CN114114679B - Depth-control directional illumination display system and method - Google Patents
Depth-control directional illumination display system and method Download PDFInfo
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Abstract
The invention discloses a directional illumination display system and a directional illumination display method for depth regulation, which relate to the technical field of display illumination, and are characterized in that the direction of an illumination beam is determined by utilizing a directional light source under the guidance of a central processing unit based on the eye position and the viewing direction of a user, so that the subsequent illumination beam is ensured to spread in a specific direction, then the light beam is regulated and shaped by utilizing a light modulation module, a depth-adjustable long focal line illumination beam instead of a divergent light beam of ordinary illumination is formed, the light modulation module and the directional light source are overlapped on the functional effect to form the directional depth-adjustable display illumination, the light beam is suddenly stopped at a certain distance from the display module, meanwhile, the influence on a nearby area is avoided, then image information loaded into the display module is carried, the user can realize viewing in a customized visual space view area, and the user cannot watch the image information loaded in the display module outside the customized visual space, so that longitudinal depth control is realized, and the interference of light display noise to an irrelevant user is avoided.
Description
Technical Field
The invention relates to the technical field of display illumination, in particular to a depth-control directional illumination display system and a depth-control directional illumination display method.
Background
Electronic displays are closely related to human life, display technologies are also being vigorously developed under the traction of markets, and modern displays include watches, cell phones, computer displays, televisions and other devices. For different types of displays, the light source alone functions as an illumination source and may also be used as a pattern carrier, such as a light emitting diode (OLED) display. Illumination in the conventional sense, generally referred to as lamp illumination, LED illumination, has recently also emerged as a concept such as laser illumination, while illumination sources now also extend from incoherent sources to coherent sources. In real life, display and illumination are not separable, and different illumination distributions are often required to meet different display requirements.
At present, display illumination technology is rapidly developed, mainly performance improvement in display characteristics such as dynamic range, color gamut, uniformity, brightness and efficiency is mainly shown, in addition, in the aspect of illumination direction control, various technologies are used for controlling illumination directions, as in the prior art, a spliced directional backlight source is disclosed, namely, based on the directional backlight display technology, a space-time multiplexing method is adopted, light transmission is regulated and controlled to a certain extent by using an optical device, a series of viewing areas capable of being independently switched on and off are formed at a viewing distance, the characteristic illumination characteristics of the directional display illumination can enable images to be visible only in a specified direction, meanwhile, the directional illumination technology can be combined with retina tracking, so that the display illumination can be more intelligent, illumination light can only spread to an area around the retina of an observer, for example, in a dark environment (such as a passenger plane rest cabin in long-distance flight), the illumination noise of an independent viewer can be generated, but the application of the directional illumination technology enables illumination to have little influence on passengers nearby outside the transverse viewing areas. However, in the vertical viewing area, the following passengers may be disturbed, and the illumination light may propagate a long distance before completely disappearing, so if the depth of the illumination light source is not regulated, light noise may still be caused to the non-display device user, and further, light hazard may be caused.
Disclosure of Invention
In order to solve the problem that the depth of an illumination light source cannot be controlled in a traditional illumination display mode, the invention provides a directional illumination display system and a directional illumination display method for controlling the depth, longitudinal depth control is realized, and interference of light display noise on irrelevant users is avoided.
In order to achieve the technical effects, the technical scheme of the invention is as follows:
a depth-modulated directional illuminated display system, comprising: the device comprises a central processing unit, a human eye tracking module, a directional light source, a light modulation module and a display module; the human eye tracking module is used for positioning the positions of the eyes of a user positioned in the visual space vision area, transmitting the information of the positions of the eyes of the user to the central processing unit, analyzing the space angles and the depths of the eyes of the user by the central processing unit according to the information of the positions of the eyes of the user to obtain the viewing directions of the eyes of the user, guiding the directional light source to emit illumination light beams according to the viewing directions of the eyes of the user, transmitting the illumination light beams to the light modulation module, carrying out distribution regulation and shaping on the illumination light beams, emitting the illumination light beams after the distribution regulation and shaping, entering the display module, carrying the image information loaded into the display module, then entering the visual space vision area, and watching the images displayed by the display module by the user in the visual space vision area; the longitudinal depth range of the visual space view area is determined by parameters of the light modulation module, and the transverse range is determined by the transverse range of the emergent light field of the illumination light beam after the light modulation module is distributed, regulated and shaped.
