Prism adjusting structure

Abstract

The utility model belongs to the technical field of liquid crystal display, and particularly relates to a prism adjusting structure, which comprises a main body and a prism adjusting structure, the light path assembly is installed in the main body and used for adjusting the path direction and the polarization state of the incident light; the light path assembly comprises a prism assembly; the adjusting assembly is mounted at the top of the prism assembly; the adjusting assembly comprises a prism support adjusting column, the prism support adjusting column drives the prism assembly to move in the second direction by moving the prism support adjusting column, and the prism support adjusting column drives the prism assembly to rotate in the first direction by rotating the prism support adjusting column. By moving the prism support adjusting column, the prism support adjusting column drives the prism assembly to move in the first direction, and by rotating the prism support adjusting column, the prism support adjusting column drives the prism assembly to rotate in the second direction, so that the position of a light spot emitted by the light path assembly and the polarization state of light are convenient to adjust; and thus, the projection contrast and the image display effect are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of liquid crystal display, and in particular relates to a prism adjustment structure. Background Art

[0002] TIR-LCOS optical path design is a key part of projection display technology, which relies on precise optical component layout and optical path design to achieve high-quality image projection. However, in practical applications, due to the accumulated dimensional errors of factors such as structure, lenses, and assembly in the optical path system, the position and polarization state of the light entering the LCos chip often deviate, even beyond the range required by the theoretical design. This deviation will directly affect the clarity, color accuracy, and contrast of the final image, thereby affecting the user experience.

[0003] In order to solve these imaging problems caused by dimensional errors, complex adjustment and correction mechanisms are usually introduced. However, these mechanisms not only increase the overall module size, but also increase the difficulty and complexity of installation and debugging. Utility Model Content

[0004] The utility model provides a prism adjustment structure, which drives a prism assembly to move along a first direction by moving a prism support adjustment column, and drives the prism assembly to rotate around a second direction by rotating the prism support adjustment column, so as to adjust the position of a light spot emitted by an optical path component and the polarization state of light, thereby improving the projection contrast and image display effect; at the same time, the optical path component and the adjustment component are both arranged on a main body, so that the device structure is compact, which is convenient for realizing miniaturization of the device and can also save costs.

[0005] A prism adjustment structure, comprising:

[0006] The main body is a hollow frame structure;

[0007] An optical path component, which is installed in the main body and is used to adjust the path direction and polarization state of the incident light; the optical path component includes a prism component;

[0008] An adjustment component is installed on the top of the prism component; the adjustment component includes a prism bracket adjustment column, which is moved so that the prism bracket adjustment column drives the prism component to move along the second direction, and is rotated so that the prism bracket adjustment column drives the prism component to rotate around the first direction.

[0009] By moving the prism bracket adjustment column, the prism bracket adjustment column drives the prism assembly to move along the second direction, and by rotating the prism bracket adjustment column, the prism bracket adjustment column drives the prism assembly to rotate around the first direction, so as to adjust the position of the light spot emitted by the optical path component and the polarization state of the light, thereby improving the projection contrast and image display effect; at the same time, the optical path component and the adjustment component are both arranged on the main body, so that the device structure is compact, which is convenient for miniaturization of the device and can also save costs.

[0010] Further, the optical path component includes a relay lens, a first polarizer, a prism assembly, a lens group, an LCos chip, a second polarizer, and a lens; the lens, the second polarizer, the prism assembly, the lens group, and the LCos chip are arranged in sequence along a second direction; the relay lens, the first polarizer, and the prism assembly are arranged in sequence along a third direction; the second direction is perpendicular to the third direction;

[0011] The relay lens is used to uniformly transmit the light incident from the light source to the first polarizer; the first polarizer is used to change the polarization state of the incident light; the prism assembly is used to reflect the light whose polarization state is changed by the first polarizer to the Lens group, and transmit the light transmitted by the Lens group to the second polarizer; the Lens group is used to transmit the light reflected by the prism assembly to the LCos chip, and transmit the light reflected by the LCos chip to the prism assembly; the LCos chip is used to receive the light transmitted by the Lens group, and reflect it back to the Lens group after processing; the second polarizer is used to change the polarization state of the light transmitted by the prism assembly; the lens is used to receive the light whose polarization state is changed by the second polarizer.

[0012] By arranging the first polarizer and the second polarizer in the optical path component, it is convenient to change the polarization state of the incident light; by arranging the prism component, it is convenient to change the path of the incident light.

