CN113126407A - Micro-luminous array, method for adjusting image pixel gap and projection system - Google Patents
Micro-luminous array, method for adjusting image pixel gap and projection system Download PDFInfo
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2013—Plural light sources
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
Abstract
The invention discloses a micro-luminous array, comprising: a micro light emitting unit and a deflection device for changing a pixel gap; the micro-light emitting array is formed by arranging micro-light emitting units in an array form, and the deflection device is positioned in the light emitting direction of the micro-light emitting units. The deflection of the pixels by the deflection device greatly improves the impression of a projection picture, enlarges the flexibility of structure selection of the micro-light emitting array, avoids various structural problems caused by gap control, reduces the design complexity of the device, facilitates the heat dissipation of a chip and prolongs the service life.
Description
Technical Field
The present invention relates to light sources, in particular projection light sources.
Background
The current projection system adopts the principle of an illumination system, a light modulator and a lens. Light modulators typically illuminate pixels by individually switching each pixel. The optical modulators used are mainly: DMD, LCD, Lcos, wherein LCD is a switch for realizing pixels through polarization selective transmission of liquid crystal. The DMD and the Lcos are in reflective on-off, and the on-off of the pixels is realized by controlling the reflection angle of the incident light of each pixel.
In the three modulation modes, the pixel points participating in projection all emit light passively, the modulation of the display effect of the pixels is realized by the light modulator, and the existence of the light modulator causes the projection system to be difficult to miniaturize and simplify.
Therefore, the invention provides a micro-luminous array, a projection system and a manufacturing method of the micro-luminous array, which are used for solving the problems in the prior art.
Disclosure of Invention
In this summary, concepts in a simplified form are introduced that are further described in the detailed description. This summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
To solve the above technical problems, the present invention provides a micro light emitting array comprising: a micro light emitting unit and a deflection device for changing a pixel gap; the micro-light emitting array is formed by arranging micro-light emitting units in an array form, and the deflection device is positioned in the light emitting direction of the micro-light emitting units.
Illustratively, the micro-light emitting array further comprises a light shielding plate member, and the light emitted by the micro-light emitting units sequentially passes through the light shielding plate member and the deflection device.
Illustratively, the deflection device comprises an electromagnetic adsorption device which is used for providing a driving force to realize the deflection motion of the deflection device.
Exemplarily, the deflection device comprises a light-transmitting plate member, the electromagnetic adsorption device is connected with the light-transmitting plate member, and the control circuit continuously changes the current direction to realize the opening and closing movement, so that the deflection movement of the light-transmitting plate member is realized.
Exemplarily, the deflection device comprises a light-transmitting plate member, the electromagnetic adsorption device is connected with the light-transmitting plate member, and the control circuit continuously changes the current direction to realize the opening and closing movement, so that the deflection movement of the light-transmitting plate member is realized.
Illustratively, the deflection device is a unidirectional deflection device or a bidirectional deflection device.
Illustratively, the light-transmissive plate member comprises a planar glass plate. Illustratively, the light shielding plate is a light opaque portion or a light extinction portion corresponding to a position between the micro light emitting units.
Illustratively, the light shielding plate is a light-transmitting part corresponding to a part or all of the micro light-emitting unit.
Illustratively, the light-transmitting area of the light shielding plate is rectangular or square, and the light-transmitting area is not larger than the micro-light-emitting unit area, which refers to the area of the micro-light-emitting unit irradiated with light at the position of the light shielding plate.
Illustratively, the side of the light shielding plate facing away from the micro-light emitting unit is arranged in a light extinction mode.
Illustratively, the micro-light emitting array formed by the micro-light emitting units has at least one row and/or at least one column, and the micro-light emitting array has equal row spacing and/or equal column spacing.
The invention also provides a method for adjusting the pixel gap of an image displayed by the micro-luminous array, which comprises any one of the micro-luminous arrays, wherein the pixel gap between the pixels of the image displayed by the micro-luminous array after passing through the deflection device depends on the thickness, the refractive index and/or the inclination angle of the light-transmitting plate.
Illustratively, S ≈ d ═ θ · (n-1)/n, where: s is pixel displacement, d is the thickness of the light-transmitting plate, n is the refractive index of the light-transmitting plate, and theta is the inclination angle of the light-transmitting plate;
and adjusting and selecting the thickness of the light-transmitting plate, the refractive index of the light-transmitting plate and/or the inclination angle of the light-transmitting plate according to the pixel gap so that S is larger than or equal to the pixel gap.
