CN102255288B - Pair of 3D (3-dimensional) glasses and charging protector thereof - Google Patents
Pair of 3D (3-dimensional) glasses and charging protector thereof Download PDFInfo
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- CN102255288B CN102255288B CN201110176916.9A CN201110176916A CN102255288B CN 102255288 B CN102255288 B CN 102255288B CN 201110176916 A CN201110176916 A CN 201110176916A CN 102255288 B CN102255288 B CN 102255288B
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- triode
- charging
- charging circuit
- electronic switch
- mcu
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- 239000011521 glass Substances 0.000 title claims abstract description 42
- 230000001012 protector Effects 0.000 title abstract 2
- 238000001514 detection method Methods 0.000 claims abstract description 8
- 239000004065 semiconductor Substances 0.000 claims description 28
- 238000004880 explosion Methods 0.000 abstract 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 9
- 229910052744 lithium Inorganic materials 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to a pair of 3D (3-dimensional) glasses and a charging protector thereof. The charging device comprises a MCU (micro control unit), a charging circuit, a control circuit and an electronic switch which is connected between the MCU and the charging circuit and used for switching on and off an input power supply of the MCU; an input end of the control circuit is connected with a power input end of the charging circuit, and an output end of the control circuit is connected with the electronic switch; the control circuit is used for detecting charging voltage signals of the charging circuit and switching on and off the electronic switch in accordance with the charging voltage signals. In the charging device, the control circuit is used for detecting whether the charging circuit has the charging voltage signals so as to switch on and off the electronic switch, thus the electronic switch controls the switch-on/off of the input power supply of the MCU; when a battery is charged, the electronic switch is controlled to be switched off to break the load of the MCU, thus the battery is charged normally, thereby avoiding error judgment of charging detection and preventing fire hazard or explosion hazard caused by charging the pair of 3D glasses in use as well as improving the use safety of the pair of 3D glasses.
Description
Technical field
The present invention relates to 3D (three-dimensional, 3-D graphic) optometric technology field, relate in particular to 3D glasses charge protection device and 3D glasses on a kind of 3D of being applied in display.
Background technology
Along with developing rapidly and the raising of people's consumption demand of the image display technologies such as TV, the image display technologies such as TV progressively develop to 3D from 2D (two dimension).
At present, in order to watch 3D rendering, having a kind of comparatively ripe mode is to be the display configuration liquid crystal electron light valve spectacles such as 3D TV, this liquid crystal electron light valve spectacles is provided with a synchronized transmissions and receiving system, TV shows the image of left eye and right eye according to certain rule, the receiving system of glasses receives corresponding synchronizing signal, controls respectively the liquid crystal light valve of right and left eyes, make right and left eyes see respectively corresponding image, finally the image of compound stereoscopic in people's brain.
Above-mentioned liquid crystal electron light valve spectacles needs outside to provide power supply for it, at present, conventionally takes the supply power mode of button cell.But the power-on time of button cell is short, but also need the frequent battery of changing, not only cost is high, and is unfavorable for environmental protection.
In prior art, also there is employing lithium battery, by USB (Universal Serial BUS, USB) interface is connected with external power source, lithium battery is charged, although solved the problem of frequent replacing battery, but, due to (the Micro Control Unit of the MCU in lithium battery and glasses, micro-control unit, claim again single-chip microcomputer) parallel connection, and MCU needs power consumption as load, the electric current of its generation is when lithium cell charging, can make charging circuit that erroneous judgement occurs disconnected, cannot complete the detection that charging finishes; In addition, after lithium battery discharge prevention action, charging circuit provides power supply for MCU, and now the output voltage of charging circuit can be pulled down to 1.28V, makes MCU cisco unity malfunction, and the charging process of lithium battery also cannot be carried out; In addition, existing 3D glasses are not taked effective safeguard measure to the charging circuit of lithium battery, and 3D glasses in use charge, and have the danger that lithium battery is on fire or explode.
Summary of the invention
Main purpose of the present invention is to provide a kind of 3D glasses charge protection device and 3D glasses, is intended to improve the fail safe and work validity of 3D glasses charging circuit.
In order to achieve the above object, the present invention proposes a kind of 3D glasses charge protection device, comprises MCU, charging circuit, electronic switch and control circuit, wherein:
Described electronic switch is connected between the power output end of described MCU and charging circuit, for controlling conducting and the shutoff of the input power of MCU;
The input of described control circuit is connected with the power input of described charging circuit, the output of this control circuit is connected with described electronic switch, for detection of the charging voltage signal of charging circuit, according to the open and close of described charging voltage signal controlling electronic switch.
