CN110018586B - Display panel, box aligning method thereof, display device and box aligning device - Google Patents
Display panel, box aligning method thereof, display device and box aligning device Download PDFInfo
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- CN110018586B CN110018586B CN201910465687.9A CN201910465687A CN110018586B CN 110018586 B CN110018586 B CN 110018586B CN 201910465687 A CN201910465687 A CN 201910465687A CN 110018586 B CN110018586 B CN 110018586B
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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
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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
- G02F1/133354—Arrangements for aligning or assembling substrates
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Abstract
The embodiment of the invention provides a display panel, a box aligning method of the display panel, a display device and a box aligning device, relates to the technical field of display, and can enable a first substrate and a second substrate in the display panel to be completely aligned. A display panel includes a first substrate and a second substrate; the peripheral area of the first substrate comprises at least one first alignment mark, and the peripheral area of the second substrate comprises second alignment marks corresponding to the first alignment marks in a one-to-one mode; the orthographic projection of the second alignment mark on the display surface of the display panel is completely overlapped with the orthographic projection of the first alignment mark on the display surface; the area of the first substrate, which is provided with the first alignment mark, is transparent, and the area of the second substrate, which is provided with the second alignment mark, is transparent; wherein the materials of the first alignment mark and the second alignment mark both comprise magneto-optical materials.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel, a box aligning method of the display panel, a display device and a box aligning device.
Background
Liquid crystal display devices are widely used to provide consumers with a lot of convenience.
The liquid crystal display device comprises an array substrate and a color film substrate, wherein the array substrate and the color film substrate are oppositely arranged to form a display panel. How to exactly and completely align the array substrate and the color film substrate is a problem to be solved urgently at present.
Disclosure of Invention
The embodiment of the invention provides a display panel, a box aligning method thereof, a display device and a box aligning device, which can enable a first substrate and a second substrate in the display panel to be completely aligned.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
in a first aspect, a display panel is provided, which includes a first substrate and a second substrate; the peripheral area of the first substrate comprises at least one first alignment mark, and the peripheral area of the second substrate comprises second alignment marks corresponding to the first alignment marks in a one-to-one mode; the orthographic projection of the second alignment mark on the display surface of the display panel is completely overlapped with the orthographic projection of the first alignment mark on the display surface; the area of the first substrate, which is provided with the first alignment mark, is transparent, and the area of the second substrate, which is provided with the second alignment mark, is transparent; wherein the materials of the first alignment mark and the second alignment mark both comprise magneto-optical materials.
Optionally, the display device further comprises a light shielding structure disposed on a side of the first substrate facing away from the second substrate; the light shielding structure is located in the peripheral area of the display panel, and the orthographic projection of the light shielding structure on the display surface completely covers the orthographic projection of the first alignment mark on the display surface.
Optionally, the magneto-optical material includes one of terbium gallium garnet ceramic, terbium aluminum garnet ceramic, and sesquioxide ceramic.
In a second aspect, a display device is provided, which includes the display panel of the first aspect.
In a third aspect, a box aligning device is provided, comprising a box aligning device, a magnetic field generator, a light emitter, and a light receiver; the box aligning device is used for aligning the first substrate and the second substrate; the peripheral area of the first substrate comprises at least one first alignment mark, the peripheral area of the second substrate comprises second alignment marks corresponding to the first alignment marks in a one-to-one mode, the shape and the size of the orthographic projection of the second alignment marks on the display surface of the display panel are the same as those of the orthographic projection of the first alignment marks on the display surface, and the materials of the first alignment marks and the second alignment marks comprise magneto-optical materials; the magnetic field generator applies a magnetic field to the first substrate and the second substrate, and the direction of the magnetic field is parallel to the thickness direction of the first substrate; the light emitter emits polarized light to the first substrate; the wavelength of the polarized light is in the range from the wavelength of ultraviolet light to the wavelength of infrared light; the light receiver receives the polarized light emitted from the second substrate and forms a projection pattern according to the polarized light emitted from the second substrate; if the shape of the projection image is the same as that of the first alignment mark, box alignment is completed; and if not, performing box alignment on the first substrate and the second substrate again according to the projected image until the shape of the projected image is the same as that of the first alignment mark.
Optionally, the light emitter comprises a light emitting structure and a first polarizer; the first polaroid is attached to the light-emitting surface of the light-emitting structure.
Optionally, the light receiver includes a camera and a second polarizer; the second polaroid is attached to the objective lens of the camera.