The invention also provides a projection system comprising any one of the above micro-luminescent arrays.
According to the micro-luminous array, the method for adjusting the image pixel gap displayed by the micro-luminous array and the projection system, the deflection of the pixels by the deflection device greatly improves the appearance of a projection picture, expands the flexibility of structure selection of the micro-luminous array, avoids various structural problems caused by gap control, reduces the design complexity of the device, facilitates the heat dissipation of a chip and prolongs the service life.
Drawings
The following drawings of the invention are included to provide a further understanding of the invention. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.
In the drawings:
FIG. 1 is a schematic diagram of a projection system according to the prior art;
FIG. 2 is a schematic diagram of a projection system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a micro-emissive array according to one embodiment of the present invention;
FIG. 4 is a schematic diagram showing a structural comparison of two micro-light emitting arrays according to the present invention;
FIG. 5 is a schematic view of a structure of a micro-emissive array, according to one embodiment of the present invention;
FIG. 6 is a schematic view of a structure of a micro-emissive array, according to one embodiment of the present invention;
FIG. 7 is a schematic diagram of pixel shifting according to one embodiment of the present invention;
FIG. 8 is a schematic view of a yaw apparatus according to an embodiment of the present invention;
FIG. 9 is a schematic view of the swing direction of the deflection device according to one embodiment of the present invention;
FIG. 10 is a schematic diagram of a pixel after padding according to an embodiment of the invention;
FIG. 11 is a schematic view of a structure of a micro-emissive array according to another embodiment of the present invention;
FIG. 12 is a schematic view of a structure of a micro-emissive array according to yet another embodiment of the present invention;
FIG. 13 is a schematic diagram of a pixel after padding according to yet another embodiment of the invention.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.
In order to provide a thorough understanding of the present invention, a detailed description will be given in the following description to illustrate the micro-light emitting array and the projection system of the present invention. It will be apparent that the practice of the invention is not limited to the specific details known to those skilled in the art of waste treatment. The following detailed description of the preferred embodiments of the invention, however, the invention is capable of other embodiments in addition to those detailed.
It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
Exemplary embodiments according to the present invention will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art. In the drawings, the thicknesses of layers and regions are exaggerated for clarity, and the same elements are denoted by the same reference numerals, and thus the description thereof will be omitted.
Fig. 1 is a schematic diagram of a projection system in the prior art. As shown in fig. 1, the principle of illumination system + light modulator + lens is used.
Light emitted by the light source enters the illumination system after passing through the light homogenizing rod, and then enters the lens after being modulated by the light modulator, so that projection is realized, and a final image is projected onto the screen. In general, a light modulator switches each pixel individually to realize light emission of the pixel. The optical modulators used are mainly: DMD, LCD, Lcos, wherein LCD is a switch for realizing pixels through polarization selective transmission of liquid crystal. The DMD and the Lcos are in reflective on-off, and the on-off of the pixels is realized by controlling the reflection angle of the incident light of each pixel.
Fig. 2 is a schematic structural diagram of a projection system according to an embodiment of the invention. As shown in fig. 2, a micro-light emitting array + lens mode is adopted.
With the miniaturization of LEDs, micron-sized MLEDs can be applied to projection. The main principle is that the LED array surface with small space and small area is directly projected through the lens to form imaging. The original mode of an illumination system, an optical modulator and a lens is directly changed into the mode of: micro-emissive array + lens mode.
The micro-luminous array is directly used as a light source, and an image is projected onto a screen through a lens. The light emitted by the micro-light emitting array can realize the projection of the image without being modulated by the light modulator, so that a miniaturized and simplified projection system can be obtained, and the technical problem in the projection system shown in the figure 1 is solved.
However, in the micro-light emitting array + lens mode, there are gaps between the micro-LEDs, and the light blocking isolation structure used to prevent interference between pixels or the shaping optical array arranged to change the light emitting distribution of the micro-LEDs will increase the gaps between the light emitting points of the pixels, which affects the appearance of the projected image.