Preferably, described electronic switch is metal-oxide-semiconductor; Described control circuit comprises the first triode and the second triode, and the base stage of the first triode is connected with the power input of charging circuit, grounded emitter, and collector electrode is connected with the base stage of the second triode; The collector electrode of described the second triode and emitter are connected with grid and the source electrode of metal-oxide-semiconductor respectively, the collector electrode of the second triode is ground connection simultaneously, when charging circuit charges, and the collector electrode of the second triode and emitter conducting, by the source electrode of described metal-oxide-semiconductor and gate short, turn-off metal-oxide-semiconductor; When charging circuit discharges, the collector electrode of the second triode and not conducting of emitter, metal-oxide-semiconductor conducting, for MCU provides power supply.
Preferably, between described the first triode and the power input of described charging circuit, be in series with the first resistance.
Preferably, the collector electrode of described the second triode is by the second grounding through resistance.
Preferably, between the collector electrode of described the first triode and the base stage of the second triode, be in series with the 3rd resistance.
Preferably, described metal-oxide-semiconductor is P type metal-oxide-semiconductor.
Preferably, described the first triode is NPN type triode; Described the second triode is positive-negative-positive triode.
Preferably, described charging circuit is MP2603 integrated circuit.
The present invention also proposes a kind of 3D glasses, comprises charge protection device, and this charge protection device comprises MCU, charging circuit, electronic switch and control circuit, wherein:
Described electronic switch is connected between the power output end of described MCU and charging circuit, for controlling conducting and the shutoff of the input power of MCU;
The input of described control circuit is connected with the power input of described charging circuit, the output of this control circuit is connected with described electronic switch, for detection of the charging voltage signal of charging circuit, according to the open and close of described charging voltage signal controlling electronic switch.
Preferably, described charge protection device is 3D glasses charge protection device as above.
A kind of 3D glasses charge protection device and 3D glasses that the present invention proposes, by control circuit, detect charging circuit and whether have charging voltage signal, control the open and close of electronic switch, and then by electronic switch, control conducting and the shutoff of the input power of MCU, when battery charges, control circuit cuts out electronic switch, thereby disconnect the MCU load of 3D glasses, battery is charged normal, avoid charging to detect erroneous judgement disconnected, improved the work validity of battery charger, while having avoided 3D glasses normally to use there is danger on fire or blast in charging simultaneously, improved the safety in utilization of 3D glasses.
Accompanying drawing explanation
Fig. 1 is the electrical block diagram of 3D glasses charge protection device of the present invention one embodiment.
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.
Embodiment
Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Solution for embodiment of the invention is mainly: whether by control circuit, detect charging circuit has charging voltage signal, control the open and close of electronic switch, and then by electronic switch, control conducting and the shutoff of the input power of MCU, when battery charges, control circuit cuts out electronic switch, disconnect the MCU load of 3D glasses, battery is charged normal, avoid charging to detect erroneous judgement disconnected, while avoiding 3D glasses normally to use there is danger on fire or blast in charging simultaneously, to improve the safety in utilization of 3D glasses.
As shown in Figure 1, Fig. 1 is the electrical block diagram of 3D glasses charge protection device of the present invention one embodiment, and one embodiment of the invention proposes a kind of 3D glasses charge protection device, comprises MCU, charging circuit, electronic switch and control circuit, wherein:
Charging circuit is the charging circuit of the rechargeable batteries such as lithium battery, and it is connected with external power source by USB interface;
Electronic switch is connected between the power output end of MCU and charging circuit, for controlling conducting and the shutoff of the input power of MCU;
The input of control circuit is connected with the power input of charging circuit, and the output of this control circuit is connected with electronic switch, for detection of the charging voltage signal of charging circuit, according to the open and close of charging voltage signal controlling electronic switch.When control circuit detects charging circuit and has charging voltage signal, control electronic switch and close, when control circuit detects charging circuit and there is no charging voltage signal, control electronic switch and open.
