Patent Publication Number: US-11662540-B2

Title: Imaging lens module and electronic device

Description:
RELATED APPLICATIONS 
     This application is a continuation patent application of U.S. application Ser. No. 16/853,117 filed on Apr. 20, 2020, which claims priority to Taiwan Application 109105953, filed on Feb. 25, 2020, which is incorporated by reference herein in its entirety. 
    
    
     BACKGROUND 
     Technical Field 
     The present disclosure relates to an imaging lens module and an electronic device, more particularly to an imaging lens module applicable to an electronic device. 
     Description of Related Art 
     With the development of semiconductor manufacturing technology, the performance of image sensors has been improved, and the pixel size thereof has been scaled down. Therefore, featuring high image quality becomes one of the indispensable features of an optical system nowadays. Furthermore, due to the rapid changes in technology, electronic devices equipped with optical systems are trending towards multi-functionality for various applications, and therefore the functionality requirements for the optical systems have been increasing. 
     A conventional optical lens system usually includes an injection-molded plastic lens barrel, which not only reduces manufacturing costs, but also increases shape design flexibility of the inner side surface of the lens barrel to meet various requirements. However, in the trend of miniaturization of the optical lens system, there may be a problem of a poor melt flow rate existing in the process of injection molding the plastic lens barrel. This problem causes an improper assembly, such as being offset and skew, of the optical lens system due to an overly large dimensional tolerance of the injection-molded plastic lens barrel, thereby allowing dust easy to enter the plastic lens barrel. In addition, it will waste time to classify parts to be assembled correspondingly to the different tolerance grades of the plastic lens barrel, which is not easy to be implemented in automated production line for mass production. Accordingly, how to improve the structure of the injection-molded plastic lens barrel is an important topic in the field nowadays. 
     SUMMARY 
     According to one aspect of the present disclosure, an imaging lens module includes an imaging lens assembly, an image sensor, and a plastic lens barrel. The imaging lens assembly has an optical axis. The image sensor is disposed on an image side of the imaging lens assembly, and the image sensor has an image sensing surface facing towards the imaging lens assembly. The optical axis passes through the image sensing surface. The plastic lens barrel accommodates the imaging lens assembly, and the plastic lens barrel includes an object-end portion, a bottom portion, a first inner hole portion, and a second inner hole portion. The object-end portion has an object-end surface and at least one tapered surface. The object-end surface faces towards an object side direction of the imaging lens assembly. The at least one tapered surface is tapered off towards the object-end surface. The bottom portion is located on an image side of the object-end portion. The imaging lens assembly is disposed in the first inner hole portion. The second inner hole portion is located on an image side of the first inner hole portion, and the second inner hole portion includes an optical aligning structure. A relative position between the image sensing surface and the imaging lens assembly is aligned by the optical aligning structure. The plastic lens barrel has at least three gate traces. 
     When a standard deviation of minimum distances between each of the at least three gate traces and the optical axis is dg_std, and an aperture diameter of the imaging lens module is ϕs, the following condition is satisfied:
 
0[mm]≤dg_std&lt;1.0×ϕs[mm].
 
     When a length of the second inner hole portion in a direction in parallel with the optical axis is Lr, the following condition is satisfied:
 
0.2[mm]&lt;Lr&lt;2.7[mm].
 
     According to another aspect of the present disclosure, an imaging lens module includes an imaging lens assembly, an image sensor, and a plastic lens barrel. The imaging lens assembly has an optical axis. The image sensor is disposed on an image side of the imaging lens assembly, and the image sensor has an image sensing surface facing towards the imaging lens assembly. The optical axis passes through the image sensing surface. The plastic lens barrel accommodates the imaging lens assembly, and the plastic lens barrel includes an object-end portion, a bottom portion, a first inner hole portion, and a second inner hole portion. The object-end portion has an object-end surface and at least one tapered surface. The object-end surface faces towards an object side direction of the imaging lens assembly. The at least one tapered surface is tapered off towards the object-end surface. The bottom portion is located on an image side of the object-end portion. The imaging lens assembly is disposed in the first inner hole portion. The second inner hole portion is located on an image side of the first inner hole portion, and the second inner hole portion includes an optical aligning structure. A relative position between the image sensing surface and the imaging lens assembly is aligned by the optical aligning structure. The plastic lens barrel has at least three gate traces. 
     When a standard deviation of minimum distances between each of the at least three gate traces and the optical axis is dg_std, and an aperture diameter of the imaging lens module is ϕs, the following condition is satisfied:
 
0[mm]≤dg_std&lt;1.0×ϕs[mm].
 
