CN202126820U - Field sequence display - Google Patents
Field sequence display Download PDFInfo
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- CN202126820U CN202126820U CN2011201171907U CN201120117190U CN202126820U CN 202126820 U CN202126820 U CN 202126820U CN 2011201171907 U CN2011201171907 U CN 2011201171907U CN 201120117190 U CN201120117190 U CN 201120117190U CN 202126820 U CN202126820 U CN 202126820U
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- sequence display
- field sequence
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Abstract
The utility model provides a field sequence display which drives each display unit by way of over-voltage drive and comprises at least one storage space for storing an image content currently displayed by each display unit and primary frame display data in the process of over-voltage drive. The size of the storage space is minimally 4*X*Y storage units, wherein X is the number of pixels of width of the field sequence display and Y is the number of pixels of height of the field sequence display. By reasonable arrangement of storage space in the field sequence display, the utility model is able to save the storage space of the field sequence display so as to reduce the cost without influencing the performance of the field sequence display.
Description
Technical field
The utility model relates to a kind of display device, and especially LCD particularly, relates to a sequence display (Color Sequential Display), and it has a characteristic of sequence display storage space of saving.
Background technology
The field sequence shows that (Color Sequential Display) is a kind of display technique of using the red, green, blue hybrid backlight to replace constant white backlight.
In existing display, there is a back light unit that uses white light source the array back at a Thin Film Transistor-LCD (TFT LCD).In the front of LCD array, the pattern matrix of a red, green, blue is arranged, it is called as color optical filtering (color filter) (as shown in Figure 1).When white light source passed the color optical filtering, people's naked eyes were because the effect of color optical filtering can be seen colored picture.
Yet human naked eyes have an equalization effect (averaging effect) for the image that is observed.For example, when a light source in the flash of light of 60 hertz frequency, it is in flash of light that naked eyes can't be perceived it, but sees a constant image.Based on such principle, in a field sequence display, TFT LCD array is used the single white backlight (as shown in Figure 2) of red, green, blue replacement backlight at the back.Like this, a sequence display just no longer needs the color optical filtering, the substitute is RGB flash of light sequentially backlight.In the time of an appointment, has only a kind of look light yellow backlight.As long as these colored backlights flash enough soon, naked eyes can't be found flash of light, but see a constant image.Such display is called as a sequence display.The field sequence display is compared with display technique before, can save cost on the one hand, also is convenient to control shows signal on the other hand.
It does not need the color optical filtering in the sequence display on the scene, and the color optical filtering is expensive component in whole LCD display.Yet such cost is, a sequence display operation need be three times in the time of original white light LCD display at least because red, green, blue backlight be sequence starting one by one.In order to accelerate such process, LCD needs a kind of liquid crystal that can start fast.
Present liquid crystal is all quick inadequately usually.This just needs a kind of actuation techniques that is called as overvoltage drive (overdrive) to accelerate the toggle speed of liquid crystal.In overvoltage drive, use a higher voltage to liquid crystal usually, thereby liquid crystal can be started faster.The display timing generator figure of field sequence display can be with reference to figure 3.At first, a common display image is divided into three sub-frame (sub-frame): red group, green group and blue group.In each is organized basically, drive sequential and also be subdivided into three pieces: overvoltage drive (overdrive), conventional driving (normal drive) and flash of light backlight (B-light ON or G-light ON or R-light ON).
In overvoltage drive, the extra voltage that is loaded is by previous image state and the decision of current images state.Promptly decide the voltage of said overvoltage drive according to first pixel of the image of last pixel and present frame in the image of previous frame.So in a common lcd driver chip (drive IC), these two image states all need be preserved.In order to preserve these states, such driving wafer need double the storage space of common lcd driver chip.This can increase the cost of lcd driver chip undoubtedly.
In order to save the storage space of lcd driver chip, part technician has proposed some solutions, but these methods all do not solve the problem of saving storage space well.Article " A display image compression algorithm to reduce a frame memory of LCD driver " (author: Yukari Katayama, Yoshiki Kurokawa, Yusuke Uchida for example; Akihito Akai, Yasuyuki Kudo, Naruhiko Kasai (Hitachi); Hideaki Nagasawa, Kazuki Homma (Renesas SP Drivers), IEICE Tech. Rep.; Vol. 109, no. 146, EID2009-14; Pp. 9-12; July 2009.), " Adaptive Multi-level Block Truncation Coding for Frame Memory Reduction in LCD Overdrive " (author: Jun Wang, Jong-Wha Chong, IEEE Transactions on Consumer Eletronics; 56 (2): May, 2010) solution was once proposed.
Summary of the invention
To defective of the prior art, the purpose of the utility model provides a kind of field sequence display of saving storage space.
An aspect according to the utility model; A kind of sequence display is provided, and it drives each display unit through pressing the mode that drives, and it comprises at least one storage space; Said storage space is used to store current institute images displayed content of each display unit described in the overvoltage drive process and previous frame video data; It is characterized in that the size minimum of said storage space is: 4 * X * Y storage unit, wherein; Said X is the wide number of pixels of said sequence display, and said Y is the high number of pixels of said sequence display.
Preferably, the space size of 1 * X in the said storage space * Y storage unit corresponds respectively to said each display unit, and is used for storing the content of last 1 storage unit of previous frame video data.
Preferably, the space size that remains 3 * X * Y storage unit in the said storage space corresponds respectively to said each display unit, and is used to store current institute images displayed content.
Preferably, a said storage unit is a dot matrix.
The utility model can be saved the storage space of a sequence display through the reasonable arrangement to storage space in the sequence display of field, thereby the field sequence display cost that makes the utility model provide is lower, but does not influence the performance of a sequence display.
Description of drawings
Through reading the detailed description of non-limiting example being done with reference to following accompanying drawing, it is more obvious that the other features, objects and advantages of the utility model will become:
Fig. 1 illustrates the displaying principle synoptic diagram of traditional Thin Film Transistor-LCD;
Fig. 2 illustrates the principle schematic of the field sequence display that does not adopt the color optical filtering in the prior art;
Fig. 3 illustrates the sequential synoptic diagram of three sub-frame of a sequence display; And
Fig. 4 illustrates the principle schematic of the storage space that is used to store video data in the field sequence display that the utility model provides.
Embodiment
It will be appreciated by those skilled in the art that above-mentioned Fig. 1 to Fig. 3 shows some aspect of prior art respectively.Particularly, Fig. 1 illustrates the displaying principle synoptic diagram of traditional Thin Film Transistor-LCD, wherein, in the front of LCD array, the pattern matrix of a red, green, blue is arranged, and it is called as color optical filtering (color filter) (as shown in Figure 1).When white light source passed the color optical filtering, people's naked eyes were because the effect of color optical filtering can be seen colored picture.Fig. 2 illustrates the principle schematic of the field sequence display that does not adopt the color optical filtering in the prior art, and wherein, in a field sequence display, TFT LCD array is used the single white backlight of red, green, blue replacement backlight at the back.Like this, a sequence display just no longer needs the color optical filtering, the substitute is RGB flash of light sequentially backlight.In the time of an appointment, has only a kind of look light yellow backlight.As long as these colored backlights flash enough soon, naked eyes can't be found flash of light, but see a constant image.Fig. 3 illustrates the sequential synoptic diagram of three sub-frame of a sequence display, and wherein, a common display image is divided into three sub-frame (sub-frame): red group, green group and blue group.In each is organized basically, drive sequential and be subdivided into three pieces yet: overvoltage drive (overdrive), conventional driving (normal drive) and flash of light backlight (B-light ON or G-light ON or R-light ON) do not repeat them here.
Fig. 4 illustrates the principle schematic of the storage space that is used to store video data in the field sequence display that the utility model provides.Particularly, from seeing in logic, said storage space is divided into four parts; Be respectively 3A as shown in Figure 4,3B, 3C, 3D, and from physically seeing, then these four storage spaces can be joined together; And the position of the video data of being stored can be confirmed according to special algorithm; For example from see that in logic continuous data can separate on physical space, the flesh and blood that this does not influence the utility model does not repeat them here.
In the present embodiment, the size that it will be appreciated by those skilled in the art that said storage space 3A, 3B, 3C and 3D equates.Particularly; After the demonstration of previous frame displaying contents finishes; The display control unit of said sequence display reads the present frame displaying contents in said storage space, promptly read the present frame displaying contents in three storage areas from said storage space 3A, 3B, 3C and 3D.For example, preferably, be example with example shown in Figure 4; Our hypothesis is in the previous frame procedure for displaying, and the storage space that is used to store the previous frame video data is respectively SA, SB, SC, wherein; The storage space of last 1 storage unit is SA in the storage previous frame video data, and then in the present frame procedure for displaying, the content in the said storage space S A is retained; And storage space S B, SC are used to store the present frame video data, and storage space S D also is used to store the present frame video data simultaneously.Like this; When handling the present frame video data; In cycle shown in Figure 41 just; Above-mentioned display control unit at first reads previous frame video data pointer corresponding memory space, i.e. storage space S A, thus obtain the data of last 1 storage unit in the previous frame video data; Data (we are stored in the storage space S D at hypothesis) with the 1st storage unit in these data and the present frame video data compare then, thereby calculate the needed voltage of said overvoltage drive shown in Figure 3.And then said display control unit is controlled said grid stage drive circuit provides said overvoltage drive needed voltage, accomplishes the process of overvoltage drive in the drive cycle shown in Figure 3.
Similarly, in the cycle 2, said previous frame video data pointed storage space S B, promptly in the cycle 1, the data of last 1 storage unit of said present frame video data are stored in the said storage space S B.It will be apparent to those skilled in the art that; The process of data of confirming last 1 storage unit of said present frame video data through pointer can be with reference to existing techniques in realizing; For example at least can be with reference to " data structure C language version " (Yan Weimin, Wu Weimin work; Publishing house of Tsing-Hua University), do not repeat them here.Correspondingly; In the above-mentioned cycle 1, after said display control unit had read said present frame video data, then this display control unit write the next frame video data again in storage space; This next frame video data is the present frame video data in cycle 2, does not repeat them here.
Similarly, in the cycle 3, said previous frame video data pointed storage space S C, and in the cycle 4, said previous frame video data pointed storage space S D, and then repeat, do not repeat them here.
It will be apparent to those skilled in the art that; Because a display unit needs the data of 3 storage unit in current procedure for displaying; Add last 1 storage unit of the above-mentioned previous frame video data that is used for definite driving voltage; So, to the storage space of 4 storage unit of display unit needs.Suppose that the wide of said sequence display is the X pixel, the height of said sequence display is the Y pixel, the technical scheme that then provides through the utility model, and a field sequence display needs the storage space of 4 * X * Y storage unit at least.
With reference to the foregoing description, variant and corresponding accompanying drawing, it will be appreciated by those skilled in the art that the gray scale requirement of the pixel that depends on above-mentioned display unit further, the size of said storage unit can be different.For example, preferably, the size of a said storage unit can be a dot matrix (dot), for example is 6 (bit) or 8 (bit), and this specifically depends on the needs of enforcement, does not influence the flesh and blood of the utility model.Further; It will be appreciated by those skilled in the art that if the needed order of magnitude of the pairing video data of display unit is not above-mentioned " bit " unit, but other units of quantity; For example " byte "; The storage space that the field sequence that then correspondingly the utility model provided shows is at least 4 * X * Y " unit of quantity ", and the flesh and blood that this does not influence the utility model does not repeat them here.
Further, it will be appreciated by those skilled in the art that the utility model provides a kind of method that a sequence display drives the required extra storage space of wafer that applies to reduce.When show one wide be X pixel, high when being the image of Y pixel, traditional display driver wafer needs X*Y*3 storage unit to be used to store this width of cloth image.These 3 data that storage unit is used to store red, green, blue.
In a traditional field sequence display driver wafer, previous view data and present view data all need be preserved.That is exactly 6*X*Y storage unit altogether.One of shortcoming of Here it is sequence display.The storage space of twice has increased system cost altogether, thereby has reduced through omitting the cost that the color optical filtering is practiced thrift.
In the utility model, we notice that the RGB view data is sequentially changing.In the view data formerly, has only blue image data to showing that present image plays a key effect.So we only need to preserve previous blue image data.Use such method, always the data of total 4*X*Y storage unit need storage.So just can save 33% storage space.Particularly, it will be appreciated by those skilled in the art that the practical implementation that is directed against the foregoing description; And the situation in corresponding saving space, articles of reference " A display image compression algorithm to reduce a frame memory of LCD driver " (author: Yukari Katayama, Yoshiki Kurokawa at least; Yusuke Uchida, Akihito Akai, Yasuyuki Kudo; Naruhiko Kasai (Hitachi), Hideaki Nagasawa, Kazuki Homma (Renesas SP Drivers); IEICE Tech. Rep., vol. 109, and no. 146; EID2009-14, pp. 9-12, July 2009.), " Adaptive Multi-level Block Truncation Coding for Frame Memory Reduction in LCD Overdrive " (author: Jun Wang; Jong-Wha Chong, IEEE Transactions on Consumer Eletronics, 56 (2): May; 2010) realize, do not repeat them here.
In the sequence display on the scene, backlight possibly not be to flash with the order of RGB.Owing to increase the needs of display quality, RGB, turquoise red, perhaps blue red green such order also possibly be used.Yet the memory mechanism of the utility model goes for any color order.Have only the last color meeting in group of the image of previous broadcast to be preserved.Storage space altogether is 4*X*Y storage unit always, and can not change because of the variation of color order.
More than the specific embodiment of the utility model is described.It will be appreciated that the utility model is not limited to above-mentioned specific implementations, those skilled in the art can make various distortion or modification within the scope of the claims, and this does not influence the flesh and blood of the utility model.
Claims (4)
1. field sequence display; It drives each display unit through pressing the mode that drives; It comprises at least one storage space; Said storage space is used to store current institute images displayed content of each display unit described in the overvoltage drive process and previous frame video data, it is characterized in that, the size minimum of said storage space is:
4 * X * Y storage unit, wherein, said X is the wide number of pixels of said sequence display, said Y is the high number of pixels of said sequence display.
2. according to claim 1 sequence display; It is characterized in that; The space size of 1 * X in the said storage space * Y storage unit corresponds respectively to said each display unit, and is used for storing the content of last 1 storage unit of previous frame video data.
3. according to claim 2 sequence display is characterized in that the space size that remains 3 * X * Y storage unit in the said storage space corresponds respectively to said each display unit, and is used to store current institute images displayed content.
4. according to each described sequence display in the claim 1 to 3, it is characterized in that a said storage unit is a dot matrix.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201171907U CN202126820U (en) | 2011-04-20 | 2011-04-20 | Field sequence display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201171907U CN202126820U (en) | 2011-04-20 | 2011-04-20 | Field sequence display |
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| CN202126820U true CN202126820U (en) | 2012-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011201171907U Expired - Lifetime CN202126820U (en) | 2011-04-20 | 2011-04-20 | Field sequence display |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102750915A (en) * | 2011-04-20 | 2012-10-24 | 新相微电子(上海)有限公司 | Field sequence display and corresponding control method for saving storage spaces |
| CN107016975A (en) * | 2017-05-12 | 2017-08-04 | 惠科股份有限公司 | The display device that overvoltage drive device and its storage method are applied with it |
-
2011
- 2011-04-20 CN CN2011201171907U patent/CN202126820U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102750915A (en) * | 2011-04-20 | 2012-10-24 | 新相微电子(上海)有限公司 | Field sequence display and corresponding control method for saving storage spaces |
| CN107016975A (en) * | 2017-05-12 | 2017-08-04 | 惠科股份有限公司 | The display device that overvoltage drive device and its storage method are applied with it |
| CN107016975B (en) * | 2017-05-12 | 2018-09-25 | 惠科股份有限公司 | Overvoltage drive device and its display equipment of application |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120125 |
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| CX01 | Expiry of patent term |