CN101567173B - Control scanning circuit of raster optical modulator projection device - Google Patents
Control scanning circuit of raster optical modulator projection device Download PDFInfo
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- CN101567173B CN101567173B CN2009101039544A CN200910103954A CN101567173B CN 101567173 B CN101567173 B CN 101567173B CN 2009101039544 A CN2009101039544 A CN 2009101039544A CN 200910103954 A CN200910103954 A CN 200910103954A CN 101567173 B CN101567173 B CN 101567173B
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Abstract
The invention provides a control scanning circuit of raster optical modulator projection device, which realizes high-resolution, high-definition projection display of the raster optical modulator. Thecontrol scanning circuit of raster optical modulator projection device is used for driving the pixel array composed of M row*N line optical modulators, comprising an active matrix drive circuit compo sed of M*N active matrix drive units, capable of controlling the pressure of the raster optical modulator to modulate the light based on the control signal and the image signal; a first driving circuit capable of receiving the control signal sent from the control device to gate the raster optical modulator on the same straight; and a second drive circuit capable of receiving the control signal andthe image signal sent from the control device to output the image data to the gated raster optical modulator.
Description
Technical field
The present invention relates to a kind of gated sweep circuit of display device, be specifically related to a kind of gated sweep circuit of grating light modulator.
Background technology
Publication number is that the Chinese invention patent ublic specification of application of CN1658009A discloses a kind of grating light modulator and array thereof, the processing of this grating light modulator is simple than DMD, has solved the shortcoming that GLV is difficult to formation face battle array simultaneously.For the Projection Display of facet battle array grating light modulator, utilize passive matrix to drive and to realize.But for the Projection Display of big face battle array grating light modulator, there is cross effect, is difficult to realize that high-quality image shows because passive matrix drives.And utilize the driven with active matrix grating light modulator, can make the positive true face of grating light modulator to high definition, high-resolution Projection Display.If peripheral drive circuit and active matrix separate packages, can increase each circuit module like this because the signal noise that interconnection line causes is disturbed, reduced the signal transmission rate of circuit system, and Projection Display for the grating light modulator of big face battle array, need draw thousands of input pin ports, these pins not only area occupied are big, increased cost, and having increased the complicacy that connects between the peripheral circuit module, these have all limited the Projection Display that grating light modulator is really realized high resolving power, high definition.
Publication number is the grating light modulator that the Chinese invention patent ublic specification of application of CN 101382655A discloses a kind of driven with active matrix, but is not used at present the gated sweep circuit of the projection arrangement that the grating light modulator of this driven with active matrix constitutes in the prior art.
Summary of the invention
In view of this, in order to address the above problem, the invention provides a kind of gated sweep circuit of raster optical modulator projection device, the projection arrangement that can constitute the grating light modulator of driven with active matrix drives, and realizes the Projection Display of high resolving power, high definition.
The object of the present invention is achieved like this: the gated sweep circuit of raster optical modulator projection device in order to drive the pel array that capable grating light modulator of M row * N formed, comprises
Active matrix driving circuit is made up of M * N driven with active matrix unit, and according to control signal and picture signal, the voltage of control grating light modulator is to realize the modulation to light;
The control signal that first driving circuit, receiving control device send is with the grating light modulator on the same straight line of gating; And
The control signal that second driving circuit, receiving control device send is closed picture signal, view data is outputed to the grating light modulator of gating.
