Dodging module and projection device

Abstract

A light uniformizing module comprises a light uniformizing column, a sleeve and an end fixing piece. The light uniformizing column is provided with a light-in end and a light-out end which are opposite. The light-in end has a light-in surface. The light-emitting end has a light-emitting surface, and the area of the light-incident surface is smaller than that of the light-emitting surface. The sleeve is provided with an opening end and a stopping end which are opposite. The sleeve sleeves the light uniformizing column and is used for accommodating the light uniformizing column. The light emitting end of the light uniformizing column faces the blocking end. The end fixing piece is arranged at the open end of the sleeve and used for fixing the relative position of the light uniformizing column and the sleeve. The end fixing piece is provided with a frame body to form a clamping opening, and the light inlet end of the light uniformizing column penetrates through the clamping opening and extends out of the sleeve from the open end of the sleeve. The dodging module has the advantage of being easy to assemble, and the assembly yield and the assembly firmness are both considered. The utility model also provides a projection device comprising the dodging module.

Description

Technical Field

[0001] The utility model relates to an optical module, in particular to a light homogenizing module, and a projection device having the above light homogenizing module. Background Art

[0002] The types of light sources used in projection devices have evolved from ultra-high pressure mercury lamps (UHP lamps), light emitting diodes (LEDs) to laser diodes (LDs) according to market requirements for the brightness, color saturation, service life, non-toxic environmental protection, etc. of projection devices. In addition, a projection device is also configured with a light homogenizing module to homogenize the light beam generated by the light source module and transmit the homogenized light beam to subsequent optical elements.

[0003] Generally speaking, the light homogenizing module is configured with a light homogenizing rod and a mechanism member, and the light homogenizing rod is fixed in the projection device through the mechanism member. However, in order to firmly fix the light homogenizing rod, the existing mechanism member needs to tightly press against the light homogenizing rod, resulting in an excessive interference amount of the mechanism member on the light homogenizing rod. In this way, not only is it difficult to assemble the light homogenizing module, but also the light homogenizing rod is easily scratched by the mechanism member. On the contrary, if the interference amount of the mechanism member on the light homogenizing rod is reduced, the light homogenizing rod is likely to become loose.

[0004] The "Background Art" paragraph is only used to help understand the content of the present utility model. Therefore, the content disclosed in the "Background Art" paragraph may include some prior arts that are not known to those skilled in the art of the relevant technical field. The content disclosed in the "Background Art" paragraph does not represent that the content or the problems to be solved by one or more embodiments of the present utility model have been known or recognized by those skilled in the art before the application of the present utility model. Summary of the Utility Model

[0005] The present utility model provides a light homogenizing module, which has the advantages of being easy to assemble, and takes into account the assembly yield and assembly firmness.

[0006] The present utility model provides a projection device, which can improve the image quality and takes into account the product yield and product durability.

[0007] Other objects and advantages of the present utility model can be further understood from the technical features disclosed in the present utility model.

[0008] To achieve one or part or all of the above purposes or other purposes, a light homogenizing module according to an embodiment of the present invention includes a light homogenizing column, a sleeve, and an end fixing member. The light homogenizing column has an incident light end and an emergent light end that are opposite to each other. The incident light end has an incident light surface. The emergent light end has an emergent light surface, and the area of the incident light surface is smaller than the area of the emergent light surface. The sleeve has an open end and a stop end that are opposite to each other. The sleeve is sleeved outside the light homogenizing column, and the sleeve is used to accommodate the light homogenizing column. The emergent light end of the light homogenizing column faces the stop end. The end fixing member is disposed at the open end of the sleeve, and the end fixing member is used to fix the relative positions of the light homogenizing column and the sleeve. The end fixing member has a frame body to form a clamping port, and the incident light end of the light homogenizing column passes through the clamping port and extends out of the sleeve from the open end of the sleeve.

[0009] To achieve one or part or all of the above purposes or other purposes, a projection device according to an embodiment of the present invention includes a light source module, the above-mentioned light homogenizing module, a light valve, and a projection lens. The light source module is adapted to provide an illumination beam. The light homogenizing module is disposed on the transmission path of the illumination beam. The light homogenizing column is used to receive the illumination beam, and the illumination beam enters the light homogenizing column from the incident light surface. The illumination beam is totally reflected and transmitted inside the light homogenizing column to the emergent light surface, and leaves the light homogenizing column from the emergent light surface. The light valve is disposed on the transmission path of the illumination beam and is adapted to convert the illumination beam emitted from the light homogenizing module into an image beam. The projection lens is disposed on the transmission path of the image beam and is adapted to project the image beam.

