CN115755471B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
- Publication number
- CN115755471B CN115755471B CN202211462500.8A CN202211462500A CN115755471B CN 115755471 B CN115755471 B CN 115755471B CN 202211462500 A CN202211462500 A CN 202211462500A CN 115755471 B CN115755471 B CN 115755471B
- Authority
- CN
- China
- Prior art keywords
- peep
- proof
- electrode
- display panel
- electrodes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000005684 electric field Effects 0.000 claims abstract description 61
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 31
- 239000000758 substrate Substances 0.000 claims abstract description 29
- 230000001154 acute effect Effects 0.000 claims abstract description 6
- 230000000007 visual effect Effects 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 11
- 239000000463 material Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- 239000011651 chromium Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000000265 homogenisation Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000059 patterning Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 244000144985 peep Species 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000004984 smart glass Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Abstract
The invention discloses a display panel and a display device, wherein the display panel comprises a substrate base plate, and a pixel electrode layer, a liquid crystal layer and a peep-proof electrode layer which are sequentially positioned at one side of the substrate base plate; the pixel electrode layer comprises a plurality of pixel electrodes which are arranged in an array, and the potential polarities of the pixel electrodes of the odd columns and the pixel electrodes of the even columns are opposite; the peep-proof electrode layer comprises a plurality of peep-proof electrodes, the peep-proof electrodes are arranged along a first direction, and the potential polarities of two adjacent peep-proof electrodes in the first direction are opposite; the first direction forms an acute angle with the column direction of the pixel electrode in the plane of the pixel electrode layer; along the thickness direction of the display panel, the projection of the peep-proof electrode is overlapped with two diagonal quadrant areas of the pixel electrode; wherein, the vertical superposition electric fields received by the sub-pixels corresponding to the two adjacent columns of pixel electrodes are opposite in direction. The influence of the electric field in the vertical direction among all the sub-pixels is homogenized, the display uniformity of the display panel is improved, and the visual flicker is reduced.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a display panel and a display device.
Background
Along with the continuous improvement of personal privacy concerns, users can not conveniently disclose information on a display screen to surrounding people in certain occasions, at the moment, the display screen is required to narrow the view angle, and the current peep-proof screen has the problems of poor picture uniformity and flickering.
Disclosure of Invention
The invention provides a display panel and a display device, wherein a certain inclination angle exists between the arrangement direction of a plurality of peep-proof electrodes and the whole row of pixel electrodes, the peep-proof electrodes are projected to cover two opposite angles of the pixel electrodes, and the potential polarities of two adjacent peep-proof electrodes are opposite, so that the influence of an electric field in the vertical direction among all sub-pixels is uniform, the display uniformity of the display panel is improved, and the visual flicker is reduced.
In a first aspect, an embodiment of the present invention provides a display panel, including a substrate, and a pixel electrode layer, a liquid crystal layer, and a peep-proof electrode layer sequentially located at one side of the substrate;
the pixel electrode layer comprises a plurality of pixel electrodes, the pixel electrodes are arranged in an array, and the potential polarities of the pixel electrodes in odd columns and the pixel electrodes in even columns are opposite;
the peep-proof electrode layer comprises a plurality of peep-proof electrodes, the peep-proof electrodes are arranged along a first direction, and the potential polarities of two adjacent peep-proof electrodes in the first direction are opposite; the included angle between the first direction and the column direction of the pixel electrode in the plane where the pixel electrode layer is located is an acute angle; along the thickness direction of the display panel, the projection of the peep-proof electrode is overlapped with two diagonal quadrant areas of the pixel electrode;
wherein, the vertical superposition electric fields received by the sub-pixels corresponding to the pixel electrodes in two adjacent columns are opposite in direction.
In a second aspect, an embodiment of the present invention further provides a display apparatus, where the display apparatus includes the display panel provided in the first aspect.
In summary, in the display panel provided by the embodiment of the invention, the polarities of the electric potentials of the pixel electrodes of the odd columns and the pixel electrodes of the even columns are opposite, the plurality of peep-proof electrodes are arranged along the first direction, and the arrangement direction of the plurality of peep-proof electrodes and the pixel electrodes of the whole columns are inclined at a certain angle, and the peep-proof electrodes are projected to cover two opposite angles of the pixel electrodes, and then the polarities of the electric potentials of the adjacent two peep-proof electrodes are opposite, so that the directions of the vertical superimposed electric fields received by the sub-pixels corresponding to the two adjacent columns of pixel electrodes are opposite, and the directions of the vertical superimposed electric fields are changed along with the voltage inversion of the pixel electrodes, so that the polarization of the two adjacent sub-pixels can be avoided, the uniformity of the electric field influence in the vertical direction among the sub-pixels is facilitated, the display uniformity of the display panel is improved, and the visual flicker is reduced.
