WO2014059756A1 - 液晶显示装置、专用眼镜及显示系统 - Google Patents

液晶显示装置、专用眼镜及显示系统 Download PDF

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Publication number
WO2014059756A1
WO2014059756A1 PCT/CN2013/072884 CN2013072884W WO2014059756A1 WO 2014059756 A1 WO2014059756 A1 WO 2014059756A1 CN 2013072884 W CN2013072884 W CN 2013072884W WO 2014059756 A1 WO2014059756 A1 WO 2014059756A1
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WIPO (PCT)
Prior art keywords
liquid crystal
display device
crystal display
quarter
polarizer
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Application number
PCT/CN2013/072884
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English (en)
French (fr)
Inventor
李文波
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京东方科技集团股份有限公司
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Publication of WO2014059756A1 publication Critical patent/WO2014059756A1/zh

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Classifications

    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13363Birefringent elements, e.g. for optical compensation
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528Polarisers
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/30Polarising elements
    • G02B5/3025Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • GPHYSICS
    • G02OPTICS
    • G02CSPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00Optical parts
    • G02C7/12Polarisers
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13363Birefringent elements, e.g. for optical compensation
    • G02F1/133638Waveplates, i.e. plates with a retardation value of lambda/n
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F2413/00Indexing scheme related to G02F1/13363, i.e. to birefringent elements, e.g. for optical compensation, characterised by the number, position, orientation or value of the compensation plates
    • G02F2413/01Number of plates being 1

Definitions

  • Liquid crystal display device special glasses and display system
  • Embodiments of the present invention relate to a liquid crystal display device, special glasses, and a display system. Background technique
  • the liquid crystal display device has become the most mainstream flat display device due to its thin and light profile, low power consumption, and versatility.
  • the normal display area can be limited to the narrow front viewing angle area, so that other people on the left and right sides can not see or see the displayed information, thereby playing a certain role.
  • the role of privacy protection because the person who intentionally or unintentionally peeks into the private computer information may also be behind the user or, for example, by a stealth camera, the information displayed on the liquid crystal display may be observed more clearly. Summary of the invention
  • Embodiments of the present invention provide a liquid crystal display device having high display confidentiality.
  • Embodiments of the present invention also provide a dedicated eyeglass for viewing the above liquid crystal display device.
  • Embodiments of the present invention also provide a display system including the above liquid crystal display device and the above-described dedicated glasses.
  • An aspect of the invention provides a liquid crystal display device including a liquid crystal panel including a thin film transistor (TFT) array substrate, a counter substrate, and a liquid crystal layer between the TFT array substrate and the opposite substrate,
  • TFT thin film transistor
  • the TFT array substrate is disposed opposite to the opposite substrate, and the liquid crystal display device is provided with only a first polarizer on the TFT array substrate.
  • the opposite substrate is provided with a first quarter-wavelength plate, and between the fast axis of the first quarter-wavelength plate and the polarization axis of the first polarizer And forming a first preset angle, where the first preset angle is greater than or equal to 0° and less than or equal to 90. .
  • the first quarter-wavelength plate is located on a side of the opposite substrate facing the liquid crystal layer.
  • the first quarter-wave plate is located at the opposite base The plate faces away from one side of the liquid crystal layer.
  • the first predetermined angle is an acute angle.
  • the preset angle is 45°.
  • the liquid crystal display device may further include a backlight located on a side of the first polarizer facing away from the liquid crystal layer.
  • the first polarizer is provided with a reflection layer of a predetermined pattern toward one side of the backlight.
  • a reflection portion is provided on a side of the first polarizer facing away from the liquid crystal layer.
  • the reflection portion is a reflection layer on a side of the first polarizer facing away from the liquid crystal layer.
  • the reflection portion is a reflection film attached to one surface of the first polarizer facing away from the liquid crystal layer.
  • a touch module is disposed on a side of the opposite substrate facing away from the liquid crystal layer.
  • the liquid crystal panel includes an in-cell touch module.
  • Another aspect of the invention also provides a lens comprising at least one lens, the at least one lens comprising a second polarizer.
  • the glasses may further include a second quarter-wavelength plate, wherein the second quarter-wavelength plate and the second polarizer are sequentially arranged by the light-incident surface of the glasses pointing to the light-emitting surface, A second predetermined angle is between the fast axis of the second quarter wave plate and the polarization axis of the second polarizer, and the second predetermined angle is greater than or equal to zero. Less than or equal to 90. .
  • Still another aspect of the present invention provides a display system including the above liquid crystal display device and the above-described glasses.
  • the polarization axes of the first polarizer and the second polarizer are perpendicular to each other.
  • the first preset angle is zero. Or 90.
  • the fast axes of the first and second quarter-wave plates are parallel or perpendicular to each other, and the polarization axes of the first polarizer and the second polarizer are perpendicular to each other; when the first preset angle is At 45°, the second preset angle is 45°; When the first preset angle is the remaining angle a, the fast axes of the first and second quarter-wave plates are parallel to each other and the second preset angle is 90.
  • -a, or the fast axes of the first and second quarter-wavelength plates are perpendicular to each other and the second predetermined angle is equal to the first predetermined angle.
  • FIG. 1 is a schematic structural diagram of a liquid crystal display device according to Embodiment 1 of the present invention.
  • FIG. 2 is a schematic structural view of a total transmission type liquid crystal display device according to Embodiment 1 of the present invention
  • FIG. 3 is a schematic structural view of a total reflection type liquid crystal display device according to Embodiment 1 of the present invention
  • Schematic diagram of the special glasses
  • FIG. 5 is a schematic view showing an angle formed by a polarization direction of a polarizer and a fast axis direction of a quarter-wavelength plate in a dedicated eyepiece according to Embodiment 2 of the present invention
  • FIG. 6 is a schematic diagram of a principle of a display system according to Embodiment 3 of the present invention.
  • FIG. 7 is a schematic structural diagram of a liquid crystal display device according to Embodiment 4 of the present invention
  • FIG. 8 is a schematic structural diagram of a liquid crystal display device according to Embodiment 7 of the present invention.
  • Connected” or “connected” and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
  • “Upper”, “Bottom”, “Left”, “Right”, etc. are only used to indicate the relative positional relationship. When the absolute position of the object to be described is changed, the relative positional relationship may also change accordingly.
  • the characteristics of the quarter-wave plate are as follows.
  • the linearly polarized light passes through the quarter-wavelength plate, it is converted into circularly polarized light; when the polarization direction of the incident linearly polarized light is at other angles with the fast axis of the quarter-wavelength plate, The linearly polarized light is converted into elliptically polarized light by a quarter-wavelength slice; when the polarization direction of the incident linearly polarized light is perpendicular to the fast-axis direction of the quarter-wavelength plate (ie, the angle between the two At 90°, the polarization direction of the incident linearly polarized light coincides with the slow axis direction of the quarter-wave plate, and the linearly polarized light is still linearly polarized after passing through the quarter-wave plate. .
  • the incident circularly polarized light passes through the quarter-wave plate, it becomes linearly polarized light, and the direction of vibration of the linearly polarized light is 45 with the fast-axis direction of the quarter-wave plate.
  • the incident elliptically polarized light passes through the quarter-wave plate, it will become linearly polarized light, and the angle between the vibration direction of the linearly polarized light and the fast-axis direction of the quarter-wave plate is an acute angle and is not equal to 45 degree.
  • Embodiments of the present invention improve display confidentiality of a liquid crystal display device.
  • this embodiment provides a liquid crystal display device 100 including a liquid crystal panel.
  • the liquid crystal panel includes a thin film transistor (TFT) array substrate 10, a color filter substrate 20, and a liquid crystal layer 2 between the TFT array substrate 10 and the color filter substrate 20.
  • a lower polarizer 1 is disposed on a side of the TFT array substrate 10 facing away from the liquid crystal layer 2; a quarter-wavelength plate 3 and a quarter-wavelength plate 3 are disposed on a side of the liquid crystal layer 2 facing away from the TFT array substrate 10.
  • the fast axis forms a first predetermined angle with the polarization axis of the lower polarizer 1 (ie, the transmission axis), and the first predetermined angle is greater than or equal to 0° and less than or equal to 90. , that is, the first preset angle may be 0. To 90. Any angle.
  • the color filter substrate 20 is an example of a counter substrate disposed opposite to the array substrate 10 in the liquid crystal panel, and the opposite substrate is disposed opposite to the array substrate to form a liquid crystal cell, and the surrounding frame is sealed by a frame. Glue (not shown) is sealed.
  • the opposite substrate may no longer include a color film structure.
  • the color filter substrate 20 is located between the liquid crystal layer 20 and the quarter-wavelength plate 3, but the color filter substrate 20 may be disposed at other positions as described below.
  • the color filter substrate 20 does not include another polarizer. That is, only one polarizer is disposed on the array substrate 10 in the liquid crystal display device 100 of the present embodiment.
  • the present embodiment introduces a dedicated display device for the above liquid crystal display device, which can be prepared, for example, in the form of glasses.
  • the display panel has only the lower polarizer 1 , and the incident light is polarized into linearly polarized light through the lower polarizer 1 , and the linearly polarized light is transmitted through the liquid crystal layer 2 and then emitted;
  • the polarization state of the light emitted from the liquid crystal layer 2 may be constant or shifted with respect to the linearly polarized light incident on the liquid crystal layer 2.
  • the display panel does not have an upper polarizer with respect to a conventional liquid crystal display panel, and light that is transmitted through the liquid crystal layer 2 to be emitted outside the display panel does not pass through any polarizer before leaving the display panel.
  • the area C and the area D shown are respectively in a bright state and a dark state.
  • the fast axis of the quarter-wave plate 3 and the polarization axis of the lower polarizer 1 have a first predetermined angle.
  • the first preset angle is 90. Or 0°
  • the linearly polarized light transmitted through the lower polarizer 1 passes through the liquid crystal layer 2, its polarization direction is rotated by 90. Or 0.
  • the angle between the obtained linearly polarized light and the fast axis of the quarter-wavelength plate 3 is still 0° or 90. Therefore, the light transmitted through the quarter-wavelength plate 3 is still linearly polarized.
  • the first preset angle is 45.
  • the linearly polarized light transmitted through the lower polarizer 1 passes through the liquid crystal layer 2, its polarization direction is rotated by 90. Or 0.
  • the angle between the obtained linearly polarized light and the fast axis of the quarter-wavelength plate 3 is still 45°, and therefore, the light transmitted through the quarter-wavelength plate 3 is circularly polarized light.
  • the linearly polarized light transmitted through the lower polarizer 1 is rotated by 90 when the liquid crystal layer 2 is transmitted. Or 0.
  • the angle between the obtained linearly polarized light and the fast axis of the quarter-wavelength piece 3 is an acute angle (equal to the above-mentioned preset angle or a complementary angle with the above-mentioned preset angle), and is not 45. Therefore, the light transmitted through the quarter-wavelength plate 3 is elliptically polarized light.
  • the information contained therein cannot be seen in the eye state, people cannot directly recognize the positive from the liquid crystal display device 100 in the eye state.
  • the light emitted from the display panel the light emitted from the display panel of the liquid crystal display device 100 can be displayed only by the dedicated display device, thereby improving the confidentiality of the liquid crystal display device 100.
  • the arrangement position and formation manner of the quarter-wavelength plate 3 in the above embodiment can be variously selected, for example, as described below.
  • the quarter-wavelength plate 3 is located on one side of the color filter substrate 10 of the liquid crystal display device 100 facing the liquid crystal layer 2.
  • the quarter-wavelength plate 3 described above may be formed by curing liquid crystal molecules.
  • the quarter-wavelength plate 3 is located on a side of the color filter substrate 10 facing away from the liquid crystal layer 2.
  • the first predetermined angle between the quarter-wavelength plate 3 and the polarizing axis of the lower polarizer 1 mentioned in the above technical solution is an acute angle, that is, not 90° or 0°.
  • the first predetermined angle between the fast axis of the quarter wave plate 3 and the polarization axis of the lower polarizer 1 is 45°.
  • the first predetermined angle between the fast axis of the quarter wave plate 3 and the polarization axis of the lower polarizer 1 is 45.
  • the quarter-wavelength plate 3 converts the linearly polarized light emitted from the display panel into circularly polarized light and emits it again.
  • the fast axis of the second quarter-wave plate is 45 with the polarization axis of the second polarizer.
  • the second quarter-wavelength plate converts the circularly polarized light emitted from the display panel into linearly polarized light at any angle, and the linearly polarized light is used to realize a normal display of a dark state or a bright state through the second polarizer. Therefore, this example increases the comfort that the user views.
  • the quarter wave plate 3 when the first preset angle between the fast axis of the quarter wave plate 3 and the polarization axis of the lower polarizer 1 is other acute angles, the quarter wave plate 3 can emit the display panel.
  • the linearly polarized light is converted into elliptically polarized light.
  • the quarter-wavelength plate of the dedicated display device can convert the elliptically polarized light into linearly polarized light, and then can be normally displayed by the polarizer in the dedicated display device (as described below);
  • the angle between the quarter-wavelength plate and the optical axis of the elliptically polarized light emitted by the liquid crystal display device cannot be normally displayed at other angles, thereby further improving the confidentiality of the liquid crystal display device.
  • the type of the liquid crystal display device may be selected from a plurality of types.
  • the liquid crystal display device may be of a full transmission type.
  • the liquid crystal display The device may further include a backlight 5 located on the side of the lower polarizer 1 facing away from the liquid crystal layer 2.
  • the light source in the liquid crystal display device is from the backlight 5, and the light emitted is natural light or the like.
  • the backlight 5 can, for example, select a backlight that is well known in the art. This example is shown in Fig. 2. For the sake of the cartridge, the array substrate and the opposite substrate (e.g., color film substrate) are not shown.
  • the liquid crystal display device may be a transflective type.
  • a side of the lower polarizer 1 facing the backlight 5 is provided with a reflection layer of a predetermined pattern (not shown in the reflection layer).
  • the liquid crystal display device may be of a total reflection type.
  • the side of the lower polarizer 1 facing away from the liquid crystal layer 2 is provided with a reflecting portion 6.
  • This example is shown in Fig. 3.
  • the array substrate and the opposite substrate for example, a color filter substrate
  • the natural light of the outside is still natural light after passing through the quarter-wavelength plate 3 and the liquid crystal layer 2, and is converted into linearly polarized light in the direction of the polarization axis of the lower polarizer 1 after passing through the lower polarizer 1 and being reflected by the reflection portion 6, the region
  • the linearly polarized light in C passes through the liquid crystal layer 2, and is converted into linearly polarized light perpendicular to the original polarization direction, and the linearly polarized light in the region D passes through the liquid crystal layer 2, and the polarization direction does not change.
  • two-part linearly polarized light, after passing through the quarter-wavelength plate 3 is converted into circularly polarized light of opposite rotation direction, or elliptically polarized light, which also improves confidentiality.
  • the reflecting portion 6 may be a reflecting layer located on the surface of the lower polarizer 1 facing away from the liquid crystal layer.
  • the reflection portion 6 may be a reflection film attached to the lower surface of the liquid crystal layer 2 attached to the lower polarizer 1.
  • an embodiment of the present invention further provides a dedicated display device, such as special glasses 4, for use in any of the liquid crystal display devices provided in the above-described first embodiment and examples thereof.
  • the special glasses can be used alone for the user, or can be mounted on a helmet or the like for use.
  • the special lens 4 includes at least one lens 41, and generally includes two lenses 41 each having a second quarter-wave plate 412 and a second polarizer 411 which are sequentially arranged with their light-incident faces directed toward the light-emitting surface.
  • a second predetermined angle ⁇ between the fast axis b of the quarter-wave plate 412 and the polarization axis a of the polarizer 411, and the second predetermined angle ⁇ is four-quarters of the liquid crystal display device
  • the first predetermined angle formed between the fast axis of the one wavelength plate 3 and the polarizing axis of the lower polarizer 1 is equal, or the sum of the first predetermined angle is 90. (ie, the two are complementary to each other).
  • the embodiment provides a display system, and the display system includes the first embodiment.
  • the display system includes the first embodiment.
  • the liquid crystal display device 100 and the dedicated eyepiece mirror 4 are used in cooperation with each other to realize a confidential display.
  • the second preset angle ⁇ is 0° or 90.
  • the fast axes of the quarter-wavelength plate 3 and the second quarter-wavelength plate 412 are parallel or perpendicular to each other, when the polarization axis of the second polarizer 411 and the polarization axis of the lower polarizer 1 are perpendicular to each other, The user can normally display the screen of the liquid crystal display device through the dedicated glasses.
  • the second predetermined angle ⁇ between the fast axis of the second quarter wave plate 412 and the polarization axis of the second polarizer 411 in the special glasses 4 is 45°, and the second in the dedicated eyepiece 4
  • the angle between the polarization axis of the polarizer 411 and the polarization axis of the lower polarizer 1 in the liquid crystal display device 100 is an arbitrary value, the screen of the liquid crystal display device can be normally displayed by the dedicated glasses.
  • the first predetermined angle is other acute angles a
  • the second predetermined angle between the fast axis of the second quarter wave plate 412 and the polarization axis of the second polarizer 411 in the special glasses 4 Equal to the first predetermined angle, then two quarter-wavelength slices (ie, the quarter-wavelength slice 3 in the liquid crystal display device 100 and the second quarter-wavelength slice 412 in the dedicated glasses)
  • the fast axes are perpendicular to each other (correspondingly, the polarization directions of the second polarizer 412 and the lower polarizer 1 are perpendicular to each other)
  • the fast axes are perpendicular to each other (correspondingly, the polarization directions of the second polarizer 412 and the lower polarizer 1 are perpendicular to each other)
  • the fast axes are perpendicular to each other (correspondingly, the polarization directions of the second polarizer 412 and the lower polarizer 1 are perpendicular to each other)
  • the fast axes are per
  • the second preset angle is 90.
  • -a when the quarter-wavelength plate 3 in the liquid crystal display device 100 and the fast axis of the second quarter-wavelength plate 412 in the special glasses 4 are parallel (correspondingly, the second polarizer 412 and the lower polarized light)
  • the angle between the polarization directions of the film 1 is 90° - 2a ), that is, the roles of the two quarter-wave plates are superimposed on each other, and the total effect of the two can be regarded as a half-wave plate.
  • the angle between the ray-polarized light and the fast axis of the half-wavelength plate is a (ie, the first predetermined angle), and the emitted linearly polarized light is rotated 2a around the fast axis direction, thereby Eyepiece mirror 4
  • the image in the liquid crystal display device 100 can be normally displayed.
  • the image of the above liquid crystal display device can be normally displayed using the dedicated glasses provided by the display system of the present embodiment. That is, only the person using the above-mentioned dedicated glasses can see the image displayed on the liquid crystal display device, while others cannot see the image displayed on the liquid crystal display device, so the security display system has good display confidentiality.
  • the present embodiment provides a liquid crystal display device 200 including a liquid crystal panel.
  • the liquid crystal display device 200 differs from the liquid crystal display device 100 of the first embodiment in that the quarter-wavelength plate 3 is not included.
  • the liquid crystal panel includes a thin film transistor (TFT) array substrate 10, an opposite substrate such as the color filter substrate 20, and a liquid crystal layer 2 between the TFT array substrate 10 and the color filter substrate 20.
  • TFT thin film transistor
  • the lower polarizer 1 is provided only on the side of the TFT array substrate 10 facing away from the liquid crystal layer 2. For the sake of convenience, the rest of the liquid crystal display device 200 will not be described in detail.
  • a dedicated sight glass 40 for the above liquid crystal display device 200 is incorporated, which includes a lens having a second polarizer.
  • the region C and the region D are respectively in a bright state and a dark state, and have a lower polarization only on a side of the TFT array substrate of the liquid crystal panel facing away from the liquid crystal layer 2.
  • the light is polarized to linearly polarized light by the lower polarizer 1, and the linearly polarized light is transmitted through the liquid crystal layer 2 and then emitted. Since another polarizer that is not matched to the lower polarizer is filtered, the information it contains cannot be recognized in the eye state.
  • the present embodiment provides a dedicated display device, such as special glasses 40, for the liquid crystal display device of the above-described fourth embodiment.
  • the special glasses 40 can be used alone for the user to wear, or can be mounted on a helmet or the like for use.
  • the special eyepiece mirror 40 differs from the dedicated eyepiece mirror 4 of the second embodiment in that each lens includes only the second polarizer, and does not include the second quarter-wave plate.
  • the present embodiment provides a display system including the liquid crystal display device of the fourth embodiment and the dedicated eyepiece mirror provided in the fifth embodiment.
  • the polarization axes of the lower polarizer 1 of the liquid crystal display device 200 and the polarization axes of the second polarizers of the dedicated glasses are perpendicular to each other.
  • the light emitted from the liquid crystal display device 200 is linearly polarized light whose polarization direction may be unpolarized or polarized 90 due to the action of the liquid crystal layer.
  • the linearly polarized light emitted from the liquid crystal display device 200 can be transmitted or blocked after being incident on the second polarizer on the dedicated glasses, thereby realizing display in a bright state or a dark state.
  • the special eyepiece provided by the embodiment can display the image of the liquid crystal display device normally, while other people cannot see the image displayed on the liquid crystal display device, so the security display system has good display security. Sex.
  • the liquid crystal display device provided in the first embodiment and the fourth embodiment of the present invention may further have a touch function.
  • a touch module is disposed on a side of the opposite substrate (for example, a color filter substrate) facing away from the liquid crystal layer.
  • the touch module can adopt various types of external touch modules, such as a capacitive type, a resistive type or an infrared type touch module. As shown in Fig. 8, a touch module 50 is disposed on the outer side of the counter substrate 10 of the liquid crystal display device of the fourth embodiment.
  • the hierarchical structure of the touch module can be prepared first, and then the prepared touch module is directly attached to the side of the opposite substrate facing away from the liquid crystal layer.
  • no polarizer is disposed on the side of the opposite substrate facing away from the liquid crystal layer, which reduces the difficulty of bonding the touch control module.
  • the hierarchical structure of the touch module can be prepared directly on the side of the color filter substrate of the liquid crystal panel facing away from the liquid crystal layer, which is not limited herein.
  • an in-cell touch technology may be adopted, that is, the liquid crystal panel includes an in-cell touch module, that is, each hierarchical structure constituting the touch structure is directly prepared inside the liquid crystal panel (for example, , the array structure of the array substrate).
  • the specific implementation of the embedded touch screen can adopt the existing solutions in the art, and therefore will not be described in detail herein.
  • the tempered glass film is generally attached thereto.
  • the liquid crystal display device provided by the embodiment of the present invention, since the opposite substrate is disposed away from the opposite substrate
  • the polarizer on one side of the liquid crystal layer when the in-cell touch panel is used as the liquid crystal panel, the tempered glass material can be directly used to fabricate the substrate substrate of the opposite substrate in the liquid crystal panel, and the existing tempered glass film can be omitted.
  • the layer can optimize the preparation process of the entire liquid crystal display device.
  • the display system provided by the embodiment of the present invention can further have a touch function by adding an external or in-cell touch module.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Polarising Elements (AREA)
  • Liquid Crystal (AREA)

Abstract

一种液晶显示装置,包括液晶面板,该液晶面板包括薄膜晶体管(TFT)阵列基板(10)、对置基板(20)以及位于TFT阵列基板(10)和对置基板(20)之间的液晶层(2),TFT阵列基板(10)与对置基板(20)相对设置,液晶显示装置仅在TFT阵列基板(10)上设置有第一偏光片(1)。对置基板(20)上还可设置有第一四分之一波长片(3)。还提供了一种用于该液晶显示装置的专用眼镜,以及一种包括该液晶显示装置和专用眼镜的显示系统。

Description

液晶显示装置、 专用眼镜及显示系统 技术领域
本发明的实施例涉及一种液晶显示装置、 专用眼镜及显示系统。 背景技术
液晶显示装置由于轻薄外形、 低功耗、 多功能而成为最主流的平面显示 装置。 利用液晶显示装置的窄视角的特点, 可以将正常显示区域仅局限于较 窄的正面视角区域, 从而在侧面左右两边的其他人无法看清或看到显示的信 息, 由此可起到一定的保护隐私的作用。 但是, 因为有意或无意偷窥隐私电 脑信息的人, 也可能在使用者的后方或例如通过隐形摄像头拍摄, 可能较清 晰的观察到液晶显示器上显示的信息。 发明内容
本发明的实施例提供了一种液晶显示装置, 该液晶显示装置具有高的显 示保密性。
本发明的实施例还提供了一种用于观看上述液晶显示装置的专用眼镜。 本发明的实施例还提供了一种包括上述液晶显示装置以及上述专用眼镜 的显示系统。
本发明的一个方面提供了一种液晶显示装置, 包括液晶面板, 所述液晶 面板包括薄膜晶体管(TFT )阵列基板、 对置基板以及位于所述 TFT阵列基 板和对置基板之间的液晶层, 其中, 所述 TFT阵列基板与所述对置基板相对 设置, 所述液晶显示装置仅在 TFT阵列基板上设置有第一偏光片。
对于该液晶显示装置, 例如, 所述对置基板上设置有第一四分之一波长 片, 所述第一四分之一波长片的快轴与所述第一偏光片的偏光轴之间成第一 预设角, 所述第一预设角大于等于 0° 小于等于 90。 。
对于该液晶显示装置, 例如, 所述第一四分之一波长片位于所述对置基 板朝向所述液晶层的一面。
对于该液晶显示装置, 例如, 所述第一四分之一波长片位于所述对置基 板背离所述液晶层的一面。
对于该液晶显示装置, 例如, 所述第一预设角为锐角。 例如, 所述预设 角为 45° 。
例如, 该液晶显示装置还可以包括位于所述第一偏光片背离所述液晶层 一侧的背光源。
对于该液晶显示装置, 例如, 所述第一偏光片朝向所述背光源的一面设 置有预定图形的反射层。
对于该液晶显示装置, 例如, 所述第一偏光片背离所述液晶层的一侧设 置有反射部。
对于该液晶显示装置, 例如, 所述反射部为位于所述第一偏光片背离所 述液晶层一面的反射层。
对于该液晶显示装置, 例如, 所述反射部为贴附于所述第一偏光片背离 所述液晶层一面的反射膜。
对于该液晶显示装置, 例如, 在所述对置基板背离所述液晶层的一侧设 置有触控模组。
对于该液晶显示装置, 例如, 所述液晶面板包含有内嵌式触控模组。 本发明的另一个方面还提供了一种眼镜, 包括至少一个镜片, 该至少一 个镜片包括第二偏光片。
例如, 该眼镜还可以包括第二四分之一波长片, 其中所述第二四分之一 波长片和所述第二偏光片由所述眼镜的入光面指向出光面依次排列, 所述第 二四分之一波长片的快轴与所述第二偏光片的偏光轴之间呈第二预设角, 所 述第二预设角大于等于 0。 小于等于 90。 。
本发明的再一个方面还提供了一种显示系统, 该显示系统包括上述液晶 显示装置以及上述眼镜。
对于该显示系统, 例如, 当所述液晶显示装置和所述眼镜都不包括四分 之一波长片时, 所述第一偏光片和第二偏光片的偏光轴彼此垂直。
对于该显示系统, 例如, 如果所述液晶显示装置和所述眼镜各自包括四 分之一波长片, 则当所述第一预设角为 0。 或 90。 时, 所述第一和第二四分 之一波长片的快轴彼此平行或垂直, 且所述第一偏光片和第二偏光片的偏光 轴彼此垂直; 当所述第一预设角为 45° 时, 所述第二预设角为 45° ; 当所 述第一预设角为其余的角度 a时, 所述第一和第二四分之一波长片的快轴彼 此平行且所述第二预设角为 90。 -a, 或者所述第一和第二四分之一波长片的 快轴彼此垂直且所述第二预设角与第一预设角相等。 附图说明
为了更清楚地说明本发明实施例的技术方案, 下面将对实施例的附图作 筒单地介绍,显而易见地,下面描述中的附图仅仅涉及本发明的一些实施例, 而非对本发明的限制。
图 1为本发明实施例一提供的液晶显示装置的结构示意图;
图 2为本发明实施例一提供的全透射型液晶显示装置的结构示意图; 图 3为本发明实施例一提供的全反射型液晶显示装置的结构示意图; 图 4为本发明实施例二提供的专用眼镜的结构示意图;
图 5为本发明实施例二提供的专用目艮镜中偏光片的偏振方向与四分之一 波长片的快轴方向所成角的示意图;
图 6为本发明实施例三提供的显示系统的原理示意图;
图 7a和图 7b为本发明实施例四提供的液晶显示装置的结构示意图; 图 8为本发明实施例七提供的液晶显示装置的结构示意图。 具体实施方式
为使本发明实施例的目的、 技术方案和优点更加清楚, 下面将结合本发 明实施例的附图,对本发明实施例的技术方案进行清楚、 完整地描述。显然, 所描述的实施例是本发明的一部分实施例, 而不是全部的实施例。 基于所描 述的本发明的实施例, 本领域普通技术人员在无需创造性劳动的前提下所获 得的所有其他实施例, 都属于本发明保护的范围。
除非另作定义, 此处使用的技术术语或者科学术语应当为本发明所属领 域内具有一般技能的人士所理解的通常意义。 本发明专利申请说明书以及权 利要求书中使用的 "第一" 、 "第二" 以及类似的词语并不表示任何顺序、 数量或者重要性, 而只是用来区分不同的组成部分。 同样, "一个" 、 "一" 或 "该" 等类似词语也不表示数量限制, 而是表示存在至少一个。 "包括" 或者 "包含" 等类似的词语意指出现在 "包括" 或者 "包含" 前面的元件或 者物件涵盖出现在 "包括"或者 "包含"后面列举的元件或者物件及其等同, 并不排除其他元件或者物件。 "连接" 或者 "相连" 等类似的词语并非限定 于物理的或者机械的连接, 而是可以包括电性的连接, 不管是直接的还是间 接的。 "上" 、 "下" 、 "左" 、 "右" 等仅用于表示相对位置关系, 当被 描述对象的绝对位置改变后, 则该相对位置关系也可能相应地改变。
四分之一波长片的特性如下所述。
对于四分之一波长片, 当入射的线偏振光的偏振方向与该四分之一波长 片的快轴方向一致(即二者之间的夹角成 0° 时) 时, 此线偏振光透过该四 分之一波长片后仍然为线偏振光; 当入射的线偏振光的偏振方向与该四分之 一波长片的快轴方向成 45。 时,此线偏振光透过该四分之一波长片后就转换 为圓偏振光; 当入射的线偏振光的偏振方向与该四分之一波长片的快轴之间 为其它角度时, 此线偏振光通过四分之一波长片后转换为橢圓偏振光; 当入 射的线偏振光的偏振方向与该四分之一波长片的快轴方向垂直时(即二者之 间的夹角成 90° 时), 此时入射的线偏振光的偏振方向与该四分之一波长片 的慢轴方向一致, 此线偏振光透过该四分之一波长片后也仍然为线偏振光。
另外, 当入射的圓偏振光在通过四分之一波长片后, 将变为线偏振光, 该线偏振光的振动方向与该四分之一波长片的快轴方向成 45。 ; 当入射的橢 圓偏振光通过四分之一波长片后, 将变为线偏振光, 该线偏振光的振动方向 与该四分之一波长片的快轴方向的夹角为锐角且不等于 45度。
本发明的实施例提高了液晶显示装置的显示保密性。
实施例一
如图 1所示, 本实施例提供了一种液晶显示装置 100, 其包括液晶面板。 该液晶面板包括薄膜晶体管( TFT )阵列基板 10、彩膜基板 20以及位于 TFT 阵列基板 10和彩膜基板 20之间的液晶层 2。 在 TFT阵列基板 10的背离液 晶层 2的一侧设置有下偏光片 1 ; 在液晶层 2背离 TFT阵列基板 10的一侧 设置有四分之一波长片 3 , 四分之一波长片 3的快轴与所述下偏光片 1的偏 光轴(即透过轴)之间成第一预设角, 该第一预设角大于等于 0° 小于等于 90。 , 也即该第一预设角可以为 0。 到 90。 的任意角度。
这里, 彩膜基板 20是液晶面板中与阵列基板 10相对设置的对置基板的 一个示例, 对置基板与阵列基板相对设置以形成液晶盒, 并且四周通过封框 胶(未示出) 密封。 当液晶面板的阵列基板中包括彩膜结构时, 则对置基板 可以相应地不再包括彩膜结构。在图 1所示的示例中,彩膜基板 20位于液晶 层 20与四分之一波长片 3之间, 但是如下所述彩膜基板 20还可以设置在其 他位置。 该彩膜基板 20 并不包括另一偏光片, 即本实施例的液晶显示装置 100之中仅在阵列基板 10上设置一偏光片。
当然, 为便于对液晶显示装置的有益效果进行描述, 本实施例引入了用 于上述液晶显示装置的专用显示装置, 该专用显示装置例如可制备为眼镜形 式。
在本实施例提供的液晶显示装置 100中,其显示面板只具有下偏光片 1 , 入射的光线经下偏光片 1后被偏振成线偏振光, 该线偏振光透过液晶层 2后 射出; 根据液晶层 2的状态, 即液晶层 2是否对透过其的光进行相移, 相对 于入射到液晶层 2的线偏振光, 从液晶层 2出射的光偏振状态可以不变或被 偏移 90。 。 该显示面板相对于通常的液晶显示面板而言, 不具有上偏光片, 那么透过液晶层 2以出射到该显示面板之外的光在离开该显示面板之前不再 通过任何偏光片。
为便于描述,如图 1所示,所示区域 C和所示区域 D分别为亮态和暗态。 上述四分之一波长片 3的快轴与下偏光片 1的偏光轴之间具有第一预设角。
当上述第一预设角为 90。 或 0° 时, 透过下偏光片 1的线偏振光在透过 液晶层 2时, 其偏振方向旋转 90。 或者 0。 , 所得到的线偏振光与四分之一 波长片 3的快轴的夹角仍为 0° 或者 90。 , 因此透过四分之一波长片 3的光 仍然为线偏振光。
当上述第一预设角为 45。 时,透过下偏光片 1的线偏振光在透过液晶层 2时, 其偏振方向旋转 90。 或者 0。 , 所得到的线偏振光与四分之一波长片 3的快轴的夹角仍为 45° , 因此, 透过四分之一波长片 3的光为圓偏振光。
当上述第一预设角为其他锐角时, 透过下偏光片 1的线偏振光在透过液 晶层 2时, 其偏振方向旋转 90。 或者 0。 , 所得到的线偏振光与四分之一波 长片 3的快轴的夹角为锐角 (等于上述预设角或与上述预设角互为余角) , 且不为 45。 , 因此透过四分之一波长片 3的光为橢圓偏振光。
由于线偏振光、 圓偏振光以及橢圓偏振光, 其包含的信息在棵眼状态下 均无法看出, 所以人们在棵眼状态下无法直接从液晶显示装置 100识别出正 显示的信息。 对于从上述显示面板出射的光, 只有通过专用显示装置才能对 液晶显示装置 100的显示面板发出的光实现显示, 因此提高了液晶显示装置 100的保密性。
上述实施例中四分之一波长片 3的设置位置以及形成方式可以有多种选 择方式, 例如如下所述。
示例一, 上述四分之一波长片 3位于液晶显示装置 100的彩膜基板 10 朝向液晶层 2的一面。
例如, 上述四分之一波长片 3可以由液晶分子固化而成。
示例二, 上述四分之一波长片 3位于彩膜基板 10背离液晶层 2的一面。 示例三, 上述技术方案中提到的四分之一波长片 3与下偏光片 1的偏光 轴之间的第一预设角为锐角, 即不为 90° , 也不为 0° 。
优选地, 上述技术方案中四分之一波长片 3的快轴与下偏光片 1的偏光 轴之间的第一预设角为 45° 。 当四分之一波长片 3的快轴与下偏光片 1的偏 光轴之间的第一预设角为 45。 时,四分之一波长片 3可以将显示面板射出的 线偏振光转换为圓偏振光再射出。 此时, 在具有第二四分之一波长片和第二 偏光片的专用显示装置中, 该第二四分之一波长片的快轴与该第二偏光片的 偏光轴成 45。 ,该第二四分之一波长片在任意角度均可以将显示面板射出的 圓偏振光转换为线偏振光, 该线偏振光经第二偏光片用于实现暗态或亮态的 正常显示。 因此, 该示例增加了使用者观看是的舒适度。
当然, 上述技术方案中, 四分之一波长片 3的快轴与下偏光片 1的偏光 轴之间的第一预设角为其他锐角时, 四分之一波长片 3可以将显示面板发射 出的线偏振光转换为橢圓偏振光。 这样在具有第二四分之一波长片和第二偏 光片的专用显示装置中, 当专用显示装置中的四分之一波长片的快轴只有与 液晶显示装置发射的橢圓偏振光的光轴一致或垂直时, 专用显示装置的四分 之一波长片才能将橢圓偏振光转换为线偏振光, 进而再通过专用显示装置中 的偏光片才能正常显示 (具体如下所述) ; 而专用显示装置中的四分之一波 长片与液晶显示装置发射的橢圓偏振光的光轴之间的角度为其他角度时均无 法正常显示, 进一步提高了液晶显示装置的保密性。
优选实施方式中, 上述液晶显示装置的种类也可以由多种选择方式。 方式一, 上述液晶显示装置可以为全透射型。 此时, 例如, 该液晶显示 装置还可以包括位于下偏光片 1背离液晶层 2—侧的背光源 5。 液晶显示装 置中的光源来自背光源 5 , 其发出的光为自然光或类似自然光。 该背光源 5 例如可以选择本领域中公知的背光源。 该示例如图 2所示, 为筒单起见, 图 中未示出阵列基板和对置基板(例如彩膜基板) 。
方式二, 上述液晶显示装置可以为半透半反型。 例如, 下偏光片 1朝向 背光源 5的一面设置有预定图形的反射层(反射层图中未示出) 。
方式三, 上述液晶显示装置可以为全反射型。 例如, 下偏光片 1背离液 晶层 2的一侧设置有反射部 6。 该示例如图 3所示, 为筒单起见, 图中未示 出阵列基板和对置基板(例如彩膜基板) 。 外界的自然光通过四分之一波长 片 3、 液晶层 2之后仍然为自然光, 在经过下偏光片 1并且被反射部 6反射 之后转换为与下偏光片 1偏光轴方向一致的线偏振光, 区域 C内的线偏振光 经过液晶层 2之后, 转换成与原偏振方向垂直的线偏振光, 区域 D内的线偏 振光经过液晶层 2之后偏振方向不变。 例如, 两部分线偏振光经过四分之一 波长片 3之后转换为旋转方向相反的圓偏振光, 或者橢圓偏振光, 同样能够 提高保密性。
例如,上述反射部 6可以为位于下偏光片 1背离液晶层 2—面的反射层。 或者, 例如, 上述反射部 6还可以为贴附于下偏光片 1背离液晶层 2— 面的反射膜。
实施例二
如图 4和图 5所示, 本发明的实施例还提供了一种用于上述实施例一及 其示例中提供的任一种液晶显示装置的专用显示装置, 例如专用眼镜 4。 该 专用眼镜可以单独用于用户佩戴, 或者可以安装在头盔等之上供使用。
该专用眼镜 4包括至少一个镜片 41 ,通常包括两个镜片 41 ,每一个镜片 41具有由其入光面指向出光面依次排列的第二四分之一波长片 412和第二偏 光片 411。 所述四分之一波长片 412的快轴 b与所述偏光片 411的偏光轴 a 之间具有第二预设角 α , 且该第二预设角 α与上述液晶显示装置中四分之一 波长片 3的快轴与下偏光片 1的偏光轴之间所成的第一预设角相等, 或者与 该第一预设角之和为 90。 (即二者互为余角) 。
实施例三
如图 6所示, 本实施例提供了一种显示系统, 该显示系统包括实施例一 及其优选实施方式中提供的任一种液晶显示装置 100, 和实施例二中提供的 用于实施例一及其优选实施方式的专用显示装置, 例如专用眼镜 4。
该液晶显示装置 100和专用目艮镜 4彼此配合使用以实现保密显示。
上述专用眼镜 4中的第二四分之一波长片 412的快轴与第二偏光片 411 的偏光轴之间具有第二预设角 a , 且该第二预设角 α与上述第一预设角相等 或与第一预设角之和为 90° 。
当上述第一预设角为 90° 或 0° 时, 第二预设角 α为 0° 或者 90。 ; 当 四分之一波长片 3和第二四分之一波长片 412的快轴彼此平行或垂直时, 第 二偏光片 411的偏光轴与下偏光片 1的偏光轴之间相互垂直时, 用户通过专 用眼镜能够正常显示液晶显示装置的画面。
或者, 当上述第一预设角为 45。 时, 专用眼镜 4中第二四分之一波长片 412的快轴与第二偏光片 411的偏光轴之间的第二预设角 α为 45° , 此时专 用目艮镜 4中第二偏光片 411的偏光轴与液晶显示装置 100中下偏光片 1的偏 光轴之间的角度为任意值时, 均可以通过专用眼镜正常显示液晶显示装置的 画面。
或者, 当上述第一预设角为其他锐角 a时, 若专用眼镜 4中的第二四分 之一波长片 412的快轴与第二偏光片 411的偏光轴之间的第二预设角与上述 第一预设角相等, 则当两个四分之一波长片 (即液晶显示装置 100中的四分 之一波长片 3和专用眼镜中的第二四分之一波长片 412 ) 的快轴相互垂直时 (相应地, 第二偏光片 412与下偏光片 1的偏振方向彼此垂直) , 即此时这 两个四分之一波长片的作用相互 4氏消, 入射的线偏振光经过这两个四分之一 波长片后仍为线偏振光, 且以原来的偏振方向射出, 由此通过专用目艮镜 4能 够对液晶显示装置 100中的图像正常显示; 另外, 若专用眼镜 4中的第二四 分之一波长片 412的快轴与第二偏光片 411之间的第二预设角与第一预设角 之和为 90。 , 即第二预设角为 90。 -a, 则当液晶显示装置 100中的四分之一 波长片 3和专用眼镜 4中的第二四分之一波长片 412的快轴平行时(相应地, 第二偏光片 412与下偏光片 1的偏振方向之间的夹角为 90° -2a ) , 即此时 这两个四分之一波长片的作用相互叠加, 二者总的作用可以看作一个二分之 一波片, 支设入射线偏光与该二分之一波长片的快轴的夹角为 a (即第一预 设角) , 则出射的线偏振光会绕着该快轴方向转动 2a, 由此通过专用目艮镜 4 能够对液晶显示装置 100中的图像正常显示。
因此, 使用本实施例的显示系统提供的专用眼镜, 才能够对上述液晶显 示装置的图像正常显示。 也即, 只有使用上述专用眼镜的人员才能够看到液 晶显示装置上显示的图像, 而其他人员则无法看到液晶显示装置上显示的图 像, 因此该保密显示系统具有良好的显示保密性。
实施例四
