CN102880241B - A kind of panel computer and its implementation with second display function - Google Patents
A kind of panel computer and its implementation with second display function Download PDFInfo
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- CN102880241B CN102880241B CN201210325411.9A CN201210325411A CN102880241B CN 102880241 B CN102880241 B CN 102880241B CN 201210325411 A CN201210325411 A CN 201210325411A CN 102880241 B CN102880241 B CN 102880241B
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Abstract
The present invention relates to a kind of panel computer with second display function, comprise CPU(1), USB communication module (2), exogenous signals processing module (3), display handover module (4) and display (5), wherein, USB communication module (2) realizes the communication between exogenous signals and exogenous signals processing module (3); Exogenous signals processing module (3) is for the treatment of exogenous signals, and the exogenous signals after process adopts display (5) display; Display handover module (4) is for the exogenous signals after hand-off process and CPU(1) display that self exports.Present invention also offers a kind of implementation method making panel computer have second display function.Enforcement the invention has the beneficial effects as follows, make panel computer achieve second display function as desktop computer or notebook computer, signal transmission antijamming capability is strong, and display is smooth.
Description
Technical field
The present invention relates to computer display technical field, more particularly, relate to a kind of panel computer and its implementation with second display function.
Background technology
Panel computer need not be renovated, do not have keyboard, using touch-screen as basic input equipment, be a kind of small-sized, be convenient for carrying and merit can completely PC.The outward appearance of panel computer is similar with notebook computer, but panel computer is not simple notebook computer, and it can be referred to as the concentrated version of notebook computer.The profile of panel computer is between the profile and the profile of palm PC of notebook computer, but the processing power of panel computer is better than palm PC.Relative to notebook computer, it is except having all functions, also supports handwriting input or phonetic entry, movability and portability even better.Current panel computer has two kinds of specifications usually, and one is special handwriting pad, can the peripheral hardware such as external connection keyboard and screen, can be used as general PC and uses; Another kind is notes type handwriting pad, can folding as notebook computer.The second display function that can not be used as desktop computer or notebook computer based on the panel computer of android system on the market now uses.
Summary of the invention
The technical problem to be solved in the present invention is, the panel computer based on Android operation system for prior art can not use as second display, provides a kind of panel computer and its implementation with second display function.
The technical solution adopted for the present invention to solve the technical problems is as follows:
The present invention constructs a kind of panel computer with second display function, comprise CPU, display, it is characterized in that, described panel computer also comprises the USB communication module be connected with external equipment and described CPU respectively, the exogenous signals processing module be connected with described USB communication module, the display handover module be connected with described CPU and described exogenous signals processing module respectively, described display is connected with described display handover module, wherein, described USB communication module realizes the communication between the exogenous signals of described external equipment input and described exogenous signals processing module, described exogenous signals processing module is for the treatment of described exogenous signals, the display that described display handover module self exports for the described exogenous signals after hand-off process and described CPU, described display is used for the described exogenous signals after Graphics Processing.
Have in the panel computer of second display function of the present invention, described USB communication module comprises USB HUB, USB switch and USB interface expansion line, and described USB HUB is connected with described CPU, to provide circumscribed USB interface; Described USB switch is connected with described USB HUB, realizes USB HOST function and vision signal input function.
Have in the panel computer of second display function of the present invention, described exogenous signals processing module comprises SDRAM and the chip based on Displaylink technology.
Have in the panel computer of second display function of the present invention, described display handover module comprises simulating signal switch chip.
Have in the panel computer of second display function of the present invention, described panel computer comprises the panel computer with Android operation system.
Another technical matters of the present invention solves like this, constructs a kind of implementation method using above-mentioned panel computer to make it have second display function, comprises the following steps:
(S1) exogenous signals of described external equipment input is transferred in described exogenous signals processing module by described USB communication module;
(S2) exogenous signals described in the process of described exogenous signals processing module, the described exogenous signals after process is transferred in described display handover module;
(S3) display that the described exogenous signals after process self exports through described display handover module and described CPU switches;
(S4) the described exogenous signals after described display Graphics Processing.
Have in the implementation method of second display function at the panel computer that makes of the present invention, in step (S2), adopt Displaylink technology to process described exogenous signals.