[0010] The light homogenizing module of the present invention fixes one side of the light homogenizing column near the emergent light end by using a sleeve, and fixes the light homogenizing column on one side near the incident light end by using an end fixing member. In this way, the sleeve can omit the structure that interferes with the light homogenizing column near the open end, so that the thicker side of the light homogenizing column (i.e., the side near the emergent light end) will not be damaged by excessive interference from the structure when extending into the sleeve from the open end. In addition, the end fixing member uses the clamping port of the frame body to interfere with the thinner side of the light homogenizing column (i.e., the side near the incident light end). Therefore, when the end fixing member is sleeved on the light homogenizing column from the incident light end, the frame body will not contact the light homogenizing column before interfering with the light homogenizing column, and the frame body can achieve the effect of fixing the light homogenizing column with a small amount of interference, thereby reducing the damage of the end fixing member to the light homogenizing column. In addition, since both the end fixing member and the sleeve have the function of fixing the light homogenizing column, the interference amount of the sleeve on the light homogenizing column can be further reduced, and in this case, the light homogenizing column, the sleeve, and the end fixing member can still be firmly fixed to each other. Based on the above structure, the light homogenizing module of the present invention has the advantage of being easy to assemble, and can also take into account the assembly yield and the assembly firmness. The projection device of the present invention uses the above-mentioned light homogenizing module, so it can improve the image quality, and can also take into account the product yield and the product durability.

[0011] To make the above and other purposes, features, and advantages of the present invention more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, makes the following detailed description. Description of the Drawings

[0012] Figure 1 is a schematic diagram of a light homogenizing module according to an embodiment of the present utility model.

[0013] Figure 2 is Figure 1 exploded schematic diagram of the light homogenizing module.

[0014] Figure 3 is Figure 1 cross-sectional schematic diagram of the light homogenizing module along the K1-K1 section line.

[0015] Figure 4 is Figure 1 cross-sectional schematic diagram of the light homogenizing module along the K2-K2 section line.

[0016] Figure 5 is a cross-sectional schematic diagram of a light homogenizing module according to another embodiment of the present utility model.

[0017] Figure 6 is Figure 5 schematic diagram of the end fixing member.

[0018] Figure 7 is a cross-sectional schematic diagram of a light homogenizing module according to another embodiment of the present utility model.

[0019] Figure 8 is Figure 7 cross-sectional schematic diagram of the light homogenizing module along the K3-K3 section line.

[0020] Figure 9 is a block schematic diagram of a projection device according to an embodiment of the present utility model.

[0021] Figure 10 is a schematic diagram of a projection device according to another embodiment of the present utility model. Detailed Description of the Embodiment

[0022] Regarding the foregoing and other technical contents, features and effects of the present utility model, they will be clearly presented in the following detailed description of a preferred embodiment with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as: up, down, left, right, front or back, etc., are only with reference to the directions in the accompanying drawings. Therefore, the directional terms used are for illustration and not for limiting the present utility model.

[0023] Figure 1 is a schematic diagram of a light homogenizing module according to an embodiment of the present utility model. Figure 2 is Figure 1 exploded schematic diagram of the light homogenizing module. Figure 3 is Figure 1 cross-sectional schematic diagram of the light homogenizing module along the K1-K1 section line. Figure 4 is Figure 1Schematic cross-sectional view of the light homogenization module along the K2-K2 section line. Please refer to Figure 1 and Figure 2 , the light homogenization module 100 includes a light homogenizing column 110, a sleeve 120, and an end fixing member 130. The light homogenizing column 110 has an incident light end 111 and an outgoing light end 112 (shown in Figure 2 ). The incident light end 111 has an incident light surface IS. The outgoing light end 112 has an outgoing light surface ES (shown in Figure 2 ), and the area of the incident light surface IS is smaller than the area of the outgoing light surface ES. The sleeve 120 has an opposite open end 121 and a stop end 122. The sleeve 120 is sleeved outside the light homogenizing column 110, and the sleeve 120 is used to accommodate the light homogenizing column 110. The outgoing light end 112 of the light homogenizing column 110 faces the stop end 122. The end fixing member 130 is disposed at the open end 121 of the sleeve 120, and the end fixing member 130 is used to fix the relative positions of the light homogenizing column 110 and the sleeve 120. The end fixing member 130 has a frame body 131 to form a clamping opening F, and the incident light end 111 of the light homogenizing column 110 passes through the clamping opening F and extends out of the sleeve 120 from the open end 121 of the sleeve 120.

[0024] The light homogenizing column 110 can be used to receive the illumination beam. Specifically, the illumination beam can enter the light homogenizing column 110 from the incident light surface IS of the incident light end 111, and is transmitted to the outgoing light end 112 by total reflection in the light homogenizing column 110, and then leaves the light homogenizing column 110 from the outgoing light surface ES. In detail, the light homogenizing column 110 of this embodiment can be tubular. Therefore, the illumination beam can be transmitted in the light guiding space G of the light homogenizing column 110. The cross-sectional area of the light homogenizing column 110 perpendicular to the optical axis L (shown in Figure 2 ) gradually increases from the incident light end 111 to the outgoing light end 112. For example, the light homogenizing column 110 of this embodiment can be a tapered rod 110. It should be noted that since most of the illumination beam is transmitted in the light guiding space G of the light homogenizing column 110, the aforementioned cross-sectional area can be the cross-sectional area perpendicular to the optical axis L in the light guiding space G.

