CN112946912B - Naked eye 3D display device capable of achieving lossless super-definition resolution and simultaneous watching of multiple people - Google Patents
Naked eye 3D display device capable of achieving lossless super-definition resolution and simultaneous watching of multiple people Download PDFInfo
- Publication number
- CN112946912B CN112946912B CN202110200345.1A CN202110200345A CN112946912B CN 112946912 B CN112946912 B CN 112946912B CN 202110200345 A CN202110200345 A CN 202110200345A CN 112946912 B CN112946912 B CN 112946912B
- Authority
- CN
- China
- Prior art keywords
- backlight
- depth
- different
- eye
- viewer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
- G02B30/33—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving directional light or back-light sources
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Abstract
The invention relates to a large-depth naked eye 3D display device capable of achieving lossless super-definition resolution and simultaneous watching of multiple people. The device is based on the U-shaped backlight module, expands the transverse viewing range, and realizes simultaneous viewing, depth expansion and low flicker of multiple televisions. When the display module displays the right-eye image, the LEDs corresponding to the two eyes are synchronously turned on, and under the action of the lenses, the 3D image is seen by the two persons at the same time; the method for determining the mapping between the view point and the backlight lamp comprises the steps of simulating photon drop points of each row of LEDs at different depth view points, and screening corresponding LED numbers of different view points; the depth is expanded in a mode of switching LED combinations with different depths; the determination of the number of the view point lights comprises taking LEDs corresponding to the view point as a master light, and continuously turning on a certain number of LEDs left and right to realize the high uniform illumination of a single eye; in addition, the method for reducing static flicker is realized by taking the pupil recognition precision of the camera as a high-density visual area of step length and adjusting the visual area line in real time.
Description
Technical Field
The invention relates to the technical field of 3D display, in particular to a naked eye 3D display device with multiple people simultaneously watching, dense viewpoints, a large visual area and lossless super-definition resolution.
Background
Naked eye 3D display technology is widely applied to the fields of education, business, medical treatment and the like. Currently, the naked eye 3D technology is mainly based on the grating and cylindrical lens technology, but the technology provides better 3D visual experience for human beings, and meanwhile, partial defects such as resolution loss, higher crosstalk, smaller output screen and the like still exist, and the main reason is that the technical light source is also an image source. With the popularization of 4K and 8K liquid crystal panels, the resolution loss problem can meet the requirements of human beings, but the calibration of the grating or the column lens and the pixel level of the LCD panel is still difficult to mass production and popularization, and the problem of higher crosstalk is not solved yet. The backlight naked eye 3D technology perfectly solves the problem of resolution loss, and the resolution loss is realized in a mode that resolution is not lost by adopting a technology that an image source and a light source are independent. The method is compatible with various 3D movies and 3D games in the market, and avoids the reverse vision phenomenon of the traditional 3D technology. The light source is mainly composed of a directional backlight source, a lens array, an image display layer, a linear diffusion sheet and other optical devices. Among them, the image display device is mainly a liquid crystal panel with a refresh rate of 120HZ or 240HZ. When the left eye image is refreshed, the corresponding LED of the left eye is turned on; while the right eye image is refreshed, the right eye corresponding LED is on, and no screen flicker occurs because of its single eye refresh rate >60 HZ. In addition, it does not require a pixel-level lens to match the LCD, and is easy to process. However, it still has some drawbacks such as limited 3D images, i.e. limited longitudinal viewing distance, which experience high display quality due to only one optimal viewing distance for the focal length of the lens, and in addition, problems of viewer number, flickering, corresponding backlight determination of the viewing zone, edge brightness degradation caused by the wide viewing zone, and contradiction between crosstalk values and uniformity are also of great concern in this technology.
At present, the problem of limited depth is partially solved by changing an ideal backlight curve of an LED, but the processing difficulty is high, mass production cannot be realized, and the experience freedom of an experimenter still cannot be met in the view range; the determination of the corresponding backlight parent lamp at each view zone currently includes: back illumination, forward illumination, etc. Reverse illumination: arranging a human eye model lamp column or weak laser beams at the position of an optical area, wherein due to reversible optical paths, narrow light spots can be observed at each group of backlight positions respectively in a darkroom environment, and each group of on lamps corresponding to the model placement position, namely corresponding main lamps or master lamps, can be judged according to the light spots; forward lighting scheme: sequentially opening each backlight unit row, carrying out peak searching calculation according to brightness distribution of a picture by utilizing the cooperation of a camera and a stepping motor platform, identifying the centers of backlight illumination positions of each row under different distances, and recording the spatial distribution of the whole visual area, wherein the two schemes have a common defect, have long time consumption and are difficult to operate; in addition, the edge brightness drop caused by the wide visual area and the brightness difference caused by switching the LED lamps due to the identification error can cause flicker with certain intensity; the problem of excessive crosstalk caused by multi-person viewing can also cause physiological conditions such as dizziness of experimenters.
Disclosure of Invention
The invention aims to provide a naked eye 3D display device with lossless super-definition and simultaneous viewing by multiple persons, so as to realize the function of simultaneously viewing super-definition pictures by multiple persons of directional backlight naked eye 3D display.
Therefore, the invention provides a naked eye 3D display device with lossless super-definition and simultaneous viewing by multiple people, which comprises the following components: the image output module is used for converting the image data into a 3D image with a corresponding format; the backlight module is connected with the display module and comprises a plurality of backlight units; the display module is connected with the image output module synchronously with the backlight unit; when the display module displays a 3D picture corresponding to the left eye of a first viewer, the backlight module starts a backlight unit corresponding to the left eye of the first viewer, and when the display module displays a 3D picture corresponding to the right eye of the first viewer, the backlight module starts a backlight unit corresponding to the right eye of the first viewer; when the display module displays a 3D picture corresponding to the left eye of the second viewer, the backlight module starts a backlight unit corresponding to the left eye of the second viewer, and when the display module displays a 3D picture corresponding to the right eye of the second viewer, the backlight module starts a backlight unit corresponding to the right eye of the second viewer.