In the technical scheme, the visual space view area can be customized in advance according to the parameters of the light modulation module, the human eye tracking module is used for positioning the eyes of a user positioned in the visual space view area, under the guidance of the central processing unit, the direction of illumination is determined by utilizing the directional light source, the subsequent illumination light beam is ensured to spread in a specific direction, then the light modulation module is utilized for adjusting and shaping the light beam, a depth-adjustable long focal line illumination light beam instead of a common illumination divergent light beam is formed, the two functional effects are overlapped to form a directional depth-adjustable display illumination, the display illumination is enabled to be suddenly stopped at a certain distance from the display module, meanwhile, the influence on the nearby area is avoided, then image information loaded into the display module is carried, the user can realize viewing in the customized visual space view area, and outside the customized visual space view area, the user cannot view the image information loaded in the display module and does not receive the illumination light beam, and noise is not displayed.
Preferably, the directional light source is a coherent light source or a noncoherent light source. The coherent light source and the incoherent light source have advantages and disadvantages, the coherent light source can form special interference fringes on the microcosmic aspect, and has special properties of no diffraction and self-healing, while the incoherent light source does not have some microcosmic characteristics of the coherent light source, but maintains macroscopic depth regulation characteristics.
Preferably, the light modulation module is a coated conical lens. The lens with the surface-shaped structure can be used as a light modulation module to form a light field with high energy concentration in a customized visual space visual area, and the energy of the light field is rapidly diverged in a non-customized interval, so that the lens has no illumination interference to nearby users, and is a green high-environmental-protection illumination mode.
Preferably, the size of the directional light source is smaller than the size of the coated conical lens.
Preferably, if the size of the directional light source is larger than the size of the coated conical lens, an aperture stop or an equivalent element is added between the directional light source and the coated conical lens for restricting the size of the directional light source.
Preferably, the film-covered conical lens absorbs the incident central beam of the illuminating beam by setting a beam absorption radius to form a central hollow dark field, the unabsorbed annular illuminating beam is emergent to form a concentrated illuminating beam view field of a visual area of the visual space, the beam absorption radius regulates and controls the focal line position formed in the longitudinal direction of the visual area of the visual space, and the illuminating beam of the visual area of the visual space is regulated and controlled in the longitudinal direction; the longitudinal depth range of the view region of the viewing space satisfies the expression:
wherein Z is fl Represents the longitudinal depth range on the central axis of the visual zone of the visual space, r 1 And r 2 The outer radius and the light beam absorption radius of the coated conical lens are respectively r 1 ＞r 2 ，n a The refractive index of the coated conical lens is shown,the characteristic angle of the coated conical lens is radian.
Here, the visual space view area has the characteristic of depth visual limitation, and the range is determined by the parameters of the light modulation module used for initial illumination beam distribution regulation and control shaping in the earlier stage, and the customization of the visual space view area and the contour shaping function of the light modulation module are complemented, so that the user can realize watching in the customized visual space view area, and can not watch the image information loaded in the display module in the non-customized interval, and the illumination beam is not received.
Preferably, the display module adopts an optical film layer, a display image is customized on the optical film layer or an LCD screen is adopted to change the image display in real time, and the image loaded by the display module does not influence the macroscopic depth characteristic of the illuminating light beam emitted after the distribution regulation and shaping.
The scattering property of the optical film layer is extremely small or negligible, and the static image information can be directly rubbing on the optical display film layer for static display, so that the transmission of the illumination light beams after the distribution regulation and control shaping in a visual area of a visual space is not affected.