[0025] The sleeve 120 can be provided with a structure for interfering with the light homogenizing column 110, so that the side of the light homogenizing column 110 close to the outgoing light end 112 is fixed inside the sleeve 120. For example, the sleeve 120 also has a side wall 123. The side wall 123 is located between the open end 121 and the stop end 122 and surrounds the light homogenizing column 110. The side wall 123 has adjacent wall portions 1231 and 1232. The wall portion 1231 has a connected wall body W1 and a pressing piece P1, and the wall portion 1232 has a connected wall body W2 and a pressing piece P2, and the pressing pieces P1 and P2 are respectively adapted to press against the outer surface OS of the light homogenizing column 110 close to the outgoing light end 112 (shown in Figure 2In this way, the pressing pieces P1 and P2 can fix the light-homogenizing column 110 in two different directions. In detail, the side wall 123 can also have wall portions 1233 and 1234 (both marked Figure 2 ), the pressing piece P1, for example, pushes the light-homogenizing column 110 against the wall 1233 in the positive direction X to prevent the light-homogenizing column 110 from moving in the direction X. Similarly, the pressing piece P2 can push the light-homogenizing column 110 against the wall 1234 in the negative direction Y to prevent the light-homogenizing column 110 from moving in the direction Y. The walls 1231 and 1232 are, for example, substantially vertical, but the present invention is not limited thereto.

[0026] Incidentally, the wall body W1 and the pressure-resisting piece P1 of the present embodiment are, for example, integrally formed, and the wall body W2 and the pressure-resisting piece P2 can also be integrally formed. Specifically, the local wall portion 1231 can be cut and bent to form the pressure-resisting piece P1, and the unbent portion of the wall portion 1231 can form the wall body W1, and the processing method of the pressure-resisting piece P2 and the wall body W2 is roughly the same as that of the pressure-resisting piece P1 and the wall body W1. In one embodiment, the pressure-resisting piece P1 is, for example, a piece additionally connected to the wall body W1, and the pressure-resisting piece P2 can be a piece additionally connected to the wall body W2. In other words, the pressure-resisting piece P1 and the wall body W1 can be a split structure, and the pressure-resisting piece P2 and the wall body W2 can also be a split structure. For example, the pressure-resisting piece P1 can be connected to the wall body W1 by gluing or locking, and the method of connecting the pressure-resisting piece P2 to the wall body W2 is roughly the same as that of the pressure-resisting piece P1 and the wall body W1. In the present embodiment, the material of the sleeve 120 may include metal, and the metal may include stainless steel, but the present invention is not limited thereto.

[0027] In this embodiment, the end fixing member 130 can be placed between the light homogenizing column 110 and the sleeve 120 to interfere with the side of the light homogenizing column 110 close to the light input end 111. The opening area of ​​the fixing opening F is, for example, between the area of ​​the light input surface IS and the area of ​​the light output surface ES of the light homogenizing column 110, so that the light homogenizing column 110 is interfered by the frame 131 and fixed to the fixing opening F. In other words, the frame 131 can be fixed to the open end 121 of the sleeve 120, and the outer surface OS of the light homogenizing column 110 can be clamped through the fixing opening F, so that the light homogenizing column 110 is fixed to the open end 121 at the side close to the light input end 111, so that the light input end 111 of the light homogenizing column 110 extends out of the sleeve 120 from the open end 121.

[0028] Please refer to Figure 2 and Figure 3, on the other hand, the end fixing member 130 may further have two elastic pieces 132, and the two elastic pieces 132 are respectively connected to opposite sides of the frame body 131. When the end fixing member 130 is fixed to the opening end 121 of the sleeve 120, the two elastic pieces 132 are located inside the sleeve 120, and the two elastic pieces 132 respectively push against the side wall 123 in directions away from each other. In this way, the end fixing member 130 can be fixed inside the sleeve 120 through the interference of the two elastic pieces 132 with the side wall 123. Specifically, the opening end 121 of the sleeve 120 may have an opening O, and the maximum distance M (marked in Figure 2 ) between the two elastic pieces 132 may be greater than the width W of the opening O. Therefore, after the two elastic pieces 132 extend into the sleeve 120 from the opening O, they can be compressed by the wall portions 1232 and 1234 to generate a reaction force to push against the wall portions 1232 and 1234, and then be fixed inside the sleeve 120 by interfering with the side wall 123. Incidentally, the material of the end fixing member 130 may include metal, and the metal may include stainless steel for example, but the present utility model is not limited thereto.

[0029] In this embodiment, each of the two elastic pieces 132 may respectively have a pushing portion 1321 and a guiding portion 1322. The pushing portion 1321 is connected to the frame body 131, and the frame body 131 and the guiding portion 1322 are located on opposite sides of the pushing portion 1321. The guiding portion 1322 is connected to the pushing portion 1321, and the guiding portion 1322 is bent relative to the connected pushing portion 1321 toward the other guiding portion 1322. Therefore, the end fixing member 130 can more easily extend into the sleeve 120 through the guiding of the guiding portion 1322, and thus the light homogenizing module 100 can be more easily assembled. Incidentally, the included angle A (marked in Figure 3 ) between the guiding portion 1322 and the pushing portion 1321 of each of the two elastic pieces 132 is an obtuse angle for example, so as to further enhance the guiding effect provided by the guiding portion 1322 when the end fixing member 130 extends into the sleeve 120. It should be noted that the maximum distance M between the aforementioned two elastic pieces 132 is the distance between the two connection points of the two pushing portions 1321 and the corresponding connected two guiding portions 1322 for example.

