CN1536552A - Liquid crystal display drive device and method - Google Patents
Liquid crystal display drive device and method Download PDFInfo
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- CN1536552A CN1536552A CNA031086845A CN03108684A CN1536552A CN 1536552 A CN1536552 A CN 1536552A CN A031086845 A CNA031086845 A CN A031086845A CN 03108684 A CN03108684 A CN 03108684A CN 1536552 A CN1536552 A CN 1536552A
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Abstract
The invention disclosed a display driving device, applied to drive a pixel of a display to switch a first grey-scaled state into a second grey-scaled state, and it includes: a first storage device, storing a first voltage data; a second storage device, storing a driving voltage numerical tabular; and a processing device, obtaining a corresponding pixel according to a second voltage data and the first voltage data.
Description
Technical field
The present invention relates to a kind of LCD driving mechanism and method, particularly relate to a kind of driving voltage of pixel between different GTGs that improves LCD, use the LCD driving mechanism of the gray scale states pace of change of accelerating pixel.
Background technology
Known liquid crystal display device structure comprises a plurality of pixels (pixel) of arranging in the array mode at present, the state of liquid crystal changes according to the cross-pressure that is applied thereto in each pixel, owing to the variation of cross-pressure changes the penetrance of liquid crystal, use showing required GTG on the screen.And the method that the type of drive of present LCD widely adopts is driven via the straight line portion in its static voltage and liquid crystal (LC) the penetrance curve.As shown in Figure 1, Fig. 1 is the synoptic diagram that concerns of the penetrance of a kind of LC and cross-pressure.Represent that with one 4 GTG is an example, the penetrance of LC is divided into 16 kinds of GTG G
On～G
OffBy the skew lines part among Fig. 1, GTG G
On～G
OffThe driving voltage V that is corresponded to respectively
On～V
OffBe desirable to producing GTG G
On～G
OffThe time, the cross-pressure that on pixel, should possess.And known driving method is to receive a series of GTG in regular turn with a driver, then in regular turn provide corresponding driving voltage with the pixel in the driving display.
But, in actual conditions, when pixel had specific cross-pressure, this pixel may not have corresponding GTG, and it is obvious especially that this phenomenon more seems when the pixel cross-pressure changes by a small margin.In fact, change the required time of GTG for LCD, the gray scale variation of little degree needs more time than the gray scale variation of big degree usually, when its reason is little degree gray scale variation, due to the cross-pressure variable quantity of pixel is less.As mentioned above, because change in voltage is little, will cause gray scale response can't cooperate the consequence of actual displayed needs.Thus, the shown dynamic menu image quality of LCD will be had a strong impact on.
Summary of the invention
In view of this, in order to address the above problem, fundamental purpose of the present invention is to provide a kind of LCD driving mechanism and method, utilize pixel voltage data on the present picture and the pixel voltage data on the next picture to compare, and obtain according to comparison list or specific algorithm and can make pixel have the charge volume of fastest response.
For realizing above-mentioned purpose, the present invention proposes a kind of drive device for display, be applicable to that the pixel that drives a display is converted to one second gray scale states by one first gray scale states, this device comprises: one first memory storage, in order to store one first voltage data that desire demonstrates pixel above-mentioned first gray scale states; One second memory storage is changed a pairing driving voltage numerical tabular in order to the various gray scale states of storage pixel; An and treating apparatus, in order to pixel is demonstrated one second voltage data of above-mentioned second gray scale states and above-mentioned first voltage data of being stored by above-mentioned first memory storage, obtain the pixel that a corresponding pixel drive voltage drives aforementioned display device from the above-mentioned driving voltage numerical tabular that is stored in above-mentioned second memory storage according to the desire that is provided by an external circuit.
In addition, the present invention proposes a kind of display drive method, the pixel that is applicable to driving display is converted to second gray scale states by first gray scale states, this method comprises the following steps: to provide one first memory storage, and it is recording pixel pairing driving voltage numerical tabular when various gray scale states are changed in advance; Above-mentioned driving voltage numerical tabular comprises the dynamic driving voltage that immovable static drive voltage of represent pixel GTG and represent pixel GTG change; One second memory storage is provided, and its storage desire demonstrates pixel one first driving voltage of above-mentioned first gray scale states; And pixel is demonstrated one second driving voltage and above-mentioned first driving voltage of above-mentioned second gray scale states according to desire, table look-up from above-mentioned driving voltage numerical tabular and obtain the pixel that a corresponding pixel drive voltage is come driving display.
