WO2020030021A1 - 显示面板及显示设备 - Google Patents
显示面板及显示设备 Download PDFInfo
- Publication number
- WO2020030021A1 WO2020030021A1 PCT/CN2019/099701 CN2019099701W WO2020030021A1 WO 2020030021 A1 WO2020030021 A1 WO 2020030021A1 CN 2019099701 W CN2019099701 W CN 2019099701W WO 2020030021 A1 WO2020030021 A1 WO 2020030021A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- liquid crystal
- light
- electrode
- electrodes
- electrode layer
- Prior art date
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133512—Light shielding layers, e.g. black matrix
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0016—Grooves, prisms, gratings, scattering particles or rough surfaces
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133504—Diffusing, scattering, diffracting elements
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/13356—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements
- G02F1/133562—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements on the viewer side
-
- 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
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
- G02F2201/30—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 grating
-
- 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
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
- G02F2201/30—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 grating
- G02F2201/305—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 grating diffraction grating
Definitions
- the present application relates to the field of display technology, and in particular, the present application relates to a display panel and a display device.
- Common LCD (liquid crystal display) panels that do not require polarizers apply an electrical signal to the liquid crystal layer to make the liquid crystal layer exhibit the effect of a liquid crystal grating.
- common LCD panels have limited diffractive capabilities, so that only a small portion of light can be diffracted out of the panel. The light output efficiency of such an LCD panel is low, which limits the application of the LCD in some special scenarios (such as transparent display).
- a display panel includes: a base substrate and a plurality of light-shielding strips arranged on the base substrate, wherein the base substrate includes a plurality of light-shielding regions defined by the plurality of light-shielding strips and a transparent region between the light-shielding regions.
- a backlight module including a light guide plate and a light extraction grating, wherein the light extraction grating is configured to couple out light in the light guide plate; and a first portion located between the base substrate and the light guide plate
- An electrode layer, a second electrode layer, and a liquid crystal layer wherein the first electrode layer includes a plurality of first electrodes spaced apart from each other, and the second electrode layer includes a plurality of second electrodes spaced apart from each other; wherein the first The electrode layer and the second electrode layer are configured to control the liquid crystal layer in response to a control signal so that the liquid crystal layer forms a plurality of liquid crystal grating periods, wherein the liquid crystal in each liquid crystal grating period includes a plurality of liquid crystals having different refractive indices And a refractive index of the plurality of segments increases in a direction perpendicular to an extending direction of the first electrode.
- the first electrode layer and the second electrode layer are located on the same side of the liquid crystal layer and are electrically insulated, and the orthographic projections of the plurality of first electrodes on the backlight module are different from those of the backlight module.
- the orthographic projections of the plurality of second electrodes on the backlight module are non-overlapping and each first electrode is configured to control the refractive indices of two of the segments.
- one liquid crystal grating period of the plurality of liquid crystal grating periods corresponds to M electrodes
- the M electrodes include a plurality of first electrodes and a plurality of second electrodes
- the plurality of first electrodes The electrode and the plurality of second electrodes are located in different layers and there is no overlapping area of the orthographic projection on the backlight module.
- the n-1th orthographic projection corresponds to The voltage difference between the electrode and the electrode corresponding to the nth orth normal projection is smaller than the voltage difference between the electrode corresponding to the nth orth normal projection and the electrode corresponding to the n + 1th orth normal projection, where M is greater than Or a positive integer of 3, n is a positive integer greater than or equal to 2, and M is greater than n.
- the first electrode layer and the second electrode layer are both formed on one side of the base substrate, or the first electrode layer and the second electrode layer are both formed on the substrate One side of the backlight module.
- the first electrode layer and the second electrode layer are located on different sides of the liquid crystal layer, and each of the plurality of first electrodes is on the backlight module.
- the orthographic projection overlaps with the orthographic projection of the corresponding second electrode of the plurality of second electrodes on the backlight module, and each first electrode is configured to control the refractive index of one of the segments.
- one liquid crystal grating period of the plurality of liquid crystal grating periods corresponds to J first electrodes, and among the J first electrodes, in response to the control signal, the kth first The voltage difference between the electrode and its corresponding second electrode is less than the voltage difference between the k + 1th first electrode and its corresponding second electrode, where J is a positive integer greater than or equal to 2, and k is greater than or equal to A positive integer of 1 and J is greater than k.
- the first electrode layer is formed on one side of the base substrate and the second electrode layer is formed on one side of the backlight module, or the second electrode layer is formed on an One side of the base substrate and the first electrode layer are formed on one side of the backlight module.
- the first electrode and the second electrode are strip electrodes that are parallel to each other.
- the first electrodes corresponding to each liquid crystal grating period are arranged equidistantly, and the second electrodes corresponding to each liquid crystal grating period are arranged equidistantly.
- a distance between two adjacent first electrodes of the plurality of first electrodes corresponding to each liquid crystal grating period is less than 1 micrometer, and the plurality of corresponding first liquid crystal grating periods corresponds to the plurality of first electrodes.
- the distance between two adjacent second electrodes in the second electrode is less than 1 micron.
- an orthographic projection of the light-shielding area on the backlight module covers the light extraction grating.
- one to six liquid crystal grating periods are correspondingly provided with one to six of the first electrodes.
- the liquid crystal layer includes a nematic liquid crystal.
- the thickness of the liquid crystal layer ranges from 0.1 micrometer to 10 micrometers.
- the backlight module includes a monochromatic light source located on a light incident surface of the light guide plate, and is configured to emit light to be coupled to the light guide plate via the light incident surface.
- the display panel further includes a flat layer interposed between the backlight module and the diffractive element.
- a display device including the display panel according to any embodiment of the present disclosure.