Drawings
Fig. 1 is a schematic structural view of a display panel according to the related art;
FIG. 2 is a schematic top view of a display panel according to an embodiment of the present invention;
FIG. 3 is a schematic top view of another display panel according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of a display panel along the direction AA' in FIG. 2;
FIG. 5 is a schematic diagram showing the electric field direction of a display panel according to FIG. 2;
FIG. 6 is a schematic diagram showing the electric field of a display panel according to FIG. 2;
FIG. 7 is a schematic top view of another display panel according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of the electric field direction of a display panel provided in FIG. 7;
FIG. 9 is a schematic diagram showing the electric field of a display panel according to FIG. 7;
FIG. 10 is a schematic top view of another display panel according to an embodiment of the present invention;
FIG. 11 is a schematic top view of another display panel according to an embodiment of the present invention;
FIG. 12 is a schematic top view of another display panel according to an embodiment of the present invention;
fig. 13 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Fig. 1 is a schematic structural diagram of a display panel according to the related art. Referring to fig. 1, in the related art, a peep-proof electrode 10 is added in a color film substrate (CF side), and is disposed parallel and opposite to a pixel electrode 20 of a driving substrate (TFT side), and the peep-proof electrode 10 in the color film substrate (CF side) is controlled to input a constant voltage to perform a visual angle switching, so that an electric field formed between the peep-proof electrode 10 and the pixel electrode 20 deflects a liquid crystal in a vertical direction, thereby generating light leakage under a large visual angle to perform the peep-proof function. However, in the case of a column inversion type Liquid Crystal Display (LCD), the adjacent first and second sub-pixels 31 and 32 are subjected to the electric field E0 and the electric field E0', respectively, and the magnitudes of the electric field E1 and the electric field E2 are different. Specifically, taking 2.5V for the peep-proof electrode 11, +/-5V for the pixel electrode 12 and-0.1V for the common electrode 13 as an example, the first sub-pixel 31 receives an electric field E0' of 7.5V, and the second sub-pixel 32 receives an electric field E0 of 2.5V, which causes the problems of uneven visual effect of different pixel brightness in the same frame and different flicker of the same pixel brightness between different frames.
Based on the technical problems, the embodiment of the invention provides a display panel, a substrate, and a pixel electrode layer, a liquid crystal layer and a peep-proof electrode layer which are sequentially arranged on one side of the substrate. The pixel electrode layer comprises a plurality of pixel electrodes which are arranged in an array, and the potential polarities of the pixel electrodes of the odd columns and the pixel electrodes of the even columns are opposite; the peep-proof electrode layer comprises a plurality of peep-proof electrodes, the peep-proof electrodes are arranged along a first direction, and the potential polarities of two adjacent peep-proof electrodes in the first direction are opposite. The first direction forms an acute angle with the column direction of the pixel electrode in the plane of the pixel electrode layer. Along the thickness direction of the display panel, the projection of the peep-proof electrode is overlapped with two diagonal quadrant areas of the pixel electrode. By adopting the technical scheme, a certain inclination angle exists between the arrangement direction of the plurality of peep-proof electrodes and the pixel electrodes of the whole row, the peep-proof electrodes project and cover two opposite angles of the pixel electrodes, and the potential polarities of the two adjacent peep-proof electrodes are opposite, so that the directions of vertical superimposed electric fields received by the sub-pixels corresponding to the two adjacent rows of pixel electrodes are opposite, the influence of the electric fields in the vertical direction among the sub-pixels is uniform, the display uniformity of the display panel is improved, and the visual flicker is reduced.
The foregoing is the core idea of the present invention, and the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without making any inventive effort are intended to fall within the scope of the present invention.
FIG. 2 is a schematic top view of a display panel according to an embodiment of the present invention; FIG. 3 is a schematic top view of another display panel according to an embodiment of the present invention; FIG. 4 is a schematic cross-sectional view of a display panel along the direction AA' in FIG. 2; FIG. 5 is a schematic diagram illustrating an electric field direction of a display panel according to an embodiment of the present invention; FIG. 6 is a schematic diagram of the electric field of a display panel according to an embodiment of the present invention; FIG. 7 is a schematic top view of another display panel according to an embodiment of the present invention; FIG. 8 is a schematic diagram of the electric field direction of a display panel provided in FIG. 7; FIG. 9 is a schematic diagram showing the electric field of a display panel according to FIG. 7;
FIG. 10 is a schematic top view of another display panel according to an embodiment of the present invention; fig. 11 is a schematic top view of another display panel according to an embodiment of the invention. Referring to fig. 2 to 11, a display panel 200 according to an embodiment of the present invention includes a substrate 21, and a pixel electrode layer 30, a liquid crystal layer 40, and a peep-proof electrode layer 50 sequentially disposed on one side of the substrate 21. The pixel electrode layer 30 includes a plurality of pixel electrodes 31, the plurality of pixel electrodes 31 are arranged in an array, and polarities of potentials of the pixel electrodes 31 of the odd columns and the pixel electrodes 31 of the even columns are opposite. The peep-proof electrode layer 50 includes a plurality of peep-proof electrodes 51, the peep-proof electrodes 51 are arranged along a first direction (as indicated by a direction C in the figure), and the polarities of the potentials of two adjacent peep-proof electrodes 51 in the first direction (as indicated by the direction C in the figure) are opposite. The first direction (shown as direction C in the figure) forms an acute angle a with the column direction of the pixel electrode 31 in the plane of the pixel electrode layer 30. Along the thickness direction of the display panel (as shown in the Z direction in the drawing), the projection of the peep-proof electrode 51 overlaps with the two diagonal quadrant regions of the pixel electrode 31. Wherein, the vertical superposition electric fields received by the sub-pixels corresponding to the two adjacent columns of pixel electrodes 31 are opposite in direction.
Specifically, as shown in fig. 4, the substrate 21 of the display panel may be a rigid material such as glass or silicon wafer, or may be a flexible material such as ultra-thin glass, metal foil or polymer plastic material, and the flexible or rigid substrate 21 may block oxygen and moisture, so as to prevent moisture or impurities from diffusing into the display panel through the substrate 21. The display panel 200 further includes a driving circuit layer 22, a pixel electrode layer 30, a liquid crystal layer 40, and a peep-proof electrode layer 50 on one side of the substrate 21. The liquid crystal layer 40 contains liquid crystal molecules, and the liquid crystal molecules twist due to the electric field force to affect the transmittance, thereby realizing the image display of the display panel. The driving circuit layer 22 supplies a driving voltage to the pixel electrode layer 30, and the pixel electrode layer 30 includes a plurality of pixel electrodes 31, and the pixel electrodes 31 may include a metal such as aluminum (Al), silver (Ag), chromium (Cr), titanium (Ti), tantalum (Ta), molybdenum (Mo), etc., an alloy thereof, a nitride thereof, a conductive metal oxide, a transparent conductive material, etc.
As shown in fig. 2, 3, 7, 10, and 11, the plurality of pixel electrodes 31 are arranged in the X direction and the Y direction Cheng Zhenlie in the drawing, and the driving voltages of the pixel electrodes 31 in the same row or column are the same. In fig. 2 to 11, the pixel electrodes 31 in the odd columns and the pixel electrodes 31 in the even columns of a liquid crystal display panel (LCD) of the column inversion system are provided with opposite polarities of the potentials, taking the same driving voltage for the pixel electrodes 31 in the same column as an example. The voltage magnitudes of the pixel electrodes 31 of the odd columns and the even columns may be the same or different, and are not particularly limited herein. Illustratively, the voltage of the first pixel electrode 311 in the first column Y1 and the third column Y3 is set to +5v, and the voltage of the second pixel electrode 312 in the second column Y2 is set to-5V. The display substrate 200 corresponds to a plurality of sub-pixel regions arranged in an array, and the plurality of sub-pixel regions may be divided into a plurality of rows and a plurality of columns of sub-pixel regions. The row direction X of the plurality of sub-pixel regions is the arrangement direction of each sub-pixel region in each row of sub-pixel regions; the column direction Y of the plurality of sub-pixel regions is the arrangement direction of each sub-pixel region in each row of sub-pixel regions.
A peep-proof electrode layer 50 is added on a side of the liquid crystal layer 40 away from the pixel electrode layer 30, and the peep-proof electrode layer 50 is made of transparent conductive material such as Indium Tin Oxide (ITO). The plurality of peep-proof electrodes 51 are prepared by a patterning process, and a certain inclination angle alpha exists between the arrangement direction of the plurality of peep-proof electrodes 51 and the pixel electrodes 31 in the whole row, wherein alpha is an acute angle. As shown in the figure, a plurality of peep-proof electrodes 51 are arranged in order along the direction C in the figure, and the polarities of the potentials of two adjacent peep-proof electrodes 51 along the direction C in the figure are opposite.
For example, the first peep-proof electrode 511 and the second peep-proof electrode 512 are arranged at intervals, the voltage of the first peep-proof electrode 511 is-2.5V, and the voltage of the second peep-proof electrode 512 is +2.5v. Along the Z direction in the figure, the projection of each peep-proof electrode 51 on the plane of the pixel electrode layer 30 covers two diagonal quadrant regions of a pixel electrode 31, and by this structure arrangement, the same sub-pixel region can be affected by two peep-proof voltages with opposite polarities at the same time, which is beneficial to the homogenization of the electric field influence of the vertical direction between the sub-pixels. The diagonal quadrant areas refer to a first quadrant area and a third quadrant area of the peep-proof electrode 51 in an XY plane in the drawing, or a second quadrant area and a fourth quadrant area of the peep-proof electrode 51 in the XY plane in the drawing.
For example, the projection of the first privacy electrode 511 is inclined through the first diagonal quadrant region and the third diagonal quadrant region of the first pixel electrode 311 with the position coordinates (Y1, X1); the projection of the second peep-preventing electrode 512 is diagonally passed through the first and third diagonal quadrant regions of the second pixel electrode 312 having the position coordinates (Y2, X1) and the first and third diagonal quadrant regions of the first pixel electrode 311 having the position coordinates (Y1, X2). Here, the position coordinates are (Y1, X1) referring to the pixel electrode 31 located in the first column Y1 and in the first row X1, i.e., the first pixel electrode 311, and so on.
With the above arrangement, in the Z direction in the drawing, when the positions of the peep-proof electrode 51 and the pixel electrode 31 are opposite, the superimposed electric field applied to the liquid crystal molecules between the peep-proof electrode 51 and the pixel electrode 31 is strongest, as shown in the areas covered by the circle-marked areas in fig. 2, 3, 7, 10 and 11, and the superimposed electric field in other areas is weakened accordingly. Referring to fig. 5 and 6 again, the overlapping electric field action of the first pixel electrode 311 having the position coordinates (Y1, X1) and the second pixel electrode 312 having the position coordinates (Y2, X1) will be described below as an example.
Specifically, when the voltage of the first peep-proof electrode 511 is set to-2.5V and the voltage of the second peep-proof electrode 512 is set to +2.5V, the amplitude of the superimposed electric field E1 of the first diagonal quadrant region and the third diagonal quadrant region corresponding to the first pixel electrode 311 is set to +7.5V, and the electric field direction is along the Y positive direction; the magnitude of the superimposed electric field E2 of the second diagonal quadrant region and the fourth diagonal quadrant region corresponding to the first pixel electrode 311 is +2.5v, and the electric field direction is along the Y positive direction. The magnitude of the superimposed electric field E1' of the first diagonal quadrant region and the third diagonal quadrant region corresponding to the second pixel electrode 312 is +7.5v, and the electric field direction is along the negative Y direction; the magnitude of the superimposed electric field E2' of the second diagonal quadrant region and the fourth diagonal quadrant region corresponding to the second pixel electrode 312 is +2.5v, and the electric field direction is along the negative Y direction. At this time, the vertical superimposed electric field applied to the first sub-pixel A1 corresponding to the first pixel electrode 311 and the second sub-pixel A2 corresponding to the second pixel electrode 312 are opposite in direction. Referring to fig. 7 to 9, when the voltages of the pixel electrodes 31 in the first and second columns Y1 and Y2 are inverted, that is, the driving frame of the display panel 200 is inverted, the polarities of the electric fields of the vertical superimposed electric fields received by the first and second pixel electrodes 311 and 312 are also changed together, so that polarization of two adjacent sub-pixels can be avoided, and the uniformity of the electric field influence in the vertical direction between the sub-pixels is facilitated, thereby improving the display uniformity of the display panel and reducing visual flicker.
It should be noted that the display panel further includes other film layers, such as an alignment film, a polarizer, a packaging cover plate, etc., which cooperate to realize normal display of the display panel, which is not listed here; the term "patterning" as used herein refers specifically to a non-integral layer structure, i.e., a structure that is formed by forming an integral layer of material during the fabrication process and then etching a specific shape.
In summary, in the display panel provided by the embodiment of the invention, the polarities of the electric potentials of the pixel electrodes of the odd columns and the pixel electrodes of the even columns are opposite, the plurality of peep-proof electrodes are arranged along the first direction, and the arrangement direction of the plurality of peep-proof electrodes and the pixel electrodes of the whole columns are inclined at a certain angle, and the peep-proof electrodes are projected to cover two opposite angles of the pixel electrodes, and then the polarities of the electric potentials of the adjacent two peep-proof electrodes are opposite, so that the directions of the vertical superimposed electric fields received by the sub-pixels corresponding to the two adjacent columns of pixel electrodes are opposite, and the directions of the vertical superimposed electric fields are changed along with the voltage inversion of the pixel electrodes, so that the polarization of the two adjacent sub-pixels can be avoided, the uniformity of the electric field influence in the vertical direction among the sub-pixels is facilitated, the display uniformity of the display panel is improved, and the visual flicker is reduced.
In one possible embodiment, and with continued reference to fig. 2, 7 and 10, the privacy electrode 51 is a strip electrode and extends in a second direction (shown as direction D) that intersects the first direction (shown as direction C).
The stripe electrode refers to a shape of a stripe of orthographic projection of the peep preventing electrode 51 on the substrate 21 along the Z direction in the drawing. Specifically, the peep-proof electrodes 51 are strip electrodes, and the strip electrodes are divided into odd-even columns along the direction C in the figure, are arranged at two intervals and are electrically insulated, so that interference of signals applied to the peep-proof electrodes 51 can be avoided, and good stability of the signals in the peep-proof electrodes 51 is ensured.
Alternatively, as shown in fig. 2, 3, 7, and 10, each of the peep-preventing electrodes 51 is projected to overlap at most one of the pixel electrodes 31 in the same row or the same column in the thickness direction of the display panel (as shown in the Z-direction).
Specifically, the strip-shaped electrodes extend along the D direction in the figure and the projections along the Z direction in the figure pass through two opposite angles of the pixel electrode 31, which is favorable for forming a uniform vertical electric field between the peep-proof electrode 51 and the pixel electrode 31, so that the influence of the electric field in the vertical direction on each sub-pixel is uniform, and meanwhile, the control accuracy of the liquid crystal molecules corresponding to the sub-pixel region is favorable for improving, and the uniformity of the peep-proof mode display of the display panel is improved.
Alternatively, the voltage amplitudes of two adjacent privacy electrodes 51 in the first direction (shown as direction C) are the same. The same sub-pixel can be influenced by two peep-proof voltages with the same amplitude and opposite polarities at the same time, and the homogenization of the influence of the electric field in the vertical direction among the sub-pixels is facilitated. As shown in fig. 6 and 9, the sub-pixel A2 in the first column Y1 is affected by the peep-proof electrode 512 and the adjacent two peep-proof electrodes 511, for example, the sub-pixel A1 in the first column Y1 and the sub-pixel A2 in the second column Y2 are subjected to a relatively uniform electric field in the vertical direction by the sub-pixel A3 in the third column Y3.
With continued reference to fig. 3, one possible embodiment is shown in which the privacy electrode 51 includes a plurality of sub-privacy electrodes spaced apart along a second direction (direction D in the drawing); along the thickness direction of the display panel (as shown in the Z direction in the drawing), the projection of the sub-privacy electrode 51 overlaps a pair of corner quadrant regions of the pixel electrode 31. Wherein the second direction intersects the first direction (as shown in direction C).
Specifically, the first peep-proof electrode 511 includes a plurality of first sub-peep-proof electrodes 5111, the second peep-proof electrode 512 includes a plurality of second sub-peep-proof electrodes 5112, and the orthographic projection of the sub-peep-proof electrodes on the substrate 21 is circular, rectangular, etc. A plurality of sub-peep-proof electrodes are arranged at intervals along the direction D in the figure, and each sub-peep-proof electrode is projected to cover a pair of corner quadrant regions of the pixel electrode 31 along the middle Z direction. The same peep-preventing voltage is applied to the first sub-peep-preventing electrode 5111 or the second sub-peep-preventing electrode 5112 in the same row arranged along the direction D in the figure, the peep-preventing voltages with the same amplitude and opposite polarities are applied to the adjacent two peep-preventing electrodes 51 arranged along the direction C in the figure, and the plurality of sub-peep-preventing electrodes are electrically insulated. The structural design is beneficial to the uniformity of the electric field in the vertical direction received by the sub-pixel region corresponding to the pixel electrode 31, and is also beneficial to the improvement of the control accuracy of the liquid crystal molecules corresponding to the sub-pixel region and the improvement of the uniformity of the display panel peep-proof mode display.
Optionally, the plurality of peep-proof electrodes 51 are arranged at equal intervals along the first direction (as shown in the direction C in the figure). By this structural arrangement, it is advantageous that the sub-pixel region corresponding to the adjacent pixel electrode 31 is subjected to a uniform electric field.
As shown in fig. 2 and 3, the pixel electrode 31 is a U-shaped electrode, and the pixel electrode 31 includes a first sub-electrode portion 301, a second sub-electrode portion 302, and a third sub-electrode portion 303 connected in this order; along the thickness direction of the display panel (as shown in the Z direction in the drawing), the projection of the peep-proof electrode 51 overlaps with the end of the third sub-electrode portion 303, the connection end of the first sub-electrode portion 301 and the second sub-electrode portion 302.
As illustrated in fig. 2, 3 and 7, the U-shaped electrode means that the orthographic projection of the pixel electrode 31 on the substrate 21 along the Z-direction in the drawing is U-shaped. Referring to fig. 6, in the sub-pixel region corresponding to the first pixel electrode 311 with the position coordinates (Y1, X2), the superimposed electric field received by the end of the third sub-electrode 303 is 7.5V, the superimposed electric field received by the connection end of the first sub-electrode 301 and the second sub-electrode 302 is 7.5V, the superimposed electric field received by the end of the first sub-electrode 301 is 2.5V, the superimposed electric field received by the second sub-electrode 302 and the third sub-electrode 303 is 2.5V, and so on, the arrangement manner provided by the above embodiment is adopted by the peep-proof electrode 51, so that the superimposed electric fields received by the sub-pixel regions are uniformly distributed.
In one possible embodiment, as shown in fig. 10 and 11, the pixel electrode 31 is a circular electrode or a rectangular electrode (as shown); along the thickness direction of the display panel (as shown in the Z direction in the drawing), the peep-proof electrode 51 projects to cover the center of the pixel electrode 31.
As shown in fig. 10 and 11, the orthographic projection of the pixel electrode 31 on the substrate 21 along the Z direction in the drawing is circular or rectangular, and the peep-proof electrode 51 is disposed to cover the center of the pixel electrode 31 in a projection manner, so as to ensure that the electric field in the vertical direction received by the sub-pixel region corresponding to the pixel electrode 31 is uniform.
In a possible embodiment, the display panel 200 further includes a common electrode layer 220, and the common electrode layer 220 is located at a side of the pixel electrode layer 30 away from the liquid crystal layer 40, as shown in fig. 4; alternatively, the common electrode layer 220 is the same layer as the pixel electrode layer 30 (not shown in the drawing).
The display panel provided by the embodiment of the invention can be an In-Plane Switching (IPS) type liquid crystal display panel with multiple modes such as a fringe field Switching (Fringe Field Switching, FFS) type or an advanced super-dimensional field Switching (Advanced Super Dimension Switch, ADS) type. Illustratively, taking an FFS type liquid crystal display panel as an example, the FFS type liquid crystal display panel further includes a common electrode layer 220, as shown in fig. 4, in one possible embodiment, the pixel electrode layer 30 and the common electrode layer 220 of the FFS type liquid crystal display panel are located between the liquid crystal layer 40 and the substrate 21, and the common electrode layer 220 is located on a side of the pixel electrode layer 30 adjacent to the substrate 21; a possible embodiment is that the pixel electrode layer and the common electrode layer are arranged in the same layer and are electrically insulated. A horizontal electric field parallel to the plane defined by the substrate 21 may be generated between the pixel electrode 31 and the common electrode layer in the pixel electrode layer 30, and the liquid crystal molecules are controlled to deflect in a direction parallel to the plane defined by the substrate 21.
Fig. 12 is a schematic top view of another display panel according to an embodiment of the invention. On the basis of the above embodiment, as shown in fig. 4 and 12, optionally, the display panel 200 further includes a peep-proof driving circuit 60, and the peep-proof driving circuit 60 includes a first driving circuit 61 and a second driving circuit 62; as shown in fig. 2, 3, 10 and 11, the plurality of peep-proof electrodes 51 includes a first peep-proof electrode 511 and a second peep-proof electrode 512, and the first peep-proof electrode 511 and the second peep-proof electrode 512 are arranged at intervals along a first direction (as shown in a direction C in the drawing); the first driving circuit 61 is electrically connected to the first peep-proof electrode 511, and is used for providing a first peep-proof driving voltage; the second driving circuit 62 is electrically connected to the second peep-proof electrode 512, and is used for providing a second peep-proof driving voltage; the polarity of the first peep-proof driving voltage is opposite to that of the second peep-proof driving voltage.
Specifically, taking an FFS type liquid crystal display panel as an example, a first peep-preventing driving voltage with the same voltage value is applied to the first peep-preventing electrode 511 through the first driving circuit 61, a second peep-preventing driving voltage with the same voltage value is applied to the second peep-preventing electrode 512 through the second driving circuit 62, and voltages with the same magnitude and opposite polarities of the first peep-preventing driving voltage and the second peep-preventing driving voltage are applied, as shown in the figure, a voltage of ±2.5v is set. By matching the peep-proof electrode 51 and the common electrode layer 220, a vertical electric field perpendicular to the plane defined by the substrate 21 can be generated, and the vertical electric field acts on the liquid crystal molecules in the FFS liquid crystal layer 40, so that the liquid crystal molecules can deflect from the direction parallel to the plane defined by the substrate 21 to the direction perpendicular to the plane defined by the substrate 21, thereby reducing the contrast of the liquid crystal display panel in different directions, reducing the viewing angle of the liquid crystal display panel, and performing peep-proof protection on the image information displayed by the liquid crystal display panel.
Based on the same inventive concept, the embodiment of the invention also provides a display device. Fig. 13 is a schematic structural diagram of a display device according to an embodiment of the present invention, and as shown in fig. 13, the display device includes any one of the display panels provided in the foregoing embodiments. Illustratively, as shown in fig. 13, the display device 300 includes a display panel 200. Therefore, the display device also has the advantages of the display panel in the above embodiment, and the same points can be understood by referring to the explanation of the display panel, and the description thereof will not be repeated.
The display device 300 provided in the embodiment of the present invention may be a mobile phone as shown in fig. 13, or any electronic product with a display function, including but not limited to the following categories: television, notebook computer, desktop display, tablet computer, digital camera, smart bracelet, smart glasses, vehicle-mounted display, industrial control equipment, medical display screen, touch interactive terminal, etc., which is not particularly limited by the embodiment of the invention.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (12)
1. The display panel is characterized by comprising a substrate, and a pixel electrode layer, a liquid crystal layer and a peep-proof electrode layer which are sequentially positioned on one side of the substrate;
the pixel electrode layer comprises a plurality of pixel electrodes, the pixel electrodes are arranged in an array, and the potential polarities of the pixel electrodes in odd columns and the pixel electrodes in even columns are opposite;
the peep-proof electrode layer comprises a plurality of peep-proof electrodes, the peep-proof electrodes are arranged along a first direction, and the potential polarities of two adjacent peep-proof electrodes in the first direction are opposite; the included angle between the first direction and the column direction of the pixel electrode in the plane where the pixel electrode layer is located is an acute angle; along the thickness direction of the display panel, the projection of the peep-proof electrode is overlapped with two diagonal quadrant areas of the pixel electrode;
wherein, the vertical superposition electric fields received by the sub-pixels corresponding to the pixel electrodes in two adjacent columns are opposite in direction.
2. The display panel of claim 1, wherein the privacy electrode is a strip electrode and extends along a second direction, the second direction intersecting the first direction.
3. The display panel according to claim 2, wherein each of the peep-proof electrodes is projected to overlap with at most one of the pixel electrodes in the same row or the same column in a thickness direction of the display panel.
4. The display panel of claim 1, wherein the privacy electrode comprises a plurality of sub privacy electrodes spaced apart along the second direction; the second direction intersects the first direction.
5. The display panel of claim 4, wherein the sub-privacy electrode projections overlap one of the diagonal quadrant regions of the pixel electrode along a thickness direction of the display panel.
6. The display panel of claim 1, wherein a plurality of the privacy electrodes are equally spaced along the first direction.
7. The display panel according to claim 1, wherein the pixel electrode is a U-shaped electrode, the pixel electrode including a first sub-electrode portion, a second sub-electrode portion, and a third sub-electrode portion connected in this order;
along the thickness direction of the display panel, the peep-proof electrode projection overlaps with the end of the third sub-electrode portion, the connection end of the first sub-electrode portion and the second sub-electrode portion.
8. The display panel according to claim 1, wherein the pixel electrode is a circular electrode or a rectangular electrode;
and along the thickness direction of the display panel, the peep-proof electrode is projected to cover the center of the pixel electrode.
9. The display panel according to claim 1, further comprising a common electrode layer on a side of the pixel electrode layer away from the liquid crystal layer;
alternatively, the common electrode layer is the same layer as the pixel electrode layer.
10. The display panel according to claim 1, wherein the voltage magnitudes of two of the privacy electrodes adjacent in the first direction are the same.
11. The display panel of claim 1, further comprising a privacy drive circuit comprising a first drive circuit and a second drive circuit;
the plurality of peep-proof electrodes comprise a first peep-proof electrode and a second peep-proof electrode, and the first peep-proof electrode and the second peep-proof electrode are arranged at intervals along the first direction;
the first driving circuit is electrically connected with the first peep-proof electrode and is used for providing a first peep-proof driving voltage; the second driving circuit is electrically connected with the second peep-proof electrode and is used for providing a second peep-proof driving voltage; the polarity of the first peep-proof driving voltage is opposite to that of the second peep-proof driving voltage.
12. A display device comprising a display panel as claimed in any one of the preceding claims 1-11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211462500.8A CN115755471B (en) | 2022-11-21 | 2022-11-21 | Display panel and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211462500.8A CN115755471B (en) | 2022-11-21 | 2022-11-21 | Display panel and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115755471A CN115755471A (en) | 2023-03-07 |
| CN115755471B true CN115755471B (en) | 2024-03-15 |
Family
ID=85334582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211462500.8A Active CN115755471B (en) | 2022-11-21 | 2022-11-21 | Display panel and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115755471B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001235752A (en) * | 1999-06-25 | 2001-08-31 | Nec Corp | Multi-domain liquid crystal display device |
| CN1637541A (en) * | 2003-12-30 | 2005-07-13 | Lg.菲利浦Lcd株式会社 | Liquid crystal display device and method for manufacturing the same |
| KR20100007067A (en) * | 2008-07-11 | 2010-01-22 | 엘지디스플레이 주식회사 | Driving circuit for liquid crystal display device and method for driving the same |
| CN113064305A (en) * | 2021-05-08 | 2021-07-02 | 厦门技师学院(厦门市高级技工学校、厦门市高技能人才公共实训服务中心、厦门市劳动保护宣传教育中心) | Display panel |
| CN113270443A (en) * | 2020-02-17 | 2021-08-17 | 群创光电股份有限公司 | Electronic device |
| JP2022081145A (en) * | 2020-11-19 | 2022-05-31 | シャープ株式会社 | Liquid crystal display device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI328128B (en) * | 2006-03-17 | 2010-08-01 | Au Optronics Corp | Liquid crystal display |
| TWI633332B (en) * | 2017-07-25 | 2018-08-21 | 宏碁股份有限公司 | Driving method of privacy apparatus, privacy apparatus and manufacturing method of privacy apparatus |
-
2022
- 2022-11-21 CN CN202211462500.8A patent/CN115755471B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001235752A (en) * | 1999-06-25 | 2001-08-31 | Nec Corp | Multi-domain liquid crystal display device |
| CN1637541A (en) * | 2003-12-30 | 2005-07-13 | Lg.菲利浦Lcd株式会社 | Liquid crystal display device and method for manufacturing the same |
| KR20100007067A (en) * | 2008-07-11 | 2010-01-22 | 엘지디스플레이 주식회사 | Driving circuit for liquid crystal display device and method for driving the same |
| CN113270443A (en) * | 2020-02-17 | 2021-08-17 | 群创光电股份有限公司 | Electronic device |
| JP2022081145A (en) * | 2020-11-19 | 2022-05-31 | シャープ株式会社 | Liquid crystal display device |
| CN113064305A (en) * | 2021-05-08 | 2021-07-02 | 厦门技师学院(厦门市高级技工学校、厦门市高技能人才公共实训服务中心、厦门市劳动保护宣传教育中心) | Display panel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115755471A (en) | 2023-03-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10809551B2 (en) | Liquid crystal display device having switchable viewing angles and viewing angle switching method thereof | |
| US10338717B2 (en) | Liquid crystal display device | |
| CN107797343B (en) | Liquid crystal display device with switchable viewing angle and driving method thereof | |
| EP2743763B1 (en) | Pixel structure, array substrate, liquid crystal display panel and driving method | |
| US11269204B2 (en) | Viewing angle switchable liquid crystal display device and viewing angle switching method | |
| US20200159050A1 (en) | Method for driving liquid crystal display device capable of switching between wide viewing angle and narrow viewing angle | |
| US8736781B2 (en) | Liquid crystal display device and method of driving the same | |
| CN107966835B (en) | Array substrate, liquid crystal display device and driving method | |
| JP2006330634A (en) | Liquid crystal display apparatus | |
| JP2014102499A (en) | Display device and electronic equipment | |
| KR20020028477A (en) | Fringe field switching mode lcd | |
| CN108563078B (en) | Liquid crystal display device and driving method | |
| CN107422506B (en) | Array substrate and display panel | |
| CN107942590B (en) | Array substrate, liquid crystal display device and driving method | |
| CN110501840B (en) | Display panel with switchable viewing angles and display device | |
| US8115878B2 (en) | Thin film transistor array substrate and liquid crystal display | |
| CN108051963B (en) | Pixel structure, display panel and display device | |
| US7408610B2 (en) | Electro-optical apparatus and electronic device | |
| US7719651B2 (en) | In-plane switching liquid crystal display device | |
| CN108490696B (en) | Liquid crystal display device and visual angle switching method thereof | |
| US11231624B2 (en) | Pixel structure, display panel and display device | |
| CN108681160B (en) | Liquid crystal display panel and driving method thereof | |
| JP3774858B2 (en) | Liquid crystal display device and driving method thereof | |
| JP2010096796A (en) | Liquid crystal display device and electronic apparatus | |
| CN109633936B (en) | Liquid crystal display device and driving method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |