CN104867466A - Embedded photovoltaic liquid crystal driving display method and device thereof - Google Patents
Embedded photovoltaic liquid crystal driving display method and device thereof Download PDFInfo
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- CN104867466A CN104867466A CN201510237624.XA CN201510237624A CN104867466A CN 104867466 A CN104867466 A CN 104867466A CN 201510237624 A CN201510237624 A CN 201510237624A CN 104867466 A CN104867466 A CN 104867466A
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Abstract
The invention relates to an embedded photovoltaic liquid crystal driving display method and a device thereof. The method comprises the steps that: firstly, a CPLD sends a display input instruction to a first RAM; at the same time, the CPLD sends the data of a second RAM connected with the CPLD to an interface of a VGA; when the displaying of one screen of data is finished, the CPLD sends an instruction to the first RAM to enable the RAM to be in a reading state and enable the second RAM to be in a writing state, the data of the first RAM is written into the second RAM, and one time of screen refreshing process. Compared with a conventional LCD display driver, the display color depth is reduced, the display buffer memory is decreased, and the purpose of low power consumption is achieved; the image quality has no losses under some application environments; in addition, the compatibility problem does not exist, and application programs can be used without any modification, and the cost is saved.
Description
Technical field
The present invention relates to liquid crystal drive display technique field, especially a kind of display technique utilizing CPLD to drive photovoltaic liquid crystal.
Background technology
The conventional computer used in fields such as industry, business mostly at present is and is made up of the cabinet complete machine of heaviness, display, keyboard, mouse, it is bulky, heavy, configuration is complicated, shared working area is also large, installation and operation there is inconvenience, especially to the unit of often variation needed for yard, and in aobvious little control support equipment, having the restriction of volume, when maybe needing to do embedded use, the inconvenience that existing equipment brings is just more aobvious outstanding.General portable computer is then difficult to be arranged in miscellaneous equipment, is difficult to do installation by adhering, it is high to the requirement of environment, and performance does not reach the General Requirements of technical grade yet.
LCD (liquid crystal display systems) color screen is widely used in handheld mobile device in multimedia.But the power consumption needed for LCD system occupies large ratio in a mobile device.A lot of to the power consumption research of CPU and storage system in the past, such as battery island, Clock Tree, dormancy awakening mechanism etc., they analyze from the angle of software and hardware, constantly reduce its power consumption, but be the research of being partial to single aspect for the low-power consumption majority of display system, and study the few of reduction power consumption from the angle of system, and along with multimedia application, the power consumption of this part is more and more important, and it directly determines the flying power of battery.Modern handsets has generally run an operating system, and conventional is WinCE or (SuSE) Linux OS.
Discovery Inseok Choi etc. were " International Symposium onLow Power Electronics and Design " (low power dissipation electron and design international conference) 2002 by prior art documents, " Low-Power Color TFT LCD Display for Hand-Held EmbeddedSystems " that 112-117 page is delivered, to reduce the size that display color depth reduces display buffer in (application of low-power-consumption color Thin Film Transistor (TFT) liquid crystal display in hand-held embedded system), thus reduce the object that the number of times reading SDRAM (Synchronous Dynamic Random Access Memory) reaches reduction power consumption, the reduction color depth used in document is by fixing method, extract the component of RGB three colors in original color data respectively, the higher information bit of getting wherein is reassembled into the color under low color depth pattern.So just make the size of display buffer reduce along with the reduction of display color depth, thus reach the object reducing system power dissipation.But the weak point of this method of above-mentioned document is that the reduction showing color depth has had influence on image quality to a certain extent, and cause the reduction of image quality, this is unacceptable in practical application.
Summary of the invention
The technical problem to be solved in the present invention is: propose a kind of embedded photovoltaic liquid crystal drive display packing and device thereof, well can not only carry out installation by adhering, and low in energy consumption, display frame quality is higher.
