monitoring chip 420, and the second voltage output terminal C2 of the first power module 210 is connected to the enable terminal B5 of the first INA226 voltage current monitoring chip 420.
Optionally, the voltage and current monitoring circuit further includes a second capacitor and a third resistor, a first end of the second capacitor is connected to the power input end of the voltage and current monitoring circuit, a second end of the second capacitor is grounded, a first end of the third resistor is connected to the enable end of the voltage and current monitoring circuit, and a second end of the third resistor is connected to the second voltage output end of the power module. Illustratively, referring to fig. 2, the first voltage-current monitoring circuit further includes a second capacitor 414 and a third resistor 415, a first terminal of the second capacitor 414 is connected to the power input terminal B4 of the first INA226 voltage-current monitoring chip 420, a second terminal of the second capacitor 414 is connected to ground, a first terminal of the third resistor 415 is connected to the enable terminal B5 of the first INA226 voltage-current monitoring chip 420, and a second terminal of the third resistor 415 is connected to the second voltage output terminal C2 of the first power module 210. Referring to fig. 2, the second vcd monitoring circuit further includes a second capacitor 424 and a third resistor 425, a first terminal of the second capacitor 424 is connected to the power input terminal B4 of the second INA226 vcd chip 430, a second terminal of the second capacitor 424 is connected to ground, a first terminal of the third resistor 425 is connected to the enable terminal B5 of the second INA226 vcd chip 430, and a second terminal of the third resistor 425 is connected to the second voltage output terminal C2 of the second power module 220.
The second capacitor plays a role in filtering and can filter noise at the power input end.
Optionally, the communication signal terminal of the voltage and current monitoring circuit is an I2C communication signal terminal.
In the technical solution of this embodiment, the control process of the voltage and current monitoring circuit is as follows: for example, referring to fig. 2, the controller 110 sends power control signals to the first power module 210 and the second power module 220, respectively, the first power module 210 and the second power module 220 receive the power control signals and then respectively send 12V voltages to the first current detection resistor 310 and the second current detection resistor 320, the voltage is transmitted to the first display panel to be tested 510 through the first current detecting resistor 310, so that the first display panel to be tested 510 is turned on, and is transmitted to the second display panel to be tested 520 through the second current detecting resistor 320, so that the second display panel to be tested 520 is turned on, meanwhile, after receiving the power control signal sent by the controller 110, the first power module 210 and the second power module 220 also provide a supply voltage and an enable voltage to the first INA226 current-voltage monitoring chip 420 and the second INA226 current-voltage monitoring chip 430, respectively, where the supply voltage and the enable voltage may be 3.3V. The first INA226 current and voltage monitoring chip starts to operate after being enabled, the first INA226 current and voltage monitoring chip samples the voltage flowing into two ends of the first current detection resistor 310 and the voltage output to the first end a1 of the first current detection resistor 310 by the first power module 210, the first INA226 current and voltage monitoring chip 420 calculates the current on the first current detection resistor 310 according to each sampled voltage and transmits the calculated current value and each sampled voltage to the controller 110 through the communication signal end, the controller 110 calculates the power of the first current detection resistor 310 according to the received current and each sampled voltage sent by the first INA226 current and voltage monitoring chip 420, and accordingly, the power consumption performance of the first display panel to be detected 510 is judged. Similarly, the second INA226 current-voltage monitoring chip 430 starts to operate after being enabled, the second INA226 current-voltage monitoring chip 430 samples the voltage flowing into the two ends of the second current detection resistor 320 and the voltage output to the first end a1 of the second current detection resistor 320 by the second power module 220, the second INA226 current-voltage monitoring chip 430 calculates the current on the second current detection resistor 320 according to each sampled voltage and transmits the calculated current value and each sampled voltage to the controller 110 through the communication signal terminal, the controller 110 calculates the power of the second current detection resistor 320 according to the received current and each sampled voltage sent by the second INA226 current-voltage monitoring chip 430, and accordingly, determines the power consumption performance of the second display panel 520 to be tested.
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 (7)
1. A power consumption detection circuit of a display panel, comprising: the device comprises a controller, at least one power module, at least one voltage and current monitoring circuit and at least one current detection resistor, wherein each current detection resistor is connected in series with a power supply circuit which is connected with a display panel to be detected and the power module; the voltage and current monitoring circuits correspond to the current detection resistors one to one, a first end and a second end of each current detection resistor are respectively connected with a first signal input end and a second signal input end of the corresponding voltage and current monitoring circuit, and the first end of each current detection resistor is also connected with a third signal input end of the corresponding voltage and current monitoring circuit; the communication signal end of each voltage and current monitoring circuit is connected with the communication signal end of the controller; the voltage and current monitoring circuit is used for sampling voltages at two ends of the current detection resistor and the voltage output by the power module and calculating the current on the current detection resistor.
2. The power consumption detection circuit of a display panel according to claim 1, wherein the voltage and current monitoring circuit further comprises a first resistor, a second resistor, and a first capacitor, a first end of the current detection resistor is connected to the first signal input terminal of the voltage and current monitoring circuit through the first resistor, a second end of the current detection resistor is connected to the second signal input terminal of the voltage and current monitoring circuit through the second resistor, and the first capacitor is connected in parallel between the first signal input terminal and the second signal input terminal of the voltage and current monitoring circuit.
3. The power consumption detection circuit of the display panel according to claim 2, wherein the first resistor and the second resistor have a resistance of 10 ohms.
4. The power consumption detection circuit of the display panel according to claim 2, wherein the voltage current monitoring circuit comprises an INA226 current voltage monitoring chip and its peripheral circuits.
5. The power consumption detection circuit of a display panel according to claim 1, wherein the voltage-current monitoring circuit further comprises a power input terminal and an enable terminal, the power module comprises a first voltage output terminal and a second voltage output terminal, and the first voltage output terminal of the power module is connected to the first terminal of the current detection resistor; a second voltage output end of the power supply module is connected with a power supply input end of the voltage and current monitoring circuit and used for providing power supply voltage for the voltage and current monitoring circuit; and the second voltage output end of the power supply module is connected with the enabling end of the voltage and current monitoring circuit.
6. The power consumption detection circuit of the display panel according to claim 5, wherein the voltage and current monitoring circuit further comprises a second capacitor and a third resistor, a first end of the second capacitor is connected to the power input terminal of the voltage and current monitoring circuit, a second end of the second capacitor is connected to ground, a first end of the third resistor is connected to the enable terminal of the voltage and current monitoring circuit, and a second end of the third resistor is connected to the second voltage output terminal of the power module.
7. The power consumption detection circuit of a display panel according to claim 1, wherein the communication signal terminal of the voltage current monitoring circuit is an I2C communication signal terminal.
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| CN201922219161.0U CN210865578U (en) | 2019-12-11 | 2019-12-11 | Power consumption detection circuit of display panel |
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| CN201922219161.0U CN210865578U (en) | 2019-12-11 | 2019-12-11 | Power consumption detection circuit of display panel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11812548B2 (en) | 2021-03-23 | 2023-11-07 | Xiamen Tianma Micro-Electronics Co., Ltd. | Display module and method for forming same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11812548B2 (en) | 2021-03-23 | 2023-11-07 | Xiamen Tianma Micro-Electronics Co., Ltd. | Display module and method for forming same |
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