CN109243394B - Narrow viewing angle display method - Google Patents
Narrow viewing angle display method Download PDFInfo
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- CN109243394B CN109243394B CN201811280214.3A CN201811280214A CN109243394B CN 109243394 B CN109243394 B CN 109243394B CN 201811280214 A CN201811280214 A CN 201811280214A CN 109243394 B CN109243394 B CN 109243394B
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 65
- 239000011159 matrix material Substances 0.000 claims abstract description 19
- 230000005684 electric field Effects 0.000 claims description 61
- 239000010410 layer Substances 0.000 claims description 56
- 239000000758 substrate Substances 0.000 claims description 50
- 239000010409 thin film Substances 0.000 claims description 12
- 208000008918 voyeurism Diseases 0.000 claims description 12
- 239000010408 film Substances 0.000 claims description 11
- 230000000007 visual effect Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 9
- 125000006850 spacer group Chemical group 0.000 description 8
- 239000003086 colorant Substances 0.000 description 6
- 230000035807 sensation Effects 0.000 description 4
- 244000144985 peep Species 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- 230000006870 function Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
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- 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
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/1323—Arrangements for providing a switchable viewing angle
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal (AREA)
Abstract
A method for carrying out narrow visual angle display on a display panel comprises a plurality of pixels which are arranged in a matrix mode, wherein each pixel comprises a first sub-pixel, a second sub-pixel, a third sub-pixel and a fourth sub-pixel which are arranged in the matrix mode. According to the narrow visual angle display method, the liquid crystal torsion angles in the sub-pixels are different, and gray scale inversion can be effectively improved.
Description
Technical Field
The invention relates to the technical field of liquid crystal display, in particular to a narrow viewing angle display method.
Background
A Liquid Crystal Display (LCD) has advantages of good picture quality, small size, light weight, low driving voltage, low power consumption, no radiation, and relatively low manufacturing cost, and is dominant in the field of flat panel displays.
With the continuous progress of the liquid crystal display technology, the viewing angle of the display has been widened from about 120 ° to over 160 °, and people want to effectively protect business confidentiality and personal privacy while enjoying visual experience brought by a large viewing angle, so as to avoid business loss or embarrassment caused by the leakage of screen information. Therefore, in addition to the requirement of wide viewing angle, in many cases, the display device is required to have a function of switching between a wide viewing angle and a narrow viewing angle.
When the existing peep-proof display is used for displaying at a narrow visual angle, the peep-proof display is also provided with a vertical electric field besides a horizontal electric field which drives liquid crystal molecules to rotate in a horizontal plane, so that part of the liquid crystal molecules tilt, gray level differences can appear on pictures viewed from the upper right side and the lower right side of the peep-proof display, the gray level differences can not appear on the pictures viewed from the upper left side and the lower left side of the peep-proof display, and the problem of gray level inversion can appear on the peep-proof display when the narrow visual angle is displayed.
Disclosure of Invention
In view of the above, the present invention provides a narrow viewing angle display method, in which the liquid crystal twist angles in the sub-pixels are not the same, so as to effectively improve the gray scale inversion.
A method for carrying out narrow visual angle display on a display panel comprises a plurality of pixels which are arranged in a matrix mode, wherein each pixel comprises a first sub-pixel, a second sub-pixel, a third sub-pixel and a fourth sub-pixel which are arranged in the matrix mode.
In an embodiment of the present invention, when the display panel performs narrow viewing angle display, in a first half period of a frame of image, a first voltage is applied to the first sub-pixel and the fourth sub-pixel, and a second voltage is applied to the second sub-pixel and the third sub-pixel; in the second half period of one frame of image, the second voltage is applied to the first sub-pixel and the fourth sub-pixel, and the first voltage is applied to the second sub-pixel and the third sub-pixel.
In an embodiment of the present invention, the display panel includes a color film substrate, an array substrate, and a liquid crystal layer, the color film substrate is disposed opposite to the array substrate, the liquid crystal layer is disposed between the color film substrate and the array substrate, and the color film substrate is provided with a first peep-proof electrode and a second peep-proof electrode for controlling the display panel to perform narrow viewing angle display.
In an embodiment of the invention, a first vertical electric field is generated for the first sub-pixel and the fourth sub-pixel by the first peep-proof electrode, a second vertical electric field is generated for the second sub-pixel and the third sub-pixel by the second peep-proof electrode, and the first vertical electric field and the second vertical electric field have different electric fields.