In a fourth aspect, a method for aligning a display panel is provided, which includes: the box aligning device aligns the first substrate and the second substrate; the peripheral area of the first substrate comprises at least one first alignment mark, the peripheral area of the second substrate comprises second alignment marks corresponding to the first alignment marks in a one-to-one mode, the shape and the size of the orthographic projection of the second alignment marks on the display surface of the display panel are the same as those of the orthographic projection of the first alignment marks on the display surface, and the materials of the first alignment marks and the second alignment marks comprise magneto-optical materials; a magnetic field generator applying a magnetic field to the first substrate and the second substrate, the direction of the magnetic field being parallel to a thickness direction of the first substrate; the light emitter emits polarized light to the first substrate; the wavelength of the polarized light is in the range from the wavelength of ultraviolet light to the wavelength of infrared light; the light receiver receives the polarized light emitted from the second substrate and forms a projection pattern according to the polarized light emitted from the second substrate; if the shape of the projection image is the same as that of the first alignment mark, box alignment is completed; and if not, performing box alignment on the first substrate and the second substrate again according to the projected image until the shape of the projected image is the same as that of the first alignment mark.
Optionally, the light emitter comprises a light emitting structure and a first polarizer; the first polaroid is attached to the light-emitting surface of the light-emitting structure.
Optionally, the light receiver includes a camera and a second polarizer; the second polaroid is attached to the objective lens of the camera.
The embodiment of the invention provides a display panel, a box aligning method of the display panel, a display device and a box aligning device. The materials of the first alignment mark and the second alignment mark comprise magneto-optical materials, and the magneto-optical materials can be displayed under the irradiation of ultraviolet light waves to infrared light waves. Meanwhile, under the action of an external magnetic field, polarized light from ultraviolet light wavelength to infrared light wavelength enters the first substrate and the second substrate, the polarization angles of the polarized light are deflected in the first substrate and the second substrate, so that a light receiver capable of receiving light rays with specific polarization angles is used for receiving the polarized light emitted from the second substrate, and whether the orthographic projection of the first alignment mark on the display surface and the orthographic projection of the second alignment mark on the display surface are completely overlapped or not is detected. If the shape of the projection image formed by the polarized light received by the light receiver is the same as that of the first alignment mark, whether the orthographic projection of the first alignment mark on the display surface and the orthographic projection of the second alignment mark on the display surface are completely overlapped or not is judged; otherwise, the position of the first substrate and/or the second substrate may be adjusted according to the shape of the projection image of the polarized light received by the light receiver, so that the orthographic projection of the first alignment mark on the display surface exactly and completely overlaps the orthographic projection of the second alignment mark on the display surface, that is, the first substrate and the second substrate are completely aligned.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a backlight module according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a backlight module according to an embodiment of the invention;
fig. 4 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a first substrate and a second substrate according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 7 is a diagram illustrating a transmission process of polarized light according to an embodiment of the present invention;
fig. 8 is a schematic flow chart of a box-to-box display panel according to an embodiment of the present invention.
Reference numerals:
1-a frame; 2-cover glass; 3-a liquid crystal display panel; 301-lower polarizer; 302-an upper polarizer; 31-a first substrate; 311-a first alignment mark; 32-a second substrate; 321-a second alignment mark; 33-a liquid crystal layer; 34-a light-shielding structure; 4-a backlight module; 41-an optical film; 42-a diffuser plate; 43-a light source; 44-a reflective sheet; 45-glue frame; 46-a back plate; 47-black glue; 48-a light guide plate; 5-a circuit board; 61-display area; 62-a peripheral zone; 7-a tie layer; 8-a light emitter; 81-a light emitting structure; 82-a first polarizer; 9-an optical receiver; 91-a camera; 92-second polarizer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Some embodiments of the present invention provide a display device, where the display device includes a mobile phone, a tablet computer, a Personal Digital Assistant (PDA), a vehicle-mounted computer, and the like, and the specific application of the display device is not particularly limited in the embodiments of the present invention.
The display device may be a liquid crystal display device, for example.
As shown in fig. 1 to 3, the lcd device includes a frame 1, a cover glass 2, a display panel 3, a lower polarizer 301, an upper polarizer 302, a backlight module 4, a circuit board 5, and other electronic components including a camera.
The frame 1 has a U-shaped longitudinal cross section, and the display panel 3, the lower polarizer 301, the upper polarizer 302, the backlight module 4, the circuit board 5 and other electronic components are disposed in the frame 1. The backlight module 4 is disposed below the display panel 3, the lower polarizer 301 is disposed between the display panel 3 and the backlight module 4, the circuit board 5 is disposed below the backlight module 4, the cover glass 2 is disposed on a side of the liquid crystal display panel 3 away from the backlight module 4, and the upper polarizer 302 is disposed between the display panel 3 and the glass cover glass 2.
The backlight module 4 may be a direct type backlight module or a side type backlight module.
Illustratively, as shown in fig. 2, the direct type backlight module includes a back plate 46, a frame 45, a light source 43 disposed on the back plate 46, a diffusion plate 42 disposed on the light source 43, and an optical film 41 disposed on the light emitting side of the diffusion plate 42. Further, a reflective sheet 44 disposed between the back plate 46 and the light source 43 may be further included.