The technical solution adopted in the present invention is: a kind of embedded photovoltaic liquid crystal drive display packing, comprises the following steps:
1) CPLD device receives display input command and the display information received is sent in the first ram set temporary; Data in the second ram set be connected with CPLD device are delivered in Video Graphics Array VGA device simultaneously and show;
2) when display information temporary in the first ram set reaches display all over the screen, data temporary in the first ram set are all called in the second ram set by CPLD device; Now the first ram set become read states, second ram set become write state;
3) CPLD device calls the data in the second ram set and sends to LCD device to show by the interface of VGA device, completes and once shows brush screen;
4) step 1 is repeated) to step 3).
Meanwhile, present invention also offers a kind of embedded photovoltaic liquid crystal drive display device, comprise the first ram set, the second ram set, CPLD device, VGA device and LCD device; Described CPLD device is connected with the first ram set and the second ram set respectively; The output terminal of described CPLD device is connected with the input end of VGA device; The output terminal of described VGA device is connected with LCD device.
The present invention adds the second block RAM in a device, solves the conflict refreshing and scan, and affects image quality, cause the reduction of image quality; And the first described ram set and the amount of capacity of the second ram set are 512K.
The invention has the beneficial effects as follows: one, compared with traditional LCD display driver, after adopting apparatus of the present invention, reduce display color depth, reduce display buffer, reach the object of low-power consumption; In some applied environment hypograph quality without any loss; Two, this device does not have compatibility issue, and application program can use without the need to making any amendment for the present invention, cost-saving.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the structural schematic block diagram of photovoltaic liquid crystal display of the present invention;
Fig. 2 is the process flow diagram of photovoltaic liquid crystal display of the present invention.
Embodiment
The present invention is further detailed explanation with preferred embodiment by reference to the accompanying drawings now.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present invention are described in a schematic way, and therefore it only shows the formation relevant with the present invention.
Fig. 1 is the structural schematic block diagram of photovoltaic liquid crystal display.In Fig. 1, mechanism's block diagram comprises: input signal 1, first ram set 2, ram set 3, CPLD device 4, VGA device 5 and LCD device 6.Annexation: CPLD device 4 is connected with the first ram set 2; CPLD device 4 is connected with the second ram set 3; CPLD device 4 is connected with VGA device 5; VGA device 5 is connected with LCD device 6.
Fig. 2 is the embodiment of photovoltaic liquid crystal display.In Fig. 2, its display packing comprises the following steps:
1. the display information of reception sends in a RAM module 2 temporary by CPLD module 4, the data in the 2nd RAM module 3 is delivered to VGA display simultaneously;
2., when display information temporary in a RAM module 2 reaches display all over the screen, data temporary in a RAM module 2 are all called in the 2nd RAM module 3 by CPLD module 4;
3. CPLD module 4 is called the data in the 2nd RAM module 3 and is sent to LCD module 6 to show by USB interface module 5, completes and once shows brush screen;
4. repeat step 1. to step 3..
Fig. 1 experimental result condition: RAM capacity is: 512K, CPLD model is: XILINXXC95144XL, VGA and Hewlett-Packard 15 cun of liquid crystal display.The advantage of invention is: the present invention completes after screen data have shown, again by ram set 1 data write ram set 2 in (originally in general modfel, original color data buffer memory and display two operations are carried out simultaneously), therefore the power consumption refreshing LCD display also reduces greatly, and does not affect image quality.
The application scenario of apparatus of the present invention, be not only applicable to the liquid crystal of 15 cun, other sizes are also applicable to, apparatus of the present invention provide a kind of and cabinet complete machine, display, touch-screen etc. are combined, compact, be convenient to install and carry, convenient operation, have abundant meet U, be convenient to other opertaing devices supporting do embedded use, better than general portable computer performance, can widely use at industry, commercial field.
The just the specific embodiment of the present invention described in above instructions, various illustrating is not construed as limiting flesh and blood of the present invention, person of an ordinary skill in the technical field after having read instructions can to before described embodiment make an amendment or be out of shape, and do not deviate from the spirit and scope of the invention.
Claims (3)
1. an embedded photovoltaic liquid crystal drive display packing, is characterized in that comprising the following steps:
1) CPLD device receives display input command and the display information received is sent in the first ram set temporary; Data in the second ram set be connected with CPLD device are delivered in Video Graphics Array VGA device simultaneously and show;
2) when display information temporary in the first ram set reaches display all over the screen, data temporary in the first ram set are all called in the second ram set by CPLD device; Now the first ram set become read states, second ram set become write state;
3) CPLD device calls the data in the second ram set and sends to LCD device to show by the interface of VGA device, completes and once shows brush screen;
4) step 1 is repeated) to step 3).
2. an embedded photovoltaic liquid crystal drive display device, is characterized in that: comprise the first ram set, the second ram set, CPLD device, VGA device and LCD device; Described CPLD device is connected with the first ram set and the second ram set respectively; The output terminal of described CPLD device is connected with the input end of VGA device; The output terminal of described VGA device is connected with LCD device.
3. embedded photovoltaic liquid crystal drive display device as claimed in claim 2, is characterized in that: the first described ram set and the amount of capacity of the second ram set are 512K.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510237624.XA CN104867466A (en) | 2015-05-11 | 2015-05-11 | Embedded photovoltaic liquid crystal driving display method and device thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510237624.XA CN104867466A (en) | 2015-05-11 | 2015-05-11 | Embedded photovoltaic liquid crystal driving display method and device thereof |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2412235A (en) * | 2004-03-19 | 2005-09-21 | Seiko Epson Corp | Optoelectronic memory or display device |
| JP2007322830A (en) * | 2006-06-01 | 2007-12-13 | Toshiba Matsushita Display Technology Co Ltd | Display device and control method therefor |
| CN102831872A (en) * | 2012-09-05 | 2012-12-19 | 山东大学 | Field programmable gate array-based (FPGA-based) realization method for converting liquid crystal display (LCD) signal to video graphics array (VGA) signal |
| CN202711621U (en) * | 2012-06-08 | 2013-01-30 | 河北冀雅电子有限公司 | Portable electronic billboard |
| CN103854625A (en) * | 2014-03-28 | 2014-06-11 | 江苏理工学院 | Liquid crystal display device and display method based on CPLD (Complex Programmable Logic Device) |
| CN204010577U (en) * | 2014-08-22 | 2014-12-10 | 西安理想华夏科技创新有限公司 | A kind of advertising lamp box that parking space information is provided |
| CN204650972U (en) * | 2015-05-11 | 2015-09-16 | 常州工程职业技术学院 | Embedded photovoltaic liquid crystal drive display device |
-
2015
- 2015-05-11 CN CN201510237624.XA patent/CN104867466A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2412235A (en) * | 2004-03-19 | 2005-09-21 | Seiko Epson Corp | Optoelectronic memory or display device |
| JP2007322830A (en) * | 2006-06-01 | 2007-12-13 | Toshiba Matsushita Display Technology Co Ltd | Display device and control method therefor |
| CN202711621U (en) * | 2012-06-08 | 2013-01-30 | 河北冀雅电子有限公司 | Portable electronic billboard |
| CN102831872A (en) * | 2012-09-05 | 2012-12-19 | 山东大学 | Field programmable gate array-based (FPGA-based) realization method for converting liquid crystal display (LCD) signal to video graphics array (VGA) signal |
| CN103854625A (en) * | 2014-03-28 | 2014-06-11 | 江苏理工学院 | Liquid crystal display device and display method based on CPLD (Complex Programmable Logic Device) |
| CN204010577U (en) * | 2014-08-22 | 2014-12-10 | 西安理想华夏科技创新有限公司 | A kind of advertising lamp box that parking space information is provided |
| CN204650972U (en) * | 2015-05-11 | 2015-09-16 | 常州工程职业技术学院 | Embedded photovoltaic liquid crystal drive display device |
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Application publication date: 20150826 |