Further, described first driving circuit is a horizontal drive circuit, and second driving circuit is a column drive circuit;
Further, described horizontal drive circuit comprises first shift-register circuit of the N position that connects successively, the gating circuit that a N gating element is formed, the circuit that a N level shifter is formed, described first shift register is used for the control signal of receiving control device and outputs to gating circuit, the N of a described gating circuit output terminal is connected one by one with the input end of N level shifter respectively, outputs to the capable gating signal control end of active matrix driving circuit after the voltage amplification of level shifter with gating circuit output;
Further, described gating element is and door;
Further, described column drive circuit comprises second shift-register circuit of the M position that connects successively, latch circuit and M circuit that level shifter is formed of M position, described second shift-register circuit is in order to the picture signal of receiving control device, and output in the latch circuit and preserve, under the control of the latch clock control signal that control device sends, picture signal is outputed to the column data input end of active matrix driving circuit by level shifter;
Further, active matrix driving circuit, first driving circuit, the second driving circuit monolithic are integrated;
Further, described driven with active matrix unit comprises first metal-oxide-semiconductor and an electric capacity, the grid of described first metal-oxide-semiconductor is electrically connected with the output terminal of first driving circuit, the drain electrode of first metal-oxide-semiconductor is electrically connected with second driving circuit, the source electrode of first metal-oxide-semiconductor is electrically connected with an end of electric capacity, the other end ground connection of described electric capacity, the source electrode of described first metal-oxide-semiconductor also are used for being connected with the bottom electrode of grating light modulator;
Further, described driven with active matrix unit comprises second metal-oxide-semiconductor and two phase inverters, the grid of described second metal-oxide-semiconductor is electrically connected with the output terminal of first driving circuit, the drain electrode of second metal-oxide-semiconductor is electrically connected with second driving circuit, described two inverter group become to be connected into ring circuit, the described input end that is connected into ring circuit is electrically connected with the source electrode of second metal-oxide-semiconductor, and the output terminal that is connected into ring circuit is used for being connected with the bottom electrode of grating light modulator.
The gated sweep circuit of raster optical modulator projection device of the present invention, can drive raster optical modulator projection device, eliminate passive matrix and drive intrinsic cross effect, improve contrast, resolution, dutycycle, make display characteristic towards high-resolution, high resolving power projection display technique.The grating light modulator of driven with active matrix reduces the requirement of grating light modulator dynamic corresponding time, can obtain abundant more gray scale color modulation.
Other advantages of the present invention, target, to set forth in the following description to a certain extent with feature, and to a certain extent,, perhaps can obtain instruction from the practice of the present invention based on being conspicuous to those skilled in the art to investigating hereinafter.Target of the present invention and other advantages can be passed through following instructions, claims, and the specifically noted structure realizes and obtains in the accompanying drawing.
Description of drawings
In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing:
Fig. 1 shows the gated sweep circuit theory synoptic diagram of raster optical modulator projection device;
Fig. 2 shows the electrical block diagram based on the active driver element of DRAM;
Fig. 3 shows the electrical block diagram based on the active driver element of SRAM;
Fig. 4 shows the electrical block diagram of level shifter.
Embodiment
Hereinafter with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail.
Referring to Fig. 1, the gated sweep circuit of raster optical modulator projection device, in order to drive the pel array that capable grating light modulator of M row * N formed, now the gated sweep circuit with 1920 * 1080 resolution raster optical modulator projection devices is that example describes, and this resolution raster optical modulator projection device has the pel array that 1920 row * 1080 a row grating light modulator are formed.
The gated sweep circuit of described raster optical modulator projection device is by active matrix driving circuit 1, horizontal drive circuit 2, the encapsulation of column drive circuit 3 monolithics forms, just can realize control by several Control signal and data bus to active matrix, thereby realize the grating light modulator high definition, high-resolution Projection Display, reduce the signal noise interference that different circuit module interconnection lines cause, improve the transfer rate of circuit system, reduced the number of pins of entire chip, while and gating circuit can be eliminated risk and the competition between the adjacent lines sweep signal, reach the purpose of optimal control sweep circuit.
