Micro-projection optical engine, and electronic device

Abstract

A micro-projection optical engine and an electronic device, which relate to the technical field of display. The micro-projection optical engine comprises: a light-combining assembly, which comprises a light-emergent surface and at least one light-incident surface; at least one micro-display panel, which is arranged around the light-combining assembly and comprises a display portion, the display portion of the at least one micro-display panel corresponding to the at least one light-incident surface, and light emitted from the display portion of the at least one micro-display panel entering the light-combining assembly through the at least one light-incident surface and then exiting through the light-emergent surface; and a lens assembly, which corresponds to the light-emergent surface, with the light emitted out through the light-emergent surface passing through the lens assembly and then being emitted to the outside, and the lens assembly being configured to collimate the light emitted out through the light-emergent surface. By means of arranging the at least one micro-display panel around the light-combining assembly, the overall space occupied by the light-combining assembly and the at least one micro-display panel can be effectively reduced, thereby facilitating a reduction in the volume of the micro-projection optical engine.

Description

Micro-projection optical machine and electronic equipment

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on March 23, 2024, with application number 2024103400141 and invention name “Microprojection Optical Machine and Electronic Equipment”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present invention relates to the field of display, and in particular to a micro-projection optical machine and electronic equipment. Background Art

[0003] In recent years, with the continuous development of Micro LED (Micro Light Emitting Diode Display) technology, more and more electronic devices have begun to use Micro LED technology, bringing great convenience to people's lives.

[0004] Currently, in practical applications, micro-display panels composed of Micro LEDs are often assembled with lenses and other structures to form an optical machine (or light engine). Solving the problem of assembling these micro-display panels with lenses and other structures is one of the most pressing issues.

[0005] Furthermore, with the miniaturization of electronic devices, the miniaturization of the optical-mechanical structure of micro-projection optical engines has also become one of its trends. Especially in wearable electronic devices, miniaturization and lightweighting of micro-projection optical engines are also one of the issues that need to be solved urgently.

[0006] Summary of the Invention

[0007] The technical problem solved by the present invention is to provide a micro-projection optical machine and electronic equipment to reduce the volume of the micro-projection optical machine.

[0008] To solve the above problems, the technical solution of the present invention provides a micro-projection optical machine, comprising: a light combining component, the light combining component including a light emitting surface and at least one light incident surface; at least one micro-display panel, the at least one micro-display panel is arranged to surround the light combining component, the micro-display panel includes a display part, the display part of at least one micro-display panel corresponds to at least one light incident surface, and the light emitted by the display part of at least one micro-display panel enters the light combining component through at least one light incident surface and is emitted through the light emitting surface; a lens assembly, the lens assembly corresponds to the light emitting surface, the light emitted from the light emitting surface is emitted to the outside through the lens assembly, and the lens assembly is used to collimate the light emitted from the light emitting surface.

[0009] Optionally, it also includes: a mounting frame, the mounting frame has a mounting space, the side of the mounting space has a light outlet and at least one light inlet connected to the mounting space; the light combining component is assembled and fixed in the mounting space, at least one light entrance surface corresponds to at least one light entrance, and the light exit surface corresponds to the light exit; the display part of at least one micro display panel corresponds one-to-one to at least one light entrance of the mounting frame, and the display part of at least one micro display panel is respectively fixedly connected to the side of the mounting frame having the light entrance; the lens assembly corresponds to the light exit of the mounting frame, and the lens assembly is fixedly connected to the side of the mounting frame having the light exit.

[0010] Optionally, along the light emitting direction of the lens assembly, the thickness of the lens assembly is less than half the width of the mounting frame.

[0011] Optionally, the diameter of the lens assembly is greater than half the length of the mounting frame, and the diameter of the lens assembly is smaller than the length of the mounting frame, and the length of the mounting frame is perpendicular to the light emitting direction of the lens assembly.

[0012] Optionally, the micro display panel further includes: a circuit board and a connector portion, one end of the circuit board is electrically connected to the display portion, and the other end of the circuit board is electrically connected to the connector portion.

[0013] Optionally, at least one microdisplay panel includes: a first microdisplay panel and at least two second microdisplay panels; wherein, the connector portion of the first microdisplay panel includes at least two first connectors located on the same side; the connector portion of the second microdisplay panel includes a second connector; and the second connectors of the at least two second microdisplay panels are electrically connected to the at least two first connectors of the first microdisplay panel in a one-to-one correspondence.

[0014] Optionally, the mounting frame has a retaining side surface, and the retaining side surface is respectively perpendicular to the side surface of the mounting frame having the light entrance and the side surface of the light exit.