Further, if the 3D pictures watched by the first viewer and the second viewer are the same, the refresh rate of the display module is greater than or equal to 120Hz; and if the 3D pictures accepted by the first viewer and the second viewer are different, the refresh rate of the display module is larger than or equal to 240Hz.
Furthermore, the backlight module comprises a plurality of U-shaped backlight units, wherein the backlight units comprise a plurality of LED lamp bars with different lens spacing, and the LED lamp bar combinations in different backlight units can illuminate the whole display range. Furthermore, the expansion of the depth range of the visual area can be realized by turning on the combined lamps of different backlight units so as to turn on the illumination light sources required by the positions of different image points of the lens corresponding to the positions of different object distances.
Further, the backlight combination mapped to the viewpoints one by one is determined as follows:
each row of LED light bars of the simulation backlight module randomly emit photons with a certain angle and quantity, the photons are refracted by the linear Fresnel lens, and the light path or photon falling point positions of the photons are determined at different longitudinal positions and transverse positions away from the display;
screening the LED lamp bar serial numbers of the light spots of different backlight modules, which fall points are closest to the viewpoint positions, at each viewpoint position as a main lamp, wherein the main lamp is an LED lamp bar with the light ray track just falling points at or closer to the viewpoint positions;
and determining the number N of the LED lamp strips which are continuously started, taking the interpupillary distance as the distance between the two main lamps, respectively continuously starting the LED lamp strips of the N1 columns to carry out monocular illumination, and spacing the LED lamp strips with the preset interpupillary distance.
Further, determining the number N of LED light bars that are continuously turned on at different depth positions includes:
setting the continuous turn-on number corresponding to the optimal viewing distance d1 as N1 and the continuous turn-on number at different depth distances di from the display as Ni;
determining the distance between the two main lamps according to the formula N1/ni=di/d 1;
and the density of the LED light bars is m, the distance from the LED light bars to the lens is D1, the distance from the human eyes to the lens is D2, and the number N of the LED light bars which are continuously turned on is determined according to the formula ((N+1). M)/D=d1/D2.
Further, the reducing static and dynamic flicker in the naked eye 3D display includes:
testing the shake quantity or the identification error of human eyes to a tested pixel, and selecting a viewpoint density value according to the physical distance corresponding to the pixel;
determining that a transverse visual area switching condition is reached when the viewpoint density value deviating from the last switching position for the second time exceeds the density of the visual area within the continuously preset frame number, and transversely switching the LED combination;
when the longitudinal visual area is switched, taking the precision of the ranging software as the interval, switching to a backlight combination corresponding to the longitudinal position by using each longitudinal position as a set of backlight combination corresponding to the longitudinal position so as to realize the expansion and continuous switching of the depth.
Further, the backlight unit comprises a plurality of substrates, wherein the substrates are spliced into a U shape, and the central symmetry point of the U shape of the backlight unit is distributed on the lens toOn an arc of radius, where v is apparentShowing the best viewing position of the device, wherein the lenses are Fresnel lenses, f is the focal length of the Fresnel lenses, and the LED light bars of adjacent backlight units are at least partially overlapped to realize the continuity between the backlight units.
Further, the backlight module comprises an anti-reflection film or an anti-reflection film arranged on the back surface of the substrate; and an anti-reflection film or an anti-reflection film is also arranged between the lens and the display device.
Furthermore, the number of photons collected at different depth positions by randomly emitting photons of each row of LED light bars is taken as a main factor, and the half-width central position of a photon distribution curve is defined as a simulated photon drop point position;
the number of emitted photons of the LED light bar is set to be more than 1000000, and the photons of different positions are simulated and counted through refraction of the linear Fresnel lens.
Further, after determining the number of the LED light bars to be continuously turned on and the number of the interval lights, the method further comprises:
the LED light bars with 1-2 columns of intervals are properly increased according to occasions to reduce crosstalk, or the number of continuous on lights with 1-2 columns is increased or the number of the interval lights with 1-2 columns is reduced to increase uniformity.
Further, when the viewing area switching condition is reached, taking the preset precision as a distance, each longitudinal position corresponds to a set of backlight combinations corresponding to the longitudinal position, and switching to the backlight combination corresponding to the longitudinal position to realize the expansion and continuous switching of the depth comprises:
taking the depth measurement precision of the double cameras as a reference, taking the depth measurement precision as a step length, simulating light spot falling points at different longitudinal positions, and screening a set of LED lamp strip serial number combinations corresponding to the longitudinal positions;
if the LED serial number combination of the different depths d1, d2 and d3 at the same transverse position is unchanged, combining three depths corresponding to d1, d2 and d3 into the same set of LED lamp strip serial number combination so as to reduce stroboscopic effect of the LED lamp strip caused by front-back depth movement;
if the lamp serial numbers are different at the same transverse position in different depth d1, d2 and d3, a set of LED serial number combinations are started at different depth distances, so that the density of a depth visual area is improved, and the continuity of switching of the serial numbers of the depth LED combinations is ensured.
Further, the amount of shake or recognition error of the test human eye on the test pixel includes:
fixing the dummy head model, and starting the human eye tracking program software for a period of time to obtain the pupil position identified by human eye tracking;
and drawing a graph by taking the frame rate of the camera as an abscissa and the pupil position as an ordinate, and determining the jitter amount or the recognition error of human eye tracking according to the graph.
Further, determining that the intensive view region of the naked eye 3D display corresponds to the backlight on combination further includes:
selecting viewpoint positions by taking the precision of pupil identification of a camera as a distance, screening the nearest different backlight module LED sequence combinations of each viewpoint position respectively, and storing the corresponding relation between the viewpoint positions and the LED sequence combinations into a human eye identification software program;
when the human eyes move to the viewpoint position, the LED sequence combination corresponding to the viewpoint position is started to illuminate the human eyes.
Furthermore, the LED light bars of the backlight module are arranged in a continuous staggered manner, so that any one of the visual areas in the visual area space is provided with the LED light bars for illumination.
