CN203552121U - Miniature projector computer integrated machine - Google Patents
Miniature projector computer integrated machine Download PDFInfo
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- CN203552121U CN203552121U CN201320455635.1U CN201320455635U CN203552121U CN 203552121 U CN203552121 U CN 203552121U CN 201320455635 U CN201320455635 U CN 201320455635U CN 203552121 U CN203552121 U CN 203552121U
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Abstract
A miniature projector computer integrated machine comprises a detachable miniature projector computer and a cabinet, wherein the detachable miniature projector computer is arranged on the upper surface of the integrated machine, and the cabinet is arranged on the lower surface of the integrated machine. The miniature projector computer is connected with the top of the cabinet through a universal cradle head, the bottom of the universal cradle head is fixed to the upper portion of the cabinet, a clamp slot in the bottom of the miniature projector computer and a clamp slot in the top of the universal cradle head are clamped together, and a power interface, a data input-output interface and an audio output interface are arranged in the clamp slots. The miniature projector computer integrated machine is characterized in that an X86 framework windows operating system is adopted. As the projector computer is provided with a large screen and is portable, the miniature projector computer integrated machine has a huge application space in the aspects of home entertainment, outdoor entertainment, commercial office and the like.
Description
Technical field:
The utility model relates to a kind of all-in-one machine of miniature projection computer, it is a kind of emerging removable cabinet type computer product of take the integrated audio technology that micro projection technology is display mode, what adopt is X86-based windows operating system, especially has unique distinction in display mode and use-pattern.Belong to projection computer technical field.
Background technology:
From computer type, divide at present, desktop computer, notebook computer, panel computer are all to using the display medium of liquid crystal display or LED screen as above several computers.By retrieving at State Intellectual Property Office's net, current projection computer technology, first, all do not adopt X86 platform windows operating system, just adopt video conversion module; The second, projection computer is different from the computer of other types, and heat radiation directly affects the performance of projection computer, and current projection computer is not expressed innovative characteristics in heat dissipation design; Three, projection computer is to be projected as main display mode, and current projection computer is not expressed innovative characteristics at colour consistency and auto color white balance correction; Four, current projection computer does not have bluetooth module, 3G module, 3D module, and such projection computer can not connect bluetooth equipment (as Baffle Box of Bluetooth), can there is no 3D function with the online of 3G card, can not see 3D video; The 5th, what current projection computer adopted is telepilot input mode; Six, current projection computer does not have the projection computer that collects linux system that the utility model relates to, sound system, X86 platform windows8 operating system rack is in simultaneously, and the dismountable all-in-one pattern of projection computer.
Utility model content:
The utility model is a kind of projection computer all-in-one that micro projection technology is display mode of take.The key distinction of the utility model and projector is that the projection part that the utility model adopts is RGB sequential LED light source and DMD micro projection Driving technique, and central processing unit adopts X86-based on integrated machine system mainboard, system adopts Android windows8 operating system.In addition, the exclusive all-in-one pattern of the utility model is comprised of two parts:
First is the dismountable micro projection computer above all-in-one
This micro projection computer is that direct supply input interface, electrical source exchange module, external battery interface, DMD control module, DMD driver module, the optical lens that is provided with circuit, LED driver module, LED light source, wireless touchpad and cooling system form by central processing unit (linux system), memory modules, flash memory module, 2 USB interface, 2 HDMI input interfaces, 3D module, wireless touchpad control module, audio output interface, AV input interface, TF card interface, loudspeaker, position annexation between them is: central processing unit by control circuit board respectively with memory modules, flash memory module, 2 USB interface, 2 HDMI input interfaces, 3D module, wireless touchpad control module, 1 RJ45 network interface, audio output interface, AV input interface, TF card interface, loudspeaker connects, loudspeaker connects direct supply input interface and is connected with data switching module, all-in-one enclosure top data-interface is connected with data switching module, in all-in-one rack, battery or power supply are by powering to projection computer with data-interface, the circuit connecting mode of optical projection system is that DMD control module is connected with the optical lens that is provided with circuit with DMD driver module respectively, LED driver module in DMD driver module is connected with LED light source, LED light source produces image by optical lens, DMD control module is connected with central processing unit, by central processing unit, be connected with cooling system, by wireless touchpad, operate.The projection computer of this part detachably gets off and uses separately.