Description of drawings:
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and be described with reference to the accompanying drawings as follows.
Fig. 1 shows the synoptic diagram that concerns of a kind of penetrance of liquid crystal and cross-pressure.
Fig. 2 shows the block diagram according to the described LCD driving mechanism of the embodiment of the invention.
The reference numeral explanation:
21～external circuit
22～the first memory storages
23～the second memory storages
24～treating apparatus
25～display
Embodiment
Below will introduce LCD driving mechanism and the driving method of realizing the object of the invention.
Consult Fig. 2, Fig. 2 shows the block diagram according to the described LCD driving mechanism of the embodiment of the invention.According to the described LCD driving mechanism of the embodiment of the invention is pixel in order to driving display 25, makes it be converted to the second follow-up gray scale states by first gray scale states, and it comprises following structure.
The data that first memory storage 22 is stored are first voltage data of pixel when first gray scale states of display 25, and voltage data is when being documented in first gray scale states, the corresponding voltage value that pixel is required, and this magnitude of voltage can be with reference to graph of a relation as shown in Figure 1.
Second memory storage 23, change a pairing driving voltage numerical tabular in order to the various gray scale states of storage pixel, the driving voltage numerical tabular comprises the dynamic driving voltage that immovable static drive voltage of represent pixel GTG and represent pixel GTG change, and it builds up according to experiment, simulation calculation or historical record.The voltage range that general known liquid crystal display drive circuit puts on pixel is V
OnTo V
OffBetween voltage range, this is so-called pixel static drive voltage range, as shown in Figure 1, V wherein
OnWith V
OffBe respectively the magnitude of voltage that makes static static maximum transmission rate that shows of pixel and static minimum light transmission rate (for example the brightest attitude and the darkest attitude).And the pairing range of voltage values of dynamic driving voltage comprises pairing range of voltage values of static drive voltage and range of voltage values in addition thereof, is limited to the maximum voltage value that pixel can bear on its value.Because dynamic driving voltage transitions interval is greater than static drive voltage transitions interval; That is dynamic driving voltage transitions interval will be greater than V
OnTo V
OffInterval.As mentioned above, the cross-pressure that pixel is born increases, and it changes the required time of GTG will be shorter, is in order to allow penetrance arrive predetermined GTG exactly, to avoid pixel excessively to discharge and recharge and calculate the voltage transitions value of making permission at this according to experimental simulation.Same, second voltage data can be with reference to graph of a relation as shown in Figure 1.So can try to achieve the driving voltage value between the different gray scale states.
Treating apparatus 24, for example, digital signal processor (Digital Signal Processor), addressing circuit or branch multiplexer etc., the desire that is provided in order to reception external circuit 21 demonstrates second voltage data of second gray scale states and first voltage data of being stored by first memory storage 22 with pixel, and obtain the pixel that corresponding pixel drive voltage is come driving display 25 from the driving voltage numerical tabular that is stored in second memory storage 23, perhaps can be according to desiring to make pixel demonstrate second driving voltage of second gray scale states, and second first driving voltage stored of memory storage 23, table look-up from the driving voltage numerical value correction chart that is stored in first memory storage 22 and to obtain corresponding pixel drive voltage modified value.And treating apparatus 24 is revised second driving voltage according to the pixel drive voltage modified value, and to produce the pixel that the actual pixels driving voltage comes driving display 25, when first and second gray scale states was identical, the pixel drive voltage modified value was zero; Otherwise, when first and second gray scale states not simultaneously, the pixel drive voltage modified value is non-vanishing.Therefore, when first driving voltage during less than second driving voltage, then the actual pixels driving voltage is second driving voltage and above-mentioned pixel drive voltage modified value sum; Otherwise when first driving voltage during greater than second driving voltage, then the actual pixels driving voltage is the poor of second driving voltage and pixel drive voltage modified value.
