CN114755857A - Display panel and display device - Google Patents
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- CN114755857A CN114755857A CN202210476084.0A CN202210476084A CN114755857A CN 114755857 A CN114755857 A CN 114755857A CN 202210476084 A CN202210476084 A CN 202210476084A CN 114755857 A CN114755857 A CN 114755857A
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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
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133512—Light shielding layers, e.g. black matrix
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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
- G02F1/134309—Electrodes characterised by their geometrical arrangement
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- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
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Abstract
The invention discloses a display panel and a display device, which comprise a first substrate, a second substrate and liquid crystal molecules, wherein the first substrate and the second substrate are oppositely arranged, and the liquid crystal molecules are clamped between the first substrate and the second substrate; the first substrate comprises black matrixes, and openings are formed among the black matrixes; the second substrate comprises a pixel electrode, the pixel electrode comprises a first electrode and a second electrode which are electrically connected, the first electrode is overlapped with the opening in the direction perpendicular to the light-emitting surface of the display panel, the second electrode is at least partially overlapped with the black matrix, and a space is arranged between the first electrode and the second electrode. According to the invention, the second electrode is independently arranged at the position corresponding to the black matrix, so that the quick response of liquid crystal molecules is realized on the premise of not influencing the penetration rate.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel and a display device.
Background
Currently, display technologies have penetrated various aspects of people's daily lives, and accordingly, more and more materials and technologies are used for display screens. The display panel is used as an important component of the display device to realize the display function of the display device. Nowadays, the mainstream Display screen mainly includes a liquid crystal Display panel and an Organic Light-Emitting Display panel (OLED). The liquid crystal display panel has advantages of lightness, thinness, low power consumption, low radiation and the like, and is widely applied to various fields. The liquid crystal display panel generally comprises a color film substrate and an array substrate which are arranged oppositely, and a liquid crystal layer between the color film substrate and the array substrate, wherein a black matrix and a color resistor are arranged on one side of the color film substrate close to the array substrate, an electric field between a pixel electrode and a common electrode in the display panel can deflect liquid crystal molecules, light rays generated by a backlight assembly can penetrate through the display panel after the liquid crystal molecules are deflected, the deflection degree of the liquid crystal molecules can be different by adjusting the size of the electric field, the light transmittance of the display panel is different when the deflection degree of the liquid crystal molecules is different, and the light quantity of the backlight assembly penetrating through the liquid crystal display panel is different, so that the display of images is realized. However, the position of the pixel opening edge of the liquid crystal display panel in the prior art has the problem of slow response speed of liquid crystal molecules, which affects the overall display effect of the display panel.
Therefore, it is desirable to provide a display panel for realizing fast response of liquid crystal molecules in the display panel.
Disclosure of Invention
In view of the above, the present invention provides a display panel and a display apparatus, so as to improve the response speed of the display panel.
In one aspect, the present invention provides a display panel, including a first substrate and a second substrate disposed opposite to each other, and liquid crystal molecules sandwiched between the first substrate and the second substrate;
the first substrate comprises black matrixes, and openings are formed among the black matrixes;
the second substrate comprises a pixel electrode, the pixel electrode comprises a first electrode and a second electrode which are electrically connected, the first electrode is overlapped with the opening in the direction perpendicular to the light-emitting surface of the display panel, the second electrode is at least partially overlapped with the black matrix, and a space is arranged between the first electrode and the second electrode.
In another aspect, the invention further provides a display device comprising the display panel.
Compared with the prior art, the display panel and the display device provided by the invention at least realize the following beneficial effects:
the display panel is a liquid crystal display panel and comprises a first substrate, a second substrate and liquid crystal molecules, wherein the first substrate and the second substrate are oppositely arranged, and the liquid crystal molecules are clamped between the first substrate and the second substrate; the first substrate comprises black matrixes, and openings are formed among the black matrixes; the second substrate comprises a pixel electrode, the pixel electrode comprises a first electrode and a second electrode which are electrically connected, the first electrode is overlapped with the opening in the direction perpendicular to the light-emitting surface of the display panel, the second electrode is at least partially overlapped with the black matrix, and a space is arranged between the first electrode and the second electrode. In the prior art, the liquid crystal at the edge of the opening is far away from the first electrode, so that quick response can not be realized.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic plan view of a display panel in the related art;
FIG. 2 is a cross-sectional view taken along line A-A' of FIG. 1;
FIG. 3 is a schematic plane structure diagram of a display panel according to the present invention;
FIG. 4 is a schematic plane structure diagram of another display panel provided by the present invention;
FIG. 5 is a schematic plane structure diagram of another display panel provided by the present invention;
FIG. 6 is a schematic plane structure diagram of another display panel provided by the present invention;
FIG. 7 is a cross-sectional view taken along line B-B' of FIG. 4;
FIG. 8 is a schematic plane structure diagram of another display panel provided by the present invention;
