CN214959484U - Display panel starting circuit and ultrasonic equipment - Google Patents
Display panel starting circuit and ultrasonic equipment Download PDFInfo
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- CN214959484U CN214959484U CN202120276271.5U CN202120276271U CN214959484U CN 214959484 U CN214959484 U CN 214959484U CN 202120276271 U CN202120276271 U CN 202120276271U CN 214959484 U CN214959484 U CN 214959484U
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Abstract
The application provides a display panel start-up circuit and ultrasonic equipment. The display panel starting circuit comprises a rectifying circuit and an amplifying circuit; the rectifying circuit comprises a Schmitt trigger, an optical coupler and a first resistor, wherein the output end of the Schmitt trigger is connected with the first end of the first resistor, and the second end of the first resistor is connected with the second input end of the optical coupler. After the startup input signal passes through the Schmidt trigger, the electric signal received by the input end of the optical coupler is a steep square wave signal, so that the signal at the input end of the optical coupler is a stable signal, the light emitted by the light emitting side of the optical coupler is stable, the output signal of the output end of the optical coupler is more stable, and the stability of the final output signal of the display panel startup circuit is improved.
Description
Technical Field
The utility model relates to an ultrasonic equipment technical field especially relates to a display panel start circuit and ultrasonic equipment.
Background
With the development of electronic power technology, a starting signal in a starting circuit of ultrasonic equipment is adjusted and controlled, and a circuit board of the traditional electronic equipment adopts an optical coupler to perform circuit switching control, so that a finally output signal is adjusted according to an input starting signal, automatic adjustment is realized, and the output signal of the starting equipment is accurately controlled.
However, when the input signal of the switch is controlled by the conventional optical coupler, and the voltage at the input end of the optical coupler changes, the voltage at the light emitting side of the optical coupler is easily unstable, so that the voltage at the output end of the optical coupler is severely floated, and further, the display interface of the ultrasonic device flickers, so that the display stability of the operation display interface of the ultrasonic device is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the weak point among the prior art, provide a display panel start circuit and ultrasonic equipment of the stability of the input signal who improves optical coupler.
The purpose of the utility model is realized through the following technical scheme:
a display panel power-on circuit comprises: a rectifier circuit and an amplifier circuit; the rectifying circuit comprises a Schmitt trigger, an optical coupler and a first resistor, wherein the input end of the Schmitt trigger is used for receiving a starting-up input signal, the output end of the Schmitt trigger is connected with the first end of the first resistor, the second end of the first resistor is connected with the second input end of the optical coupler, and the first input end of the optical coupler is used for being connected with a reference power supply; the amplifying circuit comprises an operational amplifier, a second resistor and a third resistor, wherein the output end of the Schmitt trigger is connected with the non-inverting input end of the operational amplifier, the output end of the Schmitt trigger is further connected with the first end of the second resistor, the first end of the second resistor is grounded, the second end of the second resistor is connected with the inverting input end of the operational amplifier, the second end of the second resistor is further connected with the first end of the third resistor, the second end of the third resistor is connected with the output end of the operational amplifier, and the output end of the operational amplifier is used for outputting a starting-up signal.
In one embodiment, the rectifier circuit further comprises a fourth resistor, and the input terminal of the schmitt trigger is grounded through the fourth resistor.
In one embodiment, the amplifying circuit further includes a power-on electronic switching tube, an output end of the optical coupler is connected to a first end of the power-on electronic switching tube, a second end of the power-on electronic switching tube is connected to a non-inverting input end of the operational amplifier, and a control end of the power-on electronic switching tube is configured to receive a display control signal.
In one embodiment, the amplifying circuit further includes a sixth resistor, a seventh resistor, and a first capacitor, the output terminal of the optical coupler is connected to the first end of the power-on electronic switching tube through the sixth resistor, the output terminal of the optical coupler is further connected to the first end of the power-on electronic switching tube through the first capacitor, and the output terminal of the optical coupler is further connected to the control terminal of the power-on electronic switching tube through the seventh resistor.
In one embodiment, the amplifying circuit further includes an eighth resistor, and the second end of the on-state electronic switching tube is connected to the first end of the second resistor through the eighth resistor.
