CN102595155B - Driving method of three-dimensional displayer and driving device thereof - Google Patents
Driving method of three-dimensional displayer and driving device thereof Download PDFInfo
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Abstract
The invention provides a driving device of a three-dimensional displayer, which comprises a gray-level look-up table module, a synchronization unit, a storage selector, a storage device and a driving circuit, wherein the gray-level look-up table module generates a first overdriving gray value and a second overdriving gray value according to the target gray value of an image and the gray value of a before image; the synchronization unit sends out synchronous signals according to the picture periods of the image; the storage selector determines to output the present gray value or the gray value of the before image according to the synchronous signals; and the storage device outputs the gray value of the before image and stores the gray value from the storage selector. The driving circuit outputs a driving signal to present the image with the target gray value during working hours at the first picture period and the second picture period of the image according to the first overdriving gray value and the second overdriving gray value.
Description
Technical field
The invention relates to a kind of driving method and drive unit thereof of display, particularly relevant for a kind of driving method and drive unit thereof of three dimensional display.
Background technology
Fig. 1 describes the mechanism of traditional three dimensional display.Three dimensional display 100 needs user to utilize a pair of polaroid glasses 110 to watch.
Three dimensional display is that the reaction speed with 120Hz presents left-eye images L and right-eye image R alternately.Each image is comprised of a picture (frame).Display 100 when time 0-1/120 show image F1, when time 1/120-2/120 show image F2, when time point 2/120-3/120 show image F3, by that analogy.When time point 0, open the right eyeglass of polaroid glasses 110, make right eye receive image F1, when time point 1/120, open the left eyeglass of polaroid glasses 110, make left eye receive image F2, by that analogy.
Three dimensional display evolved to and used 240Hz image switching afterwards.Yet, if an image is comprised of a picture (frame), that is be that a picture is to present time of 1/240 second, because of the reaction speed of display pannel, not necessarily get caught up in, by causing, cannot in an image time, reach this gray scale having of image, and cause user visually to occur that get lines crossed (crosstalk) of image disturbing.
Therefore the device or the method that, are necessary to provide a kind of image that can overcome the display of 240Hz to get lines crossed and disturb.
Summary of the invention
The invention provides a kind of driving method of three dimensional display.Driving method comprises: the first picture cycle in the first image receives the first picture data of the first image by processing module, the first picture data comprises first object gray value; In the first picture cycle of the first image by gray scale table look-up module, according to first object gray value and front image greyscale value, produce first gray value of overdriving; The first picture cycle in the first image makes front image greyscale value maintain original gray value by storing selector and storage device; In the first picture cycle of the first image by drive circuit according to the first gray value output drive signal of overdriving; The second picture cycle in the first image receives the second picture data of the first image by processing module, the second picture data comprises first object gray value; In the second picture cycle of the first image by gray scale table look-up module, according to first object gray value and front image greyscale value, produce second gray value of overdriving; The second picture cycle in the first image makes front image greyscale value be updated to first object gray value by storing selector and storage device; And in the second picture cycle of the first image, by drive circuit according to the second gray value output drive signal of overdriving, make in the operating time of the second picture of the first image form there is first object gray value the first image in three dimensional display.
The present invention more provides a kind of three dimensional display drive unit.Drive unit comprises processing module, gray scale table look-up module, lock unit, storage selector, storage device and drive circuit.Processing module receives image data in an image cycle, and image data comprises a target gray value of image.Gray scale table look-up module produces first gray value of overdriving in the first picture cycle of image according to target gray value and front image greyscale value, in the second picture cycle of image, according to target gray value and front image greyscale value, produces second gray value of overdriving.Lock unit sends synchronizing signal according to image data, the first picture cycle of the first state representation image of synchronizing signal, the second picture cycle of the second state representation image of synchronizing signal.Store selector and determine the current gray value of output or front image greyscale value according to synchronizing signal.Storage device is in order to export front image greyscale value and to store from the image greyscale value that stores selector.Drive circuit in the first picture cycle of image according to the first gray value output drive signal of overdriving; In the second picture cycle of image according to the second gray value output drive signal of overdriving, make in an operating time of the second picture of image form there is target gray value image in three dimensional display.