如图 7a所示,本实施例提供了一种液晶显示装置 200,其包括液晶面板。 该液晶显示装置 200与实施例一的液晶显示装置 100相比, 区别在于不包括 四分之一波长片 3。 该液晶面板包括薄膜晶体管 (TFT ) 阵列基板 10、 例如 彩膜基板 20的对置基板以及位于 TFT阵列基板 10和彩膜基板 20之间的液 晶层 2。 本液晶显示装置 200中, 仅在 TFT阵列基板 10的背离液晶层 2的 一侧设置有下偏光片 1。 为了筒便起见, 该液晶显示装置 200的其他部分不 再详述。
下面对上述液晶显示装置实施例的原理进行说明。 为便于对液晶显示装 置 200的有益效果进行描述, 在此引入了用于上述液晶显示装置 200的专用 目艮镜 40, 该专用目艮镜 40包括具有第二偏光片的镜片。
在上述液晶显示装置中,如图 7a所示,其中,所示区域 C和所示区域 D 分别为亮态和暗态,仅在液晶面板的 TFT阵列基板背离液晶层 2的一侧具有 下偏光片 1 , 光线经下偏光片 1偏振成线偏振光, 线偏振光透过液晶层 2后 射出。 由于未经与下偏光片相匹配的另一偏光片滤光, 其包含的信息在棵眼 状态无法被识别。
实施例五
本实施例提供了一种用于上述实施例四的种液晶显示装置的专用显示装 置, 例如专用眼镜 40。 该专用眼镜 40可以单独用于用户佩戴, 或者可以安 装在头盔等之上供使用。该专用目艮镜 40与实施例二的专用目艮镜 4的区别在于 每个镜片仅包括第二偏光片, 而不包括第二四分之一波长片。
如图 7b所示, 当通过专用眼镜 40观看液晶面板时, 液晶面板射出的光 经过专用眼镜 40中的偏光片的滤光作用,能够被人眼识别,进而能够看到液 晶面板所显示的内容, 实现了对液晶显示装置 200中液晶面板所显示内容进 行防偷窥的保护。 实施例六
本实施例提供了一种显示系统, 该显示系统包括实施例四的液晶显示装 置和实施例五中提供的专用目艮镜。 在使用中, 该液晶显示装置 200的下偏光 片 1的偏光轴与该专用眼镜的第二偏光片的偏光轴彼此垂直。 类似于上述对 于实施例一中的液晶显示装置 100的描述, 从而液晶显示装置 200出射的光 为线偏振光, 其偏振方向可由于液晶层的作用不偏振或偏振 90。 , 从液晶显 示装置 200出射的线偏振光入射到专用眼镜上的第二偏光片之后可透射或被 阻挡, 从而实现亮态或暗态显示。
同样, 使用本实施例提供的专用目艮镜, 才能够对上述液晶显示装置的图 像正常显示, 而其他人员则无法看到液晶显示装置上显示的图像, 因此该保 密显示系统具有良好的显示保密性。
实施例七
在本发明上述实施例一、 四提供的液晶显示装置还可以进一步具有触控 功能, 例如在所述对置基板(例如彩膜基板)背离所述液晶层的一侧设置有 触控模组。
该触控模组的可以采用本领和已有的各种类型的外挂式触控模组, 例如 电容型、 电阻型或红外型触控模组等。 如图 8所示, 在实施例四的液晶显示 装置的对置基板 10靠外一侧设置有触控模组 50。
例如, 可以先制备触控模组的各层级结构, 然后将制备完成的触控模组 直接贴附在所述对置基板背离所述液晶层的一侧。 由于在本发明实施例的液 晶显示装置中在对置基板背离所述液晶层的一侧没有设置偏光片, 减少了触 控模组的贴合难度。 另外, 也可以直接在液晶面板的彩膜基板背离所述液晶 层的一侧制备触控模组的各层级结构, 在此不做限定。
进一步地, 在液晶显示装置中还可以采用内嵌式触控技术, 即将所述液 晶面板包含有内嵌式触控模组, 即在液晶面板内部直接制备组成触控结构的 各层级结构 (例如, 阵列基板的阵列结构) 。 内嵌触摸屏的具体实施方式可 以采用本领域已有的方案, 因此在此不作详述。
在现有的内嵌式触控模组中, 为了在实现触控功能时保护设置在对置基 板背离液晶层的一侧的偏光片不被划伤, 一般会在其上贴服钢化玻璃膜层。 而在本发明实施例提供的液晶显示装置中, 由于省去了设置在对置基板背离 液晶层的一侧的偏光片, 因此在采用内嵌式触控模组作为液晶面板时, 可以 直接使用钢化玻璃材料制作液晶面板中对置基板的村底基板, 省去现有的钢 化玻璃膜层, 能优化整个液晶显示装置的制备工艺。
同样, 本发明实施例提供的显示系统, 通过添加外挂式或内嵌式触控模 组, 可以进一步具有触控功能。
以上所述仅是本发明的示范性实施方式, 而非用于限制本发明的保护范 围, 本发明的保护范围由所附的权利要求确定。

Claims

权利要求书
1、 一种液晶显示装置, 包括液晶面板, 所述液晶面板包括薄膜晶体管 ( TFT )阵列基板、 对置基板以及位于所述 TFT阵列基板和对置基板之间的 液晶层,
其中, 所述 TFT阵列基板与所述对置基板相对设置, 所述液晶显示装置 仅在 TFT阵列基板上设置有第一偏光片。
2、根据权利要求 1所述的液晶显示装置, 其中, 所述对置基板上设置有 第一四分之一波长片, 所述第一四分之一波长片的快轴与所述第一偏光片的 偏光轴之间成第一预设角, 所述第一预设角大于等于 0。 小于等于 90。 。
3、根据权利要求 1所述的液晶显示装置, 其中, 所述第一四分之一波长 片位于所述对置基板朝向所述液晶层的一面。
4、根据权利要求 1所述的液晶显示装置, 其中, 所述第一四分之一波长 片位于所述对置基板背离所述液晶层的一面。
5、 根据权利要求 2~4任一项所述的液晶显示装置, 其中, 所述第一预 设角为锐角。
6、 根据权利要求 5所述的液晶显示装置, 其中, 所述预设角为 45。 。
7、 根据权利要求 1~6任一项所述的液晶显示装置, 还包括位于所述第 一偏光片背离所述液晶层一侧的背光源。
8、根据权利要求 7所述的液晶显示装置, 其中, 所述第一偏光片朝向所 述背光源的一面设置有预定图形的反射层。
9、 根据权利要求 1~8任一项所述的液晶显示装置, 其中, 所述第一偏 光片背离所述液晶层的一侧设置有反射部。
10、 根据权利要求 9所述的液晶显示装置, 其中, 所述反射部为位于所 述第一偏光片背离所述液晶层一面的反射层。
11、 根据权利要求 9所述的液晶显示装置, 其中, 所述反射部为贴附于 所述第一偏光片背离所述液晶层一面的反射膜。
12、 根据权利要求 1-11任一所述的液晶显示装置, 其中, 在所述对置基 板背离所述液晶层的一侧设置有触控模组。
13、 根据权利要求 1-11任一所述的液晶显示装置, 其中, 所述液晶面板 包含有内嵌式触控模组。
14、 一种眼镜, 包括至少一个镜片, 该至少一个镜片包括第二偏光片。
15、根据权利要求 14的目艮镜,还包括第二四分之一波长片, 其中所述第 二四分之一波长片和所述第二偏光片由所述眼镜的入光面指向出光面依次排 列, 所述第二四分之一波长片的快轴与所述第二偏光片的偏光轴之间呈第二 预设角, 所述第二预设角大于等于 0° 小于等于 90。 。
16、 一种显示系统, 包括如权利要求 1所述的液晶显示装置和如权利要 求 14所述的眼镜, 其中, 所述第一偏光片和第二偏光片的偏光轴彼此垂直。
17、 一种显示系统, 包括如权利要求 2所述的液晶显示装置和如权利要 求 15所述的眼镜, 其中,
当所述第一预设角为 0。 或 90。 时, 所述第一和第二四分之一波长片的 快轴彼此平行或垂直, 且所述第一偏光片和第二偏光片的偏光轴彼此垂直; 当所述第一预设角为 45° 时, 所述第二预设角为 45° ;
当所述第一预设角为其余的角度 a时, 所述第一和第二四分之一波长片 的快轴彼此平行且所述第二预设角为 90。 -a, 或者所述第一和第二四分之一 波长片的快轴彼此垂直且所述第二预设角与第一预设角相等。
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