[0013] Furthermore, the main body is provided with:

[0014] A first circular hole, which is provided at the bottom of the main body and is used for light incidence;

[0015] A second circular hole is provided on the right side wall of the main body and is used for fitting the lens;

[0016] A hole group is provided on the left side wall of the main body; the hole group includes a third circular hole and a first square hole, the third circular hole is arranged near the inside of the main body for embedding the Lens group; the first square hole is arranged near the outside of the main body for embedding the LCos chip;

[0017] A through groove, which is arranged at the top of the main body and is arranged along a fourth direction;

[0018] A second square hole is provided on the top of the main body and is located in the through slot, and is used to adjust the movement or rotation of the adjustment component;

[0019] The screw holes include a plurality of screw holes; four of the screw holes are respectively opened at the four corners of the through slot.

[0020] A first circular hole is provided on the main body to facilitate the incident light; a second circular hole is provided to facilitate the embedding of the lens; a hole group is provided to facilitate the embedding of the Lens group and the LCos chip; a second square hole is provided to facilitate the adjustment of the prism adjustment column; and a screw hole is provided to facilitate the connection between the cover plate and the main body.

[0021] Furthermore, the prism assembly comprises:

[0022] The beam splitter prism comprises a first prism and a second prism; a side end of the first prism is attached to the second polarizer; a bottom end of the second prism is attached to the first polarizer;

[0023] A prism bracket, which is mounted on the top of the beam splitter prism; the prism bracket has a convex edge, and the convex edge is arranged toward the beam splitter prism, and is used to engage the beam splitter prism; a groove is provided on the top of the prism bracket;

[0024] The prism supporting columns include a plurality of prism supporting columns; four of the prism supporting columns are respectively arranged at the four corners of the bottom inner side of the main body, and are used to support the beam splitting prism in the third direction.

[0025] Furthermore, the prism support adjustment column is in the form of a cylinder; the prism support adjustment column is arranged at the center of the groove of the prism support and is integrated with the prism support.

[0026] Furthermore, a prism bracket adjustment groove is provided on the top of the prism bracket adjustment column.

[0027] By providing an adjustment slot for the prism bracket, manual adjustment is facilitated.

[0028] Further, it also includes a cover plate;

[0029] The thickness of the cover plate is the same as the depth of the through slot, and is used to be embedded in the through slot;

[0030] A waist-shaped hole is provided in the center of the cover plate, and the radius of the long axis of the waist-shaped hole is greater than the radius of the bottom surface of the prism bracket adjusting column;

[0031] The cover plate is sleeved on the prism support adjustment column through the waist-shaped hole, and a cover plate guide groove is formed between the cover plate and the prism support adjustment column, so that the prism support adjustment column moves or rotates in the cover plate guide groove along the second direction.

[0032] By setting a cover plate with the same depth as the through groove and cooperating with the prism bracket adjustment column through a waist-shaped hole, the cover plate can be flush with the top of the main body, and the prism bracket adjustment column can be rotated or moved in the waist-shaped hole of the cover plate, thereby facilitating the adjustment and change of the polarization state and path direction of the incident light.

[0033] Furthermore, an elastic member is provided between the cover plate and the groove of the prism bracket, so as to ensure that the beam splitter prism is always in contact with the prism supporting column.

[0034] By providing the elastic member, the beam splitter prism is always in contact with the prism supporting column, thereby ensuring that the prism assembly does not move in the third direction.

[0035] Furthermore, the cover plate and the main body are connected by screws; the bottom end of the screw extends into the screw hole, and the top end of the screw engages with the cover plate and the top end of the main body.

[0036] The arrangement facilitates the connection between the main body and the cover.

[0037] Furthermore, glue is provided in the guide groove of the cover plate for gluing the prism support adjustment column and the cover plate.

[0038] By arranging glue in the guide groove of the cover plate, it is convenient to fix the device structure after the adjustment and fixation are completed.

[0039] The beneficial effects of the utility model are:

[0040] The utility model moves the prism support adjustment column so that the prism support adjustment column drives the prism assembly to move along the second direction, and rotates the prism support adjustment column so that the prism support adjustment column drives the prism assembly to rotate around the first direction, so as to adjust the position of the light spot emitted by the optical path component and the polarization state of the light, thereby improving the projection contrast and image display effect; at the same time, the optical path component and the adjustment component are both arranged on the main body, so that the device structure is compact, which is convenient for miniaturization of the device and can also save costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic diagram of the structure of the utility model;

[0042] Figure 2 It is a schematic diagram of the top view structure of the utility model;

[0043] Figure 3This is a schematic diagram of the structure of the utility model when viewed from above;

[0044] Figure 4 for Figure 3 Middle AA section view;

[0045] Figure 5 It is a schematic diagram of the structure of the main body and the prism bearing column;

[0046] Figure 6 It is a schematic diagram of the structure of the prism assembly and the adjustment assembly.