The invention also provides a depth-control directional illumination display method, which is realized based on the depth-control directional illumination display system and comprises the following steps:
s1, positioning the positions of the eyes of a user positioned in a visual area of a visual space by utilizing a human eye tracking module, and transmitting the information of the positions of the eyes of the user to a central processing unit;
s2, the central processing unit analyzes the space angle and depth of the two eyes of the user according to the two-eye position information to obtain the viewing direction of the two eyes of the user, and guides the directional light source to emit illumination light beams directionally according to the viewing direction of the two eyes of the user;
s3, transmitting the directional illumination light beams to a light modulation module, carrying out distribution regulation and shaping on the directional illumination light beams by the light modulation module, emitting the illumination light beams after the distribution regulation and shaping, entering a display module, carrying image information loaded into the display module, and then entering a visible space view area;
s4, the user views the image displayed by the display module in the visual area of the visual space.
Preferably, the visual space region in step S1 is customized in advance according to parameters of a light modulation module, where the light modulation module is a coated conical lens, and the parameters include: outer radius r 1 Beam absorption radius r 2 Refractive index n a Angle of featuresThe longitudinal depth range of the customized view volume region satisfies the expression:
wherein Z is fl Representing the longitudinal depth range on the central axis of the visual zone of the visual space; the transverse range of the customized visible space visual area is determined by the transverse range of the emergent light field of the illumination light beam after the light modulation module is distributed, regulated and shaped.
Preferably, the depth-modulated directional illumination display ends when the user's binocular position is outside the eye tracking module monitoring range.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
the invention provides a depth-regulating directional illumination display system and a method, which are based on the eye position and the viewing direction of a user, under the guidance of a central processing unit, the direction of an illumination beam is determined by utilizing a directional light source, so that the subsequent illumination beam is ensured to propagate to a specific direction, then the light beam is regulated and shaped by utilizing a light modulation module, a depth-adjustable long focal line illumination beam instead of a common illumination divergent beam is formed, the light modulation module and the directional light source are overlapped to form a directional depth-adjustable display illumination on the functional effect, the light beam is suddenly stopped at a certain distance from the display module, the nearby area is not influenced, then image information loaded into the display module is carried, the user can watch the image information loaded in the customized visual space viewing area, the user can not watch the image information loaded in the display module outside the customized visual area, the longitudinal depth control is realized, and the interference of light display noise to an irrelevant user is avoided.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a depth-control directional illumination display system according to embodiment 1 of the present invention;
FIG. 2 is a schematic view of a coated conical lens according to embodiment 1 of the present invention;
FIG. 3 is a schematic cross-sectional view of a coated conical lens according to embodiment 1 of the present invention;
FIG. 4 is a schematic diagram of an unregulated shaping of a conventional LED light;
FIG. 5 is a schematic view of an illumination beam profile of a depth-modulated directional illumination display system according to embodiment 1 of the present invention;
fig. 6 is a schematic flow chart of a depth-control directional illumination display method according to embodiment 2 of the present invention;
FIG. 7 is a graph showing normalized light energy measurements in the visible and non-visible space viewing zones as set forth in example 3 of the present invention;
fig. 8 is a schematic diagram of the viewing results of the display module according to embodiment 3 of the present invention at different longitudinal depths of the central axis of the viewing zone of the visual space.
1, a central processing unit; 2. a human eye tracking module; 3. a directional light source; 4. a light modulation module; 5. a display module; 41. a viewable spatial view region; 51. a non-viewable spatial view region; 411. the user's eyes.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the present patent;
for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions;
it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical scheme of the invention is further described below with reference to the accompanying drawings and examples.