Above-described driving method and drive unit do not need additional hardware cost and can reach under the service speed of 240Hz, increase the time of liquid crystal drive and promote the usefulness of overdriving.Make display floater demonstrate the image of target gray scale, solve the impact that vision imaging is being got lines crossed.
Accompanying drawing explanation
Fig. 1 is the mechanism of conventional three-dimensional display;
Fig. 2 a-2b is the mechanism of three dimensional display of the present invention;
Fig. 3 is three dimensional display drive unit of the present invention; And
Fig. 4 a-4b is the flow chart of the driving method of three dimensional display of the present invention.
Main element symbol description:
100～three dimensional display, 110～polaroid glasses
120～panel, 130～polaroid
210～display floater
300～three dimensional display drive unit, 310～processing module
312～color temperature adjusting unit, 314～compression unit
316～clip unit 320～storage device
330～gray scale table look-up module, 340～drive circuit
350～lock unit 360～storage selector
380～panel
402,404,406,408,410,412,414,416,418,420,422～method step
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.
Fig. 2 a-2b is the mechanism of three dimensional display of the present invention.Image on display floater 210 is comprised of continuous picture L1, L2, R1 and R2.The first picture L1 of the first image and the second picture L2 form left-eye images L, and the first picture R1 of the second image and the second picture R2 formation right-eye image R.In the present embodiment, in the operating time of second picture L2 of left-eye images L (duty time) display system, activate the left eyeglass lens of polaroid glasses, allow user receive the first image (left-eye images) this period of operating time.Similarly, in the operating time of the second picture R2 of right-eye image R, just activate the right eye eyeglass of polaroid glasses, allow user receive the second image (right-eye image) this period of operating time.
Fig. 3 is three dimensional display drive unit of the present invention.Three dimensional display drive unit 300 comprises that a processing module 310, a storage device 320, a gray scale table look-up module 330, one drive circuit 340, a lock unit 350 and store selector 360.
Processing module 310 is for receiving image data during an image cycle, then image data done and compressed or the image processing such as clip.In the present embodiment, image data is mainly the target gray value of image.Processing module 310 comprises that a color temperature adjusting unit 312, a compression unit 314 and clip unit 316.In the present embodiment, may receive 8 or 10 s' image data.Through clipping unit 314, convert 10 image datas to 8 bit data.See through compression unit 316,10 or 8 image datas (with regard to one pixel) are compressed into 6 image datas.In compression unit 316, may comprise a mapping look-up of table (not shown).
Gray scale table look-up module 330 is during for the first picture cycle when at image, according to target gray value and front image greyscale value produce first overdrive gray value and when second picture cycle at image according to target gray value and front image greyscale value generation second gray value of overdriving.
Lock unit 350 is for producing synchronizing signal according to the picture cycle of image, to represent that current time point is at the first picture cycle (R1/F3) or picture second round (R2/F4).For instance, when first picture cycle (R1/F3) of image, synchronizing signal is the first state, and for example current potential 0, and when the second picture cycle (R2, F4) of image, synchronizing signal is the second state, and for example current potential 1, but is not limited to this.
Store selector 360 and will determine export target gray value or front image greyscale value according to the current potential of synchronizing signal.For instance, when synchronizing signal is 1, store selector 360 outputs from the target gray value of processing module 310; When synchronizing signal is 0, store the front image greyscale value that selector 360 outputs carry out self-storing mechanism 320.Storage device 320 is in order to export front image greyscale value to gray scale table look-up module 330, and then storage is from the image greyscale value that stores selector 360.
In the present embodiment, by take the situation that gray value is greater than target gray value of overdriving, be example.According to different demands, gray scale is tabled look-up and can also be designed overdrive voltage and be less than or equal to target gray value.Please refer to Fig. 2 b.For instance, when picture F1 and F2 (left-eye images), the gray scale of image is zero, and when picture F3 and F4 (right-eye image), set objective gray scale is 125 the image of target gray scale 125 (hope allow beholder see to have).For right-eye image, front image greyscale value is zero.When the first picture cycle R1/F3, gray scale table look-up module 330 can obtain according to target gray scale and front image greyscale the gray value of overdriving.Lock unit 350 sends the synchronizing signal of 0 current potential that represents the first picture cycle.Store selector 360 and determine not upgrade the front image greyscale value in storage device 320 according to 0 current potential.Namely maintaining current front image greyscale value is 0.When at the second picture cycle R2/F4, target gray scale is constant, and front image greyscale maintains gray value 0, so gray scale table look-up module 330 can obtain the same gray value of overdriving according to target gray scale and front image greyscale.Lock unit 350 sends the synchronizing signal of 1 current potential that represents the second picture cycle.Store selector 360 and determine that according to 1 current potential the front shadow gray value upgrading in storage device 320 is 125.When the first picture cycle L1/F5 of the second image, the target gray scale of image changes into 165, and front image greyscale has changed over gray value 125.Now, gray scale table look-up module 330 can obtain the new gray value of overdriving according to target gray scale and front image greyscale.Lock unit 350 sends the synchronizing signal of the current potential that represents the first picture cycle.Store selector 360 and determine not upgrade the front image greyscale value in storage device 320 according to 0 current potential.When the second picture cycle R2/F4 of the second image, target gray scale is constant, and front image greyscale maintains gray value 125, so gray scale table look-up module 330 can obtain the same gray value of overdriving according to target gray scale and front image greyscale.Lock unit 350 sends the synchronizing signal of 1 current potential that represents the second picture cycle.Store selector 360 and determine that according to 1 current potential the front shadow gray value upgrading in storage device 320 is 165.
Drive circuit 340 is in the first picture cycle of image, according to the first gray value output drive signal of overdriving.And in the second picture cycle of image, according to the second gray value output drive signal of overdriving.Make in an operating time of the second picture of image form there is a target gray value image in three dimensional display.Utilize the gray value driving display of overdriving of double repetition, driving time is increased and promote the usefulness of overdriving.Operating time is also the time of polaroid glasses runnings, only that is to say that user's left and right eyes inborn ability does not receive image within this time in each cycle.With reference to figure 2a, the operating time is set operating time of end of second picture cycle (R2/F4 and L2/F6) of image.In the present embodiment, the operating time is 1.572ms, but is not limited to this.
Fig. 4 is the flow chart of the driving method of three dimensional display of the present invention.In addition with reference to figure 2b.First in step 402, by a processing module in the first picture cycle R1/F3 of the first image R, receive the first picture data of the first image.For example the time 2/240, receive the first picture data of the first image.The first picture data comprises the target gray value (first object gray value) of the first image, for example 125.Now, front image greyscale value is 0.
Then,, in step 404, by gray scale table look-up module, according to first object gray value and front image greyscale value, produce first gray value of overdriving.In the present embodiment, first object gray value is 125, and front image greyscale value is zero.
Then in step 406, by one drive circuit according to the first gray scale output drive signal of overdriving.As shown in Figure 2 b, during the first picture of the first image R, during R1/F3, gray value is being risen to X value.
In step 408, by image greyscale value before storing selector and storage device and making according to one first state of a synchronizing signal, maintain original gray value.Namely storing selector determines the front image greyscale value of output and is stored into storage device according to 0 current potential of synchronizing signal.
In step 410, in the second picture cycle R2/F4 in the first image cycle, by processing module, receive the second picture data of the first image, the second picture data comprises the target gray value (first object gray value) of the first image.
In step 412, by gray scale table look-up module, according to first object gray value and front image greyscale value, produce second gray value of overdriving.Now, first object gray value is still 125, and front image greyscale value is maintained zero.
In step 414, by drive circuit according to the second gray value output drive signal of overdriving, make in the operating time of the R of the first image the second picture form there is first object gray value the first image R in three dimensional display.