Particularly, in the present embodiment, electronic switch is P type metal-oxide-semiconductor (MOSFET, Metal OxideSemiconductor Field Effect Transistor, MOS type field effect transistor) Q1, charging circuit is MP2603 integrated circuit, by USB interface, is connected with external power source; Control circuit comprises the first triode Q2 and the second triode Q3, and the first triode Q2 is NPN type triode; The second triode Q3 is positive-negative-positive triode.The first base stage B of triode Q2 and the power input of charging circuit are connected, the emitter E ground connection of the first triode Q2, and the collector electrode C of the first triode Q2 is connected with the base stage B of the second triode Q3; The collector electrode C of the second triode Q3 and emitter E are connected with grid G and the source S of metal-oxide-semiconductor Q1 respectively, the collector electrode C of the second triode Q3 is ground connection simultaneously, when charging circuit charges, the collector electrode C of the second triode Q3 and emitter E conducting, by the source S of metal-oxide-semiconductor Q1 and grid G short circuit, turn-off metal-oxide-semiconductor Q1; When charging circuit discharges, the collector electrode C of the second triode Q3 and not conducting of emitter E, metal-oxide-semiconductor Q1 conducting, for MCU provides power supply.
Due to when charging, the second triode Q3, by the source S of metal-oxide-semiconductor Q1 and grid G short circuit, has ended the work of MCU, has avoided when charging MCU also normally to work and has caused the erroneous judgement that charging circuit detects to be broken, and has improved the work validity of battery charger; Simultaneously, when battery charge, guarantee that 3D glasses are in off position, while avoiding in prior art that 3D glasses normally use there is danger on fire or that explode in charging, improved the safety in utilization of 3D glasses.
Further, in the present embodiment, between the first triode Q2 and the power input of charging circuit, be in series with the first resistance R 1 for dividing potential drop.The Q3 collector electrode C of the second triode is by the second resistance R 2 ground connection.Between the collector electrode C of the first triode Q2 and the base stage B of the second triode Q3, be in series with the 3rd resistance R 3 of dividing potential drop.
The operation principle of the present embodiment charge protection device is:
Whether the first triode Q2 detects charging circuit MP2603 in real time charge power supply, when battery charges, the first triode Q2 has detected charging voltage and conducting, the second triode Q3 conducting because of the conducting of the first triode Q2, after the second triode Q3 conducting, the collector electrode C of the second triode Q3 and emitter E are by the source S of metal-oxide-semiconductor Q1 and grid G short circuit, thereby ended the work of MCU, avoided disconnected in also normally the work erroneous judgement that causes charging circuit to detect of MCU of when charging, simultaneously when battery charges, guarantee that 3D glasses are in off position, avoid in prior art charging when 3D glasses normally use to have danger on fire or blast, improved the safety in utilization of 3D glasses.
When battery does not charge, the first triode Q2 and second all not conductings of triode Q3, metal-oxide-semiconductor Q1 passes through the second resistance R 2 conductings of biasing, the charging circuit YuMCU UNICOM of battery, for MCU provides power supply, now, glasses can normally work.
And the metal-oxide-semiconductor adopting in the present embodiment, when not working, MCU can not bring extra power consumption yet.
The present invention also proposes a kind of 3D glasses, comprises charge protection device, and this charge protection device comprises MCU, charging circuit, electronic switch and control circuit, wherein:
Electronic switch is connected between the power output end of MCU and charging circuit, for controlling conducting and the shutoff of the input power of MCU;
The input of control circuit is connected with the power input of charging circuit, and the output of this control circuit is connected with electronic switch, for detection of the charging voltage signal of charging circuit, according to the open and close of charging voltage signal controlling electronic switch.
Charge protection device in the present embodiment can, for the 3D glasses charge protection device described in above-described embodiment, not be described further at this.
The foregoing is only the preferred embodiments of the present invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or flow process conversion that utilizes specification of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present invention.
Claims (9)
1. a 3D glasses charge protection device, comprises MCU and charging circuit, it is characterized in that, also comprises electronic switch and control circuit, wherein:
Described electronic switch is connected between the power output end of described MCU and charging circuit, for controlling conducting and the shutoff of the input power of MCU;
The input of described control circuit is connected with the power input of described charging circuit, the output of this control circuit is connected with described electronic switch, for detection of the charging voltage signal of charging circuit, according to the open and close of described charging voltage signal controlling electronic switch; Described electronic switch is metal-oxide-semiconductor; Described control circuit comprises the first triode and the second triode, and the base stage of the first triode is connected with the power input of charging circuit, grounded emitter, and collector electrode is connected with the base stage of the second triode; The collector electrode of described the second triode and emitter are connected with grid and the source electrode of metal-oxide-semiconductor respectively, the collector electrode of the second triode is ground connection simultaneously, when charging circuit charges, and the collector electrode of the second triode and emitter conducting, by the source electrode of described metal-oxide-semiconductor and gate short, turn-off metal-oxide-semiconductor; When charging circuit discharges, the collector electrode of the second triode and not conducting of emitter, metal-oxide-semiconductor conducting, for MCU provides power supply.