Compared with the prior art, the lossless super-definition naked eye 3D display device capable of being watched by multiple persons simultaneously converts image data into 3D images in corresponding formats through the image output module, outputs 3D images corresponding to left eyes or right eyes to a first viewer through the display module, outputs 3D images corresponding to left eyes or right eyes to a second viewer, simultaneously starts a backlight unit corresponding to the left eyes or right eyes of the first viewer or the second viewer, and can watch free three-dimensional images without resolution loss simultaneously under the action of lenses without the assistance of additional equipment for single person or multiple persons, and even different experimenters can see free three-dimensional images with different images.
In addition, the naked eye 3D display device with lossless super-definition resolution and simultaneous watching by multiple people provided by the invention further expands the transverse watching range of the naked eye 3D television device by designing a new U-shaped backlight structure. Moreover, the LED lamp strips combined by serial numbers with different distances from the backlight module to the lens are started to adjust the object distance, so that the image distance is changed, and the depth range of the display is further enlarged; the method comprises the steps of determining LED serial numbers required to be started for different depth expansion in a mode of screening light track drop points by simulating light paths of each LED light bar at different longitudinal positions through a Fresnel lens and screening LED serial numbers required to be started for different backlight modules corresponding to different viewpoints; the expansion of the longitudinal viewing distance is based on staggered continuous U-shaped backlight, and continuous switching of a seamless intensive view area is carried out on the longitudinal direction and the transverse direction, so that the continuity of transverse and longitudinal movement experience is ensured; more importantly, LEDs which enter pupils are used as main lamps at different transverse and longitudinal positions, different numbers of LED lamps are continuously turned on to be used as monocular illumination, and meanwhile, different numbers of LED lamps are spaced to be used as dark areas of two eyes, so that high-quality display with high uniformity and low crosstalk at different depths is realized; in addition, according to the precision value of the eye tracking pupil as the selected value of the viewpoint density value,
further, the static and dynamic flicker intensity which is unavoidable when moving horizontally and longitudinally is reduced by the dense visual area and the real-time adjustment visual area. The left and right images of the synchronous display module are synchronously displayed by simultaneously starting the LED combinations of a plurality of viewpoints, and the simultaneous watching of a plurality of people is realized under the cooperation of lenses.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a simulated LED ray trace drop point location.
Fig. 2 is a schematic structural diagram of a backlight module.
Fig. 3 is a schematic diagram of a naked eye 3D display device in which a plurality of people simultaneously watch 3D.
Fig. 4 is a flowchart of screening backlight corresponding to a naked eye 3D viewing area.
Fig. 5a-5b are schematic diagrams of determining the number of lights on.
Fig. 6a-6b are schematic diagrams of achieving high quality longitudinal continuous expansion.
Fig. 7 is a schematic diagram of real-time adjustment of the view line of the intensive view region.
1: a backlight module; 101. 102, 103, 104: four different sets of backlight units; 1011. 1012, 1021, 1022, 1031, 1032, 1041, 1042: illuminating an LED lamp strip with an opened view point; 2: a lens; 3: a display module; 4: a viewing area space; 5: a viewpoint; 201. 202, 203, 204: a longitudinal view zone switching position; 302. 303, 304, 305, 307, 308: positioning a main lamp; 301. 306: left and right eye gap lamps; l: equivalent interpupillary distance; 401, 402, 403, 404: adjusting the boundary of the visual area in real time; 405. 406, 407: judging the condition of switching the lamp in the visual area; 501. 502, 503: 1 plate of U-shaped backlight structure; 504. 505, 506: 2 plates of a U-shaped backlight structure; 507. 508, 509: 3 plates of a U-shaped backlight structure; 510. 511, 512: ideal free-form surface backlight with optimal imaging quality of the lens module; 513. 514, 515: optical axes of the lens units; 516. 517, 518: each lens unit; 519. 520: a lens boundary; 601. 602, 603, 604, 605, 606, 607, 608, 609, 610, 611, 612: the turned-on LED light bars are watched by two persons; 613: first viewer, 614: and a second viewer.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The invention discloses a method for realizing that a single person or multiple persons can watch free stereo images without resolution loss under the assistance of no additional equipment by outputting different 3D pictures to viewers, even different experimenters can watch the free stereo images of different pictures, and the method provides the single-eye lossless ultrahigh-definition resolution, multi-person simultaneous watching and large-depth watching effects.
FIG. 1 is a schematic diagram of a simulated LED ray trace drop point location. As shown in fig. 1, the naked eye 3D display device for multiple people to simultaneously watch includes an image output module (not shown in the figure), a backlight module 1, a lens 2 and a display module 3. The image output module is used for converting the image data into a 3D image with a corresponding format, the output end is synchronously connected with the backlight module 1 and the display module 3, the 3D image is output to the display module in a time division mode, and the synchronous signal is extracted and sent to the backlight control module. The backlight module 1 is connected to the image output module and comprises a plurality of backlight units. The lens 2 is a linear fresnel lens, the display module 3 is an LCD liquid crystal display panel, and the image output module is synchronized with the backlight unit 1. In this embodiment, the 3D image displayed on the display module 3 corresponds to the left eye or the right eye of the viewer, and meanwhile, the LED light bars of the backlight unit turned on by the backlight module 1 correspond to the display module 3 and the left eye or the right eye of the viewer, so that the viewer (single person or multiple persons) can view the free stereo image without resolution loss at the same time without additional equipment assistance, and even different experimenters can view the free stereo image with different images.
As shown in fig. 1, in this embodiment, a forward illumination mode is used to determine a one-to-one mapping relationship between backlight LEDs and viewpoints, and a light ray tracing simulation mode is used to determine a backlight source corresponding to a naked eye 3D display viewpoint. Specifically, light is emitted from the LED light bars 1011, 1012, 1021, 1022, 1031, 1032, 1041, 1042 with different serial numbers in the different backlight units 101, 102, 103, 104, and the like, sequentially passes through the linear fresnel lens 2 and the display module 3, and finally falls at positions corresponding to the view points 5 in the different depth spaces 4.
