WO2019242325A1

WO2019242325A1 - Display device

Info

Publication number: WO2019242325A1
Application number: PCT/CN2019/076651
Authority: WO
Inventors: 余新; 胡飞; 李屹
Original assignee: 深圳光峰科技股份有限公司
Priority date: 2018-06-21
Filing date: 2019-03-01
Publication date: 2019-12-26
Also published as: CN110636270B; CN110636270A

Abstract

A display device, comprising a light source apparatus, an optical processing assembly, a controller, and a spatial light modulator, wherein: the light source apparatus comprises a light source array formed by a plurality of light sources; the optical processing assembly comprises a shaping assembly and a soft light assembly that are sequentially arranged on an optical path between the light source array and the spatial light modulator, the shaping assembly comprises a shaping element array formed by a plurality of shaping elements, and the spacing between every two adjacent shaping elements being 5%-50% the size of the shaping elements; and the controller is electrically connected to the light source apparatus and the spatial light modulator, is used for controlling the turning on/off and the illumination brightness of each light source, and controls the spatial light modulator to modulate light, which may achieve a higher contrast and higher light efficiency.

Description

display screen

Technical field

The present invention relates to the field of display technology, and in particular, to a display device.

Background technique

Existing display devices mainly use two spatial light modulators to control the light emitted by the light source to achieve a high dynamic range display effect. However, display devices that currently use two spatial light modulators have added a spatial light modulation. The device generally has a problem of low light efficiency, and its light efficiency is about 50% of that of ordinary display devices, which easily causes display devices to not easily achieve higher peak brightness. Another display device uses a dynamic aperture technology to achieve a high dynamic range display effect. The display device dynamically adjusts the size of the aperture to achieve dynamic contrast through analysis of the screen. However, the display device is made by reducing the aperture. Way to achieve, so can not achieve higher contrast.

Summary of the Invention

In view of this, the present invention provides a display device capable of achieving higher contrast and higher light efficiency.

A display device includes a light source device, an optical processing component, a controller, and a spatial light modulator, wherein the light source device includes a light source array formed by a plurality of light sources, and each light source is configured to emit a light beam; The optical processing component includes a shaping component and a soft light component which are sequentially arranged on an optical path between the light source array and the spatial light modulator. The shaping component includes a shaping element array formed by a plurality of shaping elements. The spacing between two adjacent shaping elements is 5% -50% of the size of the shaping element. Multiple light beams emitted from the light source array are shaped by the shaping element array and emitted from the shaping element array. The light emitted from the shaping element array is input to the soft light component to form a light spot with a fixed interval, and the soft light component diffuses the light spot and exits; the controller, the light source device, and the light source device. The spatial light modulator is electrically connected to control the on / off and light emission brightness of each light source, and control the spatial light modulator to modulate light

Compared with the prior art, in the display device of the present invention, since only one spatial light modulator is used to achieve a high dynamic range display effect, the low light efficiency caused by the existing two spatial light modulators is avoided. Problem, and the distance between two adjacent shaping elements is 5% -50% of the size of the shaping elements, which avoids the space between adjacent square rods caused by the spacing between adjacent shaping elements being too small. The remaining area is too small, which is difficult to overcome the errors caused by the installation and manufacturing tolerances, which causes the picture displayed by the display device to be distorted, and avoids the adjacent rectangular light spots caused by the space between adjacent shaping elements being too large. The transition part needs a large diffusion angle to overlap, so that a dark area appears in the combination area of four adjacent light spots, and it is difficult to achieve a uniform illumination light field, thereby easily realizing a high-contrast display screen.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a block diagram of a display device according to a preferred embodiment of the present invention.

FIG. 2 is a detailed structural diagram of a first embodiment of the display device shown in FIG. 1.

3 is a schematic diagram of a light spot projected on an optical element after the light beam emitted by the light source device is shaped by the shaping component of the display device shown in FIG. 2.

4 is a schematic diagram of a light field distribution after the light beam emitted by the light source device is shaped and softened by the soft light component of the display device shown in FIG. 2.

5A-5C are schematic diagrams of light field distribution when the light source is fully turned on under different numbers of light spots.

FIG. 6 is a detailed structural diagram of a second embodiment of the display device shown in FIG. 1.

FIG. 7 is a detailed structural diagram of a third embodiment of the display device shown in FIG. 1.

FIG. 8 is a detailed structural diagram of a fourth embodiment of the display device shown in FIG. 1.

FIG. 9 is a detailed structural diagram of a fifth embodiment of the display device shown in FIG. 1.

FIG. 10 is a detailed structural diagram of a sixth embodiment of the display device shown in FIG. 1.

FIG. 11 is a detailed structural diagram of a seventh embodiment of the display device shown in FIG. 1.

FIG. 12 is a detailed structural diagram of an eighth embodiment of the display device shown in FIG. 1.

