CN103475083B - A kind of power supply circuits of digital micro-mirror chip and digital micro-mirror chip - Google Patents
A kind of power supply circuits of digital micro-mirror chip and digital micro-mirror chip Download PDFInfo
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- CN103475083B CN103475083B CN201310452527.3A CN201310452527A CN103475083B CN 103475083 B CN103475083 B CN 103475083B CN 201310452527 A CN201310452527 A CN 201310452527A CN 103475083 B CN103475083 B CN 103475083B
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Abstract
The invention provides a kind of power supply circuits and digital micro-mirror chip of digital micro-mirror chip, power supply circuits comprise: the first electric pressure converter, the second electric pressure converter, tertiary voltage transducer, diode and the first capacitor; The supply voltage of acquisition can be converted to the first voltage, the second voltage and tertiary voltage and export by the first electric pressure converter respectively, the supply voltage of acquisition can be converted to the 4th voltage and export by the second electric pressure converter, the supply voltage of acquisition can be converted to the 5th voltage and export by tertiary voltage transducer, the anode of diode connects power supply, negative electrode connects the input of the second electric pressure converter and the input of tertiary voltage transducer, the positive plate of the first capacitor connects the negative electrode of diode, and negative plate connects earth terminal.When the unexpected power-off of the projector of not charged pool, the electricity that the first capacitor stores continues power supply a period of time can to the second electric pressure converter and tertiary voltage transducer, thus the lower electricity time of delay control four voltage and the 5th voltage.
Description
Technical field
The present invention relates to power supply circuits technical field, more particularly, relate to a kind of power supply circuits and digital micro-mirror chip of digital micro-mirror chip.
Background technology
Digital micro-mirror chip (Digital Micro mirror Device, DMD) is the crucial treatment element of digital light process (DigitalLight Procession, DLP) shadow casting technique, in order to realize the optical digital computing process of DLP shadow casting technique.DMD can provide 1,670 ten thousand kinds of colors and 256 sections of gray-levels, thus can guarantee the gorgeous exquisiteness of activity video picture color that DLP projector projects, naturally true to nature.
Due to the characteristic of DMD itself, five kinds of different supply power voltages are needed to power when DMD is normally worked, timing requirements is had during electricity under these five kinds different supply power voltages, three kinds of supply power voltages are wherein lower electricity first, postpone after a period of time, remaining two kinds of supply power voltages are lower electricity again, for the projector of not charged pool, when normal shutdown, this function can be realized by simple circuit.
But, when due to some abnormal conditions, when making the unexpected power-off of the projector of not charged pool, there will be the situation of five kinds of supply power voltages with electricity at present, therefore, easily damage caused to DMD.
Summary of the invention
In view of this; the invention provides a kind of power supply circuits and digital micro-mirror chip of digital micro-mirror chip; during power-off unexpected with the projector realizing not charged pool, still can meet the timing requirements of electricity under five kinds of different supply power voltages, not be damaged to protect digital micro-mirror chip.
Power supply circuits for digital micro-mirror chip, comprising: the first electric pressure converter, the second electric pressure converter, tertiary voltage transducer, diode and the first capacitor;
The input of described first electric pressure converter connects power supply, first output exports the first voltage that described first electric pressure converter conversion electric power voltage obtains, second output exports the second voltage that described first electric pressure converter changes the acquisition of described supply voltage, and the 3rd output exports the tertiary voltage that described first electric pressure converter changes the acquisition of described supply voltage;
The input of described second electric pressure converter connects the negative electrode of described diode, and the anode of described diode connects described power supply, and the output of described second electric pressure converter exports the 4th voltage that described second electric pressure converter changes the acquisition of described supply voltage;
The input of described tertiary voltage transducer connects the input of described second electric pressure converter, and output exports the 5th voltage that described tertiary voltage transducer changes the acquisition of described supply voltage;
The positive plate of described first capacitor connects the negative electrode of described diode, and negative plate connects earth terminal.
Preferably, also comprise: the second capacitor;
The positive plate of described second capacitor connects the negative electrode of described diode, and negative plate connects earth terminal.
