CN100385497C - LCD driver of mobile communication terminal and its method - Google Patents
LCD driver of mobile communication terminal and its method Download PDFInfo
- Publication number
- CN100385497C CN100385497C CNB2005100635941A CN200510063594A CN100385497C CN 100385497 C CN100385497 C CN 100385497C CN B2005100635941 A CNB2005100635941 A CN B2005100635941A CN 200510063594 A CN200510063594 A CN 200510063594A CN 100385497 C CN100385497 C CN 100385497C
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- China
- Prior art keywords
- lcd panel
- image data
- random access
- lower side
- side direction
- Prior art date
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3674—Details of drivers for scan electrodes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
- G09G2310/0278—Details of driving circuits arranged to drive both scan and data electrodes
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/12—Frame memory handling
- G09G2360/127—Updating a frame memory using a transfer of data from a source area to a destination area
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The invention relates to an LCD driver of a mobile communication terminal and method of the same, the object is that: after a frame of image data is divided and stored in two graph random memorys (GRAM) on the basis of a centre of an LCD panel, the image data are respectively transmitted to an upper side region and a lower side region to display the image thereby improve image quality. Thus, the LCD driver of a mobile communication terminal according to the invention is characterised in that: the LCD driver includes two graph random memorys 431, 432 which divides the frame of image data transmitted by a host memory 470 into 1/2 and stores of two half; a source driver 410 which inputs a row of image data from the graph random access memorys 431, 432 and transmits the image data to a source line of the LCD panel in every horizontal circulation; a door driver 420 which orderly outputs scanning pulses of horizontal lines corresponding to an upper side direction and a lower side direction according to each horizontal circulation and on the basis of a centre of the LCD panel for displaying the image data stored in the graph random access memorys 431, 432.
Description
Technical field
The present invention relates to a kind of LCD display device, especially a kind of LCD driver of mobile communication terminal and method thereof.
Background technology
Along with the high speed development of informationized society, the scope of application of display device also obtains enlarging gradually.Especially since LCD (Liquid Crystal Display) to have image quality good, frivolous, and advantage such as power consumption is low is widely used in the display device of mobile communication terminal.
At present, released the mobile communication terminal (hereinafter to be referred as " mobile phone ") that possesses the LCD panel of supporting colour.
As shown in Figure 1, the LCD drive unit of mobile phone comprises in the prior art: store the image random access memory 130 by the image data of mainframe memory 170 transmission, at above-mentioned image random access memory 130 inputs 1 row's image data, be transferred to the Source drive 110 of LCD panel (not shown) source line, output shows the gate driver 120 of LCD panel (not shown) the horizontal line address of above-mentioned image random access memory 130 image datas, control the image input of above-mentioned image random access memory 130 and the controller 140 of output, oscillator signal with oscillating portion 160 is as the criterion, and the clock generating unit 150 of clock is provided for above-mentioned controller 140.
Below, specify the operational process of lcd driver module in the prior art.
Clock generating unit 150 is as the criterion with the oscillator signal of oscillating portion 160, provides clock to controller 140;
At this moment, if at LCD panel (not shown) show image, then controller 140 will be stored into by the corresponding image data of 1 frame of mainframe memory 170 transmission among the image random access memory 130;
Then, controller 140 by control chart as random access memory 130, when Source drive 110 is exported the image data of arranging corresponding to LCD panel 1, by horizontal line address (Y address) the output scanning pulse of control gate driver 120 to the above-mentioned 1 row's image data of demonstration;
At this moment, gate driver 120 is arranged image data by Source drive 110 to the source of LCD panel (not shown) line output 1 after the pulse of LCD panel (not shown) output scanning.Above-mentioned scanning impulse is exported as shown in Figure 3 successively.
Carry out above-mentioned operational process repeatedly, all output to LCD panel (not shown) up to 1 frame image data.
That is,,, provide 1 row's image data for each horizontal cyclic by Source drive 110 in order to store the image data of image random access memory 130 into to the transmission of LCD panel if when supporting the LCD panel of 176H*240V pixel.At this moment, specify horizontal line address successively by gate driver 120 from 00h to Efh.