FIG. 9 is a cross-sectional view taken along line C-C' of FIG. 8;
FIG. 10 is a schematic plan view of a display panel according to another embodiment of the present invention;
FIG. 11 is a schematic plan view of a display panel according to still another embodiment of the present invention;
FIG. 12 is a schematic plan view of a display panel according to still another embodiment of the present invention;
FIG. 13 is an enlarged partial view of the area M in FIG. 12;
FIG. 14 is a further sectional view taken along line C-C' of FIG. 8;
FIG. 15 is a schematic plan view of a display panel according to another embodiment of the present invention;
FIG. 16 is a schematic plan view of a display panel according to another embodiment of the present invention;
FIG. 17 is a schematic view of another plan configuration provided by the present invention;
FIG. 18 is a schematic plan view of a display panel according to another embodiment of the present invention;
FIG. 19 is a schematic diagram of a planar structure of another display panel provided by the present invention;
FIG. 20 is a schematic plan view of a display panel according to another embodiment of the present invention;
FIG. 21 is a schematic plan view of still another display panel according to the present invention;
fig. 22 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In view of the slow response speed of the liquid crystal molecules of the display panel in the related art, the inventor has made a study on the related art, and referring to fig. 1 and fig. 2, fig. 1 is a schematic plane structure diagram of the display panel in the related art, fig. 2 is a cross-sectional view taken along a direction a-a' in fig. 1, a display panel 000 includes a color film substrate 01 and an array substrate 02 which are oppositely disposed, and the liquid crystal molecules 03 located between the color film substrate 01 and the array substrate 02, the color film substrate 01 includes a black matrix 04, an opening 05 is included between the black matrices 04, the array substrate 02 includes a pixel electrode 06 and a common electrode 021, the liquid crystal molecules 03 are deflected by an electric field between the pixel electrode 06 and the common electrode 021, light is emitted from the opening 05, and since an orthogonal projection of the pixel electrode 06 on a light emitting surface of the display panel is overlapped with the opening 05, an electric field at an edge of the opening 05 and a position corresponding to the black matrix 04 is weak, that is, the electric field for driving the rotation of the liquid crystal molecules 03b is weak, thereby causing the response of the liquid crystal molecules to be slow. In order to solve the problem of slow response of liquid crystal molecules in the related art, the cell thickness is usually reduced and liquid crystal parameters are adjusted, but the liquid crystal fast response realized by the above method at present brings loss of transmittance.
In order to solve the technical problem, the invention provides a display panel and a display device, which are used for realizing the quick response of liquid crystal on the premise of not losing the penetration rate. Specific embodiments of the display panel and the display device will be described in detail below.
Referring to fig. 3, 4, 5, 6 and 7, fig. 3 is a schematic plan structure view of a display panel provided by the present invention, fig. 4 is a schematic plan structure view of a display panel provided by the present invention, fig. 5 is a schematic plan structure view of another display panel provided by the present invention, fig. 6 is a schematic plan structure view of another display panel provided by the present invention, and fig. 7 is a cross-sectional view taken along direction B-B' in fig. 4.
The display panel 100 provided in this embodiment includes a first substrate 1 and a second substrate 2 that are disposed opposite to each other, and liquid crystal molecules 3 sandwiched between the first substrate 1 and the second substrate 2; the first substrate 1 includes black matrixes 4, the black matrixes 4 having openings 5 therebetween; the second substrate 2 includes a pixel electrode 6, the pixel electrode 6 includes a first electrode 7 and a second electrode 8 electrically connected, the first electrode 7 overlaps the opening 5 in a direction perpendicular to the light emitting surface 40 of the display panel, the second electrode 8 at least partially overlaps the black matrix 4, and a space 9 is provided between the first electrode 7 and the second electrode 8.
Specifically, fig. 3 and 4 show that the second electrode 8 partially overlaps the black matrix 4 in a direction perpendicular to the light emitting surface of the display panel, and the second electrode 8 partially overlaps the opening 5, and fig. 5 shows that the second electrode 8 is located inside the black matrix 4 in a direction perpendicular to the light emitting surface of the display panel, as long as the second electrode 8 partially overlaps the black matrix 4 in a direction perpendicular to the light emitting surface of the display panel.
Fig. 3 illustrates only four sub-pixels, and fig. 4 to 6 illustrate only one sub-pixel. The first electrode 7 in fig. 3, 4, and 5 is designed to be a vertical domain, the first electrode 7 in fig. 6 is designed to be a horizontal domain, and as for the first electrode 7, it may be a horizontal domain or a vertical domain, which is not specifically limited herein, optionally, the extending direction of the second electrode 8 preferably extends along the second direction Y, at this time, in a direction perpendicular to the light-emitting surface of the display panel, the area overlapping the black matrix 4 is larger, the area overlapping the opening 5 is smaller, or the area does not overlap the opening 5, so that the loss of transmittance is reduced as much as possible.
Alternatively, the Black Matrix (Black Matrix) is made of a material with high light-shielding property to separate the three primary colors of red, green and blue (color confusion prevention) in a color film layer (not shown), and to prevent light leakage, thereby improving the contrast of each color block, and the color film layer is optionally disposed in the same layer as the Black Matrix 4 and located in the opening 5 between the Black matrices 4. In addition, the black matrix can also cover signal traces or thin film transistors (not shown), and can cover the scan lines G extending along the first direction X and the data lines D extending along the second direction Y as shown in fig. 3 to 6. The pixel electrode 6 and the common electrode 21 may be made of Indium Tin Oxide (ITO) material to form a transparent conductive layer, and may also be made of other transparent materials, which is not limited herein.
Also shown in fig. 7 is the common electrode 21, and the electric field formed by the voltage difference between the pixel electrode 6 and the common electrode 21 drives the liquid crystal molecules 3 to deflect.