[0030] Please refer to Figure 2 and Figure 4 , the end fixing member 130 may further have at least one limiting structure, and in this embodiment, one limiting structure 133 (drawn in Figure 2 ) and one limiting structure 134 are exemplified. The limiting structures 133 and 134 are connected to the frame body 131, and the limiting structure 133 is adapted to abut against the opening end 121 from the bearing surface S1 (drawn in Figure 2 ) of the opening end 121 of the sleeve 120, and the limiting structure 134 is adapted to abut against the bearing surface S2 (drawn in Figure 2)It abuts against the open end 121 to control the distance that the end fixing member 130 extends into the sleeve 120. The shapes of the limiting structures 133 and 134 can be changed to match the shape of the open end 121 of the sleeve 120. For example, the limiting structure 133 can be located between the two elastic pieces 132 and can protrude from the frame body 131 in the positive direction X to abut against the bearing surface S1. Further, the open end 121 is, for example, in a frame shape, and one end face of the frame shape can be the bearing surface S1.

[0031] In one embodiment, the open end 121 of the sleeve 120, for example, further has a convex portion C. The uniform light column 110 extends out of the opening O. The convex portion C protrudes out of the opening O in the positive direction Z away from the stopping end 122, and the bearing surface S2 is located on the convex portion C. The limiting structure 134, for example, has an extension section 1341 and a stopping section 1342. The extension section 1341 is connected to the frame body 131, and the frame body 131 and the stopping section 1342 are located on opposite sides of the extension section 1341. The stopping section 1342 is connected to the extension section 1341 and is bent relative to the extension section 1341. The stopping section 1342 is adapted to abut against the convex portion C from the bearing surface S2 of the sleeve 120. In short, the extension section 1341 can extend along the positive direction Z away from the open end 121 to match the length that the convex portion C protrudes out of the opening O, so that the stopping section 1342 can abut against the convex portion C when the end fixing member 130 extends into the sleeve 120, thereby controlling the distance that the end fixing member 130 extends into the sleeve 120. Please continue to refer to Figure 2 , in this embodiment, the limiting structures 133 and 134, for example, face each other, and the stopping section 1342 and the limiting structure 133 can protrude from the frame body 131 in opposite directions. However, in one embodiment, the end fixing member 130 can be provided with only a single limiting structure 133 or 134. In another embodiment, the number of the limiting structures 133 or 134 can be one or more than two, and the present invention does not limit this in detail.

[0032] Please refer to again Figure 1 and Figure 2, the assembly steps of the light homogenizing module 100 of this embodiment are described as follows. First, insert the light-emitting end 112 of the light homogenizing column 110 into the sleeve 120 from the opening O of the opening end 121 of the sleeve 120 until the light homogenizing column 110 is fixed in the sleeve 120 due to the interference of the two pressing pieces P1 and P2 on the side close to the light-emitting end 112. In addition, the blocking end 122 can block the light-emitting end 112 of the light homogenizing column 110 in the sleeve 120, and the light-incident end 111 of the light homogenizing column 110 extends out of the sleeve 120 from the opening O. Next, sleeved the end fixing member 130 on the light homogenizing column 110 from the light-incident end 111 of the light homogenizing column 110 until the end fixing member 130 is fixed between the light homogenizing column 110 and the sleeve 120 due to the interference of the light homogenizing column 110 and the sleeve 120. After the end fixing member 130 is fixed between the light homogenizing column 110 and the sleeve 120, the assembly of the light homogenizing module 100 is completed. Incidentally, the above assembly steps are only examples and are not intended to limit the present invention.

[0033] Compared with the prior art, the light homogenizing module 100 of this embodiment uses the sleeve 120 to fix the side of the light homogenizing column 110 close to the light-emitting end 112, and uses the end fixing member 130 to fix the light homogenizing column 110 on the side close to the light-incident end 111. In this way, the sleeve 120 can omit the structure for interfering with the light homogenizing column 110 near the opening end 121, so that the thicker side of the light homogenizing column 110 (i.e., the side close to the light-emitting end 112) will not be damaged due to excessive interference from the structure during the process of inserting the light homogenizing column 110 into the sleeve 120 from the opening end. In addition, the end fixing member 130 uses the clamping port F of the frame 131 to interfere with the thinner side of the light homogenizing column 110 (i.e., the side close to the light-incident end 111). Therefore, during the process of sleeving the end fixing member 130 on the light homogenizing column 110 from the light-incident end 111, the frame 131 will not contact the light homogenizing column 110 before interfering with the light homogenizing column 110, and the frame 131 can achieve the effect of fixing the light homogenizing column 110 with a small amount of interference, thereby reducing the damage of the end fixing member 130 to the light homogenizing column 110. In addition, since both the end fixing member 130 and the sleeve 120 have the function of fixing the light homogenizing column 110, the interference amount of the sleeve 120 on the light homogenizing column 110 can be further reduced, and in this case, the light homogenizing column 110, the sleeve 120 and the end fixing member 130 can still be firmly fixed to each other. Based on the above structure, the light homogenizing module 100 of this embodiment has the advantages of easy assembly, and can also take into account the assembly yield and assembly firmness.