[0015] Optionally, the display portion of the first microdisplay panel and the display portions of at least two second microdisplay panels correspond one-to-one to at least one light entrance of the mounting frame; the circuit boards of at least two second microdisplay surfaces are stacked alternately on the fixed side of the mounting frame, and the second connectors of at least two second microdisplay panels extend to the side of the mounting frame where the first microdisplay panel is fixed, and are electrically connected one-to-one to the at least two first connectors of the first microdisplay panel.

[0016] Optionally, the second connectors of at least two second micro display panels are not located in the same plane.

[0017] Optionally, the second connectors of at least two second micro display panels are arranged in parallel.

[0018] Optionally, at least two first connectors of the first micro display panel and at least two second connectors of the second micro display panel are arranged on a side of the display portion of the first micro display panel away from the light combining assembly.

[0019] Optionally, the first micro display panel further includes an external connector, and the external connector of the first micro display panel and the at least two first connectors of the first micro display panel are arranged on different and opposite surfaces of the first micro display panel.

[0020] Optionally, a guide angle for guiding the installation space is provided on the edge of each light entrance.

[0021] Correspondingly, the technical solution of the present invention also provides a micro-projection optical machine, including: a micro-display panel, the micro-display panel has a display part; a lens assembly, the lens assembly is fixedly connected to the micro-display panel, the light emitted by the display part of the micro-display panel is emitted to the outside through the lens assembly, and the lens assembly is used to collimate the emitted light; the micro-projection optical machine is used for monochrome fixed-focus projection.

[0022] Optionally, the micro display panel further includes: a circuit board and a connector portion, one end of the circuit board is electrically connected to the display portion, and the other end of the circuit board is electrically connected to the connector portion.

[0023] Optionally, the display portion includes: a display chip and a first reinforcement plate, and the display chip is fixedly connected to the first reinforcement plate.

[0024] Optionally, the connector portion includes: a connector and a second reinforcement plate, and the connector is fixedly connected to the second reinforcement plate.

[0025] Optionally, the micro display panel further includes: a shielding cover, wherein the shielding cover and the connector are respectively arranged on different and opposite surfaces of the second reinforcement plate.

[0026] Correspondingly, the technical solution of the present invention further provides an electronic device, comprising a micro-projection optical engine as described in any one of the technical solutions above.

[0027] Compared with the prior art, the technical solution of the present invention has the following advantages:

[0028] In the micro-projection optical machine of the technical solution of the present invention, by setting at least one micro-display panel around the light-combining component, the space occupied by the light-combining component and at least one micro-display panel as a whole can be effectively reduced, which is conducive to reducing the volume of the micro-projection optical machine.

[0029] Furthermore, the micro-projector includes a mounting frame having a mounting space within which the light combining component is mounted and fixed. The mounting frame protects the light combining component from damage during use, thereby improving the overall strength and durability of the micro-projector.

[0030] Furthermore, along the light-emitting direction of the lens assembly, the thickness of the lens assembly is less than half the width of the mounting frame. Since the size of the light-combining assembly cannot be further compressed, further reducing the size of the lens assembly is conducive to reducing the size of the micro-projection optical machine.

[0031] Furthermore, the diameter of the lens assembly is greater than half the length of the mounting frame, and the diameter of the lens assembly is smaller than the length of the mounting frame, with the length of the mounting frame being perpendicular to the light emission direction of the lens assembly. When the diameter of the lens assembly is less than half the length of the mounting frame, the light throughput and brightness of the micro-projection machine are likely to be insufficient, thus failing to meet the basic application requirements of AR products. When the diameter of the lens assembly is greater than the length of the mounting frame, the bonding between the lens assembly and the mounting frame is poor, reducing the strength of the micro-projection machine.

[0032] Furthermore, the display portion of the first micro-display panel and the display portions of at least two second micro-display panels correspond one-to-one with at least one light inlet of the mounting frame; the circuit boards of the at least two second micro-display surfaces are stacked and arranged in a staggered manner on the retaining side surface of the mounting frame, and the second connectors of the at least two second micro-display panels extend to the side surface of the mounting frame that secures the first micro-display panel and are electrically connected one-to-one with the at least two first connectors of the first micro-display panel. The staggered stacking arrangement of the circuit boards of the at least two second micro-display surfaces on the retaining side surface of the mounting frame not only ensures the line width of each second micro-display panel circuit board, thereby ensuring conductivity, but also minimizes the space occupied, which helps reduce the volume of the micro-projection optical machine.

