CN209433834U - A kind of high definition zoom projector - Google Patents
A kind of high definition zoom projector Download PDFInfo
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- CN209433834U CN209433834U CN201920190657.7U CN201920190657U CN209433834U CN 209433834 U CN209433834 U CN 209433834U CN 201920190657 U CN201920190657 U CN 201920190657U CN 209433834 U CN209433834 U CN 209433834U
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- projector
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Abstract
The utility model discloses a kind of high definition zoom projectors, it include: the starting key being arranged in projector, the starting key lotus root is connected to boot-strap circuit, and boot-strap circuit includes: 3rd resistor, the 4th resistance, the 5th resistance, the first triode, the second triode, the second diode, power conversion chip and single-chip microcontroller；The emitter of first triode connects DC input；By the way that boot-strap circuit is arranged, the normal boot-strap of projector can be rapidly completed, by using single-chip microcontroller, simplify the hardware connection structure of circuit, reduce circuit components, reduce circuit structure accounts for plate suqare；By the way that shutdown circuit is arranged, delay switching-off is carried out to projector, avoids due to misoperation or power-off suddenly causes to be lost to the light bulb or liquid crystal board of projector, extend the service life of projector；By being respectively set for boot-strap circuit and shutdown circuit, different keys is carried out to the switching on and shutting down of projector and is arranged, convenient for the maintenance management to projector.
Description
Technical field
The utility model belongs to projector's technical field, and in particular to a kind of high definition zoom projector.
Background technique
Projector, also known as projector are a kind of equipment that can be projected image or video on curtain, can be by not
The same computer of interface together, VCD, DVD, BD, game machine, DV etc. are connected, and play corresponding vision signal；Projector is wide at present
It is general to be applied to family, office, school and public place of entertainment, according to working method difference, there is a CRT, the different types such as LCD, DLP,
To meet market development, the more and more high-end change of the function of projector, high definition zoom becomes the basic function of projector, as sale
Attraction.
The power-on operation of existing high definition zoom projector generallys use starting key, but the boot-strap circuit of starting key connection
Structure is complicated, and boot-strap circuit accounts for that plate suqare is big, is unfavorable for the miniaturization of high definition zoom projector, simultaneously because projector
Interior part accumulated temperature easy to form, if shutdown when power off suddenly, will cause temperature scatter and disappear do not go out, when being then turned on projector at this time,
The service life of light bulb in projector can be shortened because of overheat, and then shorten the service life of projector.
Utility model content
To overcome technological deficiency of the existing technology, the utility model discloses a kind of high definition zoom projectors.
Technical solution adopted by the utility model to solve its technical problems is a kind of high definition zoom projectors, comprising: throws
The starting key being arranged on shadow machine, the starting key lotus root are connected to boot-strap circuit, and boot-strap circuit includes: 3rd resistor, the 4th electricity
Resistance, the 5th resistance, the first triode, the second triode, the second diode, power conversion chip and single-chip microcontroller；
The emitter of first triode connects DC input, the collector connection power supply conversion of the first triode
The VIN pin of chip, the power end of the VOUT pin connection single-chip microcontroller of power conversion chip；The GND pin of power conversion chip
Ground connection, the base stage of the first triode connect the first end of starting key by the 4th resistance, and the second end of starting key is grounded, the
It is connected with 3rd resistor between the emitter and base stage of one triode, the common end of 3rd resistor and the 4th resistance passes through the 5th electricity
The collector of resistance the second triode of connection, the emitter ground connection of the second triode, the base stage connection single-chip microcontroller of the second triode
The port I/O, the first end of starting key are also connected with the cathode of the second diode, the I/ of the anode connection single-chip microcontroller of the second diode
O port, single-chip microcontroller and projector's control connect.
Preferably, the 6th resistance is also connected between the base stage of second triode and the port I/O of single-chip microcontroller.
Preferably, the VIN pin of the power conversion chip and VOUT pin pass through the second capacitor and third capacitor respectively
Ground connection.
Preferably, the chip model that the power conversion chip uses is XC6203.
Preferably, the DC input is also connected with ac-dc converter circuit, and the ac-dc converter circuit includes:
ACDC power supply chip, first resistor, second resistance, first capacitor and first diode, ACDC power supply chip are used for alternating current
Source be converted to DC power supply output, be connected in series between the DC power output end and ground of ACDC power supply chip first resistor and
The common end of second resistance, first resistor and second resistance is grounded by first capacitor, first resistor and second resistance it is public
End is also connected with the anode of first diode, and the cathode of first diode is the transmitting that DC input connects the first triode
Pole.
