CN101399017B - Source electrode driver with image scrolling function - Google Patents
Source electrode driver with image scrolling function Download PDFInfo
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- CN101399017B CN101399017B CN2007101532212A CN200710153221A CN101399017B CN 101399017 B CN101399017 B CN 101399017B CN 2007101532212 A CN2007101532212 A CN 2007101532212A CN 200710153221 A CN200710153221 A CN 200710153221A CN 101399017 B CN101399017 B CN 101399017B
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- pixel value
- allocation index
- rheme
- impact damper
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Abstract
A source driver comprises a frame memory, a first line buffer and a second line buffer; wherein, the frame memory stores the position of pixel value of an image, the first line buffer latches the position of the pixel value in sequence and the position is from the first line buffer and provided with a first address index; the second line buffer latches the position of the pixel value continuouslyand the position is from the first line buffer and provided with a second address index. Then, the position of the pixel value is written into the frame memory, thus facilitating scrolling images. The invention provides a method for refreshing the frame memory in a source driver.
Description
Technical field
The present invention relates to a kind of device of source electrode driver, particularly relate to a kind of device of source electrode driver, be used for the turnup image.
Background technology
A kind of LCD comprises source electrode driver, be used for storing and the transmission core processor (for example: " central processing unit (CPU) " position of the pixel value of) a image is to the character line of panel.The position of existing source electrode driver transmission pixel value is via frame memory, and it is in order to bit of storage; With impact damper, its position that has allocation index in order to buffering is to data bus (data bus), and wherein allocation index distributes pixel value to each explicit address.When vertical turnup image, the position of pixel value with several images of allocation index loads impact damper continuously by frame memory.Therefore, when vertical turnup one image, the allocation index circuit in the impact damper distributes the position of each allocation index to allocation index, then, and according to allocation index, in the vertical direction address at relocation bit place in regular turn.
The sequence of allocation index is used for vertical turnup image, and horizontal turnup image, can not redistribute the address in the horizontal direction, position of pixel value with the sequence of identical allocation index.At this, must reach some application by horizontal turnup image, similarly be screen protection (screen saver) and picture presentation (image presentation), wherein the meaning of picture presentation is to show the picture that moves through the frequentation different directions.For horizontal turnup image, central processing unit produces the position of the pixel value of new image, and the refresh frame storer, to store the position of new pixel value, makes indexed addressing method (indexingalgorithm) have no usage fully.Central processing unit must produce the position of the pixel value of an image constantly again, in order to horizontal turnup image.From the above, existing LCD is not only wasted extra energy, and the method for turnup image, too relies on central processing unit, so that usefulness is low.
Based on above-mentioned reason, need a kind of new source electrode driver, the new method of refresh frame storer is provided, be used for the turnup image, and do not need to produce again the position of the pixel value of image.
Summary of the invention
The purpose of this invention is to provide a kind of source electrode driver, in order to the refresh frame storer, the image of turnup horizontal direction makes central processing unit not need to produce again constantly the position of pixel value by this.According to the embodiment of the invention, source electrode driver comprises: frame memory, first impact damper, second impact damper.The position of the pixel value of frame memory stores image wherein; First impact damper latchs the position of the pixel value that is come by this frame memory continuously, and it has first allocation index; Second impact damper latchs the position of the pixel value that is come by this first impact damper continuously, and it has second allocation index.Then, the position of pixel value writes this frame memory, turnup image by this.
According to the invention described above embodiment, the position of the pixel value of image originally is used for the refresh frame storer, but the position of the pixel value of image originally has different allocation indexs.When the position of pixel value during through second impact damper, second allocation index distributes the address of the position of pixel value.In case the place value of pixel writes this frame memory, then, first impact damper latchs the position of the pixel value with second allocation index, and then, the position exports digital/analog converter (digital-to-analog converter) to.On the horizontal direction of LCD screen, redistribute the address of pixel by second allocation index.Therefore, do not need to produce the position of new pixel value, more definite, by the position of replacement pixel value, reach the purpose of turnup image.
According to another embodiment of the present invention, provide a kind of in source electrode driver the method for refresh frame storer, by the constitutive requirements of the previous described source electrode driver of operation, reach the purpose of refresh frame storer.
Below will do detailed description to above-mentioned explanation and ensuing embodiment, and explain the invention provides further with an embodiment.
Description of drawings
For above and other objects of the present invention, feature, advantage and embodiment can be become apparent, being described in detail as follows of accompanying drawing:
Fig. 1 shows the functional block diagram according to a kind of source electrode driver of one embodiment of the invention.
Fig. 2 shows a kind of circuit diagram according to one embodiment of the invention.
Fig. 3 shows the process flow diagram according to the method for a kind of refresh frame storer of one embodiment of the invention.