It should be noted that, in the present invention, the second electrode 8 may be disposed on the same layer as the first electrode 7, and when transmitting an electrical signal to the pixel electrode 6, the electrical signals of the second electrode 8 and the first electrode 7 are the same electrical signal, but a space 9 is provided between the second electrode 8 and the first electrode 7 which overlap with the front projection of the black matrix 4 on the plane where the light-emitting surface 40 of the display panel is located, and it is not caused by a process error when the first electrode 7 is manufactured to overlap with the black matrix 4, nor is it caused by a simple process error when the first electrode 7 is manufactured to have a larger area so as to overlap with the black matrix 4. The second electrode 8 is provided separately in the present invention in order to provide an electric field capable of deflecting the liquid crystal molecules 3 at a position corresponding to the black matrix 4. Optionally, during manufacturing, the second electrode 8 may be manufactured from the same material and by the same process as the first electrode 7, so that the manufacturing process can be simplified, and the production cost can be reduced.
Compared with the prior art, the display panel 100 of the embodiment has at least the following beneficial effects:
in the invention, the orthographic projection of the first electrode 7 on the light-emitting surface 40 of the display panel is only overlapped with the opening 5, the orthographic projection of the second electrode 8 on the light-emitting surface 40 of the display panel is partially overlapped with the orthographic projection of the black matrix 4 on the light-emitting surface 40 of the display panel, the liquid crystal molecules 3b at the edge of the opening 5 and the liquid crystal molecules 3b at the position corresponding to the black matrix 4 also have electric fields to rotate, the rotation of the liquid crystal molecules 3b does not follow the rotation of the liquid crystal molecules 3a, but the electric field between the second electrode 8 and the common electrode 21 is driven, and the electric field intensity of the whole liquid crystal molecules in a pixel is optimized by enhancing the rotation of the liquid crystal molecules at the position corresponding to the black matrix, so that the quick response of the liquid crystal molecules 3 is realized.
On the other hand, the orthographic projection of the second electrode 8 on the light-emitting surface 40 of the display panel is partially overlapped with the orthographic projection of the black matrix 4 on the light-emitting surface 40 of the display panel, the overlapping area with the opening 5 is smaller, or the overlapping area with the opening 5 is avoided, so that the loss of the whole transmittance of the display panel can be reduced.
In some alternative embodiments, referring to fig. 8, fig. 8 is a schematic plane structure diagram of another display panel provided by the present invention, fig. 9 is a cross-sectional view along direction C-C' in fig. 8, the second electrode 8 includes a main portion 10 and a plurality of protruding portions 11, the protruding portions 11 are connected to the main portion 10, and the protruding portions 11 and the main portion 10 have an included angle α, where α > 0 °.
Specifically, in fig. 8, only the first electrode 7 is taken as an example of a vertical domain, but may be a transverse domain, and the domain direction of the first electrode 7 is not specifically limited here. The second electrode 8 is located within the black matrix 4 in a direction perpendicular to the plane of the light-emitting surface of the display panel, but the second electrode 8 may also partially overlap the black matrix 4, which is not shown here. Optionally, the protrusion portion 11 and the main portion 10 are made of the same material in the same layer, so that the manufacturing process is simplified, and the production cost is reduced.
The number and shape of the convex portions 11 are not specifically limited in this embodiment, and the number of the convex portions 11 and the shape of the convex portions 11 in fig. 8 are merely illustrative. Of course, the included angle α between the main portion 10 and the protrusion 11 can be also referred to as the included angle α in fig. 13.
In this embodiment, the included angle α between the trunk portion 10 and the protrusion 11 is greater than 0 °, that is, the protrusion 11 is not parallel to the trunk portion 10, and along the extending direction of the trunk portion 10, the plurality of protrusions 11 divide the region corresponding to the black matrix 4 into a plurality of small regions, referring to fig. 9, the protrusion 11 and the common electrode 21 form an electric field for driving the liquid crystal molecules 3c to deflect, and each small region has an electric field capable of driving the liquid crystal molecules 3c to rotate, so that the liquid crystal molecules 3c are more easily driven, thereby contributing to the improvement of the response speed.
It should be noted that, compared to designing the second electrode 8 as a whole block electrode, if the second electrode 8 is a whole block electrode, since the driving area is larger, some liquid crystal molecules 3 are driven to rotate, the response speed is relatively slow, and in this embodiment, the driving area is divided into a plurality of small areas by the plurality of protrusions 11, the liquid crystal molecules 3c are more easily driven, and the whole electric field intensity in the pixel is more favorably optimized by enhancing the rotation of the liquid crystal molecules at the corresponding positions of the black matrix.
In some alternative embodiments, referring to fig. 10, fig. 10 is a schematic plane structure diagram of another display panel provided by the present invention, and an extending direction of the trunk portion 10 in fig. 10 is the same as an extending direction of the first electrode 7.
In fig. 10, only the first electrode 7 is schematically illustrated as a vertical domain, and the first electrode 7 extends along the second direction Y, which is the same as the extending direction of the data line D in the display panel 100, and when the pixel electrode 6 is manufactured, the trunk portion 10 of the second electrode 8 is disposed in the same direction as the first electrode 7, and can be manufactured by using the same mask, so that the production cost can be reduced. Of course, the first electrode 7 may also be a transverse domain, the trunk portion 10 of the second electrode 8 extends along the second direction Y, and at this time, the plurality of protrusions 11 extend along the second direction Y, as long as the region corresponding to the black matrix 4 can be divided into a plurality of small regions, and if the protrusions 11 divide the liquid crystal molecules into a plurality of small regions, each small region has an electric field capable of driving the liquid crystal molecules to rotate, so that the liquid crystal molecules are more easily driven, and by enhancing the rotation of the liquid crystal molecules at the corresponding position of the black matrix, the overall electric field intensity in the pixel is more favorably optimized, thereby contributing to the improvement of the response speed.
