CN111487457A - Intelligent display tool based on sensing technology - Google Patents
Intelligent display tool based on sensing technology Download PDFInfo
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- CN111487457A CN111487457A CN202010465599.1A CN202010465599A CN111487457A CN 111487457 A CN111487457 A CN 111487457A CN 202010465599 A CN202010465599 A CN 202010465599A CN 111487457 A CN111487457 A CN 111487457A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16571—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16576—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing DC or AC voltage with one threshold
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Abstract
The invention provides an intelligent display tool based on a sensing technology, which utilizes an outer frame, a display placing area, a display and an intelligent display tool control system, wherein the center part of the outer frame is provided with the display placing device, the display is arranged in the display placing device, the intelligent display tool control system is arranged on the outer frame, a current sensor is used for monitoring a current signal of a power supply circuit of the display, a voltage sensor is used for monitoring a voltage signal of the power supply circuit of the display, a vibration sensor is used for monitoring a vibration signal of the outer frame, and an input signal conditioner is used for carrying out undistorted conditioning on a signal input into the display.
Description
Technical Field
The invention relates to the field of intelligent display, in particular to an intelligent display tool based on a sensing technology.
Background
Among the prior art, the show instrument generally is show board or show screen etc. and the show board does not have the reuse nature, consequently, along with the development of science and technology and the reduction of the cost of display, more and more show instruments select for use the display as the show instrument, and the display can receive video/picture signal, more can adjust the show content in a flexible way, consequently, comparatively commonly used in exhibition hall etc..
However, since the display tool needs to be moved frequently, the display is vibrated during the movement of the display tool, and if the vibration is too large, the display screen is distorted, and similarly, if the current or voltage of the power supply does not meet the standard, the display effect is greatly affected.
Disclosure of Invention
Therefore, in order to overcome the above problems, the present invention provides an intelligent display tool based on a sensing technology, which utilizes an outer frame, a display placing area, a display, and an intelligent display tool control system, wherein the display placing area is arranged at the center part of the outer frame, the display is arranged in the display placing area, the intelligent display tool control system is arranged on the outer frame, a current sensor is used for monitoring a current signal of a power supply line of the display, a voltage sensor is used for monitoring a voltage signal of the power supply line of the display, a vibration sensor is used for monitoring a vibration signal of the outer frame, and an input signal conditioner is used for performing undistorted conditioning on a signal input to the display.
The invention provides an intelligent display tool based on a sensing technology, which comprises an outer frame, a display placing area, a display and an intelligent display tool control system, wherein the display placing area is arranged at the center part of the outer frame, the display is arranged in the display placing area, and the intelligent display tool control system is arranged on the outer frame.
The intelligent display tool based on the sensing technology comprises a current sensor, a voltage sensor, a vibration sensor, a data acquisition card, a current regulator, a central processing unit, a voltage regulator, an alarm, an input signal conditioner and a wireless transmitter; the current sensor is used for monitoring a current signal of a power supply line of the display, the voltage sensor is used for monitoring a voltage signal of the power supply line of the display, the vibration sensor is used for monitoring a vibration signal of the outer frame, the output end of the current sensor, the output end of the voltage sensor and the output end of the vibration sensor are connected with the input end of the data acquisition card, the output end of the data acquisition card is connected with the input end of the central processing unit, the current sensor transmits a collected current value to the central processing unit through the data acquisition card, the voltage sensor transmits a collected voltage value to the central processing unit through the data acquisition card, the vibration sensor transmits a collected vibration value to the central processing unit through the data acquisition card, the central processing unit stores a reference current value range, a reference voltage value range and a reference vibration value, and if the current value received, If the voltage value is within the reference voltage value range and the vibration value is smaller than the reference vibration value, the central processing unit controls the input signal conditioner to perform undistorted conditioning on a signal input to the display, if the current value received by the central processing unit is not within the reference current value range, the central processing unit controls the current regulator to regulate the current value to be within the reference current value range, if the voltage value received by the central processing unit is not within the reference voltage value range, the central processing unit controls the voltage regulator to regulate the current value to be within the reference voltage value range, if the vibration value received by the central processing unit is larger than or equal to the reference vibration value, the central processing unit controls the alarm to perform alarm operation, and the central processing unit transmits the received current value, the received voltage value and the received vibration value to the remote monitoring end through the wireless transmitter.
