Micro-led display panel, color light engine and electronic device

Abstract

A micro-LED display panel, a color light engine and an electronic device. The micro-LED display panel comprises: a chip structure, which comprises a micro-LED display chip and has a light-emitting face; and an imaging cover plate, which is located on the light-emitting face of the chip structure and is used for converging or scattering light emitted by the chip structure. When the micro-LED display panel is applied to the color light engine, a color light engine with a relatively large field of view is obtained.

Description

Micro-LED display panels, color light engines and electronic devices

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on March 21, 2024, with application number 2024103311307 and invention name “Micro-LED display panel, color light engine and electronic device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of micro-projection technology, and in particular to a Micro-LED display panel, a color light engine, and an electronic device. Background Art

[0003] As people's demand for product comfort increases, projection technology is developing towards high brightness, high quality, and miniaturization. Among them, micro-light-emitting diode (Micro-LED) technology, considered a next-generation Micro-LED display panel technology, has attracted widespread attention. Compared with traditional organic light-emitting diode (OLED) or liquid crystal display (LCD)-based microdisplays, Micro-LED offers higher wall plug efficiency, higher brightness, lower efficiency droop, better thermal stability, longer lifespan, faster response rate, higher resolution, wider color gamut, and higher contrast.

[0004] In the current Micro-LED-based projection technology, in order to achieve colored projection, the existing color light engine uses three panels to emit red light, blue light and green light respectively, and then forms a color image through a color combining prism and an optical lens.

[0005] However, with the continuous development of color light engine technology, users are increasingly demanding color light engines with a wider field of view and a stronger immersive experience. The existing color light engines have limited field of view and their structures need further improvement.

[0006] Summary of the Invention

[0007] The technical problem solved by the present invention is to provide a Micro-LED display panel, a color light engine and an electronic device, and to improve the performance of the color light engine by improving the structure of the Micro-LED display panel.

[0008] In order to solve the above technical problems, the technical solution of the present invention provides a Micro-LED display panel, including: a chip structure, the chip structure includes a Micro-LED display chip, and the Micro-LED display chip has a light-emitting surface; an imaging cover plate located on the light-emitting surface of the chip structure, and the imaging cover plate is used to converge or diverge the light emitted by the chip structure.

[0009] Correspondingly, the technical solution of the present invention also provides a color light engine, comprising: a light-emitting component, the light-emitting component comprising at least two light-emitting elements, wherein at least one of the light-emitting elements adopts the above-mentioned Micro-LED display panel, and the colors of light emitted by different light-emitting elements are different; a color combining device, the color combining device having an exit surface and at least two incident surfaces, each of the incident surfaces being opposite to each of the light-emitting elements, so that the light emitted by each of the light-emitting elements enters the color combining device, the color combining device is used to combine light and emit light from the exit surface; an optical lens, the optical lens is opposite to the exit surface of the color combining device, and is used to, after obtaining the light emitted from the exit surface of the color combining device, emit the light through the optical lens and form an image.

[0010] Correspondingly, the technical solution of the present invention also provides another color light engine, including: a light-emitting component, the light-emitting component including at least two light-emitting elements, each of the light-emitting elements including a Micro-LED display chip and a translucent packaging cover plate encapsulated on the light-emitting surface of the Micro-LED display chip, and the light emitted by different light-emitting elements has different colors; a color combining device, the color combining device having an exit surface and at least two incident surfaces, each of the incident surfaces being opposite to each of the light-emitting elements so as to allow the light emitted by each of the light-emitting elements to enter, the color combining device being used to combine light so that the light is emitted from the exit surface; an optical imaging device, the optical imaging device including a first imaging component and a second imaging component, the first imaging component being located between the light-emitting component and the color combining device, the first imaging component including an imaging cover plate located between at least one of the light-emitting elements and the color combining device, the imaging cover plate being used to converge or diverge the light emitted by the corresponding light-emitting element, the second imaging component being opposite to the exit surface of the color combining device, and being used to, after acquiring the light emitted from the exit surface of the color combining device, allow the light to be emitted through the second imaging component and formed into an image.

[0011] Correspondingly, the technical solution of the present invention further provides an electronic device, comprising the above-mentioned color engine.

[0012] Compared with the existing technology, the technical solution of the embodiment of the present invention has the following beneficial effects:

[0013] In the Micro-LED display panel provided by the technical solution of the present invention, an imaging cover plate is located on the light-emitting surface of the chip structure, enabling the light emitted by the chip structure to converge or diverge. When the Micro-LED display panel described in the technical solution of the present invention is used in a color light engine, compared to existing color light engines, the "back focal length" of the color light engine's optical system can be reduced, resulting in a color light engine with a larger field of view angle, because the light emitted by the Micro-LED display panel is already converged or diverged before entering the color combining device.

[0014] In a color light engine provided by the technical solution of the present invention, since the light emitted by the Micro-LED display panel in the technical solution of the present invention has been converged or diverged before entering the color combining device, the "back focal length" of the optical system of the color light engine can be reduced. Therefore, while increasing the field of view of the color light engine, the size of the color combining device can be maintained, thereby avoiding the problem of mutual interference between the light-emitting elements generated when assembling the color light engine.

[0015] In another color light engine provided by the technical solution of the present invention, the first imaging component is arranged between the light-emitting component and the color combining device. The first imaging component includes an imaging cover plate located between at least one of the light-emitting elements and the color combining device. The imaging cover plate is used to converge or diverge the light emitted by the corresponding light-emitting element, which can reduce the "back focal length" of the optical system of the color light engine. Therefore, while increasing the field of view of the color light engine, the size of the color combining device can be maintained, thereby avoiding the problem of mutual interference between the light-emitting elements generated when assembling the color light engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic structural diagram of a color light engine;

[0017] 2 and 3 are schematic structural diagrams of a Micro-LED display panel according to an embodiment of the present invention;

[0018] FIG4 is a schematic structural diagram of the Micro-LED display chip in FIG3 according to an embodiment of the present invention;

[0019] FIG5 is a schematic structural diagram of a color light engine according to an embodiment of the present invention;

[0020] 6 and 7 are schematic structural diagrams of a Micro-LED display panel according to another embodiment of the present invention;

[0021] FIG8 is a schematic structural diagram of a Micro-LED display panel according to another embodiment of the present invention;

[0022] FIG9 is a schematic structural diagram of a Micro-LED display panel according to another embodiment of the present invention;

[0023] FIG10 is a schematic structural diagram of a Micro-LED display panel according to another embodiment of the present invention;

[0024] FIG11 is a schematic structural diagram of a Micro-LED display panel according to another embodiment of the present invention;

[0025] FIG12 is a schematic structural diagram of a Micro-LED display panel according to another embodiment of the present invention;

[0026] FIG13 is a schematic structural diagram of a Micro-LED display panel according to another embodiment of the present invention;

[0027] FIG14 is a schematic structural diagram of a color light engine according to another embodiment of the present invention;

[0028] 15 is a schematic structural diagram of a first supporting member in a color light engine according to another embodiment of the present invention;

[0029] FIG16 is a schematic structural diagram of a color light engine according to another embodiment of the present invention;

[0030] FIG17 is a schematic structural diagram of a color light engine according to another embodiment of the present invention. DETAILED DESCRIPTION

[0031] As described in the background art, the increase in the field of view angle of existing color light engines is limited, and their structure needs to be further improved.

[0032] FIG1 is a schematic diagram of the structure of a color light engine.

[0033] Referring to FIG. 1 , the color light engine includes a light-emitting element 101, a color-combining prism 102, and an optical lens 103. The light-emitting element 101 includes three panels that emit red, blue, and green light, respectively. The optical lens 103 includes a lens assembly (not shown). The light emitted by the light-emitting element 101 passes through the color-combining prism 102 and the lens assembly in the optical lens 103 to form a color image.

[0034] In the aforementioned color light engine, the optical lens 103 is used for imaging. To increase the field of view, the "back focal length" of the optical lens 103 needs to be reduced. In the aforementioned color light engine, the "back focal length" is determined by the distance between the lens closest to the light-emitting element 101 in the lens 103 and the light-emitting element 101. In the prior art, the field of view of the color light engine is increased by reducing the size of the color combining prism located between the lens closest to the light-emitting element 101 and the light-emitting element 101. However, reducing the size of the color combining prism 102 causes interference between the three light-emitting elements 101 mounted on the color combining prism during assembly, preventing assembly of the color light engine.

[0035] In order to solve the above problems, the present invention provides a Micro-LED display panel, a color light engine and an electronic device, in which an imaging cover plate is located on the light-emitting surface of the Micro-LED display chip, and is used to converge or diverge the light emitted by the Micro-LED display chip. When the Micro-LED display panel in the technical solution of the present invention is used in a color light engine, compared with the existing color light engine, since the light emitted by the Micro-LED display panel has been converged or diverged before entering the color combining device, the "back focal length" of the optical system of the color light engine can be reduced. Therefore, while increasing the field of view of the color light engine, the size of the color combining device can be maintained, thereby avoiding the mutual interference problem between the light-emitting elements generated when assembling the color light engine.

[0036] In order to make the above-mentioned objects, features and beneficial effects of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0037] 2 and 3 are schematic structural diagrams of a Micro-LED display panel according to an embodiment of the present invention.

[0038] Please refer to Figures 2 and 3, Figure 2 is a schematic diagram of the top view structure, and Figure 3 is a schematic diagram of the cross-sectional structure along the DD1 direction in Figure 2. The Micro-LED display panel includes: a chip structure 201, the chip structure 201 includes a Micro-LED display chip, and the chip structure 201 has a light-emitting surface 201a; an imaging cover plate 202 located on the light-emitting surface 201a of the chip structure 201, and the imaging cover plate 202 is used to converge or diverge the light emitted by the chip structure 201.

[0039] Here, the imaging cover plate 202 is located on the light-emitting surface of the chip structure 201, and can converge or diverge the light emitted by the chip structure 201. When the Micro-LED display panel described in the technical solution of the present invention is used in a color light engine, compared with existing color light engines, because the light emitted by the Micro-LED display panel is converged or diverged before entering the color combining device, the "back focal length" of the color light engine's optical system can be reduced, resulting in a color light engine with a larger field of view.

[0040] In this embodiment, the viewing angle of the color light engine can be increased to 80°.

[0041] In this embodiment, the imaging cover plate 202 is directly packaged onto the Micro-LED display chip.

[0042] In another embodiment, the chip structure further includes a light-transmitting packaging cover plate packaged on the surface of the Micro-LED display chip, wherein the light-transmitting packaging cover plate is disposed between the Micro-LED display chip and the imaging cover plate. That is, the imaging cover plate is packaged onto the light-transmitting packaging cover plate of the chip structure.

[0043] The material of the light-transmitting packaging cover plate includes transparent glass.

[0044] It should be noted here that the Micro-LED display panel in the technical solution of the present invention can be directly prepared, or an imaging cover plate can be added to the Micro-LED display panel obtained by the prior art to obtain the Micro-LED display panel in the technical solution of the present invention.

[0045] The imaging cover plate 202 is a positive lens; or the imaging cover plate 202 is a negative lens.

[0046] In this embodiment, the imaging cover plate 202 is a positive lens. In other embodiments, the imaging cover plate may also be a negative lens.

[0047] It should be noted that when the Micro-LED display panel is used to assemble a color light engine, the optical lens in the color light engine needs to cooperate with the Micro-LED display panel for imaging.

[0048] In this embodiment, the size of the Micro-LED display chip 201 in a direction parallel to the light emitting surface ranges from 0.05 inches to 0.5 inches; the size of the imaging cover plate 202 in a direction perpendicular to its optical axis ranges from 1 mm to 20 mm.

[0049] The positive lens includes a plano-convex lens, a biconvex lens, a meniscus lens, a concave-convex positive lens, or a cemented positive lens. The cemented positive lens includes a lens formed by cementing at least two of the following: a plano-convex lens, a biconvex lens, a meniscus lens, and a concave-convex positive lens. In this embodiment, the positive lens is a plano-convex lens. In other embodiments, the lens may also be a biconvex lens, a meniscus lens, a concave-convex positive lens, or a cemented positive lens.

[0050] The negative lens includes a plano-concave lens, a biconcave lens, a concave-convex negative lens or a cemented negative lens; the cemented negative lens includes a lens formed by cementing at least two of the plano-concave lens, the biconcave lens and the concave-convex negative lens.

[0051] The imaging cover plate 202 is made of optical glass or optical epoxy resin. Optical glass provides excellent transparency and durability, chemical stability, and optical performance, enabling high-quality imaging. Optical epoxy resin lenses provide high transparency, enabling clear optical transmission and conduction, excellent mechanical properties, and resistance to physical stress and external impact. They also possess chemical stability and maintain optical performance in harsh environments.

[0052] The chip structure 201 includes a light-emitting area (not shown in the figure) and a non-light-emitting area (not shown in the figure).

[0053] In this embodiment, the imaging cover plate 202 is located on the light-emitting area and the non-light-emitting area, that is, the imaging cover plate 202 covers the entire surface of the chip structure 201 .

[0054] In another embodiment, the imaging cover plate is only located on the light emitting area.

[0055] The distance between the imaging cover plate 202 and the chip structure 201 is less than or equal to 0.5 mm.

[0056] The imaging cover plate 202 and the chip structure 201 are connected by a first fixing method. Different fixing methods between the imaging cover plate 202 and the chip structure 201 have different limits on the distance between them.

[0057] In this embodiment, the imaging cover plate 202 and the chip structure 201 are in contact with each other, that is, the imaging cover plate 202 and the Micro-LED display chip are in contact with each other.

[0058] In other embodiments, there may be a certain distance between the imaging cover plate and the light-transmitting packaging cover plate, and the distance is less than or equal to 0.5 mm.

[0059] The first fixing method includes bonding.

[0060] In this embodiment, the imaging cover plate 202 and the chip structure 201 are directly bonded.

[0061] In another embodiment, the imaging cover plate and the chip structure 201 are bonded to each other via a bonding layer; the thickness of the bonding layer ranges from 0.5 μm to 3 μm; and the material of the bonding layer includes silicon oxide.

[0062] In another embodiment, the first fixing method includes gluing; the thickness of the optical adhesive layer between the imaging cover plate and the chip structure ranges from 0.05 mm to 0.3 mm; and the material of the optical adhesive layer includes acrylate, epoxy resin or polyester.

[0063] In yet another embodiment, the first fixing manner includes: the imaging cover plate and the chip structure are connected via a supporting member; and the distance between the imaging cover plate and the chip structure is in a range of 0.1 mm to 0.5 mm.

[0064] The outline shape of the imaging cover plate 202 can be a circle, a rounded rectangle, or a rectangle, etc., to facilitate fixation.

[0065] A partial surface or the entire surface of the imaging cover plate 202 is connected to the surface of the chip structure 201 ; the partial surface includes an edge surface of the imaging cover plate 202 .

[0066] In this embodiment, the entire surface of the imaging cover plate 202 is bonded to the surface of the chip structure 201 .

[0067] In another embodiment, a portion of the surface of the imaging cover plate is bonded to the surface of the light-transmitting encapsulation cover plate 21. Specifically, the imaging cover plate and the light-transmitting encapsulation cover plate can be connected from the edge.

[0068] FIG4 is a schematic structural diagram of the Micro-LED display chip in FIG3 according to an embodiment of the present invention.

[0069] Referring to FIG. 4 , the Micro-LED display chip includes: a driving backplane 2011 ; and a plurality of chip units 2012 arranged in an array on the driving backplane 2011 , each of the chip units 2012 being electrically connected to the driving backplane 2011 .

[0070] The driving backplane 2011 may be an IC backplane or a TFT backplane.

[0071] In this embodiment, please continue to refer to Figure 3. The Micro-LED display panel also includes: a support plate (not shown in the figure), the support plate is located on the non-light-emitting surface 201b of the chip structure 201, and the non-light-emitting surface 201b is opposite to the light-emitting surface 201a; a circuit board (not shown in the figure), the circuit board is connected to the Micro-LED display chip.

[0072] In this embodiment, the support plate includes a reinforcing sheet.

[0073] The reinforcing sheet is made of Invar steel, aluminum or ceramic material, wherein aluminum or ceramic material has good supporting capacity and heat dissipation effect.

[0074] The circuit board can be a rigid circuit board, a flexible circuit board or a rigid-flexible circuit board.

[0075] FIG5 is a schematic structural diagram of a color light engine according to an embodiment of the present invention.

[0076] Correspondingly, an embodiment of the present invention further provides a color light engine. Please refer to Figure 5 on the basis of Figure 3. The color light engine includes: a light-emitting component, wherein the light-emitting component includes at least two light-emitting elements 21, wherein at least one of the light-emitting elements 21 adopts the above-mentioned Micro-LED display panel, and the colors of light emitted by different light-emitting elements 21 are different; a color combining device 22, wherein the color combining device 22 has an exit surface (not shown in the figure) and at least two incident surfaces (not shown in the figure), each of the incident surfaces is opposite to each of the light-emitting elements 21, so that the light emitted by each of the light-emitting elements 21 enters the color combining device 22, and the color combining device 22 is used to combine light and emit light from the exit surface; an optical lens 23, wherein the optical lens 23 is opposite to the exit surface of the color combining device 22, and is used to obtain the light emitted from the exit surface of the color combining device 22, and then emit the light through the optical lens 23 and form an image.

[0077] Here, since the light emitted by the Micro-LED display panel in the technical solution of the present invention has been converged or diverged before entering the color combining device 22, the "back focal length" of the optical system of the color light engine can be reduced. Therefore, while increasing the field of view of the color light engine, the size of the color combining device 22 can be maintained, thereby avoiding the problem of mutual interference between the light-emitting elements generated when assembling the color light engine.

[0078] In this embodiment, the distance between the Micro-LED display panel and the color combining device 22 ranges from 0.1 mm to 1 mm.

[0079] In this embodiment, the size of the optical lens 23 along its optical axis ranges from 2 mm to 10 mm.

[0080] In this embodiment, the light-emitting assembly includes three light-emitting elements 21, each of which is configured to generate monochromatic light, with the monochromatic light emitted by different light-emitting elements having different colors. Specifically, one of the light-emitting elements 21 is configured to generate green light, another light-emitting element 21 is configured to generate blue light, and yet another light-emitting element 21 is configured to generate red light.

[0081] In this embodiment, all three light-emitting elements utilize the aforementioned Micro-LED display panel. In another embodiment, two of the light-emitting elements may utilize the Micro-LED display panel described in the technical solution of the present invention, or one of the light-emitting elements may utilize the Micro-LED display panel described in the technical solution of the present invention. When all three light-emitting elements utilize the Micro-LED display panel described in the technical solution of the present invention, the imaging performance of monochromatic light of different colors can be improved.

[0082] In another embodiment, the light-emitting assembly includes two light-emitting elements, one of which is configured to generate dual-color light and the other is configured to generate a first monochromatic light. The dual-color light includes two second monochromatic lights of different colors, and the first monochromatic light and the second monochromatic light have different colors. When the light-emitting assembly uses two light-emitting elements, both light-emitting elements may use the aforementioned micro-LED display panel, or one light-emitting element may use the aforementioned micro-LED display panel.

[0083] In this embodiment, the color combining device 22 includes a color combining prism; the length of the edge of the color combining prism ranges from 3 mm to 15 mm; and the material of the color combining prism includes silicon oxide.

[0084] Specifically, the color combining prism includes four right-angle prisms, the right-angled surfaces of the four right-angle prisms are aligned and bonded to each other, and the oblique surfaces of the four right-angle prisms constitute the four surfaces of the color combining prism, including the incident surface and the exit surface.

[0085] More specifically, in this embodiment, the four surfaces of the color combining prism include three incident surfaces and one exit surface.

[0086] In another embodiment, the four surfaces may include two incident surfaces and one exit surface.

[0087] In the color-combining prism, the material of the reflective film includes an inorganic oxide, and the inorganic oxide includes silicon oxide, aluminum oxide or titanium oxide; the reflectivity of the reflective film to the light emitted by the light-emitting element is greater than 95%; the wavelength range of the light emitted by the light-emitting element includes 350nm to 800nm; the thickness range of the reflective film is less than 10μm.

[0088] In this embodiment, two of the three light-emitting elements 21 are located on either side of the color combining device 22 in a first direction X, and the remaining light-emitting element 21 and the optical lens 23 are located on either side of the color combining device 22 in a second direction Y. The first direction X and the second direction Y are perpendicular to each other. The color combining device 22 can adjust the light emitted by two of the light-emitting elements 21 so that it enters the optical lens 23 together with the light emitted by the remaining light-emitting element 21.

[0089] In another embodiment, it is preferred that the light-emitting element for generating the first monochromatic light is located on one side of the color combining device in a first direction, and the light-emitting element for generating the two-color light and the optical lens are located on both sides of the color combining device in a second direction, respectively, and the first direction and the second direction are perpendicular to each other. When the light-emitting element for generating the first monochromatic light and the optical lens are respectively placed on both sides of the color combining device in the second direction, and the light-emitting element for generating the two-color light is placed on one side of the color combining device in the first direction, or when the light-emitting element generating the first monochromatic light and the light-emitting element generating the two-color light are placed on both sides of the color combining device in the first direction, it is necessary to adjust the color combining device accordingly to change the propagation direction of the light emitted by the light-emitting element generating the two-color light so that the three-color light generated by the two light-emitting elements all enter the optical lens.

[0090] The Micro-LED display panel is connected to the color combining device 22 via a fourth fixing method.

[0091] Specifically, the imaging cover plate of the Micro-LED display panel is connected to the color combining device 22 via a fourth fixing method.

[0092] Regarding the fourth fixing method, please refer to the description of the first fixing method in this article, which will not be repeated here.

[0093] In this embodiment, the fourth fixing method includes gluing; a second optical adhesive layer (not shown in the figure) is provided between the imaging cover plate and the color combining device 22; the material of the second optical adhesive layer includes transparent optical adhesive, and the transparent optical adhesive includes acrylate, epoxy resin or polyester.

[0094] In another embodiment, the fourth fixing manner includes bonding; the imaging cover plate and the color combining device are directly bonded; or the imaging cover plate and the color combining device are bonded to each other via a second bonding layer.

[0095] In another embodiment, the fourth fixing method includes: the imaging cover plate and the color combining device are connected through a second supporting member; the second supporting member includes: a second supporting structure, the second supporting structure includes a third supporting portion and a fourth supporting portion arranged opposite to each other, and the color combining device and the imaging cover plate are both located between the third supporting portion and the fourth supporting portion.