In step 416, by storing selector and storage device, according to the second state of synchronizing signal, make front image greyscale value equal first object gray value (being also 125)/renewal storage device.Namely storing selector determines export target gray value and is stored into storage device according to 1 current potential of synchronizing signal.
In the present embodiment, the situation that gray value is greater than target gray value of overdriving of take is example.In the step 404 of tabling look-up and step 412, by repeating to input identical first object gray value 125, to gray scale table look-up module, obtain the identical gray value of overdriving with front image greyscale value 0, impel image driving time to increase, and then allow display floater demonstrate the image of target gray scale.It is because use the technology of overdriving to impel the response of liquid crystal display to accelerate to rise that the gray value of overdriving is greater than 125 of first object gray values.According to the difference of display reaction rate, over-drive value may be different, and gray scale is tabled look-up and can also be designed overdrive voltage and be less than or equal to target gray value.
With reference to figure 2b, during picture R2/F4, the gray scale of image is risen to 125 by X.At Tx time point, activate polaroid glasses, make user's right eye see the first image R on three dimensional display with first object gray value 125 through polaroid glasses.In the present embodiment, the operating time is approximately 1.572 seconds, but is not limited to this.
Then,, in step 418, in the first picture cycle L1/F5 of the second image L, by this processing module, receive the first picture data of the second image.For example the time 4/240, receive the first picture data of the second image L.The first picture data of the second image L comprises the target gray value (the second target gray value) of the second image L, for example 165.Now, front image greyscale value is 125.
In step 420, by gray scale table look-up module, according to the second target gray value and front image greyscale value, produce the 3rd gray value of overdriving.In now, the second target gray value is 165, and front image greyscale value is 125.
In step 422, by drive circuit according to the 3rd gray value output drive signal of overdriving.As shown in Figure 2 b, during L1/F5, gray value is risen to Y value.
In step 424, by storing selector and storage device, according to the first state of synchronizing signal, make front image greyscale value maintain current gray value.Namely storing selector determines the front image greyscale value of output and is stored into storage device according to 0 current potential of synchronizing signal.
In step 426, in the second picture cycle L2/F6 in the second image cycle, by processing module, receive the second picture data of the second image, the second picture data comprises the target gray value (the second target gray value) of the second image.
In step 428, by gray scale table look-up module, according to the second target gray value 165 and front image greyscale value 125, produce the 4th gray value of overdriving.
In step 430, by drive circuit, according to the 4th gray value of overdriving, more promote the gray value of the second image L, make in an operating time of the second picture of the second image form there is the second target gray value the second image L in three dimensional display.With reference to figure 2b, during picture F6/L2, the gray scale of image is risen to 165 by Y.At Ty time point, activate polaroid glasses, make user's left eye to see the second image L on three dimensional display with the second target gray value 165 through polaroid glasses.In the present embodiment, the operating time is approximately 1.572 seconds, but is not limited to this.
Finally, in step 432, by storing selector and storage device, according to the second state of synchronizing signal, make front image greyscale value equal the second target gray value (that is 165)/renewal storage device.Namely storing selector determines receiving target gray value and is stored into storage device according to 1 current potential of synchronizing signal.Now, first object gray value is still 165, and front image greyscale value is maintained 125.
In the present embodiment, constant by image greyscale value before keeping in holder 320, display is driven by the gray value of overdriving of double repetition, and then increase driving time and the lifting usefulness of overdriving.
Although the present invention discloses as above with preferred embodiment; so it is not in order to limit the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when doing a little modification and perfect, so protection scope of the present invention is worked as with being as the criterion that claims were defined.