Illustratively, as shown in fig. 3, the edge-type backlight module includes a back plate 46, a frame 45, a light guide plate 48 disposed on the back plate 46, an optical film 41 disposed on the light-emitting side of the light guide plate 48, and a light source 43 disposed on one side of the light guide plate 48. In addition, a reflective sheet 44 disposed between the back plate 46 and the light guide plate 48 may be further included.
The display panel 3 and the glue frame 45 may be fixed by black glue 47. The Light source may be, for example, a Light-Emitting Diode (LED). The light guide plate 48 has two sectional shapes of a wedge shape and a flat plate shape. The structure of the backlight module 4 in fig. 2 and 3 is only schematic and not limited at all.
An embodiment of the present invention provides a display panel 3, and the display panel 3 may be used as the display panel 3 in the above-described display device. As shown in fig. 4 and 5, the display panel 3 includes a first substrate 31 and a second substrate 32; the peripheral region 62 of the first substrate 31 includes at least one first alignment mark 311, and the peripheral region of the second substrate 32 includes second alignment marks 321 corresponding to the first alignment marks 311 one to one; the orthographic projection of the second alignment mark 311 on the display surface of the display panel is completely overlapped with the orthographic projection of the first alignment mark 311 on the display surface; the region of the first substrate 31 where the first alignment mark 311 is disposed is transparent, and the region of the second substrate 32 where the second alignment mark 321 is disposed is transparent; wherein the materials of the first alignment mark 311 and the second alignment mark 321 both comprise magneto-optical materials.
On this basis, as shown in fig. 1, the display panel 3 further includes a liquid crystal layer 33 disposed between the first substrate 31 and the second substrate 32. The first substrate 31 and the second substrate 32 are bonded together by the sealant, so that the liquid crystal layer 33 is limited in the region surrounded by the sealant. The first substrate 31 and the second substrate 32 further include a display region 61, and the peripheral region 62 is located at the periphery of the display region 61.
In some embodiments, the first substrate 31 is an array substrate, and the second substrate 32 is a cassette substrate; alternatively, the first substrate 31 is a cassette substrate, and the second substrate 32 is an array substrate.
The array substrate comprises a substrate, and a thin film transistor, a pixel electrode and a flat layer which are arranged on the substrate. In addition, the display panel further includes a color filter layer, a black matrix, and a common electrode. The color filter layer, the black matrix, and the common electrode may be disposed on the array substrate, or may be disposed on the opposing substrate.
In some embodiments, the specific position of the first alignment mark 311 in the first base board 31 is not limited, for example, the first base board 31 is an array base board, and the first alignment mark 311 may be disposed on a side of the substrate facing away from the second base board 32, or a side of the substrate facing toward the second base board 32, or a side of the flat layer facing away from the second base board 32, or a side of the flat layer facing toward the second base board 32, or the like.
Without limiting the specific position of the second alignment mark 321 in the second substrate 32, the second substrate 32 is, for example, a box substrate, the color filter layer is disposed on the second substrate 32, and the second alignment mark 321 may be disposed on a side of the color filter layer close to the first substrate 31.
In some embodiments, the shape of the first alignment mark 311 and the shape of the second alignment mark 321 are not defined. For example, the shape of the first alignment mark 311 and the shape of the second alignment mark 321 may be a cross, or a triangle, or a rectangle, etc.
Here, the shapes of the first alignment mark 311 and the second alignment mark 321 are always the same, and in the case where the first substrate 31 and the second substrate 32 are paired, orthographic projections of the first alignment mark 311 and the second alignment mark 321 on the display surface always completely overlap.
In some embodiments, the specific material of the first and second alignment marks 311 and 321 is not limited as long as the material has an optical information function with a magneto-optical effect in a range from ultraviolet wavelength to infrared wavelength, so that the first and second alignment marks 311 and 321 are visualized.
On the basis, under the action of an external magnetic field, when polarized light from ultraviolet waves to infrared waves passes through the first alignment mark 311, the polarization angle of the polarized light is deflected for the first time; then, when the polarized light whose polarization angle is first deflected passes through the second alignment mark 321, the polarization angle is second deflected.
Illustratively, the material of the first alignment mark 311 and the second alignment mark 321 is a magneto-optical ceramic material. For example terbium gallium garnet (Tb _3Ga _5O _ (12), TGG), terbium aluminum garnet (Tb _3Al _5O _ (12), TAG), or some sesquioxides such as terbium oxide (Tb _2O _3), holmium oxide (Ho _2O _3), dysprosium oxide (Dy _2O _ 3).
In some embodiments, the material of the first alignment mark 311 is the same as the material of the second alignment mark 321; alternatively, the material of the first alignment mark 311 is different from the material of the second alignment mark 321.
In some embodiments, the region of the first substrate 31 where the first alignment mark 311 is disposed should be transparent, so that light from ultraviolet wavelength to infrared wavelength can penetrate through the first substrate 31; the area of the second substrate 32 where the second alignment mark 321 is disposed should be transparent, so that the light from the ultraviolet wavelength to the infrared wavelength can penetrate through the second substrate 32.
In some embodiments, the color of the polarized light is related to its wavelength band. The polarized light may be monochromatic, for example, the polarized light is ultraviolet light; alternatively, the polarized light may be a plurality of colors, for example, the polarized light includes ultraviolet light and visible light.
The embodiment of the invention provides a display panel 3, the display panel 3 includes a first substrate 31 and a second substrate 32, the first substrate 31 includes a first alignment mark 311, and the second substrate 32 includes a second alignment mark 321. The materials of the first alignment mark 311 and the second alignment mark 321 include magneto-optical materials, and the magneto-optical materials can be visualized under the irradiation of ultraviolet light waves to infrared light waves. Meanwhile, under the action of the external magnetic field, polarized light from the ultraviolet wavelength to the infrared wavelength enters the first substrate 31 and the second substrate 32, the polarization angles of the polarized light are deflected in the first substrate 31 and the second substrate 32, so that a light receiver capable of receiving light rays with a specific polarization angle is used for receiving the polarized light emitted from the second substrate 32, and whether the orthographic projection of the first alignment mark 311 on the display surface and the orthographic projection of the second alignment mark 321 on the display surface are completely overlapped or not is detected. If the shape of the projection image formed by the polarized light received by the light receiver is the same as the shape of the first alignment mark 311, whether the orthographic projection of the first alignment mark 311 on the display surface and the orthographic projection of the second alignment mark 321 on the display surface are completely overlapped; otherwise, the position of the first substrate 31 and/or the second substrate 32 may be adjusted according to the shape of the projection image formed by the polarized light received by the light receiver, so that the orthographic projection of the first alignment mark 311 on the display surface just completely overlaps the orthographic projection of the second alignment mark 321 on the display surface, that is, the first substrate and the second substrate 32 are completely aligned.
Optionally, as shown in fig. 4, the display panel 3 further includes a light shielding structure 34 disposed on a side of the first substrate 31 away from the second substrate 32; the light shielding structure 34 is located in the peripheral region 61 of the display panel 3, and its orthographic projection on the display surface completely covers the orthographic projection of the first alignment mark 311 on the display surface.
In some embodiments, the orthographic projection of the light shielding structure 34 on the display surface completely covers the orthographic projection of the first alignment marker 311 on the display surface. Wherein, the orthographic projection of the light shielding structure 34 on the display surface is just completely overlapped with the orthographic projection of the first alignment mark 311 on the display surface; alternatively, the orthographic projection of the light shielding structure 34 on the display surface completely covers the orthographic projection of the first alignment mark 311 on the display surface, and the area of the orthographic projection of the light shielding structure 34 on the display surface is larger than the area of the orthographic projection of the first alignment mark 311 on the display surface.
In some embodiments, since the orthographic projection of the first alignment mark 311 on the display surface completely overlaps the orthographic projection of the second alignment mark 321 on the display surface in the case that the first substrate 31 and the second substrate 32 are aligned in a box, when the orthographic projection of the light shielding structure 34 on the display surface completely covers the orthographic projection of the first alignment mark 311 on the display surface, the orthographic projection of the light shielding structure 34 on the display surface also completely covers the orthographic projection of the second alignment mark 321 on the display surface.
To ensure that the first alignment mark 311 and the second alignment mark 321 are visible in the range from ultraviolet to infrared, the magneto-optical materials selected for the first alignment mark 311 and the second alignment mark 321 are generally transparent.
Thus, when the display panel 3 is applied to a display device, the problem of light leakage of the frame of the display device often occurs.
In the prior art, for example, in a liquid crystal display, the transparent first alignment mark 311 and the transparent second alignment mark 321 are usually blocked by using an adhesive layer 7 for adhering the display panel 3 and the upper polarizer 302. However, as shown in fig. 6, for process reasons, the upper polarizer 302 attached to the display panel 3 has a certain attachment tolerance in the actual mass production process, and/or a certain attachment tolerance exists between the adhesive layer 7 for adhering the display panel 3 and the upper polarizer 302, and the attachment tolerance is usually 0 to 0.3 mm. Thus, when the lcd displays, a portion of the light emitted from the backlight module 4 can pass through the first alignment mark 311 and the second alignment mark 321, thereby causing light leakage at the frame of the lcd.
Therefore, in the embodiment of the invention, the light shielding structure 34 may be disposed on a side of the first substrate 31 away from the second substrate 32, and the orthographic projection of the light shielding structure 34 on the display surface completely covers the orthographic projection of the first alignment mark 311 on the display surface, so that light can be prevented from exiting the display device through the first alignment mark 311 and the second alignment mark 321, which causes a light leakage phenomenon.
An embodiment of the present invention further provides a cartridge aligning apparatus, as shown in fig. 7, including a cartridge aligning device, a magnetic field generator, a light emitter 8, and a light receiver 9.
The pair-box device has a certain accommodating space, and the first substrate 31, the second substrate 32, the magnetic field generator, the light emitter 8, and the light receiver 9 can be placed therein to form a pair-box device.
A cassette aligning device for aligning the first substrate 31 and the second substrate 32; the peripheral region 62 of the first substrate 31 includes at least one first alignment mark 311, the peripheral region of the second substrate 32 includes second alignment marks 321 corresponding to the first alignment marks 311 one by one, the shape and size of the orthographic projection of the second alignment marks 321 on the display surface of the display panel 3 are the same as the shape and size of the orthographic projection of the first alignment marks 311 on the display surface, and the materials of the two include magneto-optical materials.
In some embodiments, the thickness of the first alignment mark 311 is the same as the thickness of the second alignment mark 311; alternatively, the thickness of the first alignment mark 311 is different from the thickness of the second alignment mark 311.
In some embodiments, the material of the first alignment mark 311 is the same as the material of the second alignment mark 321; alternatively, the material of the first alignment mark 311 is different from the material of the second alignment mark 321.
The magnetic field generator applies a magnetic field to the first substrate 31 and the second substrate 32, and the direction of the magnetic field (the direction of the magnetic field strength B in fig. 7) is parallel to the thickness direction of the first substrate 31.
Wherein, the direction of the magnetic field is a direction pointing from the first substrate 31 to the second substrate 32; alternatively, the direction of the magnetic field is a direction directed from the second substrate 32 to the first substrate 31.
A light emitter 8 that emits polarized light to the first substrate 31; the polarized light has a wavelength in the range of ultraviolet wavelengths to infrared wavelengths.
In some embodiments, the specific structure of the light emitter 8 is not limited as long as the light emitter 8 can emit polarized light in the wavelength range of ultraviolet light to infrared light.
Optionally, the light emitter 8 comprises a light emitting structure 81 and a first polarizer 82. The first polarizer 82 is attached on the light emitting surface of the light emitting structure 81, so that light emitted from the light emitting structure 81 is polarized along a first direction.
In some embodiments, the polarization direction of the polarized light emitted from the light emitter 8 and incident on the first substrate 31 is the first direction. The first direction is not limited in the embodiments of the present invention, and the first direction may be any direction.
A light receiver 9 for receiving the polarized light emitted from the second substrate 32 and forming a projection pattern based on the polarized light emitted from the second substrate 32; if the shape of the projected image is the same as the shape of the first alignment mark 311, the box alignment is completed; otherwise, the cell alignment is performed again for the first substrate 31 and the second substrate 32 according to the projected image until the shape of the projected image is the same as that of the first alignment mark 311.
Here, if the shape of the projection image is the same as the shape of the second alignment mark 321, it can be considered that the box alignment is completed.
In some embodiments, the specific structure of the light receiver 9 is not limited as long as the light receiver 9 can receive polarized light emitted from the second substrate 32 and can image a projection image based on the polarized light received by itself.
Optionally, the light receiver 9 includes a camera 91 and a second polarizer 92. The second polarizing plate is attached to the objective lens of the camera so that the light receiver 9 can receive polarized light emitted from the second substrate 32.
In some embodiments, the polarization direction of the polarized light incident from the first substrate 31 and exiting from the second substrate 32 is the second direction.
When the polarized light passes through the first alignment mark 311, the polarization angle of the polarized light is deflected for the first time; then, when the polarized light having undergone the first deflection passes through the second alignment mark 321, the polarization angle is deflected for the second time.
As shown in fig. 7, the polarization angle of the polarized light polarized in the first direction is defined as 0 °, and the polarization angle of the polarized light polarized in the second direction after being emitted from the second substrate 32 is defined as θ.
Wherein, θ is VBd1+ VBd 1.
V is the Verdet constant, which is a material-specific proportionality coefficient, and has the unit rad/(T "m). The Verdet constant has a positive and negative component, when the light propagation direction is consistent with the magnetic field direction, V takes a positive value, and at the moment, the angle theta is anticlockwise rotated along the light propagation direction; when the light propagation direction is opposite to the magnetic field direction, V takes a negative value, and the angle θ is clockwise when viewed along the light propagation direction. B represents the magnetic field strength of the magnetic field. d1 denotes the thickness of the first alignment mark 311, and d2 denotes the thickness of the second alignment mark 321.
In some embodiments, if the shape of the projected image is different from the shapes of the first alignment mark 311 and the second alignment mark 321, the orthographic projection of the first alignment mark 311 on the display surface partially overlaps or does not overlap with the orthographic projection of the second alignment mark 321 on the display surface.
When the shape of the projected image is different from the shapes of the first alignment mark 311 and the second alignment mark 321, if the projected image is not blank, the orthographic projection of the first alignment mark 311 on the display surface partially overlaps the orthographic projection of the second alignment mark 321 on the display surface; if the projected image is blank, the orthographic projection of the first alignment mark 311 on the display surface does not overlap the orthographic projection of the second alignment mark 321 on the display surface.
The embodiment of the invention provides a box aligning device which comprises box aligning equipment, a magnetic field generator, a light emitter 8 and a light receiver 9. The first substrate 31 provided with the first alignment mark 311 and the second substrate 32 provided with the second alignment mark 321 are placed in the aligning box device, an external magnetic field is provided by the magnetic field generator, the polarized light from ultraviolet wavelength to infrared wavelength emitted by the light emitter 8 enters the first substrate 31 and the second substrate 32, and the polarized light changes in polarization angle when passing through the first alignment mark 311 and the second alignment mark 321. The light receiver 9 capable of receiving light with a specific polarization angle is used to receive the polarized light emitted from the second substrate 32, so as to detect whether the orthographic projection of the first alignment mark 311 on the display surface and the orthographic projection of the second alignment mark 321 on the display surface are completely overlapped. If the shape of the projection image formed by the polarized light received by the light receiver is the same as the shape of the first alignment mark 311, whether the orthographic projection of the first alignment mark 311 on the display surface and the orthographic projection of the second alignment mark 321 on the display surface are completely overlapped; otherwise, the position of the first substrate 31 and/or the second substrate 32 may be adjusted according to the shape of the projection image formed by the polarized light received by the light receiver, so that the orthographic projection of the first alignment mark 311 on the display surface exactly and completely overlaps the orthographic projection of the second alignment mark 321 on the display surface.
The embodiment of the invention also provides a box aligning method of a display panel, which can be realized by the following steps as shown in fig. 8:
s11, the box aligning device aligns the first substrate 31 and the second substrate 32; the peripheral region 62 of the first substrate 31 includes at least one first alignment mark 311, the peripheral region 62 of the second substrate 32 includes second alignment marks 321 corresponding to the first alignment marks 311 one by one, the shape and size of the orthographic projection of the second alignment marks 321 on the display surface of the display panel 3 are the same as the shape and size of the orthographic projection of the first alignment marks 311 on the display surface, and the materials of the two include magneto-optical materials.
In some embodiments, the thickness of the first alignment mark 311 is the same as the thickness of the second alignment mark 311; alternatively, the thickness of the first alignment mark 311 is different from the thickness of the second alignment mark 311.
In some embodiments, the material of the first alignment mark 311 is the same as the material of the second alignment mark 321; alternatively, the material of the first alignment mark 311 is different from the material of the second alignment mark 321.
S12, the magnetic field generator applies a magnetic field to the first substrate 31 and the second substrate 32, the direction of the magnetic field being parallel to the thickness direction of the first substrate 31.
Wherein, the direction of the magnetic field is a direction pointing from the first substrate 31 to the second substrate 32; alternatively, the direction of the magnetic field is a direction directed from the second substrate 32 to the first substrate 31.
S13, the light emitter 8 emits polarized light to the first substrate 31; the polarized light has a wavelength in the range of ultraviolet wavelengths to infrared wavelengths.
In some embodiments, the specific structure of the light emitter 8 is not limited as long as the light emitter 8 can emit polarized light in the wavelength range of ultraviolet light to infrared light.
Optionally, the light emitter 8 comprises a light emitting structure 81 and a first polarizer 82. The first polarizer 82 is attached on the light emitting surface of the light emitting structure 81, so that light emitted from the light emitting structure 81 is polarized along a first direction.
In some embodiments, the polarization direction of the polarized light emitted from the light emitter 8 and incident on the first substrate 31 is the first direction. The first direction is not limited in the embodiments of the present invention, and the first direction may be any direction.
S14, the light receiver 9 receives the polarized light emitted from the second substrate 32, and forms a projection pattern according to the polarized light emitted from the second substrate 32; if the shape of the projected image is the same as the shape of the first alignment mark 311, the box alignment is completed; otherwise, the cell alignment is performed again for the first substrate 31 and the second substrate 32 according to the projected image until the shape of the projected image is the same as that of the first alignment mark 311.
Here, if the shape of the projection image is the same as the shape of the second alignment mark 321, it can be considered that the box alignment is completed.
In some embodiments, the specific structure of the light receiver 9 is not limited as long as the light receiver 9 can receive polarized light emitted from the second substrate 32 and can image a projection image based on the polarized light received by itself.
Optionally, the light receiver 9 includes a camera 91 and a second polarizer 92. The second polarizing plate is attached to the objective lens of the camera so that the light receiver 9 can receive polarized light emitted from the second substrate 32.
In some embodiments, the polarization direction of the polarized light incident from the first substrate 31 and exiting from the second substrate 32 is the second direction.
When the polarized light passes through the first alignment mark 311, the polarization angle of the polarized light is deflected for the first time; then, when the polarized light having undergone the first deflection passes through the second alignment mark 321, the polarization angle is deflected for the second time.
As shown in fig. 7, the polarization angle of the polarized light polarized in the first direction is defined as 0 °, and the polarization angle of the polarized light polarized in the second direction after being emitted from the second substrate 32 is defined as θ.
Wherein, θ is VBd1+ VBd 1.
V is the Verdet constant, which is a material-specific proportionality coefficient, and has the unit rad/(T "m). The Verdet constant has a positive and negative component, when the light propagation direction is consistent with the magnetic field direction, V takes a positive value, and at the moment, the angle theta is anticlockwise rotated along the light propagation direction; when the light propagation direction is opposite to the magnetic field direction, V takes a negative value, and the angle θ is clockwise when viewed along the light propagation direction. B represents the magnetic field strength of the magnetic field. d1 denotes the thickness of the first alignment mark 311, and d2 denotes the thickness of the second alignment mark 321.
In some embodiments, if the shape of the projected image is different from the shapes of the first alignment mark 311 and the second alignment mark 321, the orthographic projection of the first alignment mark 311 on the display surface partially overlaps or does not overlap with the orthographic projection of the second alignment mark 321 on the display surface.
When the shape of the projected image is different from the shapes of the first alignment mark 311 and the second alignment mark 321, if the projected image is not blank, the orthographic projection of the first alignment mark 311 on the display surface partially overlaps the orthographic projection of the second alignment mark 321 on the display surface; if the projected image is blank, the orthographic projection of the first alignment mark 311 on the display surface does not overlap the orthographic projection of the second alignment mark 321 on the display surface.
The embodiment of the invention provides a box aligning method of a display panel, which has the same beneficial effects as the box aligning device and is not repeated herein.
On the basis, after the box alignment of the display panel 3 is completed, the box alignment method of the display panel 3 further includes: as shown in fig. 4, a light shielding structure 34 is formed on a side of the first substrate 31 facing away from the second substrate 32. The light shielding structure 34 is located in the peripheral region 62 of the display panel 3, and an orthogonal projection of the light shielding structure on the display surface completely covers an orthogonal projection of the first alignment mark 311 on the display surface.
Here, since the first substrate 31 and the second substrate 32 are first aligned and then the light shielding structure 34 is formed on the display panel 3, the light shielding structure 34 does not affect the propagation of the polarized light emitted from the light emitter 8 to the first substrate 31 and the propagation of the polarized light irradiated from the second substrate 32 to the light receiver 9.
In some embodiments, the orthographic projection of the light shielding structure 34 on the display surface completely covers the orthographic projection of the first alignment marker 311 on the display surface. Wherein, the orthographic projection of the light shielding structure 34 on the display surface is just completely overlapped with the orthographic projection of the first alignment mark 311 on the display surface; alternatively, the orthographic projection of the light shielding structure 34 on the display surface completely covers the orthographic projection of the first alignment mark 311 on the display surface, and the area of the orthographic projection of the light shielding structure 34 on the display surface is larger than the area of the orthographic projection of the first alignment mark 311 on the display surface.
In some embodiments, since the orthographic projection of the first alignment mark 311 on the display surface completely overlaps the orthographic projection of the second alignment mark 321 on the display surface in the case that the first substrate 31 and the second substrate 32 are aligned in a box, when the orthographic projection of the light shielding structure 34 on the display surface completely covers the orthographic projection of the first alignment mark 311 on the display surface, the orthographic projection of the light shielding structure 34 on the display surface also completely covers the orthographic projection of the second alignment mark 321 on the display surface.
To ensure that the first alignment mark 311 and the second alignment mark 321 are visible in the range from ultraviolet to infrared, the magneto-optical materials selected for the first alignment mark 311 and the second alignment mark 321 are generally transparent.
Thus, when the display panel 3 is applied to a display device, the problem of light leakage of the frame of the display device often occurs.
In the prior art, for example, in a liquid crystal display, the transparent first alignment mark 311 and the transparent second alignment mark 321 are usually blocked by using an adhesive layer 7 for adhering the display panel 3 and the upper polarizer 302. However, as shown in fig. 6, for process reasons, the upper polarizer 302 attached to the display panel 3 has a certain attachment tolerance in the actual mass production process, and/or a certain attachment tolerance exists between the adhesive layer 7 for adhering the display panel 3 and the upper polarizer 302, and the attachment tolerance is usually 0 to 0.3 mm. Thus, when the lcd displays, a portion of the light emitted from the backlight module 4 can pass through the first alignment mark 311 and the second alignment mark 321, thereby causing light leakage at the frame of the lcd.