In one embodiment, the amplifying circuit further includes a ninth resistor, the second end of the on-state electronic switch tube is connected to the first end of the ninth resistor, and the second end of the ninth resistor is connected to the non-inverting input terminal of the operational amplifier.
In one embodiment, the amplifying circuit further includes a second capacitor, and the second terminal of the ninth resistor is grounded through the second capacitor.
In one embodiment, the amplifying circuit further includes a tenth resistor, an output terminal of the operational amplifier is connected to a first terminal of the tenth resistor, and a second terminal of the tenth resistor is configured to output a power-on signal.
In one embodiment, the amplifying circuit further includes a third capacitor, and the output terminal of the operational amplifier is grounded through the third capacitor.
An ultrasonic device comprises the display panel power-on circuit of any one of the embodiments.
Compared with the prior art, the utility model discloses at least, following advantage has:
after the startup input signal passes through the Schmidt trigger, the electric signal received by the input end of the optical coupler is a steep square wave signal, so that the signal at the input end of the optical coupler is a stable signal, the light emitted by the light emitting side of the optical coupler is stable, the output signal of the output end of the optical coupler is more stable, and the stability of the final output signal of the display panel startup circuit is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a circuit diagram of a display panel power-on circuit in an embodiment.
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 many 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.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
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. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The utility model relates to a display panel start circuit. In one embodiment, the display panel power-on circuit includes a rectifying circuit and an amplifying circuit. The rectifying circuit comprises a Schmitt trigger, an optical coupler and a first resistor. The input end of the Schmitt trigger is used for receiving a starting-up input signal. And the output end of the Schmitt trigger is connected with the first end of the first resistor. And the second end of the first resistor is connected with the second input end of the optical coupler. The first input end of the optical coupler is used for being connected with a reference power supply. The amplifying circuit comprises an operational amplifier, a second resistor and a third resistor. The output end of the Schmitt trigger is connected with the non-inverting input end of the operational amplifier, and the output end of the Schmitt trigger is also connected with the first end of the second resistor. The first end of the second resistor is grounded. The second end of the second resistor is connected with the inverting input end of the operational amplifier, and the second end of the second resistor is also connected with the first end of the third resistor. And the second end of the third resistor is connected with the output end of the operational amplifier. And the output end of the operational amplifier is used for outputting a starting-up signal. After the startup input signal passes through the Schmidt trigger, the electric signal received by the input end of the optical coupler is a steep square wave signal, so that the signal at the input end of the optical coupler is a stable signal, the light emitted by the light emitting side of the optical coupler is stable, the output signal of the output end of the optical coupler is more stable, and the stability of the final output signal of the display panel startup circuit is improved.
Please refer to fig. 1, which is a circuit diagram of a display panel power-on circuit according to an embodiment of the present invention.
The display panel power-on circuit 10 of an embodiment includes a rectifying circuit 100 and an amplifying circuit 200. The rectifier circuit 100 includes a schmitt trigger SM1, an optocoupler U1, and a first resistor R1. The input of the schmitt trigger SM1 is used for receiving a power-on input signal. The output end of the Schmitt trigger SM1 is connected with the first end of the first resistor R1. The second end of the first resistor R1 is connected with the second input end of the optocoupler U1. A first input of the optocoupler U1 is for connection to a reference power supply. The amplifying circuit 200 includes an operational amplifier U2, a second resistor R2, and a third resistor R3. The output end of the schmitt trigger SM1 is connected with the non-inverting input end of the operational amplifier U2, and the output end of the schmitt trigger SM1 is further connected with the first end of the second resistor R2. A first end of the second resistor R2 is connected to ground. The second end of the second resistor R2 is connected to the inverting input terminal of the operational amplifier U2, and the second end of the second resistor R2 is also connected to the first end of the third resistor R3. The second end of the third resistor R3 is connected to the output terminal of the operational amplifier U2. The output end of the operational amplifier U2 is used for outputting a starting-up signal.
In this embodiment, after the power-on input signal passes through the schmitt trigger SM1, the electrical signal received by the input terminal of the optical coupler U1 is a steep square wave signal, so that the signal at the input terminal of the optical coupler U1 is a stable signal, and thus the light emitted by the light emitting side of the optical coupler U1 is stable, the output signal at the output terminal of the optical coupler U1 is more stable, and the stability of the final output signal of the power-on circuit of the display panel is improved.