Second portion is the rack part below all-in-one
See Figure 16, the micro projection computer 1 of first is connected with rack 3 tops by universal turning bench 2.Universal turning bench 2 bottoms are fixed on rack 3 tops.Micro projection computer 1 bottom draw-in groove and universal turning bench 2 top draw-in grooves are stuck, and draw-in groove inner joint has power interface, data input/output interface, audio output interface.
Rack mainboard is fixed on side of cabinet, mainboard (chipset: Intel H61; Video card type: display card; Sound card: independent sound card; Network interface card: (the CPU model: Duo two generations i3 processor i3-2120 of the central processor CPU 802.11BGN wireless LAN card); Speed: 3.3GHz; Core number: double-core; L2 cache: 512KB; Three grades of buffer memorys: 3MB) connect portable hard drive groove, the portable hard drive of different capabilities can be inserted in this portable hard drive groove, the portable hard drive of machine configuration standard configuration (500G, SATA serial, 7200 revs/min).Central processing unit connects internal memory (capacity: 2GB by motherboard circuit; Speed: DDR3; Slot quantity: 2; Maximum support capacity: 8GB).Central processing unit connects blue-ray DVD driver by motherboard circuit.Central processing unit connects video card (display chip AMD6470 by motherboard circuit; Video memory capacity: independent 1GB; Video memory specification: DDR3).Central processing unit connects 4 of USB interface, 1 of card reader module (16 close 1 card reader), 1, PS/2 interface, 1, RJ45 interface, 802.11BGN wireless LAN card, bluetooth 4.0 modules by motherboard circuit.Central processing unit connects sound card by motherboard circuit.Sound card audio output interface and amplifier audio frequency input interface.Two Hi-Fi sound-boxes of rack both sides are connected with the audio output interface of power amplifier by data line.Central processing unit connects rack power supply by motherboard circuit, and rack power supply is connected with power supervisor, and one power lead of power supervisor is connected with the power interface of The Cloud Terrace draw-in groove.Second strand of power lead of power supervisor is connected with power amplifier power interface.The 3rd strand of power lead is connected with rack power supply.
Rack below is a placement high-capacity lithium battery groove 10, and the output terminal of lithium battery links with battery case input end interface, then links by power lead and power supervisor power input interface.The input end of lithium battery links with the output terminal interface of battery case, and this lithium battery is selectable unit, and detachable, user can not fill, and can fill the battery of different capabilities yet.Battery case 10 power wire coil is out at the terminal block of an automatically retractable, 5 meters of power supply line lengths, and external power supply can be given lithium cell charging, if do not fill lithium battery, can directly to all-in-one, power.
Under the right side of rack 3, side is provided with supply hub 11, and bottom is provided with 4 wheels that can turn to 4, facilitates user's sliding integrated machine.
First: micro projection computer
Described central processing unit is that dominant frequency is the arm processor of 1G,
The model specification of described memory modules is 1GB DDR3;
The model specification of described flash memory module is 4GB Nand Flash, up to16GB support;
The model specification of described 2 USB interface is 2.0;
The model specification of described 2 HDMI input interfaces is HDMI1.3a DVI;
The model specification of described 3D module is active shutter 3D;
The model specification of described wireless touchpad control module is 2.4GHz;
The model specification of described direct supply input interface is 19V, 3.42A;
The model specification of described audio output interface is 3.5mm standard;
The model specification of described AV input interface is 3.5mm standard;
The model specification of described TF card interface is Up to32GB;
Described loudspeaker is comprised of Realtek specialty decoding chip+composite diaphragm loudspeaker 3Wx2, and the two interconnects;
The model specification of described electrical source exchange module is AC100-240V, Standby:<0.5W;
The model specification of described external battery interface is 19V, 3.42A standard;
Described DMD control module is 0.45 " DLP;
DMD control module feature:
One, colour consistency system:
Because of the material behavior of LED, the luminance of every LEDs there are differences.While how to guarantee to produce in enormous quantities, every video machine consistance in color is very important link.Our a set of software and hardware system brief introduction of exploitation is as follows:
First according to characteristic, system power dissipation, the product Show Color of the RGB LED body using on ray machine, require to determine preliminary Duty cycle, show colour gamut, brightness etc.In conjunction with the LED driveability parameter adopting, all these data are inputed in the data model of building up in advance, computing obtains preliminary LED sequence simultaneously.After returning, uses PCBA the LED sequence obtaining, some electronic bright bare engine, and the while is measured the light coordinate brightness value of actual displayed under the state that shows RGB tri-pure colors and white with chroma meter.Again according to the needed parameter differences of actual measured value and expection, thereby the corresponding parameter of built data model is adjusted, with the data model after adjusting, export new LED sequence again and drive ray machine with chroma meter, to measure simultaneously, the parameters such as the actual light coordinate brightness value obtaining like this can reach desired requirement gradually.
There is LED and various parts parameter characteristic deviation to some extent within the specific limits for when batch production, the data model of in data model, deviate input being built, so just can obtain a lot of LED sequences, thus in theory when volume production arbitrary machine always can in the LED sequences database obtaining, find suitable one group when reality is exported, to reach same display effect.
In formal production, every machine can be done a calibration actions: with chroma meter, measure the light coordinate brightness value under RGB tri-pure colors and white states, by a set of tool and tool software, adjusted LED electric current and selected suitable LED sequence; Finally finally definite parameter is cured in the storer of every machine intimate, can automatically records the corresponding measured value of luminance brightness sensor under each state simultaneously, during in order to follow-up automatic calibration, use.
Note:
Two: auto color/white balance correction:
After long-time use, each parts of projection computer (LED, main board elements etc.) can produce certain performance change, cause final display effect and the initial difference that produces; Thereby there is the skew of colour cast and the white balance point of color.
We are provided with luminance brightness sensor in system, each LED luminance brightness of RGB of meeting real-time monitoring system, and contrast with initial value, as departing from certain value, difference can revise to reach the constant function of long-time use color.Working method is as follows:
Each start time luminance sensor light sensor can monitor the luminance brightness of each LED of RGA, and the raw data when dispatching from the factory compares, and draws the brightness number difference that the decay of LED lamp produces; Then by the software of special exploitation, automatically select the data sequence matching with current LED characteristic.In system, also implanted LED monochrome information when software can record each shutdown automatically, and set up table list, data and Benchmark brightness value that when start shooting next time, system was transferred while shutting down last time are compared, if needed, system by the power supply of automatically adjusting each LED lamp of RGA to guarantee the consistent of white balance point.
The model specification of described DMD driver module is 0.45 " DLP;
Described optical lens model specification is high antireflection coating camera lens;
Described cooling system.Adopt and by heat pipe (copper conductor tube-inside is the cool solidifying water of vacuum), heat is transferred to fin from focus, then configure small blast fan from bottom drawing, heat is blown out through louvre and is discharged in air from fin.Constantly radiating effect is good, and product size can be reduced a lot.
Described wireless touchpad model specification is Wireless Trackpad100, is this projection computer standard fitting; Use wireless touchpad to operate projection computer by remote-wireless, wireless touchpad is supported two finger scrollings, three finger page turnings and four finger application program handoff functionalities, and on touch pad, be furnished with 5 function keys, can realize the functions such as switching on and shutting down, adjusting sound, upper and lower front and back selection.Adopt this wireless touchpad, user can be convenient to use projection computer.