Fig. 2 is a schematic structural diagram of a U-shaped backlight module. As shown in fig. 2, the backlight module includes a plurality of U-shaped backlight units, and the backlight units include a plurality of LED light bars having different pitches from the lenses, wherein the plurality of LED light bars having different pitches from the lenses form illumination light sources having different object distances from the lenses. The substrates are spliced into a U shape, and the central symmetry point of the U shape of the backlight unit is distributed on the lensOn an arc of radius, where v is the best viewing position of the display device, the lens is a fresnel lens, f is the focal length of the fresnel lens, and the LED light bars of adjacent backlight units at least partially overlap to be practicalThe continuity between the backlight units is now established. As an example, the three split joint substrates of the U-shaped backlight are designed based on the free-form surface light sources 510, 511, 512 with optimal imaging quality of the lens units 516, 517, 518, wherein the second split joint substrate 504, 505, 506 of the U-shaped backlight is perpendicular to the optical axes 513, 514, 515 of the respective lens units; the first splice substrates 501, 502, 503 and the third splice substrates 507, 508, 509 are symmetrical about the optical axis, and for convenience of processing, the lengths of the first splice substrates and the third splice substrates are set to be identical. The brightness of the lens boundaries 519, 520 is provided by the first backlight module, the second backlight module and the third backlight module respectively, and under the LED light bars with different light emitting angles, in order to keep the consistency of the overall brightness of the lens, through simulation calculation, the included angle θ between the first splicing substrate and the second splicing substrate is also changed. Because the U-shaped backlight is closer to the ideal free-form surface backlight, the transverse viewing area range of the U-shaped backlight is greatly enlarged, and a larger degree of freedom is provided for simultaneous viewing of multiple people. In addition, the backlight module comprises an anti-reflection film or an anti-reflection film arranged on the back surface of the substrate, and the anti-reflection film is used for preventing mutual interference and reflection between the lens and the backlight plate when a plurality of people watch the U-shaped backlight plate 1 and the plate 3 in the same backlight module simultaneously, and reducing extra crosstalk increased due to reflection of the backlight plate when a plurality of people watch the backlight module simultaneously. In addition, an anti-reflection film or an anti-reflection film is further arranged between the lens and the display device and used for preventing the reflection of the liquid crystal panel and the Fresnel lens, reducing the reflection crosstalk in the middle of the system and reducing the reflection crosstalk watched by two persons.
Fig. 3 is a schematic diagram of a naked eye 3D display device for simultaneous viewing by multiple persons in a multiple person viewing state. As shown in fig. 3, taking double viewing as an example, when the liquid crystal panel refreshes the left eye image, the backlight LEDs 602, 606, 610, 604, 608, 612 in the figure are synchronously turned on, and the left eye image is only projected to the left eyes of the first viewer 613 and the second viewer 614 under the action of lenses; when the liquid crystal panel refreshes the right-eye image, the backlight LEDs 601, 605, 609, 603, 607 and 611 in the figure are synchronously turned on, the right-eye image is only projected on the right eyes of the double persons 613 and 614 under the action of lenses, and the double persons can simultaneously see the same 3D image. When the liquid crystal panel refreshes different 3D pictures, for example, when the liquid crystal panel refreshes a left eye image of the 3D image 1, backlight LEDs 602, 606 and 610 in the figure are synchronously turned on, and the left eye image is only projected on the left eyes of the double person 614 under the action of lenses; when the liquid crystal panel refreshes the right eye image of the 3D image 1, backlight LEDs 601, 605 and 609 in the figure are synchronously turned on, and the left eye image is only projected on the right eye of the double person 614 under the action of lenses; when the liquid crystal panel refreshes the left eye image of the 3D image 2, the backlight LEDs 604, 608 and 612 in the figure are synchronously turned on, the left eye image of the image 2 is projected only on the left eye of the first viewer 613 under the action of the lens, and similarly, the backlight LEDs 603, 607 and 611 are synchronously turned on when the right eye image of the 3D image 2 is refreshed, the right eye image is projected only on the right eye of the double person 613 under the action of the lens, and the double person can respectively see different 3D images. If the 3D pictures watched by the first viewer and the second viewer are the same, the refresh rate of the display module is greater than or equal to 120Hz; and if the 3D pictures accepted by the first viewer and the second viewer are different, the refresh rate of the display module is larger than or equal to 240Hz. Since the refresh rate of the liquid crystal panel is 240HZ, the experimenter does not have the discomfort of flickering. In addition, the U-shaped backlight structure is closer to an ideal free-form surface backlight, and the double eyes have larger distance, so that the dark lamp area between the double eyes is larger, and the crosstalk is not obviously improved when the double eyes experience.
The naked eye 3D display method realized by the naked eye 3D display device for simultaneous watching of multiple people is described in detail below.
Step one, determining that a visual area of the naked eye 3D display corresponds to a backlight lamp combination. In this step, the one-to-one mapping of the backlight combinations in the viewing area can be realized by using the backlight module in a ray tracing simulation mode, and the method for determining that the backlight combinations are turned on corresponding to the viewing area of the naked eye 3D display is used for determining.
In this step, fig. 4 is a flowchart of screening backlight corresponding to the naked eye 3D viewing area. As shown in fig. 4, determining that the view area of the naked eye 3D display corresponds to the backlight on combination includes steps S401 to S405.
Step S401: and setting system parameters, wherein the parameters mainly comprise the space physical coordinates of each LED, the number of photons emitted by the LEDs randomly, the photon emission angle, the structural parameters of the linear Fresnel lens and the actual space physical coordinates of the linear Fresnel lens. In addition, the LED lamp strips of each backlight module of the naked eye 3D system are required to be numbered.
Step S402: each row of LED light bars of the simulated backlight module randomly emits photons with a certain angle and quantity. The angle takes the normal line of the front surface of the LED as a datum line, and the angles are respectively at a certain angle and have different numbers of photons at different angles.
Step S403: the photons are refracted by the linear Fresnel lens, the refraction is calculated according to a refraction calculation formula, and finally, the photons are far away from the linear Fresnel lens from the lens tooth-shaped structure, and the light path or the photon falling point position of the photons is determined at different longitudinal positions and transverse positions from the display.
