WO2019037294A1 - 液晶显示装置驱动方法 - Google Patents
液晶显示装置驱动方法 Download PDFInfo
- Publication number
- WO2019037294A1 WO2019037294A1 PCT/CN2017/111202 CN2017111202W WO2019037294A1 WO 2019037294 A1 WO2019037294 A1 WO 2019037294A1 CN 2017111202 W CN2017111202 W CN 2017111202W WO 2019037294 A1 WO2019037294 A1 WO 2019037294A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- voltage
- pixel
- liquid crystal
- sub
- display device
- Prior art date
Links
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
- G09G3/3607—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 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
-
- 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
- G09G3/3696—Generation of voltages supplied to electrode drivers
Definitions
- the present application relates to a liquid crystal display device driving method, and more particularly to a technique for improving gamma characteristics of different viewing angles of a liquid crystal display device.
- a liquid crystal display device is a flat display device having advantages of high resolution, thin shape, light weight, and low power consumption, and in recent years, along with improvement in display performance, improvement in productivity, and price competition for other display devices. The strength of the market has increased rapidly.
- a typical twisted nematic (liquid crystal display) liquid crystal display device of the prior art can make the long axis of liquid crystal molecules having positive dielectric anisotropy approximately parallel to the substrate surface, and further perform orientation processing.
- the long axis of the liquid crystal molecules is twisted approximately 90 degrees between the upper and lower substrates in the thickness direction of the liquid crystal layer.
- the liquid crystal molecules recover in parallel with the electric field, and the twist orientation (torsion orientation) is released.
- the liquid crystal display device of the ⁇ mode controls the amount of light transmission by utilizing a change in the optical rotatory property accompanying the change in the orientation of the liquid crystal molecules according to the voltage.
- the liquid crystal display device of the ⁇ mode has a large production margin and excellent productivity.
- the display surface of the liquid crystal display device of the cymbal type is viewed from an oblique direction, the contrast of the display is remarkably lowered, and when an image of a plurality of gradations from black to white is observed from the oblique direction as viewed from the oblique direction, The difference in luminance between gray levels becomes a significant problem.
- the grayscale characteristics of the display are reversed, and a darker phenomenon (so-called grayscale inversion phenomenon) is observed from a diagonally observing portion.
- the ⁇ characteristic is a gradation dependence indicating luminance, and the ⁇ characteristic is different in the front direction and the oblique direction. Since the gradation display state differs depending on the viewing direction, there is a problem particularly in the case of displaying an image such as a photograph or when displaying a television broadcast or the like. The problem of the viewing angle dependence of the ⁇ characteristic is more remarkable than the IPS method in the M VA mode and the ASM mode. On the one hand, compared with the MVA method or the ASM method, the IPS method is difficult to produce a panel with a high contrast and a high contrast. From this point of view, it is particularly desirable to improve the viewing angle dependency technical problem of the ⁇ characteristic in the MVA mode or the ASM mode liquid crystal display device.
- the present application provides a liquid crystal display device driving method which improves the ⁇ characteristics of different viewing angles of the conventional liquid crystal display device.
- an embodiment of the present application provides a liquid crystal display device including a liquid crystal layer, which is divided into a plurality of pixels and displayed in a normally black manner, and the plurality of pixels have a plurality of electrodes that apply a voltage on the liquid crystal layer.
- Each pixel of the plurality of pixels includes a first sub-pixel and a second sub-pixel, and respective voltages are applied to the liquid crystal layer of each pixel; each pixel of the plurality of pixels is displayed in a gray scale gk ⁇ ,
- each of the plurality of pixels further includes a third sub-pixel, the third sub-pixel being different from the first sub-pixel and the second sub-pixel; each of the plurality of pixels being at a display gray level gk ⁇
- the first sub-pixel includes a first transistor electrically connected to the first source line
- the second sub-pixel includes a second transistor electrically connected to the second source line, the first source line Parallel to the second source line, respectively Providing a voltage signal of each of the first sub-pixel and the second sub-pixel; the first transistor and the second transistor are electrically connected to the gate line to provide the same scan signal of the first sub-pixel and the second sub-pixel.
- the gray level n with the highest brightness is 256.
- the predetermined gray level gs is 128.
- the plurality of pixels are pixels of a matrix type.
- Embodiments of the present application provide a liquid crystal display device including a liquid crystal layer, which is divided into a plurality of pixels and displayed in a normally black manner, and a plurality of pixels have a plurality of electrodes for applying a voltage on the liquid crystal layer, and a plurality of pixels
- Each pixel includes a first sub-pixel and a second sub-pixel, and a respective voltage is applied to the liquid crystal layer of each pixel; each pixel of the plurality of pixels is displayed at the first gray level gk ⁇
- each of the plurality of pixels further includes a third sub-pixel, the third sub-pixel being different from the first sub-pixel and the second sub-pixel; each of the plurality of pixels being at a display gray level gk ⁇
- the first sub-pixel includes a first transistor electrically connected to the first source line
- the second sub-pixel includes a second transistor electrically connected to the second source line, the first source line
- a second source line is disposed in parallel, respectively providing a voltage signal of each of the first sub-pixel and the second sub-pixel; the first transistor and the second transistor are electrically connected to the gate line, and the first sub-pixel and the second sub-pixel are provided
- the pixels have the same scan signal.
- the gray level n with the highest brightness is 256.
- the predetermined gray level gs is 128.
- the plurality of pixels are pixels of a matrix type.
- Embodiments of the present application provide a liquid crystal display device including a liquid crystal layer, which is divided into a plurality of pixels and displayed in a normally black manner, and a plurality of pixels have a plurality of electrodes, a plurality of pixels, on which a voltage is applied on the liquid crystal layer.
- Each pixel includes a first sub-pixel and a second sub-pixel, and a respective voltage is applied to the liquid crystal layer of each pixel; each pixel of the plurality of pixels is displayed at the first gray level gk ⁇
- each of the plurality of pixels further includes a third sub-pixel, the third sub-pixel being different from the first sub-pixel and the second sub-pixel; each of the plurality of pixels being at a display gray level gk ⁇
- the first sub-pixel includes a first transistor electrically connected to the first source line
- the second sub-pixel includes a second transistor electrically connected to the second source line, the first source line
- a second source line is disposed in parallel, respectively providing a voltage signal of each of the first sub-pixel and the second sub-pixel; the first transistor and the second transistor are electrically connected to the gate line, and the first sub-pixel and the second sub-pixel are provided
- the pixels have the same scan signal.
- the gray level n with the highest brightness is 256.
- the predetermined gray level gs is 128.
- Embodiments of the present application provide a liquid crystal display device driving method.
- the liquid crystal display device driving method further includes: the first source line and the second source line respectively provide voltage signals of the first sub-pixel and the second sub-pixel; the gate line provides the first sub-pixel and The second sub-pixel is the same scan signal.
- the voltage V1 (gk) is less than the predetermined voltage Vs ⁇
- the voltage V1 (gk) and the voltage V2 (gk) are applied such that AV12(gk)>0 volts, and AV12(gk) > AV12 is satisfied
- the relationship of gk+l when the voltage is Vl(gk) is equal to or greater than the predetermined voltage Vs ⁇ , let V1(gk) ⁇ V2(gk) make AV12(gk) ⁇ 0 volt, and satisfy AV12(gk) ⁇ AV12( Gk+l) relationship.
- the gray level n with the highest brightness is 256.
- the predetermined gray level gs is 128.
- the plurality of pixels are pixels of a matrix type.
- Embodiments of the present application provide a liquid crystal display device driving method
- the liquid crystal display device includes a liquid crystal layer, which is divided into a plurality of pixels and each pixel includes a first sub-pixel and a second sub-pixel, and the plurality of pixels have a plurality of electrodes to which a voltage is applied on the liquid crystal layer;
- V1 (gk) and the voltage V3 (gk) are applied such that AV13(gk) > 0 volts is satisfied and satisfied AV12(gk)>AV13(gk) relationship
- the liquid crystal display device driving method further includes: the first source line and the second source line respectively provide voltage signals of the first sub-pixel and the second sub-pixel; the gate line provides the first sub-pixel and The second sub-pixel is the same scan signal.
- the gray level n with the highest brightness is 256.
- the predetermined gray level gs is 128.
- the plurality of pixels are pixels of a matrix type.
- Embodiments of the present application provide a liquid crystal display device driving method
- the liquid crystal display device includes a liquid crystal layer, which is divided into a plurality of pixels and each pixel includes a first sub-pixel and a second sub-pixel, and the plurality of pixels have a plurality of electrodes to which a voltage is applied on the liquid crystal layer;
- the display gray scale gk is smaller than the predetermined gray scale gs ⁇ , the voltage V1 (gk) and the voltage V2 (
- the liquid crystal display device driving method further includes applying a voltage V3 (gk) different from the first sub image
- the liquid crystal display device driving method further includes: the first source line and the second source line respectively provide voltage signals of the first sub-pixel and the second sub-pixel; the gate line provides the first sub-pixel and The second sub-pixel is the same scan signal.
- the gray level n with the highest brightness is 256.
- the predetermined gray level gs is 128.
- the present application provides a liquid crystal display device and a driving method thereof, which improve gamma characteristics of a liquid crystal display device at different viewing angles by applying respective voltages to sub-pixels, thereby improving display quality.
- the present application provides different applied voltage conditions in displaying different gray levels, which can improve the driving process and improve the driving efficiency of the liquid crystal display device.
- FIG. 1 is a schematic diagram of a liquid crystal display device according to an embodiment of the present application.
- FIG. 2 is a schematic diagram of a pixel of a liquid crystal display device according to an embodiment of the present application.
- 3a, 3b are schematic diagrams showing a state of voltage application in an embodiment of the present application
- 4 is a schematic diagram of another pixel of a liquid crystal display device according to an embodiment of the present application
- FIG. 5 is a flowchart of a driving method of a liquid crystal display device according to an embodiment of the present application.
- 6a, 6b are schematic diagrams showing another state of applying voltage in an embodiment of the present application.
- FIG. 7 is a flowchart of another method for driving a liquid crystal display device according to an embodiment of the present application.
- FIGS. 8a and 8b are schematic diagrams showing another state of applying a voltage in an embodiment of the present application.
- FIG. 9 is a flow chart of another method for driving a liquid crystal display device according to an embodiment of the present application.
- a liquid crystal display device 10 includes a plurality of pixels P arranged in a matrix, and each of the pixels P has a substrate 10
- the liquid crystal layer 11 is provided on the upper surface, and the liquid crystal display device 100 is displayed in a normally black manner.
- the electric field formed by the pixel electrode and the common electrode 13 of the liquid crystal layer 11 changes the twist direction of the liquid crystal molecules, thereby changing the light transmittance of the liquid crystal display device 100.
- the pixel electrode includes a first electrode 12a and a second electrode 12b disposed between the substrate 10 and the liquid crystal layer 11.
- the first electrode 12a and the common electrode 13 apply a voltage to the first sub-pixel P1 of the pixel P, and the second electrode 12b and the common electrode 13 apply a voltage to the second sub-pixel P2 of the pixel P. Since the first electrode 12a and the second electrode 12b can apply different voltages, among each of the pixels P, the liquid crystals of different sub-pixels can be controlled to have different degrees of steering, and therefore, for different viewing angles, the liquid crystal display device 100 The gamma characteristic is improved.