[0096] The imaging cover plate and the second supporting member are connected by a fifth fixing method, which includes gluing, bonding or clamping; the color combining device and the supporting member are connected by a sixth fixing method, which includes gluing, bonding or clamping.

[0097] The second supporting member further includes: a second protruding structure, the second protruding structure including a third protruding portion and a fourth protruding portion arranged opposite to each other, the third protruding portion being located on a partial side wall of the third supporting portion and protruding toward the fourth supporting portion, the fourth protruding portion being located on a partial side wall of the fourth supporting portion and protruding toward the third supporting portion, the second protruding structure being located between the color combining device and the imaging cover plate; the color combining device being connected to one or both of the second supporting structure and the second protruding structure; and the imaging cover plate being connected to one or both of the second supporting structure and the second protruding structure.

[0098] 6 and 7 are schematic structural diagrams of a Micro-LED display panel according to another embodiment of the present invention.

[0099] The main differences between this embodiment and the previous embodiment are:

[0100] The imaging cover plate is only located on the light emitting area. Please refer to FIG. 6 and FIG. 7 for details.

[0101] Please refer to Figures 6 and 7, Figure 6 is a schematic diagram of the top view structure, and Figure 7 is a schematic diagram of the cross-sectional structure along the EE1 direction in Figure 6. The Micro-LED display panel includes: a chip structure 701, the chip structure 701 includes a Micro-LED display chip, and the chip structure 701 has a light-emitting surface 701a; an imaging cover plate 702 located on the light-emitting surface 701a of the chip structure 701, and the imaging cover plate 702 is used to converge or diverge the light emitted by the chip structure 701.

[0102] In this embodiment, the Micro-LED display chip 701 includes a light-emitting area I and a non-light-emitting area II; the imaging cover plate 702 is located on the light-emitting area I.

[0103] Correspondingly, another embodiment of the present invention further provides a color light engine. Please refer to the previous embodiment for a detailed description, which will not be repeated here.

[0104] FIG8 is a schematic structural diagram of a Micro-LED display panel according to another embodiment of the present invention.

[0105] The main differences between this embodiment and the previous embodiment are:

[0106] There is a certain distance between the imaging cover plate and the Micro-LED display chip, and the distance is less than or equal to 0.5 mm. Please refer to Figure 8 for details.

[0107] Please refer to Figure 8. The Micro-LED display panel includes: a chip structure 801, wherein the chip structure 801 includes a Micro-LED display chip, and the chip structure 801 has a light-emitting surface 801a; an imaging cover plate 802 located on the light-emitting surface 801a of the chip structure 801, and the imaging cover plate 802 is used to converge or diverge the light emitted by the chip structure 801.

[0108] In this embodiment, the imaging cover plate 802 and the chip structure 801 are connected by gluing.

[0109] Adopting the gluing fixing method can make the air gap between the imaging cover plate 802 and the chip structure 801 smaller, or even eliminate the air gap, thereby improving the transmittance of the light emitted by the chip structure 801 and reducing the influence of the temperature and humidity of the surrounding environment.

[0110] In this embodiment, the thickness of the optical adhesive layer 803 between the imaging cover plate 802 and the chip structure 801 ranges from 0.05 mm to 0.3 mm.

[0111] In this embodiment, the thickness of the optical adhesive layer 803 affects the heat dissipation of the Micro-LED display chip. A thicker optical adhesive layer makes it more difficult for the Micro-LED display chip to dissipate heat, which can affect the performance of the Micro-LED display chip. Furthermore, a thicker optical adhesive layer can affect the light transmittance of the Micro-LED display chip, thereby affecting the brightness of the light. Selecting an optical adhesive layer within the above thickness range can not only secure the imaging cover plate, but also ensure heat dissipation and light transmittance of the Micro-LED display chip.

[0112] In this embodiment, the material of the optical adhesive layer 803 includes transparent optical adhesive, and the transparent optical adhesive includes acrylate, epoxy resin or polyester.

[0113] Selecting transparent optical adhesive for fixation can reduce the impact on the brightness of the light emitted by the chip structure 801.

[0114] In another embodiment, the imaging cover plate and the chip structure are bonded to each other via a bonding layer.

[0115] Correspondingly, another embodiment of the present invention further provides a color light engine. Please refer to the previous embodiment for a detailed description, which will not be repeated here.

[0116] FIG9 is a schematic structural diagram of a Micro-LED display panel according to another embodiment of the present invention.

[0117] The main differences between this embodiment and the previous embodiment are:

[0118] The edge surface of the imaging cover plate is connected to the surface of the chip structure. Please refer to FIG9 for details.

[0119] Please refer to Figure 9. The Micro-LED display panel includes: a chip structure 901, wherein the chip structure 801 includes a Micro-LED display chip, and the chip structure 901 has a light-emitting surface 901a; an imaging cover plate 902 located on the light-emitting surface 901a of the chip structure 901, and the imaging cover plate 902 is used to converge or diverge the light emitted by the chip structure 901.

[0120] In this embodiment, the imaging cover plate 902 and the chip structure 901 are bonded to each other via a bonding layer; the thickness of the bonding layer 903 ranges from 0.5 μm to 3 μm; and the material of the bonding layer 903 includes silicon oxide.

[0121] The reason for selecting the thickness range of the bonding layer 903 is that the thickness of the bonding layer 903 will affect the heat dissipation of the Micro-LED display chip. The thicker the bonding layer 903 is, the less likely the Micro-LED display chip is to dissipate heat, which affects the performance of the Micro-LED display chip. Conversely, if the bonding layer 903 is thinner, the reliability of the bonding will be affected.

[0122] In another embodiment, the imaging cover plate and the chip structure are connected by bonding.

[0123] Correspondingly, another embodiment of the present invention further provides a color light engine. Please refer to the previous embodiment for a detailed description, which will not be repeated here.

[0124] Correspondingly, another embodiment of the present invention further provides an electronic device, including: the color light engine as described above. For a detailed description, please refer to the previous embodiment and will not be repeated here.

[0125] FIG10 is a schematic structural diagram of a Micro-LED display panel according to another embodiment of the present invention.

[0126] The main difference between this embodiment and the previous embodiment is that the first connection mode is different.

[0127] In this embodiment, the imaging cover plate and the chip structure are connected via a supporting member.

[0128] Please refer to Figure 10, the supporting member includes: a supporting structure 30, the supporting structure 30 includes a first supporting portion 303 and a second supporting portion 304 arranged opposite to each other, and the chip structure 301 and the imaging cover plate 302 are both located between the first supporting portion 303 and the second supporting portion 304.

[0129] The chip structure 301 and the supporting member are connected by a second fixing method, which includes gluing, bonding or clamping. The imaging cover plate 302 and the supporting member are connected by a third fixing method, which includes gluing, bonding or clamping.

[0130] In this embodiment, the second fixing method and the third fixing method are both gluing.

[0131] In this embodiment, the supporting member also includes: a protruding structure 31, the protruding structure 31 includes a first protruding portion 305 and a second protruding portion 306 that are relatively arranged, the first protruding portion 305 is located on a partial side wall of the first supporting portion 303 and protrudes toward the second supporting portion 304, the second protruding portion 306 is located on a partial side wall of the second supporting portion 304 and protrudes toward the first supporting portion 303, and the protruding structure is located between the chip structure 301 and the imaging cover plate 302.

[0132] In other embodiments, the supporting member may include only the first supporting portion and the second supporting portion.

[0133] The chip structure 301 is connected to one or both of the support structure 30 and the protruding structure 31 ; the imaging cover plate 302 is connected to one or both of the support structure 30 and the protruding structure 31 .

[0134] In this embodiment, the chip structure 301 is connected to the support structure 30 and the protruding structure 31 ; and the imaging cover plate 302 is connected to the protruding structure 31 .

[0135] Specifically, the chip structure 301 is glued to the support structure 30 and the protruding structure 31 , and the imaging cover plate 302 is glued to the protruding structure 31 .

[0136] In this embodiment, the distance between the imaging cover plate 302 and the chip structure 301 ranges from 0.1 mm to 0.5 mm.

[0137] In this embodiment, the material of the support member includes an injection molding material. The support member can be prepared by an injection molding process.

[0138] Specifically, the injection molding material may include PC resin material or epoxy resin material.

[0139] Correspondingly, an embodiment of the present invention further provides a color light engine. For detailed description, please refer to the previous embodiment and will not be repeated here.

[0140] For ease of understanding, several other typical structures of different types of imaging cover plates are illustrated below, with reference to FIG. 11 to FIG. 13 .

[0141] FIG11 is a schematic structural diagram of a Micro-LED display panel according to another embodiment of the present invention.

[0142] Please refer to FIG. 11 , the Micro-LED display panel includes a chip structure 401 and an imaging cover plate 402 .

[0143] In this embodiment, the imaging cover plate 402 is a negative lens, specifically, a plano-concave lens.

[0144] In other embodiments, the negative lens may also be a biconcave lens or a concave-convex negative lens.

[0145] FIG12 is a schematic structural diagram of a Micro-LED display panel according to another embodiment of the present invention.

[0146] Please refer to FIG. 12 , the Micro-LED display panel includes a chip structure 501 and an imaging cover plate 502 .

[0147] In this embodiment, the imaging cover plate 502 is a cemented negative lens, specifically, a plano-concave lens 5021 and a bi-concave lens 5022 , which are cemented together to form a total of two lenses.

[0148] In other embodiments, the cemented negative lens includes a lens formed by cementing at least two of a plano-concave lens, a bi-concave lens, and a concave-convex negative lens.

[0149] FIG13 is a schematic structural diagram of a Micro-LED display panel according to another embodiment of the present invention.

[0150] Please refer to FIG. 13 , the Micro-LED display panel includes a chip structure 601 and an imaging cover plate 602 .

[0151] In this embodiment, the imaging cover plate 602 is a cemented positive lens, specifically, a concave-convex positive lens 6021 and a meniscus lens 6022, which are cemented together to form a total of two lenses.

[0152] In other embodiments, the cemented positive lens includes a lens formed by cementing at least two of the following lenses: a plano-convex lens, a biconvex lens, a meniscus lens, and a concave-convex positive lens.

[0153] An embodiment of the present invention further provides a color light engine, the main difference from the above-mentioned color light engine is whether an imaging cover can be added to the Micro-LED display panel obtained by the prior art to obtain the color light engine in the technical solution of the present invention.

[0154] The details will be explained below.

[0155] FIG14 is a schematic structural diagram of a color light engine according to another embodiment of the present invention.

[0156] Please refer to Figure 14. The color light engine includes: a light-emitting component, which includes at least two light-emitting elements 211. Each of the light-emitting elements 211 includes a Micro-LED display chip (not shown in the figure) and a light-transmitting packaging cover plate (not shown in the figure) packaged on the light-emitting surface of the Micro-LED display chip. The light emitted by different light-emitting elements 211 has different colors; a color combining device 212, which has an exit surface (not shown in the figure) and at least two incident surfaces (not shown in the figure). Each incident surface is opposite to each light-emitting element 211, so that the light emitted by each light-emitting element 211 enters the color combining device 212. 2 is used to combine light and emit light from the exit surface; an optical imaging device, the optical imaging device including a first imaging component and a second imaging component 213, the first imaging component being located between the light-emitting component and the color combining device 212, the first imaging component including an imaging cover plate 214 located between at least one of the light-emitting elements 211 and the color combining device 212, the imaging cover plate 214 being used to converge or diverge the light emitted by the corresponding light-emitting element 211, the second imaging component 213 being opposite to the exit surface of the color combining device 212, and being used to, after acquiring the light emitted from the exit surface of the color combining device 212, emit the light through the second imaging component 213 and form an image.

[0157] At this point, the imaging cover plate 214 is used to converge or diverge the light emitted by the corresponding light-emitting element 211, which can reduce the "back focal length" of the optical system of the color light engine. Therefore, while increasing the field of view of the color light engine, the size of the color combining device 212 can be maintained, thereby avoiding the problem of mutual interference between the light-emitting elements generated when assembling the color light engine.

[0158] It should be noted that conventional Micro-LED display panels typically include a Micro-LED display chip and a light-transmitting encapsulation cover plate encapsulated on the light-emitting surface of the Micro-LED display chip. Therefore, an imaging cover plate can be added to the conventional Micro-LED display panel to obtain the color light engine of the present invention.

[0159] In this embodiment, the viewing angle of the color light engine can be increased to 80°.

[0160] The Micro-LED display chip includes a light-emitting area (not shown in the figure) and a non-light-emitting area (not shown in the figure).

[0161] In this embodiment, the imaging cover plate 214 is located on the surface of the light-transmitting encapsulation cover plate in both the luminous and non-luminous areas. That is, the imaging cover plate 214 covers the entire Micro-LED display chip. In another embodiment, the imaging cover plate is located only on the surface of the light-transmitting encapsulation cover plate in the luminous area.

[0162] In this embodiment, the light-emitting assembly includes three light-emitting elements 211, each of which is configured to generate monochromatic light, and the monochromatic light emitted by different light-emitting elements 211 has different colors. Specifically, one of the light-emitting elements 211 is configured to generate green light, another light-emitting element 211 is configured to generate blue light, and yet another light-emitting element 211 is configured to generate red light.

[0163] In another embodiment, the light-emitting component includes two light-emitting elements, one of which is used to generate two-color light, and the other is used to generate a first monochromatic light, the two-color light includes two second monochromatic lights of different colors, and the first monochromatic light is different from the second monochromatic light in color.

[0164] In this embodiment, the color combining device 212 includes a color combining prism.

[0165] Specifically, the color combining prism includes four right-angle prisms, the right-angled surfaces of the four right-angle prisms are aligned and bonded to each other, and the oblique surfaces of the four right-angle prisms constitute the four surfaces of the color combining prism, including the incident surface and the exit surface.

[0166] More specifically, in this embodiment, the four surfaces of the color combining prism include three incident surfaces and one exit surface.

[0167] In another embodiment, the four surfaces may include two incident surfaces and one exit surface.

[0168] In this embodiment, the length of the edge of the color combining prism ranges from 3 mm to 15 mm.

[0169] In this embodiment, two of the three light-emitting elements 211 are located on either side of the color combining device 212 in a first direction X, and the remaining light-emitting element 201 and the second imaging assembly 213 are located on either side of the color combining device 212 in a second direction Y. The first direction X and the second direction Y are perpendicular to each other. The color combining device 212 can adjust the light emitted by two of the light-emitting elements 211 so that it enters the second imaging assembly 213 together with the light emitted by the remaining light-emitting element 211.

[0170] In another embodiment, preferably, the light-emitting element for generating the first monochromatic light is located on one side of the color combining device in the first direction, and the light-emitting element for generating the two-color light and the second imaging component are located on both sides of the color combining device in the second direction, respectively, and the first direction and the second direction are perpendicular to each other. When the light-emitting element for generating the first monochromatic light and the second imaging component are respectively placed on both sides of the color combining device in the second direction, and the light-emitting element for generating the two-color light is placed on one side of the color combining device in the first direction, or when the light-emitting element generating the first monochromatic light and the light-emitting element generating the two-color light are placed on both sides of the color combining device in the first direction, the color combining device needs to be adjusted accordingly to change the propagation direction of the light emitted by the light-emitting element generating the two-color light, so that the three-color light generated by the two light-emitting elements all enter the second imaging component.

[0171] In this embodiment, the first imaging assembly includes an imaging cover plate 214 located between one of the light-emitting elements 211 and the color combining device 212. In a practical application scenario, for example, to improve the imaging capability of red light, the imaging cover plate can be disposed between the light-emitting element generating red light and the color combining device.

[0172] In other embodiments, the first imaging assembly may include two or more imaging cover plates. For example, when the light-emitting assembly includes three light-emitting elements, an imaging cover plate may be provided between each light-emitting element and the color combining device, or between two of the light-emitting elements and the color combining device. Furthermore, the imaging cover plates between different light-emitting elements and the color combining device may be the same or different.

[0173] More optimally, an imaging cover plate is provided between each of the light-emitting elements and the color combining device, and the imaging cover plates between each of the light-emitting elements and the color combining device are the same.

[0174] In this embodiment, the imaging cover plate 214 is a positive lens. In other embodiments, the imaging cover plate may also be a negative lens.

[0175] It should be noted that the first imaging component and the second imaging component 213 cooperate with each other to form an image.

[0176] In this embodiment, the size of the second imaging component 213 along its optical axis ranges from 2 mm to 10 mm.

[0177] The positive lens includes a plano-convex lens, a biconvex lens, a meniscus lens, a concave-convex positive lens or a cemented positive lens; the cemented positive lens includes a lens formed by cementing at least two of the plano-convex lens, the biconvex lens, the meniscus lens and the concave-convex positive lens.

[0178] In this embodiment, the lens is a plano-convex lens. In other embodiments, the lens may also be a biconvex lens, a meniscus lens, a concave-convex positive lens, or a cemented positive lens.

[0179] The negative lens includes a plano-concave lens, a biconcave lens, a concave-convex negative lens or a cemented negative lens; the cemented negative lens includes a lens formed by cementing at least two of the plano-concave lens, the biconcave lens and the concave-convex negative lens.

[0180] In this embodiment, the size of the light emitting element 211 ranges from 0.05 inches to 0.5 inches.

[0181] In this embodiment, the size of the imaging cover plate 214 in a direction perpendicular to its optical axis ranges from 1 mm to 20 mm.

[0182] The distance between the imaging cover plate 214 and the corresponding light emitting element 211 is less than or equal to 0.5 mm.

[0183] The imaging cover plate 214 is connected to the corresponding light-emitting element 211 via a first fixing method, and the imaging cover plate 214 is connected to the color combining device 212 via a fourth fixing method. The different fixing methods between the imaging cover plate 214 and the light-emitting element 211 result in different limits on the distance between them.

[0184] In this embodiment, the first fixing method includes: the imaging cover plate 214 is fixed between the color combining device 212 and the corresponding light emitting element 211 through a first supporting member; the distance between the imaging cover plate 214 and the corresponding light emitting element 211 ranges from 0.15 mm to 0.5 mm.

[0185] Please refer to FIG15 for the structure of the first supporting member.

[0186] FIG. 15 is a schematic structural diagram of a first supporting member in a color light engine according to another embodiment of the present invention.

[0187] Please refer to Figure 15, the first supporting member includes: a first supporting structure B0, the first supporting structure B0 includes a first supporting portion 311 and a second supporting portion 312 arranged opposite to each other, and the light emitting element 211 and the imaging cover plate 214 are both located between the first supporting portion 311 and the second supporting portion 312.

[0188] The imaging cover plate 214 and the first supporting member are connected by a second fixing method, which includes gluing, bonding or clamping; the light emitting element 211 and the first supporting member are connected by a third fixing method, which includes gluing, bonding or clamping.

[0189] In this embodiment, the second fixing method and the third fixing method are both gluing.

[0190] In this embodiment, the first supporting member further includes: a first protruding structure B1, the first protruding structure B1 includes a first protruding portion 313 and a second protruding portion 314 that are oppositely arranged, the first protruding portion 313 is located on a partial side wall of the first supporting portion 311 and protrudes toward the second supporting portion 312, the second protruding portion 314 is located on a partial side wall of the second supporting portion 312 and protrudes toward the first supporting portion 311, and the first protruding structure B1 is located between the light-emitting element 211 and the imaging cover plate 214.

[0191] In other embodiments, the first supporting member may include only the first supporting portion and the second supporting portion.

[0192] The light emitting element 211 is connected to one or both of the first supporting structure B0 and the first protruding structure B1 ; the imaging cover plate 214 is connected to one or both of the first supporting structure B0 and the first protruding structure B1 .

[0193] In this embodiment, the light emitting element 211 is connected to the first supporting structure B0 and the first protruding structure B1 , and the imaging cover plate 214 is connected to the first protruding structure B1 .

[0194] In this embodiment, the material of the first supporting member includes an injection molding material. The first supporting member can be prepared by an injection molding process.

[0195] Specifically, the injection molding material may include PC resin material or epoxy resin material.

[0196] The outline shape of the imaging cover plate 214 can be a circle, a rounded rectangle, or a rectangle, etc., to facilitate fixation.

[0197] In this embodiment, the distance between the imaging cover plate 214 and the color combining device 212 ranges from 0.1 mm to 1 mm.

[0198] In this embodiment, the fourth fixing method includes gluing; a second optical adhesive layer (not shown in the figure) is provided between the imaging cover plate 214 and the color combining device 212; the material of the second optical adhesive layer includes transparent optical adhesive, and the transparent optical adhesive includes acrylate, epoxy resin or polyester.

[0199] The first fixing method and the second fixing method may also be in the following forms:

[0200] In this embodiment, the first fixing method includes: the imaging cover plate 214 is fixed between the color combining device 212 and the corresponding light emitting element 211 through a first supporting member.

[0201] In another embodiment, the first fixing method includes bonding; the imaging cover plate and the corresponding light-emitting element are directly bonded; or, the imaging cover plate and the corresponding light-emitting element are bonded to each other through a first bonding layer; the thickness of the first bonding layer ranges from 0.5μm to 3μm.

[0202] In another embodiment, the first fixing method includes gluing; there is a first optical adhesive layer between the imaging cover plate and the corresponding light-emitting element, and the thickness of the first optical adhesive layer ranges from 0.05 mm to 0.5 mm; the material of the first optical adhesive layer includes transparent optical adhesive, and the transparent optical adhesive includes acrylate, epoxy resin or polyester.

[0203] In this embodiment, the fourth fixing method includes gluing.

[0204] In another embodiment, the fourth fixing manner includes: the imaging cover plate and the color combining device are connected via a second supporting member.

[0205] The second supporting member includes: a second supporting structure, the second supporting structure includes a third supporting portion and a fourth supporting portion that are oppositely arranged, and the color combining device and the imaging cover plate are both located between the third supporting portion and the fourth supporting portion.

[0206] The imaging cover plate and the second supporting member are connected by a fifth fixing method, which includes gluing, bonding or clamping; the color combining device and the second supporting member are connected by a sixth fixing method, which includes gluing, bonding or clamping.

[0207] The second supporting member further includes: a second protruding structure, the second protruding structure including a third protruding portion and a fourth protruding portion arranged opposite to each other, the third protruding portion being located on a partial side wall of the third supporting portion and protruding toward the fourth supporting portion, the fourth protruding portion being located on a partial side wall of the fourth supporting portion and protruding toward the third supporting portion, the second protruding structure being located between the color combining device and the imaging cover plate; the color combining device being connected to one or both of the second supporting structure and the second protruding structure; and the imaging cover plate being connected to one or both of the second supporting structure and the second protruding structure.

[0208] Regarding the fourth fixing method, please refer to the description of the first fixing method and will not be repeated here. The first support member and the second support member can be separate from each other, or they can be an integrated structure obtained by the injection molding process, that is, the first support portion and the third support portion are connected, and the second support portion and the fourth support portion are connected.

[0209] In another embodiment, the fourth fixing manner includes bonding; the imaging cover plate and the color combining device are directly bonded; or the imaging cover plate and the color combining device are bonded to each other via a second bonding layer.

[0210] Partial or entire surface of the imaging cover plate 214 is fixed to the corresponding surface of the light emitting element 211 ; partial or entire surface of the imaging cover plate 214 is fixed to the surface of the color combining device 212 ; the partial surface includes the edge surface of the imaging cover plate 214 .

[0211] In this embodiment, edge surfaces of the imaging cover plate 214 are respectively fixed to the corresponding surfaces of the light emitting element 211 and the color combining device 212 .

[0212] It should be noted that, in the same color light engine, the first fixing mode and the fourth fixing mode can be the same or different. For details about the first fixing mode and the fourth fixing mode, please refer to the description of the first fixing mode herein, which will not be repeated here.

[0213] FIG. 16 is a schematic structural diagram of a color light engine according to another embodiment of the present invention.

[0214] In this embodiment, the color light engine includes: a light-emitting component, the light-emitting component includes three light-emitting elements 411, each of the light-emitting elements 411 includes a Micro-LED display chip (not shown in the figure) and a light-transmitting packaging cover plate (not shown in the figure) packaged on the light-emitting surface of the Micro-LED display chip, and the light emitted by different light-emitting elements 411 has different colors; a color combining device 412, the color combining device 412 has an exit surface (not shown in the figure) and at least two incident surfaces (not shown in the figure), each of the incident surfaces is opposite to each of the light-emitting elements 411, so that the light emitted by each of the light-emitting elements 411 enters the color combining device, the The color combining device 412 is used to combine light and make the light be emitted from the said exit surface; the optical imaging device includes a first imaging component and a second imaging component 413, the first imaging component includes three imaging cover plates 414, each of the imaging cover plates 414 is located between one of the said light-emitting elements 411 and the said color combining device 412, the imaging cover plates 414 are used to make the light emitted by the corresponding light-emitting element 411 converge or diverge, the second imaging component 413 is opposite to the exit surface of the said color combining device 412, and is used to obtain the light emitted from the exit surface of the said color combining device 412, and then make the light be emitted through the second imaging component 413 and form an image.

[0215] This embodiment differs from the previous embodiment in that the first imaging assembly includes three imaging cover plates 414 .

[0216] FIG17 is a schematic structural diagram of a color light engine according to another embodiment of the present invention.

[0217] In this embodiment, the color light engine includes: a light-emitting component, the light-emitting component includes two light-emitting elements 511, each of the light-emitting elements 511 includes a Micro-LED display chip (not shown in the figure) and a transparent packaging cover plate (not shown in the figure) packaged on the light-emitting surface of the Micro-LED display chip, wherein one of the light-emitting elements 511 is used to generate two-color light, and the other light-emitting element 511 is used to generate a first monochromatic light, the two-color light includes two second monochromatic lights of different colors, and the first monochromatic light and the second monochromatic light have different colors; a color combining device 512, the color combining device 512 has an exit surface (not shown in the figure) and at least two incident surfaces (not shown in the figure), each of the incident surfaces and each light-emitting element 511 are opposite to each other, so that the light emitted by each light-emitting element 511 enters the color combining device, and the color combining device 512 is used to combine light and make the light emitted from the exit surface; an optical imaging device, the optical imaging device includes a first imaging component and a second imaging component 513, the first imaging component includes three imaging cover plates 514, each of the imaging cover plates 514 is located between one of the light-emitting elements 511 and the color combining device 512, and the imaging cover plates 514 are used to converge or diverge the light emitted by the corresponding light-emitting element 511, and the second imaging component 513 is opposite to the exit surface of the color combining device 512, and is used to obtain the light emitted from the exit surface of the color combining device 512, and then make the light be emitted through the second imaging component 513 and form an image.

[0218] In this embodiment, the light-emitting element 511 for generating the first monochromatic light is located on one side of the color combining device in the first direction X, and the light-emitting element 511 for generating the two-color light and the second imaging component 503 are respectively located on both sides of the color combining device in the second direction Y, and the first direction X and the second direction Y are perpendicular to each other.

[0219] The main difference between this embodiment and the previous two embodiments is that the light-emitting assembly includes two light-emitting elements 501 .

[0220] It should be noted that FIG. 14 , FIG. 16 and FIG. 17 are only used to illustrate several typical color light engine structures, but are not limited to the above structures.

[0221] Correspondingly, an embodiment of the present invention further provides an electronic device, including: the color light engine as described above.

[0222] In this embodiment, the electronic device includes a near-eye display device, such as an augmented reality device (AR), a virtual reality device (VR), or a mediated reality device (MR).

[0223] The near-eye device includes a wearable device, and the color light engine is capable of projecting on the wearable device.

[0224] In another embodiment, the electronic device includes a micro-projector.

[0225] The micro projector further includes a projection panel (not shown in the figure), and the color light engine is used for performing projection on the projection panel.

[0226] In the present application, the above-mentioned Micro-LED display panel has a very small volume, and the length and width dimensions are between 500μm and 50,000μm. The area of ​​the light-emitting area of ​​the Micro-LED display panel is very small, such as 1mm×1mm, 2.64mm×2.02mm, 3mm×5mm, etc. The light-emitting area of ​​the Micro-LED display panel includes a plurality of micro LED pixels arranged in an array, and the specific pixel arrangement can be one of 320×240, 640×480, 1600×1200, 1920×1080, and 2560×1440. The size of a single micro LED pixel is between 100nm and 100μm. In some embodiments, the size of a single micro LED pixel is between 150nm and 15μm. In some embodiments, the size of a single micro LED pixel can also be less than 10μm.

[0227] A driver backplane is located behind the micro-LED pixel array. It is electrically connected to the micro-LEDs within the array and receives signals such as image data from the outside world, controlling the corresponding micro-LEDs to illuminate or not illuminate. The driver backplane is typically a TFT (Thin Film Transistor) board or an IC (Integrated Circuit) board.

[0228] For example, the driving backplane of the above-mentioned Micro-LED display panel integrates a frame buffer, a column driving circuit, and a row driving circuit. The frame buffer includes a first pixel storage area, and the micro-LED pixel array includes a second pixel storage area. A complete frame of pixel grayscale data from the outside world can first enter the first pixel storage area of ​​the frame buffer. The column driving circuit can load the pixel grayscale data in the first pixel storage area of ​​the frame buffer into the second pixel storage area of ​​the micro-LED pixel array. The row driving circuit can scan the pixel grayscale data in the second pixel storage area and generate a pulse modulation signal to achieve the purpose of displaying different grayscales. When driving multiple micro-LED pixels in the micro-LED pixel array, it is possible to adopt a single pixel independent driving method or a multiple pixel unit independent driving method. The specific driving method should not constitute a limitation to the present invention.

[0229] It should be noted that the application of the above-mentioned Micro-LED display panel in the present invention should not constitute a limitation on the application of the present invention.

[0230] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope defined by the claims.

Claims

1. A Micro-LED display panel, characterized in that: The chip structure includes a micro-LED display chip and a light emitting surface. An imaging cover plate is located on the light-emitting surface of the chip structure, and is used to converge or diverge the light emitted by the chip structure.

2. The Micro-LED display panel according to claim 1, wherein: The chip structure further includes a light-transmitting packaging cover plate packaged on the surface of the Micro-LED display chip, and the light-transmitting packaging cover plate is arranged between the Micro-LED display chip and the imaging cover plate.

3. The Micro-LED display panel according to claim 1, wherein: The chip structure includes a light-emitting area and a non-light-emitting area; the imaging cover is located on the light-emitting area.

4. The Micro-LED display panel according to claim 3, wherein: The imaging cover plate is also located on the non-luminous area.

5. The Micro-LED display panel according to claim 1, wherein: The imaging cover plate is a positive lens; the positive lens includes a plano-convex lens, a biconvex lens, a meniscus lens, a concave-convex positive lens or a cemented positive lens; the cemented positive lens includes a lens formed by cementing at least two of the plano-convex lens, the biconvex lens, the meniscus lens and the concave-convex positive lens; or The imaging cover plate is a negative lens; the negative lens includes a plano-concave lens, a biconcave lens, a concave-convex negative lens or a cemented negative lens; the cemented negative lens includes a lens formed by cementing at least two of the plano-concave lens, the biconcave lens and the concave-convex negative lens.

6. The Micro-LED display panel according to claim 1, wherein: The imaging cover plate and the chip structure are connected via a first fixing method.

7. The Micro-LED display panel according to claim 6, wherein: The first fixing method includes bonding; the imaging cover plate and the chip structure are directly bonded; or the imaging cover plate and the chip structure are bonded to each other through a bonding layer; the thickness of the bonding layer ranges from 0.5μm to 3μm; the material of the bonding layer includes silicon oxide.

8. The Micro-LED display panel according to claim 6, wherein: The first fixing method includes gluing; the thickness of the optical adhesive layer between the imaging cover plate and the chip structure ranges from 0.05mm to 0.3mm; the material of the optical adhesive layer includes transparent optical adhesive, and the transparent optical adhesive includes acrylate, epoxy resin or polyester.

9. The Micro-LED display panel according to claim 6, wherein: The first fixing method includes: the imaging cover plate and the chip structure are connected by a supporting member; the supporting member includes: a supporting structure, the supporting structure includes a first supporting part and a second supporting part arranged opposite to each other, and the chip structure and the imaging cover plate are both located between the first supporting part and the second supporting part.

10. The Micro-LED display panel according to claim 9, wherein: The chip structure and the support member are connected by a second fixing method, which includes gluing, bonding or clamping; the imaging cover plate and the support member are connected by a third fixing method, which includes gluing, bonding or clamping.

11. The Micro-LED display panel according to claim 10, wherein: The supporting member also includes: a protruding structure, the protruding structure including a first protruding portion and a second protruding portion arranged opposite to each other, the first protruding portion is located on a partial side wall of the first supporting portion and protrudes toward the second supporting portion, the second protruding portion is located on a partial side wall of the second supporting portion and protrudes toward the first supporting portion, the protruding structure is located between the chip structure and the imaging cover plate; the chip structure is connected to one or both of the supporting structure and the protruding structure; the imaging cover plate is connected to one or both of the supporting structure and the protruding structure.

12. The Micro-LED display panel according to claim 9, wherein: The distance between the imaging cover plate and the chip structure ranges from 0.1 mm to 0.5 mm.

13. The Micro-LED display panel according to claim 6, wherein: A partial surface or the entire surface of the imaging cover plate is connected to the surface of the chip structure; the partial surface includes an edge surface of the imaging cover plate.

14. The Micro-LED display panel according to claim 1, wherein: The distance between the imaging cover plate and the chip structure is less than or equal to 0.5 mm.

15. The Micro-LED display panel according to claim 1, wherein: The size of the Micro-LED display chip in a direction parallel to the light-emitting surface ranges from 0.05 inches to 0.5 inches; the size of the imaging cover plate in a direction perpendicular to its optical axis ranges from 1 mm to 20 mm.

16. The Micro-LED display panel according to claim 1, wherein: The Micro-LED display chip includes: a driving backplane; and a plurality of chip units arranged in an array on the driving backplane, each of the chip units being electrically connected to the driving backplane.

17. The Micro-LED display panel according to claim 1, wherein: The Micro-LED display panel further includes: a support plate, the support plate being located on the non-light-emitting surface of the chip structure, the non-light-emitting surface being opposite to the light-emitting surface; and a circuit board connected to the Micro-LED display chip.

18. A color light engine, characterized in that: include: A light-emitting assembly, comprising at least two light-emitting elements, wherein at least one of the light-emitting elements adopts the Micro-LED display panel according to any one of claims 1 to 17, and the light emitted by different light-emitting elements has different colors; a color combining device, the color combining device having an exit surface and at least two incident surfaces, each incident surface being opposite to each light-emitting element so that light emitted by each light-emitting element enters the color combining device, the color combining device being used to combine light and emit the light from the exit surface; An optical lens is opposite to the exit surface of the color combining device and is used for obtaining the light emitted from the exit surface of the color combining device and then allowing the light to be emitted through the optical lens and formed into an image.

19. The color light engine of claim 18, wherein: The light-emitting component includes two light-emitting elements, one of which is used to generate two-color light, and the other is used to generate a first monochromatic light. The two-color light includes two second monochromatic lights of different colors, and the first monochromatic light is different from the second monochromatic light in color.

20. The color light engine of claim 19, wherein: The light-emitting element for generating the first monochromatic light is located on one side of the color combining device in a first direction, and the light-emitting element and the optical lens for generating the two-color light are respectively located on both sides of the color combining device in a second direction, and the first direction and the second direction are perpendicular to each other.

21. The color light engine of claim 18, wherein: The light-emitting assembly includes three light-emitting elements, each of which is used to generate monochromatic light, and the colors of the monochromatic lights emitted by different light-emitting elements are different.

22. The color light engine of claim 18, wherein: The distance between the Micro-LED display panel and the color combining device ranges from 0.1 mm to 1 mm.

23. The color light engine of claim 18, wherein: The size of the optical lens along its optical axis ranges from 2 mm to 10 mm.

24. The color light engine of claim 18, wherein: The color combining device includes a color combining prism; the length of the edge of the color combining prism ranges from 3 mm to 15 mm; the material of the color combining prism includes silicon oxide.

25. The color light engine of claim 24, wherein: In the color-combining prism, the material of the reflective film includes an inorganic oxide, and the inorganic oxide includes silicon oxide, aluminum oxide or titanium oxide; the reflectivity of the reflective film to the light emitted by the light-emitting element is greater than 95%; the wavelength range of the light emitted by the light-emitting element includes 350nm to 800nm; the thickness range of the reflective film is less than 10μm.

26. A color light engine, characterized in that: include: The light-emitting component comprises at least two light-emitting elements, each of which The component includes a Micro-LED display chip and a light-transmitting packaging cover plate packaged on the light-emitting surface of the Micro-LED display chip, and the light emitted by different light-emitting elements has different colors; a color combining device, the color combining device having an exit surface and at least two incident surfaces, each incident surface being opposite to each light emitting element so as to allow light emitted by each light emitting element to enter, and the color combining device being used to combine the light so that the light is emitted from the exit surface; An optical imaging device, comprising a first imaging component and a second imaging component, wherein the first imaging component is located between the light-emitting component and the color combining device, the first imaging component comprising an imaging cover plate located between at least one of the light-emitting elements and the color combining device, the imaging cover plate being configured to converge or diverge light emitted by the corresponding light-emitting element, and the second imaging component being opposite to the exit surface of the color combining device, configured to, after acquiring light emitted from the exit surface of the color combining device, emit the light through the second imaging component and form an image.

27. An electronic device, characterized in that: include: A color light engine as claimed in any one of claims 18 to 26.

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