In some alternative embodiments, referring to fig. 11, fig. 11 is a schematic plan view illustrating a display panel according to still another embodiment of the present invention, in fig. 11, the display panel 100 further includes a scan line G extending along a first direction X, and a data line D extending along a second direction Y, where the first direction X and the second direction Y intersect; the extending direction of the main portion 10 is the second direction Y, and the extending direction of the protruding portion 11 is the first direction X.
The first electrode 7 in fig. 11 has a vertical domain structure, the second electrode 8 extends in the second direction Y in the same direction as the data line D, and the protrusion 11 extends in the first direction X in the same direction as the scan line G, in other words, the second electrode 8 has a horizontal domain structure as a whole. The response speed of the transverse domain structure to the liquid crystal molecules 3 is higher than that of the vertical domain structure, simulation experiments are carried out on the structure in fig. 11 and the related technology in fig. 1 by the inventor, and the simulation results show that the response time of the liquid crystal in the related embodiment is 23.21ms, and the response time of the liquid crystal in the embodiment is 22.78 ms.
Of course, the main portion 10 extends along the second direction Y, the plurality of protruding portions 11 extends along the first direction X, the plurality of protruding portions 11 divide the area corresponding to the black matrix 4 into a plurality of small areas, the protruding portions 11 and the common electrode 21 form an electric field for driving the black matrix 4 and the liquid crystal molecules 3 at the edge of the opening 5 to deflect, and each small area has an electric field capable of driving the liquid crystal molecules to rotate, so that the liquid crystal molecules are more easily driven, and by enhancing the rotation of the liquid crystal molecules at the corresponding position of the black matrix, the overall electric field intensity in the pixel is more favorably optimized, thereby contributing to improving the response speed.
In some alternative embodiments, referring to FIGS. 12 and 13, FIG. 12 is a schematic plan view of a display panel of the present invention, FIG. 13 is a partially enlarged view of the area M in FIG. 12, and FIG. 13 only shows the structure of the second electrode 8, wherein the angle α is 60 ≦ α ≦ 100 in the direction from the stem 10 to the protrusion 11.
The scanning lines G and the data lines D are not shown in fig. 12 and 13, and the liquid crystal molecules 3 are shown in the initial position by the dotted lines and in the rotated position by the solid lines in fig. 12 and 13, and assuming that the liquid crystal molecules 3 are negative liquid crystals, the negative liquid crystals are rotated in a direction perpendicular to the electric field by the electric field. Assuming that the alignment direction P of the liquid crystal is the first direction X, the first electrode 7 is arranged as a vertical domain along the second direction Y, and thus, as shown in fig. 12, the liquid crystal molecules 3 in the opening 5 are rotated in one direction as a whole. While the second electrode 8 below the black matrix 4 is a horizontal domain, and includes a main portion 10 and a protrusion portion 11, so there are electric fields in multiple directions, and the rotation angles of the liquid crystal molecules 3 are different, referring to fig. 13, as can be seen from fig. 13, the electric field between the protrusion portion 11 and the common electrode 21 (not shown in fig. 12) drives the liquid crystal molecules 3 to rotate, the main portion 10 also forms an electric field with the common electrode 21 to drive the liquid crystal molecules 3 to rotate, and the angle that the electric field Q of the protrusion portion 11 drives the liquid crystal molecules 3 to rotate is smaller than the angle that the electric field R of the main portion 10 drives the liquid crystal molecules 3 to rotate, so the rotation speed of the liquid crystal molecules 3: the electric field Q of the protrusion 11 drives the liquid crystal molecules 3 to rotate faster, and the electric field R of the main portion 10 drives the liquid crystal molecules 3 to rotate slower, mainly the rotation angles of the liquid crystal molecules 3 are different.
In fig. 13, an angle between the protrusion 11 and the trunk 10 is illustrated as 90 °. Referring to fig. 13, in fig. 13, the alignment direction P of the liquid crystal molecules 3 is a first direction X, and along the counterclockwise direction, the included angle between the main portion 10 and the protrusion 11 is not too large or too small, and the included angle θ between the protrusion 11 and the alignment direction P is smaller, so that the rotation angle of the liquid crystal molecules 3 is smaller, and the response is faster, and at this time, the angle between the protrusion 11 and the main portion 10 is close to 90 °, but the transmittance of light is reduced, whereas, the larger the included angle between the protrusion 11 and the alignment direction P is, the larger the rotation angle of the liquid crystal molecules 3 is, and the response is slower, and at this time, the angle between the protrusion 11 and the main portion 10 is close to 180 °, but the transmittance is increased, so that the included angle α between the protrusion 11 and the main portion 10 can be properly adjusted, and the included angle between the optional protrusion 11 and the main portion 10 is changed between 60 ° and 100 °, which can increase the response time, the penetration rate can be improved.
Of course, the angle α between the protrusion 11 and the stem 10 is not too small, and the response of the too small liquid crystal molecules 3 is slow. Meanwhile, if the included angle α is too small, the process difficulty increases.
It should be noted that if the included angle α between the protrusion 11 and the trunk 10 is 45 °, although the length of the protrusion 11 is increased, that is, the area of the protrusion 11 is relatively large, the electric field intensity of the protrusion 11 is not increased, but the response time is slowed, on one hand, the electric field intensity of the protrusion 11 is related to the W/S ratio and the voltage magnitude, W is the width of the protrusion 11, and S is the distance between two protrusions 11. Therefore, under the condition that the W/S and the voltage are not changed, the electric field of the convex part 11 is not enhanced by only changing the angle of the convex part 11, and the response of the included angle alpha of 45 degrees is slower than that of the included angle alpha of 90 degrees, mainly because the included angle alpha is 45 degrees, the angle of the liquid crystal which needs to be rotated is larger. But the width of the convex part 11 can be increased, the distance between the two convex parts 11 is reduced, and the W/S is improved, so that the electric field intensity of the convex part 11 is improved, the liquid crystal molecule rotation at the corresponding position of the black matrix is enhanced, the whole electric field intensity in the pixel is better optimized, and the quick response of the liquid crystal molecules 3 is realized.