Example 1
In order to solve the problem that when the depth of the illumination light source cannot be regulated, illumination of the display device carried by the illumination light source can cause optical noise to a non-display device user on the emergent longitudinal depth, as shown in fig. 1, this embodiment provides a directional illumination display system with depth regulation, which comprises: the system comprises a central processing unit 1, a human eye tracking module 2, a directional light source 3, a light modulation module 4 and a display module 5; the human eye tracking module 2 is used for positioning the positions of eyes of a user positioned in a visual space vision area, and is used for positioning the positions of eyes of the user based on the principle of the spatial position relation of binocular cameras, and not described in detail herein, the human eye tracking module 2 transmits the information of the positions of the eyes of the user to the central processing unit 1, the central processing unit 1 analyzes the spatial angles and the depth of the eyes of the user according to the information of the positions of the eyes to obtain the viewing directions of the eyes of the user, the directional light source 3 is guided to emit illumination light beams according to the viewing directions of the eyes of the user, the illumination light beams are transmitted to the light modulation module 4, the light modulation module 4 performs distribution regulation and shaping on the illumination light beams after the distribution regulation and shaping, the illumination light beams are emitted and then enter the display module 5 to carry image information loaded into the display module 5, then enter the visual space vision area, and the user views images displayed by the display module 5 in the visual space vision area.
In this embodiment, referring to fig. 1, in the structure, the reference number of the visual space view area is denoted by 41, the reference number of the human eye of the user is denoted by 411, and the reference number of the non-visual space view area outside the visual space view area 41 is denoted by 51, where the default user is located in the visual space view area 41 to explain the working logic of the entire depth-control directional illumination display system, as shown in fig. 1, the human eye tracking module 2 links the directional light source 3 and the light modulation module 4, and also serves as an internal backlight assembly.
Even if the default user is located in the visual space view area 41, the actual visual space view area 41 is customized in advance before the design of the directional illumination display system for depth regulation, the customized parameters are based on the parameters of the light modulation module 4, the longitudinal depth range is determined by the parameters of the light modulation module 4, and the transverse range is determined by the transverse range of the emergent light field of the illumination light beam after the distribution regulation and shaping of the light modulation module 4. Under the guidance of the central processing unit 1, the directional light source 3 is used for determining the illumination direction, ensuring that the subsequent illumination light beams can only propagate in a specific direction, and can only be seen in the direction seen by a user, then the light modulation module 4 is used for adjusting and shaping the light beams to form a depth-adjustable long focal line illumination light beam instead of a divergent light beam of ordinary illumination, the light modulation module 4 and the directional light source 3 are overlapped in a functional effect to form a display illumination with adjustable directional depth, so that the light beams are suddenly stopped at a certain distance from the display module, meanwhile, the nearby area is not influenced, then image information loaded into the display module 5 is carried, the user can realize viewing in a customized visual space 41, and the user cannot view the image information loaded in the display module 5 outside the customized visual space 41, does not receive the illumination light beam, and does not display noise.
In the present embodiment, the directional light source 3 is a coherent light source or a noncoherent light source. The directional light source 3 adopts a coherent light source and a non-coherent light source, which have advantages and disadvantages, the coherent light source can form special interference fringes on the microcosmic aspect, has special properties of no diffraction and self-healing, and the non-coherent light source does not have some microcosmic characteristics of the coherent light source, but maintains the macroscopic depth regulation characteristic.
In this embodiment, the light modulation module 4 is a coated conical lens, and the schematic structure is shown in fig. 2, and the coated conical lens is a special surface lens, and the lens with the surface structure can form a light field with high concentration of energy and rapid divergence of energy of the invisible space view area 51 in the customized visible space view area 41 as the light modulation module 4, so that no illumination interference is caused to the nearby user, and the lens is a green high environment-friendly illumination mode. The size of the directional light source 3 is generally smaller than that of the coated conical lens, and if the size of the directional light source 3 is larger than that of the coated conical lens, an aperture stop is added between the directional light source 3 and the coated conical lens to limit the size of the illumination beam emitted by the directional light source 3.