[0047] Reference numerals:

[0048] 1. Main body; 11. First circular hole; 12. Second circular hole; 131. Third circular hole; 132. First square hole; 14. Through slot; 15. Second square hole; 16. Screw hole;

[0049] 21. Relay lens; 22. First polarizer; 2311. First prism; 2312. Second prism; 232. Prism bracket; 2321. Groove; 233. Prism supporting column; 24. LCos chip; 25. Second polarizer; 26. Lens; 27. Lens group;

[0050] 31. prism bracket adjustment column; 311. prism bracket adjustment slot;

[0051] 4. Cover plate; 41. Waist-shaped hole; 42. Cover plate guide groove;

[0052] 5. Elastic parts;

[0053] 6. Screws. DETAILED DESCRIPTION

[0054] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0055] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0056] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0057] Figures 1 to 4 What is shown is a prism adjustment structure, including a main body 1, an optical path component and an adjustment component. By moving the prism bracket adjustment column 31, the prism bracket adjustment column 31 drives the prism component to move along the second direction, and by rotating the prism bracket adjustment column 31, the prism bracket adjustment column 31 drives the prism component to rotate around the first direction, so as to adjust the position of the light spot emitted by the optical path component and the polarization state of the light, thereby improving the projection contrast and image display effect; at the same time, the optical path component and the adjustment component are both arranged on the main body 1, so that the device structure is compact, it is easy to realize the miniaturization of the device, and it can also save costs.

[0058] Specifically, if Figure 5 As shown, the main body 1 is a hollow frame structure. The main body 1 is provided with:

[0059] A first circular hole 11 is provided at the bottom of the main body 1 for light to enter;

[0060] A second circular hole 12 is provided on the right side wall of the main body 1 and is used for fitting a lens 26;

[0061] A hole group is provided on the left side wall of the main body 1; the hole group includes a third circular hole 131 and a first square hole 132, the third circular hole 131 is arranged near the inside of the main body 1 for engaging the Lens group 27; the first square hole 132 is arranged near the outside of the main body 1 for engaging the LCos chip 24;

[0062] A through slot 14, which is provided at the top of the main body 1 and is provided along a fourth direction;

[0063] A second square hole 15 is provided on the top of the main body 1 and is located in the through slot 14, and is used to adjust the movement or rotation of the adjustment component;

[0064] There are multiple screw holes 16 ; four screw holes 16 are respectively opened at the four corners of the through slot 14 , and are used to cooperate with the screws 6 to connect the cover plate 4 and the main body 1 .

[0065] Specifically, the optical path component includes a relay lens 21, a first polarizer 22, a prism assembly, a lens group 27, an LCos chip 24, a second polarizer 25, and a lens 26; the lens 26, the second polarizer 25, the prism assembly, the lens group 27, and the LCos chip 24 are arranged in sequence along the second direction; the relay lens 21, the first polarizer 22, and the prism assembly are arranged in sequence along the third direction; the second direction is perpendicular to the third direction.

[0066] The relay lens 21 is used to evenly transmit the light incident from the light source to the first polarizer 22;

[0067] Wherein, the first polarizer 22 is used to change the polarization state of the incident light;

[0068] The prism assembly is used to reflect the light whose polarization state is changed by the first polarizer 22 to the lens group 27, and transmit the light transmitted by the lens group 27 to the second polarizer 25; the prism assembly includes:

[0069] The beam splitter prism includes a first prism 2311 and a second prism 2312; the side end of the first prism 2311 is attached to the second polarizer 25; the bottom end of the second prism 2312 is attached to the first polarizer 22;

[0070] A prism bracket 232 is mounted on the top of the beam splitter prism. The prism bracket 232 has a convex edge, and the convex edge is arranged toward the beam splitter prism, and is used to engage the beam splitter prism. A groove 2321 is provided on the top of the prism bracket 232.

[0071] The prism supporting columns 233 include a plurality of prism supporting columns 233 ; four prism supporting columns 233 are respectively disposed at the four corners of the inner bottom of the main body 1 , and are used to support the beam splitting prism in the third direction.

[0072] The lens assembly 27 is used to transmit the light reflected by the prism assembly to the LCos chip 24, and transmit the light reflected by the LCos chip 24 to the prism assembly;

[0073] The LCos chip 24 is used to receive the light transmitted by the lens group 27 and reflect it back to the lens group 27 after processing;

[0074] Wherein, the second polarizer 25 is used to change the polarization state of the light transmitted through the prism assembly;

[0075] The lens 26 is used to receive the light whose polarization state is changed by the second polarizer 25 .