- a liquid crystal display can form a matrix type pixel by a gate line disposed in parallel and a source line arranged in parallel. That is, the area of each pixel ⁇ can be divided into a first sub-pixel P1 and a second sub-pixel ⁇ 2.
- the first sub-pixel P1 includes a first electrode 12a and a first transistor T1.
- the first electrode 12a is electrically connected to the first source line SL1 through the first transistor T1
- the second sub-pixel P2 includes the second electrode 12b and The second transistor T2
- the second electrode 12b is electrically connected to the second source line SL2 through the second transistor T2
- the first source line SL1 and the second source line SL2 are arranged in parallel
- the respective voltage signals of the first sub-pixel PI and the second sub-pixel P2 are respectively provided.
- the first transistor T1 and the second transistor T2 are electrically connected to the same gate line GL, and the same scan signal is provided by the gate line GL for the first sub-pixel PI and the second sub-pixel P2.
- the control chip connecting the gate line and the source line can send the same scan signal to the pixel P via the gate line GL, and is respectively composed of the first source line SL1 and the
- the second source line SL2 sends out respective voltage signals such that the first electrode 12a and the second electrode 12b can apply different voltages to the liquid crystal layer of the pixel.
- FIG. 3a and 3b are schematic diagrams showing a state of voltage application in an embodiment of the present application.
- the horizontal axis is the first voltage V1 (gk) applied to the first pixel
- the vertical axis is applied to the second pixel.
- the gray level of the pixel display, n represents the gray level with the highest brightness, for example, n can be 256.
- the first voltage V1 (gk) and the second voltage V2 (gk) are applied as shown in the figure.
- AV12(gk) > 0 volts is set.
- the first voltage V1(gk) is controlled to be equal to the second voltage V2(gk) such that the voltage difference AV12(gk) of the first voltage V1(gk) and the second voltage V2(gk) is 0,
- the gray level gk is increased, the voltage difference AV12(gk) of the first voltage V1(gk) and the second voltage V2(gk) remains unchanged.
- the horizontal axis is the first voltage V1(gk) applied to the first pixel
- the vertical axis is the second voltage V2(gk) applied to the second pixel
- 0 ⁇ gk ⁇ n, gk and n are integers of 0 or more
- gk is the gradation level of the pixel display of the liquid crystal display device
- n is the gradation level of the highest luminance,
- n can be 256.
- the first voltage V1 (gk) and the second voltage V2 (gk) are applied as shown in the figure.
- the AV12(gk)>0 volt is set, and the AV12 is satisfied.
- (gk) the relationship of AV12(gk+l), that is, in the case where the gradation level gk is between 0 and gs, the first voltage V1(gk) is greater than the second voltage V2(gk), and the gradation is in grayscale
- the voltage difference AV12 (gk) of the first voltage V1 (gk) and the second voltage V2 (gk) remains unchanged.
- the first voltage V1(gk) is controlled to be equal to the second voltage V2(gk) such that the voltages of the first voltage V1(gk) and the second voltage V2(gk)
- the difference AV12 (gk) is 0, and the voltage difference AV12 (gk) of the first voltage V1 (gk) and the second voltage V2 (gk) is maintained constant as the gray level gk is increased.
- the predetermined predetermined gradation level gs can be determined by the magnitude of the corresponding applied voltage.
- the liquid crystal display device can be controlled in accordance with the applied voltage state shown in Figs. 3a, 3b.
- the first voltage applied to the first sub-pixel and the second voltage applied to the second sub-pixel can be controlled such that the gradation is low, an appropriate voltage difference can be provided, and the liquid crystal display device is improved.
- the gamma characteristic of the viewing angle when the displayed gray level reaches a predetermined gray level ⁇ , for example, when the predetermined gray level gs is greater than 128 ⁇ , the voltages applied by the first sub-pixel and the second sub-pixel are equal, and the switching of different voltage signals is reduced. Control program to improve the driving efficiency of the liquid crystal display device.
- the liquid crystal display can be formed into a matrix type by parallelly disposed gate lines and source lines arranged in parallel.
- the pixel P, the area of each pixel P can be divided into a first sub-pixel PI, a second sub-pixel P2, and a third sub-pixel P3.
- the first sub-pixel P1 includes a first electrode 12a and a first transistor T1.
- the first electrode 12a is electrically connected to the first source line SL1 through the first transistor ⁇ 1, and the second sub-pixel P2 includes the second electrode 12b.
- the second transistor T2 the second electrode 12b is electrically connected to the second source line SL2 through the second transistor ⁇ 2
- the third sub-pixel P3 includes the third electrode 12c and the third transistor T3, and the third electrode 12c passes the
- the third transistor ⁇ 3 is electrically connected to the second source line S L2 , the first source line SL1 and the second source line SL2 are disposed in parallel, and the first source line SL1 provides the first sub-pixel P1 voltage signal, and the second source Line SL2 provides a second sub-pixel P2 voltage signal.
- first transistor T1 and the second transistor T2 are electrically connected to the first gate line GL1, and the first sub-pixel P1 and the second sub-pixel P2 are provided with the same scan signal by the first gate line GL1, and the third transistor T3 is electrically connected to the second gate line GL2, and the third sub-pixel P3 scan signal is supplied from the second gate line GL2.
- the control chip connecting the gate line and the source line can send a scan signal to the pixel P via the first gate line GL1 and the second gate line GL2, and respectively
- the first source line SL1 and the second source line SL2 send respective voltage signals such that the first electrode 12a, the second electrode 12b, and the third electrode 12c can apply different voltages to the liquid crystal layer of the pixel.
- the display gradation level gk is smaller than the predetermined gradation level gs ⁇
- AV13(gk)>0 volts is set, and the relationship of ⁇ 2 (gk)>AV13(gk) is satisfied, that is, the gradation level gk is at 0 and gs.
- the voltage difference AV12(gk) of the first voltage V1(gk) and the second voltage V2(gk) is greater than the first sub-portion
- the voltage difference AV12(gk) and AV13(gk) are equal.
- the sub-pixel dividing method may divide the second sub-pixel P2 and the third sub-pixel P3 into the same area, but the present application is not limited thereto, and each pixel may be divided into three or more sub-pixels, and according to the division. The amount is designed to occupy the area of each sub-pixel. However, the more sub-pixels are divided, the more control circuitry is required to provide different applied voltages. Therefore, the display quality required for the visible liquid crystal display device provides an appropriate number of sub-pixel divisions and locations.
- FIG. 5 is a flow chart of a method for driving a liquid crystal display device according to an embodiment of the present invention.
- a liquid crystal display device driving method is applied to the liquid crystal display device of FIGS. 1 and 2, including a liquid crystal layer 11, each The pixel P includes a first sub-pixel P1 and a second sub-pixel P2, and a voltage signal of each of the first sub-pixel P1 and the second sub-pixel P2 is respectively supplied from the first source line SL1 and the second source line SL2, and passes through The gate line GL supplies the same scan signal of the first sub-pixel P1 and the second sub-pixel P2, and further applies a voltage to the first pixel P1 on the liquid crystal layer 11 through the first electrode 12a and on the liquid crystal layer 11 through the second electrode 12b.
- the second pixel P2 applies a voltage.
- the liquid crystal display device driving method includes the following steps (S01-S04):
- Step S01 applying a first voltage V1(gk) at the first sub-pixel and applying a second voltage V2(gk) at the second sub-pixel;
- Step S02 determining whether the display display gray level gk is smaller than the predetermined gray level gs; as in the previous embodiment, determining whether the gray level is less than the predetermined gray level gs in step S02 may also apply the first voltage through comparison. Whether or not V1(gk) reaches the voltage value Vs(gs) corresponding to the predetermined gradation level gs is judged.
- step S03 apply the first voltage V1 (gk) and the second voltage V2 (gk) such that AV12(gk) > 0 volts, and satisfy the relationship of AV12(gk) > AV12(gk+l) ;
- FIG. 6a and 6b are schematic diagrams showing another state of applied voltage in an embodiment of the present application.
- the horizontal axis is the first voltage V1 (gk) applied to the first pixel
- the vertical axis is applied to
- gk is The gradation level of the pixel display of the liquid crystal display device, n represents the gradation level with the highest brightness, for example, n may be 256.
- the first voltage V1 (gk) and the second voltage V2 (gk) are applied as shown in the figure.
- the AV12(gk)>0 volt is set, and the AV12 is satisfied.
- the voltage difference AV12 (gk) of the first voltage V1 (gk) and the second voltage V2 (gk) is gradually lowered.
- the control first voltage V1(gk) is smaller than the second voltage V2(gk) such that the voltage difference AV12(gk) of the first voltage V1(gk) and the second voltage V2(gk) is less than 0
- the voltage difference ⁇ 12 (gk) of the first voltage V1 (gk) and the second voltage V2 (gk) gradually increases.
- the horizontal axis is the first voltage V1(gk) applied to the first pixel
- the vertical axis is the second voltage V2(gk) applied to the second pixel
- the first voltage V1 (gk) and the second voltage V2 (gk) are applied as shown in the figure.
- the control first voltage V1(gk) is smaller than the second voltage V2(gk) such that the voltage difference AV12(gk) of the first voltage V1(gk) and the second voltage V2(gk) is less than 0,
- the voltage difference AV12 (gk) of the first voltage V1 (gk) and the second voltage V2 (gk) remains unchanged.
- the predetermined predetermined gradation level gs can be determined by the magnitude of the corresponding applied voltage.
- the liquid crystal display device can be controlled in accordance with the applied voltage state shown in Figs. 6a, 6b.
- the first voltage applied to the first sub-pixel and the second voltage applied to the second sub-pixel can be controlled such that the gradation is low, an appropriate voltage difference can be provided, and the liquid crystal display device is improved.
- the gamma characteristic of the viewing angle when the displayed gradation level reaches a predetermined gradation level ⁇ , for example, when the predetermined gradation level gs is greater than 128 ⁇ , the voltage applied by the first sub-pixel is less than the voltage applied by the second sub-pixel, by applying the change The state of the voltage enhances the display effect of the liquid crystal display device.
- a third voltage V3 is applied to the third sub-pixel ( Gk), when the display gradation level gk is smaller than the predetermined gradation level gs ⁇ , satisfies AV13(gk)>0 volt, and satisfies the relationship of AV12(gk)>AV13(gk).
- FIG. 7 is a flow chart of another method for driving a liquid crystal display device according to an embodiment of the present invention.
- a liquid crystal display device driving method is applied to the liquid crystal display device of FIGS. 1 and 2, including a liquid crystal layer 11.
- Each pixel P includes a first sub-pixel P1 and a second sub-pixel P2, and respective voltage signals of the first sub-pixel P1 and the second sub-pixel P2 are respectively provided by the first source line SL1 and the second source line SL2.
- the liquid crystal display device driving method includes the following steps (S11-S14):
- Step S11 applying a first voltage V1(gk) at the first sub-pixel and applying a second voltage V2(gk) at the second sub-pixel;
- Step S12 determining whether the display display gray level gk is smaller than a predetermined gray level gs; Similarly, whether or not the gradation level is smaller than the predetermined gradation level gs in step S12 can also be determined by comparing whether the applied first voltage V1(gk) reaches the voltage value Vs(gs) corresponding to the predetermined gradation level gs.
- step S13 apply voltage Vl(gk) and voltage V2(gk) such that AV12(gk)>0 volts, and satisfy the relationship of AV12(gk)>AV12(gk+l);
- step S14 set Vl(gk) ⁇ V2(gk) such that AV12(gk) ⁇ 0 volts
- Vl(gk) ⁇ V3(gk) is set such that AV13(gk) ⁇ 0 volts and satisfies AV12(gk)
- FIG. 8a and 8b are schematic diagrams showing another state of applied voltage in an embodiment of the present application.