Specifically, if the current value received by the central processing unit is not within the reference current value range, the central processing unit controls the current regulator to adjust the current value to the reference current value range, and the current regulator is a resistance regulator which is connected in series with a power supply line of the display and is controlled by the central processing unit.
Specifically, if the voltage value received by the central processing unit is not within the reference voltage value range, the central processing unit controls the voltage regulator to adjust the current value to be within the reference voltage value range, and the voltage regulator is a voltage divider connected in series with a power supply line of the display and controlled by the central processing unit.
Specifically, the input signal conditioner comprises a field effect tube M1-M8, a reference voltage Vb is connected with the grid of a field effect tube M5, the source of the field effect tube M5 is connected with one end of a second current source I2, one end of a second current source I2 is connected with a voltage Vss, the source of the field effect tube M5 is also connected with the source of the field effect tube M6, the drain of the field effect tube M5 is connected with the source of the field effect tube M7, the drain of the field effect tube M7 is connected, the source of the field effect tube M7 is connected with the grid of the field effect tube M7, the drain of the field effect tube M7 is connected with the voltage Vcc, the gate of the field effect tube M7 is connected with the gate of the field effect tube M8, the drain of the field effect tube M8 is connected with the voltage Vcc, the source of the field effect tube M8 is connected with the cathode of a diode, the drain of the field effect tube M6 is connected with the source of the field, the signal Vin input into the display is input from the gate of the fet M1, the source of the fet M1 is connected to one end of the first current source I1, the other end of the first current source I1 is connected to the voltage Vss, the source of the fet M1 is connected to the source of the fet M2, the drain of the fet M3 is connected to the voltage Vcc, the source of the fet M3 is connected to the gate of the fet M3, the gate of the fet M3 is connected to the gate of the fet M4, the drain of the fet M4 is connected to the voltage Vcc, the source of the fet M4 is connected to the anode of the diode, the drain of the fet M2 is connected to the source of the fet M4, the gate of the fet M2 is connected to the drain of the fet M2, and the gate output signal Vout of the fet M2 is connected to the display.
Specifically, the input signal conditioner comprises a field effect tube M1-M10, a reference voltage Vb connected with the gate of the field effect tube M5, the source of the field effect tube M5 connected with one end of a second current source I2, one end of a second current source I2 connected with a voltage Vss, the source of the field effect tube M5 further connected with the source of the field effect tube M6, the drain of the field effect tube M5 connected with the source of the field effect tube M7, the drain of the field effect tube M7 connected with the drain of the field effect tube M7 connected with the gate of the field effect tube M7, the drain of the field effect tube M7 connected with a voltage Vcc, the gate of the field effect tube M7 connected with the gate of the field effect tube M8, the drain of the field effect tube M8 connected with a voltage, the source of the field effect tube M8 connected with the source of the field effect tube M9, the source of the field effect tube M9 connected with the gate of the field effect tube M10, the drain of the field effect tube M9 connected with a voltage, the drain of the, the gate of fet M6 is connected to the gate of fet M1, the signal Vin to be input to the display is input from the gate of fet M1, the source of fet M1 is connected to one end of a first current source I1, the other end of the first current source I1 is connected to voltage Vss, the source of fet M1 is connected to the source of fet M2, the drain of fet M3 is connected to voltage Vcc, the source of fet M3 is connected to the gate of fet M3, the gate of fet M3 is connected to the gate of fet M4, the drain of fet M4 is connected to voltage Vcc, the source of fet M3 is connected to the source of fet M10, the gate of fet M10 is connected to the gate of fet M9, the drain of fet M10 is connected to voltage, the drain of fet M2 is connected to the source of fet M4, the drain of fet M2 is connected to the drain of fet M2, the gate output signal Vout of the fet M2 is connected to the display.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention provides an intelligent display tool based on a sensing technology, which utilizes an outer frame, a display placing area, a display and an intelligent display tool control system, wherein the center part of the outer frame is provided with the display placing device, the display is arranged in the display placing device, the intelligent display tool control system is arranged on the outer frame, a current sensor is used for monitoring a current signal of a power supply circuit of the display, a voltage sensor is used for monitoring a voltage signal of the power supply circuit of the display, a vibration sensor is used for monitoring a vibration signal of the outer frame, and an input signal conditioner is used for carrying out undistorted conditioning on a signal input into the display.
(2) The invention provides an intelligent display tool based on sensing technology, and the invention also discloses that the input signal conditioner sets a constant k to be in a fixed relation with the current quantity ratio of a first current source I1 and a second current source I2, so that the transconductance gm2 is smaller than the gm1, and the gm2/gm1 is smaller than 1, for example, the channel width-to-length ratio W1/L1 of field effect tubes M1 and M2 and the channel width-to-length ratio W2/L2 of field effect tubes M5 and M6 are set to be W1/L1 > W2/L2, or the current value of the first current source I1 and the current value of the second current source I2 are set to be I1 > I2, and the inhibition amount r = gm2/gm1 when Vin is larger than Vb is in the range of [0,1], so that a non-distorted signal Vout can be obtained.
Drawings
FIG. 1 is a schematic diagram of an intelligent presentation tool based on sensing technology in accordance with the present invention;
FIG. 2 is a schematic diagram of the intelligent control system of the presentation tool of the present invention;
FIG. 3 is a schematic diagram of a first embodiment of an input signal conditioner of the present invention;
fig. 4 is a diagram of a second embodiment of the input signal conditioner of the present invention.
Description of the drawings:
10-an outer frame; 20-a display placement area; 21-a display; 30-display tool intelligent control system; 50-Intelligent presentation tool based on sensing technology.
Detailed Description
The intelligent display tool based on sensing technology provided by the invention is described in detail below with reference to the accompanying drawings and embodiments.
As shown in fig. 1-2, the intelligent display tool based on sensing technology provided by the present invention comprises an outer frame 10, a display placing area 20, a display 21, and an intelligent display tool control system 30, wherein the display placing area 20 is disposed at a central portion of the outer frame 10, the display 21 is disposed in the display placing area 20, and the intelligent display tool control system 30 is disposed on the outer frame 10.
The intelligent display tool 50 based on the sensing technology comprises a current sensor, a voltage sensor, a vibration sensor, a data acquisition card, a current regulator, a central processing unit, a voltage regulator, an alarm, an input signal conditioner and a wireless transmitter; the current sensor is used for monitoring a current signal of a power supply line of the display 21, the voltage sensor is used for monitoring a voltage signal of the power supply line of the display 21, the vibration sensor is used for monitoring a vibration signal of the outer frame 10, the output end of the current sensor, the output end of the voltage sensor and the output end of the vibration sensor are connected with the input end of the data acquisition card, the output end of the data acquisition card is connected with the input end of the central processing unit, the current sensor transmits an acquired current value to the central processing unit through the data acquisition card, the voltage sensor transmits an acquired voltage value to the central processing unit through the data acquisition card, and the vibration sensor transmits an acquired vibration value to the central processing unit through the data acquisition card, the central processing unit stores a reference current value range, a reference voltage value range and a reference vibration value, if the current value received by the central processing unit is in the reference current value range, the voltage value is in the reference voltage value range and the vibration value is smaller than the reference vibration value, the central processing unit controls the input signal conditioner to condition the signal input to the display 21 without distortion, if the current value received by the central processing unit is not in the reference current value range, the central processing unit controls the current regulator to regulate the current value to be in the reference current value range, if the voltage value received by the central processing unit is not in the reference voltage value range, the central processing unit controls the voltage regulator to regulate the current value to be in the reference voltage value range, if the vibration value received by the central processing unit is larger than or equal to the reference vibration value, the central processing unit controls the alarm to alarm, and transmits the received current value, voltage value and vibration value to the remote monitoring end through the wireless transmitter.
In the above embodiment, an outer frame, a display placing area, a display, and an intelligent control system of a display tool are utilized, wherein the center part of the outer frame is provided with the display placing device, the display is arranged in the display placing device, the intelligent control system of the display tool is arranged on the outer frame, a current sensor is used for monitoring a current signal of a power supply line of the display, a voltage sensor is used for monitoring a voltage signal of the power supply line of the display, a vibration sensor is used for monitoring a vibration signal of the outer frame, and an input signal conditioner is used for conditioning a signal input to the display without distortion.
Preferably, if the current value received by the central processing unit is not within the reference current value range, the central processing unit controls the current regulator to adjust the current value to be within the reference current value range, and the current regulator is a resistance regulator connected in series to the power supply line of the display 21 and controlled by the central processing unit.
Preferably, if the voltage value received by the central processing unit is not within the reference voltage value range, the central processing unit controls the voltage regulator to adjust the current value to be within the reference voltage value range, and the voltage regulator is a voltage divider connected in series to the power supply line of the display 21 and controlled by the central processing unit.
As shown in fig. 3, fig. 3 is a circuit structure diagram of the input signal conditioner connected to the display 21, which includes a fet M1-M8, a reference voltage Vb connected to the gate of the fet M5, the source of the fet M5 connected to one end of a second current source I2, one end of the second current source I2 connected to a voltage Vss, the source of the fet M5 further connected to the source of the fet M6, the drain of the fet M5 connected to the source of the fet M7, the drain of the fet M7 connected to the drain of the fet M7 connected to the gate of the fet M7, the drain of the fet M7 connected to the voltage Vcc, the gate of the fet M7 connected to the gate of the fet M8, the drain of the fet M8 connected to the voltage Vcc, the source of the fet M8 connected to the cathode of the diode, the drain of the fet M6 connected to the source of the fet M8, the gate of the fet M6 is connected to the gate of the fet M1, the signal Vin input to the display 21 is input from the gate of the fet M1, the source of the fet M1 is connected to one end of the first current source I1, the other end of the first current source I1 is connected to the voltage Vss, the source of the fet M1 is connected to the source of the fet M2, the drain of the fet M3 is connected to the voltage Vcc, the source of the fet M3 is connected to the gate of the fet M3, the gate of the fet M3 is connected to the gate of the fet M4, the drain of the fet M4 is connected to the voltage Vcc, the source of the fet M4 is connected to the anode of the diode, the drain of the fet M2 is connected to the source of the fet M4, the gate of the fet M2 is connected to the drain of the fet M2, and the gate output signal Vout of the fet M2 is connected to the display 21.
In the above embodiment, if Vout/Vin =1-gm2/gm1 is greater than or equal to 0, it means that the input signal Vin is not distorted, and at this time, gm2/gm1 needs to be smaller than 1, gm2 is the transconductance of the circuit composed of fets M5-M6, and gm1 is the transconductance of the circuit composed of fets M1-M4.
At this time, there are:
wherein k1 is a k constant of field effect transistors M1 and M2 forming the first differential pair circuit, k2 is a k constant of field effect transistors M5 and M6 forming the second differential pair circuit, I1 is a current value of the first current source I1, I2 is a current value of the second current source I2, μ 0 is an electron transfer degree, C0 is a capacity parameter of the field effect transistors M1, M2, M5 and M6, W1/L1 is a ratio of a channel width and a length of the field effect transistor M1 or M2, and W2/L2 is a ratio of a channel width and a length of the field effect transistor M5 or M6.
Therefore, in the above circuit configuration, the above constant k is set in a fixed relationship with the ratio of the current amounts of the first current source I1 and the second current source I2, so that the transconductance gm2 is smaller than gm1, and gm2/gm1 is smaller than 1, for example, the channel width-to-length ratio W1/L1 of the field effect transistors M1 and M2 and the channel width-to-length ratio W2/L2 of the field effect transistors M5 and M6 are set to W1/L1 > W2/L2, or the current value of the first current source I1 and the current value of the second current source I2 are set to I1 > I2, and the suppression amount r = 2/gm1 when Vin is larger than Vb is in the range of [0,1], and therefore, an undistorted signal Vout can be obtained.
As shown in fig. 4, fig. 4 is another structural diagram of the circuit of the input signal conditioner connected to the display 21, which includes fets M1-M10, the reference voltage Vb is connected to the gate of fet M5, the source of fet M5 is connected to one end of the second current source I2, one end of the second current source I2 is connected to voltage Vss, the source of fet M5 is further connected to the source of fet M6, the drain of fet M5 is connected to the source of fet M7, the drain of fet M7, the source of fet M7 is connected to the gate of fet M7, the drain of fet M7 is connected to voltage Vcc, the gate of fet M7 is connected to the gate of fet M8, the drain of fet M8 is connected to voltage Vcc, the source of fet M8 is connected to the source of fet M9, the source of fet M9 is connected to the gate of fet 10, the drain of fet M9 is connected to a voltage Vcc, the drain of fet M6 is connected to the source of fet M8, the gate of fet M6 is connected to the gate of fet M1, a signal Vin to be inputted to the display 21 is inputted from the gate of fet M1, the source of fet M1 is connected to one end of a first current source I1, the other end of the first current source I1 is connected to a voltage Vss, the source of fet M1 is connected to the source of fet M2, the drain of fet M3 is connected to a voltage Vcc, the source of fet M3 is connected to the gate of fet M3, the gate of fet M3 is connected to the gate of fet M4, the drain of fet M4 is connected to a voltage Vcc, the source of fet M3 is connected to the source of fet M10, the gate of fet M10 is connected to the gate of fet M9, the drain of fet M10 is connected to a voltage Vcc, the drain of the field effect transistor M2 is connected to the source of the field effect transistor M4, the gate of the field effect transistor M2 is connected to the drain of the field effect transistor M2, and the gate output signal Vout of the field effect transistor M2 is connected to the display 21.