Fig. 3 is a schematic structural view of a micro-light emitting array according to an embodiment of the present invention. As shown in fig. 3, the black lines between the respective pixels indicate inactive areas between the pixels, and the white portions are active pixel light emitting areas. The black portions are mainly the gaps between the isolation structures or the shaping array lenses, and these inactive areas cause the area of the limited pixels of the picture to be smaller. Therefore, the gap between the light emitting points of the pixels is increased, which affects the appearance of the projection screen.
Fig. 4 is a schematic diagram showing a structural comparison of two micro-light emitting arrays according to the present invention.
The left side of fig. 4 is a structural view of the micro light emitting array device used in fig. 3, and due to structural reasons, there is a gap between pixels, and a dark black portion in the drawing is a gap which is provided to prevent interference between pixels and thus cannot be made very small. Wherein the white part is the size of the effective pixel and the color filled squares indicate the luminescent material. The right side of fig. 4 is a block diagram of a micro-emissive array device in accordance with one embodiment of the present invention, and it can be seen that the gap between the emissive pixels is larger than the micro-emissive device shown on the left side.
Fig. 5 is a schematic view of a structure of a micro-light emitting array according to an embodiment of the present invention.
The left diagram of fig. 5 shows the micro-light emitting array shown on the right diagram of fig. 4, and as shown on the left diagram of fig. 5, the effective pixel size of the micro-light emitting array device is D × D, the gap between pixels is L ═ D, H ═ D, and the gap between pixels is much larger than that of the micro-light emitting array shown on the left diagram of fig. 4. The right side of fig. 5 shows the shadow mask over the micro-emissive array device, where the black portion is opaque or a matte portion, which may be illustratively a matte black material, and the white portion is a hole or a translucent area, with a gap and pixel size consistent with the left side.
Illustratively, the position of the light shielding plate corresponding to the original gap is a light opaque portion or a light extinction portion.
Illustratively, a part or all of the position of the light shielding plate corresponding to the micro light emitting unit is a light transmitting part. When all positions of the light shielding plate corresponding to the micro light-emitting units are light-transmitting parts, the light-transmitting parts completely correspond to the micro light-emitting units, the light-transmitting parts and the micro light-emitting units are equal in size, and all light emitted by the micro light-emitting power supply can be emitted through the light shielding plate; when the part of the light shielding plate corresponding to the micro light-emitting unit is a light-transmitting part, the light-transmitting part is smaller than the micro light-emitting unit, at the moment, part of light emitted by the micro light-emitting power supply can be emitted through the light-transmitting part of the light shielding plate, and part of light is shielded by the light shielding plate and cannot be emitted, and at the moment, the opening size of the light shielding plate determines the light-emitting size of the micro light-emitting unit.
Fig. 6 is a schematic view of a structure of a micro-light emitting array according to an embodiment of the present invention.
Fig. 6 is a schematic diagram showing the structure of the micro-light emitting array of fig. 5 after two images are superimposed, and according to the micro-light emitting array structure shown in fig. 6, the overall effect is that all pixels are spaced apart by one pixel.
In the embodiment shown in fig. 6, the pixels are displaced by the displacement action of the plane glass on the light, so that one pixel is increased. The displaced pixels are used to fill the gap in the micro-emissive array device. And a shading plate above the pixels is matched to realize zero-gap pixel display. That is, an object of one embodiment of the present invention is to change the problem of gaps existing between pixels in the MLED display technology.
To understand how the embodiment shown in fig. 6 solves the above problem, please refer to the schematic diagrams of fig. 7 to 10 to describe the specific reasoning relationship.
FIG. 7 is a schematic diagram of pixel shifting according to one embodiment of the invention. As shown in fig. 7, according to the law of refraction of light, when light is obliquely incident on a flat glass, the direction of the emergent light is the same as that of the incident light, but the position of the emergent light is horizontally shifted by S, the size of S is related to the thickness d, the refractive index n and the inclination angle θ of the glass, and when θ <20 °, S ≈ d ≈ θ (n-1)/n.
The displacement effect of the flat glass on the pixel is shown in fig. 7, for example, light emitted by the light source is incident light, and after the incident light passes through the flat glass inclined to the optical axis, the emitting position of the light is shifted, and the emitting direction is not changed, and exemplarily, a signal output by the effective pixel in fig. 6 is simulated as a signal output by a black gap therein.
The specific simulation process can be described with reference to the apparatus shown in fig. 8.