In one embodiment, referring to fig. 1, the rectifier circuit 100 further includes a fourth resistor R4, and the input terminal of the schmitt trigger SM1 is grounded through the fourth resistor R4. In this embodiment, the fourth resistor R4 is connected to an input terminal of the schmitt trigger SM1, the input terminal of the schmitt trigger SM1 is configured to receive a power-on input signal, when a current of the power-on input signal is too large, a part of the current is directed to a common ground terminal through the fourth resistor R4, and the fourth resistor R4 implements current shunting of the power-on input signal, thereby reducing a situation that a large current flows into the schmitt trigger SM1, so as to reduce a probability that the schmitt trigger SM1 is burned out due to an excessively large input circuit, improve an operation stability of the schmitt trigger SM1, and further improve a service life of the schmitt trigger SM 1.
In one embodiment, referring to fig. 1, the amplifying circuit 200 further includes a power-on electronic switch Q1, the output terminal of the optical coupler U1 is connected to the first terminal of the power-on electronic switch Q1, the second terminal of the power-on electronic switch Q1 is connected to the non-inverting input terminal of the operational amplifier U2, and the control terminal of the power-on electronic switch Q1 is configured to receive a display control signal. In this embodiment, the control end of the electronic switch Q1 is connected to a control chip, and the control chip adjusts the voltage of the control end of the electronic switch Q1, so as to turn on or off the electronic switch Q1. When the on-state electronic switch Q1 is in an amplifying state, the current at the output terminal of the optocoupler U1 is amplified, so as to increase the voltage at the non-inverting input terminal of the operational amplifier U2. In this embodiment, the electronic turn-on switch Q1 is an NPN type triode, the electronic turn-on switch Q1 is KTN2907AS, the first end of the electronic turn-on switch Q1 is an emitter of the triode, the second end of the electronic turn-on switch Q1 is a collector of the triode, and the control end of the electronic turn-on switch Q1 is a base of the triode.
Further, the amplifying circuit 200 further includes a sixth resistor R6, a seventh resistor R7, and a first capacitor C1, the output end of the optical coupler U1 is connected to the first end of the on-state electronic switch Q1 through the sixth resistor R6, the output end of the optical coupler U1 is connected to the first end of the on-state electronic switch Q1 through the first capacitor C1, and the output end of the optical coupler U1 is connected to the control end of the on-state electronic switch Q1 through the seventh resistor R7. In this embodiment, the sixth resistor R6, the seventh resistor R7, and the first capacitor C1 form a bootstrap circuit, and the sixth resistor R6 and the seventh resistor R7 connect the first end and the control end of the electronic on-off switch Q1, that is, the sixth resistor R6 and the seventh resistor R7 are connected in series between the first end and the control end of the electronic on-off switch Q1, that is, the sixth resistor R6 and the seventh resistor R7 form a bootstrap resistor, so that the conduction characteristic of the first end of the electronic on-off switch Q1 is improved, and thus the voltage drop between the control end and the first end of the electronic on-off switch Q1 is more stable, and the operation stability of the electronic on-off switch Q1 in the amplification state is facilitated. Moreover, by connecting the first capacitor C1 in parallel to the sixth resistor R6, when different equivalent bootstrap resistors are used for signals with different frequencies, for example, when the frequency of the output terminal of the optocoupler U1 is smaller than the first turning frequency, the first capacitor C1 is open, and the resistance value of the equivalent bootstrap resistor between the first terminal and the control terminal of the turn-on electronic switch Q1 is the total resistance value of the sixth resistor R6 and the seventh resistor R7; for another example, when the frequency of the output end of the optical coupler U1 is greater than the second transition frequency, the first capacitor C1 is short-circuited, and the resistance value of the equivalent bootstrap resistor between the first end and the control end of the power-on electronic switch Q1 is the resistance value of the seventh resistor R7. Therefore, under the input signals with different frequencies, the conduction characteristic of the first end of the starting electronic switching tube Q1 is correspondingly adjusted, and the adaptability to different input frequencies is improved.
