CN108227252B - Display system - Google Patents
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- CN108227252B CN108227252B CN201810070167.3A CN201810070167A CN108227252B CN 108227252 B CN108227252 B CN 108227252B CN 201810070167 A CN201810070167 A CN 201810070167A CN 108227252 B CN108227252 B CN 108227252B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/1313—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 specially adapted for a particular application
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133526—Lenses, e.g. microlenses or Fresnel lenses
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
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- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The invention provides a display system, relates to the technical field of display, and aims to improve Moire patterns in a display image of a display device and improve the display effect. The display system comprises a display device, and further comprises: the lens unit is arranged on the display side of the display device, and an image displayed by the display device forms a spatial frequency spectrum on a frequency spectrum surface on the side, far away from the display device, of the lens unit; a filtering unit disposed on the spectrum plane; the filtering unit is configured to block a preset spatial frequency component in the spatial frequency spectrum, the preset spatial frequency component corresponding to a moire in the image.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display system.
Background
In the prior art, as the resolution of display products is continuously improved, the size of a single pixel is gradually reduced.
When a display product displays a picture, Moire (Moire) is often generated due to interference between a high-frequency picture and fringes of pixel arrangement or Moire is generated due to mutual overlapping of a prism sheet and a pixel unit in a backlight module, which affects the viewing experience of a viewer.
Disclosure of Invention
In view of the above, embodiments of the present invention provide a display system, which can improve moire patterns in a display image of a display device, thereby improving a display effect.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
the embodiment of the invention provides a display system, which comprises a display device and further comprises: the lens unit is arranged on the display side of the display device, and an image displayed by the display device forms a spatial frequency spectrum on a frequency spectrum surface on the side, far away from the display device, of the lens unit; a filtering unit disposed on the spectrum plane; the filtering unit is configured to block a preset spatial frequency component in the spatial frequency spectrum, the preset spatial frequency component corresponding to a moire in the image.
Optionally, the filtering unit includes: a black-and-white liquid crystal display panel; the black and white liquid crystal display panel includes: a plurality of first pixel units arranged in an array; the display system further includes: a control unit; the control unit is configured to control the first pixel units in a preset area to be light-tight so as to block the preset spatial frequency components; meanwhile, the control unit is further configured to control the first pixel units in the remaining regions except the preset region to transmit light so as to pass the remaining spatial frequency components except the preset spatial frequency component in the spatial frequency spectrum.
Optionally, the control unit includes: an identification module configured to identify the moire; the calculation module is configured to calculate a shielding pattern to be displayed on the black-and-white liquid crystal display panel through the identified moire fringes; the shielding pattern includes: a light-opaque portion and a light-transmissive portion; the light-tight part is configured to block the preset spatial frequency component, and the light-transmitting part is configured to allow the rest spatial frequency components except the preset spatial frequency component in the spatial frequency spectrum to pass through; and the driving module is configured to drive the first pixel units in the preset area corresponding to the light-tight part on the black-and-white liquid crystal display panel to be light-tight, and simultaneously drive the first pixel units in the other areas except the preset area on the black-and-white liquid crystal display panel to be light-tight.
Optionally, the display device includes: a plurality of second pixel units arranged in an array; the moire pattern is generated by a stripe pattern displayed by the plurality of second pixel units arranged in the array.
Optionally, the black-and-white liquid crystal display panel is a normally white black-and-white liquid crystal display panel.
Optionally, the display device includes: the backlight module comprises a first liquid crystal display panel and a backlight source module; the first liquid crystal display panel includes: a plurality of third pixel units arranged in an array; the backlight module includes: a first prism sheet; the Moire patterns are generated by the mutual overlapping of the prism stripes of the third pixel units and the first prism sheet; the filtering unit includes: a shielding diaphragm; the shielding diaphragm includes: a light-opaque portion and a light-transmissive portion; wherein the opaque portion is configured to block the preset spatial frequency component, and the transparent portion is configured to pass the remaining spatial frequency components of the spatial frequency spectrum except the preset spatial frequency component.
Optionally, the opaque portion is formed by an opaque region of the transparent film after exposure, and the transparent portion is formed by an unexposed transparent region of the transparent film.