Described LED driver module and described LED light source are DMD driver module internal parts, and DMD driver module model specification is 0.45 " DLP;
Second portion: all-in-one rack
Rack mainboard is fixed side of cabinet, mainboard (chipset: Intel H61; Video card type: display card; Sound card: independent sound card; Network interface card: (the CPU model: Duo two generations i3 processor i3-2120 of the central processor CPU 802.11BGN wireless LAN card); Speed: 3.3GHz; Core number: double-core; L2 cache: 512KB; Three grades of buffer memorys: 3MB) connect portable hard drive groove, the portable hard drive of different capabilities can be inserted in this portable hard drive groove, the portable hard drive of machine configuration standard (500G, SATA serial, 7200 revs/min).Central processing unit connects internal memory (capacity: 2GB by motherboard circuit; Speed: DDR3; Slot quantity: 2; Maximum support capacity: 8GB).Central processing unit connects blue-ray DVD driver by motherboard circuit.Central processing unit connects video card (display chip AMD6470 by motherboard circuit; Video memory capacity: independent 1GB; Video memory specification: DDR3).Central processing unit connects 4 of USB interface, 2 HDMI interfaces, 1 of card reader module (16 close 1 card reader), 1, PS/2 interface, 1, RJ45 interface, 802.11BGN wireless LAN card, bluetooth 4.0 modules by motherboard circuit.Central processing unit connects sound card by motherboard circuit.Sound card audio output interface and amplifier audio frequency input interface.Two Hi-Fi sound-boxes of rack both sides are connected with the audio output interface of power amplifier by data line.Central processing unit connects by motherboard circuit
Described central processing unit is CPU(CPU model: Duo two generations i3 processor i3-2120; Speed: 3.3GHz; Core number: double-core; L2 cache: 512KB; Three grades of buffer memorys: 3MB),
The model specification of described memory modules is capacity: 2GB; Speed: DDR3; Slot quantity: 2; Maximum support capacity: 8GB;
The model specification of described 4 USB interface is 2.0;
The model specification of described 2 HDMI input interfaces is HDMI1.3a DVI;
The model specification of described 1 RJ45 network interface is 10/100Mbps;
The model specification of described bluetooth module is 4.0;
The model specification of described wireless LAN card is 802.11BGN;
The model specification of described TF card interface is Up to32GB;
The model specification of described portable hard drive is 500G, SATA serial, 7200 revs/min
The model specification of described video card is display chip: AMD6470; Video memory capacity: independent 1GB; Video memory specification: DDR3
Described rack power specification is 220v, 300W
The beneficial effects of the utility model:
A kind of projection computer all-in-one with windows8 operating system, projection size is at 40-120 cun, as can completing, any operation of notebook computer, desktop computer, with functions such as wifi, bluetooth, 3D, can get online without being tethered to a cable, use the 3D glasses of outfit can see 3D film; All-in-one top projection computer can disassemble independent use, conveniently goes out to carry.All-in-one is furnished with power amplifier, Hi-Fi sound-box is realized indoor movable home theater effect, and all-in-one can be equipped with high-capacity lithium battery, gives at ordinary times lithium cell charging, can accomplish Wireless in use; The operation of use wireless touchpad, facilitates easy-to-use.Due to the giant-screen of projection computer and portable unification, this kind of projection computer all-in-one is specially for home entertaining designs.
Accompanying drawing explanation
Fig. 1 is front view (FV) schematic diagram on the inner stacking figure of projection computer
Fig. 2 is the inner stacking figure side previous figures intention of projection computer
Fig. 3 is the inner stacking figure of projection computer rear flank face figure schematic diagram
Fig. 4 is the inner stacking figure side of projection computer left side figure schematic diagram
Fig. 5 is the inner stacking figure side of projection computer right side figure schematic diagram
Fig. 6 is the left back 45 degree skeleton view schematic diagram of the inner stacking figure of projection computer
Fig. 7 is the right front 45 degree skeleton view schematic diagram of the inner stacking figure of projection computer
Fig. 8 is the left front 45 degree skeleton view schematic diagram of the inner stacking figure of projection computer
Fig. 9 is the left back 45 degree skeleton view schematic diagram of the inner stacking figure of projection computer
Figure 10 is the right front schematic diagram of projection computer external form figure
Figure 11 is the left back schematic diagram of projection computer external form figure
Figure 12 is the right front 45 degree schematic diagram of wireless touchpad outside drawing
Figure 13 is wireless touchpad outside drawing right side schematic diagram
Figure 14 is (upper end is USB line) schematic diagram above wireless touchpad outside drawing
Figure 15 is projection computer all-in-one external form front view (FV)
Figure 16 is projection computer all-in-one external form back view
Figure 17 is projection computer all-in-one profile left side figure
Figure 18 is projection computer all-in-one profile right side figure
In figure, symbol description is as follows:
1, micro projection computer; 2, universal turning bench; 3, rack; 4, wheel; 5, portable hard drive groove; 6, blue-ray DVD driver; 7, power amplifier; 8, power supervisor; 9, audio amplifier; 10, battery case; 11, supply hub.