- the horizontal axis is the first voltage V1 (gk) applied to the first pixel
- the vertical axis is applied to
- n represents the gradation level with the highest brightness, for example, n may be 256.
- the first voltage V1 (gk) and the second voltage V2 (gk) are applied as shown in the figure.
- the AV12(gk)>0 volt is set, and the AV12 is satisfied.
- the voltage difference AV12 (gk) of the first voltage V1 (gk) and the second voltage V2 (gk) is gradually lowered.
- the display gradation level gk is equal to or greater than the predetermined gradation level gs ⁇ , let ⁇ V12(gk) ⁇ 0 volts, and satisfy the relationship of AV12(gk) ⁇ AV12(gk+l), that is, the gradation level gk is in gs
- the control second voltage V2(gk) remains unchanged, and the voltage difference AV12(gk) of the first voltage V1(gk) and the second voltage V2(gk) is greater than 0, at the gray level gk
- the voltage difference AV12(gk) of the first voltage V1 (gk) and the second voltage V2 (gk) is gradually decreased.
- the horizontal axis is the first voltage V1(gk) applied to the first pixel
- the vertical axis is the second voltage V2(gk) applied to the second pixel
- gk and n are integers of 0 or more, gk is the gradation level of the pixel display of the liquid crystal display device, and n is the gradation level having the highest luminance, for example, n may be 256.
- the first voltage V1 (gk) and the second voltage V2 (gk) are applied as shown in the figure.
- AV12(gk)>0 volt is set, and AV12 is satisfied.
- (gk) the relationship of AV12(gk+l), that is, in the case where the gradation level gk is between 0 and gs, the first voltage V1(gk) is greater than the second voltage V2(gk), and the gradation is in grayscale
- the voltage difference AV12 (gk) of the first voltage V1 (gk) and the second voltage V2 (gk) remains unchanged.
- the display gradation level gk is equal to or larger than the predetermined gradation level gs ⁇ , let AV12(gk)>0 volt, and satisfy the relationship of AV12(gk) ⁇ AV12(gk+l), that is, the gradation level gk is in gs and
- the second voltage V2 (gk) is controlled to remain unchanged, and the voltage difference AV12(gk) of the first voltage V1(gk) and the second voltage V2(gk) is greater than 0, and the gray level gk is increased. That is, the voltage difference AV12 (gk) of the first voltage V1 (gk) and the second voltage V2 (gk) gradually decreases.
- the predetermined predetermined gradation level gs can be determined by the magnitude of the corresponding applied voltage. For example, when the first voltage V1(g k) is applied to reach the voltage value Vs(gs) ⁇ corresponding to the predetermined gradation level gs, the liquid crystal display device can be controlled in accordance with the applied voltage state shown in Figs. 8a, 8b.
- the first voltage applied to the first sub-pixel and the second voltage applied to the second sub-pixel can be controlled such that the gradation is low, an appropriate voltage difference can be provided, and the liquid crystal display device is improved.
- the gamma characteristic of the viewing angle when the displayed gradation level reaches a predetermined gradation level ⁇ , for example, when the predetermined gradation level gs is greater than 128 ⁇ , the voltage applied by the second sub-pixel is unchanged, and only the voltage is applied by changing the first sub-pixel. Adjust the display status to improve the convenience of the liquid crystal display device and maintain excellent display.
- a third voltage V3 is applied to the third sub-pixel ( Gk), when the display gradation level gk is smaller than the predetermined gradation level gs ⁇ , satisfies AV13(gk)>0 volt, and satisfies the relationship of AV12(gk)>AV13(gk).
- FIG. 9 is a flow chart of another method for driving a liquid crystal display device according to an embodiment of the present invention.
- a liquid crystal display device driving method is applied to the liquid crystal display device of FIGS. 1 and 2, including a liquid crystal layer 11.
- each The pixel P includes a first sub-pixel PI and a second sub-pixel P2, and the respective voltage signals of the first sub-pixel P1 and the second sub-pixel P2 are respectively supplied from the first source line SL1 and the second source line SL2, and pass through
- the gate line GL supplies the same scan signal of the first sub-pixel P1 and the second sub-pixel P2, and further applies a voltage to the first pixel P1 on the liquid crystal layer 11 through the first electrode 12a and on the liquid crystal layer 11 through the second electrode 12b.
- the second pixel P2 applies a voltage.
- the liquid crystal display device driving method includes the following steps (S21-S24):
- Step S21 applying a first voltage V1(gk) at the first sub-pixel and applying a second voltage V2(gk) at the second sub-pixel;
- Step S22 determining whether the display display gray level gk is smaller than the predetermined gray level gs; as in the previous embodiment, determining whether the gray level is less than the predetermined gray level gs in step S22 may also apply the first voltage through comparison. Whether or not V1(gk) reaches the voltage value Vs(gs) corresponding to the predetermined gradation level gs is judged.
- step S23 apply voltage Vl(gk) and voltage V2(gk) such that AV12(gk)>0 volts and satisfy the relationship of AV12(gk) > AV12(gk+l);
- step S24 Let V2(gk) be unchanged so that AV12(gk) > 0 volts and satisfy the relationship of AV12(gk) ⁇ AV12(gk+l).