The reference numeral explanation
100: source electrode driver 102: frame memory
106: the first allocation indexs of 104: the first impact dampers
110: the second allocation indexs of 108: the second impact dampers
112: digital/analog converter 114: central processing unit
204: the first allocation index circuit 206: trigger
208; 210: the second switchs of the second allocation index circuit
212: latch cicuit 214: amplifier
Switch latched step at 302: the first in 216: the first
Latch step 306 at 304: the second: write step
Embodiment
In order to make narration of the present invention more detailed and complete, can be with reference to following diagram and various embodiment, label identical in the icon is represented identical assembly.
Please refer to Fig. 1, it shows the functional block diagram according to a kind of source electrode driver of one embodiment of the invention.A kind of source electrode driver 100 comprises: frame memory 102, first impact damper 104, second impact damper 108.The position of the pixel value of image is stored in frame memory 102, and when beginning turnup image, the input/output end port of frame memory 102 is linked to first impact damper 104, and wherein first impact damper 104 can latch the position of pixel value.Then, by first allocation index 106 distribute in regular turn latch the position the address, wherein first allocation index 106 can be the default value of allocation index, central processing unit 114 distribute by this pixel value the position the address.Then, have the position of the pixel value of first allocation index 106, export data bus 116 to by first impact damper 104, it is linked to the digital/analog converter 112 and second impact damper 108.
The position of the pixel value of image according to first allocation index 106, makes image be presented at position correct on the screen after being handled by digital/analog converter 112.Simultaneously, second impact damper 108 latchs the position that is exported to the pixel value of data bus 116 by first impact damper 104.Then, in second impact damper 108, produce second allocation index 110 by central processing unit and replace first allocation index 106, be used for distributing the address of the position of pixel value, wherein second allocation index 110 is different from first allocation index 106.Then, have the position of the pixel value of second allocation index 110, write frame memory 102 by second impact damper 108.Then, have the position of the pixel value of second allocation index 110, be latched in first impact damper 104, and export data bus 116 to.Then, replace image, meaning is the turnup image.
Please refer to Fig. 2, it shows according to one embodiment of the invention, is the circuit diagram of each function square among Fig. 1, and particularly relevant for the circuit diagram of first impact damper 104 and second impact damper 108.First impact damper 104 comprises latch cicuit (latch circuit) 212, amplifier (amplifier) 214, first switch (first switch) 216, wherein latch cicuit 212 comprises two phase inverters (inverter) and connects into a feedback loop (feedback loop), in order to latch the position of the pixel value of being sent here by frame memory 102.Then, the position that amplifier 214 bufferings latch, export data bus 116 again to, wherein amplifier 214 has the first allocation index circuit 204, latch according to first allocation index, 106 controls, first impact damper 104, wherein the first allocation index circuit 204 can be according to first allocation index 106, the address of distributing the position of the pixel value that latchs, and the first allocation index circuit 204 is just like an impact damper, produce first allocation index 106 by central processing unit 114, via the first allocation index circuit 204, offer amplifier 214.
According to another embodiment of the present invention, by above-mentioned source electrode driver, the refresh frame storer.Please refer to Fig. 3, is a kind of process flow diagram of method of refresh frame storer.This method comprises: first latchs step 320, second latchs step 304, write step 306.Latch in the step 320 first, the position of latching the pixel value with first allocation index is by frame memory to the first impact damper, and wherein first switch determines first impact damper to latch the sequential of the position of pixel value, and the first allocation index circuit provides first allocation index.Latch in the step 304 second, latch the image with second allocation index pixel value the position by first impact damper to the second impact damper, wherein second allocation index is different from first allocation index, in like manner, second switch determine second impact damper latch image pixel value the position sequential, the second allocation index circuit provides second allocation index.
Then, second allocation index distributes the address of the position of pixel value in regular turn.In write step 306, the position of pixel value writes frame memory by second impact damper, reaches the purpose of turnup image.
Though the present invention discloses as above with a preferred embodiment; right its is not in order to limit the present invention; those skilled in the art can be used for a variety of modifications and variations under the prerequisite without departing from the spirit and scope of the present invention, so protection scope of the present invention is as the criterion with claim of the present invention.
Claims (19)
1. source electrode driver comprises at least:
One frame memory stores a plurality of position of a plurality of pixel values of an image;
One first impact damper latchs institute's rheme of the described pixel value that is transmitted by this frame memory in regular turn, and wherein said position has one first allocation index; And
One second impact damper latchs institute's rheme of the described pixel value that is transmitted by this first impact damper in regular turn, and wherein said position has one second allocation index, and then, the described place value of described pixel value writes this frame memory, by this turnup image.
2. source electrode driver as claimed in claim 1, wherein this first impact damper latchs institute's rheme of the described pixel value that is come by this frame memory, exports a digital/analog converter again to.
3. source electrode driver as claimed in claim 1, wherein a central processing unit produces this first allocation index and this second allocation index.
4. source electrode driver as claimed in claim 1, wherein this first impact damper comprises:
Institute's rheme of the described pixel value that one latch circuit latches is transmitted by this frame memory;
One amplifier amplifies institute's rheme of the described pixel value of this latch circuit latches; And
One first switch allows institute's rheme of the described pixel value of this latch circuit latches, and simultaneously, this frame memory enters reading state.
5. source electrode driver as claimed in claim 4, wherein this first impact damper also comprises one first allocation index circuit, and it is controlled this first impact damper according to this first allocation index and latchs.
6. source electrode driver as claimed in claim 4, wherein latch cicuit comprises two phase inverters and connects into a feedback loop.
7. source electrode driver as claimed in claim 4, wherein this first switch is a CMOS (Complementary Metal Oxide Semiconductor) switch.
8. source electrode driver as claimed in claim 1, wherein this second impact damper comprises:
One flip/flops latch is by institute's rheme of the next described pixel value of this first impact damper; And
One second switch allows institute's rheme of described pixel value to write this frame memory, and simultaneously, this frame memory enters write state.
9. source electrode driver as claimed in claim 8, wherein second impact damper also comprises one second allocation index circuit, and it is controlled this second impact damper according to this second allocation index and latchs.
10. source electrode driver as claimed in claim 8, wherein this second switch is a CMOS (Complementary Metal Oxide Semiconductor) switch.
11. source electrode driver as claimed in claim 1, wherein this image is by horizontal turnup.
12. the method for a refresh frame storer comprises the following step at least:
A plurality of positions of a plurality of pixel values are latching to one first impact damper by a frame memory, and wherein said position has one first allocation index;
Institute's rheme of described pixel value is latching to one second impact damper by this first impact damper, and wherein said position has one second allocation index, and this first allocation index is different from this second allocation index; And
The institute's rheme that writes described pixel value, is rolled by institute's rheme of described pixel value to this frame memory by this second impact damper, forms an image.
13. the method for refresh frame storer as claimed in claim 12, wherein latch in the step of institute's rheme of described pixel value with this first allocation index, institute's rheme of the described pixel value of one latch circuit latches, and an amplifier amplifies institute's rheme of described pixel value.
14. the method for refresh frame storer as claimed in claim 13, wherein a central processing unit provide this first allocation index via one first allocation index circuit to this amplifier.
15. the method for refresh frame storer as claimed in claim 12 wherein latchs in the step of institute's rheme of the described pixel value with this second allocation index institute's rheme of the described pixel value of a flip/flops latch.
16. the method for refresh frame storer as claimed in claim 15, wherein this central processing unit provide this second allocation index via one second allocation index circuit to this trigger.
17. the method for refresh frame storer as claimed in claim 12, wherein the sequential of institute's rheme of described pixel value is latched in the decision of one first switch by this frame memory.
18. the method for refresh frame storer as claimed in claim 12, wherein one second switch determines institute's rheme of described pixel value to write the sequential of this frame memory.
19. the method for refresh frame storer as claimed in claim 12, wherein this image is by horizontal turnup.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101532212A CN101399017B (en) | 2007-09-29 | 2007-09-29 | Source electrode driver with image scrolling function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101532212A CN101399017B (en) | 2007-09-29 | 2007-09-29 | Source electrode driver with image scrolling function |
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| Publication Number | Publication Date |
|---|---|
| CN101399017A CN101399017A (en) | 2009-04-01 |
| CN101399017B true CN101399017B (en) | 2010-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2007101532212A Expired - Fee Related CN101399017B (en) | 2007-09-29 | 2007-09-29 | Source electrode driver with image scrolling function |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106878196B (en) * | 2017-01-16 | 2021-02-05 | 许继集团有限公司 | Data processing method and device of ADC plug-in |
| CN109102770B (en) * | 2018-08-23 | 2019-12-27 | 上海深实微系统科技有限公司 | Low-power-consumption low-bandwidth display panel driving chip for high-performance calculation |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5579458A (en) * | 1990-11-13 | 1996-11-26 | Hitachi, Ltd. | Display control system for a scan type display apparatus |
| JP2003140636A (en) * | 2001-08-01 | 2003-05-16 | Stmicroelectronics Inc | Method and apparatus using two-dimensional circular data buffer for scrollable image display |
| CN1536401A (en) * | 2003-04-08 | 2004-10-13 | 索尼株式会社 | Display device |
-
2007
- 2007-09-29 CN CN2007101532212A patent/CN101399017B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5579458A (en) * | 1990-11-13 | 1996-11-26 | Hitachi, Ltd. | Display control system for a scan type display apparatus |
| JP2003140636A (en) * | 2001-08-01 | 2003-05-16 | Stmicroelectronics Inc | Method and apparatus using two-dimensional circular data buffer for scrollable image display |
| CN1536401A (en) * | 2003-04-08 | 2004-10-13 | 索尼株式会社 | Display device |
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| Publication number | Publication date |
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| CN101399017A (en) | 2009-04-01 |
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Granted publication date: 20100915 Termination date: 20180929 |