Embodiment
See shown in Fig. 1-18, the utility model is a kind of all-in-one machine of miniature projection computer,
First is the dismountable micro projection computer above all-in-one
Micro projection computer 1 is that direct supply input interface, electrical source exchange module, external battery interface, DMD control module, DMD driver module, the optical lens that is provided with circuit, LED driver module, LED light source, wireless touchpad and cooling system form by central processing unit (linux system), memory modules, flash memory module, 2 USB interface, 2 HDMI input interfaces, 3D module, wireless touchpad control module, audio output interface, AV input interface, TF card interface, loudspeaker, position annexation between them is: central processing unit by control circuit plate respectively with memory modules, flash memory module, 2 USB interface, 2 HDMI input interfaces, 3D module, wireless touchpad control module, 1 RJ45 network interface, audio output interface, AV input interface, TF card interface, loudspeaker connects, loudspeaker connects direct supply input interface and is connected with data switching module, all-in-one enclosure top data-interface is connected with data switching module, in all-in-one rack, battery or power supply are by powering to projection computer with data-interface, the circuit connecting mode of optical projection system is that DMD control module is connected with the optical lens that is provided with circuit with DMD driver module respectively, LED driver module in DMD driver module is connected with LED light source, LED light source produces image by optical lens, DMD control module is connected with central processing unit, by central processing unit, be connected with cooling system, by wireless touchpad, operate.The projection computer of this part detachably gets off and uses separately.
Second portion is the rack part below all-in-one
See Figure 16, the micro projection computer 1 of first is connected with rack 3 tops by universal turning bench 2.Universal turning bench 2 bottoms are fixed on rack 3 tops.Micro projection computer 1 bottom draw-in groove and universal turning bench 2 top draw-in grooves are stuck, and draw-in groove inner joint has power interface, data input/output interface, audio output interface.
Rack mainboard is fixed side of cabinet, mainboard (chipset: Intel H61; Video card type: display card; Sound card: independent sound card; Network interface card: (the CPU model: Duo two generations i3 processor i3-2120 of the central processor CPU 802.11BGN wireless LAN card); Speed: 3.3GHz; Core number: double-core; L2 cache: 512KB; Three grades of buffer memorys: 3MB) connect portable hard drive groove, the portable hard drive of different capabilities can be inserted in this portable hard drive groove, the portable hard drive of machine configuration standard configuration (500G, SATA serial, 7200 revs/min).Central processing unit connects internal memory (capacity: 2GB by motherboard circuit; Speed: DDR3; Slot quantity: 2; Maximum support capacity: 8GB).Central processing unit connects blue-ray DVD driver by motherboard circuit.Central processing unit connects video card (display chip AMD6470 by motherboard circuit; Video memory capacity: independent 1GB; Video memory specification: DDR3).Central processing unit connects 4 of USB interface, 1 of card reader module (16 close 1 card reader), 1, PS/2 interface, 1, RJ45 interface, 802.11BGN wireless LAN card, bluetooth 4.0 modules by motherboard circuit.Central processing unit connects sound card by motherboard circuit.Sound card audio output interface and amplifier audio frequency input interface.Two Hi-Fi sound-boxes of rack both sides are connected with the audio output interface of power amplifier by data line.Central processing unit connects rack power supply by motherboard circuit, and rack power supply is connected with power supervisor, and one power lead of power supervisor is connected with the power interface of The Cloud Terrace draw-in groove.Second strand of power lead of power supervisor is connected with power amplifier power interface.The 3rd strand of power lead is connected with rack power supply.
Rack below is a placement high-capacity lithium battery groove 10, and the output terminal of lithium battery links with battery case input end interface, then links by power lead and power supervisor power input interface.The input end of lithium battery links with the output terminal interface of battery case, and this lithium battery is selectable unit, and detachable, user can not fill, and can fill the battery of different capabilities yet.Battery case 10 power wire coil is out at the terminal block of an automatically retractable, 5 meters of power supply line lengths, and external power supply can be given lithium cell charging, if do not fill lithium battery, can directly to all-in-one, power.
Under the right side of rack 3, side is provided with supply hub 11, and bottom is provided with 4 wheels that can turn to 4, facilitates user's sliding integrated machine.