- step S23 is satisfied with AV12(gk).
- step S24 also satisfies the relationship of AV12(gk) ⁇ AV12(gk+l).
- the applied voltage control method of the third sub-pixel is added to the applied voltage control of steps S23 and S24.
- the applied voltage Vl (gk) and the voltage V3 (gk) are set such that AV13(gk) > 0 volts and the relationship of AV12(gk) > AV13(gk) is satisfied.
- V 3 (gk) be constant such that AV13(gk) > 0 volts, and satisfying AV13(gk) ⁇ AV13(gk+l) relationship.
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 (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
提供一种液晶显示装置驱动方法,液晶显示装置包括液晶层,区分为多个像素且每一象素包括第一子像素和第二子像素,液晶显示装置驱动方法,包括;多个像素的每一象素在显示灰度等级gk时,施加电压V1(gk)在第一子像素和施加电压V2(gk)在第二子像素,设ΔV12 (gk)=V1 (gk) −V2 (gk),其中,0≤ gk ≤ n,gk和n是0以上的整数,n表示亮度最高的灰度等级;在显示灰度等级gk小于预定灰度等级gs时,施加电压V1(gk)和电压V2(gk)使得ΔV12(gk)>0伏,且满足ΔV12(gk) > ΔV12(gk+1)的关系,在显示灰度等级gk等于或大于预定灰度等级gs时,设V1(gk)<V2(gk) 使得ΔV12(gk) < 0伏,且满足ΔV12(gk) ≤ΔV12(gk+1)的关系。
Description
液晶显示装置驱动方法
技术领域
[0001] 本申请涉及液晶显示装置驱动方法, 尤其涉及一种改善液晶显示装置不同视角 的 γ特性的技术。
背景技术
[0002] 液晶显示装置是具有高分辨率、 形状薄、 重量轻以及消费电力低等优点的平面 显示装置, 近年来, 伴随着显示性能的提高、 生产能力的提高以及对其它显示 装置的价格竞争力的提高, 市场规模迅速扩大。
[0003] 现有技术一般的扭转向列方式 (ΤΝ方式)的液晶显示装置可以使具有正的介电率 各向异性的液晶分子的长轴对于基板表面近似平行取向, 而且, 进行取向处理 , 使液晶分子的长轴沿液晶层的厚度方向在上下基板间近似 90度扭转。 在液晶 层上施加电压的话, 液晶分子平行电场地恢复, 解除扭曲取向 (扭转取向)。 ΤΝ 方式的液晶显示装置通过利用伴随液晶分子根据电压的取向变化的旋光性的变 化, 控制透光量。
[0004] ΤΝ方式的液晶显示装置的生产余量广阔生产率十分出色。 一方面, 有显示性 能特别是视角特性的问题。 具体说, ΤΝ方式的液晶显示装置的显示面从斜方向 观察的话, 显示的对比度显著降低, 从斜方向观察在正面观察可以明显观察到 从黑到白的多个灰度等级的图像的话, 有灰度等级间的亮度差变得显著不明显 的问题。 此外, 显示的灰度等级特性反转, 也会出现从正面观察更暗的部分从 斜方向观察更亮的现象 (所谓的灰度等级反转现象)。
[0005] 近年来, 作为改善这些 ΤΝ方式的液晶显示装置视角特性的液晶显示装置, 幵 发出共面切换方式 (IPS方式)、 多域垂直对准方式 (MVA方式)、 轴对称取向方式( ASM方式)等。 这些广视角方式的液晶显示装置中都解决了关于视角特性的上述 具体问题。 亦即, 不产生在从斜方向观察显示面的场合显示对比度显著降低、 显示灰度等级反转等问题。
[0006] 所谓 γ特性是表示亮度的灰度等级依赖性, γ特性在正面方向和斜方向不同, 因
为灰度等级显示状态根据观察方向而不同, 所以在表示照片等图像的场合, 或 者在显示电视播放等的场合, 特别会出现问题。 γ特性的视角依赖性的问题在 M VA方式和 ASM方式下比 IPS方式更显著。 一方面, IPS方式和 MVA方式或 ASM 方式相比, 很难以高的生产率生产正面观察吋对比度高的面板。 从这点出发, 特别期望改善 MVA方式和或 ASM方式的液晶显示装置中的 γ特性的视角依赖性 技术问题
[0007] 鉴于现有技术中的上述问题, 本申请提供了一种液晶显示装置驱动方法, 改善 现有液晶显示装置不同视角的 γ特性。
问题的解决方案
技术解决方案
[0008] 基于上述目的, 本申请实施例提供了一种液晶显示装置, 包括液晶层, 区分为 多个像素且以常黑方式进行显示, 多个像素具有在液晶层上施加电压的多个电 极, 多个像素的每一象素包括第一子像素和第二子像素, 在各象素的液晶层上 施加各别的电压; 多个像素的每一象素在显示灰度等级 gk吋, 施加在第一子像 素和第二子像素的各象素的液晶层上的电压为 Vl(gk)和 V2(gk), ¾AV12(gk)=Vl( gk)-V2 (gk) , 其中, 0≤gk≤n, gk和 n是 0以上的整数, n表示亮度最高的灰度等 级, 则在显示灰度等级 gk小于预定灰度等级 gs吋, 设 AV12(gk)〉0伏,
且满足 AV12(gk)>AV12(gk+l)的关系, 在显示灰度等级 gk等于或大于预定灰度等 级 gs吋, 设 AV12(gk)< 0伏, 且满足 AV12(gk)≤AV12(gk+l)的关系。
[0009] 可选地, 多个像素的每一个还包括第三子像素, 第三子像素不同于第一子像素 及第二子像素; 多个像素的每一个在在显示灰度等级 gk吋, 施加在第三子像素 的液晶层上的电压为 V3(gk), ¾AV13(gk) = Vl(gk)-V3(gk), 在显示灰度等级 gk 小于预定灰度等级 gs吋, 设 AV13(gk)〉0伏, 且满足 AV12(gk) >AV13(gk)的关系 , 在显示灰度等级 gk等于或大于预定灰度等级 gs吋, 设 AV13(gk)<0伏, 且满足 AV12(gk) = AV13(gk)的关系。
[0010] 可选地, 第一子像素包括第一电晶体, 电连接于第一源极线, 第二子像素包括 第二电晶体, 电连接于第二源极线, 第一源极线和第二源极线平行设置, 分别
提供第一子像素和第二子像素各自的电压信号; 第一电晶体和第二电晶体电连 接于栅极线, 提供第一子像素和第二子像素相同扫描信号。
[0011] 可选地, 在电压 Vl(gk)小于预定电压 Vs吋, 设 AV12(gk)〉0伏,
且满足 AV12(gk)>AV12(gk+l)的关系, 在电压为 Vl(gk)等于或大于预定电压 Vs吋
, 设 AV12(gk)<0伏, 且满足 AV12(gk)≤AV12(gk+l)的关系。
[0012] 可选地, 亮度最高的灰度等级 n为 256。 预定灰度等级 gs为 128。
[0013] 可选地, 多个像素为矩阵型的像素。
[0014] 本申请实施例提供了一种液晶显示装置, 包括液晶层, 区分为多个像素且以常 黑方式进行显示, 多个像素具有在液晶层上施加电压的多个电极, 多个像素的 每一象素包括第一子像素和第二子像素, 在各象素的液晶层上施加各别的电压 ; 多个像素的每一象素在显示灰度等级 gk吋, 施加在第一子像素和第二子像素 的各象素的液晶层上的电压为 Vl(gk)和 V2(gk), ¾AV12(gk)=Vl(gk)-V2 (gk) , 其中, 0≤gk≤n, gk和 n是 0以上的整数, n表示亮度最高的灰度等级, 则在显示灰 度等级 gk小于预定灰度等级 gs吋, 设 AV12(gk)〉0伏, 且满足 AV12(gk)
=AV12(gk+l)的关系, 在显示灰度等级 gk等于或大于预定灰度等级 gs吋, 设 Δνΐ2 (gk) < 0伏, 且满足 AV12(gk) =AV12(gk+l)的关系。
[0015] 可选地, 多个像素的每一个还包括第三子像素, 第三子像素不同于第一子像素 及第二子像素; 多个像素的每一个在在显示灰度等级 gk吋, 施加在第三子像素 的液晶层上的电压为 V3(gk), ¾AV13(gk) = Vl(gk)-V3(gk) , 在显示灰度等级 gk 小于预定灰度等级 gs吋, 设 AV13(gk)〉0伏, 且满足 AV12(gk) >AV13(gk)的关系 , 在显示灰度等级 gk等于或大于预定灰度等级 gs吋, 设 AV13(gk)<0伏, 且满足 AV12(gk) =AV13(gk)的关系。
[0016] 可选地, 第一子像素包括第一电晶体, 电连接于第一源极线, 第二子像素包括 第二电晶体, 电连接于第二源极线, 第一源极线和第二源极线平行设置, 分别 提供第一子像素和第二子像素各自的电压信号; 第一电晶体和第二电晶体电连 接于栅极线, 提供第一子像素和第二子像素相同扫描信号。
[0017] 可选地, 电压 Vl(gk)小于预定电压 Vs吋, 设 AV12(gk)〉0伏, 且满足 AV12(gk) =AV12(gk+l)的关系, 在电压为 Vl(gk)等于或大于预定电压 Vs吋, 设 AV12(gk)<0
伏, 且满足 AV12(gk) =AV12(gk+l)的关系。
[0018] 可选地, 亮度最高的灰度等级 n为 256。 预定灰度等级 gs为 128。
[0019] 可选地, 多个像素为矩阵型的像素。
[0020] 本申请实施例提供了一种液晶显示装置, 包括液晶层, 区分为多个像素且以常 黑方式进行显示, 多个像素具有在液晶层上施加电压的多个电极, 多个像素的 每一象素包括第一子像素和第二子像素, 在各象素的液晶层上施加各别的电压 ; 多个像素的每一象素在显示灰度等级 gk吋, 施加在第一子像素和第二子像素 的各象素的液晶层上的电压为 Vl(gk)和 V2(gk), 设 Δνΐ2 (gk) =Vl(gk) -V2 (gk), 其中, 0≤gk≤n, gk和 n是 0以上的整数, n表示亮度最高的灰度等级, 则在显示 灰度等级 gk小于预定灰度等级 gs吋, 设 AV12(gk)〉0伏, 且满足 AV12(gk)≥AV12( gk+1)的关系, 在显示灰度等级 gk等于或大于预定灰度等级 gs吋, 设 AV12(gk)<0 伏, 且满足 AV12(gk)=AV12(gk+l)的关系。
[0021] 可选地, 多个像素的每一个还包括第三子像素, 第三子像素不同于第一子像素 及第二子像素; 多个像素的每一个在在显示灰度等级 gk吋, 施加在第三子像素 的液晶层上的电压为 V3(gk), ¾AV13(gk) = Vl(gk)-V3(gk), 在显示灰度等级 gk 小于预定灰度等级 gs吋, 设 AV13(gk)〉0伏, 且满足 AV12(gk)>AV13(gk)的关系 , 在显示灰度等级 gk等于或大于预定灰度等级 gs吋, 设 AV13(gk)<0伏, 且满足 Δ V12(gk) = AV13(gk)的关系。
[0022] 可选地, 第一子像素包括第一电晶体, 电连接于第一源极线, 第二子像素包括 第二电晶体, 电连接于第二源极线, 第一源极线和第二源极线平行设置, 分别 提供第一子像素和第二子像素各自的电压信号; 第一电晶体和第二电晶体电连 接于栅极线, 提供第一子像素和第二子像素相同扫描信号。
[0023] 可选地, 电压 Vl(gk)小于预定电压 Vs吋, 设 AV12(gk)〉0伏, 且满足 AV12(gk) ≥AV12(gk+l)的关系, 在电压为 Vl(gk)等于或大于预定电压 Vs吋, 设 AV12(gk)<0 伏, 且满足 AV12(gk) =AV12(gk+l)的关系。
[0024] 可选地, 亮度最高的灰度等级 n为 256。 预定灰度等级 gs为 128。
[0025] 本申请实施例提供了一种液晶显示装置驱动方法, 液晶显示装置包括液晶层, 区分为多个像素且每一象素包括第一子像素和第二子像素, 多个像素具有在液
晶层上施加电压的多个电极; 液晶显示装置驱动方法, 包括; 多个像素的每一 象素在显示灰度等级 gk吋, 施加电压 Vl(gk)在第一子像素和施加电压 V2(gk)在第 二子像素, 设 AV12 (gk) = Vl(gk)-V2 (gk), 其中, 0 < gk≤n, gk禾卩 n是 0以上的 整数, n表示亮度最高的灰度等级; 在显示灰度等级 gk小于预定灰度等级 gs吋, 施加电压 Vl(gk)和电压 V2(gk)使得 AV12(gk)〉0伏, 且满足 AV12(gk) >