[0034] Figure 5 It is a cross-sectional schematic view of a light homogenizing module according to another embodiment of the present invention. Figure 6 is Figure 5 a schematic diagram of the end fixing member. The structure and advantages of the light homogenizing module 100a of this embodiment are similar to those of Figure 1 the embodiment, and only the differences will be described below. Please refer to Figure 5 andFigure 6 Among them, the two elastic pieces 132a of the end fixing member 130a include a first elastic piece SP1 and a second elastic piece SP2. The clamping port Fa may have a communicating clamping area F1 and an extending area F2. The uniform light column 110 passes through the clamping area F1. The extending area F2 extends from the clamping area F1 to the first elastic piece SP1, and the second elastic piece SP2 has a structural strength weakening part WS corresponding to the extending area F2. Specifically, because the extending area F2 will weaken the structural strength of the first elastic piece SP1, the structural strength of the second elastic piece SP2 can be weakened through the structural strength weakening part WS to match the structural strength of the first elastic piece SP1. Among them, the structural strength weakening part WS may be an opening penetrating the second elastic piece SP2, but is not limited thereto. In other embodiments, the structural strength weakening part WS may be a plurality of holes penetrating the second elastic piece SP2, or other materials different from the second elastic piece SP2, thereby weakening the structural strength of the second elastic piece SP2. In this way, when changing the structural strengths of the first elastic piece SP1 and the second elastic piece SP2, the first elastic piece SP1 and the second elastic piece SP2 can be maintained to push against the sleeve 120 with substantially the same thrust, so that the frame 131a can clamp the uniform light column 110 with substantially the same force on the opposite sides connecting the first elastic piece SP1 and the second elastic piece SP2, thereby preventing the uniform light column 110 from tilting due to uneven thrust applied by the first elastic piece SP1 and the second elastic piece SP2 to the sleeve 120.

[0035] Please continue to refer to Figure 6 In this embodiment, for example, the extending area F2 extends from the clamping area F1 to the pushing part 1321a of the first elastic piece SP1 and may penetrate the first elastic piece SP1 along the direction Y. In addition, the structural strength weakening part WS may penetrate the pushing part 1321b and the guiding part 1322b of the second elastic piece SP2 along the direction Y and be separated from the clamping area F1. However, since the characteristics of the structural strength weakening part WS can be changed according to the characteristics of the extending area F2, the present invention does not limit this in detail. In addition, the clamping area F1 of this embodiment corresponds to the open end 121 of the sleeve 120, for example, and the light incident end 111 of the uniform light column 110 can extend out of the sleeve 120. In addition, the extending area F2 may correspond to the side wall 123 of the sleeve 120, that is, the extending area F2 can expose a partial side wall 123 after the end fixing member 130a is fixed to the sleeve 120. Incidentally, the included angle A1 between the pushing part 1321a of the first elastic piece SP1 and the clamping area F1 may be smaller than the included angle A2 between the pushing part 1321b of the second elastic piece SP2 and the frame 131a.

[0036] Figure 7 is a cross-sectional schematic view of a uniform light module according to another embodiment of the present invention. Figure 8 is Figure 7 The cross-sectional schematic view of the uniform light module along the section line K3-K3. The structure and advantages of the uniform light module 100b in this embodiment are similar to Figure 1For the embodiments below, only the differences will be described. Please refer to Figure 7 and Figure 8 , the light homogenizing module 100b further includes, for example, at least one adhesive 140, and in this embodiment, a plurality of adhesives 140 are exemplified. The side wall 123 has, for example, at least one glue-filling through hole H, and in this embodiment, a plurality of glue-filling through holes H are exemplified. The adhesive 140 is disposed in the glue-filling through hole H to connect at least two of the light homogenizing column 110, the sleeve 120, and the end fixing member 130. Thus, the adhesive 140 can strengthen the fixation of the light homogenizing column 110, the sleeve 120, and the end fixing member 130, thereby improving the assembly firmness of the light homogenizing module 100b. In this embodiment, the adhesive 140 can be disposed in the glue-filling through hole H after the assembly of the light homogenizing module 100b is completed. Further, some of the adhesives 140 can connect the light homogenizing column 110, the pressing sheets P1 and P2, and some other adhesives 140 can connect the light homogenizing column 110 and the two elastic sheets 132. In one embodiment, the adhesive 140 can connect the light homogenizing column 110, the sleeve 120, and the end fixing member 130 together. Incidentally, the adhesive 140 in this embodiment includes, for example, an ultraviolet curing adhesive, but the present invention is not limited thereto.

[0037] Figure 9 is a block diagram of a projection device according to an embodiment of the present invention. Please refer to Figure 3 and Figure 9 , the projection device 200 includes a light source module 210, a light homogenizing module 100, a light valve 220, and a projection lens 230. The light source module 210 is adapted to provide an illumination beam L1. The light homogenizing module 100 is disposed on the transmission path of the illumination beam L1. The light homogenizing module 100 can use any one of the light homogenizing modules in the foregoing embodiments, wherein the light homogenizing column 110 is used to receive the illumination beam L1, and the illumination beam L1 enters the light homogenizing column 110 from the incident light surface IS. The illumination beam L1 is totally reflected and transmitted in the light homogenizing column 110 to the exit light surface ES, and leaves the light homogenizing column 110 from the exit light surface ES. The light valve 220 is disposed on the transmission path of the illumination beam L1 and is adapted to convert the illumination beam L1 emitted from the light homogenizing module 100 into an image beam L2. The projection lens 230 is disposed on the transmission path of the image beam L2 and is adapted to project the image beam L2.