Step S404: screening different main lamps for different viewpoints. And screening the LED lamp bar serial numbers of the light spots of different backlight modules, which fall points are closest to the viewpoint positions, at each viewpoint position to serve as a main lamp, wherein the main lamp is an LED lamp bar with the light ray track just falling points at the viewpoint positions. The different viewpoints are mainly divided into viewpoints at different longitudinal positions and different transverse positions, and the screening process screens the LED lamp strips with the LED facula falling points of each backlight module closest to the viewpoints by taking the viewpoint positions as references. In particular, the light path or photon drop point position is determined at different longitudinal and lateral positions from the display. The method mainly comprises the steps of randomly emitting photons of each row of LED light bars and collecting the photons at different depth positions, wherein the half-width central position of a photon distribution curve is defined as a simulated photon drop point position. In this embodiment, the number of emitted photons of the LED light bar is set to be greater than 1000000, and the emission angle of the emitted photons follows the emission curve of the actual LED light bar, and the photons at different positions are simulated and counted through refraction of the linear fresnel lens.
The depth of a continuous visual area is expanded, the depth measurement precision of a double camera is taken as a reference, the interval is taken as a step length, spot falling points are simulated at different longitudinal positions, a set of LED serial number combinations corresponding to different longitudinal positions are screened, if the LED serial number combinations of different depths d1, d2 and d3 at the same transverse position are unchanged, three depths d1, d2 and d3 can be combined into the same set of LED serial number combinations, and the stroboscopic effect of LEDs caused by the back-and-forth depth movement is reduced; if the lamp serial numbers are different at the same transverse position in different depth d1, d2 and d3, a set of LED serial number combinations are started at different depth distances, the density of a depth visual area is increased to the greatest extent, and the continuity of the serial number switching of the depth LED combinations is ensured.
Step S405: and recording the number of the main lamp and loading a program. The main lamp number refers to the number of the LED lamps which are required to be turned on from different viewpoints corresponding to different backlight modules, an LED sequence (namely an LED lamp bar combination) is formed, and the corresponding relation between the viewpoints and the physical positions is loaded to a computer.
In this step, in order to achieve high uniformity and low crosstalk, the number of lamps turned on of the backlight unit may also be set. And determining the number N of the LED lamp strips which are continuously started, taking the interpupillary distance as the distance between the two main lamps, respectively continuously starting the LED lamp strips of the N1 columns to carry out monocular illumination, and spacing the preset number of LED lamp strips. Fig. 5a-5b are schematic diagrams of determining the number of lights on. As shown in fig. 5a, the effective pupil distance between the left eye and the right eye is L, and at a position 85cm away from the display, in general, the pupil is positioned by two rows of lamps 302 and 303 and two rows of lamps 304 and 305, respectively, and 2 and 3 rows of continuous N rows of lamps are continuously turned on from the inside and the outside respectively to realize monocular illumination. At the same time, a column of LED light bars 301 is turned off to reduce crosstalk between the left and right eyes. If the crosstalk is high, the method shown in fig. 5b can be followed, and the LED light bars 307, 308 are respectively used as main lights for locating pupil positions, so that the 2-column LED light bars are turned off. If the uniformity is poor, the number of continuous lights can be extended to 8 columns.
In the actual operation process, the distance between two main lamps with different depths is slightly different, the continuous turn-on number corresponding to the optimal viewing distance d1 is set as N1, and the continuous turn-on number corresponding to the different depths di of the display is set as Ni. The spacing between the two main lamps is determined according to the formula N1/ni=di/d 1.
Assuming that the lamp density m, the lamp-to-lens distance d1, the human eye-to-lens distance d2, and the formula (n·m)/l=d1/d 2 are used, the binocular pupil interval lamp number N-1 can be obtained. In addition, in order to ensure continuity of depth switching, the number of continuous lights turned on to realize monocular lighting is different, the number of continuous lights turned on at an optimal viewing distance d1 is set to be N1 as a main value, the number of continuous optimal lights turned on at different depth distances di from a display is set to be Ni, and the number of continuous lights turned on is calculated according to a formula of N1/Ni=d1/di. The continuous turn-on number and the interval number obtained by the formula can be optimized according to different occasions. If the crosstalk is required to be lower in a specific occasion, the number of the interval lamps is increased by 1-2 columns; if higher uniformity is needed in specific occasions, the number of continuous lights which are turned on in 1-2 rows can be properly increased or the number of lights which are turned on in 1 row at intervals can be reduced, and the numbers of lights which are turned on at two sides of the left and right eye two mother lights are consistent, so that the consistent display quality of the left and right eyes is ensured.
And secondly, testing the jitter amount or the identification error of human eyes on the tested pixels so as to reduce the static and dynamic flicker intensity. And selecting a view point density value according to the physical distance corresponding to the pixel, and determining that the view region switching condition is reached when the view point density value deviating from the last switching position for the second time exceeds the density of the view region within a preset frame number (for example, 10 detection).
Fig. 6a and 6b are schematic diagrams of achieving high quality longitudinal expansion continuity. As shown in fig. 6a-6b, the naked eye 3D display device for simultaneous viewing by multiple people provided in this embodiment realizes continuous depth expansion by using a mode of switching the viewing area to turn on the light. The mode mainly realizes longitudinal expansion by having a set of light-on sequences at different depth positions and realizing continuous switching among different longitudinal light-on sequences.
The switching point is selected as shown in fig. 6a-6b, and the switching point can be determined if crosstalk and uniformity are poor by measuring the longitudinal range of the expansion of the best display effect formed by a set of backlight sequences at different longitudinal positions. Obviously, if there is no switching between the positions 201, 202, 203 and 204 in the figure, the light sequence is continuously used at the position of 850mm, so that the crosstalk and uniformity of the display effect are poor; if the switching of the LED sequences is implemented at the positions 201, 202, 203, 204, the display effect is optimal. In addition, the distance between the switching points is required to be larger than the distance measurement precision, so that the error in recognition of the depth position of the distance measurement software is avoided, and the continuous switching of the LED lamp combination in the depth is caused.
And thirdly, when the visual area switching condition is reached, taking preset precision as a distance, switching to a backlight combination corresponding to the longitudinal position by a set of backlight combinations corresponding to the longitudinal position to realize the expansion and continuous switching of the depth.