Preferably, normally closed open is additionally provided between the collector of first triode and the VIN pin of power conversion chip
It closes, the normally closed switch lotus root is connected to shutdown circuit, and the shutdown circuit includes: external power supply, relay, third transistor, 555
Chip, the 4th capacitor, the 5th capacitor, the 8th resistance and shutdown key；
One end of the relay connects external power supply, and the other end of relay connects the collector of third transistor, the
The emitter of three triodes is grounded, and the base stage of third transistor connects the third pin of 555 chips, the 5th pin of 555 chips
By the 4th capacity earth, the 4th pin of 555 chips connect external power supply with the 8th pin, and the 6th pin of 555 chips is logical
The 5th capacity earth is crossed, the 6th pin of 555 chips also passes through the 8th resistance connection external power supply, the second pin of 555 chips
One end of the 5th capacitor is connected, the both ends of the 5th capacitor are connected in parallel to shutdown key, and shutdown key is set in projector.
Preferably, the 7th resistance is connected between the base stage of the third transistor and the third pin of 555 chips.
Preferably, the chip model of the ACDC power supply chip is TMF0165.
The beneficial effects of the utility model are: the normal boot-strap of projector can be rapidly completed by setting boot-strap circuit, lead to
It crosses using single-chip microcontroller, simplifies the hardware connection structure of circuit, reduce circuit components, reduce circuit structure accounts for plate suqare；It is logical
Setting shutdown circuit is crossed, delay switching-off is carried out to projector, avoids powering off the light bulb to projector due to misoperation or suddenly
Or liquid crystal board causes to be lost, and extends the service life of projector；By being respectively set for boot-strap circuit and shutdown circuit, to throwing
The switching on and shutting down of shadow machine carry out different key settings, convenient for the maintenance management to projector.
Detailed description of the invention
Fig. 1 is the circuit diagram of boot-strap circuit described in the utility model.
Fig. 2 is the circuit diagram of shutdown circuit described in the utility model.
Appended drawing reference: ACDC- ACDC power supply chip, R1- first resistor, R2- second resistance, C1- first capacitor, D1-
One diode, R3- 3rd resistor, the 4th resistance of R4-, the 5th resistance of R5-, the first triode of T1-, the second triode of T2-, D2-
Second diode, IC1- power conversion chip, VIN-VIN pin, VOUT-VOUT pin, K1- starting key, the 6th electricity of R6-
Resistance, the second capacitor of C2-, C3- third capacitor, K2- normally closed switch, VCC- external power supply, J- relay, T3- third transistor,
555-555 chip, the 4th capacitor of C4-, the 5th capacitor of C5-, the 8th resistance of R8-, K3- shutdown key, the 7th resistance of R7-, AC-
AC power source.
Specific embodiment
More detailed description is done to the embodiments of the present invention below in conjunction with attached drawing and appended drawing reference, makes to be familiar with ability
The technology people in domain can implement accordingly after studying this specification carefully.It should be appreciated that specific embodiment described herein is only to solve
The utility model is released, is not used to limit the utility model.