Have in the implementation method of second display function at the panel computer that makes of the present invention, the switching between the display adopting in step (S3) simulating signal switching technique to realize self exporting described exogenous signals and described CPU.
Implement a kind of panel computer and its implementation with second display function of the present invention, there is following beneficial effect: make panel computer achieve second display function as desktop computer or notebook computer, transmission exogenous signals antijamming capability is strong, display is smooth, there is not Caton phenomenon.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the structured flowchart that the present invention has the panel computer of second display function;
Fig. 2 is that the present invention makes panel computer have the implementation method schematic flow sheet of second display function;
Fig. 3 is the structural representation with the panel computer of second display function in the embodiment of the present invention;
Fig. 4 is the structured flowchart of USB HUB chip USB2514;
Fig. 5 is USB switch chip Dio3222 circuit diagram;
Fig. 6 is the circuit diagram of exogenous signals processing module chip DL-1x5;
Fig. 7 is another circuit diagram of exogenous signals processing module chip DL-1x5;
Fig. 8 is the circuit diagram of exogenous signals handover module chip TS3DV421;
Fig. 9 is the circuit diagram of cpu chip.
Embodiment
In order to there be understanding clearly to technical characteristic of the present invention, object and effect, now contrast accompanying drawing and describe the specific embodiment of the present invention in detail.
Disclose a kind of implementation method making panel computer have second display function in the embodiment of the present invention, the schematic flow sheet of its implementation refers to Fig. 2, mainly comprises the following steps:
S1: the exogenous signals of external equipment input is transferred in exogenous signals processing module 3 by USB communication module 2.
S2: exogenous signals processing module 3 processes exogenous signals, the exogenous signals after process is transferred in display handover module 4.
Exogenous signals processing module 3 adopts Displaylink technology to process the exogenous signals that external equipment inputs, and the exogenous signals in the present embodiment is vision signal.Displaylink technology realizes by USB interface a kind of interconnection technique that display is connected to computer, first DisplayLink is installed in external equipment drive, be responsible for the signal conversion between GPU and CPU, automatic Modulation, then DisplayLink adaptive compression is utilized automatically according to the situation compressing video information of CPU and USB bandwidth, the packet of compression is sent in exogenous signals processing module 3 fast by USB interface, allows user's almost imperceptible delay.Utilize Displaylink technology that the information such as video can be made smoothly by USB transmission interface, computer and multiple display device can be connected very simply and easily.
S3: the display that the exogenous signals after process self exports through display handover module 4 and described CPU1 switches.
Have employed the switching that simulating signal switching technique realizes between different display in this step.Analog switch is used for conducting or isolation mode analog signal, and supports the such as simulation application such as audio frequency and video data transmission, can support that high-speed data is handled up, have low conduction impedance characteristic, can reduce distorted signals.
S4: the exogenous signals after display 5 Graphics Processing.
Utilize the above-mentioned implementation method making panel computer have second display function, the embodiment of the invention also discloses a kind of panel computer with second display function, be illustrated in figure 1 the structured flowchart that the present invention has the panel computer of second display function.This panel computer, based on Android operation system, comprises CPU1, USB communication module 2, exogenous signals processing module 3, display handover module 4 and display 5.USB communication module 2 is connected with CPU1, and connects external equipment and exogenous signals processing module 3, is transferred in exogenous signals processing module 3 by the exogenous signals that external equipment inputs; Exogenous signals processing module 3 is for the treatment of exogenous signals; Display handover module 4 is connected with CPU1, exogenous signals processing module 3 respectively, for the display that the exogenous signals after hand-off process and CPU1 self export; Exogenous signals after display 5 Graphics Processing.