In the implementation process, the intensive vision area is also required to be measured, and the precision of human eye tracking is utilized to determine the density of the vision area line so as to reduce static and dynamic flicker. And establishing a dense visual area, selecting viewpoint positions according to the distance by taking the precision of pupil identification by the camera as the distance, respectively screening the nearest different module LED sequence combinations of each viewpoint position, and storing the corresponding relation between the viewpoint positions and the LED sequence combinations into a human eye identification software program. When the human eyes move to the viewpoint position, the LED sequence combination corresponding to the viewpoint position is started to illuminate the human eyes. In order to establish the intensive view area, the LED light bars of the backlight module are preferably arranged in a continuous staggered mode, so that any view area in the view area space is illuminated by the LED light bars.
FIG. 7 is a diagram of real-time adjustment of the view area line of the close-up region. As shown in fig. 7, the naked eye 3D display device for multi-person viewing includes: the density of the visual area line is determined by the precision of human eye tracking, so that the flicker intensity of the close-up area is reduced, and the tracking scheme of the visual area line is adjusted in real time. The specific scheme is as follows:
firstly, fixing a human head model, starting a human eye tracking program, and watching pupil position fluctuation conditions of human eye tracking for a period of time to obtain the accuracy x pixels of pupil identification, namely a static identification error. Because the backlight continuity and the light paths formed by the combination of the LEDs of different backlight modules cover any space position, the physical space interval delta d corresponding to the human eye tracking pixel space 2x pixel is used as the line density of the intensive visual area, the brightness intensity difference caused by lamp cutting caused by pupil identification errors is reduced, and the flicker intensity is further reduced. In addition, as shown in fig. 5, the real-time adjustment of the view line can also reduce flicker. When the eye tracking pupil is in the view region 401, the LED does not need to be switched, that is, no obvious flicker is generated, and when the switching condition 405 is reached, that is, when the eye tracking program recognizes that the physical position is greater than the width of the view region from one switching position for the second time, the eye tracking program switches to the second view region 402, and so on, so as to avoid flicker caused by back and forth lamp cutting at the boundary caused by the boundary of the traditional fixed view region.
When pupil tracking and positioning are carried out, recognition errors inevitably occur, and errors exceeding the switching positions of the visual areas are too large, so that erroneous judgment of the visual areas is caused, and the next visual area is switched to be the next visual area in error, and flicker is caused. The static flicker is reduced by improving the accuracy of the judgment of the visual area, the brightness variation caused by the misjudgment of the visual area is reduced by using the light-on scheme of the intensive visual area, and the flicker intensity is reduced.
In addition, the naked eye 3D display device capable of achieving lossless super-definition resolution and simultaneous multi-user viewing converts image data into 3D images in a corresponding format through the influence output module, a 3D picture corresponding to the left eye or the right eye is output to a first viewer through the display module, a 3D picture corresponding to the left eye or the right eye is output to a second viewer, and a backlight unit corresponding to the left eye or the right eye of the first viewer or the second viewer is started at the same time, so that a free three-dimensional image without resolution loss can be simultaneously viewed for a single person or multiple persons without additional equipment assistance, and even different experimenters can see free three-dimensional images of different pictures.
It is to be understood that the present invention is not limited to the above-described embodiments, and that the present invention is intended to include modifications and variations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (8)
1. The utility model provides a harmless super clear resolution, many people watch simultaneously, bore hole 3D display device of big depth, its characterized in that includes:
the image output module is used for converting the image data into a 3D image with a corresponding format;
the backlight module is connected to the display output module and comprises a plurality of U-shaped backlight units, each unit comprises a plurality of LED lamp strips with different lens spacing, and the LED lamp strips in different backlight units can be combined to illuminate the whole display range;
a display module which is controlled in synchronization with the backlight unit; when the display module displays a 3D picture corresponding to the left eye of a first viewer, the backlight module starts a backlight unit corresponding to the left eye of the first viewer, and when the display module displays a 3D picture corresponding to the right eye of the first viewer, the backlight module starts a backlight unit corresponding to the right eye of the first viewer; when the display module displays a 3D picture corresponding to the left eye of a second viewer, the backlight module starts a backlight unit corresponding to the left eye of the second viewer, and when the display module displays a 3D picture corresponding to the right eye of the second viewer, the backlight module starts a backlight unit corresponding to the right eye of the second viewer;
if the 3D pictures watched by the first viewer and the second viewer are the same, the refresh rate of the display module is greater than or equal to 120Hz; if the 3D pictures accepted by the first viewer and the second viewer are different, the refresh rate of the display module is more than or equal to 240Hz;
the backlight combination mapped to the viewpoints one by one is determined as follows:
each row of LED light bars of the simulation backlight unit randomly emits photons with a certain angle and quantity, the photons are refracted by the linear Fresnel lens, and the light path or photon falling point positions of the photons are determined at different longitudinal positions and transverse positions away from the display;
determining the number N of the LED lamp strips which are continuously started, taking the interpupillary distance as the distance between two main lamps, respectively continuously starting the LED lamp strips of N1 columns to carry out monocular illumination, and spacing the LED lamp strips with the preset interpupillary distance;
screening the LED lamp bar serial numbers of the light spots of different backlight modules, which fall points are closest to the viewpoint positions, at each viewpoint position to serve as a main lighting lamp, wherein the main lighting lamp is an LED lamp bar with the light ray track just falling points at the viewpoint positions; determining the number Ni of LED light bars continuously turned on at different depth positions and the number (N-1) of interval LEDs between two main illumination lamps comprises:
setting the continuous turn-on number corresponding to the optimal viewing distance d1 as N1 and the continuous turn-on number at different depth distances di from the display as Ni;
determining the number Ni of the LED light bars which are continuously turned on according to a formula N1/Ni=d1/di;
setting the density of the LED light bars as m, the distance from the LED light bars to the lens as d1, the distance from the human eyes to the lens as d2, and determining the number of LEDs at intervals between the two main lights as (N-1) according to a formula (N.m)/L=d1/d 2);
where L is the viewer interpupillary distance.
