CN101692328A - Method for supplying power and driving display to monitor via USB interface - Google Patents
Method for supplying power and driving display to monitor via USB interface Download PDFInfo
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- CN101692328A CN101692328A CN200910035330A CN200910035330A CN101692328A CN 101692328 A CN101692328 A CN 101692328A CN 200910035330 A CN200910035330 A CN 200910035330A CN 200910035330 A CN200910035330 A CN 200910035330A CN 101692328 A CN101692328 A CN 101692328A
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- Liquid Crystal Display Device Control (AREA)
Abstract
The invention discloses a method for supplying power and driving display to monitor via a USB interface, which is characterized in that a USB interface is arranged on the monitor; direct current at 5V voltage and video signals of a computer host are transmitted to the monitor at the same time via a USB connecting line; power is supplied to a voltage regulator, a display screen image display drive circuit and an LED light-emitting module of a liquid crystal display for working by the direct current at 5V voltage; the video signals are transmitted to a signal processing unit by the USB connecting line; and the received signals are transmitted to the display screen by an image processing chip. The invention has the advantages that the monitor can work by connection of a USB line, and the monitor can be moved together with a laptop.
Description
Technical field
The present invention relates to a kind of method of work of display, is a kind of method that display power supply driving demonstration is provided by USB specifically.
Background technology
Existing USB display transmits by USB though realized image section, and its power unit still needs the alternating voltage input of 100V～240V.Principle of work is as depicted in figs. 1 and 2: 1) power supply input: 100～240V alternating voltage is at first handled through electromagnetic interference (EMI), then alternating voltage is carried out rectifying and wave-filtering, carry out transformation in order to export different magnitudes of voltage by transformer, and then carry out rectification and the DC voltage of 12～18V and the DC voltage of 5V are exported in filtering respectively, 12～18V DC voltage is input in the phase inverter loop, converting direct-current voltage into alternating-current voltage and amplification are used for the display backlight lamp, what the display backlight lamp adopted is cathode fluorescent tube, the DC voltage of 5V DC voltage process voltage adjuster output 3.3V and 1.8V is used to provide the power supply of integrated semiconductors such as mainboard program run chip and picture processing chip, needs high-tension alternating current when starting of cold cathode fluorescent tube and work; 2) signal Processing: corresponding software at first is installed on PC vision signal is exported with D+/D-differential signal mode USB interface, display changes the D+/D-differential signal that receives into Low Voltage Differential Signal (LVDS) through picture processing chip, export to LCDs at last. because this method must have the AC power input of 100V～240V, therefore display must be fixed on the relative fixed position of power supply, can't move simultaneously as second display and the notebook of notebook.
Summary of the invention
In order to overcome the deficiencies in the prior art, the purpose of this invention is to provide a kind of method that display power supply driving demonstration is provided by USB, this method is to drive LCD work by DC low-voltage, can realize just making display work, can realize that display can move simultaneously with notebook by the connection of a USB line.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of method that provides display power supply drive to show by USB, and the concrete steps of this method are as follows:
1) host computer is passed to display screen by USB interface with signal; The display backlight lamp adopts luminous group of LED; On display, be provided with USB interface;
2) USB interface that the 5V d. c. voltage signal and the vision signal of main frame is transferred to display simultaneously by the USB connecting line;
3) USB interface of display is the luminous group of work of LED of voltage supplied regulator, display image display driver circuit and LCDs simultaneously of the 5V DC voltage that receives, and this moment, luminous group of LED obtained behind the power supply luminous; Simultaneously the USB interface of display with video signal transmission to signal processing unit;
4) voltage regulator is distributed into 1.8V DC voltage and 3.3V DC voltage with the 5V DC voltage and is respectively the program run chip and the picture processing chip power supply, this moment, picture processing chip received the signal of signal processing unit output, and then this signal is transferred to display screen after treatment.
Principle of work of the present invention is: the power supply input: by the 5V DC voltage of USB output on notebook or the desktop computer, offer 1.8V DC voltage and 3.3V DC voltage that voltage regulator makes it written-out program running chip and picture processing chip needs on the one hand, the 5V DC voltage offers the required power supply of image display driver circuit and the luminous group of required electricity consumption of display backlight LED on the display screen simultaneously; Signal Processing: corresponding software at first is installed on PC vision signal is exported with D+/D-differential signal mode USB interface, display changes the D+/D-differential signal that receives into Low Voltage Differential Signal (LVDS) through picture processing chip, exports to LCDs at last.