In some alternative embodiments, referring to fig. 14, fig. 14 is a cross-sectional view taken along the direction C-C' in fig. 8, further including a first alignment film 12 coated on a side of the first substrate 1 close to the second substrate 2 and a second alignment film 13 coated on a side of the second substrate 2 close to the first substrate 1, where the alignment angles of the first alignment film 12 and the second alignment film 13 are a second included angle β, and 60 ° + β ≦ α ≦ 100 ° + β.
Specifically, the alignment film functions to allow the liquid crystal molecules 3 to be uniformly aligned and oriented on a microscopic scale. In fig. 14, the first alignment film 12 and the second alignment film 13 are not pattern-filled. The first alignment film 12 is disposed on a side of the first substrate 1 close to the second substrate 2, the second alignment film 13 is disposed on a side of the second substrate 2 close to the first substrate 1, and the first alignment film 12 and the second alignment film 13 are usually formed by coating.
As described above, the initial position of the liquid crystal molecules 3 is the same as the alignment direction of the first alignment film 12 and the second alignment film 13, that is, when the alignment angle of the first alignment film 12 and the second alignment film 13 is β, the included angle between the pretilt angle of the liquid crystal molecules 3 and the first direction X is β, and at this time, if the liquid crystal is driven to rotate to a predetermined overlap, the included angle between the protrusion 11 and the main portion 10 needs to include the alignment angle, that is, 60 ° + β ≦ α ≦ 100 ° + β, which can improve the response time and the transmittance.
In some alternative embodiments, with continued reference to fig. 5, 6, 8, 10, 11, and 12, the orthographic projection of the second electrode 8 on the light-emitting surface of the display panel is located within the orthographic projection of the black matrix on the light-emitting surface of the display panel.
The second electrode 8 is separately manufactured, a space 9 is arranged between the second electrode 8 and the first electrode 7 which are overlapped with the orthographic projection of the black matrix 4 on the plane of the light-emitting surface of the display panel, the orthographic projection of the second electrode 8 on the light-emitting surface of the display panel is positioned in the orthographic projection of the black matrix 4 on the light-emitting surface of the display panel, on one hand, the position corresponding to the black matrix 4 also has an electric field capable of deflecting liquid crystal molecules 3, on the other hand, the orthographic projection of the second electrode 8 on the light-emitting surface of the display panel is not overlapped with the opening 5, so that the loss of transmissivity can be reduced, and the quick response of liquid crystal can be realized on the premise of not reducing the transmissivity.
With continued reference to fig. 7, 8, 10, 11 and 12, the protrusions 11 are distributed on a first side 14 and/or a second side 15 of the trunk 10, the first side 14 being located on a side of the second side 15 adjacent to the opening 5.
The trunk portion 10 includes a first side 14 and a second side 15 oppositely disposed along the first direction X, the first side 14 is located on a side of the second side 15 close to the opening 5, the protrusions 11 may be distributed on the first side 14 of the trunk portion 10, may be distributed on the second side 15 of the trunk portion 10, may be distributed on the first side 14 and the second side 15 of the trunk portion 10, the protrusions 11 are distributed on the first side 14 and the second side 15 of the trunk portion 10 in fig. 8 and 10, the protrusions 11 are distributed on the first side 14 of the trunk portion 10 in fig. 11 and 12, and the protrusions 11 are distributed on the second side 15 of the trunk portion 10 in fig. 7. Whether the protrusions 11 are distributed on the first side 14 or the second side 15 of the trunk portion 10, the liquid crystal molecules at the position of the black matrix 4 can be divided into a plurality of small regions, thereby achieving a fast response. Of course, in the case where the protrusions 11 are distributed on the first side 14 and the second side 15 of the trunk portion 10, the small area into which the liquid crystal molecules at the position of the black matrix 4 can be divided is more, and by increasing the rotation of the liquid crystal molecules at the corresponding position of the black matrix, the electric field intensity of the whole pixel can be optimized more easily, and the response is quicker.
In some alternative embodiments, with continued reference to fig. 8 and 10, the direction of extension of the projections 11 located on the first side 14 is collinear with the direction of extension of the projections 11 located on the second side 15.
In fig. 8 and 10, the protrusions 11 are distributed on the first side 14 and the second side 15 of the main portion 10, and at this time, the extending directions of the protrusions 11 on the first side 14 and the protrusions 11 on the second side 15 are on the same straight line, so that on one hand, the liquid crystal molecules at the position of the black matrix 4 can be divided into a plurality of small regions, and by enhancing the rotation of the liquid crystal molecules at the corresponding position of the black matrix, the overall electric field intensity in the pixel is optimized, thereby realizing fast response, and on the other hand, the fabrication is facilitated.
In some alternative embodiments, referring to fig. 15, fig. 15 is a schematic plan view of another display panel provided by the present invention, and in fig. 15, the protruding portions 11 on the first side 14 are staggered with the protruding portions 11 on the second side 15.