In an embodiment of the invention, the first privacy electrode includes a plurality of first sub-electrode sheets and a plurality of second sub-electrode sheets, each of the first sub-electrode sheets is disposed in a first sub-pixel of each of the pixels, and each of the second sub-electrode sheets is disposed in a fourth sub-pixel of each of the pixels; the second peep-proof electrode comprises a plurality of third sub-electrode plates and a plurality of fourth sub-electrode plates, each third sub-electrode plate is arranged in the second sub-pixel of each pixel, and each fourth sub-electrode plate is arranged in the third sub-pixel of each pixel.
In an embodiment of the present invention, when the display panel performs narrow viewing angle display, in a first half period of a frame of image, the first sub-electrode sheet and the second sub-electrode sheet are used to generate a first vertical electric field, and the third sub-electrode sheet and the fourth sub-electrode sheet are used to generate a second vertical electric field; in the second half period of one frame of image, the first sub-electrode sheet and the second sub-electrode sheet are used to generate a second vertical electric field, and the third sub-electrode sheet and the fourth sub-electrode sheet are used to generate a first vertical electric field.
In an embodiment of the invention, the array substrate is provided with a plurality of scan lines and a plurality of data lines, the plurality of scan lines and the plurality of data lines intersect with each other to define a plurality of sub-pixels, and the sub-pixels are one of the first sub-pixels, the second sub-pixels, the third sub-pixels and the fourth sub-pixels.
In an embodiment of the present invention, the array substrate is provided with a common electrode, a pixel electrode and an insulating spacer layer, and the insulating spacer layer is disposed between the common electrode and the pixel electrode.
In an embodiment of the present invention, a thin film transistor is disposed in each of the sub-pixels, and the thin film transistor includes a gate electrode, a source electrode, and a drain electrode, the gate electrode is electrically connected to the scan line, the source electrode is electrically connected to the data line, and the drain electrode is electrically connected to the pixel electrode.
In an embodiment of the invention, the array substrate is provided with a plurality of scan lines and a plurality of data lines, the plurality of scan lines and the plurality of data lines intersect with each other to define a plurality of pixel regions, and the pixel regions are formed by combining two of the first sub-pixels, the second sub-pixels, the third sub-pixels and the fourth sub-pixels.
According to the narrow viewing angle display method, when the display panel performs narrow viewing angle display, a first voltage is applied to the first sub-pixel and the fourth sub-pixel, a second voltage is applied to the second sub-pixel and the third sub-pixel, and the first voltage and the second voltage are different in voltage magnitude, so that the liquid crystal torsion angle in the first sub-pixel and the fourth sub-pixel is different from the liquid crystal torsion angle in the second sub-pixel and the third sub-pixel. The torsion angles of the liquid crystal in the sub-pixels of the display panel are different, so that gray scale inversion can be effectively improved.
Drawings
Fig. 1 is a schematic structural diagram of a display panel according to a first embodiment of the present invention.
Fig. 2 is a schematic front view of an array substrate according to a first embodiment of the invention.
Fig. 3 is a schematic top view of the twist angle of the liquid crystal in a single pixel according to the first embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a color filter substrate according to a second embodiment of the present invention.
Fig. 5 is a schematic front view structure diagram of a color filter substrate according to a second embodiment of the present invention.
Fig. 6 is a schematic front view of a first peep-proof electrode according to a second embodiment of the present invention.
Fig. 7 is a schematic front view of a second privacy electrode according to a second embodiment of the present invention.
Fig. 8 is a schematic front view of the twist angle of the liquid crystal in a single pixel according to the second embodiment of the present invention.
Fig. 9 is a schematic structural diagram of a display panel according to a third embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
First embodiment
Fig. 1 is a schematic structural diagram of a display panel according to a first embodiment of the present invention, and fig. 2 is a schematic front structural diagram of an array substrate according to the first embodiment of the present invention. As shown in fig. 1 and 2, the display panel 100 of the present invention is an IPS-type or FFS-type liquid crystal display panel, i.e., the common electrode 14 and the pixel electrode 16 are formed on the same substrate (i.e., a thin film transistor array substrate). The following description is directed to the IPS type display panel 100. In this embodiment, the display panel 100 includes a plurality of pixels 101 arranged in a matrix, each pixel 101 includes a first sub-pixel 101a, a second sub-pixel 101b, a third sub-pixel 101c, and a fourth sub-pixel 101d, and the first sub-pixel 101a, the second sub-pixel 101b, the third sub-pixel 101c, and the fourth sub-pixel 101d are arranged in a matrix, wherein the first sub-pixel 101a and the second sub-pixel 101b are adjacent to each other on the left and right, and the third sub-pixel 101c and the fourth sub-pixel 101d are adjacent to each other on the left and right; the first subpixel 101a and the third subpixel 101c are disposed adjacent to each other up and down, and the second subpixel 101b and the fourth subpixel 101d are disposed adjacent to each other up and down. It should be noted that the pixel 101 is a point on the display panel 100 and an arbitrary area or position along the thickness direction of the display panel 100 corresponding to the point.