Thereupon, as shown in Figure 2,1 frame image data projects on the LCD panel (not shown) with scan mode, thereby shows this image.
In the prior art, according to the scanning impulse that drives by gate driver, in a row transmit data successively from upper end, LCD panel left side.At this moment, when causing the position at rear portion to lack if forward part is furnished with too much position, there be the problem of the image quality of the middle section of LCD panel and underside area than the relative reduction of upper-side area.
Technology contents
The object of the present invention is to provide a kind of LCD driver of mobile communication terminal and method thereof, to improve image quality.
The invention is characterized in: with 1 frame image data cut apart be stored into 2 image random access memory (GRAM) after, central authorities are as the criterion with the LCD panel, are transferred to upper-side area and underside area respectively and show this image, thereby improve image quality.
To achieve these goals, the invention provides a kind of LCD driver of mobile communication terminal, it comprises: 1 frame image data of mainframe memory transmission is divided into 1/2 and 2 image random access memory storing respectively by the central water horizontal line of LCD panel; According to each horizontal cyclic, read respectively with LCD panel central authorities from described image random access memory and to be as the criterion, corresponding to side direction on it and lower side to 1 horizontal line image data, be transferred to the Source drive of LCD panel source line; According to each horizontal cyclic, the LCD panel central authorities that are stored into the image data of above-mentioned image random access memory with demonstration are as the criterion, export successively corresponding to last side direction and lower side to the gate driver of horizontal scanning impulse, wherein, last side direction is taked scan mode from top to bottom, and lower side is to the scan mode of taking from top to bottom.
In order better to realize goal of the invention, the present invention also provides a kind of mobile communication terminal LCD panel driving method, and it may further comprise the steps: 2 image random access memory are set; Store the 1/2 frame image data that is divided into by the LCD panel central water horizontal line that shows 1 frame image respectively in above-mentioned 2 image random access memory; According to each horizontal cyclic, to LCD panel output with LCD panel central authorities be as the criterion select to go up side direction and lower side to 1 horizontal line be the scanning impulse of purpose, wherein, last side direction is taked scan mode from top to bottom, and lower side is to the scan mode of taking from top to bottom; According to each horizontal cyclic, read respectively with LCD panel central authorities in above-mentioned 2 image random access memory and to be as the criterion, upwards side direction and lower side are transferred to the LCD panel to 1 horizontal image data of projection.
According to above-mentioned mobile communication terminal LCD driving method of the present invention, wherein: during the output scanning pulse, central authorities are as the criterion with the LCD panel, in the recurrent selection side direction and lower side to horizontal line, select earlier lower side to delegation select the delegation of side direction again, perhaps select earlier the last delegation of side direction select again lower side to delegation.
As mentioned above, the present invention possesses 2 image random access memory, and the image data of 1/2 frame is transferred to the LCD panel respectively, stablizes sharing of data bit thereby impel, and improves image quality.
Particularly, according to the present invention,,, share sufficient data bit at LCD panel middle body, thereby improve image quality to upside and downside samsara projection image data by being as the criterion with LCD panel central authorities.
Description of drawings
Fig. 1 is the LCD driving device structure figure of mobile phone in the prior art;
Fig. 2 is a LCD scan method synoptic diagram among Fig. 1;
Fig. 3 is the scanning impulse oscillogram of gate driver among Fig. 1;
Fig. 4 is the LCD driving device structure figure for the embodiment of the invention;
Fig. 5 is a LCD scan mode synoptic diagram among Fig. 4;
Fig. 6 is the scanning impulse oscillogram of gate driver among Fig. 4;
Fig. 7 is the moving method flow diagram of LCD of the present invention.
Wherein, under the Reference numeral:
110: Source drive 120: gate driver
130: image random access memory (GRAM) 140: controller
150: clock generator 160: concussion portion
170: mainframe memory 410: Source drive
420: gate driver 431,432: image random access memory (GRAM)
440: controller 450: clock generator
460: concussion portion 470: mainframe memory
Embodiment
The present invention is described in detail below in conjunction with drawings and Examples.