[0076] In this embodiment, the reflective surface of the first prism 2311 is arranged to face the effective surface of the LCos chip 24 .

[0077] Specifically, if Figure 6 As shown, an adjustment component is installed on the top of the prism component; the adjustment component includes a prism bracket adjustment column 31; the prism bracket adjustment column 31 is fixed at the center of the groove 2321 of the prism bracket 232, and is integrated with the prism bracket 232; the prism bracket adjustment column 31 is a cylinder, and a prism bracket adjustment slot 311 is provided on the top; by moving the prism bracket adjustment column 31, the prism bracket adjustment column 31 drives the prism assembly to move along the second direction, and by rotating the prism bracket adjustment column 31, the prism bracket adjustment column 31 drives the prism assembly to rotate around the first direction; at the same time, by setting the prism bracket adjustment slot 311, manual adjustment is facilitated.

[0078] Specifically, the cover plate 4 has a thickness the same as the depth of the through slot 14, and is used to fit the cover plate 4 into the through slot 14 so as to be flush with the top of the main body 1. A waist-shaped hole 41 is provided in the center of the cover plate 4, and the radius of the waist-shaped hole 41 is greater than the radius of the bottom surface of the prism support adjustment column 31; the cover plate 4 is sleeved on the prism support adjustment column 31, and a cover plate guide groove 42 is formed between the cover plate 4 and the prism support adjustment column 31, so that the prism support adjustment column 31 moves in the second direction or rotates in the first direction in the cover plate guide groove 42; by providing the cover plate 4 that cooperates with the prism support adjustment column 31, the prism support adjustment column 31 can move or rotate in the waist-shaped hole 41 of the cover plate 4, thereby facilitating the adjustment of the polarization state and path direction of the incident light.

[0079] In this embodiment, the elastic member 5 is arranged between the cover plate 4 and the groove 2321 of the prism bracket 232. A hole is opened in the middle of the elastic member 5, and the elastic member 5 is connected to the prism bracket adjustment column 31 through the hole, so that the splitter prism is always in contact with the prism supporting column 233, thereby ensuring that the prism assembly does not move in the third direction.

[0080] In this embodiment, the cover plate 4 is connected to the main body 1 via screws 6 ; the bottom end of the screw 6 extends into the screw hole 16 , and the top end engages the cover plate 4 and the top end of the main body 1 to fix the cover plate 4 .

[0081] In this embodiment, glue is provided in the cover plate guide groove 42 for gluing the prism support adjustment column 31 and the cover plate 4 together. By providing glue in the cover plate guide groove 42, it is convenient to fix the device structure after adjustment and fixation are completed.

[0082] In this embodiment, a spatial rectangular XYZ coordinate system is constructed. The first direction refers to the W direction of rotation about the axis where the axis of the prism support adjustment column 31 is located in the spatial rectangular XYZ coordinate system; the second direction refers to the Z axis direction in the spatial rectangular XYZ coordinate system; the third direction refers to the Y axis direction in the spatial rectangular XYZ coordinate system; and the fourth direction refers to the X axis direction in the spatial rectangular XYZ coordinate system.

[0083] The principle of the new optical path used in this paper is:

[0084] like Figure 4 As shown, the light source emits light, which passes through the relay lens 21, and then changes the polarization state through the first polarizer 22 before entering the dichroic prism, and then is reflected at 45° by the reflection surface of the first prism 2311, and is transmitted to the LCos chip 24 through the Lens group 27, and then is reflected by the LCos chip 24, and then is transmitted in the reverse direction of the Z axis through the Lens group 27, the dichroic prism, and the second polarizer 25 changes the polarization state of the light before entering the lens 26.

[0085] The working method of the utility model is:

[0086] The prism support adjusting column 31 is moved along the Z axis to drive the prism assembly to move along the Z axis, so that the emitted polarized light spot moves along the Y axis. Specifically, when the prism support adjusting column 31 drives the prism assembly to move along the Z+ direction, the emitted light spot moves along the Y- direction; when the prism support adjusting column 31 drives the prism assembly to move along the Z- direction, the emitted light spot moves along the Y+ direction.

[0087] The prism support adjustment column 31 is rotated around the rotation axis to drive the prism assembly to rotate around the rotation axis, so that the emitted polarized light spot moves along the X axis in the XY plane. Specifically, when the prism support adjustment column 31 drives the prism assembly to rotate along the W+ direction, the emitted light spot moves along the X+ direction, and the polarization direction of the light is adjusted in the clockwise direction in the XY plane; when the prism support adjustment column 31 drives the prism assembly to rotate along the W- direction, the emitted light spot moves along the X- direction, and the polarization direction of the light is adjusted in the counterclockwise direction in the XY plane.