Optionally, the display system further includes: the second prism sheet is attached to the display side of the display device and configured to improve the parallelism of emergent light of the display device; the moire is generated by overlapping the third pixel unit, the prism stripes of the first prism sheet, and the prism stripes of the second prism sheet.
Optionally, the lens unit includes: a gel lens; the gel lens includes: the transparent gel comprises a transparent membrane, an electrode and transparent gel, wherein the electrode and the transparent gel are arranged on the surface of the transparent membrane; the electrodes and the transparent gel are disposed toward the display device; the electrodes are configured to form an electric field to control a radius of curvature of the transparent gel surface.
Optionally, the display system further includes: a first support member configured to fix the lens unit facing the display device at a preset distance; and/or a second support member configured to fix the filter unit on the spectral surface on a side of the lens unit away from the display device.
Based on this, according to the display system provided by the embodiment of the present invention, the lens unit and the filtering unit are sequentially disposed on the display side of the display device, and the preset spatial frequency component corresponding to the moire pattern in the spatial frequency spectrum formed by the lens unit is filtered out from the image displayed by the display device, so that an image without moire patterns can be obtained on the image plane, the display effect is improved, and the viewing quality of a viewer is improved. The display system is suitable for display occasions with high requirements on high-frequency pictures and removal of moire fringes.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic configuration diagram of a display system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of Abbe-Baud spatial filtering experiment principle;
FIG. 3 is a schematic diagram showing a comparison of pictures before and after grid filtering;
FIG. 4(a) is a photograph drawing one of an image displayed on a prior art display screen;
fig. 4(b) is a photograph view ii of an image displayed on a display screen in the related art.
Reference numerals:
10-a display device; 20-a lens unit; 30-a filtering unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is to be noted that, unless otherwise defined, all terms (including technical and scientific terms) used in the embodiments of the present invention have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
For example, the terms "first," "second," and the like as used in the description and in the claims of the present patent application do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. Terms of orientation or positional relationship indicated by "upper/upper", "lower/lower", "row/row direction", and "column/column direction" and the like are terms based on the orientation or positional relationship shown in the drawings, and are only for the purpose of simplifying the description of the technical solution of the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, cannot be construed as limiting the present invention.
As shown in fig. 1, an embodiment of the present invention provides a display system, which includes a display device 10; a lens unit 20 disposed on the display side of the display device 10, wherein the image displayed by the display device 10 forms a spatial frequency spectrum on a frequency spectrum plane (indicated by a dotted line in the figure) on the side of the lens unit 20 far away from the display device 10; a filtering unit 30 disposed on the spectrum plane; the filtering unit 30 is configured to block a preset spatial frequency component in the spatial frequency spectrum, which corresponds to the moire in the image.
The display system provided by the embodiment of the invention specifically utilizes the spatial filtering principle to perform information processing on the image displayed by the display device, namely, the moire pattern in the image is filtered, so that an observer can see the image without the moire pattern on the image plane (marked as AA in fig. 1) close to one side of the filtering unit, and the watching quality of the observer is improved.
The principle of spatial filtering is specifically as follows:
coherent light irradiates an object to generate diffracted light, a Fraunhofer diffraction pattern is formed on a frequency spectrum surface of the lens after passing through the lens, namely, a frequency spectrum is formed, and the step of diffraction plays a role in frequency division. These spectra correspond to new sources of sub-waves, the spherical waves emitted by them interfering on the image plane to form an image of the object, this step of interference acting as a "synthesis". The first step of the imaging process is from an object plane to a frequency spectrum plane, and Fourier transform is performed correspondingly; the second step of the imaging process is from the frequency spectrum plane to the image plane, which corresponds to an inverse fourier transform.
The spectral plane refers to a plane passing through a second focal point of the lens (i.e., a focal point far away from the light source, and the opposite focal point is the first focal point) and perpendicular to the main optical axis of the system, and is also referred to as a second focal plane, or a back focal plane, or a fourier plane.