Among the present invention, identical with method in the prior art in the process of LCD panel show image.Therefore, in the embodiment of the invention, the technology contents that proves absolutely core of the present invention inadequately will be omitted.
Fig. 4 is the LCD driving device structure figure for the embodiment of the invention.As shown in the figure, identical with circuit among Fig. 1, it comprises Source drive 410, gate driver 420, controller 440, clock generating unit 450, oscillating portion 460.Include the 1 frame image data of cutting apart by mainframe memory 470 transmission with 1/2 in addition, and 2 the image random access memory 431,432 that respectively store.
Above-mentioned image random access memory 431,432 is as the criterion with LCD central authorities, is used to store each image data that is presented at LCD panel upper-side area and underside area.
As mentioned above, in conjunction with Fig. 4 and Fig. 7, LCD driving method flow process of the present invention comprises the steps:
Step S1 is provided with 2 image random access memory 431,432;
Step S2, if at LCD panel (not shown) show image of 176 (H) * 240 (V) pixel, be divided into corresponding to horizontal line (the 1/2 frame image data of 00h～6Eh) (380,160bit=176H*120V*18bit-RGB) with corresponding to horizontal line (the 1/2 frame image data of 6Eh～EFh), and be stored into image random access memory 431,432 respectively by 1 frame image data of mainframe memory 470 transmission;
Step S3, according to each horizontal cyclic, above-mentioned 2 image random access memory 431,432 read respectively with LCD panel central authorities be as the criterion, side direction and lower side are transferred to the LCD panel to 1 horizontal image data of projection on it.
Wherein, the following operation of the concrete execution of this step S3:
Meanwhile, 440 control gate drivers 420 of controller make its output corresponding to the scanning impulse of projection by the horizontal line address of 1 row's image data of image random access memory 431,432 samsaras output.Above-mentioned scanning impulse is exported as shown in Figure 6 successively;
As shown in Figure 5,1 row's image data by 431 outputs of image random access memory is to be as the criterion with LCD panel (not shown) central authorities, project its upside successively, and be that central authorities with LCD panel (not shown) are as the criterion, project its downside successively by 1 row's image data of image random access memory 432 output.
Thus, 1/2 frame image data is all to be transferred to LCD panel (not shown) by image random access memory 431,432, thereby shows corresponding image.
The embodiment that at first drives the data of image random access memory 432 has been set forth in above narration, but also can at first drive the data of image random access memory 431.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (3)
1. LCD driver of mobile communication terminal,
It is characterized in that: comprising:
1 frame image data of mainframe memory transmission is divided into 1/2 and 2 image random access memory storing respectively by the central water horizontal line of LCD panel;
According to each horizontal cyclic, read respectively with LCD panel central authorities from described image random access memory and to be as the criterion, corresponding to side direction on it and lower side to 1 horizontal line image data, be transferred to the Source drive of LCD panel source line;
According to each horizontal cyclic, the LCD panel central authorities that are stored into the image data of above-mentioned image random access memory with demonstration are as the criterion, export successively corresponding to side direction on it and lower side to the gate driver of horizontal scanning impulse, wherein, last side direction is taked scan mode from top to bottom, and lower side is to the scan mode of taking from top to bottom.
2. a mobile communication terminal LCD panel driving method is characterized in that, may further comprise the steps:
2 image random access memory are set;
Store the 1/2 frame image data that is divided into by the LCD panel central water horizontal line that shows 1 frame image respectively in above-mentioned 2 image random access memory;
According to each horizontal cyclic, to LCD panel output with LCD panel central authorities be as the criterion select to go up side direction and lower side to 1 horizontal line be the scanning impulse of purpose, wherein, last side direction is taked scan mode from top to bottom, and lower side is to the scan mode of taking from top to bottom;
According to each horizontal cyclic, above-mentioned 2 image random access memory read respectively with LCD panel central authorities be as the criterion, side direction and lower side are transferred to the LCD panel to 1 horizontal image data of projection on it.