Referring to fig. 2, the film coated conical lens absorbs the incident central beam of the illuminating beam by setting a beam absorption radius (black in the inner ring) to form a central hollow dark field, and the unabsorbed annular illuminating beam exits to form a concentrated illuminating beam view field of the visual space view area 41, wherein the beam absorption radius is regulated and controlled at the position of a beam focal line formed in the longitudinal direction of the visual space view area 41, and the illuminating beam of the visual space view area is regulated and controlled in the longitudinal direction; the main function of the light modulation module 4 is to regulate, control and reshape the light beam distribution of the light beam emitted by the directional light source 3, and the main parameter is the bottom surface angle, namely the characteristic angleAnd the characteristic radius is calculated according to radian system in calculation, and is two different values r 1 And r 2 And generally r 1 ＞r 2 At 0 < r 1 ＜r 2 An absorption surface (M in the black area around the center of the circle in fig. 2) is designed to absorb the incident central beam to form a central hollow dark field, while the unabsorbed annular beam forms a bright field distribution in the viewing area 41.
The longitudinal depth range of the view region of the viewing space satisfies the expression:
wherein Z is fl Represents the longitudinal depth range on the central axis of the visual zone of the visual space, r 1 And r 2 The outer radius and the beam absorption radius of the coated conical lens are shown in FIG. 3, r 1 ＞r 2 ，n a The refractive index of the coated conical lens is shown,the characteristic angle of the coated conical lens is radian.
The customization of the visual space view area 41 complements the profile shaping characteristic of the light modulation module 4, the diameter characteristic of the coated conical lens adopted by the light modulation module 4 determines the longitudinal display depth of the illumination light beam of the visual space view area 41, and also determines the profile shaping form of the initial illumination light beam, the directional light source 3 can be composed of a common LED backlight, the light ray profile diagram which does not involve the profile shaping of the coated conical lens for the light beam emitted by the same directional light source 3 is shown in fig. 4, while the illumination light beam profile diagram after the distribution regulation shaping of the light modulation module 4 of the depth regulation directional illumination display system provided by the embodiment is shown in fig. 5, and the longitudinal depth range Z on the central axis of the visual space view area fl In this case, the maximum beam linear density of the light source profile can be increased by an order of magnitude compared to that before being shaped, which also enables viewing by a user in the customized viewing zone 41, whereas in the non-customized zone, the user cannot view the image information loaded in the display module and does not receive the illumination beamThe absorption radius regulates the focal line position formed in the longitudinal direction of the visual area of the visual space, and the illumination beam of the visual area of the visual space is regulated in the longitudinal direction.
In this embodiment, the display module 5 adopts an optical film layer, and the display image is customized on the optical film layer or the image is displayed by adopting an LCD screen to change in real time, so that the image loaded by the display module 5 does not affect the macroscopic depth characteristic of the illumination beam emitted after the distribution regulation and shaping. The scattering properties of the optical film are very small or negligible and static image information can be directly imprinted on the optical display film for static display.
Example 2
Referring to fig. 6, a depth-control directional illumination display method is also provided in this embodiment, and the method is implemented based on the depth-control directional illumination display system described in embodiment 1, and includes the following steps:
s1, positioning the positions of the eyes of a user positioned in a visual area of a visual space by utilizing a human eye tracking module 2, and transmitting the information of the positions of the eyes of the user to a central processing unit 1; at this time, the default user's eyes are located in the visual area of the visual space.
S2, the central processing unit 1 analyzes the space angle and depth of the eyes of the user according to the eye position information to obtain the viewing direction of the eyes of the user, and guides the directional light source 3 to emit illumination light beams directionally according to the viewing direction of the eyes of the user;
s3, transmitting the directional illumination light beams to the light modulation module 4, carrying out distribution regulation and shaping on the directional illumination light beams by the light modulation module 4, emitting the illumination light beams after the distribution regulation and shaping, entering the display module 5, carrying image information loaded into the display module 5, and then entering a visible space view area;
and S4, the user views the image displayed by the display module 5 in the visual area of the visual space.