As shown in fig. 1, the display panel 100 includes an array substrate 10, a color filter substrate 20, and a liquid crystal layer 30. The array substrate 10 and the color filter substrate 20 are oppositely disposed in parallel, and the liquid crystal layer 30 is disposed between the array substrate 10 and the color filter substrate 20.
Further, the color filter substrate 20 is provided with a privacy electrode 22, a color resist layer 23, a black matrix 24(BM), and a planarization layer 25 on a surface close to the liquid crystal layer 30. The color resist layer 23 and the black matrix 24 are provided on the privacy electrode 22, the color resist layer 23 and the black matrix 24 are provided at an interval from each other, and the flat layer 25 is covered on the color resist layer 23 and the black matrix 24. The color resist layer 23 includes color resist materials of three colors of red (R), green (G), and blue (B), and the sub-pixels (sub-pixels) of the three colors of red, green, and blue are respectively formed correspondingly, and the sub-pixel is one of the first sub-pixel 101a, the second sub-pixel 101B, the third sub-pixel 101c, and the fourth sub-pixel 101 d. The black matrix 24 is disposed between the sub-pixels of three colors of red, green and blue, and the adjacent sub-pixels are spaced apart from each other by the black matrix 24, but not limited thereto, for example, the sub-pixels of three colors of red, green and blue are sequentially arranged in a tiled manner, and the black matrix 24 covers the tiled portion of the adjacent two sub-pixels. In this embodiment, the anti-peeping electrode 22 of the color filter substrate 20 is a planar electrode, and the anti-peeping electrode 22 can generate a vertical electric field to drive the liquid crystal molecules in the liquid crystal layer 30 to tilt up, so as to control the display panel 100 to perform anti-peeping display, thereby achieving the purpose of anti-peeping.
As shown in fig. 1, the array substrate 10 is provided with a gate insulating layer 11, an insulating protective layer 12, an insulating planarization layer 13, a common electrode 14, an insulating spacer layer 15, and a pixel electrode 16 on a surface close to a liquid crystal layer 30. The gate insulating layer 11 is formed on a surface of the array substrate 10 near the liquid crystal layer 30; an insulating protective layer 12 is disposed on the gate insulating layer 11; an insulating planarization layer 13 is provided on the insulating protection layer 12; the common electrode 14 is disposed on the insulating planarization layer 13; an insulating spacer layer 15 is provided on the common electrode 14; the pixel electrode 16 is disposed on the insulating spacer layer 15, i.e., the insulating spacer layer 15 is disposed between the common electrode 14 and the pixel electrode 16. The respective film layers of the array substrate 10 of the present invention are not limited thereto, and the structure and the order between the respective film layers may be appropriately adjusted.
As shown in fig. 1 and 2, the array substrate 10 is further provided with a scan line 17 and a data line 18, wherein the scan line 17 and the data line 18 intersect with each other to define a plurality of sub-pixels SP (sub-pixels) arranged in an array, and the sub-pixels are one of a first sub-pixel 101a, a second sub-pixel 101b, a third sub-pixel 101c and a fourth sub-pixel 101 d. A pixel electrode 16 and a thin film transistor 19(TFT) are provided in each of the sub-pixels 101a, 101b, 101c, 101d, and the thin film transistor 19 is located in the vicinity of a position where the scanning line 17 intersects the data line 18. Each thin film transistor 19 includes a gate electrode 192, a source electrode 193 and a drain electrode 194, wherein the gate electrode 192 is electrically connected to the corresponding scan line 17, the source electrode 193 is electrically connected to the corresponding data line 18, and the drain electrode 194 is electrically connected to the corresponding pixel electrode 16. The gate insulating layer 11 is formed on the surface of the array substrate 10 near the liquid crystal layer 30 and covers the scan lines 17 and the gate electrodes 192 of the thin film transistors 19, and the insulating protective layer 12 is positioned on the gate insulating layer 11 and covers the data lines 18 and the source electrodes 193 and the drain electrodes 194 of the thin film transistors 19. In the present embodiment, the insulating protection layer 12, the insulating planarization layer 13, and the insulating spacer layer 15 are provided with a via hole 102, the via hole 102 penetrates through the insulating protection layer 12, the insulating planarization layer 13, and the insulating spacer layer 15, the bottom of the via hole 102 exposes the drain 194 of the thin film transistor 19, and the pixel electrode 16 can be electrically connected to the drain 194 of the thin film transistor 19 through the via hole 102. The pixel electrode 16 includes a plurality of electrode bars 162, and the electrode bars 162 are spaced apart from each other.