AV12(gk+l)的关系; 在显示灰度等级 gk等于或大于预定灰度等级 gs吋, 设 Vl(gk) <V2(gk)使得 AV12(gk)<0伏, 且满足 AV12(gk) < AV12(gk+l)的关系。
[0026] 可选地, 液晶显示装置驱动方法还包括施加电压 V3(gk)在不同于第一子像素及 第二子像素的第三子像素的液晶层上, 设 AV13(gk) = Vl(gk)_V3(gk); 在显示灰 度等级 gk小于预定灰度等级 gs吋, 施加电压 Vl(gk)和电压 V3(gk)使得设 AV13(gk) 〉0伏, 且满足 AV12(gk) > AV13(gk)的关系; 在显示灰度等级 gk等于或大于预定 灰度等级 gs吋, 设 Vl(gk) <V3(gk)使得 AV13(gk) < 0伏, 且满足 AV12(gk) = AV13(gk)的关系。
[0027] 可选地, 液晶显示装置驱动方法还包括第一源极线和第二源极线分别提供第一 子像素和第二子像素各自的电压信号; 栅极线提供第一子像素和第二子像素相 同扫描信号。
[0028] 可选地, 在电压为 Vl(gk)小于预定电压 Vs吋, 施加电压 Vl(gk)和电压 V2(gk)使 得 AV12(gk)〉0伏, 且满足 AV12(gk) > AV12(gk+l)的关系; 在电压为 Vl(gk)等于 或大于预定电压 Vs吋, 设 Vl(gk)<V2(gk)使得 AV12(gk) < 0伏, 且满足 AV12(gk) ≤AV12(gk+l)的关系。
[0029] 可选地, 亮度最高的灰度等级 n为 256。 预定灰度等级 gs为 128。
[0030] 可选地, 多个像素为矩阵型的像素。
[0031] 本申请实施例提供了一种液晶显示装置驱动方法, 液晶显示装置包括液晶层, 区分为多个像素且每一象素包括第一子像素和第二子像素, 多个像素具有在液 晶层上施加电压的多个电极; 液晶显示装置驱动方法, 包括; 多个像素的每一 象素在显示灰度等级 gk吋, 施加电压 Vl(gk)在第一子像素和施加电压 V2(gk)在第 二子像素, ¾AV12 (gk) = VI (gk) -V2 (gk) , 其中, 0 < gk≤n, gk禾卩 n是 0以上的 整数, n表示亮度最高的灰度等级; 在显示灰度等级 gk小于预定灰度等级 gs吋,
施加电压 Vl(gk)和电压 V2(gk)使得 AV12(gk) > 0伏, 且满足 AV12(gk) =AV12(gk+l)的关系; 在显示灰度等级 gk等于或大于预定灰度等级 gs吋, 设 Vl(g k)<V2(gk)使得 AV12(gk) < 0伏, 且满足 AV12(gk) =AV12(gk+l)的关系。
[0032] 可选地, 液晶显示装置驱动方法还包括施加电压 V3(gk)在不同于所述第一子像 素及所述第二子像素的第三子像素的液晶层上, 设 AV13(gk) = Vl(gk)-V3(gk); 在显示灰度等级 gk小于预定灰度等级 gs吋, 施加电压 Vl(gk)和电压 V3(gk)使得设 AV13(gk)〉0伏, 且满足 AV12(gk)〉AV13(gk)的关系; 在显示灰度等级 gk等于或 大于预定灰度等级 gs吋, 设 Vl(gk)<V3(gk)使得 AV13(gk)< 0伏, 且满足 AV12(gk) = AV13(gk)的关系。
[0033] 可选地, 液晶显示装置驱动方法还包括第一源极线和第二源极线分别提供第一 子像素和第二子像素各自的电压信号; 栅极线提供第一子像素和第二子像素相 同扫描信号。
[0034] 可选地, 在电压为 Vl(gk)小于预定电压 Vs吋, 施加电压 Vl(gk)和电压 V2(gk)使 得 AV12(gk)〉0伏, 且满足 AV12(gk) = AV12(gk+l)的关系; 在电压为 Vl(gk)等于 或大于预定电压 Vs吋, 设 Vl(gk)<V2(gk)使得 AV12(gk) < 0伏, 且满足 AV12(gk) = AV12(gk+l)的关系。
[0035] 可选地, 亮度最高的灰度等级 n为 256。 预定灰度等级 gs为 128。
[0036] 可选地, 多个像素为矩阵型的像素。
[0037] 本申请实施例提供了一种液晶显示装置驱动方法, 液晶显示装置包括液晶层, 区分为多个像素且每一象素包括第一子像素和第二子像素, 多个像素具有在液 晶层上施加电压的多个电极; 液晶显示装置驱动方法, 包括; 多个像素的每一 象素在显示灰度等级 gk吋, 施加电压 Vl(gk)在第一子像素和施加电压 V2(gk)在第 二子像素, ¾AV12 (gk) = VI (gk) -V2 (gk) , 其中, 0 < gk≤n, gk禾卩 n是 0以上的 整数, n表示亮度最高的灰度等级; 在显示灰度等级 gk小于预定灰度等级 gs吋, 施加电压 Vl(gk)和电压 V2(gk)使得 AV12(gk) > 0伏, 且满足 AV12(gk)
≥AV12(gk+l)的关系; 在显示灰度等级 gk等于或大于预定灰度等级 gs吋, 设 Vl(g k)<V2(gk)使得 AV12(gk) < 0伏, 且满足 AV12(gk) =AV12(gk+l)的关系。
[0038] 可选地, 液晶显示装置驱动方法还包括施加电压 V3(gk)在不同于所述第一子像
素及所述第二子像素的第三子像素的液晶层上, 设 AV13(gk) = Vl(gk)-V3(gk); 在显示灰度等级 gk小于预定灰度等级 gs吋, 施加电压 Vl(gk)和电压 V3(gk)使得设 AV13(gk)〉0伏, 且满足 AV12(gk)〉AV13(gk)的关系; 在显示灰度等级 gk等于或 大于预定灰度等级 gs吋, 设 Vl(gk)<V3(gk)使得 AV13(gk) < 0伏, 且满足 AV12(gk) = AV13(gk)的关系。
[0039] 可选地, 液晶显示装置驱动方法还包括第一源极线和第二源极线分别提供第一 子像素和第二子像素各自的电压信号; 栅极线提供第一子像素和第二子像素相 同扫描信号。
[0040] 可选地, 在电压为 Vl(gk)小于预定电压 Vs吋, 施加电压 Vl(gk)和电压 V2(gk)使 得 AV12(gk)〉0伏, 且满足 AV12(gk)≥AV12(gk+l)的关系; 在电压为 Vl(gk)等于 或大于预定电压 Vs吋, 设 Vl(gk)<V2(gk)使得 AV12(gk) < 0伏, 且满足 AV12(gk) = AV12(gk+l)的关系。
[0041] 可选地, 亮度最高的灰度等级 n为 256。 预定灰度等级 gs为 128。
发明的有益效果
有益效果
[0042] 基于上述, 本申请提供了液晶显示装置及其驱动方法, 藉由在子像素施加各自 的电压而改善液晶显示装置在不同视角的 γ特性, 提高显示品质。 另外, 本申请 在显示不同灰度等级吋提供不同施加电压条件, 能改善驱动流程, 提升液晶显 示装置的驱动效率。
对附图的简要说明
附图说明
[0043] 为了更清楚地说明本申请的实施例技术方案, 下面将对实施例描述中所需要使 用的附图作简单地介绍, 显而易见地, 下面描述中的附图是本申请的一些实施 例, 对于本领域普通技术人员来讲, 在不付出创造性劳动的前提下, 还可以根 据这些附图获得其他的附图。
[0044] 图 1为本申请一实施例中液晶显示装置的示意图;
[0045] 图 2为本申请一实施例中液晶显示装置的像素的示意图;
[0046] 图 3a、 3b为本申请一实施例中施加电压状态的示意图;
[0047] 图 4为本申请一实施例中液晶显示装置的另一种像素的示意图;
[0048] 图 5为本申请一实施例中液晶显示装置驱动方法的流程图;
[0049] 图 6a、 6b为本申请一实施例中另一种施加电压状态的示意图;
[0050] 图 7为本申请一实施例中液晶另一种显示装置驱动方法的流程图;
[0051] 图 8a、 8b为本申请一实施例中又一种施加电压状态的示意图;
[0052] 图 9为本申请一实施例中液晶又一种显示装置驱动方法的流程图。
本发明的实施方式
[0053] 下面将结合本申请实施例中的附图, 对本申请实施例中的技术方案进行清楚、 完整地描述。 显然, 所描述的实施例是本申请一部分实施例, 而不是全部的实 施例。 基于本申请中的实施例, 本领域普通技术人员在没有做出创造性劳动前 提下所获得的所有其他实施例, 都属于本申请保护的范围。
[0054] 图 1为本申请一实施例中液晶显示装置的示意图, 请参阅图 1, 液晶显示装置 10 0包括以矩阵状设置的多个像素 P, 在每一个像素 P当中, 具有在基板 10上设置的 液晶层 11, 液晶显示装置 100是以常黑方式显示。 液晶层 11通过像素电极和共同 电极 13形成的电场, 改变液晶分子扭转方向, 进而改变液晶显示装置 100的透光 性。 其中, 像素电极包含第一电极 12a和第二电极 12b, 设置于基板 10和液晶层 11 之间, 第一电极 12a和共用电极 13施加电压于像素 P的第一子像素 Pl, 而第二电 极 12b和共用电极 13施加电压于像素 P的第二子像素 P2。 由于第一电极 12a和第二 电极 12b可施加不同电压, 因此在每一个像素 P当中, 可以控制在不同子像素的 液晶具有不同的转向程度, 因此, 再针对不同视角吋, 液晶显示装置 100的 γ特 性能得到改善。
[0055] 图 2为本申请一实施例中一种液晶显示装置的像素的示意图, 请参阅图 2, 液晶 显示器可藉由平行设置的栅极线以及平行设置的源极线形成矩阵型的像素 Ρ, 每 一像素 Ρ的区域可分为第一子像素 P1和第二子像素 Ρ2。 其中, 第一子像素 P1包括 第一电极 12a和第一电晶体 Tl, 第一电极 12a通过第一电晶体 T1电连接于第一源 极线 SL1, 第二子像素 P2包括第二电极 12b和第二电晶体 T2, 第二电极 12b通过第 二电晶体 T2电连接于第二源极线 SL2, 第一源极线 SL1和第二源极线 SL2平行设
置, 分别提供第一子像素 PI和第二子像素 P2各自的电压信号。 另外, 第一电晶 体 T1和第二电晶体 T2电连接于同一栅极线 GL, 由栅极线 GL提供第一子像素 PI和 第二子像素 P2相同扫描信号。 在每一象素 P需要显示特定灰度等级吋, 连接栅极 线和源极线的控制芯片可经由栅极线 GL对像素 P送出相同扫描信号, 且分别由第 一源极线 SL1和第二源极线 SL2送出各自的电压信号, 使得第一电极 12a和第二电 极 12b能个别于像素的液晶层上施加不同电压。
[0056] 图 3a、 3b为本申请一实施例中施加电压状态的示意图, 请参阅图 3a, 横轴为施 加在第一像素的第一电压 Vl(gk), 纵轴为施加在第二像素的第二电压 V2(gk), 设 定电压差 AV12 (gk)=Vl(gk)-V2(gk), 其中, 0≤gk≤n, gk和 n是 0以上的整数, gk 为液晶显示装置的像素显示的灰度等级, n表示亮度最高的灰度等级, 例如 n可 为 256。 第一电压 Vl(gk)和第二电压 V2(gk)施加状态如图所示, 当显示的灰度等 级 gk小于预定灰度等级 gs吋, 设定 AV12(gk) > 0伏,
且满足 AV12(gk)>AV12(gk+l)的关系, 亦即灰度等级 gk在 0和 gs之间的情况下, 第一电压 Vl(gk)大于第二电压 V2(gk), 同吋在灰度等级 gk提高吋, 第一电压 Vl(g k)和第二电压 V2(gk)的电压差 AV12(gk)逐渐降低。 当显示灰度等级 gk等于或大于 预定灰度等级 gs吋, 设 AV12(gk)=0伏, 且满足 AV12(gk) =AV12(gk+l)的关系, 亦即灰度等级 gk在 gs和 n之间的情况下, 控制第一电压 Vl(gk)等于第二电压 V2(gk ), 使得第一电压 Vl(gk)和第二电压 V2(gk)的电压差 AV12(gk)为 0, 在灰度等级 gk 提高吋, 第一电压 Vl(gk)和第二电压 V2(gk)的电压差 AV12(gk)维持不变。
[0057] 请参阅图 3b, 横轴为施加在第一像素的第一电压 Vl(gk), 纵轴为施加在第二像 素的第二电压 V2(gk), 设定电压差 AV12(gk) =Vl(gk)-V2 (gk), 其中, 0≤gk≤ n, gk和 n是 0以上的整数, gk为液晶显示装置的像素显示的灰度等级, n表示亮 度最高的灰度等级, 例如 n可为 256。 第一电压 Vl(gk)和第二电压 V2(gk)施加状态 如图所示, 当显示的灰度等级 gk小于预定灰度等级 gs吋, 设定 AV12(gk)〉0伏, 且满足 AV12(gk)=AV12(gk+l)的关系, 亦即灰度等级 gk在 0和 gs之间的情况下, 第一电压 Vl(gk)大于第二电压 V2(gk), 同吋在灰度等级 gk提高吋, 第一电压 Vl(g k)和第二电压 V2(gk)的电压差 AV12(gk)维持不变。 当显示灰度等级 gk等于或大于 预定灰度等级 gs吋, 设 AV12(gk)=0伏, 且满足 AV12(gk)=AV12(gk+l)的关系, 亦