Described active matrix driving circuit 1 is made up of 1920 * 1080 driven with active matrix unit, and described driven with active matrix unit is according to control signal and picture signal, and the voltage of control grating light modulator is to realize the modulation to light; Active matrix driving circuit can adopt based on the active driver element of DRAM or based on the active driver element of SRAM, wherein, referring to Fig. 2, described active driver element based on DRAM comprises the first metal-oxide-semiconductor T1 and a capacitor C s, the grid of the described first metal-oxide-semiconductor T1 is electrically connected with the output terminal of horizontal drive circuit 2, the drain electrode of the first metal-oxide-semiconductor T1 is electrically connected with column drive circuit 3, the source electrode of the first metal-oxide-semiconductor T1 is electrically connected with the end of capacitor C s, the other end ground connection of described capacitor C s, the source electrode of the described first metal-oxide-semiconductor T1 also is used for being connected with the bottom electrode 5 of grating light modulator, thereby the voltage of control grating light modulator is realized the modulation to light; Referring to Fig. 3, described active driver element based on SRAM comprises the second metal-oxide-semiconductor T2 and two phase inverters, each phase inverter is made up of two metal-oxide-semiconductors, the grid of the described second metal-oxide-semiconductor T2 is electrically connected with the output terminal of horizontal drive circuit 2, the drain electrode of the second metal-oxide-semiconductor T2 is electrically connected with column drive circuit 3, constitute 4 metal-oxide-semiconductor T3 of two phase inverters, T4, T5, the T6 composition is connected into ring circuit, the described input end that is connected into ring circuit is electrically connected with the source electrode of the second metal-oxide-semiconductor T2, the output terminal that is connected into ring circuit is used for being connected with the bottom electrode 5 of grating light modulator, unlatching by metal-oxide-semiconductor or end realizes the control to MEMS grating light modulator bottom electrode electromotive force.
Comprise a control device 4 in the described raster optical modulator projection device, described control device 4 can be selected field programmable gate array (FPGA controller) or other control device for use, in order to receive picture signal, output a control signal to horizontal drive circuit 2, output control signal and picture signal are to column drive circuit 3.
Referring to Fig. 1, described horizontal drive circuit 2 comprises the circuit that 22,1080 level shifters of gating circuit 23 of 21,1080 the gating elements compositions of 1080 line shift register circuit that connect are successively formed, described line shift register 21 is used for the control signal of receiving control device 4 and outputs to gating circuit 22,1080 output terminals of described gating circuit 22 are connected one by one with the input end of 1080 level shifters 23 respectively, output to the capable gating signal control end of active matrix driving circuit 1 after the voltage amplification of level shifter 23 with gating circuit 22 outputs; Described line shift register circuit 21 synchronizations have only output terminal output high level, and all the other output terminals all are low level, and high level is along with clock is exported to backward shift, and the row to the grating light modulator array carries out gating successively; Another input end of described gating circuit 22 is electrically connected with control device 4, can eliminate competition and risk between the adjacent lines gating signal, reaches the purpose of optimal control sweep circuit; Described gating element is and door still also can use other gating elements, as rejection gate.
Referring to Fig. 1, described column drive circuit 3 comprises 1920 the column shift register circuit 31 (selecting for use 64 30 shift register to realize in the present embodiment) that connects successively, 1920 latch circuit 32 and 1920 level shifters 33, be shifted by clock, the view data of delegation's grating light modulator serial is successively moved in 64 shift registers 31, parallel then being input in the latch circuit 32, under the control of the latch clock control signal that control device sends, picture signal is outputed to the column data input end of active matrix driving circuit 1 by level shifter 33, realize serial input data and line output.
Referring to Fig. 4, described level shifter is by the 3rd phase inverter N3, the 4th phase inverter N4, the 5th phase inverter N5, hex inverter N6, the 7th metal-oxide-semiconductor T7, the 8th metal-oxide-semiconductor T8, the 9th metal-oxide-semiconductor T9 and the tenth metal-oxide-semiconductor T10 form, described the 3rd phase inverter N3 and the 4th phase inverter N4 series connection, in order to export a pair of reverse control signal, the 7th metal-oxide-semiconductor T7, the 8th metal-oxide-semiconductor T8, the 9th metal-oxide-semiconductor T9 and the tenth metal-oxide-semiconductor T10 are used to amplify voltage, the 5th phase inverter N5 of described series connection, hex inverter N6 can improve the driving force of level shifter output, the output terminal of the 3rd phase inverter N3 is connected with the grid of the 9th metal-oxide-semiconductor T9, the output terminal of described the 4th phase inverter N4 is connected with the grid of the 7th metal-oxide-semiconductor T7, the source ground of the 7th metal-oxide-semiconductor T7 and the 9th metal-oxide-semiconductor T9, the source electrode of the 8th metal-oxide-semiconductor T8 and the tenth metal-oxide-semiconductor T10 meets high-voltage power supply Vdd, the drain electrode of the 7th metal-oxide-semiconductor T7 and the 8th metal-oxide-semiconductor T8 is connected with the grid of the tenth metal-oxide-semiconductor T10, the drain electrode of the 9th metal-oxide-semiconductor T9 and the tenth metal-oxide-semiconductor T10 is connected with the grid of the 8th metal-oxide-semiconductor T8, the grid of the tenth metal-oxide-semiconductor T10 is connected with the input end of the 5th phase inverter N5, like this, low-voltage signal from the 3rd phase inverter N3 input, after conversion, can be by the output terminal output high-voltage signal of hex inverter N6.