In the first step of the imaging process, the light is diffracted by the object and then decomposed into spatial frequency spectrums of various frequencies on the spectrum plane, which are actually "classified" by spatial frequency of the spatial structure information included in the object. If a filter (such as an absorption plate or a phase shift plate) is disposed on the spectrum plane, some spatial frequency components can be removed (or selectively passed), so as to change the optical field distribution on the spectrum plane, and change the imaging of the object, which is the spatial filtering.
As shown in fig. 2, a black and white grating simulation object plane is formed by using a filament mesh for the spatial filtering experiment based on the spatial filtering separation. A plurality of parallel coherent light beams can form a grid pattern after passing through a black-white grating, a space frequency spectrum can be formed on a frequency spectrum surface of a lens after passing through the lens, if a filter placed on the frequency spectrum surface is an adjustable diaphragm with controllable size, the space frequency components corresponding to the grid pattern in the space frequency spectrum can be filtered by adjusting the size of a hole of the diaphragm, namely, the small hole can only allow zero-frequency components to pass through, and high-frequency components are shielded, so that a white picture without the grating pattern is presented on an image plane.
The effect of the spatial filtering can be further shown in fig. 3, in which the pattern before passing through the lens is (a) a grid and a bird pattern covered by the grid, and the grid part is removed after filtering by the adjustable diaphragm, so that the viewer can only see the bird pattern as shown in (b) on the image plane, thereby achieving the effect of performing selective information processing on the image.
Based on the principle of the spatial filtering, referring to fig. 1, in the display system according to the embodiment of the present invention, a lens unit 20 is disposed on a display side of a display device 10, light (i.e., a displayed image) emitted from the display device is focused by the lens unit 20, and a spatial frequency spectrum of the image is formed, and a filter unit 30 disposed on a spectral plane of the lens unit 20 filters a predetermined spatial frequency component corresponding to moire in the image in the spatial frequency spectrum, so that an image without moire on an image plane AA can be obtained, and a display effect is improved.
The display device may be a liquid crystal display device or an organic electroluminescent display device, and may specifically be a product or a component having any display function, such as a display, a television, a mobile phone, a tablet computer, a digital photo frame, a navigator, and the like.
Based on this, according to the display system provided by the embodiment of the present invention, the lens unit and the filtering unit are sequentially disposed on the display side of the display device, and the preset spatial frequency component corresponding to the moire pattern in the spatial frequency spectrum formed by the lens unit is filtered out from the image displayed by the display device, so that an image without moire patterns can be obtained on the image plane, the display effect is improved, and the viewing quality of a viewer is improved. The display system is suitable for display occasions with high requirements on high-frequency pictures and removal of moire fringes
On the basis, the display system provided in the embodiment of the present invention may further include: a first support member configured to fix the lens unit facing the display device at a preset distance.
Here, the first support member may be specifically any member capable of fixing the lens unit, such as a frame, a bracket, or the like, and fixing the lens unit facing the display device by a predetermined distance.
The preset distance is such that light emitted from the display device forms a corresponding spatial frequency spectrum on a frequency spectrum surface of the lens unit on the side far away from the display device. The specific distance can be flexibly set according to optical parameters such as the area of the display device and the focal length of the lens unit, which is not limited in the embodiment of the invention.
Further, the display system provided in the embodiment of the present invention may further include: and a second support member configured to fix the filter unit on a spectral plane on a side of the lens unit away from the display device.
Here, the second support member may be specifically any member capable of fixing the filter unit, such as a frame, a bracket, or the like.
The first support member and the second support member may be two independent fixing members, or may be two parts of one fixing member.
Further, in consideration of the defects of high processing difficulty, easy breakage and the like of the conventional glass lens, the embodiment of the present invention is further preferable, and the lens unit may specifically adopt a non-glass lens.
Illustratively, the lens unit may be a gel lens. The gel lens specifically includes: the transparent film, the electrode arranged on the surface of the transparent film and the transparent gel; the electrodes and the transparent gel are disposed toward the display device; the electrodes are configured to form an electric field to control a radius of curvature of the transparent gel surface.
Wherein, the transparent gel is an arc shape along the section perpendicular to the transparent film as the substrate, and the curvature radius is used for describing the degree of the change of the curve of the arc shape. The radius of curvature of the surface of the transparent gel is controlled by a voltage, which adjusts the convex shape of the transparent gel, thereby controlling the focal length of the formed gel lens.
The transparent gel may be disposed on the transparent film (for example, a polymer material) by an adsorption manner, and the pattern of the electrode for forming the electric field may be a gel lens in the prior art, which is not limited in the embodiment of the present invention.
Two specific embodiments are provided below for describing in detail the above-described display system for removing dynamic moire generated by the high frequency picture and removing moire generated by the prism sheet and the pixel unit overlapping each other.
Example 1
The moire generated in the high frequency screen is generally in a water wave shape as shown in fig. 4(a) or fig. 4 (b). For moire generated in a high frequency picture in an image displayed by the display device, since the moire is related to a specific image displayed by the display device, namely, dynamic moire, the moire in the image can be removed by arranging a black and white liquid crystal display panel on a frequency spectrum surface of the lens unit to be used as a grid display to perform selective filtering. The concrete structure is as follows:
the filtering unit includes: a black-and-white liquid crystal display panel, the black-and-white liquid crystal display panel comprising: a plurality of first pixel units arranged in an array; the above display system further includes: a control unit; the control unit is configured to control the first pixel units in the preset area to be light-tight so as to block the preset spatial frequency components; meanwhile, the control unit is also configured to control the first pixel units in the rest areas except the preset area to transmit light so as to pass the rest spatial frequency components except the preset spatial frequency components in the spatial frequency spectrum.
The display device includes: a plurality of second pixel units arranged in an array; the dynamic Moire pattern is generated by a stripe pattern displayed by a plurality of second pixel units arranged in an array.
Here, the black-and-white liquid crystal display panel, i.e. the conventional monochrome liquid crystal display panel, when the light emitted from the backlight is white, the display mode is usually a white character on a black matrix or a black character on a white matrix. The specific structure can be adopted in the prior art, and details of embodiment 1 of the present invention are not repeated.
The control unit may specifically include: an identification module configured to identify moir é patterns generated by the high frequency portion pattern of the display image; the calculation module is configured to calculate a corresponding shielding pattern through the identified moire fringes, wherein the shielding pattern comprises a light-tight part and a light-transmitting part; the driving module is configured to drive the first pixel units in the preset area of the opaque part of the black-and-white liquid crystal display panel corresponding to the shielding pattern to be formed to be opaque so as to block the preset spatial frequency components; meanwhile, the first pixel units in the remaining regions (i.e., corresponding to the light-transmitting portions to be formed) other than the preset region are driven to transmit light so as to pass the remaining spatial frequency components in the spatial frequency spectrum other than the preset spatial frequency components.
Therefore, the shielding pattern is displayed on the black-and-white liquid crystal display panel, and the aim of improving the Moire pattern of the high-frequency part of the picture is fulfilled.
The black-and-white liquid crystal display panel may further be a normally white type black-and-white liquid crystal display panel. The normally white type refers to a liquid crystal cell which is in a bright state (white) when not energized and in a dark state with a crossed polarizer when energized, namely, a black character with white background. A TN (Twist Nematic) liquid crystal display panel is usually in a normally white mode, and since most of regions formed on a spectrum surface of an image displayed by the display device after passing through the lens unit 20 are light-transmitting regions and a small part of the regions are high-frequency spectrum points corresponding to moire patterns, the black and white liquid crystal display panel in the normally white mode can reduce power consumption.
Example 2
The moire fringes produced by the mutual overlapping of the prism sheet and the pixel units are due to the fact that the pixel units arranged in an array mode in the display product can be seen as a plurality of fringes with small intervals on the whole, and for the display product with the backlight module, the light and shade difference of the light emitting surface caused by the peak-shaped structure of the prism sheet in the backlight module can be seen as fine fringes. The backlight sequentially transmitted through the prism sheet and the pixel unit generates interference where the two kinds of fringes overlap with each other, so that moire occurs when the display product displays an image.
Namely, the display device specifically includes: the backlight module comprises a first liquid crystal display panel and a backlight source module; the first liquid crystal display panel includes: a plurality of third pixel units arranged in an array; the backlight module includes: a first prism sheet; moire fringes are generated by mutually overlapping the prism fringes of the third pixel unit and the first prism sheet; the filtering unit specifically includes: a shielding diaphragm; the shielding diaphragm includes: a light-transmitting portion and a light-blocking portion; the light-tight part is configured to block the preset spatial frequency component, and the light-transmitting part is configured to allow the rest spatial frequency components except the preset spatial frequency component in the spatial frequency spectrum to pass through.
Wherein, the opaque part is formed by the opaque area of the transparent negative after exposure, and the light transmission part is formed by the unexposed light transmission area of the transparent negative.
Here, moire generated by overlapping the prism sheet in the backlight module and the grid structure of the pixel unit may be regarded as a black-and-white grating formed by a fine mesh in fig. 2, and the frequency spectrum formed by the fixed mesh on the frequency spectrum plane is fixed.
Therefore, the display device can display pure white pictures (namely, images with only white color and moire patterns) firstly, namely, a black negative film is placed on the frequency spectrum surface of the side of the lens unit far away from the display device by using the light emitted by the display device as an exposure light source, and the black negative film is exposed once, so that the generated frequency spectrum graph with the fixed moire patterns is recorded on the black negative film as a grid pattern. Since the black film is opaque before exposure, the exposed areas form clear areas, thereby forming clear areas corresponding to the moir é patterns and opaque areas corresponding to the white background on the black film.
In order to actually improve the display image quality of the display device, it is necessary to pass the low frequency components corresponding to the white background and filter the high frequency components corresponding to the moire fringes. Therefore, it is necessary to simulate the grid points generated by the grid on the spectrum plane to be exposed on the transparent negative again according to the principle of the spatial filtering experiment.
Since the transparent negative is transparent before exposure and the exposed area forms a non-transparent area, a shading pattern opposite to the transparent area of the black negative can be formed after the transparent negative is exposed through the black negative after the first exposure. That is, the opaque part formed on the transparent negative after exposure corresponds to the high frequency spectrum point of the moire pattern, and the unexposed transparent part on the transparent negative corresponds to the low frequency component of other areas in the image.
After the transparent negative film with the opaque region is placed on a frequency spectrum plane, diffraction spots generated by the Moire pattern grids are filtered and shielded by the opaque part on the transparent negative film, and at the moment, an image displayed by a display device serving as a background is changed, and the Moire pattern grids are shielded, so that the effect of improving fixed Moire patterns generated by mutual overlapping of the prism sheet and the pixel units in the displayed image is achieved.
On the basis, a second prism sheet can be attached to the display side of the display device to improve the parallelism of emergent light of the display device.
The second prism sheet is added, so that the fixed Moire generated after the image displayed by the display device passes through the second prism sheet is generated by mutually overlapping the third pixel unit arranged in the first liquid crystal display panel array of the display device, the prism stripes of the first prism sheet in the backlight module and the added prism stripes of the second prism sheet. The shielding diaphragm used for shielding the preset spatial frequency component corresponding to the Moire pattern only needs to be additionally provided with one diaphragm without additionally arranging a plurality of diaphragms.
Here, after the second prism sheet is added, the position of light emitted from the display device is changed, so that the distance between the subsequently arranged lens unit and the display device, the distance between the filter unit and the lens unit, and the distance between the image plane and the lens unit should be adjusted accordingly, and the specific adjustment principle meets the principle of abbe-baud spatial filtering, which is not specifically limited in embodiment 2 of the present invention.
Of course, for the embodiment 2 for improving the fixed moire generated by the mutual overlapping of the prism sheet and the pixel unit, the method of the embodiment 1 can be also adopted, and the shielding pattern corresponding to the moire is obtained first, and then the shielding is displayed on the black-and-white liquid crystal display panel, so as to achieve the purpose of improving the fixed moire.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A display system comprising a display device, characterized in that the display system further comprises:
the lens unit is arranged on the display side of the display device, and an image displayed by the display device forms a spatial frequency spectrum on a frequency spectrum surface on the side, far away from the display device, of the lens unit;
a filtering unit disposed on the spectrum plane; the filtering unit is configured to block preset spatial frequency components in the spatial frequency spectrum, the preset spatial frequency components corresponding to Moire patterns in the image;
the filtering unit includes: black and white liquid crystal display panel or shielding film; the black and white liquid crystal display panel includes: a plurality of first pixel units arranged in an array; the shielding diaphragm includes: opaque portions and transparent portions.
2. The display system according to claim 1,
in the case where the filter unit includes the black and white liquid crystal display panel,
the display system further includes: a control unit; the control unit is configured to control the first pixel units in a preset area to be light-tight so as to block the preset spatial frequency components; meanwhile, the control unit is further configured to control the first pixel units in the remaining regions except the preset region to transmit light so as to pass the remaining spatial frequency components except the preset spatial frequency component in the spatial frequency spectrum.
3. The display system according to claim 2, wherein the control unit comprises:
an identification module configured to identify the moire;
the calculation module is configured to calculate a shielding pattern to be displayed on the black-and-white liquid crystal display panel through the identified moire fringes; the shielding pattern includes: a light-opaque portion and a light-transmissive portion; the light-tight part is configured to block the preset spatial frequency component, and the light-transmitting part is configured to allow the rest spatial frequency components except the preset spatial frequency component in the spatial frequency spectrum to pass through;
and the driving module is configured to drive the first pixel units in the preset area corresponding to the light-tight part on the black-and-white liquid crystal display panel to be light-tight, and simultaneously drive the first pixel units in the other areas except the preset area on the black-and-white liquid crystal display panel to be light-tight.
4. The display system according to claim 2, wherein the display device comprises: a plurality of second pixel units arranged in an array; the moire pattern is generated by a stripe pattern displayed by the plurality of second pixel units arranged in the array.
5. The display system according to claim 2, wherein the black-and-white liquid crystal display panel is a normally white type black-and-white liquid crystal display panel.
6. The display system according to claim 1,
in case the filtering unit comprises the shielding diaphragm,
the display device includes: the backlight module comprises a first liquid crystal display panel and a backlight source module; the first liquid crystal display panel includes: a plurality of third pixel units arranged in an array; the backlight module includes: a first prism sheet; the Moire patterns are generated by the mutual overlapping of the prism stripes of the third pixel units and the first prism sheet;
wherein the opaque portion is configured to block the preset spatial frequency component, and the transparent portion is configured to pass the remaining spatial frequency components of the spatial frequency spectrum except the preset spatial frequency component.
7. The display system of claim 6 wherein the opaque portion comprises an opaque area of the transparent substrate after exposure and the transparent portion comprises an unexposed transparent area of the transparent substrate.
8. The display system of claim 6, further comprising:
the second prism sheet is attached to the display side of the display device and configured to improve the parallelism of emergent light of the display device;
the moire is generated by overlapping the third pixel unit, the prism stripes of the first prism sheet, and the prism stripes of the second prism sheet.
9. The display system of claim 1, wherein the lens unit comprises: a gel lens; the gel lens includes: the transparent gel comprises a transparent membrane, an electrode and transparent gel, wherein the electrode and the transparent gel are arranged on the surface of the transparent membrane; the electrodes and the transparent gel are disposed toward the display device; the electrodes are configured to form an electric field to control a radius of curvature of the transparent gel surface.
10. The display system of claim 1, further comprising: a first support member configured to fix the lens unit facing the display device at a preset distance; and/or a second support member configured to fix the filter unit on the spectral surface on a side of the lens unit away from the display device.
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| KR101200769B1 (en) * | 2011-01-13 | 2012-11-13 | 삼성코닝정밀소재 주식회사 | Optical film for reducing color shift and lcd device having the same |
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| JPH10312033A (en) * | 1997-05-13 | 1998-11-24 | Mitsubishi Electric Corp | Display device |
| CN102608767A (en) * | 2012-03-16 | 2012-07-25 | 深圳超多维光电子有限公司 | Autostereoscopic display device and corresponding terminal equipment |
| CN103934600A (en) * | 2014-04-14 | 2014-07-23 | 北京工业大学 | Weld zone machine vision device with self-adaptive liquid crystal filter screen |
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