In addition, treating apparatus 24 to the pixel of above-mentioned display 25, also can be stored in above-mentioned first memory storage 22 to replace above-mentioned first voltage data with second voltage data before adjusting at adjusted second voltage data of output.And by the absolute value of the difference of the obtained pixel drive voltage modified value of driving voltage numerical value correction chart and first voltage absolute value greater than the difference of second voltage and first voltage.That is, in this embodiment,, can effectively accelerate the gray scale states pace of change of pixel by the variable quantity that improves the pixel drive voltage modified value and first voltage.
Moreover treating apparatus 24 also can utilize driving voltage numerical value correction chart and carry out the extremely high-order conversion of low level of driving voltage.In an embodiment of the present invention, be to provide six voltage data to show that to treating apparatus 24 six image data is an example with external circuit 21, yet, in the above-described embodiments, though the voltage data that is only provided six by external circuit to treating apparatus 24, can utilize second memory storage 23 and treating apparatus 24 to carry out low level to high-order contrast, for example converts seven to six, the bias voltage precision cutting of dynamic driving is thinner, to reach more accurate driving.
Though the present invention discloses as above with preferred embodiment; so it is not in order to limit scope of the present invention; those skilled in the art can do some changes and retouching under the future that does not break away from the spirit and scope of the present invention, so protection scope of the present invention is looked accompanying Claim and is as the criterion.
Claims (7)
1. a drive device for display is applicable to that the pixel that drives a display is converted to one second gray scale states by one first gray scale states, and this device comprises:
One first memory storage is in order to store one first voltage data that desire demonstrates pixel above-mentioned first gray scale states;
One second memory storage is changed a pairing driving voltage numerical tabular in order to the various gray scale states of storage pixel; And
One treating apparatus, in order to pixel is demonstrated one second voltage data of above-mentioned second gray scale states and above-mentioned first voltage data of being stored by above-mentioned first memory storage, obtain the pixel that a corresponding pixel drive voltage drives aforementioned display device from the above-mentioned driving voltage numerical tabular that is stored in above-mentioned second memory storage according to the desire that is provided by an external circuit.
2. a drive device for display is applicable to that the pixel that drives a display is converted to second gray scale states by first gray scale states, and this device comprises:
One first memory storage is in order to storage pixel pairing driving voltage numerical tabular when various gray scale states are changed; Above-mentioned driving voltage numerical tabular comprises the dynamic driving voltage that immovable static drive voltage of represent pixel GTG and represent pixel GTG change;
One second memory storage, the storage desire demonstrates pixel one first driving voltage of above-mentioned first gray scale states when pixel is in above-mentioned first gray scale states; And
One treating apparatus, according to desire pixel is demonstrated one second driving voltage of above-mentioned second gray scale states and above-mentioned first driving voltage that above-mentioned second memory storage is stored, table look-up from the above-mentioned driving voltage numerical tabular that is stored in above-mentioned first memory storage and obtain the pixel that a corresponding pixel drive voltage drives aforementioned display device.
3. a drive device for display is applicable to that the pixel that drives a display is converted to second gray scale states by first gray scale states, and this device comprises:
One first memory storage is in order to storage pixel pairing driving voltage numerical value correction chart when various gray scale states are changed;
One second memory storage, storage desires to make pixel to demonstrate one first required driving voltage of above-mentioned first gray scale states; And
One treating apparatus, above-mentioned first driving voltage of storing according to one second driving voltage of desiring to make pixel demonstrate above-mentioned second gray scale states and above-mentioned second memory storage is tabled look-up from the above-mentioned driving voltage numerical value correction chart that is stored in above-mentioned first memory storage and to be obtained a corresponding pixel drive voltage modified value; Above-mentioned treating apparatus utilizes above-mentioned pixel drive voltage modified value to revise above-mentioned second driving voltage, produces the pixel that an actual pixels driving voltage drives aforementioned display device.
4. a display drive method is applicable to that the pixel of driving display is converted to second gray scale states by first gray scale states, and this method comprises the following steps:
One first memory storage is provided, and it is recording pixel pairing driving voltage numerical tabular when various gray scale states are changed in advance; Above-mentioned driving voltage numerical tabular comprises the dynamic driving voltage that immovable static drive voltage of represent pixel GTG and represent pixel GTG change;
One second memory storage is provided, and its storage desire demonstrates pixel one first driving voltage of above-mentioned first gray scale states; And
According to desire pixel is demonstrated one second driving voltage and above-mentioned first driving voltage of above-mentioned second gray scale states, table look-up from above-mentioned driving voltage numerical tabular and obtain the pixel that a corresponding pixel drive voltage is come driving display.
5. a display drive method is applicable to that the pixel of driving display is converted to second gray scale states by first gray scale states, and this method comprises the following steps:
Provide one first memory storage, pairing driving voltage numerical value correction chart when its storage pixel is changed in various gray scale states;
One second memory storage is provided, and storage desires to make pixel to demonstrate one first required driving voltage of above-mentioned first gray scale states;
According to desiring one second driving voltage and above-mentioned first driving voltage that make pixel demonstrate above-mentioned second gray scale states, table look-up from above-mentioned driving voltage numerical value correction chart and to obtain a corresponding pixel drive voltage modified value; And
Utilize above-mentioned pixel drive voltage modified value to revise above-mentioned second driving voltage, and produce the pixel that an actual pixels driving voltage comes driving display.
6. a display drive method is applicable to that the pixel of driving display is converted to second gray scale states by first gray scale states, and this method comprises the following steps:
Receive one first driving voltage that desire demonstrates pixel above-mentioned first gray scale states;
Receive one second driving voltage that desire demonstrates pixel above-mentioned second gray scale states; And
According to above-mentioned first and second driving voltage, a pairing driving voltage numerical tabular is tabled look-up and is obtained the pixel that a corresponding pixel drive voltage is come driving display during from recording pixel in advance in various gray scale states conversion; Above-mentioned driving voltage numerical tabular comprises the dynamic driving voltage that immovable static drive voltage of represent pixel GTG and represent pixel GTG change.
7. a display drive method is applicable to that the pixel of driving display is converted to second gray scale states by first gray scale states, and this method comprises:
Receive one first driving voltage that desire demonstrates pixel above-mentioned first gray scale states;
Receive one second driving voltage that desire demonstrates pixel above-mentioned second gray scale states;
According to above-mentioned first and second driving voltage, a pairing driving voltage correction numerical tabular is tabled look-up and is obtained a corresponding pixel drive voltage modified value during from recording pixel in advance in various gray scale states conversion; And
Utilize above-mentioned pixel drive voltage modified value to revise above-mentioned second driving voltage, and produce the pixel that an actual pixels driving voltage comes driving display.
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|---|---|---|---|
| CNB031086845A CN100359553C (en) | 2003-04-03 | 2003-04-03 | Liquid crystal display drive device and method |
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|---|---|---|---|
| CNB031086845A CN100359553C (en) | 2003-04-03 | 2003-04-03 | Liquid crystal display drive device and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101221737B (en) * | 2007-01-09 | 2010-12-08 | 威达电股份有限公司 | Gray level conversion device and method |
| CN103093652A (en) * | 2011-11-07 | 2013-05-08 | 元太科技工业股份有限公司 | Reading device and control method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW353745B (en) * | 1995-09-07 | 1999-03-01 | Ind Tech Res Inst | Method of driving multi-grey scale liquid crystal display device and device therefor |
| TW486908B (en) * | 2000-08-01 | 2002-05-11 | Hannstar Display Corp | Method for dynamic gray level exchange of high-speed display |
| JP2003084736A (en) * | 2001-06-25 | 2003-03-19 | Nec Corp | Liquid crystal display device |
-
2003
- 2003-04-03 CN CNB031086845A patent/CN100359553C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101221737B (en) * | 2007-01-09 | 2010-12-08 | 威达电股份有限公司 | Gray level conversion device and method |
| CN103093652A (en) * | 2011-11-07 | 2013-05-08 | 元太科技工业股份有限公司 | Reading device and control method thereof |
| CN103093652B (en) * | 2011-11-07 | 2015-08-26 | 元太科技工业股份有限公司 | Reading device and control method thereof |
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| CN100359553C (en) | 2008-01-02 |
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Assignee: Ningbo Chi Chi Electronics Co., Ltd. Assignor: Chimei Optoelectronics Co., Ltd. Contract record no.: 2010990000522 Denomination of invention: Liquid crystal display drive device and method Granted publication date: 20080102 License type: Exclusive License Open date: 20041013 Record date: 20100720 |
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