即灰度等级 gk在 gs和 n之间的情况下, 控制第一电压 Vl(gk)等于第二电压 V2(gk) , 使得第一电压 Vl(gk)和第二电压 V2(gk)的电压差 AV12(gk)为 0, 在灰度等级 gk 提高吋, 第一电压 Vl(gk)和第二电压 V2(gk)的电压差 AV12(gk)维持不变。
[0058] 由于液晶显示装置的透光率会随着施加电压增加而提高, 因此, 上述设定的预 订灰度等级 gs, 可利用其对应的施加电压大小来判断。 当施加第一电压 Vl(gk)达 到对应预定灰度等级 gs的电压值 Vs(gs)吋, 则可依据图 3a、 3b中所示的施加电压 状态来控制液晶显示装置。 藉由上述方法, 可控制施加在第一子像素的第一电 压和施加在第二子像素的第二电压, 使得在灰度等级低吋, 能提供适当的电压 差, 改善液晶显示装置在不同视角的 γ特性, 当显示的灰度等级达到预定灰度等 级吋, 例如当预定灰度等级 gs大于 128吋, 使第一子像素和第二子像素施加的电 压相等, 减少切换不同电压信号的控制程序, 提升液晶显示装置的驱动效率。
[0059] 图 4为本申请一实施例中液晶显示装置的另一种像素的示意图, 请参阅图 4, 液 晶显示器可藉由平行设置的栅极线以及平行设置的源极线形成矩阵型的像素 P, 每一像素 P的区域可分为第一子像素 PI、 第二子像素 P2和第三子像素 P3。 其中, 第一子像素 P1包括第一电极 12a和第一电晶体 Tl, 第一电极 12a通过第一电晶体 Τ 1电连接于第一源极线 SL1, 第二子像素 P2包括第二电极 12b和第二电晶体 T2, 第 二电极 12b通过第二电晶体 Τ2电连接于第二源极线 SL2, 第三子像素 P3包括第三 电极 12c和第三电晶体 T3, 第三电极 12c通过第三电晶体 Τ3电连接于第二源极线 S L2, 第一源极线 SL1和第二源极线 SL2平行设置, 第一源极线 SL1提供第一子像 素 P1电压信号, 第二源极线 SL2提供第二子像素 P2电压信号。 另外, 第一电晶体 T1和第二电晶体 T2电连接于第一栅极线 GL1, 由第一栅极线 GL1提供第一子像素 P1和第二子像素 P2相同扫描信号, 第三电晶体 T3电连接于第二栅极线 GL2, 由 第二栅极线 GL2提供第三子像素 P3扫描信号。 在每一象素 P需要显示特定灰度等 级吋, 连接栅极线和源极线的控制芯片可经由第一栅极线 GL1和第二栅极线 GL2 对像素 P送出扫描信号, 且分别由第一源极线 SL1和第二源极线 SL2送出各自的电 压信号, 使得第一电极 12a、 第二电极 12b和第三电极 12c能个别于像素的液晶层 上施加不同电压。
[0060] 上述实施例是将像素分为三个子像素, 其中施加于第三子像素 P3的电压可为 V
3(gk) , 设定第一子像素 PI和第三子像素的电压差 AV13(gk) = Vl(gk)-V3(gk)。 其 中, 在显示灰度等级 gk小于预定灰度等级 gs吋, 设 AV13(gk)〉0伏, 且满足 Δνΐ2 (gk)>AV13(gk)的关系, 亦即灰度等级 gk在 0和 gs之间的情况下, 第一电压 Vl(gk) 大于第三电压 V2(gk), 同吋, 第一电压 Vl(gk)和第二电压 V2(gk)的电压差 AV12(g k)大于第一子像素 PI和第三子像素的电压差 AV13(gk)。 当显示灰度等级 gk等于或 大于预定灰度等级 gs吋, 设 AV13(gk) = 0伏, 且满足 AV12(gk)=AV13(gk)的关系 。 亦即灰度等级 gk在 gs和 n之间的情况下, 控制第一电压 Vl(gk)等于第三电压 V3( gk) , 使得 AV13(gk)=0, 也因此在灰度等级 gk提高吋, 电压差 AV12(gk)和 AV13(g k)均相等。 上述子像素划分方法, 可将第二子像素 P2与第三子像素 P3划分为相同 面积, 但本申请不以此为限, 每一个像素也可划分为 3个以上的子像素, 且依照 划分数量设计每一子像素所占面积。 不过, 划分越多子像素需要更多控制线路 才能提供不同施加电压, 因此, 可视液晶显示装置所需呈现的显示品质提供适 当的子像素划分数量及位置。
[0061] 图 5为本申请一实施例中液晶显示装置驱动方法的流程图, 请参阅图 5, 液晶显 示装置驱动方法适用于图 1和图 2的液晶显示装置, 包括液晶层 11, 每一象素 P包 括第一子像素 P1和第二子像素 P2, 由第一源极线 SL1和第二源极线 SL2分别提供 第一子像素 P1和第二子像素 P2各自的电压信号, 且通过栅极线 GL提供第一子像 素 P1和第二子像素 P2相同扫描信号, 进而通过第一电极 12a在液晶层 11上的第一 像素 P1施加电压和通过第二电极 12b在液晶层 11上的第二像素 P2施加电压。 液晶 显示装置驱动方法包含以下步骤 (S01-S04):
[0062] 步骤 S01 : 施加第一电压 Vl(gk)在第一子像素和施加第二电压 V2(gk)在第二子 像素;
[0063] 步骤 S02: 判断显示显示灰度等级 gk是否小于预定灰度等级 gs; 与前述实施例 相同, 步骤 S02当中判断灰度等级是否小于预定灰度等级 gs也可以透过比较施加 第一电压 Vl(gk)是否达到对应预定灰度等级 gs的电压值 Vs(gs)来进行判断。
[0064] 若是, 则进入步骤 S03: 施加第一电压 Vl(gk)和第二电压 V2(gk)使得 AV12(gk) 〉0伏, 且满足 AV12(gk) > AV12(gk+l)的关系;
[0065] 若否, 则进入步骤 S04: 设 Vl(gk)=V2(gk)使得 AV12(gk) = 0伏,
且满足 AV12(gk) = AV12(gk+l)的关系。
[0066] 上述步骤是参阅图 3a的电压控制状态来执行的步骤, 若是参阅图 3b的电压控制 状态, 则步骤 S03是满足 AV12(gk) = AV12(gk+l)的关系。 另外, 若是像素分为三 个以上的子像素, 则在步骤 S03与 S04的施加电压控制上, 则如同图 4所揭露的内 容, 加入第三子像素的施加电压控制方法。 例如:步骤 S03除施加施加第一电压 V l(gk)和第二电压 V2(gk)外, 还对第三子像素施加第三电压 V3(gk), 且满足 Δνΐ3( gk)〉0伏, 且满足 AV12(gk) >AV13(gk)的关系。 步骤 S04则包括设 Vl(gk)=V3(gk) 使得 AV13(gk) =0伏, 且满足 AV12(gk) = AV13(gk)的关系。
[0067] 图 6a、 6b为本申请一实施例中另一种施加电压状态的示意图, 请参阅图 6a, 横 轴为施加在第一像素的第一电压 Vl(gk), 纵轴为施加在第二像素的第二电压 V2(g k), 设定电压差 AV12 (gk) =Vl(gk)-V2 (gk), 其中, 0≤gk≤n, gk和 n是 0以上的整 数, gk为液晶显示装置的像素显示的灰度等级, n表示亮度最高的灰度等级, 例 如 n可为 256。 第一电压 Vl(gk)和第二电压 V2(gk)施加状态如图所示, 当显示的灰 度等级 gk小于预定灰度等级 gs吋, 设定 AV12(gk)〉0伏, 且满足 AV12(gk)>AV12( gk+1)的关系, 亦即灰度等级 gk在 0和 gs之间的情况下, 第一电压 Vl(gk)大于第二 电压 V2(gk), 同吋在灰度等级 gk提高吋, 第一电压 Vl(gk)和第二电压 V2(gk)的电 压差 AV12(gk)逐渐降低。 当显示灰度等级 gk等于或大于预定灰度等级 gs吋, 设 Δ V12(gk)<0伏, 且满足 AV12(gk)≤AV12(gk+l)的关系, 亦即灰度等级 gk在 gs和 n之 间的情况下, 控制第一电压 Vl(gk)小于第二电压 V2(gk), 使得第一电压 Vl(gk)和 第二电压 V2(gk)的电压差 AV12(gk)小于 0, 在灰度等级 gk提高吋, 第一电压 Vl(g k)和第二电压 V2(gk)的电压差 Δν 12(gk)逐渐增加。
[0068] 请参阅图 6b, 横轴为施加在第一像素的第一电压 Vl(gk), 纵轴为施加在第二像 素的第二电压 V2(gk), 设定电压差八¥12 ^¾ = ¥1 ^¾ -¥2 ¾, 其中, 0≤ gk≤ n, gk和 n是 0以上的整数, gk为液晶显示装置的像素显示的灰度等级, n表示亮 度最高的灰度等级, 例如 n可为 256。 第一电压 Vl(gk)和第二电压 V2(gk)施加状态 如图所示, 当显示的灰度等级 gk小于预定灰度等级 gs吋, 设定 AV12(gk)〉0伏, 且满足 AV12(gk) = AV12(gk+l)的关系, 亦即灰度等级 gk在 0和 gs之间的情况下, 第一电压 Vl(gk)大于第二电压 V2(gk), 同吋在灰度等级 gk提高吋, 第一电压 Vl(g
k)和第二电压 V2(gk)的电压差 AV12(gk)维持不变。 当显示灰度等级 gk等于或大于 预定灰度等级 gs吋, 设 AV12(gk) < 0伏, 且满足 AV12(gk) = AV12(gk+l)的关系, 亦即灰度等级 gk在 gs和 n之间的情况下, 控制第一电压 Vl(gk)小于第二电压 V2(gk ), 使得第一电压 Vl(gk)和第二电压 V2(gk)的电压差 AV12(gk)小于 0, 在灰度等级 gk提高吋, 第一电压 Vl(gk)和第二电压 V2(gk)的电压差 AV12(gk)维持不变。
[0069] 由于液晶显示装置的透光率会随着施加电压增加而提高, 因此, 上述设定的预 订灰度等级 gs, 可利用其对应的施加电压大小来判断。 当施加第一电压 Vl(gk)达 到对应预定灰度等级 gs的电压值 Vs(gs)吋, 则可依据图 6a、 6b中所示的施加电压 状态来控制液晶显示装置。 藉由上述方法, 可控制施加在第一子像素的第一电 压和施加在第二子像素的第二电压, 使得在灰度等级低吋, 能提供适当的电压 差, 改善液晶显示装置在不同视角的 γ特性, 当显示的灰度等级达到预定灰度等 级吋, 例如当预定灰度等级 gs大于 128吋, 使第一子像素施加的电压小于第二子 像素施加的电压, 藉由改变施加电压的状态, 提升液晶显示装置的显示效果。
[0070] 若是液晶显示装置的像素如图 4分为分为三个子像素, 除了第一电压 Vl(gk)和 第二电压 V2(gk)外, 还对第三子像素施加第三电压 V3(gk), 在显示灰度等级 gk小 于预定灰度等级 gs吋, 满足 AV13(gk)〉0伏, 且满足 AV12(gk)>AV13(gk)的关系 。 在显示灰度等级 gk等于或大于所述预定灰度等级 gs吋, 则设 AV13(gk)<0伏, 且满足 AV12(gk) = AV13(gk)的关系。
[0071] 图 7为本申请一实施例中另一种液晶显示装置驱动方法的流程图, 请参阅图 7, 液晶显示装置驱动方法适用于图 1和图 2的液晶显示装置, 包括液晶层 11, 每一 象素 P包括第一子像素 P1和第二子像素 P2, 由第一源极线 SL1和第二源极线 SL2 分别提供第一子像素 P1和第二子像素 P2各自的电压信号, 且通过栅极线 GL提供 第一子像素 P1和第二子像素 P2相同扫描信号, 进而通过第一电极 12a在液晶层 11 上的第一像素 P1施加电压和通过第二电极 12b在液晶层 11上的第二像素 P2施加电 压。 液晶显示装置驱动方法包含以下步骤 (S11-S14):
[0072] 步骤 S11 : 施加第一电压 Vl(gk)在第一子像素和施加第二电压 V2(gk)在第二子 像素;
[0073] 步骤 S12: 判断显示显示灰度等级 gk是否小于预定灰度等级 gs; 与前述实施例
相同, 步骤 S12当中判断灰度等级是否小于预定灰度等级 gs也可以透过比较施加 第一电压 Vl(gk)是否达到对应预定灰度等级 gs的电压值 Vs(gs)来进行判断。
[0074] 若是, 则进入步骤 S 13: 施加电压 Vl(gk)和电压 V2(gk)使得 AV12(gk)〉0伏, 且 满足 AV12(gk) >AV12(gk+l)的关系;
[0075] 若否, 则进入步骤 S14: 设 Vl(gk)<V2(gk)使得 AV12(gk)<0伏,
且满足 AV12(gk) < AV12(gk+l)的关系。
[0076] 上述步骤是参阅图 6a的电压控制状态来执行的步骤, 若是参阅图 6b的电压控制 状态, 则步骤 S13是满足 AV12(gk) =AV12(gk+l)的关系,
步骤 S14是满足 AV12(gk) = AV12(gk+l)的关系。 另外, 若是像素分为三个以上的 子像素, 则在步骤 S13与 S14的施加电压控制上, 加入第三子像素的施加电压控 制方法。 在显示灰度等级 gk小于预定灰度等级 gs吋, 施加电压 Vl(gk)和电压 V3(g k)使得设 AV13(gk)〉0伏,
且满足 AV12(gk)>AV13(gk)的关系。 在显示灰度等级 gk等于或大于所述预定灰度 等级 gs吋, 则设 Vl(gk)<V3(gk)使得 AV13(gk) < 0伏, 且满足 AV12(gk)
=AV13(gk)的关系。
[0077] 图 8a、 8b为本申请一实施例中又一种施加电压状态的示意图, 请参阅图 8a, 横 轴为施加在第一像素的第一电压 Vl(gk), 纵轴为施加在第二像素的第二电压 V2(g k), 设定电压差 AV12(gk)=Vl(gk)-V2 (gk), 其中, 0≤gk≤n, gk和 n是 0以上的整 数, gk为液晶显示装置的像素显示的灰度等级, n表示亮度最高的灰度等级, 例 如 n可为 256。 第一电压 Vl(gk)和第二电压 V2(gk)施加状态如图所示, 当显示的灰 度等级 gk小于预定灰度等级 gs吋, 设定 AV12(gk)〉0伏, 且满足 AV12(gk)>AV12( gk+1)的关系, 亦即灰度等级 gk在 0和 gs之间的情况下, 第一电压 Vl(gk)大于第二 电压 V2(gk), 同吋在灰度等级 gk提高吋, 第一电压 Vl(gk)和第二电压 V2(gk)的电 压差 AV12(gk)逐渐降低。 当显示灰度等级 gk等于或大于预定灰度等级 gs吋, 设 Δ V12(gk)<0伏, 且满足 AV12(gk)≤AV12(gk+l)的关系, 亦即灰度等级 gk在 gs和 n之 间的情况下, 控制第二电压 V2(gk)维持不变, 第一电压 Vl(gk)和第二电压 V2(gk) 的电压差 AV12(gk)大于 0, 在灰度等级 gk提高吋, 第一电压 Vl(gk)和第二电压 V2 (gk)的电压差 AV12(gk)逐渐减少。
[0078] 请参阅图 8b, 横轴为施加在第一像素的第一电压 Vl(gk), 纵轴为施加在第二像 素的第二电压 V2(gk), 设定电压差 AV12(gk) =Vl(gk)-V2 (gk), 其中,
0≤gk≤n, gk和 n是 0以上的整数, gk为液晶显示装置的像素显示的灰度等级, n表 示亮度最高的灰度等级, 例如 n可为 256。 第一电压 Vl(gk)和第二电压 V2(gk)施加 状态如图所示, 当显示的灰度等级 gk小于预定灰度等级 gs吋, 设定 AV12(gk)〉0 伏, 且满足 AV12(gk)=AV12(gk+l)的关系, 亦即灰度等级 gk在 0和 gs之间的情况 下, 第一电压 Vl(gk)大于第二电压 V2(gk), 同吋在灰度等级 gk提高吋, 第一电压 Vl(gk)和第二电压 V2(gk)的电压差 AV12(gk)维持不变。 当显示灰度等级 gk等于或 大于预定灰度等级 gs吋, 设 AV12(gk)>0伏, 且满足 AV12(gk)<AV12(gk+l)的关系 , 亦即灰度等级 gk在 gs和 n之间的情况下, 控制第二电压 V2(gk)维持不变, 第一 电压 Vl(gk)和第二电压 V2(gk)的电压差 AV12(gk)大于 0, 在灰度等级 gk提高吋, 第一电压 Vl(gk)和第二电压 V2(gk)的电压差 AV12(gk)逐渐减少。
[0079] 由于液晶显示装置的透光率会随着施加电压增加而提高, 因此, 上述设定的预 订灰度等级 gs, 可利用其对应的施加电压大小来判断。 例如当施加第一电压 Vl(g k)达到对应预定灰度等级 gs的电压值 Vs(gs)吋, 则可依据图 8a、 8b中所示的施加 电压状态来控制液晶显示装置。 藉由上述方法, 可控制施加在第一子像素的第 一电压和施加在第二子像素的第二电压, 使得在灰度等级低吋, 能提供适当的 电压差, 改善液晶显示装置在不同视角的 γ特性, 当显示的灰度等级达到预定灰 度等级吋, 例如当预定灰度等级 gs大于 128吋, 使第二子像素施加的电压不变, 仅由改变第一子像素施加电压来调整显示的状态, 提升液晶显示装置的便利性 并维持优异的显示效果。
[0080] 若是液晶显示装置的像素如图 4分为分为三个子像素, 除了第一电压 Vl(gk)和 第二电压 V2(gk)外, 还对第三子像素施加第三电压 V3(gk), 在显示灰度等级 gk小 于预定灰度等级 gs吋, 满足 AV13(gk)〉0伏, 且满足 AV12(gk)>AV13(gk)的关系 。 在显示灰度等级 gk等于或大于所述预定灰度等级 gs吋, 则设 AV13(gk)<0伏, 且满足 AV13(gk) < AV13(gk+l)的关系。
[0081] 图 9为本申请一实施例中又一种液晶显示装置驱动方法的流程图, 请参阅图 9, 液晶显示装置驱动方法适用于图 1和图 2的液晶显示装置, 包括液晶层 11, 每一
象素 P包括第一子像素 PI和第二子像素 P2, 由第一源极线 SL1和第二源极线 SL2 分别提供第一子像素 P1和第二子像素 P2各自的电压信号, 且通过栅极线 GL提供 第一子像素 P1和第二子像素 P2相同扫描信号, 进而通过第一电极 12a在液晶层 11 上的第一像素 P1施加电压和通过第二电极 12b在液晶层 11上的第二像素 P2施加电 压。 液晶显示装置驱动方法包含以下步骤 (S21-S24):
[0082] 步骤 S21 : 施加第一电压 Vl(gk)在第一子像素和施加第二电压 V2(gk)在第二子 像素;
[0083] 步骤 S22: 判断显示显示灰度等级 gk是否小于预定灰度等级 gs; 与前述实施例 相同, 步骤 S22当中判断灰度等级是否小于预定灰度等级 gs也可以透过比较施加 第一电压 Vl(gk)是否达到对应预定灰度等级 gs的电压值 Vs(gs)来进行判断。
[0084] 若是, 则进入步骤 S23: 施加电压 Vl(gk)和电压 V2(gk)使得 AV12(gk)〉0伏, 且 满足 AV12(gk) > AV12(gk+l)的关系;
[0085] 若否, 则进入步骤 S24: 设 V2(gk)不变使得 AV12(gk) > 0伏, 且满足 AV12(gk) < AV12(gk+l)的关系。
[0086] 上述步骤是参阅图 8a的电压控制状态来执行的步骤, 若是参阅图 8b的电压控制 状态, 则步骤 S23是满足 AV12(gk)
=AV12(gk+l)的关系, 步骤 S24是同样满足 AV12(gk) < AV12(gk+l)的关系。 另外
, 若是像素分为三个以上的子像素, 则在步骤 S23与 S24的施加电压控制上, 加 入第三子像素的施加电压控制方法。 在显示灰度等级 gk小于预定灰度等级 gs吋, 施加电压 Vl(gk)和电压 V3(gk)使得设 AV13(gk)〉0伏, 且满足 AV12(gk) > AV13(gk)的关系。 在显示灰度等级 gk等于或大于所述预定灰度等级 gs吋, 则设 V 3(gk)不变使得 AV13(gk) > 0伏, 且满足 AV13(gk) < AV13(gk+l)的关系。
[0087] 需要说明的是, 在上述实施例中, 对各个实施例的描述都各有侧重, 某个实施 例中没有详细描述的部分, 可以参见其他实施例的相关描述。
[0088] 以上所述, 仅为本申请的具体实施方式, 但本申请的保护范围并不局限于此, 任何熟悉本技术领域的技术人员在本申请揭露的技术范围内, 可轻易想到各种 等效的修改或替换, 这些修改或替换都应涵盖在本申请的保护范围之内。 因此 , 本申请的保护范围应以权利要求的保护范围为准。
Claims
[权利要求 1] 一种液晶显示装置驱动方法, 其特征在于: 所述液晶显示装置包括液 晶层, 区分为多个像素且每一象素包括第一子像素和第二子像素, 所 述多个像素具有在所述液晶层上施加电压的多个电极;
所述液晶显示装置驱动方法, 包括;
所述多个像素的每一象素在显示灰度等级 gk吋, 施加电压 Vl(gk)在所 述第一子像素和施加电压 V2(gk)在所述第二子像素, 设 AV12(gk)=Vl( gk)-V2(gk) , 其中, 0≤gk≤n, gk和 n是 0以上的整数, n表示亮度最高 的灰度等级;
在显示灰度等级 gk小于预定灰度等级 gs吋, 施加电压 Vl(gk)和电压 V2 (gk)使得 AV12(gk) > 0伏, 且满足 AV12(gk)>AV12(gk+l)的关系; 在显示灰度等级 gk等于或大于所述预定灰度等级 gs吋, 设 Vl(gk)<V2( gk)使得 AV12(gk)<0伏, 且满足 AV12(gk)≤AV12(gk+l)的关系。
[权利要求 2] 如权利要求 1所述的液晶显示装置驱动方法, 其特征在于, 所述液晶 显示装置驱动方法还包括施加电压 V3(gk)在不同于所述第一子像素及 所述第二子像素的第三子像素的所述液晶层上, 设 AV13(gk) = Vl(gk) -V3(gk);
在显示灰度等级 gk小于预定灰度等级 gs吋, 施加电压 Vl(gk)和电压 V3 (gk)使得设 Δν 13(gk) > 0伏, 且满足 Δν 12(gk)>AV 13(gk)的关系; 在显示灰度等级 gk等于或大于所述预定灰度等级 gs吋, 设 Vl(gk)<V3( gk)使得 AV13(gk)<0伏, 且满足 AV12(gk) =AV13(gk)的关系。
[权利要求 3] 如权利要求 1所述的液晶显示装置驱动方法, 其特征在于, 所述液晶 显示装置驱动方法还包括所述第一源极线和所述第二源极线分别提供 所述第一子像素和所述第二子像素各自的电压信号; 栅极线提供所述第一子像素和所述第二子像素相同扫描信号。
[权利要求 4] 如权利要求 1所述的液晶显示装置驱动方法, 其特征在于, 在电压为
Vl(gk)小于预定电压 Vs吋, 施加电压 Vl(gk)和电压 V2(gk)使得 AV12(g k) > 0伏, 且满足 AV12(gk)>AV12(gk+l)的关系;
在电压为 Vl(gk)等于或大于所述预定电压 Vs吋, 设 Vl(gk)<V2(gk)使 得 AV12(gk)<0伏, 且满足 AV12(gk)≤AV12(gk+l)的关系。
[权利要求 5] 如权利要求 1所述的液晶显示装置驱动方法, 其特征在于, 亮度最高 的灰度等级 n为 256。
[权利要求 6] 如权利要求 1所述的液晶显示装置驱动方法, 其特征在于, 所述预定 灰度等级 gs为 128。
[权利要求 7] 如权利要求 1所述的液晶显示装置驱动方法, 其特征在于, 所述多个 像素为矩阵型的像素。
[权利要求 8] —种液晶显示装置驱动方法, 其特征在于: 所述液晶显示装置包括液 晶层, 区分为多个像素且每一象素包括第一子像素和第二子像素, 所 述多个像素具有在所述液晶层上施加电压的多个电极;
所述液晶显示装置驱动方法, 包括;
所述多个像素的每一象素在显示灰度等级 gk吋, 施加电压 Vl(gk)在所 述第一子像素和施加电压 V2(gk)在所述第二子像素, 设 AV12(gk)=Vl( gk)-V2(gk) , 其中, 0≤gk≤n, gk和 n是 0以上的整数, n表示亮度最高 的灰度等级;
在显示灰度等级 gk小于预定灰度等级 gs吋, 施加电压 Vl(gk)和电压 V2 (gk)使得 AV12(gk) > 0伏, 且满足 AV12(gk)=AV12(gk+l)的关系; 在显示灰度等级 gk等于或大于所述预定灰度等级 gs吋, 设 Vl(gk)<V2( gk)使得 AV12(gk)<0伏, 且满足 AV12(gk)=AV12(gk+l)的关系。
[权利要求 9] 如权利要求 8所述的液晶显示装置驱动方法, 其特征在于, 所述液晶 显示装置驱动方法还包括施加电压 V3(gk)在不同于所述第一子像素及 所述第二子像素的第三子像素的所述液晶层上, 设 AV13(gk) = Vl(gk) -V3(gk);
在显示灰度等级 gk小于预定灰度等级 gs吋, 施加电压 Vl(gk)和电压 V3 (gk)使得设 AV13(gk) > 0伏, 且满足 AV12(gk) > AV13(gk)的关系; 在显示灰度等级 gk等于或大于所述预定灰度等级 gs吋, 设 Vl(gk)<V3( gk)使得 ΔΥ 13(gk)<0伏, 且满足 ΔΥ 12(gk)=AV 13(gk)的关系。
如权利要求 8所述的液晶显示装置驱动方法, 其特征在于, 所述液晶 显示装置驱动方法还包括所述第一源极线和所述第二源极线分别提供 所述第一子像素和所述第二子像素各自的电压信号;
栅极线提供所述第一子像素和所述第二子像素相同扫描信号。
如权利要求 8所述的液晶显示装置驱动方法, 其特征在于, 在电压为
Vl(gk)小于预定电压 Vs吋, 施加电压 Vl(gk)和电压 V2(gk)使得 AV12(g k) > 0伏, 且满足 AV12(gk)=AV12(gk+l)的关系;