A kind of high definition zoom projector, comprising: the starting key K1 being arranged in projector, the starting key K1 lotus root are connected to
Boot-strap circuit, boot-strap circuit include: 3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the first triode T1, the two or three pole
Pipe T2, the second diode D2, power conversion chip IC1 and single-chip microcontroller；
The emitter of the first triode T1 connects DC input, and the collector of the first triode T1 connects power supply
The power end of the VOUT pin VOUT connection single-chip microcontroller of VIN the pin VIN, power conversion chip IC1 of conversion chip IC1；Power supply
The GND pin of conversion chip IC1 is grounded, and the base stage of the first triode T1 passes through the first of the 4th resistance R4 connection starting key K1
End, the second end ground connection of starting key K1, is connected with 3rd resistor R3, third between the emitter and base stage of the first triode T1
The common end of resistance R3 and the 4th resistance R4 pass through the collector of the 5th resistance R5 the second triode of connection T2, the second triode T2
Emitter ground connection, the port I/O of the base stage connection single-chip microcontroller of the second triode T2, the first end of starting key K1 is also connected with the
The cathode of two diode D2, the port I/O of the anode connection single-chip microcontroller of the second diode D2, single-chip microcontroller and projector's control connect
It connects；
Specifically, the working principle of the boot-strap circuit are as follows: when needing to be switched on, press the booting that is arranged in projector by
Key K1, the base voltage of the first triode T1 is pulled low at this time, and the first triode T1 is PNP type triode, the first triode T1
Low level signal conducting is received, due to the conducting of the first triode T1, voltage input to the power supply of DC input converts core
The VIN pin VIN of piece IC1 carries out voltage conversion, and the VOUT pin VOUT output of power conversion chip IC1 is supplied for single-chip microcontroller at this time
The voltage of electricity, single-chip microcontroller power control projector are switched on, and do not illustrate to single-chip microcontroller in above-mentioned boot-strap circuit, with text pair
Its connection relationship carries out understanding signal；
After single-chip microcontroller powers on, start to initialize, the port I/O of single-chip microcontroller can be set to high level, monolithic by general initialization
After the completion of machine initialization, dragged down after the second diode D2 that the port I/O of single-chip microcontroller passes through conducting by starting key K1, the two or two
The I/O Port detecting of single-chip microcontroller at pole pipe D2 anode illustrates that starting key K1 is pressed to low level signal, and confirmation booting is normal
Operation, simultaneously as the port I/O of single-chip microcontroller is set to high level, the base stage of the second triode T2 receives high level signal at this time
Conducting, the second triode T2 are NPN type triode, and since the conducting of the second triode T2 is grounded, the first triode T1 is connect at this time
Lasting low level signal is received, instant on switch key K1 unclamps, and will not influence the on state of the first triode T1, monolithic
The output of function normal power supply, projector is in open state always；
By the way that boot-strap circuit is arranged, the normal boot-strap of projector can be rapidly completed, by using single-chip microcontroller, simplify circuit
Hardware connection structure reduces circuit components, and reduce circuit structure accounts for plate suqare.
The 6th resistance R6 is also connected between the base stage of the second triode T2 and the port I/O of single-chip microcontroller；Described
Six resistance R6 are current-limiting resistance, improve the stability and reliability of boot-strap circuit.
The VIN pin VIN and VOUT pin VOUT of the power conversion chip IC1 passes through the second capacitor C2 and third respectively
Capacitor C3 ground connection；The second capacitor C2 is anti-interference capacitor, improves the anti-of the VIN pin VIN input of power conversion chip IC1
Interference, third capacitor C3 are filter capacitor, so that the voltage that the VOUT pin VOUT of power conversion chip IC1 is exported is more flat
It is sliding, it is more stable.
The chip model that the power conversion chip IC1 is used is XC6203.
The DC input is also connected with ac-dc converter circuit, and the ac-dc converter circuit includes: ACDC electricity
Source chip ACDC, first resistor R1, second resistance R2, first capacitor C1 and first diode D1, ACDC power supply chip ACDC are used
It is exported in AC power source is converted to DC power supply, the company of series connection between the DC power output end and ground of ACDC power supply chip ACDC
It is connected to first resistor R1 and second resistance R2, the common end of first resistor R1 and second resistance R2 are grounded by first capacitor C1,
The common end of first resistor R1 and second resistance R2 are also connected with the anode of first diode D1, and the cathode of first diode D1 is straight
Galvanic electricity input terminal connects the emitter of the first triode T1；The ACDC power supply chip converts alternating current to direct current electricity output,
Wherein first resistor R1 and second resistance R2 partial pressure reduce ACDC power supply chip output DC level, for rated supply voltage compared with
The devices such as low triode, the second diode D2 and single-chip microcontroller use；After first capacitor C1 provides a more stable partial pressure
Voltage, first diode D1 is for carrying out first time rectification.