Still further, the amplifying circuit 200 further includes an eighth resistor R8, and the second terminal of the on-state electronic switch Q1 is connected to the first terminal of the second resistor R2 through the eighth resistor R8. In this embodiment, the eighth resistor R8 connects the second terminal of the on-state electronic switch Q1 to the inverting input terminal of the operational amplifier U2, the eighth resistor R8 limits the current of the second terminal of the on-state electronic switch Q1, and since the current of the second terminal of the on-state electronic switch Q1 is an amplification of the output current of the optocoupler U1, the current is limited by the eighth resistor R8 in order to avoid an excessive current input into the operational amplifier U2.
Still further, the amplifying circuit 200 further includes a ninth resistor R9, the second terminal of the on-electronic switch Q1 is connected to the first terminal of the ninth resistor R9, and the second terminal of the ninth resistor R9 is connected to the non-inverting input terminal of the operational amplifier U2. In this embodiment, the ninth resistor R9 drops the voltage at the second terminal of the on-electronic switch Q1, so as to prevent the voltage at the second terminal of the on-electronic switch Q1 from being directly applied to the non-inverting input terminal of the operational amplifier U2, and thus prevent the non-inverting input terminal of the operational amplifier U2 from being damaged due to an excessive applied voltage.
Furthermore, the amplifying circuit 200 further includes a second capacitor C2, and the second terminal of the ninth resistor R9 is grounded through the second capacitor C2. In this embodiment, the second capacitor C2 filters the voltage signal applied to the non-inverting input terminal of the operational amplifier U2, so that the high frequency voltage signal is filtered out, and the signal at the input terminal of the operational amplifier U2 is ensured to be a dc signal.
In one embodiment, referring to fig. 1, the amplifying circuit 200 further includes a tenth resistor R10, the output terminal of the operational amplifier U2 is connected to the first terminal of the tenth resistor R10, and the second terminal of the tenth resistor R10 is used for outputting a power-on signal. The tenth resistor R10 limits the current output from the output terminal of the operational amplifier U2, so as to reduce the situation that the current of the power-on signal output from the output terminal of the power-on circuit of the display panel is too large.
In one embodiment, referring to fig. 1, the amplifying circuit 200 further includes a third capacitor C3, and the output terminal of the operational amplifier U2 is grounded through the third capacitor C3. In this embodiment, the third capacitor C3 filters the voltage signal at the output terminal of the operational amplifier U2, so that the high-frequency voltage signal in the output signal is filtered out, and it is ensured that the signal at the output terminal of the operational amplifier U2 is a direct current signal, which is convenient for collecting the power-on signal of the display panel power-on circuit.
In the above embodiments, the schmitt trigger SM1 uses one trigger unit of a six-schmitt trigger SM1 with a model of MM74HC14M, the optocoupler U1 is with a model of PC410L, and the operational amplifier U2 is with a model of LM 324A.
The application also provides ultrasonic equipment comprising the display panel starting circuit in any embodiment. In this embodiment, the display panel power-on circuit includes a rectifying circuit and an amplifying circuit. The rectifying circuit comprises a Schmitt trigger, an optical coupler and a first resistor. The input end of the Schmitt trigger is used for receiving a starting-up input signal. And the output end of the Schmitt trigger is connected with the first end of the first resistor. And the second end of the first resistor is connected with the second input end of the optical coupler. The first input end of the optical coupler is used for being connected with a reference power supply. The amplifying circuit comprises an operational amplifier, a second resistor and a third resistor. The output end of the Schmitt trigger is connected with the non-inverting input end of the operational amplifier, and the output end of the Schmitt trigger is also connected with the first end of the second resistor. The first end of the second resistor is grounded. The second end of the second resistor is connected with the inverting input end of the operational amplifier, and the second end of the second resistor is also connected with the first end of the third resistor. And the second end of the third resistor is connected with the output end of the operational amplifier. And the output end of the operational amplifier is used for outputting a starting-up signal. After the startup input signal passes through the Schmidt trigger, the electric signal received by the input end of the optical coupler is a steep square wave signal, so that the signal at the input end of the optical coupler is a stable signal, the light emitted by the light emitting side of the optical coupler is stable, the output signal of the output end of the optical coupler is more stable, and the stability of the final output signal of the display panel startup circuit is improved.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A display panel power-on circuit, comprising: a rectifier circuit and an amplifier circuit;
the rectifying circuit comprises a Schmitt trigger, an optical coupler and a first resistor, wherein the input end of the Schmitt trigger is used for receiving a starting-up input signal, the output end of the Schmitt trigger is connected with the first end of the first resistor, the second end of the first resistor is connected with the second input end of the optical coupler, and the first input end of the optical coupler is used for being connected with a reference power supply;
the amplifying circuit comprises an operational amplifier, a second resistor and a third resistor, wherein the output end of the Schmitt trigger is connected with the non-inverting input end of the operational amplifier, the output end of the Schmitt trigger is further connected with the first end of the second resistor, the first end of the second resistor is grounded, the second end of the second resistor is connected with the inverting input end of the operational amplifier, the second end of the second resistor is further connected with the first end of the third resistor, the second end of the third resistor is connected with the output end of the operational amplifier, and the output end of the operational amplifier is used for outputting a starting-up signal.