[0033] Furthermore, the second connectors of at least two second micro-display panels are not located in the same plane. Since the circuit boards of at least two second micro-display surfaces are stacked and arranged in an interlaced manner on the fixed side of the mounting frame, when the second connectors of at least two second micro-display panels extend to the side of the mounting frame that fixes the first micro-display panel, the arrangement path lengths of the circuit boards of each second micro-display panel are different, which will cause the second connectors of at least two second micro-display panels to not be located in the same plane. In this case, the circuit boards of each second micro-display panel are naturally stretched, and no stress will be generated inside them, and thus the conductive properties of the circuit boards will not be affected. If the second connectors of each second micro-display panel are forced to be in the same plane, part of the circuit boards will inevitably be forced to stretch, thereby generating stress in the circuit boards, which is likely to affect the conductive properties of the circuit boards.

[0034] Furthermore, each light inlet has a guide angle at the edge to guide the mounting space. These guide angles facilitate the alignment of each display unit with the corresponding light incident surface. When the display unit is assembled with the corresponding light inlet, the guide angle creates a gap, making it easier to insert glue when securing the display unit to the mounting frame. This improves the adhesion between the display unit and the mounting frame, thereby enhancing the overall strength of the micro-projector.

[0035] In the micro-projection optical machine of the technical solution of the present invention, since the micro-projection optical machine is used for monochrome fixed-focus projection, the micro-projection optical machine does not need an adapter plate structure for zooming, thereby effectively reducing the volume of the micro-projection optical machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] FIG1 is a schematic diagram of the three-dimensional structure of a micro-projection optical engine according to an embodiment of the present invention from a first viewing angle;

[0037] FIG2 is a schematic diagram of the three-dimensional structure of a micro-projection optical machine according to an embodiment of the present invention from a second viewing angle;

[0038] FIG3 is an exploded view of a light combining component and a micro display panel in a micro-projection optical engine according to an embodiment of the present invention;

[0039] FIG4 is a schematic structural diagram of each micro-display panel in a micro-projection optical machine according to an embodiment of the present invention;

[0040] FIG5 is an exploded view of a lens assembly and a mounting frame in a micro-projection optical machine according to an embodiment of the present invention;

[0041] FIG6 is a side view of a micro-projection optical engine according to an embodiment of the present invention;

[0042] FIG7 is a top view of a micro-projection optical engine according to an embodiment of the present invention;

[0043] FIG8 is a schematic diagram of the projection principle structure of a micro-projection optical machine according to an embodiment of the present invention;

[0044] FIG9 is a schematic diagram of the three-dimensional structure of a micro-projection optical engine according to another embodiment of the present invention from a first viewing angle;

[0045] FIG10 is a schematic diagram of the three-dimensional structure of a micro-projection optical engine according to another embodiment of the present invention from a second viewing angle;

[0046] FIG. 11 is a schematic structural diagram of a micro display panel of a micro projection optical engine according to another embodiment of the present invention. DETAILED DESCRIPTION

[0047] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0048] In the description of the present invention, it should be understood that the terms "upper," "lower," "top," and "bottom" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate description and simplify the present invention. They are not intended to indicate or imply that the positions or elements referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations of the present invention. Furthermore, the terms "first" and "second" are used solely to distinguish an entity or operation from another entity or operation and do not require or imply any actual relationship, order, or relative importance between these entities or operations.

[0049] Figure 1 is a schematic diagram of the three-dimensional structure of a micro-projection optical machine according to an embodiment of the present invention at a first viewing angle; Figure 2 is a schematic diagram of the three-dimensional structure of a micro-projection optical machine according to an embodiment of the present invention at a second viewing angle; Figure 3 is an exploded schematic diagram of a light combining component and a micro-display panel in a micro-projection optical machine according to an embodiment of the present invention; Figure 4 is a schematic diagram of the structure of each micro-display panel in a micro-projection optical machine according to an embodiment of the present invention; Figure 5 is an exploded schematic diagram of a lens assembly and a mounting frame in a micro-projection optical machine according to an embodiment of the present invention; Figure 6 is a side view of a micro-projection optical machine according to an embodiment of the present invention; Figure 7 is a top view of a micro-projection optical machine according to an embodiment of the present invention; and Figure 8 is a schematic diagram of the projection principle structure of a micro-projection optical machine according to an embodiment of the present invention.

[0050] Please refer to Figures 1 and 2. A micro-projection optical machine includes: a light combining component 100, the light combining component 100 includes a light emitting surface 100a and at least one light incident surface; at least one micro-display panel, the at least one micro-display panel is arranged around the light combining component 100, the micro-display panel includes a display portion, the display portion of the at least one micro-display panel corresponds to the at least one light incident surface, and the light emitted by the display portion of the at least one micro-display panel enters the light combining component 100 through the at least one light incident surface and is emitted through the light emitting surface 100a; a lens assembly 200, the lens assembly 200 corresponds to the light emitting surface 100a, the light emitted from the light emitting surface 100a is emitted to the outside through the lens assembly 200, and the lens assembly 200 is used to collimate the light emitted from the light emitting surface 100a.