Preferably, the capacitance of described first capacitor is identical with the capacitance of described second capacitor.
A kind of digital micro-mirror chip, comprising: the power supply circuits of digital micro-mirror chip, and digital micro-mirror chip body;
The power supply circuits of described digital micro-mirror chip comprise: the first electric pressure converter, the second electric pressure converter, tertiary voltage transducer, diode and the first capacitor;
The input of described first electric pressure converter connects power supply, first output exports the first voltage that described first electric pressure converter conversion electric power voltage obtains, second output exports the second voltage that described first electric pressure converter changes the acquisition of described supply voltage, and the 3rd output exports the tertiary voltage that described first electric pressure converter changes the acquisition of described supply voltage;
The input of described second electric pressure converter connects the negative electrode of described diode, and the anode of described diode connects described power supply, and the output of described second electric pressure converter exports the 4th voltage that described second electric pressure converter changes the acquisition of described supply voltage;
The input of described tertiary voltage transducer connects the input of described second electric pressure converter, and output exports the 5th voltage that described tertiary voltage transducer changes the acquisition of described supply voltage;
The positive plate of described first capacitor connects the negative electrode of described diode, and negative plate connects earth terminal;
First feeder ear of described digital micro-mirror chip body is connected with described first output of described first electric pressure converter; Second feeder ear is connected with described second output of described first electric pressure converter; 3rd feeder ear is connected with described 3rd output of described first electric pressure converter; 4th feeder ear is connected with the described output of described second electric pressure converter; 5th feeder ear is connected with the described output of described tertiary voltage transducer.
Preferably, also comprise: the second capacitor;
The positive plate of described second capacitor connects the negative electrode of described diode, and negative plate connects earth terminal.
Preferably, the capacitance of described first capacitor is identical with the capacitance of described second capacitor.
As can be seen from above-mentioned technical scheme, the invention provides a kind of power supply circuits and digital micro-mirror chip of digital micro-mirror chip, power supply circuits comprise: the first electric pressure converter, the second electric pressure converter, tertiary voltage transducer, diode and the first capacitor; The supply voltage of acquisition can be converted to the first voltage, the second voltage and tertiary voltage and export by the first electric pressure converter respectively, the supply voltage of acquisition can be converted to the 4th voltage and export by the second electric pressure converter, the supply voltage of acquisition can be converted to the 5th voltage and export by tertiary voltage transducer, the anode of diode connects power supply, negative electrode connects the input of the second electric pressure converter and the input of tertiary voltage transducer, the positive plate of the first capacitor connects the negative electrode of diode, and negative plate connects earth terminal.When the unexpected power-off of the projector of not charged pool; the electricity that first capacitor stores continues power supply a period of time can to the second electric pressure converter and tertiary voltage transducer; thus the lower electricity time of delay control four voltage and the 5th voltage; meet the timing requirements of digital micro-mirror chip to electricity under different power voltage, protect digital micro-mirror chip and be not damaged.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The circuit diagram of Fig. 1 a kind of power supply circuits of digital micro-mirror chip disclosed in the embodiment of the present invention;
The circuit diagram of Fig. 2 power supply circuits of another kind of digital micro-mirror chip disclosed in the embodiment of the present invention;
The schematic diagram of Fig. 3 a kind of digital micro-mirror chip disclosed in the embodiment of the present invention;
The schematic diagram of Fig. 4 another kind of digital micro-mirror chip disclosed in the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
See Fig. 1, the embodiment of the invention discloses a kind of circuit diagram of power supply circuits of digital micro-mirror chip, comprising: the first electric pressure converter 11, second electric pressure converter 12, tertiary voltage transducer 13, diode D1 and the first capacitor C1;
The input of the first electric pressure converter 11 connects power Vcc, the first output exports the first voltage U 1 that the first electric pressure converter 11 conversion electric power voltage obtains, second output export the first electric pressure converter 11 change described supply voltage obtain the second voltage U the 2, three output export the first electric pressure converter 11 change described supply voltage obtain tertiary voltage U3;
The input of the second electric pressure converter 12 connects the negative electrode of diode D1, and the anode of diode D1 connects power Vcc, and the output of the second electric pressure converter 12 exports the 4th voltage U 4 that the second electric pressure converter 12 changes the acquisition of described supply voltage;
The input of tertiary voltage transducer 13 connects the input of the second electric pressure converter 12, and output exports the 5th voltage U 5 that tertiary voltage transducer 13 changes the acquisition of described supply voltage;
The positive plate of the first capacitor C1 connects the negative electrode of diode D1, and negative plate connects earth terminal.