- FIG. 1 schematically illustrates a cross-sectional view of a display panel according to an embodiment of the present disclosure
- FIG. 2 schematically illustrates a specific structure of the display panel of FIG. 1;
- FIG. 3 schematically illustrates a refractive index distribution of a liquid crystal layer in a display panel according to an embodiment of the present disclosure
- FIG. 5 schematically illustrates an electric field distribution of a diffractive element of the display panel of FIG. 2;
- FIG. 6 schematically illustrates another specific structure of the display panel of FIG. 1;
- FIG. 7 schematically illustrates an electric field distribution of a diffractive element of the display panel of FIG. 6;
- FIG. 8 schematically illustrates a top view of a display panel according to an embodiment of the present disclosure.
- FIG. 9 schematically illustrates a light path diagram in a display panel according to an embodiment of the present disclosure.
- LCD panels generally use a lower polarizer to polarize the light emitted by the backlight module, and then use a liquid crystal layer to modulate the light that has been polarized for the first time, and then use a color filter to filter the modulated light so that only a specific color of light Can pass through, and finally use the upper polarizer to analyze, so as to achieve the basic display function.
- the upper polarizer, the lower polarizer, the color filter, and even the array substrate will affect the light output efficiency of the LCD. Therefore, the light output efficiency of common LCD panels is low. This limits the application of LCDs in certain special situations (such as transparent display).
- the light emitting portion of the backlight module is aligned with the light-shielding area of the pixel.
- the liquid crystal layer can be formed as a liquid crystal grating to diffract light emitted from the backlight module, so that the light originally irradiated to the light-shielding strip is changed in the traveling direction and irradiated to the light-transmitting area, thereby emitting from the display panel.
- the conventional liquid crystal grating has a limited diffractive ability, and the maximum angle of its diffraction is 21.4 degrees.
- the two electrode layers of a conventional liquid crystal layer are an entire common electrode and a pixel electrode separated from each other.
- the liquid crystal grating driven by the electric field formed by such electrodes can only diffract a small part of the light from the light transmitting area. Most of the light is still blocked by the shading strips in the shading area.
- the main efficiency of the diffracted light is concentrated on the 0th order and ⁇ 1st order.
- the current diffraction efficiency is only 15%, making the light extraction efficiency low.
- FIG. 1 schematically illustrates a cross-sectional view of a display panel according to an embodiment of the present disclosure.
- the display panel 100 includes a base substrate 103 and a plurality of light shielding strips 1057 arranged on the base substrate.
- the light-shielding strip defines a light-shielding region 1051 on the base substrate 103.
- the light-transmitting area 1052 is arranged between the light-shielding areas.
- the display panel 100 includes a plurality of pixel units 105 arranged in an array. Each pixel unit contains a fragment of a light-shielded area.
- each pixel unit 105 includes a central light-shielding region 1052 and light-transmitting regions on both sides of the light-shielding region 1052.
- the light-transmitting region 1051 may surround the periphery of the light-shielding region 1052.
- the display panel 100 further includes a combination of the backlight module 101 and a first electrode layer, a second electrode layer, and a liquid crystal layer controlled by the backlight module 101 and the substrate substrate 103.
- the assembly can also be briefly described as the diffractive element 104.
- the diffractive element is located at the optical downstream of the backlight module.
- optical downstream means that the diffractive element 104 is configured to receive light from the backlight module 101. .
- FIG. 2 schematically illustrates a specific structure of the display panel of FIG. 1.
- the backlight module 101 includes a light guide plate 1012 and a light extraction grating 1013.
- the light extraction grating 1013 is configured to couple out light in the light guide plate 1012 and further collimate the light.
- the light-shielding area 1052 includes a light-shielding strip 1057.
- the light-shielding strip 1057 is strip-shaped, and can block out light that is decoupled and collimated without applying a control signal to the liquid crystal layer.
- the light extraction grating 1013 collimates the coupled light in a direction perpendicular to the light-shielding strip 1057, so that when the control signal is not applied to the first electrode and the second electrode, the coupled-out and collimated light will be irradiated to the light-shielding strip 1057. on. At this time, the pixel unit 105 is displayed in black.
- the display panel may include a first electrode layer 1041, a second electrode layer 1042, and a liquid crystal layer 1043 located between the base substrate and the light guide plate.
- the first electrode layer 1041 includes a plurality of first electrodes 1045 spaced from each other.
- the second electrode layer 1042 includes a plurality of second electrodes 1046 spaced from each other.
- the display panel also includes a controller that generates a control signal.
- the first electrode layer 1041 and the second electrode layer 1042 are configured to jointly control the liquid crystal layer 1043 in response to a control signal at the same time, so that the liquid crystal layer 1043 forms a plurality of liquid crystal grating periods.
- the liquid crystal in each liquid crystal grating period includes a plurality of liquid crystal segments (referred to simply as segments) with different refractive indices. Each segment has an independent refractive index. The refractive index of each segment depends on the parameters of the electric field in which the segment is located, and the parameters of the electric field are determined by control signals applied to the first and second electrodes forming the electric field. In this application, the "corresponding relationship" between the liquid crystal grating period, the liquid crystal segment and the electrode means that the refractive index of the liquid crystal segment can be controlled by the electrode, and these liquid crystal stages form the liquid crystal grating period.
- the first electrode 1045 of the first electrode layer 1041 and the second electrode 1046 of the second electrode layer 1042 of the present disclosure are both arranged in a spaced manner, so that the voltage of the first electrode and the second electrode can be controlled by a controller to control
- the refractive index of each liquid crystal segment is such that the refractive index of a segment within a single liquid crystal grating period increases in a direction perpendicular to the extending direction of the first electrode.
- the optical effect of the liquid crystal grating is equivalent to the optical effect of the blazed grating, which causes the light from the backlight module 101 to be diffracted by the diffractive element at a larger diffraction angle (for example, greater than 21.4 °) and emitted from the light transmission region 1051.
- FIG. 3 schematically shows a refractive index profile in a plurality of liquid crystal grating periods of a local liquid crystal layer.
- the arrow direction in FIG. 3 indicates a direction perpendicular to the extending direction of the first electrode 1045.
- the refractive index of the liquid crystal segment increases in a direction perpendicular to the extending direction of the first electrode. Since the thickness of the liquid crystal layer is substantially the same, the change tendency of the refractive index is equal to the change tendency of the optical path difference. That is, in a liquid crystal grating period, the optical path difference is increasing along the direction perpendicular to the extending direction of the first electrode.
- Such an optical path difference attribute of the liquid crystal grating of the present disclosure is basically consistent with the optical path difference attribute of the blazed grating, so that an optical effect substantially consistent with the blazed grating can be achieved, so that light incident on the liquid crystal layer is deflected at a larger diffraction angle. fold.
- a liquid crystal grating period can include 2-6 liquid crystal segments. Since a first electrode can control 1-2 liquid crystal segments, a liquid crystal grating period corresponds to 1-6 first electrodes.
- FIG. 4 schematically illustrates a diffracted light path diagram of a transmission type blazed grating.
- the optical path difference ⁇ is the optical path difference between the center of the single slit aperture and the edge in the diffraction direction, which satisfies the following formula:
- a blaze wavelength ⁇ can be obtained.
- the refractive index of the liquid crystal segment within the period of the liquid crystal grating of the present application increases, which can be understood as the increase in the thickness of the segment under the condition that the refractive index does not change, which is equivalent to a blazed grating. Therefore, the liquid crystal layer in the display panel of the present disclosure can achieve an optical effect similar to a blazed grating under the control of the first electrode layer and the second electrode layer.
- Slotted angle of the shining grating Reflects the trend of refractive index changes. Slot angle The larger the change rate of the refractive index of the liquid crystal segment is.
- the grooved surface and the grating surface of the blazed grating are not parallel, and there is an angle between them (groove angle )
- groove angle To separate the central principal maxima of a single grooved surface 401 from the interference zero-order principal maxima of each grooved surface, transfer the light energy from the interference zero-order principal maxima and concentrate them on a certain level of the spectrum to achieve the spectrum Shine.
- the width a of the grooved surface 401 of the blazed grating is approximately equal to the width d (that is, the period) of the grating surface 402.
- the spectra of other orders of the wavelength ⁇ almost coincide with the extremely small positions of the diffraction of the single grooved surface 401.
- the spectral intensity is small.
- the blazed spectrum accounts for more than 90% of the total light energy.
- each period of the liquid crystal grating is divided into n stages to generate a multi-stage (step) phase profile grating. Adjacent steps will produce a phase difference of 2Pi / n, which achieves a phase modulation similar to that of a binary step grating to incident light.
- Pi is the pi, and it can also be represented by the Greek letter ⁇ , which is a mathematical constant that exists in mathematics and physics.
- a cycle can contain two, four, six or even more steps.
- the increase direction of the refractive index of the liquid crystal segment in each liquid crystal grating period is the same as shown in FIG. 4, the light emitted by the backlight module after each liquid crystal grating period is deflected in the same direction. It can be understood that if the refractive index of the liquid crystal segments is arranged in the opposite direction, the light emitted by the backlight module is deflected toward the other side of the grating surface normal.
- the refractive index of a liquid crystal segment in a part of the liquid crystal grating period can be made according to The refractive index of the liquid crystal segments in another part of the liquid crystal grating period is arranged in the opposite increasing direction.
- the diffractive element 104 can adjust the propagation direction of the light emitted by the backlight module 101.
- the amount of emitted light can be controlled by controlling the diffraction angle of the light, thereby achieving grayscale display.
- the light emitted and collimated through the light extraction grating 1013 of the backlight module 101 irradiates the light-shielding strip 1057 and is absorbed. At this time, no light is emitted from the pixel, and the pixel is displayed in a dark state.
- the refractive indexes of the liquid crystal layer 103 are adjusted to form the morphology of the blazed grating equivalently.
- the liquid crystal layer 103 adjusts the phase of the collimated light, so that the propagation direction of the light emitted by the backlight module 101 is adjusted.
- the diffractive element of the present disclosure can diffract light with a larger diffraction angle, so that more light is emitted from the light-transmitting region 1051 and partially blocked in the light-shielding region 1052, so as to achieve a technical effect of greatly increasing light-extraction efficiency.
- the diffractive element 104 includes a first electrode layer 1041, a second electrode layer 1042, and a liquid crystal layer 1043.
- the first electrode layer 1041 includes first electrodes 1045 arranged periodically.
- the second electrode layer includes second electrodes 1046 arranged periodically.
- both the first electrode layer 1042 and the second electrode layer 1043 are disposed on a base substrate.
- the first electrode layer 1042 and the second electrode layer 1043 are both disposed on a light guide plate (ie, a backlight module).
- the first electrode layer 1041 and the second electrode layer 1042 are configured to form an electric field to deflect liquid crystal molecules in the liquid crystal layer 1043, thereby adjusting the refractive index of the liquid crystal layer 1043 to form a blazed grating. Effect of liquid crystal grating.
- the first electrodes 1045 may be arranged at equal intervals, and the second electrodes 1046 may also be arranged at equal intervals.
- the distance between the two closest first electrodes 1045 in two adjacent liquid crystal grating periods is not necessarily equal to the distance between the first electrodes 1045 in a single optical period.
- the distance between two closest second electrodes 1046 in two adjacent liquid crystal grating periods is not necessarily equal to the distance between the second electrodes 1046 in a single liquid crystal grating period.