[0051] By arranging at least one micro-display panel to surround the light-combining assembly 100 , the space occupied by the light-combining assembly 100 and the at least one micro-display panel as a whole can be effectively reduced, which is beneficial to reducing the volume of the micro-projection optical machine.

[0052] Referring to FIG3 , in this embodiment, at least one micro-display panel includes a first micro-display panel 300 and at least two second micro-display panels 400 . For example, one first micro-display panel 300 and two second micro-display panels 400 are used as an example. The display portion of the first micro-display panel 300 is a first display portion 3001 , and the display portions of the two second micro-display panels 400 are second display portions 4001 .

[0053] Referring to Figures 1 and 2, and in conjunction with Figure 5, the micro-projection engine further includes: a mounting frame 500, wherein the mounting frame 500 has a mounting space 500a therein, and a side of the mounting space 500a has a light outlet 500b and at least one light inlet connected to the mounting space 500a; a light combining assembly 100 assembled and fixed within the mounting space 500a, with at least one light inlet surface corresponding to at least one light inlet, and a light outlet surface 100a corresponding to the light outlet 500b; a lens assembly 200 corresponding to the light outlet 500b of the mounting frame 500, and the lens assembly 200 is fixedly connected to the side of the mounting frame 500 having the light outlet 500b. The mounting frame 500 protects the light combining assembly 100 from damage during use, thereby improving the overall strength and durability of the micro-projection engine.

[0054] Continuing to refer to Figures 3 and 5, in this embodiment, since there are three micro-display panels, the corresponding mounting frame 500 also has three light entrances, namely, the light entrances of the mounting frame 500 include: a first light entrance 500c, a second light entrance 500d, and a third light entrance 500e; and the corresponding light-combining assembly 100 also has three light entrance surfaces, namely, the light entrance surfaces of the light-combining assembly 100 include: a first light entrance surface 100b, a second light entrance surface 100c, and a third light entrance surface 100d. The first light entrance 500c corresponds to the first light entrance surface 100b, the second light entrance 500d corresponds to the second light entrance surface 100c, and the third light entrance 500e corresponds to the third light entrance surface 100d.

[0055] Referring to Figure 6 , in this embodiment, along the light-emitting direction X of the lens assembly 200, the thickness dimension d1 of the lens assembly 200 is less than half the width dimension d2 of the mounting frame 500. Since the size of the light-combining assembly 100 cannot be further compressed, further reducing the volume of the lens assembly 200 can help reduce the volume of the micro-projection engine.

[0056] Continuing with FIG2 , in this embodiment, the diameter d3 of the lens assembly 200 is greater than half the length d4 of the mounting frame 500 , and the diameter d3 of the lens assembly 200 is smaller than the length d4 of the mounting frame 500 . The length d4 of the mounting frame 500 is perpendicular to the light-emitting direction X of the lens assembly 200 . When the diameter d3 of the lens assembly 200 is smaller than half the length d4 of the mounting frame 500 , the light throughput and brightness of the micro-projection machine are likely to be insufficient, thereby failing to meet the basic application requirements of AR products. When the diameter d3 of the lens assembly 200 is greater than the length d4 of the mounting frame 500 , the bonding between the lens assembly 200 and the mounting frame 500 is poor, reducing the strength of the micro-projection machine.

[0057] The micro display panel further includes: a circuit board and a connector portion, one end of the circuit board is electrically connected to the display portion, and the other end of the circuit board is electrically connected to the connector portion.

[0058] Continuing to refer to FIG. 3 and in conjunction with FIG. 4 , in this embodiment, the circuit board of the first microdisplay panel 300 is a first circuit board 3002, the circuit boards of the two second microdisplay panels 400 are second circuit boards 4002, the connector portion of the first microdisplay panel 300 is a first connector portion 3003, and the connector portions of the two second microdisplay panels 400 are second connector portions 4003. Specifically, one end of the first circuit board 3002 is electrically connected to the first display portion 3001, and the other end of the first circuit board 3002 is electrically connected to the first connector portion 3003; one end of the second circuit board 4002 is electrically connected to the second display portion 4001, and the other end of the second circuit board 4002 is electrically connected to the second connector portion 4003.

[0059] In this embodiment, all three microdisplay panels are monochrome microdisplay panels. For example, the three microdisplay panels are a red microdisplay panel, a blue microdisplay panel, and a green microdisplay panel. For example, the first microdisplay panel 300 can be a red microdisplay panel, and the two second microdisplay panels 400 can be a blue microdisplay panel and a green microdisplay panel, respectively. Accordingly, the first display portion 3001 of the first microdisplay panel 300 generates red light. The second display portions 4001 of the two second microdisplay panels 400 generate blue light and green light, respectively.