2. device according to claim 1, is characterized in that, between described the first triode and the power input of described charging circuit, is in series with the first resistance.
3. device according to claim 1, is characterized in that, the collector electrode of described the second triode is by the second grounding through resistance.
4. device according to claim 1, is characterized in that, between the collector electrode of described the first triode and the base stage of the second triode, is in series with the 3rd resistance.
5. according to the device described in any one in claim 1-4, it is characterized in that, described metal-oxide-semiconductor is P type metal-oxide-semiconductor.
6. device according to claim 5, is characterized in that, described the first triode is NPN type triode; Described the second triode is positive-negative-positive triode.
7. device according to claim 6, is characterized in that, described charging circuit is MP2603 integrated circuit.
8. 3D glasses, is characterized in that, comprise charge protection device, and this charge protection device comprises MCU, charging circuit, electronic switch and control circuit, wherein:
Described electronic switch is connected between the power output end of described MCU and charging circuit, for controlling conducting and the shutoff of the input power of MCU;
The input of described control circuit is connected with the power input of described charging circuit, the output of this control circuit is connected with described electronic switch, for detection of the charging voltage signal of charging circuit, according to the open and close of described charging voltage signal controlling electronic switch; Described electronic switch is metal-oxide-semiconductor; Described control circuit comprises the first triode and the second triode, and the base stage of the first triode is connected with the power input of charging circuit, grounded emitter, and collector electrode is connected with the base stage of the second triode; The collector electrode of described the second triode and emitter are connected with grid and the source electrode of metal-oxide-semiconductor respectively, the collector electrode of the second triode is ground connection simultaneously, when charging circuit charges, and the collector electrode of the second triode and emitter conducting, by the source electrode of described metal-oxide-semiconductor and gate short, turn-off metal-oxide-semiconductor; When charging circuit discharges, the collector electrode of the second triode and not conducting of emitter, metal-oxide-semiconductor conducting, for MCU provides power supply.
9. 3D glasses according to claim 8, is characterized in that, described charge protection device is the 3D glasses charge protection device described in any one in claim 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110176916.9A CN102255288B (en) | 2011-06-28 | 2011-06-28 | Pair of 3D (3-dimensional) glasses and charging protector thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110176916.9A CN102255288B (en) | 2011-06-28 | 2011-06-28 | Pair of 3D (3-dimensional) glasses and charging protector thereof |
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| CN102255288A CN102255288A (en) | 2011-11-23 |
| CN102255288B true CN102255288B (en) | 2014-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110176916.9A Expired - Fee Related CN102255288B (en) | 2011-06-28 | 2011-06-28 | Pair of 3D (3-dimensional) glasses and charging protector thereof |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105305522A (en) * | 2014-07-31 | 2016-02-03 | 浙江亿思达显示科技有限公司 | Charging-type 3D glasses capable of performing automatic charging |
| CN106451341B (en) * | 2016-11-22 | 2019-07-19 | 亿嘉和科技股份有限公司 | Load over-current protection circuit and load overcurrent guard method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1881734A (en) * | 2005-06-13 | 2006-12-20 | 华为技术有限公司 | Terminal circuit and its charge controlling method |
| CN201813422U (en) * | 2010-09-09 | 2011-04-27 | Tcl集团股份有限公司 | Charging chip and mobile terminal capable of automatically adjusting charging mode |
| CN102073141A (en) * | 2010-11-30 | 2011-05-25 | 康佳集团股份有限公司 | 3D glasses capable of being charged automatically |
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2011
- 2011-06-28 CN CN201110176916.9A patent/CN102255288B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1881734A (en) * | 2005-06-13 | 2006-12-20 | 华为技术有限公司 | Terminal circuit and its charge controlling method |
| CN201813422U (en) * | 2010-09-09 | 2011-04-27 | Tcl集团股份有限公司 | Charging chip and mobile terminal capable of automatically adjusting charging mode |
| CN102073141A (en) * | 2010-11-30 | 2011-05-25 | 康佳集团股份有限公司 | 3D glasses capable of being charged automatically |
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| CN102255288A (en) | 2011-11-23 |
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Granted publication date: 20141126 |