CN204650972U

CN204650972U - Embedded photovoltaic liquid crystal drive display device

Info

Publication number: CN204650972U
Application number: CN201520296922.1U
Authority: CN
Inventors: 吴访升; 冯霏; 王为善
Original assignee: Changzhou Vocational Institute of Engineering
Current assignee: Changzhou Vocational Institute of Engineering
Priority date: 2015-05-11
Filing date: 2015-05-11
Publication date: 2015-09-16
Anticipated expiration: 2025-05-11

Abstract

The utility model relates to a kind of embedded photovoltaic liquid crystal drive display device, comprises 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 utility model, compared with traditional LCD display driver, reduces display color depth, reduces display buffer, reaches the object of low-power consumption; In some applied environment hypograph quality without any loss; And the utility model does not have compatibility issue, application program can use without the need to making any amendment for the utility model, cost-saving.

Description

Embedded photovoltaic liquid crystal drive display device

Technical field

The utility model relates to liquid crystal drive display technique field, especially a kind of display device 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.

Utility model content

The technical problems to be solved in the utility model is: provide a kind of embedded photovoltaic liquid crystal drive display device, well can not only carry out installation by adhering, and low in energy consumption, display frame quality is higher.

The utility model solves the technical scheme that its technical matters adopts: a kind of embedded photovoltaic liquid crystal drive display device, comprises 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 utility model 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.

Display packing of the present utility model is:

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).

The beneficial effects of the utility model are: one, compared with traditional LCD display driver, after adopting the utility model device, 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 utility model, cost-saving.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the utility model is further illustrated.

Fig. 1 is the structural schematic block diagram of the utility model photovoltaic liquid crystal display;

Fig. 2 is the process flow diagram of the utility model photovoltaic liquid crystal display.

Embodiment

With preferred embodiment, the utility model is described in further detail by reference to the accompanying drawings now.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present utility model are described in a schematic way, and therefore it only shows the formation relevant with the utility model.

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 utility model 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 the utility model device, be not only applicable to the liquid crystal of 15 cun, other sizes are also applicable to, the utility model device provides a kind of and cabinet complete machine, display, touch-screen etc. is 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 embodiment of the present utility model described in above instructions, various illustrating is not construed as limiting flesh and blood of the present utility model, 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 essence and the scope of utility model.

Claims

1. 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.

2. embedded photovoltaic liquid crystal drive display device as claimed in claim 1, is characterized in that: the first described ram set and the amount of capacity of the second ram set are 512K.