Preferably, the visual space area in step S1 is customized in advance according to parameters of the light modulation module 4, where the light modulation module 4 is a coated conical lens, and the parameters include: outer radius r 1 Beam absorption radius r 2 Refractive index n a Angle of featuresThe longitudinal depth range of the customized view volume region satisfies the expression:
wherein Z is fl Representing the longitudinal depth range on the central axis of the visual zone of the visual space; the transverse range of the customized visible space visual area is determined by the transverse range of the emergent light field of the illumination light beam after the light modulation module is distributed, regulated and shaped. And when the positions of the eyes of the user are out of the monitoring range of the human eye tracking module, the depth regulation and control directional illumination display is finished.
Example 3
In this embodiment, in combination with the system proposed in embodiment 1 and the method proposed in embodiment 2, the eyes of the user are replaced by CCD cameras for simulation, and a normalized light energy test experiment is performed, where the directional light source 3 adopts a coherent light source, and a white laser light source can be formed by combining light based on the principle of proportioning RGB three primary colors, such as the following wavelengths: red light (R) at 700.0nm, green light (G) at 546.1nm and blue light (B) at 435.8nm, which correspond to the RGB three primary color flux ratios: the three primary colors of white light (E) have a luminous flux ratio of 1:4.5907:0.0601, or in general, other illumination light colors required by proportioning and synthesizing of the light fluxes of the three primary colors can be designed. The light modulation module 4 used in the experiment is the refractive index n a A coated conical lens of 1.46, the incidence radius of the light source 3 is 12.6mm, and the parameter r of the coated conical lens is selected 1 And r 2 The experimental illumination distances for modulated illumination were about 320mm, which were 12.6mm and 0.0001mm, respectively. Fig. 7 shows a schematic diagram of normalized light energy measurement results in a visible space view (bright area) and a non-visible space view (non-bright area), where the longitudinal depth range of the visible space view refers to the brightness range of the Z-axis and the lateral range refers to the movement range of the X-axis. From the theoretical calculation formula:
calculation of Z fl The depth range of the longitudinal direction on the central axis is about 314mm, and the result has better conformity with the result of the experimental test.
Taking display pictures at different longitudinal depths further verifies the display results of the depth regulation illumination, as shown in fig. 8, taking display experiments with CCD cameras located at 90mm, 110mm, 150mm, 300mm, 400mm and 500mm in the axial direction, and deriving from the results: 90mm, 110mm, 150mm, 300mm are realized on the Z axis of the customized viewing area 41 of the visual space in the depth-control display systemThe visual view of the picture can not be formed at the position of the invisible space visual area 51 such as 400mm and 500mm, namely, visual area display with set depth is formed, the distribution of illumination light beams can not be displayed and viewed, and the visual area display is mutually verified with the depth modulation illumination concept of the system design, namely, the system has a depth modulation function, the customized visible space visual area 41 realizes illumination, and the non-customized illumination interval 51 can not be displayed. Whereas if the light absorption surface of the light modulation module is introduced without absorbing the incident central beam, the outgoing beam focal line formed by the light modulation module 4 is regulated to start from the coated conical lens tip z=0, and if the beam absorption radius is designed, the focal line position formed by the Z axis can be regulated to start from z=100 mm, 500mm, for example.
The positional relationship depicted in the drawings is for illustrative purposes only and is not to be construed as limiting the present patent;
it is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (6)
1. A depth-controlled directional illuminated display system, comprising: the system comprises a central processing unit (1), a human eye tracking module (2), a directional light source (3), a light modulation module (4) and a display module (5); the human eye tracking module (2) is used for positioning the positions of the eyes of a user positioned in the visual space visual area, transmitting the information of the positions of the eyes of the user to the central processing unit (1), analyzing the space angles and the depths of the eyes of the user by the central processing unit (1) according to the information of the positions of the eyes to obtain the viewing directions of the eyes of the user, guiding the directional light source (3) to emit illumination light beams according to the viewing directions of the eyes of the user, transmitting the illumination light beams to the light modulation module (4), carrying out distribution regulation and shaping on the illumination light beams by the light modulation module (4), emitting the illumination light beams after the distribution regulation and shaping to the display module (5), carrying the image information loaded into the display module (5), then entering the visual space visual area, and watching the image displayed by the display module (5) in the visual space visual area by the user; the longitudinal depth range of the visual space visual area is determined by parameters of the light modulation module (4), and the transverse range is determined by the transverse range of the emergent light field of the illumination light beam after the distribution regulation and control shaping of the light modulation module (4);
the light modulation module (4) is a film-coated conical lens, and the size of the directional light source (3) is smaller than that of the film-coated conical lens;
the film-covered conical lens absorbs an incident central beam of the illuminating beam by setting a beam absorption radius to form a central hollow dark field, a concentrated illuminating beam view field of a visual space view area is formed after the unabsorbed annular illuminating beam exits, the beam absorption radius regulates and controls the focal line position formed in the longitudinal direction of the visual space view area, and the illuminating beam of the visual space view area is regulated and controlled in the longitudinal direction; the longitudinal depth range of the view region of the viewing space satisfies the expression:
wherein,representing the longitudinal depth range on the central axis of the viewing zone of the viewing space, < >>And->The outer radius and the light beam absorption radius of the coated conical lens are respectively +.>＞/>，/>Representing the refractive index of the coated conical lens +.>The characteristic angle of the coated conical lens is radian.
2. A depth-modulated directional illumination display system according to claim 1, characterized in that the directional light source (3) is a coherent light source or a non-coherent light source.
3. The depth-controlled directional illumination display system according to claim 1, wherein if the size of the directional light source (3) is larger than the size of the coated conical lens, an aperture stop or equivalent element is added between the directional light source (3) and the coated conical lens for restricting the size of the directional light source.
4. The depth-controlled directional illumination display system according to claim 1, wherein the display module (5) adopts an optical film layer, a display image is customized on the optical film layer or an LCD screen is adopted to change the image display in real time, and the image loaded by the display module (5) does not affect the macroscopic depth characteristic of the illumination beam emitted after the distribution control shaping.
5. The depth regulation directional illumination display method is characterized by being realized based on a depth regulation directional illumination display system and comprises the following steps of:
s1, positioning the positions of the eyes of a user positioned in a visual space visual area by using a human eye tracking module (2), and transmitting the information of the positions of the eyes of the user to a central processing unit (1);
the visual space view area in the step S1 is customized in advance according to parameters of a light modulation module (4), the light modulation module (4) is a tectorial membrane conical lens, and the parameters comprise: outer radiusBeam absorption radius->Refractive index->Characteristic angle->The method comprises the steps of carrying out a first treatment on the surface of the The longitudinal depth range of the customized view volume region satisfies the expression:
wherein,representing the longitudinal depth range on the central axis of the visual zone of the visual space; the transverse range of the customized visible space view area is determined by the transverse range of the emergent light field of the illumination light beam after the light modulation module (4) is distributed, regulated and shaped;
s2, the central processing unit (1) analyzes the space angle and depth of the eyes of the user according to the eye position information to obtain the viewing direction of the eyes of the user, and guides the directional light source (3) to emit the illumination light beam directionally according to the viewing direction of the eyes of the user;
s3, transmitting the directional illumination light beams to a light modulation module (4), carrying out distribution regulation and shaping on the directional illumination light beams by the light modulation module (4), emitting the illumination light beams after the distribution regulation and shaping, entering a display module (5), carrying image information loaded into the display module (5), and then entering a visible space view area;
s4, the user views the image displayed by the display module (5) in the visual area of the visual space.
6. The depth-controlled directional illumination display method according to claim 5, wherein the depth-controlled directional illumination display ends when the positions of both eyes of the user are out of the monitoring range of the human eye tracking module (2).
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