In this embodiment, when the display panel 100 performs narrow viewing angle display, a first voltage is applied to the first sub-pixel 101a and the fourth sub-pixel 101d, and a second voltage is applied to the second sub-pixel 101b and the third sub-pixel 101c, where the first voltage and the second voltage have different voltages, so that the twist angle of the liquid crystal in the first sub-pixel 101a and the fourth sub-pixel 101d is different from the twist angle of the liquid crystal in the second sub-pixel 101b and the third sub-pixel 101 c. Preferably, the first voltage is smaller than the second voltage, that is, the electric field generated between the common electrode 14 and the pixel electrode 16 in the second sub-pixel 101b and the third sub-pixel 101c is larger than the electric field generated between the common electrode 14 and the pixel electrode 16 in the first sub-pixel 101a and the fourth sub-pixel 101d, so that the twist angle of the liquid crystal in the first sub-pixel 101a and the fourth sub-pixel 101d is different from the twist angle of the liquid crystal in the second sub-pixel 101b and the third sub-pixel 101 c.
Fig. 3 is a schematic top view of the twist angle of the liquid crystal in a single pixel according to the first embodiment of the present invention. As shown in fig. 1 and 3, a first direction X and a second direction Y perpendicular to each other in the horizontal plane are defined, and a third direction Z perpendicular to the horizontal plane is defined, that is, the third direction Z is perpendicular to the first direction X and the second direction Y, wherein the first direction X and the second direction Y are parallel to the display surface of the display panel 100; the third direction Z is parallel to the thickness direction of the display panel 100. When the display panel 100 performs narrow viewing angle display, a vertical electric field is generated between the array substrate 10 and the color filter substrate 20, and the vertical electric fields in the sub-pixels 101a, 101b, 101c, and 101d have the same magnitude, so that the angles between the liquid crystals (the long axis directions of the liquid crystal molecules) in the sub-pixels 101a, 101b, 101c, and 101d and the third direction Z are the same. Since the horizontal electric field in the second and third sub-pixels 101b and 101c is larger than the horizontal electric field in the first and fourth sub-pixels 101a and 101d, the twist angle of the liquid crystal in the second and third sub-pixels 101b and 101c is larger than the twist angle of the liquid crystal in the first and fourth sub-pixels 101a and 101d, that is, the angle between the liquid crystal (the long axis direction of the liquid crystal molecules) in the second and third sub-pixels 101b and 101c and the first direction X is larger than the angle between the liquid crystal in the first and fourth sub-pixels 101a and 101d and the first direction X, or the angle between the liquid crystal (the long axis direction of the liquid crystal molecules) in the second and third sub-pixels 101b and 101c and the second direction Y is larger than the angle between the liquid crystal in the first and fourth sub-pixels 101a and 101d and the second direction Y. Since the twist angles of the liquid crystal in the sub-pixels 101a, 101b, 101c, and 101d are not uniform, gray scale inversion can be effectively improved.
It should be noted that, when the display panel 100 performs narrow viewing angle display, a first voltage is applied to the first sub-pixel 101a and the fourth sub-pixel 101d in the first half period of a frame of image, a second voltage is applied to the second sub-pixel 101b and the third sub-pixel 101c, a second voltage is applied to the first sub-pixel 101a and the fourth sub-pixel 101d in the second half period of the frame of image, and the first voltage is applied to the second sub-pixel 101b and the third sub-pixel 101c, that is, the first voltage and the second voltage are switched back and forth during a frame of image, so that the occurrence of granular sensation in the image quality can be effectively avoided.
Second embodiment
Fig. 4 is a schematic structural diagram of a color filter substrate according to a second embodiment of the present invention. Fig. 5 is a schematic front view structure diagram of a color filter substrate according to a second embodiment of the present invention. As shown in fig. 4 and 5, the display panel 100 of the present embodiment has substantially the same structure as the display panel 100 of the first embodiment, but differs from the color filter substrate 20 in structure.