Normally closed open is additionally provided between the collector of the first triode T1 and the VIN pin VIN of power conversion chip IC1
K2 is closed, the normally closed switch K2 lotus root is connected to shutdown circuit, and the shutdown circuit includes: external power supply VCC, relay J, the three or three
Pole pipe T3,555 chips 555, the 4th capacitor C4, the 5th capacitor C5, the 8th resistance R8 and shutdown key K3；
One end of the relay J connects external power supply VCC, the collection of the other end connection third transistor T3 of relay J
Electrode, the emitter ground connection of third transistor T3, the third pin of base stage 555 chips 555 of connection of third transistor T3,555
5th pin of chip 555 is grounded by the 4th capacitor C4, and the 4th pin of 555 chips 555 connect external electricity with the 8th pin
The 6th pin of source VCC, 555 chips 555 are grounded by the 5th capacitor C5, and the 6th pin of 555 chips 555 also passes through the 8th
Resistance R8 connection external power supply VCC, one end of the 5th capacitor C5 of second pin connection of 555 chips 555, the two of the 5th capacitor C5
End is connected in parallel to shutdown key K3, and shutdown key K3 is set in projector；
The working principle of the shutdown circuit are as follows: when shutdown is required, the shutdown key K3 being arranged in projector is pressed, this
When external power supply VCC charged to the 5th capacitor C5 by the 8th resistance R8, due to the 5th capacitor C5 underfill, 555 chips 555
Second pin triggering end is low level signal, and the third pin of 555 chips 555 exports high level signal, third transistor at this time
T3 receives high level signal cut-off, and third transistor T3 is PNP type triode, at this time relay J power loss, and normally closed switch K2 is still
In closed state, the VIN pin VIN of power conversion chip IC1 still has voltage output, and projector is in obtain electricity condition at this time,
Radiator fan in projector is continued working；After 5th capacitor C5 is full of, the second pin of 555 chips 555 inputs high
Level signal, the third pin overturning output low level signal of 555 chips 555, third transistor T3 are connected at this time, relay J
Must be electric, normally closed switch K2 is disconnected at this time, and the VIN pin VIN of power conversion chip IC1 does not have voltage input, and single-chip microcontroller power loss is thrown
Shadow organ machine；
By the way that shutdown circuit is arranged, delay switching-off is carried out to projector, avoids due to misoperation or power-off suddenly is to throwing
The light bulb or liquid crystal board of shadow machine cause to be lost, and extend the service life of projector, while can be when closing projector, projector
Inside is thoroughly cut off the power again after can be carried out sufficiently heat dissipation, improves the heat dissipation performance of projector, further extends making for projector
With the service life, and the structure of the shutdown circuit is simple, and circuit stability is reliable, by being respectively set for boot-strap circuit and shutdown circuit,
The switching on and shutting down of projector are carried out with different key settings, convenient for the maintenance management to projector.
The 7th resistance R7 is connected between the base stage of the third transistor T3 and the third pin of 555 chips 555；It is described
7th resistance R7 is current-limiting resistance, improves the reliability and stability of shutdown circuit.
The chip model of the ACDC power supply chip ACDC is TMF0165；TMF0165 chip is a high integration, height
The PWM+MOSFET of performance two-in-one current mode Off-line SMPS controller, is encapsulated using DIP8, circuit structure letter
It is single, it is at low cost, with the defencive function that over-voltage, under-voltage, excess temperature, overload, soft start, short circuit etc. are perfect.
The above content is the further descriptions made in conjunction with specific preferred embodiment to the utility model, cannot recognize
Determine specific embodiment of the present utility model to be only limited to these instructions.For the common skill of the utility model technical field
For art personnel, the other embodiments obtained in the case where not departing from the technical solution of the utility model be should be included in practical
In novel protection scope.
Claims (8)
1. a kind of high definition zoom projector, it is characterised in that: include: the starting key (K1) being arranged in projector, the booting
Key (K1) lotus root is connected to boot-strap circuit, and boot-strap circuit includes: 3rd resistor (R3), the 4th resistance (R4), the 5th resistance (R5),
One triode (T1), the second triode (T2), the second diode (D2), power conversion chip (IC1) and single-chip microcontroller；
The emitter of first triode (T1) connects DC input, and the collector of the first triode (T1) connects power supply
The VIN pin (VIN) of conversion chip (IC1), the power supply of VOUT pin (VOUT) the connection single-chip microcontroller of power conversion chip (IC1)
End；The GND pin of power conversion chip (IC1) is grounded, and the base stage of the first triode (T1) is opened by the connection of the 4th resistance (R4)
The first end of machine key (K1), the second end ground connection of starting key (K1), between the emitter and base stage of the first triode (T1)
It is connected with 3rd resistor (R3), the common end of 3rd resistor (R3) and the 4th resistance (R4) passes through the 5th resistance (R5) connection second
The collector of triode (T2), the emitter ground connection of the second triode (T2), the base stage of the second triode (T2) connect single-chip microcontroller
The port I/O, the first end of starting key (K1) is also connected with the cathode of the second diode (D2), the anode of the second diode (D2)
The port I/O of single-chip microcontroller is connected, single-chip microcontroller and projector's control connect.