Therefore, in the embodiment of the invention, the light shielding structure 34 may be disposed on a side of the first substrate 31 away from the second substrate 32, and the orthographic projection of the light shielding structure 34 on the display surface completely covers the orthographic projection of the first alignment mark 311 on the display surface, so that light can be prevented from exiting the display device through the first alignment mark 311 and the second alignment mark 321, which causes a light leakage phenomenon.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A display panel is characterized by comprising a first substrate and a second substrate;
the peripheral area of the first substrate comprises at least one first alignment mark, and the peripheral area of the second substrate comprises second alignment marks corresponding to the first alignment marks in a one-to-one mode; the orthographic projection of the second alignment mark on the display surface of the display panel is completely overlapped with the orthographic projection of the first alignment mark on the display surface; the area of the first substrate, which is provided with the first alignment mark, is transparent, and the area of the second substrate, which is provided with the second alignment mark, is transparent;
wherein the materials of the first alignment mark and the second alignment mark both comprise magneto-optical materials;
the magneto-optical material is an optical information functional material with magneto-optical effect in the range from ultraviolet wavelength to infrared wavelength.
2. The display panel according to claim 1, further comprising a light shielding structure disposed on a side of the first substrate facing away from the second substrate;
the light shielding structure is located in the peripheral area of the display panel, and the orthographic projection of the light shielding structure on the display surface completely covers the orthographic projection of the first alignment mark on the display surface.
3. The display panel of claim 1, wherein the magneto-optical material comprises one of a terbium gallium garnet ceramic, a terbium aluminum garnet ceramic, and a sesquioxide ceramic.
4. A display device characterized by comprising the display panel according to any one of claims 1 to 3.
5. The box aligning device is characterized by comprising a box aligning device, a magnetic field generator, a light emitter and a light receiver;
the box aligning device is used for aligning the first substrate and the second substrate; the peripheral area of the first substrate comprises at least one first alignment mark, the peripheral area of the second substrate comprises second alignment marks corresponding to the first alignment marks in a one-to-one mode, the shape and the size of the orthographic projection of the second alignment marks on the display surface of the display panel are the same as those of the orthographic projection of the first alignment marks on the display surface, and the materials of the first alignment marks and the second alignment marks comprise magneto-optical materials;
the magnetic field generator applies a magnetic field to the first substrate and the second substrate, and the direction of the magnetic field is parallel to the thickness direction of the first substrate;
the light emitter emits polarized light to the first substrate; the wavelength of the polarized light is in the range from the wavelength of ultraviolet light to the wavelength of infrared light;
the light receiver receives the polarized light emitted from the second substrate and forms a projection pattern according to the polarized light emitted from the second substrate; if the shape of the projection image is the same as that of the first alignment mark, box alignment is completed; and if not, performing box alignment on the first substrate and the second substrate again according to the projected image until the shape of the projected image is the same as that of the first alignment mark.
6. The box-aligning device of claim 5, wherein the light emitter comprises a light emitting structure and a first polarizer;
the first polaroid is attached to the light-emitting surface of the light-emitting structure.
7. The box aligning device of claim 5, wherein the light receiver comprises a camera and a second polarizer;
the second polaroid is attached to the objective lens of the camera.
8. A method for aligning a display panel, comprising:
the box aligning device aligns the first substrate and the second substrate; the peripheral area of the first substrate comprises at least one first alignment mark, the peripheral area of the second substrate comprises second alignment marks corresponding to the first alignment marks in a one-to-one mode, the shape and the size of the orthographic projection of the second alignment marks on the display surface of the display panel are the same as those of the orthographic projection of the first alignment marks on the display surface, and the materials of the first alignment marks and the second alignment marks comprise magneto-optical materials;
a magnetic field generator applying a magnetic field to the first substrate and the second substrate, the direction of the magnetic field being parallel to a thickness direction of the first substrate;
the light emitter emits polarized light to the first substrate; the wavelength of the polarized light is in the range from the wavelength of ultraviolet light to the wavelength of infrared light;
the light receiver receives the polarized light emitted from the second substrate and forms a projection pattern according to the polarized light emitted from the second substrate; if the shape of the projection image is the same as that of the first alignment mark, box alignment is completed; and if not, performing box alignment on the first substrate and the second substrate again according to the projected image until the shape of the projected image is the same as that of the first alignment mark.
9. The cell pairing method of a display panel according to claim 8, wherein the light emitter includes a light emitting structure and a first polarizing plate;
the first polaroid is attached to the light-emitting surface of the light-emitting structure.
10. The pair-cell method of a display panel according to claim 8, wherein the light receiver includes a camera and a second polarizing plate;
the second polaroid is attached to the objective lens of the camera.
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| CN214335688U (en) * | 2020-11-09 | 2021-10-01 | 京东方科技集团股份有限公司 | Display module and display device |
| CN114093265B (en) * | 2021-11-25 | 2024-03-08 | 武汉华星光电半导体显示技术有限公司 | Display device |
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| US6583847B2 (en) * | 2001-06-18 | 2003-06-24 | International Business Machines Corporation | Self alignment of substrates by magnetic alignment |
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| CN202563208U (en) * | 2012-01-13 | 2012-11-28 | 京东方科技集团股份有限公司 | Liquid crystal display device |
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