- the liquid crystal layer 1043 may be a nematic liquid crystal or other liquid crystals.
- the thickness of the liquid crystal layer 1043 may be 0.1 ⁇ m to 10 ⁇ m, and is used to form a liquid crystal grating under the driving of the first electrode 1041 and the second electrode 1042.
- the propagation direction of the incident light is changed, so that the light originally irradiated to the light-shielding strip 1057 is emitted from the light-transmitting area 1051.
- Light having a larger light energy is emitted from the light-transmitting area 1051 to achieve a technical effect of greatly increasing light-extraction efficiency.
- the first electrode layer 1041 and the second electrode layer 1042 are located on the same side of the liquid crystal layer 1043.
- the first electrode layer 1041 and the second electrode 1042 are electrically insulated.
- the orthographic projection of the first electrode 1045 on the backlight module 101 and the orthographic projection of the second electrode 1046 on the backlight module 101 do not overlap. If the base substrate 103 is used as a reference, there is no overlap between the orthographic projection of the first electrode 1045 on the base substrate 103 and the orthographic projection of the second electrode 1046 on the base substrate 103.
- the first electrode layer 1041 and the second electrode layer 1042 can be electrically insulated by an insulating layer 1044.
- the first electrode layer 1041 and the second electrode layer 1042 may be located on a side of the liquid crystal layer 1043 near the backlight module 101.
- a voltage signal is applied to the first electrode 1045 and the second electrode 1046 to form an electric field.
- the first electrodes 1045 and the second electrodes 1046 are staggered, that is, the orthographic projection of the first electrode 1045 on the backlight module 101 and the orthographic projection of the second electrode 1046 on the backlight module 101 do not overlap.
- the resulting electric field is a horizontal electric field. Through the electric field, the refractive index of the liquid crystal layer 1043 can be changed, so that the liquid crystal layer 1043 can achieve the effect of a blazed grating.
- FIG. 5 schematically illustrates an electric field distribution of the display panel of FIG. 2 in a display operation.
- the controller By enabling the controller to independently supply power to each of the first electrode 1045 and each of the second electrode 1046, the electric field formed in the liquid crystal layer can be controlled so that the liquid crystal layer exhibits multiple liquid crystal grating periods, and each liquid crystal grating period includes a refractive index having a different refractive index. A plurality of segments, and the refractive indices of these regions increase in a direction perpendicular to the extending direction of the first electrode.
- the strength of the electric field determines the refractive index of the liquid crystal segment, and the strength of the electric field depends on the voltage of the electrode forming the electric field
- the voltage of each first electrode and the second electrode can be adjusted by the controller to adjust each liquid crystal cell.
- the first electrode layer and the second electrode layer in FIG. 5 are arranged on the same layer of the liquid crystal layer, and the orthographic projections of the first electrode and the second electrode on the backlight module do not overlap.
- the M first electrodes and second electrodes form M orthographic projections on the backlight module.
- the second electrode 1046 and the first electrode 1045 on both sides form different electric fields
- the first electrode 1045 and the second electrode 1046 on both sides form different electric fields.
- the intensity of the electric field in one period is increased in a direction perpendicular to the extending direction of the first electrode.
- the voltages of the respective first electrodes and the second electrodes may be set such that the interval between the first first electrode and the first second electrode in a direction perpendicular to the extending direction of the first electrode in the period of the liquid crystal grating
- the voltage difference is less than the voltage difference between the first second electrode and the second first electrode
- the voltage difference between the first second electrode and the second first electrode is less than the second first electrode and the second Voltage difference between two second electrodes, and so on.
- the electrode corresponding to the (n-1) th orthographic projection and the nth orthographic projection in response to the control signal, the electrode corresponding to the (n-1) th orthographic projection and the nth orthographic projection
- the voltage difference between the corresponding electrodes is smaller than the voltage difference between the electrode corresponding to the nth orth forward projection and the electrode corresponding to the n + 1th orth forward projection, where M is a positive integer greater than or equal to 3, n is a positive integer greater than or equal to 2, and M is greater than n.
- one first electrode may form different and asymmetric electric fields with two adjacent second electrodes, respectively, so that the refractive indices of the liquid crystal segments in the two electric fields can be controlled individually.
- each first electrode 1045 corresponds to two liquid crystal segments.
- the electric field on both sides of each strip electrode is symmetrical, so the liquid crystal segment formed by these two electric fields
- the refractive index of is the same and cannot be increased in a direction perpendicular to the extending direction of the first electrode, so the liquid crystal grating described in this disclosure cannot be formed.
- FIG. 6 schematically illustrates a cross-sectional view of a display panel according to another implementation example of the present disclosure.
- the first electrode layer 1041 and the second electrode layer 1042 are located on different sides of the liquid crystal layer 1043. That is, the liquid crystal layer 1043 is located between the first electrode layer 1041 and the second electrode layer 1042.
- the first electrode layer 1041 may be located on the backlight module and the second electrode layer 1042 may be located on the base substrate 103.
- the first electrode layer 1041 may be located on a base substrate and the second electrode layer 1042 may be located on a backlight module.
- the first electrode 1045 and the second electrode 1046 are aligned, that is, the orthographic projection of the first electrode 1045 on the backlight module 101 and the orthographic projection of the second electrode 1046 on the backlight module 101 overlap.
- a voltage signal is applied to the first electrode 1045 and the second electrode 1046 to form an electric field.
- the first electrode 1045 and the second electrode 1045 are aligned and the electric field formed is a vertical electric field.
- the electric field changes the refractive index of the liquid crystal layer 1043, so that the liquid crystal layer 1043 achieves the effect of a blazed grating.