Explanation of main component symbols

Display equipment

Light source device 10

Optical processing components

Controllers 30

Spatial light modulator 40

The lens 50

First

relay lens group

201, 601, 701, 801

Wavelength conversion device

202, 604, 704, 804, 904, 1004, 1106, 1206

Second

relay lens group

203, 603, 703, 803, 903, 1003, 1103, 1203

Shaping components

204, 602, 706, 806, 902, 1002, 1102, 1202

Soft light components: 205, 605, 707, 807, 905, 1005, 1107, 1207

Diffusers 206, 606, 708, 808

Optical relay devices

207, 607, 709, 809, 906, 1006, 1108, 1208

Light guide element

702, 802, 1104, 1204

Third

relay lens group

705, 805, 1105, 1205

Output fiber array

901, 1101

Optical fiber combiner

array

1001, 1201

The following specific embodiments will further explain the present invention in combination with the above drawings.

detailed description

In order to more clearly understand the foregoing objects, features, and advantages of the present invention, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

In the following description, many specific details are set forth in order to fully understand the present invention. The described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the present invention is only for the purpose of describing specific embodiments, and is not intended to limit the present invention.

Please refer to FIGS. 1-2. FIG. 1 is a block diagram of a display device according to a preferred embodiment of the present invention, and FIG. 2 is a schematic diagram of a specific structure of a first embodiment of a display device according to the present invention. The display device 1 includes a light source device 10, an optical processing module 20, a controller 30, a spatial light modulator 40, and a lens 50. The optical processing component 20 is configured to adjust each light beam from the light source device 10 to form a uniform illumination light field on the spatial light modulator 40. The controller 30 is electrically connected to the light source device 10 and the spatial light modulator 40, and is configured to control each light source of the light source device 10 on / off and light emission brightness, and control the spatial light modulator 40. The light beam projected on the spatial light modulator 40 is modulated to obtain image light. The lens 50 is configured to project a display screen according to the image light.

The light source device 10 includes a light source array formed by a plurality of light sources, and the light source array is arranged in an m × n array according to an aspect ratio of a projection screen. Each light source in the light source array is used to emit a light beam. Each light source is a laser, a light emitting diode, or an organic light emitting diode. In this embodiment, each light source is a laser. The plurality of lasers are used to emit a monochromatic Gaussian beam, and the energy distribution of the beam emitted by each laser satisfies a Gaussian distribution. The laser may be a blue laser that generates a dominant wavelength of 445 nm, or a laser that generates excitation light of other wavelengths. In this embodiment, the laser is a blue laser with a dominant wavelength of 445 nm. Each light source has independently controllable light output. In this embodiment, each light source may be controlled by the controller 30 to be in an on state or an off state or emit an excitation light beam with a different brightness.

The optical processing component 20 includes a first relay lens group 201, a wavelength conversion device 202, a second relay lens group 203, a shaping component 204, and a soft light component 205 in this order along the emission direction of the optical path. The light beam emitted from the light source device 10 is imaged on the wavelength conversion device 202 through the first relay lens group 201. Further, a plurality of light beams emitted by the light source array are formed on a light incident surface of the wavelength conversion device 202 Discretized light spot. The wavelength conversion device 202 at least partially converts the light beam into visible light of another wavelength, and emits the visible light of the other wavelength. The light beam emitted from the wavelength conversion device 202 is imaged on the shaping component 204 through the second relay lens group 203. The shaping component 204 shapes the light beam into a light beam with a fixed interval, and emits the light beam from an exit surface of the shaping element array. The light beam emitted from the shaping element array is input to the soft light component to form light spots with a fixed interval, and the soft light component diffuses the light spots and exits. specifically:

The first relay lens group 201 is composed of one or more convex lenses and / or one or more concave lenses. In this embodiment, the first relay lens group 201 is composed of two plano-convex lenses.

In this embodiment, the wavelength conversion device 202 is a transmission-type wavelength conversion device. The wavelength conversion device 202 absorbs at least part of the light emitted by the light source array, and emits and receives laser light. The wavelength conversion device 202 includes a substrate and a wavelength conversion layer. The substrate is used to carry the wavelength conversion layer, and the wavelength conversion layer may be a phosphor capable of generating broad-spectrum light after being excited. The wavelength conversion layer may be divided into one or more sections. The plurality of sections may specifically be three sections, four sections, six sections, and the like. Each segment can be provided with a phosphor, and different phosphors can be used to convert incident light into visible light of different wavelengths. The three-segment wavelength conversion layer can be used to convert blue light into red, green, and blue visible light, and the four-segment wavelength conversion layer can be used to convert blue excitation light to red and green. , Blue, and white visible light, the six-segment wavelength conversion layer can be used to convert blue light into red, green, blue, red, green, and blue visible light. In this embodiment, the spatial brightness distribution of the light beam emitted by each light source only changes the spatial grayscale distribution of the image light, and does not change the color gamut spatial distribution of the image light. Therefore, the intensity distribution of the three primary color spaces is guaranteed to remain unchanged, thereby The color uniformity of the projected picture is guaranteed. Wherein, when the substrate is circular, the wavelength conversion layer is located on the periphery of the substrate and is distributed in a circular shape. When the substrate is rectangular, the wavelength conversion layer is located on the surface of the substrate and formed into a circular shape. Banded distribution. The wavelength conversion device 202 may be driven to perform a circular motion, a horizontal motion, or a vertical motion, so that a light spot formed on the wavelength conversion layer acts on the wavelength conversion layer along a predetermined path, and is converted into visible light of different wavelengths.