Be illustrated in figure 3 the structural representation with the panel computer of second display function in the embodiment of the present invention, in the present embodiment:
USB communication module 2 comprises USB HUB 21, USB switch 22 and USB interface expansion line, and USB HUB 21 is also known as usb hub, and a USB interface can be converted to multiple by one, and can make the device that these interfaces use simultaneously.USB HUB 21 comprises USB HUB chip, USB and general series interface, and HUB is hub, manages network is concentrated as a kind of shared device.In the present embodiment, USB HUB chip selects USB2514, and its structured flowchart refers to Fig. 4, includes 4 downlink ports, and very easy control is embedded on non-movable equipment, and data rate is fast.Upstream USB Data interface in chip USB 2514 is connected with CPU1, realizes communication between the two, to provide external USB interface, by using USB switch 22 and USB interface expansion line, can expand more function.USB switch 22 comprises analog switch chip, external HOST functional interface and internal vision signal input function can be realized, chip Dio3222 is selected in the present embodiment, its circuit diagram refers to Fig. 5, wherein, external equipment is connected by USB interface with USB switch 22, USB-HOST-DP1 with the USB-HOST-DN1 interface in chip Dio3222 is connected with the Port#1 interface in chip USB 2514.
Exogenous signals processing module 3 comprises SDRAM and the chip based on Displaylink technology, SDRAM is the cache chip of the chip based on Displaylink technology, SDRAM is synchronous DRAM, it is a kind of type of memory of widespread use on PC computer, can synchronous working with CPU, in the N-free diet method cycle, reduce data transfer delay.Adopt Displaylink adaptive compression automatically according to the situation compression exogenous signals of CPU and USB bandwidth in external equipment, packet after compression passes through USB communication module 2 fast transport in exogenous signals processing module 3, and in other embodiments, also can utilize the virtual networking of USB, by the long-range display of real-time performance and operating computer, display can not be connected with external equipment by USB communication module 2, but connected by network, so greatly extend the distance between display and computer.In the present embodiment, chip based on Displaylink technology selects DL-1x5, its circuit diagram refers to Fig. 6, interface U12_DL_USB+_U12, U12_DL_USB-_U12 in chip DL-1x5 and chip Dio3222 connect one to one respectively, be transferred in exogenous signals processing module 3 with the exogenous signals realized in external equipment by USB communication module 2, wherein exogenous signals is vision signal.In the present embodiment, exogenous signals after display processing module 3 processes is LVDS, LVDS is Low Voltage Differential Signal, a kind of signal transfer mode, because it has low-power consumption, the compatibility of LVPS, low noise, strong noise rejection ability, reliably Signal transmissions, is widely used in LCD Interface.
Display handover module 4 comprises simulating signal switch chip, and in the present embodiment, select chip TS3DV421 with the switching between the exogenous signals after realizing processing and the display that exports of CPU1 self, its circuit diagram refers to Fig. 8.TS3DV421 is 4 passage difference 2:1 multiplexer/demultiplexer digital video switch, controlled by single selection input end, and any GPIO port of system can be connected to by external voltage system, there is compatible with HDMI c1.3 DVI 1.0 high speed digital interface, low crosstalk, interrupting performance, offsets between low level, the characteristics such as low input/output capacitance.Another part circuit diagram of the chip DL-1x5 in exogenous signals processing module 3 refers to Fig. 7, the circuit diagram of CPU1 chip refers to Fig. 9, wherein, the annexation of the chip TS3DV421 in display the handover module 4 and chip DL-1x5 in exogenous signals processing module 3 is: interface LVDSB_TX0_N, LVDSB_TX0_P, LVDSB_TX1_N, LVDSB_TX1_P, LVDSB_TX2_N, LVDSB_TX2_P, LVDSB_CLK_N and LVDSB_CLK_P in chip TS3DV421 and chip DL-1x5 connect one to one respectively; The annexation of the chip in chip TS3DV421 and the CPU1 in display handover module 4 is: interface LVDS1_TX0_N, LVDS1_TX0_P, LVDS1_TX1_N, LVDS1_TX1_P, LVDS1_TX2_N, LVDS1_TX2_P, LVDS1_CLK_N and LVDS1_CLK_P in chip TS3DV421 and CPU1 chip connect one to one respectively, thus the switching between the display that exports of the exogenous signals realized after process and CPU1 self.In the present embodiment, exogenous signals after exogenous signals processing module 3 processes is sent in display handover module 4, and and switch between the display of panel computer self, thus achieve the function that panel computer uses as second display, in addition, adopt said method to carry out Signal transmissions, not only antijamming capability is strong, and display is smooth, can not there is Caton phenomenon.
Display 5 is for the exogenous signals after Graphics Processing, display 5 is in the present embodiment LCD, the structure of LCD is in the middle of the glass that two panels is parallel, place liquid crystal, the two tiny electric wires having many vertical and levels in the middle of sheet glass, control shaft-like crystal molecular changes direction through whether being energized, light refraction is out produced picture.