Specifically, as shown in fig. 4 and 5, the color filter substrate 20 is provided with a first privacy electrode 22a, a second privacy electrode 22b, a color resist layer 23, a black matrix 24(BM), a planarization layer 25, and an insulating layer 26 on a surface close to the liquid crystal layer 30. The first peep prevention electrode 22a is provided on the color resist layer 23 and the black matrix 24; an insulating layer 26 covers the first peep prevention electrode 22 a; the second peep-proof electrode 22b is provided on the insulating layer 26; the planarization layer 25 covers the second peep prevention electrode 22 b. The color resist layer 23 includes, for example, color resist materials of three colors of red (R), green (G), and blue (B), and sub-pixels (sub-pixels) of the three colors of red, green, and blue are respectively formed correspondingly, as shown in fig. 5. The red, green and blue sub-pixels are sequentially arranged in a splicing manner, and the black matrix 24 covers the splicing position of two adjacent sub-pixels. In this embodiment, the first anti-peeping electrode 22a and the second anti-peeping electrode 22b of the color film substrate 20 respectively apply different voltages, and the first anti-peeping electrode 22a and the second anti-peeping electrode 22b can generate a vertical electric field to drive liquid crystal molecules in the liquid crystal layer 30 to tilt up, so as to control the display panel 100 to perform anti-peeping display, thereby achieving the purpose of anti-peeping.
Fig. 6 is a schematic front view of a first peep-proof electrode according to a second embodiment of the present invention. As shown in fig. 4 and 6, the first peep-preventing electrode 22a includes a plurality of first sub-electrode pieces 221a and a plurality of second sub-electrode pieces 223 a. Each first sub-electrode piece 221a is arranged in the first sub-pixel 101a of each pixel 101, and the first sub-electrode piece 221a can generate a vertical electric field to drive the liquid crystal molecules in the first sub-pixel 101a to tilt; each second sub-electrode sheet 223a is disposed in the fourth sub-pixel 101d of each pixel 101, and the second sub-electrode sheet 223a can generate a vertical electric field to lift up the liquid crystal molecules in the fourth sub-pixel 101 d.
Fig. 7 is a schematic front view of a second privacy electrode according to a second embodiment of the present invention. As shown in fig. 4 and 7, the second privacy electrode 22b includes a plurality of third sub-electrode sheets 225b and a plurality of fourth sub-electrode sheets 227 b. Each third sub-electrode slice 225b is arranged in the second sub-pixel 101b of each pixel 101, and the third sub-electrode slices 225b can generate a vertical electric field to drive the liquid crystal molecules in the second sub-pixel 101b to tilt; each fourth sub-electrode plate 227b is disposed in the third sub-pixel 101c of each pixel 101, and the fourth sub-electrode plate 227b can generate a vertical electric field to lift the liquid crystal molecules in the third sub-pixel 101 c.
Fig. 8 is a schematic front view of the twist angle of the liquid crystal in a single pixel according to the second embodiment of the present invention. As shown in fig. 5 and 8, when the display panel 100 performs narrow viewing angle display, the first sub-electrode sheet 221a and the second sub-electrode sheet 223a generate a first vertical electric field, the third sub-electrode sheet 225b and the fourth sub-electrode sheet 227b generate a second vertical electric field, and the second vertical electric field is different from the first vertical electric field in magnitude, so that the twist angles of the liquid crystal in the sub-pixels 101a, 101b, 101c, and 101d are not consistent, and gray scale inversion can be effectively improved. When the second vertical electric field is greater than the first vertical electric field, the twist angle of the liquid crystal in the second sub-pixel 101b and the third sub-pixel 101c is greater than the twist angle of the liquid crystal in the first sub-pixel 101a and the fourth sub-pixel 101d, that is, the angle between the liquid crystal in the second sub-pixel 101b and the third sub-pixel 101c and the third direction Z is smaller than the angle between the liquid crystal in the first sub-pixel 101a and the fourth sub-pixel 101d and the third direction Z, as shown in fig. 8; when the second vertical electric field is smaller than the first vertical electric field, the twist angle of the liquid crystal in the second sub-pixel 101b and the third sub-pixel 101c is smaller than the twist angle of the liquid crystal in the first sub-pixel 101a and the fourth sub-pixel 101d, that is, the angle between the liquid crystal in the second sub-pixel 101b and the third sub-pixel 101c and the third direction Z is larger than the angle between the liquid crystal in the first sub-pixel 101a and the fourth sub-pixel 101d and the third direction Z.