[0038] The light source module 210 may include an excitation light source. Specifically, the excitation light source includes, for example, a light emitting diode (LED) or a laser diode (LD), and the number of the light emitting diodes or laser diodes may be one or more. For example, when the number of the light emitting diodes (or laser diodes) is multiple, the light emitting diodes (or laser diodes) may be arranged in a matrix. In one embodiment, the excitation light source includes, for example, a monochromatic light source, and a wavelength conversion element may be further disposed downstream of the optical path of the excitation light source. In another embodiment, the excitation light source may include a multi-color light source.

[0039] In this embodiment, the incident light surface IS of the light homogenizing column 110 allows the illumination beam L1 to enter the light guiding space G, and is transmitted to the light exiting surface ES in the light guiding space G in a total reflection manner, and then leaves the light homogenizing column 110 from the light exiting surface ES. Specifically, the incident light surface IS and the light exiting surface ES may include openings communicating with the light guiding space G for the illumination beam L1 to pass through. It can be understood that the blocking end 122 of the sleeve 120 may be provided with an opening communicating with the light guiding space G for the illumination beam L1 to exit from the light homogenizing module 100. Other features of the light homogenizing module 100 have been described above, so the related description is omitted here.

[0040] The light valve 220 includes, for example, a digital micromirror device (DMD), a liquid crystal on silicon (LCoS), or a liquid crystal display panel (LCD), but the present invention is not limited thereto. In addition, the present invention does not limit the number of the light valves 220. For example, the projection device 200 of this embodiment may adopt a single-chip liquid crystal display panel or a three-chip liquid crystal display panel architecture, but the present invention does not limit this in detail.

[0041] The projection lens 230 of this embodiment may include one or more optical lenses, and the diopter of the optical lenses may be the same as or different from each other. For example, the optical lenses may include various non-planar lenses such as biconcave lenses, biconvex lenses, convex-concave lenses, concave-convex lenses, plano-convex lenses, and plano-concave lenses, or any combination of the above non-planar lenses. On the other hand, the projection lens 230 may also include planar optical lenses. The present invention does not limit the specific structure of the projection lens 230 in detail.

[0042] Compared with the prior art, the projection device 200 of this embodiment adopts the light homogenizing module 100, so the image quality can be improved, and the product yield and product durability can be taken into account. It can be understood that in one embodiment, the projection device 200 may also adopt the light homogenizing module 100a or 100b.

[0043] Figure 10 It is a schematic diagram of a projection device according to another embodiment of the present utility model. The structure and advantages of the projection device 200a in this embodiment are similar to those of Figure 9 the embodiment, and only the differences will be described below. Please refer to Figure 10 , for example, the projection device 200a further includes a base 240 and a fixing member 250. The light homogenizing module 100 is disposed on the base 240. The fixing member 250 is fixed to the base 240 and presses against the sleeve 120 of the light homogenizing module 100 to fix the light homogenizing module 100 on the base 240. Specifically, the fixing member 250 may have two fixing portions 251, a body portion 252, and two first pressing portions 253. The two fixing portions 251 are connected to opposite sides of the body portion 252. The two first pressing portions 253 are connected to opposite sides of the body portion 252 and are respectively located between the two fixing portions 251. The two fixing portions 251 are fixed to the base 240. The body portion 252 covers the sleeve 120 of the light homogenizing module 100, and the two first pressing portions 253 press against the sleeve 120. Further, the body portion 252 can protect the light homogenizing module 100, and the two first pressing portions 253 can prevent the light homogenizing module 100 from displacing relative to the base 240. Incidentally, the two fixing portions 251 can be attached to the base 240 via screws, but other embodiments are not limited thereto.

[0044] The sleeve 120 in this embodiment, for example, has a first pressed wall 124, and the first pressed wall 124 is located between the light homogenizing column 110 and the two first pressing portions 253 of the fixing member 250. The first pressed wall 124 may have a main body portion 1241 and a protection and strengthening portion 1242. The main body portion 1241 extends from the blocking end 122 of the sleeve 120 to the opening end 121. The protection and strengthening portion 1242 is connected to the main body portion 1241 on the side of the opening end 121, and the two first pressing portions 253 press against the main body portion 1241 and / or the protection and strengthening portion 1242. For example, in this embodiment, one of the first pressing portions 253 presses against the main body portion 1241, and the other first pressing portion 253 presses against the main body portion 1241 and the protection and strengthening portion 1242. Thus, the protection and strengthening portion 1242 can block the first pressing portion 253 at the opening end 121 of the sleeve 120, thereby preventing the first pressing portion 253 from moving from the main body portion 1241 to the light homogenizing column 110 and scratching the light homogenizing column 110. Incidentally, the protection and strengthening portion 1242 is, for example, in a plate shape, and the protection and strengthening portion 1242 can be bent away from the light homogenizing column 110 relative to the main body portion 1241 to surely block the first pressing portion 253 on the main body portion 1241. The protection and strengthening portion 1242 is not limited thereto. In another embodiment, the protection and strengthening portion 1242 can protrude from the opening end 121 of the sleeve 120 to block the first pressing portion 253 on the main body portion 1241.