In the above embodiment, the fets M9 and M10 form a current mirror structure, when Vin is greater than Vb, the electrical signal is folded back in the current mirror structure formed by the fets M9 and M10, and the drain current of the fet M1 and the source current of the fet M3 are merged, so that the merged current Ic = Vin × gm2, n × Ic = (Vin-Vout) × gm1, where n is the current mirror ratio formed by the fets M9 and M10, so that Vout/Vin =1-n × gm2/gm1, and when Vin is less than or equal to Vb, the fets M9 and M10 form a current mirror circuit with substantially no current flowing, and the input and output gain is 0 db.
When Vin is greater than Vb, the circuit restraining amount r = n × gm2/gm1 can make the error of the fet caused by temperature be mutually resisted by gm1 and gm2, and further obtain stable and good precision characteristics, in the above embodiment, r is required to be less than 1, when n is less than 1, W9/L9 is greater than W10/L10, W9/L9 is the ratio of the channel width to the length of the fet M9, and W10/L10 is the ratio of the channel width to the length of the fet M10, so that the undistorted signal Vout can be obtained.
Finally, it is noted that the above-mentioned embodiments illustrate rather than limit the invention, and that, while the invention has been described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. The intelligent display tool based on the sensing technology is characterized in that the intelligent display tool (50) based on the sensing technology comprises an outer frame (10), a display placing area (20), a display (21) and a display tool intelligent control system (30), wherein the display placing device (20) is arranged at the central part of the outer frame (10), the display (21) is arranged in the display placing device (20), and the display tool intelligent control system (30) is arranged on the outer frame (10);
the intelligent display tool (50) based on the sensing technology comprises a current sensor, a voltage sensor, a vibration sensor, a data acquisition card, a current regulator, a central processing unit, a voltage regulator, an alarm, an input signal conditioner and a wireless transmitter; the current sensor is used for monitoring a current signal of a power supply line of the display (21), the voltage sensor is used for monitoring a voltage signal of the power supply line of the display (21), the vibration sensor is used for monitoring a vibration signal of the outer frame (10), the output end of the current sensor, the output end of the voltage sensor and the output end of the vibration sensor are all connected with the input end of the data acquisition card, the output end of the data acquisition card is connected with the input end of the central processing unit, the current sensor transmits the acquired current value to the central processing unit through the data acquisition card, the voltage sensor transmits the acquired voltage value to the central processing unit through the data acquisition card, and the vibration sensor transmits the acquired vibration value to the central processing unit through the data acquisition card, the central processing unit stores a reference current value range, a reference voltage value range and a reference vibration value, if the current value received by the central processing unit is in the reference current value range, the voltage value is in the reference voltage value range and the vibration value is smaller than the reference vibration value, the central processing unit controls the input signal conditioner to condition the signal input to the display (21) without distortion, if the current value received by the central processing unit is not in the reference current value range, the central processing unit controls the current regulator to regulate the current value to be in the reference current value range, and if the voltage value received by the central processing unit is not in the reference voltage value range, the central processing unit controls the voltage regulator to regulate the current value to be in the reference voltage value range, if the vibration value received by the central processing unit is larger than or equal to the reference vibration value, the central processing unit controls the alarm to alarm, and the central processing unit transmits the received current value, voltage value and vibration value to a remote monitoring end through the wireless transmitter.
2. The smart display tool based on sensing technology as claimed in claim 1, wherein if the current value received by the central processor is not within the reference current value range, the central processor controls the current regulator to adjust the current value to be within the reference current value range, wherein the current regulator is a resistance regulator connected in series with the power supply line of the display (21) and controlled by the central processor.