2. The display panel power-on circuit of claim 1, wherein the rectifying circuit further comprises a fourth resistor, and wherein the input terminal of the schmitt trigger is grounded through the fourth resistor.
3. The display panel power-on circuit of claim 1, wherein the amplifying circuit further comprises a power-on electronic switching tube, an output terminal of the optical coupler is connected to a first terminal of the power-on electronic switching tube, a second terminal of the power-on electronic switching tube is connected to a non-inverting input terminal of the operational amplifier, and a control terminal of the power-on electronic switching tube is configured to receive a display control signal.
4. The display panel power-on circuit according to claim 3, wherein the amplifying circuit further includes a sixth resistor, a seventh resistor, and a first capacitor, the output terminal of the optical coupler is connected to the first end of the power-on electronic switching tube through the sixth resistor, the output terminal of the optical coupler is further connected to the first end of the power-on electronic switching tube through the first capacitor, and the output terminal of the optical coupler is further connected to the control terminal of the power-on electronic switching tube through the seventh resistor.
5. The display panel power-on circuit of claim 3, wherein the amplifying circuit further comprises an eighth resistor, and the second end of the power-on electronic switch tube is connected to the first end of the second resistor through the eighth resistor.
6. The display panel power-on circuit of claim 3, wherein the amplifying circuit further comprises a ninth resistor, a second terminal of the power-on electronic switch tube is connected to a first terminal of the ninth resistor, and a second terminal of the ninth resistor is connected to a non-inverting input terminal of the operational amplifier.
7. The display panel power-on circuit of claim 6, wherein the amplifying circuit further comprises a second capacitor, and a second terminal of the ninth resistor is grounded through the second capacitor.
8. The display panel power-on circuit of claim 1, wherein the amplifying circuit further comprises a tenth resistor, an output terminal of the operational amplifier is connected to a first terminal of the tenth resistor, and a second terminal of the tenth resistor is configured to output a power-on signal.
9. The display panel power-on circuit according to any one of claims 1 to 8, wherein the amplifying circuit further comprises a third capacitor, and an output terminal of the operational amplifier is grounded through the third capacitor.
10. An ultrasonic apparatus comprising the display panel turn-on circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120276271.5U CN214959484U (en) | 2021-01-30 | 2021-01-30 | Display panel starting circuit and ultrasonic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120276271.5U CN214959484U (en) | 2021-01-30 | 2021-01-30 | Display panel starting circuit and ultrasonic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214959484U true CN214959484U (en) | 2021-11-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120276271.5U Active CN214959484U (en) | 2021-01-30 | 2021-01-30 | Display panel starting circuit and ultrasonic equipment |
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| Country | Link |
|---|---|
| CN (1) | CN214959484U (en) |
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2021
- 2021-01-30 CN CN202120276271.5U patent/CN214959484U/en active Active
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Effective date of registration: 20230118 Address after: 516000 Floor 2, west of waterlogging drainage station along Guangshan Highway, Dahu River, Shuikou Town, Huicheng District, Huizhou City, Guangdong Province Patentee after: Huizhou Quancheng ultrasonic automation equipment Co.,Ltd. Address before: 516000 west of drainage station along Guangshan highway, Dahu River, Shuikou Town, Huicheng District, Huizhou City, Guangdong Province Patentee before: Huizhou yuanyitai Technology Co.,Ltd. |
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