2. a kind of high definition zoom projector as described in claim 1, it is characterised in that: the base stage of second triode (T2)
The 6th resistance (R6) is also connected between the port I/O of single-chip microcontroller.
3. a kind of high definition zoom projector as described in claim 1, it is characterised in that: the power conversion chip (IC1)
VIN pin (VIN) and VOUT pin (VOUT) are grounded by the second capacitor (C2) and third capacitor (C3) respectively.
4. a kind of high definition zoom projector as claimed in claim 3, it is characterised in that: the power conversion chip (IC1) is adopted
Chip model is XC6203.
5. a kind of high definition zoom projector as described in claim 1, it is characterised in that: the DC input is also connected with
Ac-dc converter circuit, the ac-dc converter circuit include: ACDC power supply chip (ACDC), first resistor (R1), the second electricity
(R2), first capacitor (C1) and first diode (D1) are hindered, ACDC power supply chip (ACDC) is for being converted to directly AC power source
Galvanic electricity source output, be connected in series between the DC power output end and ground of ACDC power supply chip (ACDC) first resistor (R1) and
The common end of second resistance (R2), first resistor (R1) and second resistance (R2) is grounded by first capacitor (C1), first resistor
(R1) and the common end of second resistance (R2) is also connected with the anode of first diode (D1), and the cathode of first diode (D1) is straight
Galvanic electricity input terminal connects the emitter of the first triode (T1).
6. a kind of high definition zoom projector as described in claim 1, it is characterised in that: the current collection of first triode (T1)
It is additionally provided with normally closed switch (K2) between pole and the VIN pin (VIN) of power conversion chip (IC1), normally closed switch (K2) lotus root
It is connected to shutdown circuit, the shutdown circuit includes: external power supply (VCC), relay (J), third transistor (T3), 555 chips
(555), the 4th capacitor (C4), the 5th capacitor (C5), the 8th resistance (R8) and shutdown key (K3)；
One end of the relay (J) connects external power supply (VCC), and the other end of relay (J) connects third transistor (T3)
Collector, the emitter ground connection of third transistor (T3), the of the base stage connection 555 chips (555) of third transistor (T3)
Three pins, the 5th pin of 555 chips (555) are grounded by the 4th capacitor (C4), the 4th pin of 555 chips (555) and the
Eight pins connect external power supply (VCC), and the 6th pin of 555 chips (555) is grounded by the 5th capacitor (C5), 555 chips
(555) the 6th pin also passes through the 8th resistance (R8) connection external power supply (VCC), the second pin connection of 555 chips (555)
One end of 5th capacitor (C5), the both ends of the 5th capacitor (C5) are connected in parallel to shutdown key (K3), shutdown key (K3) setting
In in projector.
7. a kind of high definition zoom projector as claimed in claim 6, it is characterised in that: the base stage of the third transistor (T3)
The 7th resistance (R7) is connected between the third pin of 555 chips (555).
8. a kind of high definition zoom projector as claimed in claim 5, it is characterised in that: the ACDC power supply chip (ACDC)
Chip model is TMF0165.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920190657.7U CN209433834U (en) | 2019-02-12 | 2019-02-12 | A kind of high definition zoom projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920190657.7U CN209433834U (en) | 2019-02-12 | 2019-02-12 | A kind of high definition zoom projector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209433834U true CN209433834U (en) | 2019-09-24 |
Family
ID=67977922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920190657.7U Expired - Fee Related CN209433834U (en) | 2019-02-12 | 2019-02-12 | A kind of high definition zoom projector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209433834U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115278187A (en) * | 2022-09-27 | 2022-11-01 | 深圳市橙子数字科技有限公司 | Shutdown control circuit for projector and projector device |
-
2019
- 2019-02-12 CN CN201920190657.7U patent/CN209433834U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115278187A (en) * | 2022-09-27 | 2022-11-01 | 深圳市橙子数字科技有限公司 | Shutdown control circuit for projector and projector device |
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| CF01 | Termination of patent right due to non-payment of annual fee |