In this embodiment, the second relay lens group 203 is composed of one or more convex lenses and / or one or more concave lenses. In this embodiment, the second relay lens group 203 is composed of two concave lenses and one convex lens.

In this embodiment, the first relay lens group 201, the wavelength conversion device 202, and the second relay lens group 203 do not change the distribution shape of the light spot projected thereon. After the first relay lens group 201, the wavelength conversion device 202, and the second relay lens group 203, the shape of the light spot projected by the light source device 10 on the shaping component 204 is oval or circular. Gaussian spot. The light beam emitted from the wavelength conversion device 202 enters the shaping component 204, and the shaping component 204 shapes an elliptical or circular Gaussian light spot projected thereon into a square light spot with a fixed interval (see FIG. 3). (Shown), and exit through the exit surface of the shaping component 204. The shaping assembly 204 includes a shaping element array formed by a plurality of shaping elements. The spacing between every two adjacent shaping elements is between 5% and 50% of the size of the shaping element. The shaping element array may be a square rod array or a waveguide array. In this embodiment, the shaping element array is a square rod array. The square rod array is an m × n array. The square rods in the square rod array correspond one-to-one with the light sources in the light source array. In this embodiment, the distance between each two adjacent square bars is 5% -50% of the length or width of the end face of the square bar, so that the square bar array can achieve better shaping effects and is easily implemented. Uniform illumination light field. If the distance between adjacent square bars is too small, it is difficult to overcome the errors caused by installation and manufacturing tolerances because the area left between adjacent square bars is too small, causing the picture displayed by the display device to be distorted. If the distance between adjacent square bars is too large, the transition area of adjacent rectangular light spots needs a large diffusion angle to overlap, making the combined area of the four adjacent light spots appear dark and it is difficult to achieve a uniform illumination light field. .

In this embodiment, the soft light component 205 includes a diffuser 206 and an optical relay device 207 that are sequentially disposed on the optical path between the shaping component 204 and the spatial light modulator 40. The light beam emitted from the shaping element array is input to the diffuser 206 to form a square light spot with a fixed interval. The diffuser 206 softens the square light spot and superimposes each other in adjacent areas to form a uniform illumination light field ( (As shown in FIG. 4) and emitted to the optical relay device 207. The optical relay device 207 images the light beam emitted from the diffuser 206 to the spatial light modulator 40. Therefore, after passing through the soft light component 205, the light projected on the spatial light modulator 40 is uniform, and the image quality displayed by the display device is improved. The optical relay device 207 is composed of one or more convex lenses and / or one or more concave lenses. In this embodiment, the optical relay device 207 is composed of two concave lenses and one convex lens. In another embodiment, the position of the exit surface of the diffuser 206 is far from the focal point of the optical relay device 207, and the light beam emitted from the exit surface of the diffuser 206 is evenly projected on the optical relay device. 207, thereby making the light imaged on the spatial light modulator 40 more uniform, and improving the image quality displayed by the display device. In other embodiments, the soft light component 205 includes the optical relay device 207, and the exit surface of the shaping component 204 is located far from the focal point of the optical relay device 207, and exits from the shaping component 204. The light beam emitted from the surface is uniformly projected on the optical relay device 207, so that the light imaged on the spatial light modulator 40 is uniform.

The controller 30 is configured to receive an original image data of an image to be displayed, generate a light source control signal according to the original image data, and control each light source of the light source device 10 to be turned on / off according to the light source control signal. And the luminous brightness of each light source, predicting the illuminance distribution of the spatial light modulator 40 according to the on or off of each light source and the luminous brightness of each light source, and generating compensation according to the illuminance division and the original image data control signal. The spatial light modulator 40 modulates the brightness corresponding to the light beam emitted by the light source device 10 according to the compensation control signal to obtain image light. It can be understood that the spatial light modulator 631 may be a DMD spatial light modulator, an Lcos spatial light modulator, or an LCD spatial light modulator.

In the present invention, the distance between each two adjacent square bars is 5% -50% of the length or width of the end face of the square bar, so that the square bar array can achieve better shaping effects and easily achieve uniform lighting. Light field, which facilitates high-contrast display. Please refer to FIGS. 5A-5C at the same time. FIGS. 5A-5C are schematic diagrams of light field distribution when the light source is fully turned on under different numbers of light spots. In this embodiment, when a light beam is projected on the wavelength conversion device 202, the impact response of the wavelength conversion device 202 is a Gaussian function, so the brightness distribution of the light spot after passing through the wavelength conversion device 202 is projected on Convolution of the brightness distribution of the light spot on the wavelength conversion device 202 and the impact response function of the wavelength conversion device 202. 5A-5C show that the variance of the shock response function of the wavelength conversion device is 0.2 mm, that is, the half-width of the spot width is 0.2 mm, and when the total spot size on the wavelength conversion device is 4 * 3 mm, the light spot on the wavelength conversion device is different. When the light source is fully turned on under the number of divisions, the light field distribution of the light spot after passing through the wavelength conversion device. When the number of light spot partitions is an 8 × 6 array, the light spot pitch is 0.25 mm, which is larger than the diffusion half width of the wavelength conversion device. The light field distribution after the light spot passes through the wavelength conversion device is shown in FIG. 5A. When the number of light spot partitions is 12 For a × 9 array, the spot spacing is 0.16mm, and the light field distribution after the spot passes through the wavelength conversion device is shown in FIG. 5B. When the number of spot partitions is 16 × 12, the spot spacing is 0.125mm, and the spot passes through the The light field distribution after the wavelength conversion device is shown in FIG. 5C. It can be known from FIGS. 5A-5C that when the distance between the light spots and the half-width of the light spots are less than 50%, the light field distribution of the light spots is uniform. Therefore, when the distance between every two adjacent square bars is 5% -50% of the length or width of the end face of the square bar, the display device realizes a high-contrast display screen.

In addition, the present invention uses a single light source to obtain a uniform illumination light field, which avoids the difficulty of superimposing multiple light sources during shaping and makes it difficult to obtain a uniform illumination light field; the wavelength conversion device 202 is used to convert the monochromatic light emitted by the light source. The excitation light beam is converted into a multi-color receiving laser to achieve color display. By using a laser as a light source, the spatial brightness distribution of the laser emitted by the laser only changes the spatial grayscale distribution of the image light, and does not change the image light. The color gamut distribution of the color space ensures the intensity distribution of the three primary color spaces is unchanged, thereby ensuring the uniformity of the color of the projection screen; the beams emitted by the light source device 10 are shaped to have a fixed interval through a one-to-one correspondence between the square bar and the light source Light beam; the square light spot projected on the soft light component 205 after passing through the shaping component 204 is diffused by the soft light component 205 and superimposed on adjacent areas to form a uniform illumination light field; by using only one piece of spatial light modulator 40, to avoid the problem of low light efficiency caused by the use of two spatial light modulators.

Please refer to FIG. 6, which is a schematic diagram of a specific structure of a second embodiment of a display device of the present invention. The display device of the second embodiment is substantially the same as the display device of the first embodiment shown in FIG. 2. The optical processing component 20 includes a first relay lens group 601, a shaping component 602, a second relay lens group 603, and a wavelength. Conversion device 604 and soft light component 605, which includes diffuser 606 and optical relay device 607, and the structure and positional relationship of each element included in the optical processing component 20 of the second embodiment is similar to that of the first embodiment The structure and positional relationship of the components included in the optical processing module 20 are similar, except that the positions of the wavelength conversion device 604 and the shaping component 602 are different from those of the first embodiment. details as follows:

The shaping component 602 is disposed on an optical path between the first relay lens group 601 and the second relay lens group 603. In this embodiment, the first relay lens group 601 does not change the distribution shape of the light spot projected thereon. Therefore, after passing through the first relay lens group 601, the light source device 10 projects on the The shape of the light spot on the shaping component 602 is an elliptical or circular light spot with a Gaussian distribution. The shaping component 602 shapes an elliptical or circular spot with a Gaussian distribution projected thereon into a square spot with a fixed interval and emits from the exit surface thereof. The wavelength conversion device 604 is disposed on an optical path between the second relay lens group 603 and the soft light component 605. Further, the multiple beams of light emitted by the shaping component 602 form discrete light spots on the light incident surface of the wavelength conversion device 604. The light beam emitted from the exit surface of the shaping component 602 is imaged on the wavelength conversion device 604 through the second relay lens group 603, and the wavelength conversion device 604 converts and emits visible light of another wavelength to the flexible light. Light component 605.

Please refer to FIG. 7, which is a detailed structural diagram of a third embodiment of a display device of the present invention. The display device of the third embodiment is substantially the same as the display device of the first embodiment shown in FIG. 2. The optical processing module 20 includes a first relay lens group 701, a light guide element 702, a second relay lens group 703, The wavelength conversion device 704, the third relay lens group 705, the shaping component 706, and the soft light component 707. The soft light component 707 includes a diffuser 708 and an optical relay device 709. The optical processing component 20 of the third embodiment includes The structure and positional relationship of the components of the device are similar to the structure and positional relationship of the components included in the optical processing module 20 of the first embodiment, except that the structure of the light guide element 702 and the wavelength conversion device 704 is The positions of the three relay lens groups 705, the second relay lens group 703, and the wavelength conversion device 704 are different from those of the first embodiment. details as follows:

The optical processing module 20 further includes a light guide element 702 and a third relay lens group 705. The light guide element 702 is disposed on an optical path between the first relay lens group 701 and the second relay lens group 703. The light guide element 702 includes a filter having a center diaphragm and an edge diaphragm. The center diaphragm and the edge diaphragm may be integral diaphragms or separate diaphragms. The central film of the filter transmits the light beam emitted by the light source, and the edge film of the filter is a reflective film or the edge film reflects visible light converted by the wavelength conversion device 704. In this embodiment, the central film of the filter is blue-transparent and yellow, and the edge film of the filter is a reflective film. The third relay lens group 705 is disposed on an optical path between the light guiding element 702 and the shaping component 706. In this embodiment, the third relay lens group 705 is composed of one or more convex lenses and / or one or more concave lenses. In this embodiment, the third relay lens group 705 is composed of a convex lens. The wavelength conversion device 704 is a reflection-type wavelength conversion device. The multiple light beams emitted from the light source array pass through the first relay lens group 701, pass through the light guide element 702, and enter the wavelength conversion device 704 through the second relay lens group 703. The wavelength The conversion device 704 converts and emits visible light of another wavelength, and the light beam emitted from the wavelength conversion device 704 is reflected by the light guide element 702 through the third relay lens group 705 through the second relay lens group 703 To the shaping component 706.

Please refer to FIG. 8, which is a detailed structural diagram of a fourth embodiment of a display device of the present invention. The display device of the fourth embodiment is substantially the same as the display device of the third embodiment shown in FIG. 7. The optical processing module 20 includes a first relay lens group 801, a light guide element 802, a second relay lens group 803, The wavelength conversion device 804, the third relay lens group 805, the shaping component 806, and the soft light component 807. The soft light component 807 includes a diffuser 808 and an optical relay device 809. The optical processing component 20 of the fourth embodiment includes The structure and positional relationship of the components of the device are similar to the structure and positional relationship of the components included in the optical processing module 20 of the third embodiment, with the difference being that the positions of the shaping component 806 and the third relay lens group 805 are It is different from the third embodiment. details as follows:

The shaping component 806 and the third relay lens group 805 are sequentially disposed on an optical path between the first relay lens group 801 and the light guide element 802. In this embodiment, the first relay lens group 801 does not change the distribution shape of the light spot projected thereon. Therefore, after passing through the first relay lens group 801, the light source device 10 projects on the The shape of the light spot on the shaping component 806 is an elliptical or circular light spot with a Gaussian distribution. The light beam emitted from the light source device 10 enters the shaping component 806 through the first relay lens group 801. The shaping component 806 shapes an elliptical or circular spot with a Gaussian distribution projected thereon into a square spot with a fixed interval and exits through the third relay lens group 805 through the third relay lens group 805. Light guide element 802.

Please refer to FIG. 9, which is a detailed structural diagram of a fifth embodiment of a display device of the present invention. The display device of the fifth embodiment is substantially the same as the display device of the first embodiment shown in FIG. 2. The optical processing module 20 includes an output fiber array 901, a shaping module 902, a second relay lens group 903, and a wavelength conversion device 904. And a soft light component 905, which includes an optical relay device 906, and the structure and positional relationship of the components included in the optical processing component 20 of the fifth embodiment are included in the optical processing component 20 of the first embodiment The structure and positional relationship of the components are similar, except that the first relay lens group of the first embodiment is omitted, the output optical fiber array 901 of the fifth embodiment, the structure of the shaping assembly 902, and the first The structure of the second relay lens group 903, the structure of the soft light component 905, and the positions of the wavelength conversion device 904 and the shaping component 902 are different from those of the first embodiment. specifically:

In this embodiment, the first relay lens group is omitted. The optical processing module 20 further includes an output fiber array 901 formed by a plurality of output fibers. The output fiber array 901 is disposed on an optical path between the light source device 10 and the shaping component 902. The output fibers in the output fiber array 901 correspond to the light sources in the light source array on a one-to-one basis. Each output fiber is coupled to a light source. Each output fiber includes a homogenizing fiber. The homogenizing fiber is a square fiber, a matrix fiber, or an octagonal row fiber. The homogenizing optical fiber may be a circular cladding fiber or a square cladding fiber. In this embodiment, each output optical fiber further includes a core-core optical fiber, one end of the core-core optical fiber is coupled to the light source, and the other end is fused to the homogenized optical fiber. In other embodiments, each output fiber is a homogenizing fiber. The light beam emitted from the light source is coupled into one end of the output fiber, transmitted in the output fiber, and emitted from an end surface of the homogenizing fiber. Wherein, because the excitation light beam generated by the light source is transmitted through the output fiber, the energy loss of the excitation light beam during transmission can be reduced. Moreover, since each output optical fiber includes a homogenizing optical fiber, a light spot formed by projecting a light beam emitted from the homogenizing optical fiber on an optical element can be square, thereby avoiding the existing ordinary single-mode or multimode optical fiber due to the core diameter. Due to the circular shape, the transition portion of the adjacent circular light spots needs to be diffused to a large size to overlap, so that there is a dark area in the light spot combination area and it is difficult to achieve uniform illumination.