When the second vertical electric field is different from the first vertical electric field, that is, the vertical electric fields of two adjacent sub-pixels are different, so that the two adjacent sub-pixels have a luminance difference, and thus the image quality has a granular sensation, when the display panel 100 performs narrow-viewing-angle display, in the first half period of a frame of image, the first sub-electrode sheet 221a and the second sub-electrode sheet 223a generate the first vertical electric field, and the third sub-electrode sheet 225b and the fourth sub-electrode sheet 227b generate the second vertical electric field; in the latter half period of one frame of image, the first sub-electrode piece 221a and the second sub-electrode piece 223a generate the second vertical electric field, and the third sub-electrode piece 225b and the fourth sub-electrode piece 227b generate the first vertical electric field, that is, in one frame of image time, the first vertical electric field and the second vertical electric field are switched back and forth, so that the image quality can be effectively prevented from generating granular sensation.
It should be noted that the positions of the first sub-electrode sheet 221a and the second sub-electrode sheet 223a of the first privacy electrode 22a are not limited to the above, for example, each first sub-electrode sheet 221a is disposed in the second sub-pixel 101b of each pixel 101; each second sub-electrode sheet 223a is provided in the third sub-pixel 101c of each pixel 101. The positions of the third sub-electrode sheet 225b and the fourth sub-electrode sheet 227b of the second privacy electrode 22b are not limited to the above, and for example, each third sub-electrode sheet 225b is disposed in the first sub-pixel 101a of each pixel 101, each fourth sub-electrode sheet 227b is disposed in the fourth sub-pixel 101d of each pixel 101, and the positions of the sub-electrode sheets 221a, 223a, 225b, 227b can be freely selected according to actual needs, so that the twist angles of the liquid crystal in the sub-pixels 101a, 101b, 101c, 101d are not uniform.
Third embodiment
Fig. 9 is a schematic structural diagram of a display panel according to a third embodiment of the invention. As shown in fig. 9, the display panel 100 of the present embodiment has substantially the same structure as the display panel 100 of the second embodiment, and is different in that a partial structure of the color filter substrate 20 is different.
Specifically, the first privacy electrode 22a and the second privacy electrode 22b of the color filter substrate 20 are disposed on the color resist layer 23 and the black matrix 24, that is, the first privacy electrode 22a and the second privacy electrode 22b are located on the same layer of the color filter substrate 20; the planarization layer 25 covers the first and second peep- prevention electrodes 22a and 22 b. For the structure and function of the first peep-proof electrode 22a and the second peep-proof electrode 22b, please refer to the second embodiment, which is not described herein again.
Fourth embodiment
The present invention also relates to a narrow viewing angle display method using the display panel 100 described above, the method comprising:
when the display panel 100 performs narrow viewing angle display, a first voltage is applied to the first sub-pixel 101a and the fourth sub-pixel 101d, and a second voltage is applied to the second sub-pixel 101b and the third sub-pixel 101c, wherein the first voltage and the second voltage have different voltages, so that the twist angle of the liquid crystal in the first sub-pixel 101a and the fourth sub-pixel 101d is different from the twist angle of the liquid crystal in the second sub-pixel 101b and the third sub-pixel 101 c.
In order to prevent the image quality from generating a graininess feeling due to the brightness difference between the adjacent two sub-pixels, when the display panel 100 performs narrow viewing angle display, in the first half period of one frame of image, a first voltage is applied to the first sub-pixel 101a and the fourth sub-pixel 101d, and a second voltage is applied to the second sub-pixel 101b and the third sub-pixel 101 c; in the second half period of one frame of image, the second voltage is applied to the first sub-pixel 101a and the fourth sub-pixel 101d, the first voltage is applied to the second sub-pixel 101b and the third sub-pixel 101c, and the first voltage and the second voltage are switched back and forth within one frame of image time.
Further, when the display panel 100 performs narrow viewing angle display, a first vertical electric field is generated by the first and second sub-electrode sheets 221a and 223a, and a second vertical electric field is generated by the third and fourth sub-electrode sheets 225b and 227b, and the magnitude of the second vertical electric field is different from that of the first vertical electric field.
In order to prevent the image quality from generating a granular sensation due to the brightness difference between the adjacent two sub-pixels, when the display panel 100 performs narrow viewing angle display, in the first half period of one frame of image, a first vertical electric field is generated by using the first sub-electrode sheet 221a and the second sub-electrode sheet 223a, and a second vertical electric field is generated by using the third sub-electrode sheet 225b and the fourth sub-electrode sheet 227 b; in the second half period of one frame of image, the first sub-electrode piece 221a and the second sub-electrode piece 223a are used to generate the second vertical electric field, the third sub-electrode piece 225b and the fourth sub-electrode piece 227b are used to generate the first vertical electric field, and the first vertical electric field and the second vertical electric field are used to switch back and forth within one frame of image time.