In summary it can be seen, when the projector of not charged pool normally works, the first capacitor C1 is in charged state; When the unexpected power-off of the projector of not charged pool; because the input of the second electric pressure converter 12 is connected with the input of tertiary voltage transducer 13; and be all connected with the positive plate of the first capacitor C1; therefore; the electricity that first capacitor C1 stores continues power supply a period of time can to the second electric pressure converter 12 and tertiary voltage transducer 13 simultaneously; thus the lower electricity time of delay control four voltage U 4 and the 5th voltage U 5; meet the timing requirements of digital micro-mirror chip to electricity under different power voltage, protect digital micro-mirror chip and be not damaged.
Wherein, the electricity that diode D1 can prevent the first capacitor C1 from storing is discharged by other loops.
First electric pressure converter 11, second electric pressure converter 12 and tertiary voltage transducer 13 can be all dc-dc.
The voltage of power Vcc can be 5V, and the voltage of the first voltage U 1 can be 8.5V, and the voltage of the second voltage U 2 can be the voltage of 16V, tertiary voltage U3 can be-10V, and the voltage of the 4th voltage U 4 can be 2.5V, and the voltage of the 5th voltage U 5 can be 1.9V.
On basis embodiment illustrated in fig. 1, see Fig. 2, the invention discloses the circuit diagram of the power supply circuits of another kind of digital micro-mirror chip, with embodiment illustrated in fig. 1 unlike, the embodiment shown in Fig. 2 also comprises: the second capacitor C2;
The positive plate of the second capacitor C2 connects the negative electrode of diode D1, and negative plate connects earth terminal.
Be understandable that, 4th voltage U 4 is relevant with the capacitance of the first capacitor C1 with the lower electric delay time of the 5th voltage U 5, when the electricity causing it to store because the capacitance of the first capacitor C1 is lower is not enough, the lower electric delay time of the 4th voltage U 4 and the 5th voltage U 5 may be made not meet the timing requirements of digital micro-mirror chip to electricity under supply power voltage, therefore, by increasing by the second capacitor C2, total electricity of storage can be increased, and then the lower electricity time of delay control four voltage U 4 and the 5th voltage U 5, meet the timing requirements of digital micro-mirror chip to electricity under supply power voltage.
Certainly, we can also make the first capacitor C1 into a capacitance larger electric capacity, or increase several capacitor according to actual needs more, and the present invention does not limit at this.
Preferably, the capacitance of the first capacitor C1 can be identical with the capacitance of the second capacitor C2, can be all 100uF.
Corresponding with the power supply circuits of above-mentioned digital micro-mirror chip, present invention also offers a kind of digital micro-mirror chip.
See Fig. 3, the invention discloses a kind of schematic diagram of digital micro-mirror chip, comprising: the power supply circuits 14 of digital micro-mirror chip, and digital micro-mirror chip body 15;
The power supply circuits 14 of digital micro-mirror chip comprise: the first electric pressure converter 11, second electric pressure converter 12, tertiary voltage transducer 13, diode D1 and the first capacitor C1;
The input of the first electric pressure converter 11 connects power Vcc, the first output exports the first voltage U 1 that the first electric pressure converter 11 conversion electric power voltage obtains, second output export the first electric pressure converter 11 change described supply voltage obtain the second voltage U the 2, three output export the first electric pressure converter 11 change described supply voltage obtain tertiary voltage U3;
The input of the second electric pressure converter 12 connects the negative electrode of diode D1, and the anode of diode D1 connects power Vcc, and the output of the second electric pressure converter 12 exports the 4th voltage U 4 that the second electric pressure converter 12 changes the acquisition of described supply voltage;
The input of tertiary voltage transducer 13 connects the input of the second electric pressure converter 12, and output exports the 5th voltage U 5 that tertiary voltage transducer 13 changes the acquisition of described supply voltage;
The positive plate of the first capacitor C1 connects the negative electrode of diode D1, and negative plate connects earth terminal;
First feeder ear of digital micro-mirror chip body 15 body is connected with described first output of the first electric pressure converter 11; Second feeder ear is connected with described second output of the first electric pressure converter 11; 3rd feeder ear is connected with described 3rd output of the first electric pressure converter 11; 4th feeder ear is connected with the described output of the second electric pressure converter 12; 5th feeder ear is connected with the described output of tertiary voltage transducer 13.