The shaping component 902 includes a fiber optic ferrule. An array of ferrule holes is formed on the optical fiber ferrule. The ferrule holes of the optical fiber ferrule run parallel and mutually parallel. In this embodiment, the ferrule hole array is an m × n array. Each ferrule hole of the optical fiber ferrule is used to receive a homogenized optical fiber. That is, the ferrule holes of the optical fiber ferrule correspond one-to-one with the light sources in the light source array. The homogenized optical fiber is fixed with a ferrule hole accommodated in the optical fiber ferrule by using a heat curing or light curing glue. In this embodiment, the shape of the ferrule hole of the optical fiber ferrule matches the outer diameter of the homogenized optical fiber. The spacing between every two adjacent ferrule holes is 5% -50% of the diameter of the ferrule hole, or 5% -50% of the length or width of the end face of the ferrule hole, so that the shaping component Can achieve better plastic effects. If the distance between adjacent ferrule holes is too small, it is difficult to overcome the error caused by the installation and manufacturing tolerances because the area left between adjacent ferrule holes is too small, so that the screen displayed by the display device 1 Distortion occurs. If the distance between adjacent ferrule holes is too large, the transition portions of adjacent light spots need a large diffusion angle to overlap, so that the dark areas of the combined areas of the four adjacent light spots are difficult to achieve uniform illumination. Therefore, a plurality of light beams emitted from the light source array are shaped into light beams with a fixed interval by the shaping element array. The end surface of the homogenized optical fiber exiting light is flush with the end surface of the fiber ferrule at the end far from the homogenized optical fiber insertion, and both are smooth and neat, so as to facilitate the exit of the light beam in the output optical fiber.

The second relay lens group 903 is composed of one or more convex lenses and / or one or more concave lenses. In this embodiment, the second relay lens group 903 is composed of a convex lens.

The wavelength conversion device 904 is disposed on an optical path between the second relay lens group 903 and the soft light component 905. The light emitted from the homogenizing optical fiber enters the wavelength conversion device 904 through the second relay lens group 903. The wavelength conversion device 904 converts and emits visible light of another wavelength to the soft light component 905.

The soft light component 905 is disposed on an optical path between the wavelength conversion device 904 and the spatial light modulator 40. In this embodiment, the soft light component 905 includes an optical relay device 906. The optical relay device 906 is composed of one or more convex lenses and / or one or more concave lenses. In this embodiment, the optical relay device 906 is composed of two concave lenses and one convex lens. In another embodiment, the soft light component 905 includes a diffuser and the optical relay device 906 which are sequentially disposed on an optical path between the wavelength conversion device 904 and the spatial light modulator 40. The light beam emitted from the wavelength conversion device 904 is input to the diffuser to form a square light spot with a fixed interval. The diffuser softens the square light spot and superimposes each other in adjacent areas to form a uniform illumination light field and emits the light. To the optical relay device 906. The optical relay device 906 images the light beam emitted from the diffuser to the spatial light modulator 40. In other embodiments, the exit surface of the diffuser is located far from the focal point of the optical relay device 906, and the light beam emitted from the exit surface of the diffuser is uniformly projected on the optical relay device 906.

Please refer to FIG. 10, which is a schematic diagram of a specific structure of a sixth embodiment of a display device of the present invention. The display device of the sixth embodiment is substantially the same as the display device of the fifth embodiment shown in FIG. 9. The optical processing module 20 includes an optical fiber combiner array 1001, a shaping module 1002, a second relay lens group 1003, and a wavelength conversion. Device 1004 and soft light component 1005, which includes optical relay device 1006, and the structure and positional relationship of each element included in the optical processing component 20 of the sixth embodiment is similar to that of the optical processing component 20 of the first embodiment The structure and positional relationship of the included components are similar, except that the output optical fiber array of the fifth embodiment is omitted, and the optical fiber combiner array 1001 and the light source device of the sixth embodiment are different from the fifth embodiment. . specifically:

In this embodiment, the output fiber is omitted. The optical processing module 20 further includes an optical fiber combiner array 1001 formed by a plurality of optical fiber combiners. Each optical fiber combiner in the optical fiber combiner array 1001 includes a plurality of input fibers and one output fiber. The input optical fibers included in the multiple optical fiber combiners may be completely the same, some of the same or different, or different from each other. In this embodiment, each optical fiber combiner includes two input optical fibers. Each input fiber of the optical fiber combiner corresponds to a light source and is coupled to a light source, and the output fiber of the optical fiber combiner is connected to the plurality of input optical fibers, so that the excitation light beams emitted by multiple light sources can be used. Coupled into an output fiber to illuminate the same area, improving display brightness. The light beam emitted from each light source is coupled to a corresponding input fiber, propagates in the input fiber and the output fiber, and exits from an end surface of the homogenizing fiber.