Fifth embodiment
The display panel 100 of the present embodiment has substantially the same structure as the display panel 100 of the first embodiment, and is different in the distribution area of the sub-pixels.
Specifically, a plurality of scan lines 17 and a plurality of data lines 18 are disposed on the array substrate 10, the plurality of scan lines 17 and the plurality of data lines 18 intersect with each other to define a plurality of pixel regions, the pixel regions are formed by combining two of the first sub-pixel 101a, the second sub-pixel 101b, the third sub-pixel 101c and the fourth sub-pixel 101d, for example, the first sub-pixel 101a and the second sub-pixel 101b form one pixel region, and the third sub-pixel 101c and the fourth sub-pixel 101d form another pixel region, and reference is made to the above embodiments for a control method of each of the sub-pixels 101a, 101b, 101c and 101d, which are not repeated herein. The display panel 100 of the embodiment can solve the problem of granular image quality without switching the electric field back and forth within one frame of image time.
In the narrow viewing angle display method of the present invention, by using the display panel 100, when the display panel 100 performs narrow viewing angle display, a first voltage is applied to the first sub-pixel 101a and the fourth sub-pixel 101d, and a second voltage is applied to the second sub-pixel 101b and the third sub-pixel 101c, wherein the first voltage and the second voltage have different voltages, so that the twist angle of the liquid crystal in the first sub-pixel 101a and the fourth sub-pixel 101d is different from the twist angle of the liquid crystal in the second sub-pixel 101b and the third sub-pixel 101 c. The display panel 100 of the invention has inconsistent twisting angles of liquid crystal in the sub-pixels 101a, 101b, 101c and 101d, and can effectively improve gray scale inversion.
The present invention is not limited to the specific details of the above-described embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention. The various features described in the foregoing detailed description may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
Claims (9)
1. A method for displaying a narrow viewing angle of a display panel, the display panel comprising a plurality of pixels arranged in a matrix, each of the pixels comprising a first sub-pixel, a second sub-pixel, a third sub-pixel and a fourth sub-pixel arranged in a matrix, the method comprising:
when the display panel performs narrow-view angle display, applying a vertical electric field to the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel, applying a first voltage to the first sub-pixel and the fourth sub-pixel, applying a second voltage to the second sub-pixel and the third sub-pixel, wherein the first voltage and the second voltage have different voltages, and the twist angle of liquid crystal in the first sub-pixel and the fourth sub-pixel is different from that in the second sub-pixel and the third sub-pixel;
the display panel comprises an array substrate, wherein a common electrode, a pixel electrode and an insulating spacing layer are arranged on the array substrate, the insulating spacing layer is arranged between the common electrode and the pixel electrode, and the first voltage and the second voltage are generated by the common electrode and the pixel electrode;
the first sub-pixel and the second sub-pixel are arranged adjacently left and right, and the third sub-pixel and the fourth sub-pixel are arranged adjacently left and right; the first sub-pixel and the third sub-pixel are arranged adjacently up and down, and the second sub-pixel and the fourth sub-pixel are arranged adjacently up and down.
2. The narrow viewing angle display method of claim 1, wherein during the narrow viewing angle display of the display panel, a first voltage is applied to the first sub-pixel and the fourth sub-pixel, and a second voltage is applied to the second sub-pixel and the third sub-pixel during a first half period of a frame of image; in the second half period of one frame of image, the second voltage is applied to the first sub-pixel and the fourth sub-pixel, and the first voltage is applied to the second sub-pixel and the third sub-pixel.
3. The narrow viewing angle display method of claim 2, wherein the display panel comprises a color film substrate and a liquid crystal layer, the color film substrate is disposed opposite to the array substrate, the liquid crystal layer is disposed between the color film substrate and the array substrate, and the color film substrate is provided with a first anti-peeping electrode and a second anti-peeping electrode for controlling the display panel to perform narrow viewing angle display.
4. The narrow viewing angle display method of claim 3, wherein the first privacy electrode generates a first vertical electric field for the first sub-pixel and the fourth sub-pixel, and the second privacy electrode generates a second vertical electric field for the second sub-pixel and the third sub-pixel, wherein the first vertical electric field and the second vertical electric field have different electric field magnitudes.
5. The narrow viewing angle display method according to claim 4, wherein the first privacy electrode comprises a plurality of first sub-electrode sheets and a plurality of second sub-electrode sheets, each of the first sub-electrode sheets being disposed in a first sub-pixel of each of the pixels, each of the second sub-electrode sheets being disposed in a fourth sub-pixel of each of the pixels; the second peep-proof electrode comprises a plurality of third sub-electrode plates and a plurality of fourth sub-electrode plates, each third sub-electrode plate is arranged in the second sub-pixel of each pixel, and each fourth sub-electrode plate is arranged in the third sub-pixel of each pixel.
6. The narrow viewing angle display method of claim 5, wherein the display panel generates a first vertical electric field using the first sub-electrode sheet and the second sub-electrode sheet, and generates a second vertical electric field using the third sub-electrode sheet and the fourth sub-electrode sheet during a first half period of one frame of image; in the second half period of one frame of image, the first sub-electrode sheet and the second sub-electrode sheet are used to generate a second vertical electric field, and the third sub-electrode sheet and the fourth sub-electrode sheet are used to generate a first vertical electric field.
7. The narrow viewing angle display method of claim 3, wherein the array substrate is provided with a plurality of scan lines and a plurality of data lines, the plurality of scan lines and the plurality of data lines are intersected with each other to define a plurality of sub-pixels, and the sub-pixel is one of the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel.
8. The narrow viewing angle display method of claim 7, wherein a thin film transistor is disposed in each of the sub-pixels, the thin film transistor includes a gate electrode, a source electrode and a drain electrode, the gate electrode is electrically connected to the scan line, the source electrode is electrically connected to the data line, and the drain electrode is electrically connected to the pixel electrode.
9. The narrow viewing angle display method of claim 3, wherein a plurality of scan lines and a plurality of data lines are disposed on the array substrate, the plurality of scan lines and the plurality of data lines intersect to define a plurality of pixel regions, and the pixel regions are formed by two of the first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel.
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| TW571165B (en) * | 2000-12-15 | 2004-01-11 | Nec Lcd Technologies Ltd | Liquid crystal display device |
| CN100343733C (en) * | 2005-01-31 | 2007-10-17 | 广辉电子股份有限公司 | Liquid crystal displaying device |
| KR20070070721A (en) * | 2005-12-29 | 2007-07-04 | 엘지.필립스 엘시디 주식회사 | Liquid crystal display device and driving method thereof |
| TWI328210B (en) * | 2006-05-19 | 2010-08-01 | Au Optronics Corp | Wide viewing angle lcd and driving method thereof |
| CN100419558C (en) * | 2006-11-27 | 2008-09-17 | 友达光电股份有限公司 | LCD panel and array base plate of active element thereof |
| CN100465739C (en) * | 2007-01-18 | 2009-03-04 | 友达光电股份有限公司 | Liquid crystal display and its driving method and electrode layout method |
| CN101017265A (en) * | 2007-03-12 | 2007-08-15 | 友达光电股份有限公司 | Control device of pixel and display device using same |
| TWI472858B (en) * | 2011-05-04 | 2015-02-11 | Au Optronics Corp | Liquid crystal display panel |
| TWI447496B (en) * | 2011-12-30 | 2014-08-01 | Au Optronics Corp | Display panel |
| CN103364999A (en) * | 2012-03-28 | 2013-10-23 | 瀚宇彩晶股份有限公司 | IPS (in-plane switching) liquid crystal display device |
| TWI509336B (en) * | 2013-10-23 | 2015-11-21 | Au Optronics Corp | Pixel unit, pixel array and liquid crystal display panel |
| TWI567725B (en) * | 2016-03-07 | 2017-01-21 | 友達光電股份有限公司 | Liquid crystal display panel and driving method thereof |
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| CN106646936B (en) * | 2016-11-02 | 2019-06-11 | 昆山龙腾光电有限公司 | Visual angle changeable liquid crystal display device and driving method |
| CN106932973B (en) * | 2017-04-18 | 2019-08-16 | 昆山龙腾光电有限公司 | The changeable liquid crystal display device in visual angle |
| CN107942590B (en) * | 2017-11-20 | 2020-07-28 | 昆山龙腾光电股份有限公司 | Array substrate, liquid crystal display device and driving method |
| CN108519697B (en) * | 2018-04-19 | 2021-06-22 | 昆山龙腾光电股份有限公司 | Display panel and display device |
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