[0060] The connector portion of the first micro display panel 300 includes at least two first connectors located on the same side; the connector portion of the second micro display panel 400 includes a second connector; the second connectors of at least two second micro display panels 400 are electrically connected to the at least two first connectors of the first micro display panel 300 in a one-to-one correspondence.

[0061] Please continue to refer to Figures 3 and 4. In this embodiment, the first connector portion 3003 of the first micro display panel 300 includes two first connectors 30031 located on the same side, and the second connector portion 4003 of each second micro display panel 400 includes a second connector 40031; the second connector 40031 of each second micro display panel 400 is electrically connected to one first connector 30031 in the first micro display panel 300.

[0062] In this embodiment, the first display portion 3001 includes a first display chip 30011 and a first reinforcing plate 30012, with the first display chip 30011 fixedly connected to the first reinforcing plate 30012. The first connector portion 3003 also includes a second reinforcing plate 30032, with two first connectors 30031 fixedly connected to the second reinforcing plate 30032. The first circuit board 3002 is a flexible circuit board, allowing the angle between the first reinforcing plate 30012 and the second reinforcing plate 30032 to be adjusted according to usage requirements.

[0063] In this embodiment, the first micro display panel 300 is linear.

[0064] Continuing with Figure 4 , in this embodiment, the second display portion 4001 includes a second display chip 40011 and a third reinforcing plate 40012, with the second display chip 40011 fixedly connected to the third reinforcing plate 40012. The second connector portion 4003 also includes a fourth reinforcing plate 40032, with the second connector 40031 fixedly connected to the fourth reinforcing plate 40032. The second circuit board 4002 is a flexible circuit board, allowing the angle between the third reinforcing plate 40012 and the fourth reinforcing plate 40032 to be adjusted according to usage needs.

[0065] In this embodiment, both of the two second micro display panels 400 are “L”-shaped.

[0066] Continuing with FIG. 4 , in this embodiment, the two second micro-display panels 400 can be configured with shielding covers 4004. The shielding covers 4004 and the second connectors 40031 are disposed on opposite sides of the fourth reinforcing plate 40032. The shielding covers 4004 can shield and protect the electronic components of the second connectors 40031, thereby reducing interference from the external environment on the electronic components of the second connectors 40031.

[0067] Please continue to refer to Figures 1 and 5. The mounting frame 500 has a retaining side 500f, which is respectively perpendicular to the side of the mounting frame 500 having the light entrance and the side of the light exit 500b; the display portion of the first micro display panel 300 and the display portions of at least two second micro display panels 400 correspond one-to-one to at least one light entrance of the mounting frame 500; the circuit boards of at least two second micro display surfaces are staggered and stacked on the retaining side 500f of the mounting frame 500, and the second connectors 40031 of at least two second micro display panels 400 extend to the side of the mounting frame 500 where the first micro display panel 300 is fixed, and are electrically connected one-to-one to the at least two first connectors 30031 of the first micro display panel 300.

[0068] At least two circuit boards of the second micro-display surfaces are stacked in an alternating manner on the retaining side 500f of the mounting frame 500. This not only ensures the line width of the circuit board of each second micro-display panel 400, thereby ensuring the conductive performance, but also the cross-stacking arrangement can minimize the occupied space, which is beneficial to reducing the volume of the micro-projection optical machine.

[0069] Please continue to refer to Figures 1 and 5. In this embodiment, the first display portion 3001 of the first micro display panel 300 corresponds to the first light entrance 500c, and the first display portion 3001 of the first micro display panel 300 is fixedly connected to the side of the mounting frame 500 having the first light entrance 500c, and the second display portions 4001 of the two second micro display panels 400 respectively correspond to the second light entrance 500d and the third light entrance 500e, and the second display portions 4001 of the two second micro display panels 400 respectively correspond to the side of the mounting frame 500 having the second light entrance 500d and the third light entrance 500e. The second circuit boards 4002 of the two second micro display surfaces are stacked alternately on the retaining side 500f of the mounting frame 500, and the second connectors 40031 of the two second micro display panels 400 extend to the side of the mounting frame 500 where the first micro display panel 300 is fixed, and are electrically connected one-to-one with at least two first connectors 30031 of the first micro display panel 300.

[0070] Referring to FIG. 7 , the second connectors 40031 of at least two second micro display panels 400 are not located on the same plane.