[0045] On the other hand, the fixing member 250 may also have two second pressing portions 254. The main body portion 252 of the fixing member 250 has a connected first plate body 2521 and a second plate body 2522. The two first pressing portions 253 are connected to opposite sides of the first plate body 2521, and the two second pressing portions 254 are connected to opposite sides of the second plate body 2522. The sleeve 120 has a second pressure-receiving wall 125 adjacent to the first pressure-receiving wall 124. The first plate body 2521 corresponds to the first pressure-receiving wall 124, and the two first pressing portions 253 press against the first pressure-receiving wall 124. The second plate body 2522 corresponds to the second pressure-receiving wall 125, and the two second pressing portions 254 press against the second pressure-receiving wall 125. In this way, the two first pressing portions 253 and the two second pressing portions 254 can together press the light homogenizing module 100 against the base 240 to enhance the firmness of the light homogenizing module 100 fixed to the base 240. Incidentally, the second pressure-receiving wall 125 has, for example, a protection and strengthening portion 1251, and the protection and strengthening portion 1251 can protrude from the open end 121 of the sleeve 120 to prevent the second pressing portion from scratching the light homogenizing column 110. It should be noted that the protection and strengthening portion 1251 is, for example, Figure 1 the convex portion C, the first pressure-receiving wall 124 can be Figure 1 the wall portion 1232, and the second pressure-receiving wall 125 can be Figure 1 the wall portion 1231. In another embodiment, the protection and strengthening portion 1251 can also be the above-mentioned plate-shaped protection and strengthening portion 1242, and is not limited thereto.

[0046] In summary, the light homogenizing module of the present utility model fixes one side of the light homogenizing column close to the light-emitting end by a sleeve, and fixes the light homogenizing column on one side close to the light-incident end by an end fixing member. In this way, the sleeve can eliminate the structure that interferes with the light homogenizing column near the open end, so that the thicker side of the light homogenizing column (i.e., the side close to the light-emitting end) will not be damaged by excessive interference from the structure during the process of extending into the sleeve from the open end. In addition, the end fixing member uses the clamping opening of the frame to interfere with the thinner side of the light homogenizing column (i.e., the side close to the light-incident end). Therefore, during the process of sleeving the end fixing member on the light homogenizing column from the light-incident end, the frame will not contact the light homogenizing column before interfering with the light homogenizing column, and the frame can achieve the effect of fixing the light homogenizing column with a small amount of interference, thereby reducing the damage of the end fixing member to the light homogenizing column. Further, since both the end fixing member and the sleeve have the function of fixing the light homogenizing column, the interference amount of the sleeve on the light homogenizing column can be further reduced, and in this case, the light homogenizing column, the sleeve and the end fixing member can still be firmly fixed to each other. Based on the above structure, the light homogenizing module of the present utility model has the advantage of being easy to assemble, and can also take into account the assembly yield and the assembly firmness. The projection device of the present utility model uses the above light homogenizing module, so it can improve the image quality and can also take into account the product yield and the product durability.

[0047] The above are only the preferred embodiments of the present utility model, and should not be used to limit the scope of implementation of the present utility model. That is, all simple equivalent changes and modifications made according to the claims of the present utility model and the content of the utility model still fall within the scope covered by the patent of the present utility model. In addition, any embodiment or claim of the present utility model does not have to achieve all the purposes, advantages or features disclosed by the present utility model. In addition, the abstract and the title (name of the utility model) are only used to assist in the retrieval of patent documents and are not used to limit the scope of rights of the present utility model. In addition, the terms "first", "second", etc. mentioned in this specification or claims are only used to name elements or distinguish different embodiments or scopes, and are not used to limit the upper or lower limits of the number of elements.

Claims

1. A light homogenization module, characterized in that: The light homogenization module includes a light homogenization column, a sleeve and an end fixing member, wherein: The light homogenizing column has a light input end and a light output end opposite to each other, the light input end has a light input surface, the light output end has a light output surface, and the area of ​​the light input surface is smaller than the area of ​​the light output surface; The sleeve has an opening end and a stop end opposite to each other, and the sleeve is sleeved outside the light-homogenizing column to accommodate the light-homogenizing column, and the light-emitting end of the light-homogenizing column faces the stop end; and The end fixing piece is arranged at the open end of the sleeve to fix the relative position of the light-evening column and the sleeve, and the end fixing piece has a frame to form a fixing port, wherein the light incident end of the light-evening column passes through the fixing port and extends out of the sleeve from the open end of the sleeve.

2. The light homogenization module according to claim 1, characterized in that: The sleeve also has a side wall, which is located between the open end and the stop end and surrounds the uniform light column. The end fixing piece also has two spring plates, which are respectively connected to opposite sides of the frame. When the end fixing piece is fixed to the open end of the sleeve, the two spring plates are located in the sleeve and push against the side walls in directions away from each other.

3. The light homogenization module according to claim 2, characterized in that: Each of the two spring sheets has a pushing portion and a guiding portion, the pushing portion is connected to the frame, the frame and the guiding portion are located on opposite sides of the pushing portion, the guiding portion is connected to the pushing portion, and the guiding portion is bent toward the other guiding portion relative to the connected pushing portion.

4. The light homogenization module according to claim 3, characterized in that: The included angle between the guiding portion and the pushing portion of each of the two spring pieces is an obtuse angle.

5. The light homogenization module according to claim 2, characterized in that: The two spring pieces include a first spring piece and a second spring piece, the fixing opening has a connecting fixing area and an extension area, the uniform light column passes through the fixing area, the extension area extends from the fixing area to the first spring piece, and the second spring piece has a structural strength weakening portion corresponding to the extension area.