Described control device can send 5 control signal rst, clk_rr, clk_add, clk_cl and clk_cr, 1 capable shifted data signal data_add and 64 s' column data signal data, reset signal rst low level is effective, and when rst was high level, the gated sweep circuit was started working.When the rising edge of row shift clock clk_cr arrives, simultaneously 64 bit data are input to first output port of 64 30 column shift register circuit 31 respectively.Clk_cr through 30 rising edge clocks after, the data of 64 column shift register 31 output terminals are update all, row latch clocks clk_cl stored first row, 1920 bit data into 1920 simultaneously and ranked in the latch 32 this moment.1920 data of ranking latch 32 outputs are carried out the conversion of low pressure to high pressure through level shifter 33, are input to 1920 column data input ports of active matrix driving circuit 1 then.Simultaneously, row shift clock clk_rr rising edge arrives, and row shifted data signal data_add is input to first output terminal of line shift register circuit 21, and first be output as high level, and all the other positions are low level.The output signal of each line shift register 21 and common signal clk_add as with two input signals of door, and after level shifter amplifies, be input to the capable gating signal control end of active matrix driving circuit 1, gating (unlatching) the first capable active matrix unit with the output signal of door.Because have only the first row driven with active matrix by gating, so the column data signal can only be input in the memory capacitance of the first row active matrix, other row are in hold mode.Line shift register 21 ring shifts output high level, active matrix unit of other row of sweep gate successively, but delegation active matrix unit can only be arranged at every turn by gating, there is not the active matrix unit of gating then to keep its current state.When with grating light modulator and active matrix monolithic when integrated, the conducting by control driven with active matrix unit or end just can realize the control to grating light modulator voltage.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (6)
1. the gated sweep circuit of raster optical modulator projection device in order to drive the pel array that capable grating light modulator of M row * N formed, is characterized in that: comprise
Active matrix driving circuit is made up of M * N driven with active matrix unit, and according to control signal and picture signal, the voltage of control grating light modulator is to realize the modulation to light;
The control signal that first driving circuit, receiving control device send is with the grating light modulator on the same straight line of gating; Described first driving circuit comprises first shift-register circuit of the N position that connects successively, the gating circuit that a N gating element is formed, the circuit that a N level shifter is formed, described first shift register is used for the control signal of receiving control device and outputs to gating circuit, the N of a described gating circuit output terminal is connected one by one with the input end of N level shifter respectively, outputs to the capable gating signal control end of active matrix driving circuit after the voltage amplification of level shifter with gating circuit output; And
Control signal that second driving circuit, receiving control device send and picture signal are to output to view data the grating light modulator of gating; Described second driving circuit comprises second shift-register circuit of the M position that connects successively, latch circuit and M circuit that level shifter is formed of M position, described second shift-register circuit is in order to the picture signal of receiving control device, and output in the latch circuit and preserve, under the control of the latch clock control signal that control device sends, picture signal is outputed to the column data input end of active matrix driving circuit by level shifter.
2. the gated sweep circuit of raster optical modulator projection device as claimed in claim 1, it is characterized in that: described first driving circuit is a horizontal drive circuit, second driving circuit is a column drive circuit.
3. the gated sweep circuit of raster optical modulator projection device as claimed in claim 1 is characterized in that: described gating element for and door.