Wherein, the English full name of digital micro-mirror chip body 15 is Digital Micro mirror Device, referred to as DMD.
In summary it can be seen, when the projector of not charged pool normally works, the first capacitor C1 is in charged state; When the unexpected power-off of the projector of not charged pool; because the input of the second electric pressure converter 12 is connected with the input of tertiary voltage transducer 13; and be all connected with the positive plate of the first capacitor C1; therefore; the electricity that first capacitor C1 stores continues power supply a period of time can to the second electric pressure converter 12 and tertiary voltage transducer 13 simultaneously; thus the lower electricity time of delay control four voltage U 4 and the 5th voltage U 5; meet the timing requirements of digital micro-mirror chip to electricity under different power voltage, protect digital micro-mirror chip and be not damaged.
Wherein, the electricity that diode D1 can prevent the first capacitor C1 from storing is discharged by other loops.
First electric pressure converter 11, second electric pressure converter 12 and tertiary voltage transducer 13 can be all dc-dc.
The voltage of power Vcc can be 5V, and the voltage of the first voltage U 1 can be 8.5V, and the voltage of the second voltage U 2 can be the voltage of 16V, tertiary voltage U3 can be-10V, and the voltage of the 4th voltage U 4 can be 2.5V, and the voltage of the 5th voltage U 5 can be 1.9V.
On basis embodiment illustrated in fig. 3, see Fig. 4, the invention discloses the schematic diagram of another kind of digital micro-mirror chip, with embodiment illustrated in fig. 3 unlike, the embodiment shown in Fig. 4 also comprises: the second capacitor C2;
The positive plate of the second capacitor C2 connects the negative electrode of diode D1, and negative plate connects earth terminal.
Preferably, the capacitance of the first capacitor C1 can be identical with the capacitance of the second capacitor C2, can be all 100uF.
Wherein, increase the reason of the second capacitor C2 and the choosing principles of capacitor, describe see being correlated with in the power supply circuits of digital micro-mirror chip, repeat no more herein.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (6)
1. power supply circuits for digital micro-mirror chip, is characterized in that, comprising: the first electric pressure converter, the second electric pressure converter, tertiary voltage transducer, diode and the first capacitor; Described first electric pressure converter, described second electric pressure converter and described tertiary voltage transducer are dc-dc;
The input of described first electric pressure converter connects power supply, first output exports the first voltage that described first electric pressure converter conversion electric power voltage obtains, second output exports the second voltage that described first electric pressure converter changes the acquisition of described supply voltage, and the 3rd output exports the tertiary voltage that described first electric pressure converter changes the acquisition of described supply voltage;
The input of described second electric pressure converter connects the negative electrode of described diode, and the anode of described diode connects described power supply, and the output of described second electric pressure converter exports the 4th voltage that described second electric pressure converter changes the acquisition of described supply voltage;
The input of described tertiary voltage transducer connects the input of described second electric pressure converter, and output exports the 5th voltage that described tertiary voltage transducer changes the acquisition of described supply voltage;
The positive plate of described first capacitor connects the negative electrode of described diode, and negative plate connects earth terminal.
2. power supply circuits according to claim 1, is characterized in that, also comprise: the second capacitor;
The positive plate of described second capacitor connects the negative electrode of described diode, and negative plate connects earth terminal.