Product specification:
Claims (5)
1. an all-in-one machine of miniature projection computer, is comprised of the rack two parts below dismountable micro projection computer and all-in-one above all-in-one, and micro projection computer expert crosses universal turning bench and is connected with enclosure top, and universal turning bench bottom is fixed on rack top, micro projection computer bottom draw-in groove and universal turning bench top draw-in groove are stuck, and draw-in groove inner joint is provided with power interface, data input/output interface, audio output interface, it is characterized in that: what it adopted is X86-based windows operating system, this micro projection computer is that direct supply input interface, electrical source exchange module, external battery interface, DMD control module, DMD driver module, the optical lens that is provided with circuit, LED driver module, LED light source, wireless touchpad and cooling system form by linux system central processor, memory modules, flash memory module, 2 USB interface, 2 HDMI input interfaces, 3D module, wireless touchpad control module, audio output interface, AV input interface, TF card interface, loudspeaker, central processing unit by control circuit board respectively with memory modules, flash memory module, 2 USB interface, 2 HDMI input interfaces, 3D module, wireless touchpad control module, 1 RJ45 network interface, audio output interface, AV input interface, TF card interface, loudspeaker connects, loudspeaker connects direct supply input interface and is connected with data switching module, all-in-one enclosure top data-interface is connected with data switching module, in all-in-one rack, battery or power supply are by powering to projection computer with data-interface, the circuit connecting mode of optical projection system is that DMD control module is connected with the optical lens that is provided with circuit with DMD driver module respectively, LED driver module in DMD driver module is connected with LED light source, LED light source produces image by optical lens, DMD control module is connected with central processing unit, by central processing unit, be connected with cooling system, by wireless touchpad, operate, the mainboard of this rack is fixed on side of cabinet, central processor CPU on mainboard connects portable hard drive groove, the portable hard drive of machine configuration standard, central processing unit connects internal memory by motherboard circuit, central processing unit connects blue-ray DVD driver by motherboard circuit, central processing unit connects video card by motherboard circuit, and central processing unit connects 4 of USB interface, 1 of card reader module, 1, PS/2 interface, 1, RJ45 interface, 802.11BGN wireless LAN card, bluetooth 4.0 modules by motherboard circuit, central processing unit connects sound card, sound card audio output interface and amplifier audio frequency input interface by motherboard circuit, two Hi-Fi sound-boxes of rack both sides are connected with the audio output interface of power amplifier by data line, and central processing unit connects rack power supply by motherboard circuit, and rack power supply is connected with power supervisor.
2. a kind of all-in-one machine of miniature projection computer according to claim 1, is characterized in that: the chipset of this mainboard is: Intel H61; Video card type: display card; Sound card: independent sound card; Network interface card: 802.11BGN wireless LAN card.
3. a kind of all-in-one machine of miniature projection computer according to claim 1, is characterized in that: the model of this central processor CPU: Duo two generations i3 processor i3-2120; Speed: 3.3GHz; Core number: double-core; L2 cache: 512KB; Three grades of buffer memory: 3MB.
4. a kind of all-in-one machine of miniature projection computer according to claim 1, is characterized in that: the capacity of this internal memory: 2GB; Speed: DDR3; Slot quantity: 2; Maximum support capacity: 8GB.
5. a kind of all-in-one machine of miniature projection computer according to claim 1, is characterized in that: the model of this video card: AMD6470; Video memory capacity: independent 1GB; Video memory specification: DDR3.
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| CN201320455635.1U CN203552121U (en) | 2013-07-29 | 2013-07-29 | Miniature projector computer integrated machine |
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| CN201320455635.1U CN203552121U (en) | 2013-07-29 | 2013-07-29 | Miniature projector computer integrated machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104378567A (en) * | 2014-12-06 | 2015-02-25 | 深圳市康凯斯信息技术有限公司 | Portable DLP multimedia intelligent cloud projecting system |
| CN107861891A (en) * | 2017-11-14 | 2018-03-30 | 郑州天迈科技股份有限公司 | Audio/video data access method for public transport vehicle-mounted hard disk |
-
2013
- 2013-07-29 CN CN201320455635.1U patent/CN203552121U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104378567A (en) * | 2014-12-06 | 2015-02-25 | 深圳市康凯斯信息技术有限公司 | Portable DLP multimedia intelligent cloud projecting system |
| CN107861891A (en) * | 2017-11-14 | 2018-03-30 | 郑州天迈科技股份有限公司 | Audio/video data access method for public transport vehicle-mounted hard disk |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140416 Termination date: 20180729 |