Based on the explanation in above-described embodiment, the main modular that panel computer in embodiment realizes second display function comprises USB communication module 2, exogenous signals processing module 3, display handover module 4, wherein USB communication module 2 is mainly used in realizing the communication between external equipment and exogenous signals processing module 3, exogenous signals processing module 3 is mainly for the treatment of the exogenous signals from external equipment, and display handover module 4 switches for the treatment of exogenous signals afterwards and between the display of panel computer self.The concrete structure of each module can designed, designed as required, is not limited to the chip selected in above-described embodiment or other ingredients.In addition, in an embodiment, panel computer inside can be integrated in, also can be processed into separately a module.
Popularizing gradually along with panel computer simultaneously, the above-mentioned panel computer with second display function is not restricted to the panel computer based on Android operation system, is equally also applicable to the panel computer based on other operating systems such as Windows operating system etc.
By reference to the accompanying drawings embodiments of the invention are described above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that present inventive concept and claim protect; also can make a lot of form, these all belong within protection of the present invention.
Claims (8)
1. one kind has the panel computer of second display function, comprise CPU (1), display (5), it is characterized in that, described panel computer also comprises the USB communication module (2) be connected with external equipment and described CPU (1) respectively, the exogenous signals processing module (3) be connected with described USB communication module (2), the display handover module (4) be connected with described CPU (1) and described exogenous signals processing module (3) respectively, described display (5) is connected with described display handover module (4), wherein, described USB communication module (2) realizes the communication between the exogenous signals of described external equipment input and described exogenous signals processing module (3), described exogenous signals processing module (3) is for being processed into LVDS by described exogenous signals, the display that described display handover module (4) self exports for switching described LVDS and described CPU (1), described display (5) is for showing described LVDS, and described exogenous signals is vision signal.
2. the panel computer with second display function according to claim 1, it is characterized in that, described USB communication module (2) comprises USB HUB (21), USB switch (22) and USB interface expansion line, described USB HUB (21) is connected with described CPU (1), to provide circumscribed USB interface; Described USB switch (22) is connected with described USB HUB (21), realizes USB HOST function and vision signal input function.
3. the panel computer with second display function according to claim 2, is characterized in that, described exogenous signals processing module (3) comprises SDRAM and the chip based on Displaylink technology.
4. the panel computer with second display function according to claim 3, is characterized in that, described display handover module (4) comprises simulating signal switch chip.
5. the panel computer with second display function according to claim 4, is characterized in that, described panel computer comprises the panel computer with Android operation system.
6. utilize the panel computer described in claim 1 to make it have an implementation method for second display function, it is characterized in that, comprise the following steps:
(S1) exogenous signals of described external equipment input is transferred in described exogenous signals processing module (3) by described USB communication module (2);
(S2) described exogenous signals is processed into LVDS by described exogenous signals by described exogenous signals processing module (3), and the described exogenous signals after process is transferred in described display handover module (4);
(S3) display that the described exogenous signals after process self exports through described display handover module (4) and described CPU (1) switches;
(S4) the described exogenous signals after described display (5) Graphics Processing.
7. the implementation method making panel computer have second display function according to claim 6, is characterized in that, adopts Displaylink technology to process described exogenous signals in step (S2).
8. the implementation method making panel computer have second display function according to claim 6, it is characterized in that, the switching between the display adopting in step (S3) simulating signal switching technique to realize self exporting described exogenous signals and described CPU (1).
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| CN104460856A (en) * | 2013-09-13 | 2015-03-25 | 友碁科技股份有限公司 | Tablet computer |
| CN106094623B (en) * | 2014-07-25 | 2018-08-07 | 山东中鸿云计算技术有限公司 | A kind of cloud terminal USB set wire module managed concentratedly |
| CN106155210A (en) * | 2016-08-17 | 2016-11-23 | 天津市英贝特航天科技有限公司 | A kind of reinforcing panel computer based on COM E specification |
| CN107610624B (en) * | 2017-08-23 | 2020-12-01 | 深圳易普森科技股份有限公司 | Display link driving type automatic horizontal screen control method and system |
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