FIG. 8 is a schematic view of a yaw apparatus according to an embodiment of the present invention. As shown in fig. 8, wherein the yawing device includes: plane glass 1, glass fixed bolster 2, rotation axis 3, fixing base 4, adsorption equipment 5.
When the glass fixing support works, the current direction of the adsorption device 5 is controlled through a circuit, the change of magnetic poles is realized by utilizing the magnetic effect of current, and magnetic materials exist on the glass fixing support 2 at the position corresponding to the adsorption device 5 and are matched with the adsorption device 5 to realize adsorption movement. Fig. 8 shows the yawing motion of the yawing device in one direction, the swinging direction of which is shown by the arrow therein.
Fig. 9 is a schematic view of the swing direction of the deflection device according to an embodiment of the present invention. As shown in fig. 9, for some embodiments, the deflection device can achieve two unidirectional deflections when in use. The yaw direction is shown by the arrow in fig. 9.
By utilizing the principle, a deflection device is added in front of the micro-luminous array device, and is exemplarily a plane glass device which can deflect in two vertical directions (two vertical directions in which pixels are distributed), so that the displacement of a specific position of a pixel is realized.
FIG. 10 is a schematic diagram of a pixel after padding according to an embodiment of the invention.
The thickness, the refractive index and the deflection angle of the glass in the deflection device are adjusted, so that 1 pixel can be accurately deflected to 3 different positions, and the gap between the actual pixels is filled. The hatched portion shown in fig. 10 is the pixel position after the pixel shift, and the white portion is the pixel position projected when the pixel is not shifted. Illustratively, a white pixel 1 is shifted to produce three pixels 2, 5, 9, e.g., pixel 1 produces pixel 5 by horizontal swinging of the deflection device, pixel 1 produces pixel 2 by vertical swinging of the deflection device, and pixel 9 by simultaneous horizontal and vertical swinging of the deflection device.
As shown in fig. 10, the white part is an actual pixel (pixel without shift), and the pixel shaded in gray is a pixel after shift. The whole effect after pixel displacement is that the number of pixels is increased to 4 times of the original number, and meanwhile, no gap or small gap can be controlled among the pixels.
Because the number of pixels is increased by 3 times, in order to completely display the information of the picture, each pixel needs to complete the display of 4 pixel point information within the time of one frame of picture, namely the actual time of each frame is one fourth of the input time. The existing image processing software can be used for dividing the picture of each frame into four frames to be displayed quickly.
Because an actual pixel is divided in a time domain, the display of 4 pixels can be completed, the displayed pixel gap can be very small, zero or even negative, and the appearance of a projection picture is greatly improved, so that the flexibility of structure selection of the micro-luminous array can be enlarged, the gap of the micro-array can be large, the isolation of an MLED (multi-level emitting diode) and the setting of a micro-shaping optical device are met, and various structural problems caused by gap control are avoided.
A micro-emissive array as provided in fig. 7 to 10, comprising: a micro light emitting unit and a deflection device; the micro-light emitting array is formed by arranging the micro-light emitting units in an array form, original gaps are formed among the micro-light emitting units, the deflection device is located in the light emitting direction of the micro-light emitting array, and pixel gaps among pixels of images displayed by the micro-light emitting array after passing through the deflection device are smaller than the original gaps.
For example, when the pixel gap between the pixels of the image displayed by the micro-light emitting array after the deflection device is negative, the pixels after the deflection are overlapped.
The deflection of the pixels by the deflection device greatly improves the impression of a projection picture, enlarges the flexibility of structure selection of the micro-light emitting array, avoids various structural problems caused by gap control, reduces the design complexity of the device, facilitates the heat dissipation of a chip and prolongs the service life.
Fig. 11 is a schematic view of a structure of a micro-light emitting array according to another embodiment of the present invention.
As shown in fig. 11, L and H in the micro-light emitting array can be set to be smaller than D, so when the deflection apparatus shown in fig. 8 and 9 is applied to the micro-light emitting array shown in fig. 11, since the number of pixels is increased by 3 times, in order to completely display the information of the picture, each pixel needs to complete the display of 4 pieces of pixel information within the time of one frame of picture, that is, the actual time of each frame is one quarter of the input time. The existing image processing software can be used for dividing the picture of each frame into four frames to be displayed quickly.