Compared with prior art, the present invention does not re-use cathode fluorescent tube and does traditional display screen backlight, and adopt luminous group of LED as LCDs backlight, so only need the low voltage and direct current just can driving display, USB 5V DC voltage by notebook provides power supply to display, simplified the connection of display, can realize simultaneously that display cooperates the mobile use display of notebook only to be connected to notebook or desktop computer by a USB line, notebook or desktop computer are given display by USB port output 5V direct supply and vision signal.
Description of drawings
Fig. 1 is the power supply input service schematic diagram of prior art;
Fig. 2 is the signal Processing fundamental diagram of prior art;
Fig. 3 is a fundamental diagram of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
As shown in Figure 3, a kind of method that provides display power supply drive to show by USB, the concrete steps of this method are: corresponding software at first is installed on host computer, can be allowed vision signal directly from the USB transmission of host computer; The backlight of display screen adopts luminous group of LED; On display, be provided with USB interface; The USB interface that the 5V d. c. voltage signal and the vision signal of main frame is transferred to display simultaneously by a USB connecting line then; The USB interface of display transfers to voltage regulator, display image display driver circuit and LED-backlit lamp simultaneously with the 5V DC voltage that receives and makes their work, and is luminous behind luminous group of acquisition of the LED this moment power supply; Simultaneously the USB interface of display with video signal transmission to signal processing unit; Voltage regulator is distributed into 1.8V DC voltage and 3.3V DC voltage with the 5V DC voltage and is respectively the program run chip and the picture processing chip power supply, this moment, picture processing chip received the signal of signal processing unit output, and then this signal is transferred to display screen after treatment.The present invention since adopted can by the driving of low voltage and direct current just can be luminous luminous group of LED backlight as display screen, so need only a USB line connection main frame and display just can make display work; When signal transmits, also need only and just the vision signal on the PC can be exported with D+/D-differential signal mode USB interface by same USB connecting line, signal processing unit changes the D+/D-differential signal that receives into Low Voltage Differential Signal (LVDS) through picture processing chip then, exports to LCDs at last; Therefore the present invention can realize the portable function that display can be mobile simultaneously with notebook, and power saving.
The above only is a preferred implementation of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the principle of the invention, can also make some modification and improvement, these also should be considered as belonging to protection scope of the present invention.
Claims (1)
1. method that provides display power supply drive to show by USB is characterized in that the concrete steps of this method are as follows:
1) host computer is passed to display screen by USB interface with signal; The display backlight lamp adopts luminous group of LED; On display, be provided with USB interface;
2) USB interface that the 5V d. c. voltage signal and the vision signal of main frame is transferred to display simultaneously by the USB connecting line;
3) USB interface of display is the luminous group of work of LED of voltage supplied regulator, display image display driver circuit and LCDs simultaneously of the 5V DC voltage that receives, and this moment, luminous group of LED obtained behind the power supply luminous; Simultaneously the USB interface of display with video signal transmission to signal processing unit;
4) voltage regulator is distributed into 1.8V DC voltage and 3.3V DC voltage with the 5V DC voltage and is respectively the program run chip and the picture processing chip power supply, this moment, picture processing chip received the signal of signal processing unit output, and then this signal is transferred to display screen after treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910035330A CN101692328A (en) | 2009-09-25 | 2009-09-25 | Method for supplying power and driving display to monitor via USB interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910035330A CN101692328A (en) | 2009-09-25 | 2009-09-25 | Method for supplying power and driving display to monitor via USB interface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101692328A true CN101692328A (en) | 2010-04-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910035330A Pending CN101692328A (en) | 2009-09-25 | 2009-09-25 | Method for supplying power and driving display to monitor via USB interface |
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| Country | Link |
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| CN (1) | CN101692328A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101887354A (en) * | 2010-05-26 | 2010-11-17 | 上海北大方正科技电脑系统有限公司 | Visual signal transmission and low voltage power supply combined system |
| CN111740477A (en) * | 2020-07-28 | 2020-10-02 | 深圳市航顺芯片技术研发有限公司 | Display screen control system and electronic equipment |
-
2009
- 2009-09-25 CN CN200910035330A patent/CN101692328A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101887354A (en) * | 2010-05-26 | 2010-11-17 | 上海北大方正科技电脑系统有限公司 | Visual signal transmission and low voltage power supply combined system |
| CN111740477A (en) * | 2020-07-28 | 2020-10-02 | 深圳市航顺芯片技术研发有限公司 | Display screen control system and electronic equipment |
| CN111740477B (en) * | 2020-07-28 | 2021-03-16 | 深圳市航顺芯片技术研发有限公司 | Display screen control system and electronic equipment |
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Open date: 20100407 |