CN103345913A - Color time sequence liquid crystal on silicon (LCOS) display method, drive device and system thereof - Google Patents
Color time sequence liquid crystal on silicon (LCOS) display method, drive device and system thereof Download PDFInfo
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Abstract
The invention relates to a color time sequence liquid crystal on silicon (LCOS) display method. The method comprises the following steps of selecting two colors of data from red, blue and green data in input data and memorizing the data in a data register within each frame time, wherein combination modes of two colors of data selected from the red, blue and green data in the input data are different within continuous three-frame time; reading the two colors of data in the data register and memorizing the data in a high-speed register within each frame time; and reading the red, blue and green data in the high-speed register and transmitting the data to an external display screen within each frame time. In the color time sequence LCOS display method, only two colors of data are selected from the red, blue and green data in the input data and memorized in the data register, so that the data register only needs two channels, and the cost of the data register is reduced. In addition, the invention further provides a low-cost color time sequence LCOS display drive device and a system thereof.
Description
Technical field
The present invention relates to liquid crystal on silicon display technique field, particularly relate to a kind of colored sequential LCOS display packing, drive unit and system thereof.
Background technology
Colored sequential LCOS(Liquid Crystal on Silicon, the attached silicon of liquid crystal) advantage of display packing is not use chromatic color filter, than other display modes, colored sequential LCOS display packing can increase the utilization factor of LCDs, has better display effect.The principle of colored sequential LCOS display packing is: red in every two field picture at first, green, indigo plant (is R, G, B) three chromatic numbers are according to separating, then in the time of each frame successively with red, green, blue three chromatic numbers are according to writing display screen through storer, make display screen put azarin successively, green, the blue three color light source, thereby display screen shows red successively in the time of a frame, green, blue three chromatic numbers are according to the image of correspondence, because the visual persistence of human eye, in the blink of a frame, what human eye was seen is red, green, blue three chromatic numbers are according to the synthetic image of the image of correspondence, thereby have realized the purpose of color display.
Colored sequential LCOS shows and need store data, because data comprise red, green, blue three chromatic number certificates, present colored sequential LCOS display packing or device generally need the storer of three passages, three passages are deposited red, green, blue three chromatic number certificates respectively, obviously, the cost that expends of three passages is higher.
Summary of the invention
Based on this, be necessary to provide a kind of colored sequential LCOS display packing, drive unit and system thereof that can reduce cost.
A kind of colored sequential LCOS display packing comprises the steps:
In each frame time, from the red, green, blue three chromatic numbers certificate of input data, select two kinds of color data and be stored in data buffer, and in continuous three frame times, two kinds of color data array modes selecting from the red, green, blue three chromatic numbers certificate of input data are different in twos;
In each frame time, read two kinds of color data in the data buffer and be stored in Cache;
In each frame time, read the red, green, blue three chromatic numbers certificate in the Cache and transfer to exterior display screen.
Therein among embodiment, described red, green, blue three chromatic numbers from the input data according to select two kinds of color data and be stored in the step of data buffer before, comprise the steps:
To import data is equally divided into two parts and transfers to two data buffers respectively.
Therein among embodiment, described red, green, blue three chromatic numbers from the input data according to select two kinds of color data and be stored in the step of data buffer, in continuous three frame times, the array mode of two kinds of color data selecting from the red, green, blue three chromatic numbers certificate of input data is respectively: green, blue; Red, blue; Red, green.
Therein among embodiment, describedly will import the step that data are equally divided into two parts and transfer to two data buffers respectively and comprise:
Be that a fabric becomes the data group and transfers to data buffer with the data of input in the data with 16.
Therein among embodiment, described read two kinds of color data in the data buffer and be stored in Cache and read in the Cache red, green, blue three chromatic numbers according to and transfer in the step of exterior display screen, all adopted time division multiplex method transmission data.
A kind of colored sequential LCOS display drive apparatus, be used for connecting and driving display screen, comprise that 2 channel data buffers, data write control module, Cache and data and read control module, described data are write control module, 2 channel data buffers, Cache and data and are read control module and be connected in series successively;
In each frame time, described data are write control module and are selected two kinds of color data and transfer to described 2 channel data buffers from the red, green, blue three chromatic numbers certificate of outer input data, and two passages of described 2 channel data buffers are stored two kinds of color data respectively; Described 2 channel data buffers receive described data and write data that control module sends and data are stored; In each frame time, described Cache reads two kinds of color data and the storage in the 2 channel data buffers; In each frame time, described data are read control module and are read the red, green, blue three chromatic numbers certificate in the Cache and transfer to exterior display screen.