4. the gated sweep circuit of raster optical modulator projection device as claimed in claim 1 is characterized in that: active matrix driving circuit, first driving circuit, the second driving circuit monolithic are integrated.
5. as the gated sweep circuit of each described raster optical modulator projection device in the claim 1 to 4, it is characterized in that: described driven with active matrix unit comprises first metal-oxide-semiconductor (T1) and an electric capacity (Cs), the grid of described first metal-oxide-semiconductor (T1) is electrically connected with the output terminal of first driving circuit, the drain electrode of first metal-oxide-semiconductor (T1) is electrically connected with second driving circuit, the source electrode of first metal-oxide-semiconductor (T1) is electrically connected with an end of electric capacity (Cs), the other end ground connection of described electric capacity (Cs), the source electrode of described first metal-oxide-semiconductor (T1) also are used for being connected with the bottom electrode of grating light modulator.
6. as the gated sweep circuit of each described raster optical modulator projection device in the claim 1 to 4, it is characterized in that: described driven with active matrix unit comprises second metal-oxide-semiconductor (T2) and two phase inverter (N1, N2), the grid of described second metal-oxide-semiconductor (T2) is electrically connected with the output terminal of first driving circuit, the drain electrode of second metal-oxide-semiconductor (T2) is electrically connected with second driving circuit, described two inverter group become to be connected into ring circuit, the described input end that is connected into ring circuit is electrically connected with the source electrode of second metal-oxide-semiconductor (T2), and the output terminal that is connected into ring circuit is used for being connected with the bottom electrode of grating light modulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101039544A CN101567173B (en) | 2009-05-26 | 2009-05-26 | Control scanning circuit of raster optical modulator projection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101039544A CN101567173B (en) | 2009-05-26 | 2009-05-26 | Control scanning circuit of raster optical modulator projection device |
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| CN101567173A CN101567173A (en) | 2009-10-28 |
| CN101567173B true CN101567173B (en) | 2011-11-09 |
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| CN2009101039544A Expired - Fee Related CN101567173B (en) | 2009-05-26 | 2009-05-26 | Control scanning circuit of raster optical modulator projection device |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9159277B2 (en) * | 2011-09-20 | 2015-10-13 | Pixtronix, Inc. | Circuits for controlling an array of light modulators of a display apparatus to generate display images |
| WO2017145348A1 (en) * | 2016-02-26 | 2017-08-31 | 株式会社日立製作所 | Imaging device |
| CN109587418B (en) * | 2018-12-11 | 2020-10-13 | 锐芯微电子股份有限公司 | Data reading device of image sensor |
| CN114779464A (en) * | 2022-05-24 | 2022-07-22 | 北京有竹居网络技术有限公司 | Optical signal modulator, control method and projection equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002023683A (en) * | 2000-07-07 | 2002-01-23 | Sony Corp | Display device and drive method therefor |
| JP2002333870A (en) * | 2000-10-31 | 2002-11-22 | Matsushita Electric Ind Co Ltd | Liquid crystal display device, el display device and drive method therefor and display pattern evaluation method of subpixel |
| CN1422420A (en) * | 2000-12-06 | 2003-06-04 | 索尼公司 | Timing generating circuit for display and display having the same |
| CN101382655A (en) * | 2008-10-09 | 2009-03-11 | 重庆大学 | Active matrix driven grating light modulator |
-
2009
- 2009-05-26 CN CN2009101039544A patent/CN101567173B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002023683A (en) * | 2000-07-07 | 2002-01-23 | Sony Corp | Display device and drive method therefor |
| JP2002333870A (en) * | 2000-10-31 | 2002-11-22 | Matsushita Electric Ind Co Ltd | Liquid crystal display device, el display device and drive method therefor and display pattern evaluation method of subpixel |
| CN1422420A (en) * | 2000-12-06 | 2003-06-04 | 索尼公司 | Timing generating circuit for display and display having the same |
| CN101382655A (en) * | 2008-10-09 | 2009-03-11 | 重庆大学 | Active matrix driven grating light modulator |
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