In this embodiment, since the output optical fiber does not correspond to the light source one-to-one, the light source array included in the light source device 10 is not arranged in an m × n array according to the aspect ratio of the projection screen, but according to each The number of input fibers included in each optical fiber combiner is arranged so that the light beams emitted by each output fiber are arranged in an m × n array according to the aspect ratio of the projection screen. Therefore, the corresponding relationship between the ferrule hole of the optical fiber ferrule and the light source in the light source array is determined according to the number of input optical fibers included in each optical fiber combiner. For example, in this embodiment, the optical fiber ferrule The corresponding relationship between the ferrule hole and the light source in the light source array is that one ferrule hole corresponds to two light sources.

Please refer to FIG. 11, which is a detailed structural diagram of a seventh embodiment of a display device of the present invention. The display device of the seventh embodiment is substantially the same as the display device of the fifth embodiment shown in FIG. 9. The optical processing module 20 includes an output fiber array 1101, a shaping module 1102, a second relay lens group 1103, and a light guide element 1104. , A third relay lens group 1105, a wavelength conversion device 1106, and a soft light component 1107. The soft light component 1107 includes an optical relay device 1108, and a structure and a position of each element included in the optical processing component 20 of the seventh embodiment. The relationship is similar to the structure and positional relationship of the elements included in the optical processing module 20 of the fifth embodiment, except that the light guide element 1104, the third relay lens group 1105, the structure of the wavelength conversion device 1106, And the structure of the optical relay device 1108 is different from the fifth embodiment. specifically:

The optical processing module 20 further includes a light guide element 1104 and a third relay lens group 1105. The light guide element 1104 and the third relay lens group 1105 are sequentially disposed on an optical path between the second relay lens group 1103 and the wavelength conversion device 1106. The light guide element 1104 includes a filter having a center diaphragm and an edge diaphragm. The center diaphragm and the edge diaphragm may be integral diaphragms or separate diaphragms. The central film of the filter transmits the light beam emitted by the light source, and the edge film of the filter is a reflective film or the edge film reflects visible light converted by the wavelength conversion device 1106. In this embodiment, the central film of the filter is blue-transparent and yellow, and the edge film of the filter is a reflective film. The third relay lens group 1105 is composed of one or more convex lenses and / or one or more concave lenses. In this embodiment, the third relay lens group 1105 is composed of two concave lenses and one convex lens. In this embodiment, the wavelength conversion device 1106 is a reflection-type wavelength conversion device. In this embodiment, the optical relay device 1108 is composed of a convex lens.

Multiple light beams emitted from the light source device 10 are coupled into one end of the output fiber, transmitted through the output fiber, and emitted from an end surface of the homogenizing fiber. The light beam exiting from the end surface of the homogenizing optical fiber passes through the light guide element 1104 through the second relay lens group 1103, and enters the wavelength conversion device 1106 through the third relay lens group 1105. The wavelength conversion device 1106 converts and emits visible light of another wavelength. The light beam emitted from the wavelength conversion device 1106 is reflected by the light guide element 1104 to the optical relay device 1108 through the third relay lens group 1105.

Please refer to FIG. 12, which is a detailed structural diagram of an eighth embodiment of a display device of the present invention. The display device of the eighth embodiment is substantially the same as the display device of the seventh embodiment shown in FIG. 11. The optical processing module 20 includes an optical fiber combiner array 1201, a shaping module 1202, a second relay lens group 1203, and a light guide. Element 1204, a third relay lens group 1205, a wavelength conversion device 1206, and a soft light component 1207. The soft light component 1207 includes an optical relay device 1208. The structure of each element included in the optical processing component 20 of the eighth embodiment And the positional relationship are similar to the structure and positional relationship of each element included in the optical processing module 20 of the seventh embodiment, except that the output optical fiber array of the seventh embodiment is omitted, and the optical fiber combiner of the eighth embodiment is omitted. And the light source device is different from the seventh embodiment. specifically:

In this embodiment, the output fiber is omitted. The optical processing module 20 further includes an optical fiber combiner array 1201 formed by a plurality of optical fiber combiners. Each optical fiber combiner includes several input optical fibers and one output optical fiber. The input optical fibers included in the multiple optical fiber combiners may be completely the same, some of the same or different, or different from each other. In this embodiment, each optical fiber combiner includes two input optical fibers. Each input fiber of the optical fiber combiner corresponds to a light source and is coupled to a light source, and the output fiber of the optical fiber combiner is connected to the plurality of input optical fibers, so that the excitation light beams emitted by multiple light sources can be used. Coupled into an output fiber to illuminate the same area, improving display brightness. The light beam emitted from each light source is coupled to a corresponding input fiber, propagates in the input fiber and the output fiber, and exits from an end surface of the homogenizing fiber.

In this embodiment, since the output optical fiber does not correspond to the light source one-to-one, the light source array included in the light source device 10 is not arranged in an m × n array according to the aspect ratio of the projection screen, but according to each The number of input optical fibers included in each optical fiber combiner is arranged so that the light beams emitted by each output optical fiber are arranged in an m × n array according to the aspect ratio of the projection screen. Therefore, the corresponding relationship between the ferrule hole of the optical fiber ferrule and the light source in the light source array is determined according to the number of input optical fibers included in each optical fiber combiner. For example, in this embodiment, the optical fiber ferrule The corresponding relationship between the ferrule hole and the light source in the light source array is that one ferrule hole corresponds to two light sources.