Therein among embodiment, described colored sequential LCOS display drive apparatus also comprises for the input data distribution module that outer input data is split into two groups of input data, described 2 channel data buffers, data are write control module and data and are read control module and be respectively two, described input data distribution module is connected to described two data and writes control module, and described two data are write control module and are respectively connected 2 channel data buffers, two 2 channel data buffers all are connected in described Cache, and two data are read control module and are connected to described Cache.
Among embodiment, described 2 channel data buffers are 2 channel data buffers of first-in first-out therein.
Among embodiment, described Cache is static RAM therein.
A kind of colored sequential LCOS display system, comprise that 2 channel data buffers, data write control module, Cache, data and read control module and display screen, described data are write control module, 2 channel data buffers, Cache, data read control module and display screen is connected in series successively;
In each frame time, described data are write control module and are selected two kinds of color data and transfer to described 2 channel data buffers from the red, green, blue three chromatic numbers certificate of outer input data, and two passages of described 2 channel data buffers are stored two kinds of color data respectively; Described 2 channel data buffers receive described data and write data that control module sends and data are stored; In each frame time, described Cache reads two kinds of color data and the storage in the 2 channel data buffers; In each frame time, described data are read control module and are read the red, green, blue three chromatic numbers certificate in the Cache and transfer to described display screen.
Above-mentioned colored sequential LCOS display packing, in each frame time, only select two kinds of color data and be stored in data buffer from the red, green, blue three chromatic numbers certificate of input data, therefore the data buffer that needs only needs 2 passages to get final product, and has reduced the cost of data buffer.Simultaneously, also provide a kind of colored sequential LCOS display drive apparatus and system thereof, the data buffer that described colored sequential LCOS display drive apparatus and system thereof use is 2 channel data buffers, and cost is lower.
Description of drawings
Fig. 1 is the process flow diagram of the colored sequential LCOS display packing of an embodiment;
Fig. 2 is the structural representation of the colored sequential LCOS display drive apparatus of an embodiment;
Fig. 3 is the structural representation of the colored sequential LCOS display system of an embodiment.
Embodiment
In order to solve present colored sequential LCOS display packing and to install required memory cost problem of higher, present embodiment provides a kind of colored sequential LCOS display packing, drive unit and system thereof.Below in conjunction with specific embodiment, colored sequential LCOS display packing, drive unit and system thereof are carried out concrete description.
Please refer to Fig. 1, the colored sequential LCOS display packing that present embodiment provides comprises the steps:
Step S110: in each frame time, from the red, green, blue three chromatic numbers certificate of input data, select two kinds of color data and be stored in data buffer.The data that are used for record color image generally comprise red, green, blue three chromatic number certificates, corresponding, the storer that is used for these three kinds of color data of storage just needs 3 passages, and each passage is used for depositing a kind of color data.But in this step, be not red, green, blue three chromatic numbers with the input data according to being stored in data buffer simultaneously, but from red, green, blue three chromatic numbers of input data according to select two kinds of color data to be stored in data buffer again.Obviously, adopt this method only to need 2 channel data buffers to get final product.Simultaneously, in continuous three frame times, two kinds of color data array modes selecting from the red, green, blue three chromatic numbers certificate of input data are different in twos, because red, green, blue three chromatic numbers can only obtain 3 kinds of array modes inequality according to combination in twos, therefore only need guarantee that the color combination of selecting in continuous three frame times has nothing in common with each other get final product, only need circulate according to the system of selection in this three frame in the time of subsequent frame.Such as, the array mode of two kinds of color data selecting in first frame time is green, blue; The array mode of two kinds of color data selecting in second frame time is red, blue; The array mode of two kinds of color data selecting in the 3rd frame time is red, green; The array mode of two kinds of color data selecting in the 4th frame time is identical with the array mode of the interior two kinds of color data selecting of first frame time, also is green, blue, the back and the like.
Step S120: in each frame time, read two kinds of color data in the data buffer and be stored in Cache.Be foundation with the example among the step S110, the data that read from data buffer in first frame time are green, blue color data; The data that read from data buffer in second frame time are red, blue color data; The data that read from data buffer in the 3rd frame time are red, green color data; The back and the like.Like this, per 3 frame times just can read two groups of complete red, green, blues, three chromatic number certificates from data buffer.
Handle the process of input data in order to further specify colored sequential LCOS display packing, please refer to following example:
If the input data are set { A1, A2, A3 ... An}, wherein, An represents the data of n color image frame, and data An comprises Rn, Bn and three subdatas of Gn again, and Rn, Bn and Gn represent three primary colours (red, blue, the green) color data that the n color image frame comprises respectively.So, two kinds of color data selecting in first frame time are G1, B1; Two kinds of color data selecting in second frame time are R1, B2; Two kinds of color data selecting in the 3rd frame time are R2, G2; Two kinds of color data selecting in the 4th frame time are G3, B3, and the like.Like this, in continuous 3 frame times, just can from data buffer, read two groups of complete red, green, blues, three chromatic number certificates.Such as in initial 3 frame times, obtaining G1, B1, R1 and G2, two groups of complete red, green, blues of B2, R2, three chromatic number certificates.