The convex parts 11 are distributed on the first side 14 and the second side 15 of the main part 10, at the moment, the convex parts 11 on the first side 14 and the convex parts 11 on the second side 15 are arranged in a staggered mode, on one hand, liquid crystal molecules at the position of the black matrix 4 can be divided into a plurality of small areas, and the liquid crystal molecules at the corresponding position of the black matrix are enhanced to rotate, so that the whole electric field intensity in the pixel is better optimized, quick response is realized, and on the other hand, the manufacture is facilitated.
In some alternative embodiments, with continuing reference to fig. 7, fig. 8, fig. 10, fig. 11, fig. 12, fig. 14, and fig. 16 and fig. 17, fig. 16 is a schematic plane structure diagram of another display panel provided by the present invention, and fig. 17 is a schematic plane structure diagram of another display panel provided by the present invention, in a direction perpendicular to the light emitting surface of the display panel, the shape of the protrusion 11 includes a rectangle, a triangle, or a diamond.
In fig. 7, 8, 10, 11, 12, and 14, the orthographic projection of the protrusion 11 on the light-emitting surface of the display panel is rectangular, in fig. 16, the orthographic projection of the protrusion 11 on the light-emitting surface of the display panel is triangular, in fig. 17, the orthographic projection of the protrusion 11 on the light-emitting surface of the display panel is rhombic, and in the direction perpendicular to the light-emitting surface of the display panel, the shape of the protrusion 11, whether rectangular, triangular, or rhombic, can divide the liquid crystal molecules at the position of the black matrix 4 into a plurality of small regions, thereby achieving fast response and facilitating manufacturing.
In some alternative embodiments, with continued reference to fig. 12, along the extending direction of the trunk portion 10, the distance between two adjacent protruding portions 11 is S, S is greater than or equal to 2 μm, and S is less than or equal to 3 μm, the width W of the protruding portion 11 is greater than or equal to 1 μm and less than or equal to 2 μm; the length L of the convex portion 11 in the extending direction of the convex portion 11 is 1 μm or more and 3.4 μm or less.
Referring to fig. 12, fig. 12 illustrates an example in which the protrusions are arranged on only one side of the trunk portion 10. It should be noted that, along the extending direction of the main portion 10, the distance S between two adjacent protrusions 11 cannot be too large or too small, if the distance S is too small, it is not favorable to divide the liquid crystal molecules 3 into a plurality of small regions, and the response time of the liquid crystal molecules 3 is reduced, if the distance S is too small, it is not favorable to manufacture, in this embodiment, S is greater than or equal to 2 μm, and S is less than or equal to 3 μm, which not only satisfies the manufacturing process, but also is favorable to divide the liquid crystal molecules 3 into a plurality of small regions, and realizes fast response of the liquid crystal. The width W of the protruding part 11 can not be too big too, can not too little too, the undersize is unfavorable for the preparation, the too big quantity of protruding part 11 so can reduce thereupon, the region that liquid crystal molecule 3 divide into is just also less, be unfavorable for realizing quick response, the width W of protruding part 11 more than or equal to 1 mu m less than or equal to 2 mu m in this implementation, can enough satisfy the preparation technology, do benefit to dividing liquid crystal molecule 3 into a plurality of small regions as much as possible again, rotate through the liquid crystal molecule of reinforcing black matrix corresponding position, more do benefit to and optimize holistic electric field intensity in the pixel, realize liquid crystal quick response. The length L of the protruding portion 11 cannot be too large, mainly because the width k of the trunk portion 10 and the length of the protruding portion 11 are not greater than the width of the black matrix 4, and the length L of the protruding portion 11 along the extending direction of the protruding portion 11 is greater than or equal to 1 μm and less than or equal to 3.4 μm, so that the orthographic projection of the protruding portion 11 and the main portion on the plane where the light emitting surface of the display panel is located can be ensured to be located in the black matrix 4, and the transmittance of light is not affected.
In some alternative embodiments, with continued reference to fig. 4, the pixel electrode 6 further includes a connection portion 16, and the first electrode 7 and the second electrode 8 are connected by the connection portion 16.
It is understood that the connection portion 16 may be disposed on the same layer as the first electrode 7 and the second electrode 8, and the connection portion 16 may also be disposed on a different layer from the first electrode 7 and the second electrode 8, which is not limited herein as long as the first electrode 7 and the second electrode 8 can be electrically connected. Preferably, the first electrode 7, the second electrode 8, and the connecting portion 16 are made of the same material in the same layer and are integrated, so that the manufacturing process can be simplified, the production cost can be reduced, and the overall thickness of the display panel 100 can be reduced.
In some alternative embodiments, with continuing reference to fig. 4, and with continuing reference to fig. 17 and 19, fig. 18 is a schematic plan structure diagram of another display panel provided by the present invention, and fig. 19 is a schematic plan structure diagram of another display panel provided by the present invention.
The first electrode 7 comprises a first end 17 and a second end 18, the second electrode 8 comprises a third end 19 and a fourth end 20, the first end 17 corresponds to the third end 19, and the second end 18 corresponds to the fourth end 20; the connection 16 is connected to a first terminal 17 and a third terminal 19, respectively, and/or the connection 16 is connected to a second terminal 18 and a fourth terminal 20.
In the present invention, the positions of the first terminal 17 and the second terminal 18, and the positions of the third terminal 19 and the fourth terminal 20 are not specifically limited, as long as the first terminal 17 corresponds to the third terminal 19, and the second terminal 18 corresponds to the fourth terminal 20. In fig. 4, 18 and 19, only the second end 18 is an end close to a via hole, which is used to electrically connect to a drain electrode of a thin film transistor (not shown).
In fig. 4, the connecting portion 16 is connected to the second end 18 and the fourth end 20, in fig. 18, the connecting portion 16 is connected to the first end 17 and the third end 19, in fig. 19, the connecting portion 16 is connected to the first end 17 and the third end 19, and in the meantime, the connecting portion 16 is connected to the second end 18 and the fourth end 20.
In fig. 4, the connection portion 16 is connected to the second terminal 18 and the fourth terminal 20, respectively, and in fig. 18, the connection portion 16 is connected to the first terminal 17 and the third terminal 19, respectively, both of which are capable of signal transmission, but it is needless to say that the voltages of the first electrode 7 and the second electrode 8 are kept the same.
In fig. 19, the connection portion 16 is respectively connected to the first end 17 and the third end 19, and the connection portion 16 is connected to the second end 18 and the fourth end 20, so that the voltages of the first electrode 7 and the second electrode 8 can be kept consistent, and this has the advantage that if the end (the first end 17 or the third end 19) far away from the via hole is broken during the process, the end close to the via hole can still provide an electrical signal for the second electrode 8, thereby improving the yield of the product; similarly, if the end near the via (the second end 18 or the fourth end 20) is broken, the end far from the via can still provide the electrical signal for the second electrode 8, so as to improve the yield of the product.
In some alternative embodiments, with continuing reference to fig. 7, the second substrate 2 further includes a common electrode 21 located on a side of the pixel electrode 6 away from the first substrate 1, the common electrode 21 includes a first sub-electrode 22 and a second sub-electrode 23, the first sub-electrode 22 and the first electrode 7 overlap, and the second sub-electrode 23 and the second electrode 8 overlap in a direction perpendicular to the light-emitting surface of the display panel.
Specifically, the common electrode 21 may be located on a side of the pixel electrode 6 away from the first substrate 1, and certainly, an insulating layer 24 is provided between the common electrode 21 and the pixel electrode 6, the common electrode 21 has a first sub-electrode 22 and a second sub-electrode 23, although fig. 7 only illustrates the common electrode 21 as an example of a whole structure, it is needless to say that the common electrode 21 is insulated between the first sub-electrode 22 and the second sub-electrode 23, that is, the first sub-electrode 22 and the second sub-electrode 23 respectively provide a voltage signal, a voltage difference between the first sub-electrode 22 and the first electrode 7 forms an electric field for driving the liquid crystal molecules 3 in the opening 5 to deflect, and a voltage difference between the second sub-electrode 23 and the second electrode 8 forms an electric field for driving the liquid crystal molecules 3 in the black matrix 4 to deflect.
In some alternative embodiments, with continued reference to fig. 7, the first sub-electrode 22 and the second sub-electrode 23 are a unitary structure.
The first sub-electrode 22 and the second sub-electrode 23 are of an integral structure, so that the common electrode 21 can be manufactured on the whole surface without carving seams, the manufacturing process can be simplified, and the production cost can be reduced.
In some alternative embodiments, with continuing reference to fig. 3, fig. 4, fig. 5, fig. 6, fig. 8, fig. 10, fig. 11, fig. 12, fig. 14, fig. 16, fig. 17, fig. 18, and fig. 20 and fig. 21, fig. 20 is a schematic plane structure diagram of another display panel provided by the present invention, fig. 21 is a schematic plane structure diagram of another display panel provided by the present invention, and the first electrode 7 includes a single domain, a double domain, or a pseudo-double domain.
The first electrodes 7 in fig. 4, 5, 6, 8, 10, 11, 12, 14, 16, 17, and 18 are all single domains, wherein the first electrodes 7 in fig. 4, 5, 8, 10, 11, 12, 14, 16, 17, and 18 are all vertical domains, the first electrode 7 in fig. 6 is a horizontal domain, the first electrode 7 in fig. 20 is a double domain, and the first electrode 7 in fig. 21 is a pseudo double domain.
The slits arranged on the first electrode 7 mean that the first electrode 7 has different domain directions, and the slits can induce liquid crystal molecules in different domains to fall to different directions, thereby improving the color shift. The first electrode 7 is in a single-domain structure, namely, the slits extend along one direction, the double-domain structure is in axial symmetry along the first direction X, the pseudo double-domain structure is in axial symmetry along the first direction X of the first electrodes 7 in the two openings 5 in the column direction, and no matter the first electrode 7 is in the single-domain structure, the double-domain structure or the pseudo double-domain structure, the second electrode 8 is arranged at the position corresponding to the black matrix 4, so that the second electrode 8 can control the liquid crystal at the edge position of the openings 5 of the black matrix 4 to quickly respond, and the electric field intensity of the whole pixel is optimized by enhancing the rotation of liquid crystal molecules at the corresponding position of the black matrix 4, thereby improving the response speed of the display panel 100.
In some optional embodiments, please refer to fig. 22, fig. 22 is a schematic structural diagram of a display device according to an embodiment of the present invention, and the display device 200 according to the embodiment includes the display panel 100 according to the above embodiment of the present invention. The embodiment of fig. 22 is only an example of a mobile phone, and the display device 200 is described, it is understood that the display device 200 provided in the embodiment of the present invention may be another display device 200 having a display function, such as a computer, a television, and a vehicle-mounted display device, and the present invention is not limited thereto. The display device 200 provided in the embodiment of the present invention has the beneficial effects of the display panel 100 provided in the embodiment of the present invention, and specific reference may be made to the specific description of the display panel 100 in each embodiment described above, and this embodiment is not described herein again.
According to the embodiment, the display panel and the display device provided by the invention at least realize the following beneficial effects:
the display panel is a liquid crystal display panel and comprises a first substrate, a second substrate and liquid crystal molecules, wherein the first substrate and the second substrate are oppositely arranged, and the liquid crystal molecules are clamped between the first substrate and the second substrate; the first substrate comprises black matrixes, and openings are formed among the black matrixes; the second substrate comprises a pixel electrode, the pixel electrode comprises a first electrode and a second electrode which are electrically connected, the first electrode is overlapped with the opening in the direction perpendicular to the light-emitting surface of the display panel, the second electrode is at least partially overlapped with the black matrix, and a space is arranged between the first electrode and the second electrode. In the prior art, the liquid crystal at the edge of the opening of the black matrix is far away from the first electrode, so that quick response cannot be realized.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (18)
1. The display panel is characterized by comprising a first substrate, a second substrate and liquid crystal molecules, wherein the first substrate and the second substrate are arranged oppositely, and the liquid crystal molecules are clamped between the first substrate and the second substrate;
the first substrate comprises black matrixes, and openings are formed among the black matrixes;
the second substrate comprises a pixel electrode, the pixel electrode comprises a first electrode and a second electrode which are electrically connected, the first electrode is overlapped with the opening in the direction perpendicular to the light emitting surface of the display panel, the second electrode is at least partially overlapped with the black matrix, and a gap is formed between the first electrode and the second electrode.
2. The display panel according to claim 1, wherein the second electrode comprises a trunk portion and a plurality of protruding portions connected to the trunk portion, and the protruding portions and the trunk portion have an included angle α, α > 0 °.
3. The display panel according to claim 2, wherein an extending direction of the trunk portion is the same as an extending direction of the first electrode.
4. The display panel according to claim 2, further comprising a scan line extending in a first direction, a data line extending in a second direction, the first direction and the second direction intersecting;
the extending direction of the main part is the second direction, and the extending direction of the bulge part is the first direction.
5. The display panel according to claim 2, wherein 60 ° ≦ α ≦ 100 ° in a direction pointing from the backbone portion toward the boss.
6. The display panel according to claim 2, further comprising a first alignment film coated on a side of the first substrate close to the second substrate and a second alignment film coated on a side of the second substrate close to the first substrate, wherein an alignment angle of the first alignment film and the second alignment film is a second included angle β, and 60 ° + β ≦ α ≦ 100 ° + β.
7. The display panel according to claim 1, wherein an orthographic projection of the second electrode on the light-emitting surface of the display panel is within an orthographic projection of the black matrix on the light-emitting surface of the display panel.
8. The display panel according to claim 2, wherein the protrusions are distributed on a first side and/or a second side of the main portion, and the first side is located on a side of the second side close to the opening.
9. The display panel according to claim 8, wherein an extending direction of the convex portion on the first side and an extending direction of the convex portion on the second side are on the same straight line.
10. The display panel according to claim 8, wherein the protrusions on the first side are staggered with the protrusions on the second side.
11. The display panel according to claim 2, wherein the shape of the protrusion comprises a rectangle, a triangle, or a diamond in a direction perpendicular to the light-emitting surface of the display panel.
12. The display panel according to claim 2, wherein a distance between two adjacent convex portions along an extending direction of the trunk portion is S, S is greater than or equal to 2 μm and less than or equal to 3 μm, and a width of the convex portion is greater than or equal to 1 μm and less than or equal to 2 μm; the length of the convex part along the extending direction of the convex part is more than or equal to 1 μm and less than or equal to 3.4 μm.
13. The display panel according to claim 1, wherein the pixel electrode further comprises a connection portion through which the first electrode and the second electrode are connected.
14. The display panel according to claim 1, wherein the first electrode comprises a first terminal and a second terminal, wherein the second electrode comprises a third terminal and a fourth terminal, wherein the first terminal corresponds to the third terminal, and wherein the second terminal corresponds to the fourth terminal;
the connecting part is respectively connected with the first end and the third end, and/or the connecting part is connected with the second end and the second end.
15. The display panel according to claim 1, wherein the second substrate further comprises a common electrode on a side of the pixel electrode away from the first substrate, the common electrode comprises a first sub-electrode and a second sub-electrode, the first sub-electrode and the first electrode overlap, and the second sub-electrode and the second electrode overlap in a direction perpendicular to a light-emitting surface of the display panel.
16. The display panel according to claim 15, wherein the first sub-electrode and the second sub-electrode are of a unitary structure.
17. The display panel of claim 1, wherein the first electrode comprises a single domain, a double domain, or a pseudo-double domain.
18. A display device comprising the display panel according to any one of claims 1 to 17.
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| JPH0915629A (en) * | 1995-07-03 | 1997-01-17 | Fujitsu Ltd | Liquid crystal display panel |
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| CN109752892A (en) * | 2019-03-20 | 2019-05-14 | 厦门天马微电子有限公司 | A kind of liquid crystal display panel and display device |
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| JPH0915629A (en) * | 1995-07-03 | 1997-01-17 | Fujitsu Ltd | Liquid crystal display panel |
| KR20150029436A (en) * | 2013-09-10 | 2015-03-18 | 삼성디스플레이 주식회사 | Display apparatus |
| KR20170064077A (en) * | 2015-11-30 | 2017-06-09 | 엘지디스플레이 주식회사 | In plane switching mode liquid crystal display device |
| CN206162021U (en) * | 2016-11-18 | 2017-05-10 | 厦门天马微电子有限公司 | Display panel and display device |
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