- FIG. 7 schematically illustrates an electric field distribution of the display panel of FIG. 6 in a display operation.
- each first electrode 1045 corresponds to a liquid crystal segment.
- the refractive index of each liquid crystal segment can be controlled independently, and the refractive indices of adjacent liquid crystal segments can be different, so that the liquid crystal layer can achieve a refractive index distribution such as a blazed grating, thereby achieving a large diffraction angle of the blazed grating.
- the direction of the electric field is indicated by the arrow direction in FIG. 7, and the length of the dashed line represents the electric field strength.
- the first electrode 1045 and the second electrode 1046 whose projections are superposed are made into a pair of electrodes. In order to form the electric field shown in FIG.
- each pair of electrodes in a liquid crystal grating period can be powered by the controller.
- the controller may make the voltage difference of the first pair of electrodes in a direction perpendicular to the extension direction of the first electrode smaller than the voltage difference of the second pair of electrodes, and the voltage difference of the second pair of electrodes is smaller than the voltage difference of the third pair of electrodes. . With this, the voltage difference between the electrode pairs is increased in a direction perpendicular to the extending direction of the first electrode.
- a liquid crystal grating period includes J first electrodes, among the J first electrodes, in response to the control signal, the distance between the k-th first electrode and its corresponding second electrode
- the voltage difference is less than the voltage difference between the k + 1th first electrode and its corresponding second electrode, where J is a positive integer greater than or equal to 2, k is a positive integer greater than or equal to 1, and J is greater than k.
- the first electrode 1041 and the second electrode 1042 are parallel strip electrodes.
- the distance between two adjacent first electrodes 1041, especially the first electrodes in a liquid crystal grating period may be less than 1 micron.
- the distance between two adjacent second electrodes 1042, especially the second electrodes in a liquid crystal grating period may be less than 1 micron.
- the backlight module 101 further includes a monochromatic light source 1011.
- the monochromatic light source 1011 is located on the light incident surface of the light guide plate 1012.
- the light extraction grating 1013 is located on a light emitting surface of the light guide plate 1012.
- the light extraction grating 1013 is used for taking out the light incident on the light guide plate 1012 from the monochromatic light source 1011 into the light guide plate 1012 at a collimating angle. Since the blazed grating has a spectroscopic function, in order to better control the diffraction angle, a monochromatic light source is selected in some embodiments.
- the monochromatic light source may be a blue light source.
- the light emitted from the monochromatic light source 1011 is coupled into the light guide plate 1012 from the light incident surface of the light guide plate 1012 at different incident angles.
- the light coupled into the light guide plate 1012 is transmitted in the light guide plate 1012 using total reflection.
- the light extraction grating 1013 located on the light exit surface of the light guide plate 1011 extracts the light from the monochromatic light source 1011 in the light guide plate 1012 at a collimating angle.
- the monochromatic light source 1011 provided in the embodiment of the present application may be a light emitting diode (LED), a micro light emitting diode (Micro LED) chip formed by a transfer method, or an organic light emitting diode.
- Micro LEDs have higher brightness, better luminous efficiency and lower power consumption than OLEDs. Since the blazed grating has a light splitting effect, the display panel of the present disclosure selects a monochromatic light source to better control the diffraction direction.
- the structure of the monochromatic light source 1011 may include a light directing device, such as a lens, a parabolic reflector, a bevel reflector, and the like.
- the light directing device converges the divergent light and couples it into the light guide plate 1012 at a smaller divergence angle, for example, couples the light into the light guide plate 1012 at a small range of incidence angles greater than the total reflection angle.
- FIG. 8 schematically illustrates a top view of a display panel according to an embodiment of the present disclosure.
- the shading strips are arranged laterally, and in some embodiments span multiple sub-pixels (see FIG. 8), or even across multiple pixels.
- the light extraction grating 1013 is indicated by a white dotted frame in FIG. 8. Each sub-pixel has a separate light extraction grating.
- the orthographic projection of the light-shielding area 1052 on the backlight module 101 covers the light-taking grating 1013. In other words, the orthographic projection of the light extraction grating 1013 on the base substrate 103 and the orthographic projection of the light-shielding region 1052 on the base substrate 103 overlap.
- the light extraction grating 1013 may be located on the upper surface of the light guide plate 1012 (that is, the side of the light guide plate 1012 facing the liquid crystal layer 1043), or on the lower surface of the light guide plate 1012 (the side of the light guide plate 1012 facing away from the liquid crystal layer 1043). When the light extraction grating 1013 is located on the upper surface of the light guide plate 1012, the light extraction grating 1013 directly couples the light irradiated to the light guide plate 1012 from the light guide plate 1012.
- the light extraction grating 1013 When the light extraction grating 1013 is located on the lower surface of the light guide plate 1012, the light extraction grating 1013 reflects the light irradiated to the light guide plate 1012, and passes through the upper surface to be coupled out of the light guide plate 1012.
- the light extraction grating 1013 When the light extraction grating 1013 is located on the upper surface of the light guide plate 1012, the optical path length of light reaching the base substrate 103 is small. Therefore, in order to further improve light efficiency, the light extraction grating 1013 may be specifically disposed on the upper surface of the light guide plate 1012.
- the display device When the light extraction grating 1013 is disposed on the upper surface of the light guide plate 1012, the display device further includes a flat layer 106 disposed on the light extraction grating 1013.
- the flat layer 106 can flatten the side of the backlight module 101 facing the diffractive element 104.
- the flat layer 106 may include a low refractive index material.
- the thickness of the flat layer 106 may be greater than or equal to 1 m, so as to better planarize the light extraction grating 1013. When the thickness of the flat layer 106 is 1 m or more, it is easier to implement.