在电压为 Vl(gk)等于或大于所述预定电压 Vs吋, 设 Vl(gk)<V2(gk)使 得 AV12(gk)<0伏, 且满足 AV12(gk)=AV12(gk+l)的关系。
如权利要求 8所述的液晶显示装置驱动方法, 其特征在于, 亮度最高 的灰度等级 n为 256。
如权利要求 8所述的液晶显示装置驱动方法, 其特征在于, 所述预定 灰度等级 gs为 128。
如权利要求 8所述的液晶显示装置驱动方法, 其特征在于, 所述多个 像素为矩阵型的像素。
一种液晶显示装置驱动方法, 其特征在于: 所述液晶显示装置包括液 晶层, 区分为多个像素且每一象素包括第一子像素和第二子像素, 所 述多个像素具有在所述液晶层上施加电压的多个电极;
所述液晶显示装置驱动方法, 包括;
所述多个像素的每一象素在显示灰度等级 gk吋, 施加电压 Vl(gk)在所 述第一子像素和施加电压 V2(gk)在所述第二子像素, 设 AV12(gk)=Vl( gk)-V2(gk) , 其中, 0≤gk≤n, gk和 n是 0以上的整数, n表示亮度最高 的灰度等级;
在显示灰度等级 gk小于预定灰度等级 gs吋, 施加电压 Vl(gk)和电压 V2 (gk)使得 AV12(gk)〉0伏, 且满足 AV12(gk)≥AV12(gk+l)的关系; 在显示灰度等级 gk等于或大于所述预定灰度等级 gs吋, 设 Vl(gk)<V2( gk)使得 AV12(gk)<0伏, 且满足 AV12(gk)=AV12(gk+l)的关系。
如权利要求 15所述的液晶显示装置驱动方法, 其特征在于, 所述液晶
显示装置驱动方法还包括施加电压 V3(gk)在不同于所述第一子像素及 所述第二子像素的第三子像素的所述液晶层上, 设 AV13(gk) = Vl(gk) -V3(gk);
在显示灰度等级 gk小于预定灰度等级 gs吋, 施加电压 Vl(gk)和电压 V3
(gk)使得设 AV13(gk) > 0伏, 且满足 AV12(gk) > AV13(gk)的关系; 在显示灰度等级 gk等于或大于所述预定灰度等级 gs吋, 设 Vl(gk)<V3( gk)使得 Δν 13(gk)<0伏, 且满足 Δν 12(gk)=AV 13(gk)的关系。
如权利要求 15所述的液晶显示装置驱动方法, 其特征在于, 所述液晶 显示装置驱动方法还包括所述第一源极线和所述第二源极线分别提供 所述第一子像素和所述第二子像素各自的电压信号;
栅极线提供所述第一子像素和所述第二子像素相同扫描信号。
如权利要求 15所述的液晶显示装置驱动方法, 其特征在于, 在电压为
Vl(gk)小于预定电压 Vs吋, 施加电压 Vl(gk)和电压 V2(gk)使得 AV12(g k) > 0伏, 且满足 AV12(gk)≥AV12(gk+l)的关系;
在电压为 Vl(gk)等于或大于所述预定电压 Vs吋, 设 Vl(gk)<V2(gk)使 得 AV12(gk)<0伏, 且满足 AV12(gk)=AV12(gk+l)的关系。
如权利要求 15所述的液晶显示装置驱动方法, 其特征在于, 亮度最高 的灰度等级 n为 256。
如权利要求 15所述的液晶显示装置驱动方法, 其特征在于, 所述预定 灰度等级 gs为 128。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201710744229.XA CN107393496A (zh) | 2017-08-25 | 2017-08-25 | 液晶显示装置驱动方法 |
CN201710744229.X | 2017-08-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2019037294A1 true WO2019037294A1 (zh) | 2019-02-28 |
Family
ID=60346141
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2017/111202 WO2019037294A1 (zh) | 2017-08-25 | 2017-11-15 | 液晶显示装置驱动方法 |
Country Status (2)
Country | Link |
---|---|
CN (1) | CN107393496A (zh) |
WO (1) | WO2019037294A1 (zh) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107515485A (zh) * | 2017-08-25 | 2017-12-26 | 惠科股份有限公司 | 液晶显示装置 |
CN107393495A (zh) * | 2017-08-25 | 2017-11-24 | 惠科股份有限公司 | 液晶显示装置驱动方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1773601A (zh) * | 2004-11-12 | 2006-05-17 | 三星电子株式会社 | 显示装置及其驱动方法 |
CN1811891A (zh) * | 2005-01-25 | 2006-08-02 | 三星电子株式会社 | 显示装置及其驱动设备和方法 |
CN101140749A (zh) * | 2007-10-31 | 2008-03-12 | 友达光电股份有限公司 | 像素的驱动方法 |
CN101510034A (zh) * | 2003-12-05 | 2009-08-19 | 夏普株式会社 | 液晶显示器 |
US20120299982A1 (en) * | 2010-02-16 | 2012-11-29 | Sharp Kabushiki Kaisha | Liquid crystal display device, display method, program, and recording medium |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3401049B2 (ja) * | 1993-05-26 | 2003-04-28 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 階調液晶表示パネル |
JP4342200B2 (ja) * | 2002-06-06 | 2009-10-14 | シャープ株式会社 | 液晶表示装置 |
CN100374946C (zh) * | 2005-01-04 | 2008-03-12 | 友达光电股份有限公司 | 亮度均匀的液晶面板、应用其的液晶显示器及其驱动方法 |
CN100381897C (zh) * | 2005-12-19 | 2008-04-16 | 友达光电股份有限公司 | 垂直配向型液晶显示装置及其像素单元电路 |
CN100547643C (zh) * | 2006-09-28 | 2009-10-07 | 友达光电股份有限公司 | 液晶显示器及其驱动方法 |
CN101535883B (zh) * | 2006-11-09 | 2011-08-10 | 夏普株式会社 | 液晶显示装置 |
US7916108B2 (en) * | 2008-04-21 | 2011-03-29 | Au Optronics Corporation | Liquid crystal display panel with color washout improvement and applications of same |
-
2017
- 2017-08-25 CN CN201710744229.XA patent/CN107393496A/zh active Pending
- 2017-11-15 WO PCT/CN2017/111202 patent/WO2019037294A1/zh active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101510034A (zh) * | 2003-12-05 | 2009-08-19 | 夏普株式会社 | 液晶显示器 |
CN1773601A (zh) * | 2004-11-12 | 2006-05-17 | 三星电子株式会社 | 显示装置及其驱动方法 |
CN1811891A (zh) * | 2005-01-25 | 2006-08-02 | 三星电子株式会社 | 显示装置及其驱动设备和方法 |
CN101140749A (zh) * | 2007-10-31 | 2008-03-12 | 友达光电股份有限公司 | 像素的驱动方法 |
US20120299982A1 (en) * | 2010-02-16 | 2012-11-29 | Sharp Kabushiki Kaisha | Liquid crystal display device, display method, program, and recording medium |
Also Published As
Publication number | Publication date |
---|---|
CN107393496A (zh) | 2017-11-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2019127668A1 (zh) | 液晶显示装置 | |
US7916108B2 (en) | Liquid crystal display panel with color washout improvement and applications of same | |
JP4861632B2 (ja) | 液晶表示装置及び映像信号補正方法 | |
JP2005292515A (ja) | 液晶表示装置およびその駆動方法ならびに電子機器 | |
JPWO2010143348A1 (ja) | 液晶表示装置 | |
EP2525256A1 (en) | Liquid crystal display device | |
WO2019056679A1 (zh) | 显示装置的驱动方法及显示装置 | |
JP7025547B2 (ja) | 表示駆動方法及び装置 | |
WO2011030819A1 (ja) | 液晶表示装置 | |
WO2019037291A1 (zh) | 液晶显示装置驱动方法 | |
US20080259014A1 (en) | Liquid crystal display device | |
US7928943B2 (en) | Liquid crystal display | |
US9830873B2 (en) | Liquid crystal display including reactive mesogen alignment layer and a blue pixel with a decreased maximum gray level and driving method thereof | |
WO2019037294A1 (zh) | 液晶显示装置驱动方法 | |
CN107045234B (zh) | 液晶显示面板及显示控制方法 | |
JP2004318112A (ja) | 液晶表示装置および電子機器 | |
WO2019037295A1 (zh) | 液晶显示装置 | |
WO2019037290A1 (zh) | 液晶显示装置 | |
WO2019037292A1 (zh) | 液晶显示装置 | |
WO2012093630A1 (ja) | 液晶表示装置 | |
US8115896B2 (en) | Liquid crystal display and driving method thereof | |
WO2007108436A1 (ja) | 液晶表示装置 | |
WO2019037296A1 (zh) | 液晶显示装置驱动方法 | |
Tien et al. | P‐128: Improved Picture Quality on Analog Dual‐Data Type Multi‐Domain Polymer Sustained Alignment LCD Technology | |
JPH0545636A (ja) | 液晶表示素子 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 17922856 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 17922856 Country of ref document: EP Kind code of ref document: A1 |