3. The smart display tool based on sensing technology as claimed in claim 1, wherein if the voltage value received by the central processor is not within the reference voltage value range, the central processor controls the voltage regulator to adjust the current value to be within the reference voltage value range, and the voltage regulator is a voltage divider connected in series with the power supply line of the display (21) and controlled by the central processor.
4. The intelligent display tool based on sensing technology of claim 1, wherein the input signal conditioner comprises a field effect transistor M1-M8, the reference voltage Vb is connected with the gate of the field effect transistor M5, the source of the field effect transistor M5 is connected with one end of a second current source I2, one end of the second current source I2 is connected with the voltage Vss, the source of the field effect transistor M5 is further connected with the source of the field effect transistor M6, the drain of the field effect transistor M5 is connected with the source of the field effect transistor M7, the drain of the field effect transistor M7 is connected, the source of the field effect transistor M7 is connected with the gate of the field effect transistor M7, the drain of the field effect transistor M7 is connected with the voltage Vcc, the gate of the field effect transistor M7 is connected with the gate of the field effect transistor M8, the drain of the field effect transistor M8 is connected with the voltage Vcc, the source of the field effect transistor M8 is connected with the cathode of a diode, the drain of the field effect transistor, the gate of the field effect transistor M6 is connected to the gate of the field effect transistor M1, the signal Vin input to the display (21) is input from the gate of the field effect transistor M1, the source of the field effect transistor M1 is connected to one end of the first current source I1, the other end of the first current source I1 is connected to the voltage Vss, the source of the field effect transistor M1 is connected to the source of the field effect transistor M2, the drain of the field effect transistor M3 is connected to the voltage Vcc, the source of the field effect transistor M3 is connected to the gate of the field effect transistor M3, the gate of the field effect transistor M3 is connected to the gate of the field effect transistor M4, the drain of the field effect transistor M4 is connected to the voltage Vcc, the source of the field effect transistor M4 is connected to the anode of the diode, the drain of the field effect transistor M2 is connected to the source of the field effect transistor M4, the gate of the field effect transistor M2 is connected to the drain of the field effect transistor M.
5. The intelligent display tool based on sensing technology of claim 1, wherein the input signal conditioner comprises a field effect transistor M1-M10, the reference voltage Vb is connected with the gate of the field effect transistor M5, the source of the field effect transistor M5 is connected with one end of a second current source I2, one end of the second current source I2 is connected with the voltage Vss, the source of the field effect transistor M5 is further connected with the source of the field effect transistor M6, the drain of the field effect transistor M5 is connected with the source of the field effect transistor M7, the drain of the field effect transistor M7 is connected, the source of the field effect transistor M7 is connected with the gate of the field effect transistor M7, the drain of the field effect transistor M7 is connected with the voltage Vcc, the gate of the field effect transistor M7 is connected with the gate of the field effect transistor M8, the drain of the field effect transistor M8 is connected with the voltage Vcc, the source of the field effect transistor M8 is connected with the source of the field effect transistor M9, the source of the field effect, the drain of the fet M9 is connected to the voltage Vcc, the drain of the fet M6 is connected to the source of the fet M8, the gate of the fet M6 is connected to the gate of the fet M1, the signal Vin input to the display (21) is input from the gate of the fet M1, the source of the fet M1 is connected to one end of the first current source I1, the other end of the first current source I1 is connected to the voltage Vss, the source of the fet M1 is connected to the source of the fet M2, the drain of the fet M3 is connected to the voltage Vcc, the source of the fet M3 is connected to the gate of the fet M3, the gate of the fet M3 is connected to the gate of the fet M4, the drain of the fet M4 is connected to the voltage, the source of the fet M3 is connected to the source of the fet M10, the gate of the fet M10 is connected to the gate of the fet M9, the drain of the fet M10 is connected to the voltage Vcc, the drain electrode of the field effect transistor M2 is connected with the source electrode of the field effect transistor M4, the gate electrode of the field effect transistor M2 is connected with the drain electrode of the field effect transistor M2, and the gate electrode output signal Vout of the field effect transistor M2 is connected with the display (21).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010465599.1A CN111487457A (en) | 2020-05-28 | 2020-05-28 | Intelligent display tool based on sensing technology |
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