3. mobile communication terminal LCD driving method according to claim 2, it is characterized in that: during the output scanning pulse, central authorities are as the criterion with the LCD panel, in the recurrent selection side direction and lower side to horizontal line, select earlier lower side to delegation select the delegation of side direction again, perhaps select earlier the last delegation of side direction select again lower side to delegation.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020040053791A KR20060004856A (en) | 2004-07-10 | 2004-07-10 | Driving apparatus and method for liquid crystal display of mobile communication terminal |
| KR1020040053791 | 2004-07-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1719506A CN1719506A (en) | 2006-01-11 |
| CN100385497C true CN100385497C (en) | 2008-04-30 |
Family
ID=35931324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100635941A Expired - Fee Related CN100385497C (en) | 2004-07-10 | 2005-04-13 | LCD driver of mobile communication terminal and its method |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR20060004856A (en) |
| CN (1) | CN100385497C (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05143019A (en) * | 1991-11-18 | 1993-06-11 | Nec Gumma Ltd | Matrix type liquid crystal display device |
| US6023252A (en) * | 1995-04-05 | 2000-02-08 | Citizen Watch Co., Ltd. | Liquid crystal display device |
| JP2003005726A (en) * | 2001-06-25 | 2003-01-08 | Kyocera Corp | Liquid crystal display device and portable terminal or display equipment |
| JP2003015603A (en) * | 2001-06-29 | 2003-01-17 | Pioneer Electronic Corp | Method for driving plasma display panel and driving device therefor |
| EP1353319A1 (en) * | 2002-04-04 | 2003-10-15 | Lg Electronics Inc. | Dual scan method of matrix display panel |
| CN1472718A (en) * | 2002-07-11 | 2004-02-04 | ������������ʽ���� | Display device and method |
-
2004
- 2004-07-10 KR KR1020040053791A patent/KR20060004856A/en not_active Application Discontinuation
-
2005
- 2005-04-13 CN CNB2005100635941A patent/CN100385497C/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05143019A (en) * | 1991-11-18 | 1993-06-11 | Nec Gumma Ltd | Matrix type liquid crystal display device |
| US6023252A (en) * | 1995-04-05 | 2000-02-08 | Citizen Watch Co., Ltd. | Liquid crystal display device |
| JP2003005726A (en) * | 2001-06-25 | 2003-01-08 | Kyocera Corp | Liquid crystal display device and portable terminal or display equipment |
| JP2003015603A (en) * | 2001-06-29 | 2003-01-17 | Pioneer Electronic Corp | Method for driving plasma display panel and driving device therefor |
| EP1353319A1 (en) * | 2002-04-04 | 2003-10-15 | Lg Electronics Inc. | Dual scan method of matrix display panel |
| CN1450516A (en) * | 2002-04-04 | 2003-10-22 | Lg电子株式会社 | Dual scan method of matrix display panel |
| CN1472718A (en) * | 2002-07-11 | 2004-02-04 | ������������ʽ���� | Display device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20060004856A (en) | 2006-01-16 |
| CN1719506A (en) | 2006-01-11 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: LANGCHAO LEJIN DIGITAL MOBILE COMMUNICATION CO., L Free format text: FORMER OWNER: LG ELECTRONICS (CHINA) R + D CENTER CO., LTD. Effective date: 20120323 |
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| C41 | Transfer of patent application or patent right or utility model | ||
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Free format text: CORRECT: ADDRESS; FROM: 100102 CHAOYANG, BEIJING TO: 264001 YANTAI, SHANDONG PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20120323 Address after: 264001 No. 228 Changjiang Road, Yantai economic and Technological Development Zone, Shandong, China Patentee after: Langchao Lejin Digital Mobile Communication Co., Ltd. Address before: Two Beijing 100102 Chaoyang District city in Wangjing Lize Park No. 203 Petrova building block B Patentee before: LG Electronic (China) Research and Development Center Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080430 Termination date: 20150413 |
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| EXPY | Termination of patent right or utility model |