2. The lossless super-resolution, multi-person simultaneous viewing, large-depth naked-eye 3D display device of claim 1, wherein the expansion of the viewing zone depth range is achieved by turning on different backlight unit combination lamps to turn on illumination sources required for different image point positions of the lens to correspond to different object distance positions.
3. The lossless super-resolution, multi-person simultaneous viewing, large-depth naked-eye 3D display device according to claim 1, wherein reducing static and dynamic flicker intensities of the naked-eye 3D display comprises:
testing the shake quantity or the identification error of human eyes to a tested pixel, and selecting a viewpoint density value according to the physical distance corresponding to the pixel;
determining that a transverse visual area switching condition is reached when the viewpoint density value deviating from the last switching position for the second time exceeds the density of the visual area within the continuously preset frame number, and transversely switching the LED combination;
when the longitudinal visual area is switched, taking the precision of the ranging software as the interval, switching to a backlight combination corresponding to the longitudinal position by using each longitudinal position as a set of backlight combination corresponding to the longitudinal position so as to realize the expansion and continuous switching of the depth.
4. The lossless super-resolution, multi-person simultaneous viewing, large-depth naked eye 3D display device according to claim 3, wherein:
the backlight unit comprises a plurality of substrates which are spliced to form a U shape, and the central symmetry point of the U shape of the backlight unit is distributed on the lens to form a lensOn an arc of radius, where v is the best viewing position of the display device, and the lens is a fresnel lensF is the focal length of the Fresnel lens, and the LED light bars of adjacent backlight units are at least partially overlapped to realize the continuity between the backlight units.
5. The lossless super-resolution, multi-person simultaneous viewing, large-depth naked eye 3D display device according to claim 4, wherein:
taking the photon number collected by each row of LED light bars at different depth positions as a main part, and defining the half-width central position of a photon distribution curve as a simulated photon drop point position;
the number of emitted photons of the LED light bar is set to be more than 1000000, and the photons of different positions are simulated and counted through refraction of the linear Fresnel lens.
6. The lossless super-resolution, multi-person simultaneous viewing, large-depth naked eye 3D display device according to claim 5, wherein: after determining the number of the LED light bars which are continuously turned on and the number of the interval lights, the method further comprises the following steps:
the LED light bars with 1-2 columns of intervals are properly increased according to occasions to reduce crosstalk, or the number of continuous on lights with 1-2 columns is increased or the number of the interval lights with 1-2 columns is reduced to increase uniformity.
7. The lossless super-resolution, multi-person simultaneous viewing, large-depth naked eye 3D display device according to claim 6, wherein:
when the visual area switching condition is reached, taking the preset precision as a distance, and switching to the backlight combination corresponding to the longitudinal position by using a set of backlight combinations corresponding to the longitudinal position corresponding to each longitudinal position to realize the expansion and continuous switching of the depth comprises the following steps:
taking the depth measurement precision of the double cameras as a reference, taking the depth measurement precision as a step length, simulating light spot falling points at different longitudinal positions, and screening a set of LED lamp strip serial number combinations corresponding to the longitudinal positions;
if the LED serial number combination of the different depths d1, d2 and d3 at the same transverse position is unchanged, combining three depths corresponding to d1, d2 and d3 into the same set of LED lamp strip serial number combination so as to reduce stroboscopic effect of the LED lamp strip caused by front-back depth movement;
if the lamp serial numbers are different at the same transverse position in different depth d1, d2 and d3, a set of LED serial number combinations are started at different depth distances, so that the density of a depth visual area is improved, and the continuity of switching of the serial numbers of the depth LED combinations is ensured.
8. The lossless super-resolution, multi-person simultaneous viewing, large depth, naked-eye 3D display device of claim 7, wherein testing the amount of human eye shake or recognition error for the test pixels comprises:
fixing the dummy head model, and starting the human eye tracking program software for a period of time to obtain the pupil position identified by human eye tracking;
and drawing a graph by taking the frame rate of the camera as an abscissa and the pupil position as an ordinate, and determining the jitter amount or the recognition error of human eye tracking according to the graph.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110200345.1A CN112946912B (en) | 2021-02-23 | 2021-02-23 | Naked eye 3D display device capable of achieving lossless super-definition resolution and simultaneous watching of multiple people |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110200345.1A CN112946912B (en) | 2021-02-23 | 2021-02-23 | Naked eye 3D display device capable of achieving lossless super-definition resolution and simultaneous watching of multiple people |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112946912A CN112946912A (en) | 2021-06-11 |
| CN112946912B true CN112946912B (en) | 2023-08-04 |
Family
ID=76245463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110200345.1A Active CN112946912B (en) | 2021-02-23 | 2021-02-23 | Naked eye 3D display device capable of achieving lossless super-definition resolution and simultaneous watching of multiple people |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112946912B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113900273B (en) * | 2021-10-09 | 2023-12-26 | 广东未来科技有限公司 | Naked eye 3D display method and related equipment |
| CN114326142A (en) * | 2021-11-24 | 2022-04-12 | 中山大学 | Full-parallax naked-eye 3D display system and method based on human eye tracking |