3. power supply circuits according to claim 2, is characterized in that, the capacitance of described first capacitor is identical with the capacitance of described second capacitor.
4. a digital micro-mirror chip, is characterized in that, comprising: the power supply circuits of digital micro-mirror chip, and digital micro-mirror chip body;
The power supply circuits of described digital micro-mirror chip comprise: the first electric pressure converter, the second electric pressure converter, tertiary voltage transducer, diode and the first capacitor; Described first electric pressure converter, described second electric pressure converter and described tertiary voltage transducer are dc-dc;
The input of described first electric pressure converter connects power supply, first output exports the first voltage that described first electric pressure converter conversion electric power voltage obtains, second output exports the second voltage that described first electric pressure converter changes the acquisition of described supply voltage, and the 3rd output exports the tertiary voltage that described first electric pressure converter changes the acquisition of described supply voltage;
The input of described second electric pressure converter connects the negative electrode of described diode, and the anode of described diode connects described power supply, and the output of described second electric pressure converter exports the 4th voltage that described second electric pressure converter changes the acquisition of described supply voltage;
The input of described tertiary voltage transducer connects the input of described second electric pressure converter, and output exports the 5th voltage that described tertiary voltage transducer changes the acquisition of described supply voltage;
The positive plate of described first capacitor connects the negative electrode of described diode, and negative plate connects earth terminal;
First feeder ear of described digital micro-mirror chip body is connected with described first output of described first electric pressure converter; Second feeder ear is connected with described second output of described first electric pressure converter; 3rd feeder ear is connected with described 3rd output of described first electric pressure converter; 4th feeder ear is connected with the described output of described second electric pressure converter; 5th feeder ear is connected with the described output of described tertiary voltage transducer.
5. digital micro-mirror chip according to claim 4, is characterized in that, also comprise: the second capacitor;
The positive plate of described second capacitor connects the negative electrode of described diode, and negative plate connects earth terminal.
6. digital micro-mirror chip according to claim 5, is characterized in that, the capacitance of described first capacitor is identical with the capacitance of described second capacitor.
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| CN201310452527.3A CN103475083B (en) | 2013-09-27 | 2013-09-27 | A kind of power supply circuits of digital micro-mirror chip and digital micro-mirror chip |
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| CN201310452527.3A CN103475083B (en) | 2013-09-27 | 2013-09-27 | A kind of power supply circuits of digital micro-mirror chip and digital micro-mirror chip |
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| CN103475083B true CN103475083B (en) | 2015-08-26 |
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| CN111158152A (en) * | 2020-02-17 | 2020-05-15 | Oppo广东移动通信有限公司 | Head-mounted display device and DLP projection system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101120502A (en) * | 2005-01-19 | 2008-02-06 | 皇家飞利浦电子股份有限公司 | A power supply system |
| CN102217427A (en) * | 2008-09-05 | 2011-10-12 | 路创电子公司 | Electronic ballast having a partially self-oscillating inverter circuit |
| CN202085346U (en) * | 2011-04-02 | 2011-12-21 | 英飞特电子（杭州）有限公司 | Auxiliary power circuit of two-line light modulator |
| CN203522310U (en) * | 2013-09-27 | 2014-04-02 | 惠州市华阳多媒体电子有限公司 | Power supply circuit of digital micromirror chip and digital micromirror chip |
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- 2013-09-27 CN CN201310452527.3A patent/CN103475083B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101120502A (en) * | 2005-01-19 | 2008-02-06 | 皇家飞利浦电子股份有限公司 | A power supply system |
| CN102217427A (en) * | 2008-09-05 | 2011-10-12 | 路创电子公司 | Electronic ballast having a partially self-oscillating inverter circuit |
| CN202085346U (en) * | 2011-04-02 | 2011-12-21 | 英飞特电子（杭州）有限公司 | Auxiliary power circuit of two-line light modulator |
| CN203522310U (en) * | 2013-09-27 | 2014-04-02 | 惠州市华阳多媒体电子有限公司 | Power supply circuit of digital micromirror chip and digital micromirror chip |
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