- the display device in the embodiment of the present application further includes alignment layers 107 on both sides of the liquid crystal layer 1043. Only the alignment layer 107 located above the liquid crystal layer 1043 is shown in FIGS. 2 and 6.
- the alignment layer 107 is configured to set a pretilt angle of liquid crystal molecules in the liquid crystal layer 1043. For brevity, the specific setting method of the orientation layer 107 will not be repeated here.
- the light transmitting region 1051 includes a quantum dot material.
- the light transmitting region 1051 may include a red quantum dot material region, a green quantum dot material region, and a blue quantum dot material region.
- a crosstalk prevention region 1056 is provided between adjacent quantum dot material regions to prevent light emitted by a backlight module in one pixel unit from irradiating the adjacent quantum dot material regions to cause color shift.
- the quantum dot material located around a light-shielding region 1052 is the same kind of quantum dot material. The colors of the quantum dot materials around the adjacent light-shielding regions 1052 are different.
- the light generated by the monochromatic light source 1011 excites the quantum dots in the red quantum dot material region, the green quantum dot material region, and the blue quantum dot material region to realize a color display.
- quantum dot materials have good scattering properties.
- the collimated light emitted from the red quantum dot material area, the green quantum dot material area, and the blue quantum dot material area can be scattered to increase the viewing angle.
- the display device provided in the embodiment of the present application can generate a horizontal or vertical electric field by applying a certain voltage signal to the first electrode 1045 and the second electrode 1046, so that the liquid crystal of the liquid crystal layer 1043 can be deflected to adjust the
- the refractive index is equivalent to the effect of forming a blazed grating, thereby achieving the technical effect of greatly increasing the light output efficiency.
- FIG. 9 schematically illustrates a light path diagram inside a display panel according to an embodiment of the present disclosure.
- the liquid crystal blazed grating refers to a liquid crystal grating structure capable of realizing the optical effect of a conventional blazed grating.
- the liquid crystal blazed grating diffracts the collimated light incident from the light extraction grating 1013 and changes the direction of light propagation.
- the liquid crystal grating period of the liquid crystal layer corresponding to one pixel unit may include two opposite refractive index increasing directions.
- the refractive index of the liquid crystal grating period in the left half of the pixel unit may decrease from left to right, and the refractive index of the liquid crystal grating period in the right half may increase from left to right, so that the collimated light Deflection in different directions. This can be adjusted by controlling the voltage of the first electrode and the second electrode.
- a display device includes a display panel according to an embodiment of the present disclosure.
- the liquid crystal layer of the display device provided in the embodiments of the present application can present optical properties such as a blazed grating when a pixel needs to be displayed, and adjust the propagation direction of the light emitted from the backlight module, so that when light is emitted from the light-transmitting area of the pixel unit, Able to realize grayscale display.
- the diffractive element When no voltage is applied to the diffractive element, the collimated light emitted from the light emitting surface of the backlight module is irradiated to the light-shielding strips of the light-shielding area and absorbed.
- first and second are used for naming purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as “first” and “second” may explicitly or implicitly include one or more of the features. In the description of the present disclosure, unless otherwise stated, “multiple” and “several” mean two or more.
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Geometry (AREA)
- Diffracting Gratings Or Hologram Optical Elements (AREA)
- Liquid Crystal (AREA)
Abstract
Description