In this embodiment, the shifted pixels are smaller than the pixels that are not shifted, and therefore, the shifting distance can be relatively small, and in this case, the requirements for the yaw speed and the yaw angle of the yaw apparatus can be appropriately relaxed.
Because an actual pixel is divided in the time domain, the display of 4 pixels can be completed, and therefore, the displayed pixel gap can be a negative number, so that the appearance of a projection picture in the embodiment shown in fig. 11 is greatly improved, the flexibility of structure selection of the micro-light emitting array can be increased, the gap of the micro-array can be large, the setting of an isolation and micro-shaping optical device of the MLED is met, and various structural problems caused by gap control are avoided. Moreover, pixels in the final output picture are overlapped, and a finer display effect is generated.
Fig. 12 is a schematic view of a structure of a micro-light emitting array according to still another embodiment of the present invention.
The left side of fig. 12 shows a micro-emissive array, and as shown in the left side of fig. 5, the pixels of the micro-emissive array device are densely arranged in one direction, such as the vertical direction, and are spaced apart by a distance of one pixel or more than one pixel, such as the horizontal direction, in the other direction. The right side of fig. 12 shows the shadow mask over the micro-emissive array device, where the black portions are opaque or matte portions, which may be illustratively matte black material, and the white portions are holes or opaque regions, with gaps and pixel sizes consistent with those in the left side.
Illustratively, the position of the light shielding plate corresponding to the original gap is a light opaque portion or a light extinction portion.
Illustratively, a part or all of the position of the light shielding plate corresponding to the micro light emitting unit is a light transmitting part. When all positions of the light shielding plate corresponding to the micro light-emitting units are light-transmitting parts, the light-transmitting parts completely correspond to the micro light-emitting units, the light-transmitting parts and the micro light-emitting units are equal in size, and all light emitted by the micro light-emitting power supply can be emitted through the light shielding plate; when the part of the light shielding plate corresponding to the micro light-emitting unit is a light-transmitting part, the light-transmitting part is smaller than the micro light-emitting unit, at the moment, part of light emitted by the micro light-emitting power supply can be emitted through the light-transmitting part of the light shielding plate, and part of light is shielded by the light shielding plate and cannot be emitted, and at the moment, the opening size of the light shielding plate determines the light-emitting size of the micro light-emitting unit.
As shown in fig. 12, one of the directions is densely arranged, and the other direction is spaced apart by a distance of one pixel or one multi-pixel, in this embodiment, a deflection device may be provided, which deflects and displaces in one direction, and after the flat glass deflects in one direction, the pixels displace by a distance of one pixel.
Where the white part is the actual pixel and the gray shaded pixels are the shifted pixels. The overall effect after pixel displacement is that the pixels are increased by 2 times, and no or small gaps are formed between the pixels.
FIG. 13 is a schematic diagram of a pixel after padding according to yet another embodiment of the invention.
The thickness, the refractive index and the deflection angle of the glass in the deflection device are adjusted, so that 1 pixel can be accurately deflected to 2 different positions, and the gap between the actual pixels is filled. The hatched portion shown in fig. 13 is the pixel position after the pixel shift, and the white portion is the pixel position projected when the pixel is not shifted. Illustratively, the white pixel 1 is shifted to generate a further pixel, e.g. by a horizontal swing of the deflection means causing the pixel 1 to generate the pixel 5, by a vertical or horizontal swing of the deflection means causing the pixel 1 to generate the pixel 5.
Because the number of pixels is increased by 1 time, in order to completely display the information of the picture, each pixel needs to complete the display of 2 pieces of pixel point information within the time of one frame of picture, namely the actual time of each frame is half of the input time. The existing image processing software can be used for dividing the picture of each frame into two frames to be displayed quickly.
Because an actual pixel is divided in a time domain, the display of 2 pixels can be completed, the displayed pixel gap can be very small, zero or even negative, and the appearance of a projection picture is greatly improved, so that the flexibility of structure selection of a micro-luminous array can be enlarged, the gap of the micro-array can be large, the isolation of an MLED (multi-level emitting diode) and the setting of micro-shaping optical devices are met, and various structural problems caused by gap control are avoided.
A micro-emissive array as provided in fig. 12, comprising: a micro light emitting unit and a deflection device; the micro-light emitting array is formed by arranging the micro-light emitting units in an array form, original gaps are formed among the micro-light emitting units, the deflection device is located in the light emitting direction of the micro-light emitting array, and pixel gaps among pixels of images displayed by the micro-light emitting array after passing through the deflection device are smaller than the original gaps.
Illustratively, the pixel gaps among the pixels of the image displayed by the micro-luminous array after the deflection device are zero, the pixels after the deflection are closely connected, no blank area exists, and excellent display effect is realized.
Illustratively, when the pixel gaps between the pixels of the image displayed by the micro-luminous array after the deflection device are negative numbers, the deflected pixels have certain overlap, so that full-screen display is ensured, sufficient margin is provided for excellent display, and sufficient realization of excellent display effect is ensured.
The invention also provides a manufacturing method of the micro-luminous array, which comprises the following steps: determining a light shielding plate structure according to the structure of the micro-luminous array, wherein the micro-luminous array comprises micro-luminous units, and the position of the light shielding plate corresponding to the micro-luminous units is a light-tight part or a light extinction part; determining the structure of a deflection device according to the light shielding plate structure, and filling original gaps among pixels of an original image by utilizing the deflection device for the pixels of the image displayed by the micro-luminous array after passing through the deflection device; the micro light-emitting unit corresponds to at least two pixels on an image displayed by the micro light-emitting array after passing through the deflection device.
Illustratively, determining the structure of the deflection device according to the light shielding plate structure comprises determining the thickness, the refractive index and/or the inclination angle of the plane glass plate in the deflection device according to the light shielding plate structure.
Once the distance required to swing is determined, the thickness, the refractive index and/or the inclination angle of the plane glass plate can be optimized, so that better parameters are obtained, and the simple structure and stable operation of the deflection device are ensured.
Exemplarily, determining a light shielding plate structure according to the structure of the micro-light emitting array, including determining the light shielding plate structure according to the size of the micro-light emitting units in the micro-light emitting array and the gap between the micro-light emitting units, so that the micro-light emitting array passes through the light shielding plate to form an array distribution with light and dark phases, wherein the light and dark phases refer to that light transmitting parts and non-light transmitting parts/extinction parts of the light shielding plate are arranged at intervals.
The micro light-emitting units can be rectangular, square or circular, when the micro light-emitting units are applied to the micro light-emitting arrays, the micro light-emitting units are usually adjusted to be rectangular structures through the light shielding plate structure in consideration of habits of human eyes, and the invention takes the problem of display effect caused by gaps among pixels of images displayed by the micro light-emitting arrays into consideration, the light emitted by the micro light-emitting units is adjusted through the light shielding plate, so that the micro light-emitting arrays with alternate light and shade are formed after passing through the light shielding plate, the bright areas and the dark areas are alternately arranged, the subsequent display of the dark areas is facilitated, the dark areas do not exist on the displayed images, and the display effect is optimized.
For example, the size of the bright area may be larger than that of the dark area, and in this case, the micro-lighting unit corresponds to one bright area and one dark area, and then the bright area pixels and the dark area pixels overlap, so that the displayed image is smoother and more effective.
For example, the dark area may be larger than the bright area, and in this case, by providing the deflection device, one micro light emitting unit may correspond to two or more pixels, and the dark area is filled up by the two or more pixels, so that the displayed image is smoother and more effective.
Illustratively, the light shield structure is arranged in equal row spacing and/or equal column spacing. Wherein, the equal interval arrangement comprises equal line spacing arrangement and/or equal column spacing arrangement.
Based on the foregoing description, the present invention also provides a method for fabricating a micro-light emitting array, the method comprising: determining a light shielding plate structure according to the structure of the micro-luminous array, wherein the micro-luminous array comprises micro-luminous units, and the position of the light shielding plate corresponding to the micro-luminous units is a light-tight part or a light extinction part; determining the structure of a deflection device according to the light shielding plate structure, and filling original gaps among pixels of an original image by utilizing the deflection device for the pixels of the image displayed by the micro-luminous array after passing through the deflection device; the micro light-emitting unit corresponds to at least two pixels on an image displayed by the micro light-emitting array after passing through the deflection device.
Illustratively, the micro light emitting units in the micro light emitting array correspond to four pixels on an image displayed by the micro light emitting array after the deflection device, and the four pixels correspond to one picture for displaying in four frames.
Illustratively, the light shield structure is arranged in equal row spacing and/or equal column spacing.
Exemplarily, determining a light shielding plate structure according to the structure of the micro-light emitting array, including determining the light shielding plate structure according to the size of the micro-light emitting units in the micro-light emitting array and the gap between the micro-light emitting units, so that the micro-light emitting array passes through the light shielding plate to form an array distribution with light and dark phases, wherein the light and dark phases refer to that light transmitting parts and non-light transmitting parts/extinction parts of the light shielding plate are arranged at intervals.
Illustratively, the structure of the deflection device is determined according to the light shielding plate, and the method comprises the step of determining the thickness, the refractive index and/or the inclination angle of the plane glass plate in the deflection device according to the structure of the light shielding plate.
In summary, according to the micro light emitting array, the method for adjusting the image pixel gap and the projection system of the present invention, the deflection of the pixels by the deflection device greatly improves the appearance of the projection picture, expands the flexibility of the structure selection of the micro light emitting array, avoids various structural problems caused by gap control, reduces the design complexity of the device, facilitates the heat dissipation of the chip, and increases the service life.
The present invention has been illustrated by the above embodiments, but it should be understood that the above embodiments are for illustrative and descriptive purposes only and are not intended to limit the invention to the scope of the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many variations and modifications may be made in accordance with the teachings of the present invention, which variations and modifications are within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (14)
1. A micro-emissive array, comprising: a micro light emitting unit and a deflection device for changing a pixel gap;
the micro-luminous array is formed by arranging micro-luminous units in an array form,
the deflection device is positioned in the light-emitting direction of the micro light-emitting unit.
2. A micro-emissive array as claimed in claim 1, further comprising a light baffle member, wherein the light emitted from the micro-emissive unit passes through the light baffle member and the deflection device in sequence.
3. A micro-emissive array as claimed in claim 1 or 2, wherein the deflection means comprises an electromagnetic attraction means for providing a driving force to effect a deflection motion of the deflection means.
4. The micro-lighting array of claim 3, wherein the deflection device comprises a light-transmitting plate member, the electromagnetic absorption device is connected to the light-transmitting plate member, and the control circuit continuously changes the current direction to realize the opening and closing movement, so as to realize the deflection movement of the light-transmitting plate member.
5. The micro-emissive array of claim 4, wherein the deflection device is a unidirectional deflection device or a bidirectional deflection device.
6. A micro-emissive array as claimed in claim 4, wherein the light-transmissive plate member comprises a planar glass plate.
7. A micro-emissive array as claimed in claim 2, wherein the light blocking plate is a light opaque portion or a light extinction portion corresponding to a position between the micro-emissive units.
8. A micro-lighting array according to claim 2, wherein the light shielding plate is a light-transmitting part corresponding to a part or all of the micro-lighting units.
9. A micro-lighting array as claimed in claim 7 or 8, wherein the light-transmitting area of the light-shielding plate is rectangular or square, and the light-transmitting area is not larger than the area of the micro-lighting unit, and the area of the micro-lighting unit is the area of the micro-lighting unit illuminated by light at the position of the light-shielding plate.
10. A micro-emissive array as claimed in claim 9, wherein the side of the light shield facing away from the micro-emissive units is disposed to be matt.
11. A micro-emissive array as claimed in claim 1 or 2, wherein the micro-emissive array of micro-emissive units has at least one row and/or at least one column, and the micro-emissive array has equal row spacing and/or equal column spacing.
12. A method of adjusting the pixel spacing of an image displayed by a micro-emissive array comprising a micro-emissive array according to any of claims 1 to 11, wherein the pixel spacing between pixels of an image displayed by the micro-emissive array after passing through the deflection means is dependent on the thickness, refractive index and/or tilt angle of the light transmissive plate.
13. The method of claim 12, wherein S ≈ d · (n-1)/n, where: s is pixel displacement, d is the thickness of the light-transmitting plate, n is the refractive index of the light-transmitting plate, and theta is the inclination angle of the light-transmitting plate;
and adjusting and selecting the thickness of the light-transmitting plate, the refractive index of the light-transmitting plate and/or the inclination angle of the light-transmitting plate according to the pixel gap so that S is larger than or equal to the pixel gap.
14. A projection system, comprising: the micro-emissive array of any one of claims 1 to 13.
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