It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, the embodiments are to be regarded as exemplary and non-limiting in every respect, and the scope of the present invention is defined by the appended claims rather than the above description, and therefore is intended to fall within the claims. All changes that come within the meaning and range of equivalents are encompassed by the invention. Any reference signs in the claims should not be construed as limiting the claims involved. In addition, it is obvious that the word "comprising" does not exclude other units or steps, and that the singular does not exclude the plural. Multiple units or devices stated in a device claim may also be implemented by the same unit or device through software or hardware.

The above is only an embodiment of the present invention, and thus does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the description and drawings of the present invention, or directly or indirectly applied to other related technologies The same applies to the fields of patent protection of the present invention.

Claims

A display device, characterized in that the display device includes a light source device, an optical processing component, a controller, and a spatial light modulator, wherein:

The light source device includes a light source array formed by a plurality of light sources, and each light source is configured to emit a light beam;

The optical processing component includes a shaping component and a soft light component which are sequentially arranged on an optical path between the light source array and the spatial light modulator. The shaping component includes a shaping element array formed by a plurality of shaping elements. The spacing between two adjacent shaping elements is 5% -50% of the size of the shaping element, and multiple beams emitted from the light source array are shaped by the shaping element array, and from the shape of the shaping element array. The exit surface is emitted, and the light beam emitted from the shaping element array is input to the soft light component to form light spots with a fixed interval, and the soft light component diffuses the light spots and exits;

The controller is electrically connected to the light source device and the spatial light modulator, and is configured to control on / off and light emission brightness of each light source, and control the spatial light modulator to modulate light.
The display device according to claim 1, wherein:

The shaping component includes a square rod array formed by a plurality of square rods, and a distance between adjacent square rods is 5% -50% of a length or a width of an end surface of a single square rod.
The display device according to claim 2, wherein:

The light sources in the light source array correspond to the square rods in the square rod array one-to-one.
The display device according to claim 1, wherein:

The shaping component includes an optical fiber ferrule, and a ferrule hole array formed by a plurality of ferrule holes is formed on the optical fiber ferrule, and a distance between each two adjacent ferrule holes is the diameter of the ferrule hole. 5% -50%.
The display device according to claim 4, wherein:

The optical processing module further includes an output optical fiber array located between the light source array and the optical fiber ferrule, the output optical fiber array is composed of multiple output optical fibers, each output optical fiber includes a homogenizing optical fiber, each homogenizing An optical fiber is inserted into a ferrule hole of the optical fiber ferrule, and a light beam emitted from each light source is coupled to a corresponding output optical fiber, propagates in the output optical fiber, and exits from an end surface of the homogenizing optical fiber.
The display device according to claim 4, wherein:

The optical processing module further includes an optical fiber combiner array located between the light source array and the optical fiber ferrule. The optical fiber combiner array is composed of multiple optical fiber combiners, and each optical fiber combiner includes Several input optical fibers and one output optical fiber, the output optical fiber of each optical fiber combiner is connected with the optical fiber ferrule, each output optical fiber includes a homogenizing optical fiber, and each homogenizing optical fiber is inserted into a ferrule hole of the optical fiber ferrule, The light beam emitted from each light source is coupled to a corresponding input fiber, propagates in the input fiber and the output fiber, and exits from an end surface of the homogenizing fiber.
The display device according to claim 5 or 6, wherein:

Each output optical fiber further includes a circular core diameter optical fiber, and the circular core diameter optical fiber is fused to one end of the homogenizing optical fiber.
The display device according to claim 5 or 6, wherein:

The end face of the homogenized fiber exiting light is flush with the end face of the fiber ferrule which is far from the end where the homogenized fiber is inserted.
The display device according to claim 5 or 6, wherein:

The homogenized optical fiber is fixed with a ferrule hole accommodated in the optical fiber ferrule by using a heat curing or light curing glue.
The display device according to claim 1, wherein:

The soft light component includes an optical relay device, the optical relay device is disposed on an optical path between the shaping component and the spatial light modulator, and an exit surface of the shaping component is far from the optical center. Following the focal point of the device, the light beam emitted from the exit surface of the shaping component is projected on the optical relay device to form a light spot at a fixed interval, and the optical relay device diffuses the light spot and exits.
The display device according to claim 1, wherein:

Each light source is a laser, and multiple lasers are used to emit a plurality of monochromatic excitation light beams.
The display device according to claim 1, wherein:

The optical processing component further includes a wavelength conversion device, the wavelength conversion device is disposed on an optical path between the light source array and the shaping component, the wavelength conversion device absorbs at least part of the light emitted by the light source array, and A laser beam is emitted to the shaping component.
The display device according to claim 1, wherein:

The optical processing component further includes a wavelength conversion device, the wavelength conversion device is disposed on an optical path between the shaping component and the soft light component, and the wavelength conversion device absorbs at least part of the light emitted by the shaping component, The laser beam is emitted to the soft light component.