[0088] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A prism adjustment structure, characterized in that: include: The main body is a hollow frame structure; An optical path component, which is installed in the main body and is used to adjust the path direction and polarization state of the incident light; the optical path component includes a prism component; An adjustment component is installed on the top of the prism component; the adjustment component includes a prism bracket adjustment column, which is moved so that the prism bracket adjustment column drives the prism component to move along the second direction, and is rotated so that the prism bracket adjustment column drives the prism component to rotate around the first direction.

2. A prism adjustment structure according to claim 1, characterized in that: The optical path component includes a relay lens, a first polarizer, a prism assembly, a lens group, an LCos chip, a second polarizer, and a lens; the lens, the second polarizer, the prism assembly, the lens group, and the LCos chip are arranged in sequence along a second direction; the relay lens, the first polarizer, and the prism assembly are arranged in sequence along a third direction; the second direction is perpendicular to the third direction; The relay lens is used to uniformly transmit the light incident from the light source to the first polarizer; the first polarizer is used to change the polarization state of the incident light; the prism assembly is used to reflect the light whose polarization state is changed by the first polarizer to the Lens group, and transmit the light transmitted by the Lens group to the second polarizer; the Lens group is used to transmit the light reflected by the prism assembly to the LCos chip, and transmit the light reflected by the LCos chip to the prism assembly; the LCos chip is used to receive the light transmitted by the Lens group, and reflect it back to the Lens group after processing; the second polarizer is used to change the polarization state of the light transmitted by the prism assembly; the lens is used to receive the light whose polarization state is changed by the second polarizer.

3. A prism adjustment structure according to claim 2, characterized in that: The main body is provided with: A first circular hole, which is provided at the bottom of the main body and is used for light incidence; A second circular hole is provided on the right side wall of the main body and is used for fitting the lens; A hole group is provided on the left side wall of the main body; the hole group includes a third circular hole and a first square hole, the third circular hole is arranged near the inside of the main body for embedding the Lens group; the first square hole is arranged near the outside of the main body for embedding the LCos chip; A through groove, which is arranged at the top of the main body and is arranged along a fourth direction; A second square hole is provided on the top of the main body and is located in the through slot, and is used to adjust the movement or rotation of the adjustment component; The screw holes include a plurality of screw holes; four of the screw holes are respectively opened at the four corners of the through slot.

4. A prism adjustment structure according to claim 3, characterized in that: The prism assembly comprises: The beam splitter prism comprises a first prism and a second prism; a side end of the first prism is attached to the second polarizer; a bottom end of the second prism is attached to the first polarizer; A prism bracket, which is mounted on the top of the beam splitter prism; the prism bracket has a convex edge, and the convex edge is arranged toward the beam splitter prism, and is used to engage the beam splitter prism; a groove is provided on the top of the prism bracket; The prism supporting columns include a plurality of prism supporting columns; four of the prism supporting columns are respectively arranged at the four corners of the bottom inner side of the main body, and are used to support the beam splitting prism in the third direction.

5. A prism adjustment structure according to claim 4, characterized in that: The prism support adjusting column is in the form of a cylinder; the prism support adjusting column is arranged at the center of the groove of the prism support and is integrated with the prism support.

6. The prism adjustment structure according to claim 1, characterized in that: A prism bracket adjustment slot is arranged on the top of the prism bracket adjustment column.

7. The prism adjustment structure according to claim 4, characterized in that: Also includes a cover plate; The thickness of the cover plate is the same as the depth of the through slot, and is used to be embedded in the through slot; A waist-shaped hole is provided in the center of the cover plate, and the radius of the long axis of the waist-shaped hole is greater than the radius of the bottom surface of the prism bracket adjusting column; The cover plate is sleeved on the prism support adjustment column through the waist-shaped hole, and a cover plate guide groove is formed between the cover plate and the prism support adjustment column, so that the prism support adjustment column moves or rotates in the cover plate guide groove along the second direction.

8. The prism adjustment structure according to claim 7, characterized in that: An elastic member is arranged between the cover plate and the groove of the prism bracket, so as to ensure that the beam splitter prism is always in contact with the prism supporting column.

9. The prism adjustment structure according to claim 7, characterized in that: The cover plate and the main body are connected by screws; the bottom end of the screw extends into the screw hole, and the top end of the screw clamps the cover plate and the top end of the main body.

10. The prism adjustment structure according to claim 7, characterized in that: Glue is arranged in the guide groove of the cover plate for gluing the prism support adjustment column and the cover plate.

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