6. The light homogenization module according to claim 1, characterized in that: The end fixing piece also has at least one limiting structure, which is connected to the frame body and is suitable for abutting against the open end of the sleeve from the bearing surface of the open end.

7. The light homogenization module according to claim 6, characterized in that: The open end of the sleeve has an opening portion and a convex portion, the uniform light column extends out of the opening portion, the convex portion protrudes out of the opening portion in a direction away from the stop end, the bearing surface is located on the convex portion, and the at least one limiting structure has an extension section and a stop section, the extension section is connected to the frame body, the frame body and the stop section are located on opposite sides of the extension section, the stop section is connected to the extension section and is bent relative to the extension section, and the stop section is suitable for abutting against the convex portion from the bearing surface of the sleeve.

8. The light homogenization module according to claim 1, characterized in that: The sleeve also has a side wall, which is located between the opening end and the stop end and surrounds the light-uniform column. The side wall has two adjacent wall portions, each of which has a connected wall body and a pressure plate, and the pressure plate is suitable for pressing against the outer surface of the light-uniform column close to the light-emitting end.

9. The light homogenization module according to claim 8, characterized in that: The wall body and the pressing piece are formed integrally, or the pressing piece is a piece additionally connected to the wall body.

10. The light homogenization module according to claim 1, characterized in that: The light homogenizing module also includes at least one glue material, and the sleeve also has a side wall, which is located between the opening end and the stop end and surrounds the light homogenizing column. The side wall has at least one glue-filled through hole, and the at least one glue material is arranged in the at least one glue-filled through hole to connect the light homogenizing column, the sleeve and at least two of the end fixing members.

11. The light homogenization module according to claim 1, characterized in that: The opening area of ​​the fixing port is between the area of ​​the light incident surface and the area of ​​the light emitting surface of the light homogenizing column.

12. A projection device, characterized in that: The projection device includes a light source module, a light homogenization module, a light valve and a projection lens, wherein: The light source module is suitable for providing an illumination beam; The light homogenizing module is arranged on the transmission path of the illumination light beam, and the light homogenizing module includes a light homogenizing column, a sleeve and an end fixing piece, the light homogenizing column is used to receive the illumination light beam, the light homogenizing column has a light input end and a light output end relative to each other, the light input end has a light input surface, the light output end has a light output surface, the illumination light beam enters the light homogenizing column from the light input surface, the illumination light beam is totally reflected in the light homogenizing column and transmitted to the light output surface, and leaves the light homogenizing column from the light output surface, wherein the light input end of the light homogenizing column The area of ​​the surface is smaller than the area of ​​the light emitting surface, the sleeve has an opposite open end and a stop end, the sleeve is sleeved outside the light homogenizing column to accommodate the light homogenizing column, the light emitting end of the light homogenizing column faces the stop end, the end fixing piece is arranged at the open end of the sleeve to fix the relative position of the light homogenizing column and the sleeve, the end fixing piece has a frame to form a clamping port, the light input end of the light homogenizing column passes through the clamping port and extends out of the sleeve from the open end of the sleeve; The light valve is disposed on the transmission path of the illumination light beam and is adapted to convert the illumination light beam emitted from the light homogenization module into an image light beam; and The projection lens is arranged on the transmission path of the image light beam and is suitable for projecting the image light beam.

13. The projection device according to claim 12, characterized in that: The projection device further comprises a base and a fixing member, the light homogenizing module is arranged on the base, and the fixing member is fixed to the base and pressed against the sleeve of the light homogenizing module.

14. The projection device according to claim 13, characterized in that: The fixing member has two fixing parts, a main body and two first pressing parts, the two fixing parts are connected to the opposite sides of the main body, the two first pressing parts are connected to the opposite sides of the main body and are respectively located between the two fixing parts, the two fixing parts are fixed to the base, the main body covers the sleeve of the homogenizing module, and the two first pressing parts are pressed against the sleeve.

15. The projection device according to claim 14, characterized in that: The sleeve has a first pressure-bearing wall, which is located between the light-uniform column and the two first pressure-bearing parts of the fixing member. The first pressure-bearing wall has a main body and a protective reinforcement part. The main body extends from the stopping end of the sleeve to the opening end, the protective reinforcement part is connected to the main body and is located on one side of the opening end, and the two first pressure-bearing parts are pressed against the main body and / or the protective reinforcement part.

16. The projection device according to claim 15, characterized in that: The protection reinforcement part is in a plate shape, and the protection reinforcement part protrudes from the opening end, or is bent relative to the main body toward a direction away from the uniform light column.

17. The projection device according to claim 14, characterized in that: The fixing member also has two second pressing portions, the main body of the fixing member has a first plate body and a second plate body connected to each other, the two first pressing portions are connected to opposite sides of the first plate body, and the two second pressing portions are connected to opposite sides of the second plate body, the sleeve has a first pressure-bearing wall and a second pressure-bearing wall adjacent to each other, the first plate body corresponds to the first pressure-bearing wall, and the two first pressing portions are pressed against the first pressure-bearing wall, the second plate body corresponds to the second pressure-bearing wall, and the two second pressing portions are pressed against the second pressure-bearing wall.

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