CN103442187A - Method for driving liquid-crystal-on-silicon display screen - Google Patents
Method for driving liquid-crystal-on-silicon display screen Download PDFInfo
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- CN103442187A CN103442187A CN2013103862299A CN201310386229A CN103442187A CN 103442187 A CN103442187 A CN 103442187A CN 2013103862299 A CN2013103862299 A CN 2013103862299A CN 201310386229 A CN201310386229 A CN 201310386229A CN 103442187 A CN103442187 A CN 103442187A
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Abstract
The invention discloses a method for driving a liquid-crystal-on-silicon display screen. The method for driving the liquid-crystal-on-silicon display screen converts external video signals into serial video digital signals matched with the interface of an SSD1961 chip, the serial video digital signals are converted into corresponding parallel video digital signals through the SSD1961 chip, and the liquid-crystal-on-silicon display screen is driven according to the parallel video digital signals. The method for driving the liquid-crystal-on-silicon display screen achieves the fact that the liquid-crystal-on-silicon display screen can be driven by the external video signals of different types, convenience is achieved, and the butt joint between digital signals is perfected.
Description
Technical field
The present invention relates to silicon-based liquid crystal display screen Driving technique field, particularly relate to a kind of silicon-based liquid crystal display screen driving method.
Background technology
Liquid crystal on silicon (Liquid Crystal on Silicon, LCOS) is a kind of based on reflective-mode, the matrix liquid crystal display device that size is very little.This matrix adopts CMOS technology processing and fabricating on silicon to form.
For the characteristics of LCOS screen, when being driven, the LCOS screen need to use parallel rgb video digital signal to be driven.The vision signal that traditional digital video signal is the MCU8080 pattern is 8 digital video signals of serial.
When the LCOS screen is driven, vision signal for the different-format of inputting selects different drive units to be driven, docking between digital signal is improved not and need to select drive unit when the digital video signal of input different-format, cumbersome.
Summary of the invention
Based on this, necessary perfect not for the digital signal docking, for the vision signal of different-format, need to select the different driving device to cause cumbersome problem, a kind of silicon-based liquid crystal display screen driving method that can improve the digital signal docking, be convenient to be driven is provided.
A kind of silicon-based liquid crystal display screen driving method, for driving silicon-based liquid crystal display screen, comprise the steps:
Outer video signal is converted to the serial video digital signal that the interface with the SSD1961 chip is complementary;
By described SSD1961 chip, described serial video digital signal is converted to corresponding parallel video digital signal;
Drive described silicon-based liquid crystal display screen according to described parallel video digital signal.
Therein in embodiment, the described step that outer video signal is converted to the serial video digital signal that the interface with the SSD1961 chip is complementary, specifically comprise the steps:
Receive described external video digital signal;
If described outer video signal is outside parallel video digital signal, described outside parallel video digital signal is converted to the serial video digital signal that the interface with described SSD1961 chip is complementary; If described outer video signal is the external series video signal, by described SSD1961 chip, described external series video signal is converted to corresponding parallel video digital signal.
Therein in embodiment, the serial video digital signal of the serial video digital signal that described and the interface SSD1961 chip are complementary for being complementary with serial 8080 interfaces.
Therein in embodiment, if described outer video signal is external series digital video video, before described external series video signal is converted to the step of corresponding parallel video digital signal, also comprise the step that described external series video signal is selected, specifically comprise the steps:
Judge that whether described external series video signal is the serial video digital signal be complementary with described serial 8080 interfaces, if so, is converted to corresponding parallel video digital signal by described SSD1961 chip by described serial video digital signal;
Otherwise after described external series video signal is converted to the serial video digital signal that described and serial 8080 interfaces are complementary, then by described SSD1961 chip, described serial video digital signal is converted to corresponding parallel video digital signal.
In embodiment, the step that the described serial video digital signal that will be complementary with the interface of SSD1961 chip is converted to corresponding parallel video digital signal is therein:
The serial video digital signal that will be complementary with the interface of described SSD1961 chip is converted to the RGB parallel video digital signal that the resolution of high frame frequency is 640*480*18bit.
Therein in embodiment, describedly according to the parallel video digital signal, drive the step of described silicon-based liquid crystal display screen specifically to comprise the steps:
The RGB parallel video digital signal that is 640*480*18bit to the resolution of described high frame frequency is carried out the selection of R subfield, G subfield and B subfield, and exports according to the rotation of R subfield, R subfield, G subfield, G subfield, B subfield, B subfield the video signal that each subfield resolution is 640*480*6bit;
The video signal that is 640*480*6bit to described resolution carries out the signal convergent-divergent, exports the video signal that each subfield resolution is 480*480*6bit;
The video signal that is 480*480*6bit to described resolution carries out the Pixel arrangement conversion, exports the video signal that each subfield resolution is 320*240*18bit;
The video signal that is 320*240*18bit according to described each subfield resolution produces liquid crystal on silicon and drives sequential, drives described silicon-based liquid crystal display screen.
In embodiment, the RGB parallel video digital signal that the described resolution to described high frame frequency is 640*480*18bit is carried out the step of the selection of R subfield, G subfield and B subfield and is carried out the selection of R subfield, G subfield and B subfield for the field signal by described SSD1961 chip output therein.
Therein in embodiment, the described video signal that is 320*240*18bit according to described each subfield resolution produces liquid crystal on silicon and drives sequential, drives the step of described silicon-based liquid crystal display screen specifically to comprise the steps:
Produce the valid data gating signal, the video signal that when described valid data gating signal is effective, described resolution is 320*240*18bit is effective;
Produce the pulse modulation width signal, described pulse modulation width signal comprises R, G, the B pulse modulation width control signal of controlling respectively described silicon-based liquid crystal display screen three chromolumes;
The video signal that is 320*240*18bit according to described each subfield resolution and described valid data gating signal, control the corresponding lamp of three coloured light machines of described silicon-based liquid crystal display screen and light by described pulse modulation width signal.
Therein in embodiment, describedly control by the pulse modulation width signal step that the corresponding lamp of three coloured light machines of described silicon-based liquid crystal display screen lights and light the corresponding lamp of three coloured light machines for by described pulse modulation width signal, controlling the identical subfield video data signal of two continuous frames.
Therein in embodiment, before the described step that by the SSD1961 chip, described serial video digital signal is converted to corresponding parallel video digital signal, also comprise described SSD1961 chip is carried out to initialized step.
Above-mentioned silicon-based liquid crystal display screen driving method, outer video signal is converted to the serial video digital signal that the interface with the SSD1961 chip is complementary, by the SSD1961 chip, the serial video digital signal is converted to corresponding parallel video digital signal, then according to the parallel video digital signal, drives silicon-based liquid crystal display screen.Above-mentioned silicon-based liquid crystal display screen driving method, realized that dissimilar outer video signal all can drive silicon-based liquid crystal display screen, more convenient; And the docking between perfect digital signal.
The accompanying drawing explanation
The silicon-based liquid crystal display screen driving method flow chart that Fig. 1 is an embodiment;
Fig. 2 is step S120 flow chart embodiment illustrated in fig. 1;
Fig. 3 is step S160 flow chart embodiment illustrated in fig. 1;
Fig. 4 is subfield output timing diagram embodiment illustrated in fig. 3;
Fig. 5 is schematic diagram before R subfield Pixel arrangement conversion embodiment illustrated in fig. 4;
Fig. 6 is schematic diagram after R subfield Pixel arrangement conversion embodiment illustrated in fig. 5;
Fig. 7 is R subfield pixel cell schematic diagram embodiment illustrated in fig. 6;
Fig. 8 is step S168 flow chart embodiment illustrated in fig. 3;
Fig. 9 is that liquid crystal on silicon embodiment illustrated in fig. 8 drives sequential chart.
Embodiment
A kind of silicon-based liquid crystal display screen driving method, outer video signal is converted to the serial video digital signal that the interface with the SSD1961 chip is complementary, by the SSD1961 chip, above-mentioned serial video digital signal is converted to corresponding parallel video digital signal, and produces and drive sequential to drive silicon-based liquid crystal display screen by above-mentioned parallel video digital signal.By parallel video signal is carried out to a series of conversions, drive silicon-based liquid crystal display screen to be shown with the resolution of 320*240*18bit.This silicon-based liquid crystal display screen driving method, realized that dissimilar outer video signal all can drive silicon-based liquid crystal display screen, more convenient; And the docking between perfect digital signal.
Below in conjunction with drawings and Examples, a kind of silicon-based liquid crystal display screen driving method of the present invention is described in more detail.
Shown in Fig. 1, it is the silicon-based liquid crystal display screen driving method flow chart of an embodiment.With reference to figure 1, a kind of silicon-based liquid crystal display screen driving method, show for driving silicon-based liquid crystal display screen, specifically comprises the following steps:
Step S120: outer video signal is converted to the serial video digital signal that the interface with the SSD1961 chip is complementary.
Above-mentioned SSD1961 chip interface is serial 8080 interfaces, and therefore, the serial video digital signal be complementary with the SSD1961 chip interface is the MCU8080 interface video signal with serial 8080 Interface Matching.
Step S140: the serial video digital signal is converted to corresponding parallel video digital signal by the SSD1961 chip.Concrete, above-mentioned SSD1961 chip is converted to by the serial video digital signal RGB parallel video digital signal that the resolution of high frame frequency is 640*480*18bit.
Step S160: according to above-mentioned parallel video digital signal, drive silicon-based liquid crystal display screen.
Above-mentioned silicon-based liquid crystal display screen driving method, realized that dissimilar outer video signal all can drive silicon-based liquid crystal display screen, more convenient; And the docking between perfect digital signal.
Shown in Fig. 2, it is step S120 flow chart embodiment illustrated in fig. 1.
With reference to figure 2, above-mentioned steps S120 is converted to by outer video signal the serial video digital signal that the interface with the SSD1961 chip is complementary and specifically comprises the steps:
Step S122: receive the external video digital signal.Concrete, the said external video signal comprises external series video signal and outside parallel video digital signal.
Step S124: judge whether outer video signal is outside parallel video digital signal.If so, perform step S126, if not, perform step S128.
Step S126: if the said external vision signal is outside parallel video digital signal, the external video digital signal is converted to the serial video digital signal that the interface with the SSD1961 chip is complementary.
Concrete, said external parallel video digital signal is the RGB parallel video digital signal that resolution is 640*480*18bit.In other embodiment, said external parallel video digital signal also can be the RGB parallel video digital signal of other resolution.If changed by other chips, for example by the SSD1960 chip, to be changed, said external parallel video digital signal is the RGB parallel video digital signal that resolution is 320*240*18bit.
Step S128: if the said external vision signal is the external series video signal, further judge whether said external serial video digital signal is the serial video digital signal be complementary with the SSD1961 chip interface.If not, perform step S126, above-mentioned serial video digital signal is converted to the serial video digital signal that the interface with the SSD1961 chip is complementary; If so, perform step S140.
Concrete, above-mentioned SSD1961 chip interface is serial 8080 interfaces, if said external serial video digital signal and serial 8080 interfaces do not mate, be for example the serial video digital signal that serial 6800 interface modes are complementary, send to again the SSD1961 chip after above-mentioned serial video digital signal being converted to the serial video digital signal be complementary with serial 8080 interfaces.
Shown in Fig. 3, it is step S160 flow chart embodiment illustrated in fig. 1.
With reference to figure 3, above-mentioned steps S160 drives silicon-based liquid crystal display screen specifically to comprise the steps: according to institute's parallel video digital signal
Step S162: the RGB parallel video digital signal that is 640*480*18bit to the resolution of above-mentioned high frame frequency is carried out the selection of R subfield, G subfield and B subfield, and exports according to the rotation of R subfield, R subfield, G subfield, G subfield, B subfield, B subfield the video signal that each subfield resolution is 640*480*6bit.
In other embodiment, also can sequentially be exported according to other subfield output, be not limited to above-mentioned subfield output order.Rotation output video digital signal according to R subfield, R subfield, G subfield, G subfield, B subfield, B subfield, pulse width modulation (Pulse Width Modulation compared to the Sequential output vision signal according to R subfield, G subfield, B subfield, PWM) large, when silicon-based liquid crystal display screen is shown, picture disply is more stable; Can reduce simultaneously between R subfield, G subfield and each subfield of B subfield cause mix pornographic condition, can guarantee that the color of each subfield is purer, make the display effect of silicon-based liquid crystal display screen better.
Shown in Fig. 4, it is subfield output timing diagram embodiment illustrated in fig. 3.
With reference to figure 4, the field signal be chosen as according to the output of SSD1961 chip that the RGB parallel video digital signal that the above-mentioned resolution to high frame frequency is 640*480*18bit is carried out R subfield, G subfield and B subfield carries out the subfield selection.
Field signal VS high level is effective, when first high level, the video data of 640*480*18bit of input is only selected to the data of R subfield, exports so R subfield data bit 640*480*6bit(figure and does not show), lose the data of G subfield and B subfield; The same video data of selecting output R subfield when second high level; When the 3rd and the 4th high level, the video data of the 640*480*18bit of input is only selected to the data of G subfield, exports so G subfield data bit 640*480*6bit(figure and do not show), lose the data of R subfield and B subfield; When the 5th and the 6th high level, the video data of the 640*480*18bit of input is only selected to the data of B subfield, exports so B subfield data bit 640*480*6bit(figure and do not show), lose the data of R subfield and G subfield.
Step S164: the video signal that is 640*480*6bit to institute's resolution carries out the signal convergent-divergent, exports the video signal that each subfield resolution is 480*480*6bit.
Concrete, carry out the signal convergent-divergent to the capable convergent-divergent of video signal, can complete above-mentioned signal rows convergent-divergent by bilinearity algorithm or two cubes of algorithms.
Shown in Fig. 5, it is schematic diagram before R subfield Pixel arrangement conversion embodiment illustrated in fig. 4.
Shown in Fig. 6, it is schematic diagram after R subfield Pixel arrangement conversion embodiment illustrated in fig. 5.
Shown in Fig. 7, it is R subfield pixel cell schematic diagram embodiment illustrated in fig. 6.
Step S166: the video signal that is 480*480*6bit to institute's resolution carries out the Pixel arrangement conversion, exports the video signal that each subfield resolution is 320*240*18bit.
Shown in Fig. 5, the G subfield that its empty lattice representative is lost and the data of B subfield, when the video signal to the R subfield carries out the Pixel arrangement conversion, to lose the data of the G subfield of data and B subfield and delete, and the data of R subfield are rearranged and make there is no interval (with reference to figure 6) between every two cells that represent R subfield video data.With reference to figure 7, in R subfield after rearranging, the R1 of the R2 of the first row R1, the first row and the second row forms " Chinese character pin-shaped " pixel cell again, each cell is 6bit, so each pixel cell is 18bit, thereby obtain the video signal that R subfield resolution is 320*240*18bit.
Adopt identical method to carry out the Pixel arrangement conversion to the video signal of G subfield and B subfield, obtain respectively the video signal (not shown) that G subfield and B subfield resolution are 320*240*18bit.
Step S168: the video signal that is 320*240*18bit according to each subfield resolution produces liquid crystal on silicon and drives sequential, drives silicon-based liquid crystal display screen.
Shown in Fig. 8, it is the S168 of step shown in Fig. 3 flow chart.
Shown in Fig. 9, for liquid crystal on silicon embodiment illustrated in fig. 8 drives sequential chart.
With reference to figure 8, the video signal that above-mentioned steps S168 is 320*240*18bit according to each subfield resolution produces liquid crystal on silicon and drives sequential, drives silicon-based liquid crystal display screen specifically to comprise the steps:
Step S1682: produce the valid data gating signal.Above-mentioned valid data gating signal is DE signal (with reference to figure 9), and when the DE signal is effective, the video signal that each subfield resolution is 320*240*18bit accordingly is effective.
With reference to figure 9, adopt the frame alternating mode of R, R, G, G, B, B, the video data signal that each frame data comprises each subfield, every pixel that comprises 320*240*18bit.When above-mentioned valid data gating signal is effective, the video signal that above-mentioned each subfield resolution is 320*240*18bit is effective.
Step S1684: produce the pulse modulation width signal, the pulse modulation width signal comprises R, G, the B pulse modulation width control signal of controlling respectively silicon-based liquid crystal display screen three chromolumes.Above-mentioned three coloured light mechanisms become silicon-based liquid crystal display screen to show module, by controlling above-mentioned three coloured light machines, realize that silicon-based liquid crystal display screen is shown.
Step S1686: the video signal that is 320*240*18bit according to each subfield resolution and above-mentioned valid data gating signal, control the corresponding lamp of three coloured light machines of silicon-based liquid crystal display screen by the pulse modulation width signal and light.
The LED lamp that PWM_R, PWM_G, PWM_B control respectively R, G, the B of silicon-based liquid crystal display screen three coloured light machines is lighted and is effective when high level respectively.When PWM_R is high level, the red globe lamp in three coloured light machines is lighted; When PWM_G is high level, the green light lamp in three coloured light machines is lighted; When PWM_B is high level, the blue-ray light in three coloured light machines is lighted.
Concrete, the above-mentioned step of lighting by the corresponding lamp of three coloured light machines of pulse modulation width signal control silicon-based liquid crystal display screen is lighted the corresponding lamp of three coloured light machines for by the pulse modulation width signal, controlling the identical subfield video data signal of two continuous frames.
With reference to figure 9, the video data of every two frame R subfields is controlled the R lamp and is lighted, and the video data of the G subfield of every two frames is controlled the G lamp and lighted, and the B subfield Data Control B lamp of every two frames is lighted.Control corresponding lamp by the video data that every two frames are set and light, avoided mixing between adjacent R, G, B subfield the generation of pornographic condition, can guarantee that the color of each subfield is purer, make the display effect of silicon-based liquid crystal display screen 200 better.
Further, above-mentioned silicon-based liquid crystal display screen driving method, also comprise before by the SSD1961 chip, the serial video digital signal being converted to corresponding parallel video digital signal at step S140 the SSD1961 chip carried out to initialized step (not shown).By the SSD1961 chip is carried out to initialization, complete the initial configuration to the SSD1961 chip.
The above embodiment has only expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It 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 range of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a silicon-based liquid crystal display screen driving method, for driving silicon-based liquid crystal display screen, is characterized in that, comprises the steps:
Outer video signal is converted to the serial video digital signal that the interface with the SSD1961 chip is complementary;
By described SSD1961 chip, described serial video digital signal is converted to corresponding parallel video digital signal;
Drive described silicon-based liquid crystal display screen according to described parallel video digital signal.
2. silicon-based liquid crystal display screen driving method according to claim 1, is characterized in that, the described step that outer video signal is converted to the serial video digital signal that the interface with the SSD1961 chip is complementary, specifically comprise the steps:
Receive described external video digital signal;
If described outer video signal is outside parallel video digital signal, described outside parallel video digital signal is converted to the serial video digital signal that the interface with described SSD1961 chip is complementary; If described outer video signal is the external series video signal, by described SSD1961 chip, described external series video signal is converted to corresponding parallel video digital signal.
3. silicon-based liquid crystal display screen driving method according to claim 2, is characterized in that, the described serial video digital signal be complementary with the interface SSD1961 chip is the serial video digital signal be complementary with serial 8080 interfaces.
4. silicon-based liquid crystal display screen driving method according to claim 3, it is characterized in that, if described outer video signal is external series digital video video, before described external series video signal is converted to the step of corresponding parallel video digital signal, also comprise the step that described external series video signal is selected, specifically comprise the steps:
Judge that whether described external series video signal is the serial video digital signal be complementary with described serial 8080 interfaces, if so, is converted to corresponding parallel video digital signal by described SSD1961 chip by described serial video digital signal;
Otherwise after described external series video signal is converted to the serial video digital signal that described and serial 8080 interfaces are complementary, then by described SSD1961 chip, described serial video digital signal is converted to corresponding parallel video digital signal.
5. silicon-based liquid crystal display screen driving method according to claim 1, is characterized in that, the step that the described serial video digital signal that will be complementary with the interface of SSD1961 chip is converted to corresponding parallel video digital signal is:
The serial video digital signal that will be complementary with the interface of described SSD1961 chip is converted to the RGB parallel video digital signal that the resolution of high frame frequency is 640*480*18bit.
6. silicon-based liquid crystal display screen driving method according to claim 5, is characterized in that, describedly according to the parallel video digital signal, drives the step of described silicon-based liquid crystal display screen specifically to comprise the steps:
The RGB parallel video digital signal that is 640*480*18bit to the resolution of described high frame frequency is carried out the selection of R subfield, G subfield and B subfield, and exports according to the rotation of R subfield, R subfield, G subfield, G subfield, B subfield, B subfield the video signal that each subfield resolution is 640*480*6bit;
The video signal that is 640*480*6bit to described resolution carries out the signal convergent-divergent, exports the video signal that each subfield resolution is 480*480*6bit;
The video signal that is 480*480*6bit to described resolution carries out the Pixel arrangement conversion, exports the video signal that each subfield resolution is 320*240*18bit;
The video signal that is 320*240*18bit according to described each subfield resolution produces liquid crystal on silicon and drives sequential, drives described silicon-based liquid crystal display screen.
7. silicon-based liquid crystal display screen driving method according to claim 6, it is characterized in that, the RGB parallel video digital signal that the described resolution to described high frame frequency is 640*480*18bit is carried out the step of the selection of R subfield, G subfield and B subfield and is carried out the selection of R subfield, G subfield and B subfield for the field signal by described SSD1961 chip output.
8. silicon-based liquid crystal display screen driving method according to claim 6, it is characterized in that, the described video signal that is 320*240*18bit according to described each subfield resolution produces liquid crystal on silicon driving sequential, drives the step of described silicon-based liquid crystal display screen specifically to comprise the steps:
Produce the valid data gating signal, the video signal that when described valid data gating signal is effective, described resolution is 320*240*18bit is effective;
Produce the pulse modulation width signal, described pulse modulation width signal comprises R, G, the B pulse modulation width control signal of controlling respectively described silicon-based liquid crystal display screen three chromolumes;
The video signal that is 320*240*18bit according to described each subfield resolution and described valid data gating signal, control the corresponding lamp of three coloured light machines of described silicon-based liquid crystal display screen and light by described pulse modulation width signal.
9. silicon-based liquid crystal display screen driving method according to claim 8, it is characterized in that, describedly control by the pulse modulation width signal step that the corresponding lamp of three coloured light machines of described silicon-based liquid crystal display screen lights and light the corresponding lamp of three coloured light machines for by described pulse modulation width signal, controlling the identical subfield video data signal of two continuous frames.
10. silicon-based liquid crystal display screen driving method according to claim 1, it is characterized in that, before the described step that by the SSD1961 chip, described serial video digital signal is converted to corresponding parallel video digital signal, also comprise described SSD1961 chip is carried out to initialized step.
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| CN1475980A (en) * | 2002-06-26 | 2004-02-18 | �ձ������ȷ湫˾ | Display panel driver, display controlling apparatus, driving device and data transmission apparatus |
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