[0071] Because the circuit boards of at least two second micro-display panels are stacked and arranged in an interlaced manner on the retaining side surface 500f of the mounting frame 500, when the second connectors 40031 of the at least two second micro-display panels 400 extend to the side of the mounting frame 500 securing the first micro-display panel 300, the path lengths of the circuit boards of each second micro-display panel 400 differ, resulting in the second connectors 40031 of the at least two second micro-display panels 400 not being located in the same plane. In this situation, the circuit boards of each second micro-display panel 400 stretch naturally, without generating stress within them, and thus without affecting the conductive properties of the circuit boards. However, if the second connectors 40031 of each second micro-display panel 400 are forced to lie in the same plane, some of the circuit boards will inevitably be stretched, generating stress within the circuit boards, which can easily affect the conductive properties of the circuit boards.

[0072] 7 , in this embodiment, the second connectors 40031 of the two second micro display panels 400 are not located on the same plane. There is a height difference d5 between the two, and the height difference d5 is equivalent to the thickness of the second circuit board 4002 .

[0073] Please continue to refer to Figures 1 and 2. The second connectors 40031 of at least two second micro display panels 400 are arranged in parallel; at least two first connectors 30031 of the first micro display panel 300, and the second connectors 40031 of at least two second micro display panels 400 are arranged on the side of the display part of the first micro display panel 300 away from the light combining component 100; the first micro display panel 300 also includes an external connector 3004, and the external connector 3004 of the first micro display panel 300 and the at least two first connectors 30031 of the first micro display panel 300 are arranged on different and opposite surfaces of the first micro display panel 300.

[0074] Please continue to refer to Figures 1 and 2. In this embodiment, the second connectors 40031 of the two second micro display panels 400 are arranged in parallel; the two first connectors 30031 of the first micro display panel 300 and the second connectors 40031 of the two second micro display panels 400 are arranged on the side of the first display portion 3001 of the first micro display panel 300 away from the light combining component 100; the first micro display panel 300 also includes an external connector 3004, and the external connector 3004 of the first micro display panel 300 and the two first connectors 30031 of the first micro display panel 300 are arranged on different and opposite surfaces of the first micro display panel 300.

[0075] 2 , a guide angle 5001 for guiding the installation space 500 a is formed on the edge of each light entrance.

[0076] Each guide angle 5001 can facilitate the guidance of each display part to the corresponding light incident surface. Moreover, after the display part and the corresponding light incident port are assembled, the guide angle 5001 will form a gap, which is convenient for filling glue when fixing the display part and the mounting frame 500, so that the adhesion between the display part and the mounting frame 500 is better, thereby improving the overall strength of the micro-projection optical machine.

[0077] 2 , in this embodiment, edges of the first light entrance 500 c , the second light entrance 500 d , and the third light entrance 500 e are all provided with guide angles 5001 for guiding the installation space 500 a .

[0078] Referring to Figure 8 , in this embodiment, the light combining assembly 100 includes a mirror body 1001, a first semi-reflective semi-transparent membrane 1002, and a second semi-reflective semi-transparent membrane 1003. The first semi-reflective semi-transparent membrane 1002 and the second semi-reflective semi-transparent membrane 1003 are interlaced with each other on the mirror body 1001. Light emitted from the first micro-display panel 300 enters the light combining assembly 100 through the first light incident surface 100b, passes through the first semi-reflective semi-transparent membrane 1002 and the second semi-reflective semi-transparent membrane 1003, and is emitted through the light emitting surface 100a. After light from one of the second micro-display panels 400 enters the light-combining assembly 100 through the second light-incident surface 100c, a portion of the light is first reflected by the first semi-reflective semi-transparent membrane 1002, then passes through the second semi-reflective semi-transparent membrane 1003, and exits through the light-exiting surface 100a. Another portion of the light first passes through the second semi-reflective semi-transparent membrane 1003, then reflects off the first semi-reflective semi-transparent membrane 1002, and exits through the light-exiting surface 100a. After light from another second micro-display panel 400 enters the light-combining assembly 100 through the third light-incident surface 100d, a portion of the light is first reflected by the second semi-reflective semi-transparent membrane 1003, then passes through the first semi-reflective semi-transparent membrane 1002, and exits through the light-exiting surface 100a. Another portion of the light first passes through the second semi-reflective semi-transparent membrane 1003, then reflects off the first semi-reflective semi-transparent membrane 1002, and exits through the light-exiting surface 100a.

[0079] Continuing with FIG8 , in this embodiment, the light combining assembly 100 is in the shape of a cube, such as a rectangular parallelepiped or a cube. For example, the light combining assembly 100 can be formed by splicing four sub-prisms having triangular cross-sections. Sub-semi-reflective and translucent membranes are attached to predetermined surfaces of the four sub-prisms. When the four sub-prisms are spliced ​​together, the sub-semi-reflective and translucent membranes are interconnected to form a first semi-reflective and translucent membrane 1002 and a second semi-reflective and translucent membrane 1003.

[0080] In this embodiment, the first micro display panel 300 and the two second micro display panels 400 have a very small volume, with length and width dimensions ranging from 500 μm to 50,000 μm, and the area of ​​the light emitting region of the first micro display panel 300 and the two second micro display panels 400 is very small, such as 1 mm × 1 mm, 2.64 mm × 2.02 mm, 3 mm × 5 mm, etc.

[0081] In this embodiment, the light-emitting areas of the first micro-display panel 300 and the two second micro-display panels 400 include a plurality of micro-LED pixels arranged in an array. 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 100 nm and 100 microns. For example, the size of a single micro-LED pixel is between 150 nm and 15 microns, or the size of a single micro-LED pixel can be less than 10 microns.

[0082] 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.

[0083] In this embodiment, the driving backplanes of the first micro display panel 300 and the two second micro display panels 400 are integrated with 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, and 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, either a single pixel can be driven independently or multiple pixel units can be driven independently. The specific driving method should not constitute a limitation to this application.

[0084] Figure 9 is a schematic diagram of the three-dimensional structure of a micro-projection optical machine at a first viewing angle according to another embodiment of the present invention; Figure 10 is a schematic diagram of the three-dimensional structure of a micro-projection optical machine at a second viewing angle according to another embodiment of the present invention; and Figure 11 is a schematic diagram of the structure of a micro-display panel of a micro-projection optical machine according to another embodiment of the present invention.

[0085] Please refer to Figures 9 to 11. In an embodiment of the present invention, a micro-projection optical machine is also provided, including: a micro-display panel 600, the micro-display panel 600 has a display portion 6001; a lens assembly 700, the lens assembly 700 is fixedly connected to the micro-display panel 600, and the light emitted by the display portion 6001 of the micro-display panel 600 is emitted to the outside through the lens assembly 700, and the lens assembly 700 is used to collimate the emitted light; the micro-projection optical machine is used for monochrome fixed-focus projection.

[0086] Since the micro-projection optical engine is used for monochrome fixed-focus projection, there is no need for an adapter plate structure for zooming in the micro-projection optical engine, which can effectively reduce the size of the micro-projection optical engine.

[0087] Please continue to refer to Figures 9 to 11. In this embodiment, the micro display panel 600 further includes: a circuit board 6002 and a connector portion 6003. One end of the circuit board 6002 is electrically connected to the display portion 6001, and the other end of the circuit board 6002 is electrically connected to the connector portion 6003.

[0088] Continuing with Figures 9 to 11 , in this embodiment, the display portion 6001 includes a display chip 60011 and a first reinforcing plate 60012, with the display chip 60011 fixedly connected to the first reinforcing plate 60012. The connector portion 6003 includes a connector 60031 and a second reinforcing plate 60032, with the connector 60031 fixedly connected to the second reinforcing plate 60032. One end of the circuit board 6002 is electrically connected to the display chip 60011, and the other end of the circuit board 6002 is electrically connected to the connector 60031. The connector 60031 is adapted to connect to an external power source or signal source to supply power to the display chip 60011 or input display signals.

[0089] 9 to 11 , in this embodiment, the circuit board 6002 is a flexible circuit board 6002 , so that the angle between the first reinforcing plate 60012 and the second reinforcing plate 60032 can be adjusted according to usage requirements.

[0090] In this embodiment, the display chip 60011 includes a Micro LED array, and the area of ​​the light-emitting region is between 0.5 inches and 3 inches.

[0091] In this embodiment, the light emitting area size of the display chip 60011 is 2.64 mm×2.02 mm.

[0092] In this embodiment, the micro display panel 600 can be configured with a shielding cover 6004, which is disposed on opposite sides of the second reinforcing plate 60032. The shielding cover 6004 can shield and protect the electronic components of the connector, thereby reducing interference from the external environment on the electronic components of the connector.

[0093] Correspondingly, the technical solution of the present invention further provides an electronic device, comprising a micro-projection optical engine as described in any one of the above embodiments.

[0094] 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-projection optical machine, characterized in that: include: A light combining component, comprising a light emitting surface and at least one light incident surface; At least one micro-display panel, the at least one micro-display panel being disposed around the light-combining assembly, the micro-display panel including a display portion, the display portion of the at least one micro-display panel corresponding to the at least one light incident surface, and light emitted by the display portion of the at least one micro-display panel entering the light-combining assembly through the at least one light incident surface and being emitted through the light emitting surface; A lens assembly corresponds to the light emitting surface, the light emitted from the light emitting surface passes through the lens assembly and is emitted to the outside, and the lens assembly is used to collimate the light emitted from the light emitting surface.

2. The micro-projection optical machine according to claim 1, wherein: Also includes: A mounting frame is provided with a mounting space, and a side surface of the mounting space has a light outlet and at least one light inlet communicated with the mounting space; the light combining component is assembled and fixed in the mounting space, the at least one light inlet surface corresponds to the at least one light inlet, and the light outlet surface corresponds to the light outlet; the display portion of the at least one micro-display panel corresponds one-to-one with the at least one light inlet of the mounting frame, and the display portion of the at least one micro-display panel is respectively fixedly connected to the side of the mounting frame having the light inlet; the lens assembly corresponds to the light outlet of the mounting frame, and the lens assembly is fixedly connected to the side of the mounting frame having the light outlet.

3. The micro-projection optical machine according to claim 2, wherein: Along the light emitting direction of the lens assembly, the thickness of the lens assembly is less than half of the width of the mounting frame.

4. The micro-projection optical machine according to claim 2, wherein: The diameter of the lens assembly is greater than half of the length of the mounting frame, and the diameter of the lens assembly is smaller than the length of the mounting frame. The length of the mounting frame is perpendicular to the light emitting direction of the lens assembly.

5. The micro-projection optical machine according to claim 2, wherein: The micro display panel further includes: a circuit board and a connector portion, one end of the circuit board is electrically connected to the display portion, and the other end of the circuit board is electrically connected to the connector portion.

6. The micro-projection optical machine according to claim 5, wherein: The at least one microdisplay panel includes: a first microdisplay panel and at least two second microdisplay panels; wherein, the connector portion of the first microdisplay panel includes at least two first connectors located on the same side; the connector portion of the second microdisplay panel includes a second connector; the second connectors of the at least two second microdisplay panels are electrically connected to the at least two first connectors of the first microdisplay panel in a one-to-one correspondence.

7. The micro-projection optical machine according to claim 6, wherein: The installation frame has a retaining side surface, and the retaining side surface is respectively perpendicular to the side surface of the installation frame having the light entrance and the side surface of the light exit.

8. The micro-projection optical machine according to claim 7, wherein: The display portion of the first micro-display panel and the display portions of the at least two second micro-display panels correspond one-to-one to the at least one light entrance of the mounting frame; the circuit boards of the at least two second micro-display surfaces are stacked and arranged alternately on the retaining side surface of the mounting frame, and the second connectors of the at least two second micro-display panels extend to the side surface of the mounting frame where the first micro-display panel is fixed, and are electrically connected one-to-one to the at least two first connectors of the first micro-display panel.

9. The micro-projection optical machine according to claim 8, wherein: The second connectors of the at least two second micro display panels are not located on the same plane.

10. The micro-projection optical machine according to claim 8, wherein: The second connectors of the at least two second micro display panels are arranged in parallel.

11. The micro-projection optical machine according to claim 6, wherein: The at least two first connectors of the first micro display panel and the at least two second connectors of the second micro display panels are arranged on a side of the display portion of the first micro display panel away from the light combining assembly.

12. The micro-projection optical machine according to claim 6, wherein: The first micro display panel further includes an external connector, and the external connector of the first micro display panel and the at least two first connectors of the first micro display panel are disposed on different and opposite surfaces of the first micro display panel.

13. The micro-projection optical machine according to claim 8, wherein: The edge of each light entrance is provided with a guide angle for guiding the installation space.

14. An electronic device, characterized in that: A micro-projection optical machine comprising any one of claims 1 to 13.

15. A micro-projection optical machine, characterized in that: include: A micro display panel having a display portion; a lens assembly, wherein the lens assembly is fixedly connected to the micro display panel, light emitted by the display portion of the micro display panel is emitted to the outside through the lens assembly, and the lens assembly is used to collimate the emitted light; The micro-projection optical machine is used for monochrome fixed-focus projection.

16. The micro-projection optical machine according to claim 15, wherein: The micro display panel further includes: a circuit board and a connector portion, one end of the circuit board is electrically connected to the display portion, and the other end of the circuit board is electrically connected to the connector portion.

17. The micro-projection optical machine according to claim 16, wherein: The display portion includes a display chip and a first reinforcing plate, and the display chip is fixedly connected to the first reinforcing plate.

18. The micro-projection optical machine according to claim 16, wherein: The connector portion includes: a connector and a second reinforcement plate, and the connector is fixedly connected to the second reinforcement plate.

19. The micro-projection optical machine according to claim 18, wherein: The micro display panel further includes a shielding cover, wherein the shielding cover and the connector are respectively arranged on different and opposite surfaces of the second reinforcing plate.

20. An electronic device, characterized in that: A micro-projection optical machine comprising any one of claims 15 to 18.

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