Claims (17)
- 一种显示面板,包括:衬底基板和布置在所述衬底基板上的多个遮光条,其中所述衬底基板包括由所述多个遮光条限定的多个遮光区和位于遮光区之间的透光区;背光模组,包括导光板和取光光栅,其中所述取光光栅配置成将所述导光板内的光耦出;和位于所述衬底基板和所述导光板之间的第一电极层、第二电极层和液晶层,其中所述第一电极层包括彼此间隔的多个第一电极,所述第二电极层包括彼此间隔的多个第二电极;其中所述第一电极层和所述第二电极层被配置成响应于控制信号控制所述液晶层,使得所述液晶层形成多个液晶光栅周期,其中每个液晶光栅周期内的液晶包括折射率不同的多个节段,并且所述多个节段的折射率沿垂直于所述第一电极的延伸方向的方向递增。
- 根据权利要求1所述的显示面板,其中所述第一电极层和所述第二电极层位于所述液晶层的同侧且电绝缘,所述多个第一电极在所述背光模组上的正投影与所述多个第二电极在所述背光模组上的正投影无交叠并且每个第一电极配置成控制两个所述节段的折射率。
- 根据权利要求2所述的显示面板,其中,所述多个液晶光栅周期中的一个液晶光栅周期对应于M个电极,所述M个电极包括多个第一电极和多个第二电极,并且所述多个第一电极和多个第二电极位于不同层且在所述背光模组上的正投影无重叠区,响应于所述控制信号,在所述M个电极中,第n-1个正投影所对应的电极与第n个正投影所对应的电极之间的电压差小于所述第n个正投影所对应的电极与第n+1个正投影所对应的电极之间的电压差,其中M是大于或等于3的正整数,n是大于或等于2的正整数,且M大于n。
- 根据权利要求2所述的显示面板,其中所述第一电极层和所述第二电极层均形成在所述衬底基板的一侧,或所述第一电极层和所述第二电极层均形成在所述背光模组的一侧。
- 根据权利要求1所述的显示面板,其中所述第一电极层和所述第二电极层位于所述液晶层的异侧,所述多个第一电极中的每个第一 电极在所述背光模组上的正投影与所述多个第二电极中的对应的第二电极在所述背光模组上的正投影交叠,并且每个第一电极配置成控制一个所述节段的折射率。
- 根据权利要求2所述的显示面板,其中,所述多个液晶光栅周期中的一个液晶光栅周期对应于J个第一电极,并且在所述J个第一电极中,响应于所述控制信号,第k个第一电极与其所对应的第二电极之间的电压差小于第k+1个第一电极与其对应的第二电极之间的电压差,其中J是大于或等于2的正整数,k是大于或等于1的正整数,且J大于k。
- 根据权利要求6所述的显示面板,其中所述第一电极层形成在所述衬底基板的一侧且所述第二电极层形成在所述背光模组的一侧,或者所述第二电极层形成在所述衬底基板的一侧且所述第一电极层形成在所述背光模组的一侧。
- 根据权利要求2或5所述的显示面板,其中所述第一电极和所述第二电极是相互平行的条状电极。
- 根据权利要求8所述的显示面板,其中每个液晶光栅周期对应的所述第一电极等距地排列,并且每个液晶光栅周期所对应的所述第二电极等距地排列。
- 根据权利要求9所述的显示面板,其中每个液晶光栅周期对应的所述多个第一电极中相邻的两个第一电极之间的距离小于1微米,并且每个液晶光栅周期所对应的所述多个第二电极中相邻的两个第二电极之间的距离小于1微米。
- 根据权利要求1所述的显示面板,其中所述遮光区在所述背光模组上的正投影覆盖所述取光光栅。
- 根据权利要求1所述的显示面板,其中一个所述液晶光栅周期对应设置有1-6个所述第一电极。
- 根据权利要求1所述的显示面板,其中所述液晶层包括向列相液晶。
- 根据权利要求1所述的显示面板,其中所述液晶层的厚度的范围是0.1微米至10微米。
- 根据权利要求1所述的显示面板,其中所述背光模组包括位于所述导光板的入光面的单色光源,其配置成发射待经由所述入光面耦 入所述导光板的光。
- 根据权利要求1所述的显示面板,还包括介于所述背光模组和所述衍射元件之间的平坦层。
- 一种显示设备,包括如权利要求1-16中任一项所述的显示面板。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16/645,515 US11106074B2 (en) | 2018-08-08 | 2019-08-08 | Display panel and display device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201810897823.7A CN109031757A (zh) | 2018-08-08 | 2018-08-08 | 显示装置及电子设备 |
CN201810897823.7 | 2018-08-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2020030021A1 true WO2020030021A1 (zh) | 2020-02-13 |
Family
ID=64632228
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2019/099701 WO2020030021A1 (zh) | 2018-08-08 | 2019-08-08 | 显示面板及显示设备 |
Country Status (3)
Country | Link |
---|---|
US (1) | US11106074B2 (zh) |
CN (1) | CN109031757A (zh) |
WO (1) | WO2020030021A1 (zh) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109031757A (zh) * | 2018-08-08 | 2018-12-18 | 京东方科技集团股份有限公司 | 显示装置及电子设备 |
JP2020106711A (ja) * | 2018-12-28 | 2020-07-09 | 株式会社ジャパンディスプレイ | 表示装置、及び、表示装置を組み込んだ電子機器 |
CN110244482B (zh) * | 2019-05-21 | 2022-07-19 | 华为技术有限公司 | 一种显示组件、显示屏和电子设备 |
WO2020237430A1 (en) * | 2019-05-24 | 2020-12-03 | Boe Technology Group Co., Ltd. | Display panel, fabricating method thereof, and display apparatus |
CN110471210B (zh) * | 2019-08-22 | 2022-06-10 | 京东方科技集团股份有限公司 | 彩膜基板、显示面板及显示装置 |
CN110854296B (zh) * | 2019-11-22 | 2022-07-12 | Oppo广东移动通信有限公司 | 显示模组和电子装置 |
CN111443510B (zh) * | 2020-05-28 | 2022-06-17 | 厦门天马微电子有限公司 | 一种显示面板和显示装置 |
CN112712754B (zh) * | 2020-12-31 | 2022-08-19 | 联想(北京)有限公司 | 显示装置以及电子设备 |
JP2023111748A (ja) * | 2022-01-31 | 2023-08-10 | 豊田合成株式会社 | ステアリングホイール |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN203688918U (zh) * | 2013-12-17 | 2014-07-02 | 京东方科技集团股份有限公司 | 立体显示装置 |
CN105589256A (zh) * | 2016-03-11 | 2016-05-18 | 京东方科技集团股份有限公司 | 显示装置 |
US20160266465A1 (en) * | 2015-03-12 | 2016-09-15 | Omnitek Partners Llc | Scanning Pattern Projection Methods and Devices |
CN107367883A (zh) * | 2017-09-15 | 2017-11-21 | 京东方科技集团股份有限公司 | 液晶光栅、显示面板及显示装置 |
CN107450211A (zh) * | 2017-09-29 | 2017-12-08 | 京东方科技集团股份有限公司 | 灰阶控制结构及其方法、液晶显示面板、显示装置 |
CN107632448A (zh) * | 2017-09-29 | 2018-01-26 | 京东方科技集团股份有限公司 | 一种显示面板 |
CN108051961A (zh) * | 2018-01-02 | 2018-05-18 | 京东方科技集团股份有限公司 | 一种液晶显示面板及其显示方法和液晶显示装置 |
CN109031757A (zh) * | 2018-08-08 | 2018-12-18 | 京东方科技集团股份有限公司 | 显示装置及电子设备 |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6798464B2 (en) * | 2001-05-11 | 2004-09-28 | International Business Machines Corporation | Liquid crystal display |
JPWO2008001636A1 (ja) | 2006-06-26 | 2009-11-26 | 旭硝子株式会社 | レーザ光用光学部品 |
US10684489B2 (en) * | 2009-06-23 | 2020-06-16 | Seereal Technologies S.A. | Light modulation device for a display for representing two- and/or three-dimensional image content |
US20150248031A1 (en) * | 2012-08-28 | 2015-09-03 | Sharp Kabushiki Kaisha | Light deflection device and method for driving light deflection element |
CN105074322A (zh) * | 2013-03-13 | 2015-11-18 | 惠普发展公司,有限责任合伙企业 | 具有准直反射器的背光源 |
CN103576399B (zh) * | 2013-09-26 | 2016-06-01 | 西安空间无线电技术研究所 | 一种液晶光学相控阵天线实现方法 |
US10171798B2 (en) * | 2014-02-14 | 2019-01-01 | Nlt Technologies, Ltd. | Liquid crystal lenticular lens element, driving method therefor, stereoscopic display device, and terminal device |
CN106959520B (zh) | 2016-01-08 | 2019-10-29 | 京东方科技集团股份有限公司 | 背光模组、显示装置及其驱动方法 |
CN105589269B (zh) * | 2016-03-18 | 2018-12-21 | 京东方科技集团股份有限公司 | 显示面板和显示装置 |
CN106154657B (zh) * | 2016-09-12 | 2023-09-01 | 合肥鑫晟光电科技有限公司 | 一种3d显示装置及其制备方法 |
US10390008B2 (en) * | 2017-01-10 | 2019-08-20 | Sharp Kabushiki Kaisha | Dual-pitch parallax barrier |
CN106647093A (zh) | 2017-03-02 | 2017-05-10 | 京东方科技集团股份有限公司 | 一种液晶显示面板、显示装置及其显示方法 |
CN107238974B (zh) * | 2017-07-24 | 2021-03-02 | 京东方科技集团股份有限公司 | 一种背光源及液晶显示模组 |
CA3084793C (en) * | 2017-12-18 | 2022-08-30 | Leia Inc. | Mode-switchable backlight, display, and method |
US10750145B1 (en) * | 2018-05-24 | 2020-08-18 | Facebook Technologies, Llc | Variable-pitch liquid crystal diffraction grating |
-
2018
- 2018-08-08 CN CN201810897823.7A patent/CN109031757A/zh active Pending
-
2019
- 2019-08-08 WO PCT/CN2019/099701 patent/WO2020030021A1/zh active Application Filing
- 2019-08-08 US US16/645,515 patent/US11106074B2/en active Active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN203688918U (zh) * | 2013-12-17 | 2014-07-02 | 京东方科技集团股份有限公司 | 立体显示装置 |
US20160266465A1 (en) * | 2015-03-12 | 2016-09-15 | Omnitek Partners Llc | Scanning Pattern Projection Methods and Devices |
CN105589256A (zh) * | 2016-03-11 | 2016-05-18 | 京东方科技集团股份有限公司 | 显示装置 |
CN107367883A (zh) * | 2017-09-15 | 2017-11-21 | 京东方科技集团股份有限公司 | 液晶光栅、显示面板及显示装置 |
CN107450211A (zh) * | 2017-09-29 | 2017-12-08 | 京东方科技集团股份有限公司 | 灰阶控制结构及其方法、液晶显示面板、显示装置 |
CN107632448A (zh) * | 2017-09-29 | 2018-01-26 | 京东方科技集团股份有限公司 | 一种显示面板 |
CN108051961A (zh) * | 2018-01-02 | 2018-05-18 | 京东方科技集团股份有限公司 | 一种液晶显示面板及其显示方法和液晶显示装置 |
CN109031757A (zh) * | 2018-08-08 | 2018-12-18 | 京东方科技集团股份有限公司 | 显示装置及电子设备 |
Also Published As
Publication number | Publication date |
---|---|
US11106074B2 (en) | 2021-08-31 |
CN109031757A (zh) | 2018-12-18 |
US20200278576A1 (en) | 2020-09-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2020030021A1 (zh) | 显示面板及显示设备 | |
US20200183202A1 (en) | Liquid crystal display panel, liquid crystal display device and display method thereof | |
US10663641B2 (en) | Display panel and display device | |
US11126022B2 (en) | Display device and display method thereof | |
US10831053B2 (en) | Display panel and display device | |
CN109239965B (zh) | 一种显示器件及其控制方法 | |
US10678086B2 (en) | Display panel, display device, and driving method | |
US10976595B2 (en) | Optical substrate and display device | |
US20210072593A1 (en) | Collimation backlight source, display device and driving method thereof | |
US10705282B2 (en) | Backlight module comprising a plurality of light extraction gratings arranged in an array on a light emission surface of a light guide plate and liquid crystal display using the same | |
CN108572482B (zh) | 一种背光模组、显示装置及其驱动方法 | |
WO2020007181A1 (zh) | 显示面板及显示装置 | |
US10663639B2 (en) | Display device | |
CN108333835B (zh) | 侧入式背光模组、显示装置 | |
CN106292049A (zh) | 显示面板和显示装置 | |
US20190129239A1 (en) | Display panel, display device and display method | |
CN108562965A (zh) | 背光模组及显示装置 | |
WO2021018219A1 (zh) | 显示面板和显示装置 | |
WO2019210785A1 (zh) | 液晶显示装置以及显示方法 | |
US20180231792A1 (en) | Display Device | |
CN106200107B (zh) | 一种显示基板、显示面板及显示装置 | |
US10816846B2 (en) | Display device, display panel, color filter substrate and color filter | |
WO2019153791A1 (zh) | 像素结构、显示面板、显示装置及显示方法 | |
CN108227285B (zh) | 一种显示装置 | |
US10545366B2 (en) | Optical modulator including multiple modulation units, backlight module and display device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 19847718 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 19847718 Country of ref document: EP Kind code of ref document: A1 |
|
32PN | Ep: public notification in the ep bulletin as address of the adressee cannot be established |
Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 15.10.2021) |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 19847718 Country of ref document: EP Kind code of ref document: A1 |