Claims (14)
1. a driving method for three dimensional display, comprising:
In one first picture cycle of one first image, by a processing module, receive one first picture data of this first image, this first picture data comprises a first object gray value;
By a gray scale table look-up module, according to this first object gray value and a front image greyscale value, produce one first gray value of overdriving;
By a storage selector and a storage device, according to one first state of a synchronizing signal, make this front image greyscale value maintain existing gray value;
By one drive circuit, according to this first gray value output drive signal of overdriving;
In one second picture cycle of this first image, by this processing module, receive one second picture data of this first image, this second picture data comprises this first object gray value;
By this gray scale table look-up module, according to this first object gray value and this front image greyscale value, produce one second gray value of overdriving;
By this storage selector and this storage device, according to one second state of this synchronizing signal, make this front image greyscale value equal one second target gray value; And
By this drive circuit, according to this second gray value output drive signal of overdriving.
2. the driving method of three dimensional display as claimed in claim 1, is characterized in that, in an operating time of the second picture of this first image, forms this first image in this three dimensional display.
3. the driving method of three dimensional display as claimed in claim 1, is characterized in that, more comprises:
In one first picture cycle of one second image, by this processing module, receive one first picture data of this second image, this first picture data comprises one second target gray value;
By this gray scale table look-up module, according to this second target gray value and a front image greyscale value, produce one the 3rd gray value of overdriving;
By this storage selector and this storage device, according to this first state of this synchronizing signal, make this front image greyscale value maintain existing gray value;
By this drive circuit, according to the 3rd gray value output drive signal of overdriving;
In one second picture cycle of this second image, by this processing module, receive one second picture data of this second image, this second picture data comprises this second target gray value;
By this gray scale table look-up module, according to this second target gray value and this front image greyscale value, produce one the 4th gray value of overdriving;
By this storage selector and this storage device, according to this second state of this synchronizing signal, make this front image greyscale value equal this second target gray value; And
By this drive circuit, according to the 4th gray value output drive signal of overdriving.
4. the driving method of three dimensional display as claimed in claim 3, is characterized in that, in an operating time of the second picture of this second image, forms this second image.
5. the driving method of three dimensional display as claimed in claim 3, is characterized in that, when the first image is left-eye images, this second image is right-eye image, and when the first image is right-eye image, this second image is left-eye images.
6. the driving method of three dimensional display as claimed in claim 4, is characterized in that, this first image and this second image are continuous.
7. the driving method of three dimensional display as claimed in claim 1, is characterized in that, this first picture cycle of this of this synchronizing signal first this image of state representation, this second picture cycle of this of this synchronizing signal second this image of state representation.
8. the driving method of three dimensional display as claimed in claim 7, is characterized in that, this first gray value of overdriving equates with this second gray value of overdriving.
9. a three dimensional display drive unit, comprising:
One processing module, in an image cycle, receives this image data, and this image data comprises a target gray value of this image;
One gray scale table look-up module, in one first picture cycle of this image, according to this target gray value and a front image greyscale value, produce one first gray value of overdriving, in one second picture cycle of this image, according to this target gray value and this front image greyscale value, produce one second gray value of overdriving;
One lock unit, sends a synchronizing signal according to this image data, and this synchronizing signal comprises the first state and the second state;
One stores selector, according to this synchronizing signal, determines this target gray value of output or this front image greyscale value;
One storage device, in order to export this front image greyscale value and to store the image greyscale value from this storage selector;
One drive circuit, in this first picture cycle of this image, according to this first gray value output drive signal of overdriving; In this second picture cycle of this image, according to this second gray value output drive signal of overdriving.
10. three dimensional display drive unit as claimed in claim 9, is characterized in that, in an operating time of the second picture of this image, forms this image in this three dimensional display.
11. three dimensional display drive units as claimed in claim 9, is characterized in that, this image comprises left-eye images and right-eye image.
12. three dimensional display drive units as claimed in claim 9, is characterized in that, this processing module more comprises: a color temperature adjusting unit, a compression unit, and one clip unit.
13. three dimensional display drive units as claimed in claim 9, is characterized in that, this first picture cycle of this of this synchronizing signal first this image of state representation, this second picture cycle of this of this synchronizing signal second this image of state representation.
14. three dimensional display drive units as claimed in claim 13, is characterized in that, this first gray value of overdriving equates with this second gray value of overdriving.
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