| CN114815292B (en) * | 2022-04-18 | 2024-01-26 | 广州弥德科技有限公司 | Non-flash directional backlight naked eye 3D display device for multi-person viewing |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2194630A1 (en) * | 1996-01-24 | 1997-07-25 | Shinmei Electric Co., Ltd. | Viewing system for electronic 3-d animation and 3-d viewing mirror |
| CN103197428A (en) * | 2013-04-16 | 2013-07-10 | 佛山市英视通电子科技有限公司 | Naked eye stereoscopic image display optical device based on arc-shaped backlight and lens |
| CN103605211A (en) * | 2013-11-27 | 2014-02-26 | 南京大学 | Tablet non-auxiliary stereo display device and method |
| CN103760677A (en) * | 2014-02-14 | 2014-04-30 | 佛山市英视通电子科技有限公司 | Even and non-dark-space backlight pointing-type naked-eye 3D display method, device, unit and system |
| CN203930225U (en) * | 2014-06-07 | 2014-11-05 | 杭州立体世界科技有限公司 | High definition bore hole Portable stereoscopic video player light path circuit |
| CN104144336A (en) * | 2014-07-15 | 2014-11-12 | 深圳市华星光电技术有限公司 | Image displaying method and device of multi-view stereo display |
| CN104216133A (en) * | 2014-09-16 | 2014-12-17 | 中山大学 | Naked eye 3D display method, device and system with adjustable depth of visual area |
| CN105093549A (en) * | 2015-08-31 | 2015-11-25 | 中山大学 | Directive backlight naked-eye 3D display apparatus and method realizing multi-person tracking |
| KR20150136157A (en) * | 2014-05-26 | 2015-12-07 | 경북대학교 산학협력단 | Glasses-free 3D display device |
| CN106773080A (en) * | 2015-12-25 | 2017-05-31 | 深圳超多维光电子有限公司 | 3 d display device and display methods |
| CN108345122A (en) * | 2018-01-29 | 2018-07-31 | 中山大学 | A kind of determining bore hole 3D display vision area corresponds to the method and system of backlight |
| JP2019061058A (en) * | 2017-09-26 | 2019-04-18 | 学校法人慶應義塾 | Stereoscopic display device, stereoscopic display method, and stereoscopic display program |
| CN110401829A (en) * | 2019-08-26 | 2019-11-01 | 京东方科技集团股份有限公司 | Naked eye 3D display device and display method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8587641B2 (en) * | 2011-03-04 | 2013-11-19 | Alexander Roth | Autostereoscopic display system |
-
2021
- 2021-02-23 CN CN202110200345.1A patent/CN112946912B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2194630A1 (en) * | 1996-01-24 | 1997-07-25 | Shinmei Electric Co., Ltd. | Viewing system for electronic 3-d animation and 3-d viewing mirror |
| CN103197428A (en) * | 2013-04-16 | 2013-07-10 | 佛山市英视通电子科技有限公司 | Naked eye stereoscopic image display optical device based on arc-shaped backlight and lens |
| CN103605211A (en) * | 2013-11-27 | 2014-02-26 | 南京大学 | Tablet non-auxiliary stereo display device and method |
| CN103760677A (en) * | 2014-02-14 | 2014-04-30 | 佛山市英视通电子科技有限公司 | Even and non-dark-space backlight pointing-type naked-eye 3D display method, device, unit and system |
| KR20150136157A (en) * | 2014-05-26 | 2015-12-07 | 경북대학교 산학협력단 | Glasses-free 3D display device |
| CN203930225U (en) * | 2014-06-07 | 2014-11-05 | 杭州立体世界科技有限公司 | High definition bore hole Portable stereoscopic video player light path circuit |
| CN104144336A (en) * | 2014-07-15 | 2014-11-12 | 深圳市华星光电技术有限公司 | Image displaying method and device of multi-view stereo display |
| CN104216133A (en) * | 2014-09-16 | 2014-12-17 | 中山大学 | Naked eye 3D display method, device and system with adjustable depth of visual area |
| CN105093549A (en) * | 2015-08-31 | 2015-11-25 | 中山大学 | Directive backlight naked-eye 3D display apparatus and method realizing multi-person tracking |
| CN106773080A (en) * | 2015-12-25 | 2017-05-31 | 深圳超多维光电子有限公司 | 3 d display device and display methods |
| JP2019061058A (en) * | 2017-09-26 | 2019-04-18 | 学校法人慶應義塾 | Stereoscopic display device, stereoscopic display method, and stereoscopic display program |
| CN108345122A (en) * | 2018-01-29 | 2018-07-31 | 中山大学 | A kind of determining bore hole 3D display vision area corresponds to the method and system of backlight |
| CN110401829A (en) * | 2019-08-26 | 2019-11-01 | 京东方科技集团股份有限公司 | Naked eye 3D display device and display method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 裸眼3D显示串扰率实时检测系统设计;周建英等;《激光与光电子学进展》;第54卷(第6期);061201-1至061201-8 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112946912A (en) | 2021-06-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112946912B (en) | Naked eye 3D display device capable of achieving lossless super-definition resolution and simultaneous watching of multiple people | |
| US5410345A (en) | Stroboscopic illumination system for video displays | |
| EP0570179B1 (en) | Directional display | |
| US5036385A (en) | Autostereoscopic display with multiple sets of blinking illuminating lines and light valve | |
| US8587641B2 (en) | Autostereoscopic display system | |
| KR0145558B1 (en) | Three dimensional display apparatus | |
| US7084841B2 (en) | Method and apparatus for the presentation of three-dimensional images | |
| JPH08505014A (en) | Strobe lighting system for video display | |
| CN102272665A (en) | Backlighting system for a 2d/3d autostereoscopic multiview display | |
| US20060012676A1 (en) | Stereoscopic image display | |
| US8403487B2 (en) | Stereo-image displaying apparatus and method for reducing stereo-image cross-talk | |
| CN104597608B (en) | The directive property backing structure and method of the LED-based three-dimensional display without auxiliary equipment | |
| CN114326142A (en) | Full-parallax naked-eye 3D display system and method based on human eye tracking | |
| CN108107598A (en) | A kind of curved surface bore hole 3D display device | |
| CN104216130A (en) | Naked eye 3D display method, device and system with adjustable depth of visual area | |
| CN114035340A (en) | Backlight module, display module, driving method and display device | |
| CN114460758A (en) | Polarized light type directional backlight naked eye 3D display system | |
| CN208000416U (en) | A kind of novel curved surface bore hole 3D display device | |
| CN113156658A (en) | Stereoscopic display system based on synchronous spatial light modulator | |
| CN114815292B (en) | Non-flash directional backlight naked eye 3D display device for multi-person viewing | |
| CN214540260U (en) | Stereoscopic display system based on synchronous spatial light modulator | |
| CN114035339A (en) | Backlight module, display module, driving method and display device | |
| NL1003960C2 (en) | Apparatus for three-dimensional visualization of objects, as well as a method for producing a three-dimensional visualizable image of an object. | |
| JP4348337B2 (en) | Light source device for stereoscopic image display device | |
| CN109613709B (en) | Directional display device based on two LCD screens |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |