CN115064136B - Cholesterol liquid crystal display and driving method thereof - Google Patents
Cholesterol liquid crystal display and driving method thereof Download PDFInfo
- Publication number
- CN115064136B CN115064136B CN202210811521.XA CN202210811521A CN115064136B CN 115064136 B CN115064136 B CN 115064136B CN 202210811521 A CN202210811521 A CN 202210811521A CN 115064136 B CN115064136 B CN 115064136B
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- Prior art keywords
- voltage
- data line
- liquid crystal
- crystal display
- line
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- 238000000034 method Methods 0.000 title claims abstract description 21
- HVYWMOMLDIMFJA-DPAQBDIFSA-N cholesterol Chemical compound C1C=C2C[C@@H](O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H]([C@H](C)CCCC(C)C)[C@@]1(C)CC2 HVYWMOMLDIMFJA-DPAQBDIFSA-N 0.000 title abstract description 26
- 239000004973 liquid crystal related substance Substances 0.000 title abstract description 14
- 235000012000 cholesterol Nutrition 0.000 title abstract description 13
- 239000004986 Cholesteric liquid crystals (ChLC) Substances 0.000 claims description 19
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 241001270131 Agaricus moelleri Species 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0209—Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0242—Compensation of deficiencies in the appearance of colours
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The invention provides a cholesterol liquid crystal display and a driving method thereof. The driving circuit applies a first voltage and a second voltage to the data line and the scanning line respectively in a first time section, applies a third voltage to the data line and/or a fourth voltage to the scanning line respectively in a second time section, and applies a fifth voltage and a sixth voltage to the data line and the scanning line respectively in a third time section.
Description
Technical Field
The invention relates to the technical field of displays, in particular to a cholesterol liquid crystal display and a driving method thereof.
Background
As is well known, a cholesteric liquid crystal display is generally formed by a passive matrix formed by intersecting a plurality of scanning lines (Row) and a plurality of data lines (Column), wherein each scanning line and each data line intersect to form a Pixel (Pixel), and the Pixel generates different liquid crystal transitions through voltage differences provided by the corresponding scanning line and the data line to generate different gray scales. Conventionally, a driving circuit of a cholesteric liquid crystal display applies a voltage to a scan line and a data line, and drives a pixel through a voltage difference between the scan line and the data line. FIG. 1 is a schematic diagram of the prior art of the present invention. As shown in fig. 1, the driving circuit (not shown) applies the levels V1 and V2 to the data line and the scan line respectively in the first time section t1, the voltage difference between the two voltages is V1-V2, and applies the levels V3 and V4 to the data line and the scan line respectively in the second time section t2, the voltage difference between the two voltages is V3-V4, and the pixel is driven by the voltage difference between the two voltages. Taking the actual voltage as an example: v1=10v, v2=5v, v3= -10v, v4= -5V.
Since the cholesterol lcd needs to apply a voltage to each scan line row by row during imaging, and when applying a voltage to the current scan line, the pixel of the previous imaged scan line is easily electrically disturbed due to the effects of fast voltage switching and parasitic capacitance, so that a problem of crosstalk (crosstalk) is caused.
Accordingly, a primary object of the present invention is to provide a cholesteric liquid crystal display and a driving method thereof to solve the above-mentioned problems.
Disclosure of Invention
The present invention provides a cholesterol liquid crystal display and a driving method thereof, which can improve color shift or crosstalk (cross talk) caused by electrical interference of a current scanning line to pixels of a previous scanning line when the scanning lines are turned on row by row, and improve user experience.
To achieve at least one of the advantages and other advantages, an embodiment of the present invention provides a driving method of a cholesteric liquid crystal display, which is suitable for a cholesteric liquid crystal display, the cholesteric liquid crystal display having scan lines, data lines, and pixels, the driving method comprising: applying a first voltage and a second voltage to the data line and the scanning line respectively in the first time section; applying a third voltage to the data line and/or a fourth voltage to the scan line in the second time section; applying a fifth voltage and a sixth voltage to the data line and the scan line respectively in the third time section; the first voltage and the second voltage are high, the sixth voltage and the fifth voltage are low, the third voltage and the fourth voltage are between the high and the low, and the pixel is driven by the voltage difference applied to the scanning line and the data line.
To achieve at least one of the advantages and other advantages, another embodiment of the invention provides a cholesterol liquid crystal display, which includes a driving circuit, a scanning line, a data line and a pixel. The scanning line and the data line are electrically connected to the driving circuit, and the pixels are electrically connected to the scanning line and the data line. The driving circuit applies a first voltage and a second voltage to the data line and the scanning line respectively in a first time section, applies a third voltage to the data line and/or a fourth voltage to the scanning line respectively in a second time section, applies a fifth voltage and a sixth voltage to the data line and the scanning line respectively in a third time section, the first voltage and the second voltage are at high levels, the sixth voltage and the fifth voltage are at low levels, the levels of the third voltage and the fourth voltage are between the high level and the low level, and the pixel is driven by a voltage difference applied to the scanning line and the data line.
In some embodiments, the third voltage is substantially equal to the fourth voltage.
In some embodiments, the third voltage is substantially different from the fourth voltage.
In some embodiments, the first time period is substantially equivalent to the third time period, and the second time period is no more than 20% of the first time period.
Therefore, by using the third voltage applied to the data line and/or the fourth voltage applied to the scan line, the cholesterol liquid crystal display and the driving method thereof can improve the voltage interference to the pixels of the previous scan line caused by the rapid charge conversion when the scan line is continuously turned on, thereby improving the color cast or crosstalk (cross talk) problem of the traditional cholesterol liquid crystal display.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well.
Drawings
For a clearer description of embodiments of the invention or of the solutions of the prior art, the drawings that are needed in the description of the embodiments or of the prior art will be briefly described, it being obvious that the drawings in the description below are some embodiments of the invention, and that other drawings can be obtained from them without inventive effort for a person skilled in the art; the positional relationships described in the drawings in the following description are based on the orientation of the elements shown in the drawings unless otherwise specified.
FIG. 1 is a schematic diagram of the prior art of the present invention;
FIG. 2 is a schematic diagram of a cholesteric liquid crystal display in accordance with an embodiment of the invention;
FIG. 3 is a schematic diagram of waveforms of scan lines, data lines and pixels according to an embodiment of the present invention;
FIG. 4 is a flow chart of a method for driving a cholesteric liquid crystal display in accordance with an embodiment of the invention.
Reference numerals:
200: cholesterol liquid crystal display
20: driving circuit
21: data line
22: scanning line
23: pixel arrangement
t1 to t4: first to fourth time zones
V1-V8: first to eighth voltages
401 to 403: step (a)
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention; the technical features designed in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other; all other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center," "lateral," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or components referred to must have a specific orientation or be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more. In addition, the term "comprising" and any variations thereof are meant to be "at least inclusive".
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between the two components. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
FIG. 2 is a schematic diagram of a cholesteric liquid crystal display in accordance with an embodiment of the invention. As shown in fig. 2, the cholesteric liquid crystal display 200 includes a driving circuit 20, a scanning line 21, a data line 22, and a pixel 23. It should be noted that the cholesteric liquid crystal display 200 shown in fig. 2 further includes a plurality of scan lines 21 and data lines 22 and a plurality of pixels 23 formed by intersecting the scan lines and the data lines, and only one pixel is shown in the embodiment.
FIG. 3 is a schematic waveform diagram of scan lines, data lines and pixels according to an embodiment of the present invention. Referring to fig. 2 and 3, the driving circuit 20 applies a first voltage V1 and a second voltage V2 to the data line 21 and the scan line 22 respectively in a first time period t1, applies a third voltage V3 and a fourth voltage V4 to the data line 21 and the scan line 22 respectively in a second time period t2, and applies a fifth voltage V5 and a sixth voltage V6 to the data line 21 and the scan line 22 respectively in a third time period t 3. The first voltage V1 and the second voltage V2 are high, the sixth voltage V6 and the fifth voltage V5 are low, the third voltage V3 and the fourth voltage V4 are between the high and the low, and the pixel 23 is driven by the voltage difference applied to the data line 21 and the scan line 22. For example, v1=10v, v2=5v, v3=v4=0v, v5= -10V, v6= -5V. In the present embodiment, the driving circuit 20 further applies the seventh voltage V7 and the eighth voltage V8 to the data line 21 and the scan line 22 respectively in a fourth time period t 4.
With reference to fig. 3, when voltages are applied to the data line 21 and the scan line 22 according to the above method, waveforms of the corresponding pixels 23 are shown in the lower part of fig. 3, it can be seen that when the pixels 23 are in the second time period t2, a turning level appears in the middle of the transition from the high level to the low level due to the third voltage V3 and the fourth voltage V4 respectively applied to the data line 21 and the scan line 22, and the turning level can generate a buffering effect between the voltage changes, thereby reducing the voltage interference to the pixels in the imaged area. Although the embodiment is described above in detail, it is known by those skilled in the art that at least one of the third voltage V3 and the fourth voltage V4 can be applied to the corresponding data line/scan line at the second time, and the corresponding voltage can be applied to the data line/scan line at least one of the time sections t2 and t4 according to the above-mentioned method, so long as the pixel voltage can be turned from the high level to the low level and/or from the low level to the high level, so as to achieve the effect of the present invention.
It should be noted that, in the embodiment of the present invention, the third voltage V3 and the fourth voltage V4 may be substantially the same level (e.g. 0V) as shown in fig. 3, but may be substantially different levels in other embodiments, so long as the logic levels of the two voltages are between the high level and the low level. Similarly, the seventh voltage V7 and the eighth voltage V8 may be substantially the same level (e.g., 0V) as shown in fig. 3, but may be substantially different levels in other embodiments, so long as the logic levels thereof are between the high level and the low level.
It should be noted that, in the embodiment of the present invention, the first time section t1 is substantially equal to the third time section t3, and the second time section t2 is not more than 20% of the first time section t 1. For example, as shown in fig. 3, the first time period t1 and the third time period t3 are each 5 time units, and the second time period t2 is not more than 1 time unit.
FIG. 4 is a flow chart of a method for driving a cholesteric liquid crystal display in accordance with an embodiment of the invention. As shown in FIG. 4, the method for driving a cholesteric liquid crystal display according to an embodiment of the invention includes steps 401-404. The driving method of the cholesterol liquid crystal display according to an embodiment of the invention is suitable for the cholesterol liquid crystal display shown in fig. 2. Step 401: the first voltage and the second voltage are respectively applied to the scanning line and the data line in the first time section. Step 402: and applying a third voltage and a fourth voltage to the scanning line and the data line respectively in the second time section. Step 403: and applying a fifth voltage and a sixth voltage to the scanning line and the data line respectively in the third time section, wherein the first voltage and the second voltage are high-level, the sixth voltage and the fifth voltage are low-level, and the levels of the third voltage and the fourth voltage are between the high-level and the low-level.
In summary, by increasing the imaging period time in the non-full-width refresh mode, the driving method of the cholesterol liquid crystal display provided by the invention can obtain more energy required by rotation of the liquid crystal, so that the color difference problem generated in the full-width and non-full-width refresh modes can be improved, and better use experience is brought to users.
In addition, it should be understood by those skilled in the art that although many problems exist in the prior art, each embodiment or technical solution of the present invention may be modified in only one or several respects, without having to solve all technical problems listed in the prior art or the background art at the same time. Those skilled in the art will understand that nothing in one claim should be taken as a limitation on that claim.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (8)
1. A driving method of a cholesteric liquid crystal display, which is applicable to a cholesteric liquid crystal display having a scanning line, a data line, and a pixel, the driving method comprising:
applying a first voltage and a second voltage to the data line and the scan line respectively in a first time section;
applying a third voltage to the data line and/or a fourth voltage to the scan line in a second time section; and
applying a fifth voltage and a sixth voltage to the data line and the scan line respectively in a third time section;
the first voltage and the second voltage are high, the sixth voltage and the fifth voltage are low, the third voltage and the fourth voltage are between the high and the low, and the pixel is driven by the voltage difference applied to the scan line and the data line.
2. The driving method of claim 1, wherein the third voltage is substantially equal to the fourth voltage.
3. The driving method of claim 1, wherein the third voltage is substantially different from the fourth voltage.
4. The driving method of claim 1, wherein the first time segment is substantially equivalent to the third time segment and the second time segment is no more than 20% of the first time segment.
5. A cholesteric liquid crystal display, comprising:
a driving circuit;
the scanning line is electrically connected with the driving circuit;
the data line is electrically connected with the driving circuit; and
the pixel is electrically connected with the scanning line and the data line;
the driving circuit applies a first voltage and a second voltage to the data line and the scanning line respectively in a first time section, applies a third voltage to the data line and/or a fourth voltage to the scanning line respectively in a second time section, applies a fifth voltage and a sixth voltage to the data line and the scanning line respectively in a third time section, the first voltage and the second voltage are at high levels, the sixth voltage and the fifth voltage are at low levels, the levels of the third voltage and the fourth voltage are between the high levels and the low levels, and the pixel is driven by a voltage difference applied to the scanning line and the data line.
6. The cholesteric liquid crystal display of claim 5, wherein the third voltage is substantially equal to the fourth voltage.
7. The cholesteric liquid crystal display of claim 5, wherein the third voltage is substantially different from the fourth voltage.
8. The cholesteric liquid crystal display of claim 5, wherein the first time period is substantially equivalent to the third time period, and the second time period is no more than 20% of the first time period.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210811521.XA CN115064136B (en) | 2022-07-11 | 2022-07-11 | Cholesterol liquid crystal display and driving method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210811521.XA CN115064136B (en) | 2022-07-11 | 2022-07-11 | Cholesterol liquid crystal display and driving method thereof |
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| Publication Number | Publication Date |
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| CN115064136A CN115064136A (en) | 2022-09-16 |
| CN115064136B true CN115064136B (en) | 2024-01-26 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101290438A (en) * | 2007-04-20 | 2008-10-22 | 群康科技(深圳)有限公司 | LCD device |
| CN102622976A (en) * | 2011-02-01 | 2012-08-01 | 财团法人工业技术研究院 | Bistable active matrix display device and driving method of display panel thereof |
| US9217902B1 (en) * | 2014-09-29 | 2015-12-22 | Shenzhen China Star Optoelectronics Technology Co., Ltd | Array substrate and liquid crystal display panel |
| CN114360465A (en) * | 2021-12-27 | 2022-04-15 | 厦门天马微电子有限公司 | Liquid crystal display device and driving method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6812913B2 (en) * | 2000-02-17 | 2004-11-02 | Minolta Co., Ltd. | Liquid crystal display driving method and liquid crystal display device |
| US6954195B2 (en) * | 2000-03-01 | 2005-10-11 | Minolta Co., Ltd. | Liquid crystal display device having a liquid crystal display driven by interlace scanning and/or sequential scanning |
| JP2001281618A (en) * | 2000-03-31 | 2001-10-10 | Minolta Co Ltd | Liquid crystal display device |
| TW201042604A (en) * | 2009-05-19 | 2010-12-01 | Ind Tech Res Inst | Display and driving method |
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2022
- 2022-07-11 CN CN202210811521.XA patent/CN115064136B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101290438A (en) * | 2007-04-20 | 2008-10-22 | 群康科技(深圳)有限公司 | LCD device |
| CN102622976A (en) * | 2011-02-01 | 2012-08-01 | 财团法人工业技术研究院 | Bistable active matrix display device and driving method of display panel thereof |
| US9217902B1 (en) * | 2014-09-29 | 2015-12-22 | Shenzhen China Star Optoelectronics Technology Co., Ltd | Array substrate and liquid crystal display panel |
| CN114360465A (en) * | 2021-12-27 | 2022-04-15 | 厦门天马微电子有限公司 | Liquid crystal display device and driving method thereof |
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| CN115064136A (en) | 2022-09-16 |
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