Step S130: in each frame time, read the red, green, blue three chromatic numbers certificate in the Cache and transfer to exterior display screen.Because in each frame time, only store the data of two kinds of colors in the data buffer, so in the Cache except have with data buffer in two kinds of color data of current storage, also have a kind of color data of previous frame time memory storage.Such as in the 4th frame time, the data that store in the data buffer this moment are G3, B3, and the data that can read in the Cache this moment are exactly G3, B3 and R2 so.Simultaneously, display screen demonstrates coloured image according to G3, B3 and R2, certainly, there is deviation in the image that shows according to G3, B3 and R2 with real image, actually should show image according to G3, B3 and R3, but because the time of a frame is very short, R2 will soon refresh and is R3, add that there are the characteristics of visual persistence in human eye, in fact this deviation can't be found out by human eye.In the present embodiment, three kinds of color data in the Cache are to adopt the time division multiplex method to be transferred to display screen.In actual applications, exactly a frame time is divided into 3 time slices, in each time slice, a kind of color data in the Cache is transferred to display screen.Like this, the image that human eye is seen in a frame time is the synthetic image that obtains of three kinds of color data that transmits in these 3 time slices, because time division multiplex method transmission data only need a data line, can reduce the cost of hardware.
In order further to improve the speed that colored sequential LCOS display packing is handled the input data, increase the refresh rate of display screen, before step S110, comprise the steps:
Step S100: will import data and be equally divided into two parts and transfer to two data buffers respectively.Like this, handle the input data simultaneously by two data buffers, data processing speed can be promoted about 1 times.
In addition, in the present embodiment, can be that a fabric becomes the data group and transfers to data buffer with 16 with the data in the input data, certainly, can be one group with 4 or 8 with the data in the input data also.Here simultaneously a plurality of data composition data group transmission can be improved data rate, certainly, specifically transmit the ability what data depend on actual hardware transmission data simultaneously.
Based on above-mentioned colored sequential LCOS display packing, we provide a kind of colored sequential LCOS display drive apparatus.Please refer to Fig. 2, the colored sequential LCOS display drive apparatus that present embodiment provides comprises that 2 channel data buffers 210, data write control module 220, Cache 230 and data and read control module 240.
Data are write control module 220,2 channel data buffers 210, Cache 230 and data and are read control module 240 and be connected in series successively.According to above-mentioned colored sequential LCOS display packing, in each frame time, data are write control module 220 and are selected two kinds of color data and transfer to 2 channel data buffers 210 from the red, green, blue three chromatic numbers certificate of outer input data.Two passages of 2 channel data buffers 210 are stored two kinds of color data respectively, and 2 channel data buffers reception data are write the data of control module 220 transmissions and data are stored.In each frame time, Cache 230 reads two kinds of color data and the storage in the 2 channel data buffers; In each frame time, data are read control module 240 and are read the red, green, blue three chromatic numbers certificate in the Cache and transfer to exterior display screen.
In order further to improve the speed that colored sequential LCOS display drive apparatus is handled the input data, the colored sequential LCOS display drive apparatus of present embodiment also comprises for the input data distribution module 250 that outer input data is split into two groups of input data.Since the input data are transfused to data distribution module 250 and have been divided into two parts, and are corresponding, 2 channel data buffers 210, data are write control module 220 and data and are read control module 240 and also need two respectively.2 channel data buffers 210 are first-in first-out (FIFO, First Input First Output) data buffer.Two data are write control module 220 and are respectively that strange row are write control module 222 and the idol row are write control module 224.Data input diffluence piece 250 is connected to that strange row are write control module 222 and the idol row are write control module 224, and strange row are write control module 222 and idol and are listed as and write control module 224 and respectively be connected 2 channel data buffers 210.Two 2 channel data buffers all are connected in Cache 230.Cache 230 is static RAM (SRAM, Static Random Access Memory).Two data are read control module 240 and are respectively that strange row are read control module 242 and the idol row are read control module 244, and strange row are read control module 242 and idol row and read control module 244 and all be connected in static RAM.
The method of specifically handling the input data about colored sequential LCOS display drive apparatus is consistent with the statement in the above-mentioned colored sequential LCOS display packing, does not repeat them here.
In addition, present embodiment also provides a kind of colored sequential LCOS display system.Please refer to Fig. 3, read control module 240 in the data of above-mentioned colored sequential LCOS display drive apparatus connects display screen 260 to colored sequential LCOS display system in fact exactly.In the present embodiment, data are read control module 240 and are comprised that strange row are read control module 242 and the idol row are read control module 244.Strange row are read control module 242 and idol row and are read control module 244 and be connected to display screen 260, and under the control, display screen 260 can demonstrate the coloured image of expection when strange row are read control module 242 and idol row to read control module 244.
Above-mentioned colored sequential LCOS display packing, drive unit and system, in each frame time, from the red, green, blue three chromatic numbers certificate of input data, only select two kinds of color data and be stored in data buffer, therefore the data buffer that needs only needs 2 passages to get final product, and has reduced the cost of data buffer.Simultaneously, also provide a kind of colored sequential LCOS display drive apparatus and system thereof, the data buffer that described colored sequential LCOS display drive apparatus and system thereof use is 2 channel data buffers, and cost is lower.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a colored sequential LCOS display packing comprises the steps:
In each frame time, from the red, green, blue three chromatic numbers certificate of input data, select two kinds of color data and be stored in data buffer, and in continuous three frame times, two kinds of color data array modes selecting from the red, green, blue three chromatic numbers certificate of input data are different in twos;
In each frame time, read two kinds of color data in the data buffer and be stored in Cache;
In each frame time, read the red, green, blue three chromatic numbers certificate in the Cache and transfer to exterior display screen.
2. colored sequential LCOS display packing according to claim 1 is characterized in that, described red, green, blue three chromatic numbers from the input data according to select two kinds of color data and be stored in the step of data buffer before, comprise the steps:
To import data is equally divided into two parts and transfers to two data buffers respectively.
3. colored sequential LCOS display packing according to claim 1 and 2, it is characterized in that, described red, green, blue three chromatic numbers from the input data according to select two kinds of color data and be stored in the step of data buffer, in continuous three frame times, the array mode of two kinds of color data selecting from the red, green, blue three chromatic numbers certificate of input data is respectively: green, blue; Red, blue; Red, green.
4. colored sequential LCOS display packing according to claim 2 is characterized in that, describedly will import the step that data are equally divided into two parts and transfer to two data buffers respectively and comprise:
Be that a fabric becomes the data group and transfers to data buffer with the data of input in the data with 16.
5. colored sequential LCOS display packing according to claim 1, it is characterized in that, described read two kinds of color data in the data buffer and be stored in Cache and read in the Cache red, green, blue three chromatic numbers according to and transfer in the step of exterior display screen, all adopted time division multiplex method transmission data.
6. colored sequential LCOS display drive apparatus, be used for connecting and driving display screen, it is characterized in that, comprise that 2 channel data buffers, data write control module, Cache and data and read control module, described data are write control module, 2 channel data buffers, Cache and data and are read control module and be connected in series successively;
In each frame time, described data are write control module and are selected two kinds of color data and transfer to described 2 channel data buffers from the red, green, blue three chromatic numbers certificate of outer input data, and two passages of described 2 channel data buffers are stored two kinds of color data respectively; Described 2 channel data buffers receive described data and write data that control module sends and data are stored; In each frame time, described Cache reads two kinds of color data and the storage in the 2 channel data buffers; In each frame time, described data are read control module and are read the red, green, blue three chromatic numbers certificate in the Cache and transfer to exterior display screen.
7. colored sequential LCOS display drive apparatus according to claim 6, it is characterized in that, described colored sequential LCOS display drive apparatus also comprises for the input data distribution module that outer input data is split into two groups of input data, described 2 channel data buffers, data are write control module and data and are read control module and be respectively two, described input data distribution module is connected to described two data and writes control module, and described two data are write control module and are respectively connected 2 channel data buffers, two 2 channel data buffers all are connected in described Cache, and two data are read control module and are connected to described Cache.
8. colored sequential LCOS display drive apparatus according to claim 6 is characterized in that, described 2 channel data buffers are 2 channel data buffers of first-in first-out.
9. colored sequential LCOS display drive apparatus according to claim 6 is characterized in that, described Cache is static RAM.
10. colored sequential LCOS display system, it is characterized in that, comprise that 2 channel data buffers, data write control module, Cache, data and read control module and display screen, described data are write control module, 2 channel data buffers, Cache, data read control module and display screen is connected in series successively;
In each frame time, described data are write control module and are selected two kinds of color data and transfer to described 2 channel data buffers from the red, green, blue three chromatic numbers certificate of outer input data, and two passages of described 2 channel data buffers are stored two kinds of color data respectively; Described 2 channel data buffers receive described data and write data that control module sends and data are stored; In each frame time, described Cache reads two kinds of color data and the storage in the 2 channel data buffers; In each frame time, described data are read control module and are read the red, green, blue three chromatic numbers certificate in the Cache and transfer to described display screen.
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