     When an area surrounded by the object-end surface is Af, and an area surrounded by the bottom portion is Ab, the following condition is satisfied:
 
0&lt;Af/Ab&lt;0.35.
 
     According to another aspect of the present disclosure, an electronic device includes one of the aforementioned imaging lens modules and a display module, wherein the display module is located on an object side of the imaging lens module. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The disclosure can be better understood by reading the following detailed description of the embodiments, with reference made to the accompanying drawings as follows: 
         FIG.  1    is a perspective view of a partially sectioned imaging lens module and an image sensor thereof with a circuit board and a substrate according to the 1st embodiment of the present disclosure; 
         FIG.  2    is a side view of the partially sectioned imaging lens module and the image sensor thereof with the circuit board and the substrate viewing from an AA direction in  FIG.  1   ; 
         FIG.  3    is a side view of the partially sectioned imaging lens module and the image sensor thereof with the circuit board and the substrate viewing from a BB direction in  FIG.  1   ; 
         FIG.  4    is a side view of the partially sectioned imaging lens module and the image sensor thereof with the circuit board and the substrate viewing from a CC direction in  FIG.  1   ; 
         FIG.  5    is an exploded view of the imaging lens module and the image sensor thereof with the circuit board and the substrate in  FIG.  1   ; 
         FIG.  6    is a cross-sectional view of the imaging lens module and the image sensor thereof with the circuit board and the substrate in  FIG.  5   ; 
         FIG.  7    is a cross-sectional view of a plastic lens barrel of the imaging lens module in  FIG.  6   ; 
         FIG.  8    is a perspective view of the plastic lens barrel of the imaging lens module in  FIG.  6   ; 
         FIG.  9    is a top view of the plastic lens barrel of the imaging lens module in  FIG.  6   ; 
         FIG.  10    is another perspective view of the plastic lens barrel of the imaging lens module in  FIG.  6   ; 
         FIG.  11    is a bottom view of the plastic lens barrel of the imaging lens module in  FIG.  6   ; 
         FIG.  12    is a front view of the image sensor of the imaging lens module with the circuit board and the substrate in  FIG.  5   ; 
         FIG.  13    is a partial and cross-sectional view of an electronic device and an image sensor thereof with a circuit board and a substrate according to the 2nd embodiment of the present disclosure; 
         FIG.  14    is a cross-sectional view of an imaging lens module and an image sensor thereof with a circuit board and a substrate according to the 3rd embodiment of the present disclosure; 
         FIG.  15    is a cross-sectional view of a plastic lens barrel of the imaging lens module in  FIG.  14   ; 
         FIG.  16    is a top view of the plastic lens barrel of the imaging lens module in  FIG.  14   ; 
         FIG.  17    is a bottom view of the plastic lens barrel of the imaging lens module in  FIG.  14   ; 
         FIG.  18    is a front view of the image sensor of the imaging lens module with the circuit board and the substrate in  FIG.  14   ; 
         FIG.  19    is a partial and cross-sectional view of an electronic device and an image sensor thereof with a circuit board and a substrate according to the 4th embodiment of the present disclosure; 
         FIG.  20    is a cross-sectional view of an imaging lens module and an image sensor thereof with a circuit board and a substrate according to the 5th embodiment of the present disclosure; 
         FIG.  21    is a cross-sectional view of a plastic lens barrel of the imaging lens module in  FIG.  20   ; 
         FIG.  22    is a top view of the plastic lens barrel of the imaging lens module in  FIG.  20   ; 
         FIG.  23    is a bottom view of the plastic lens barrel of the imaging lens module in  FIG.  20   ; 
         FIG.  24    is a front view of the image sensor of the imaging lens module with the circuit board and the substrate in  FIG.  20   ; 
         FIG.  25    is a partial and cross-sectional view of an electronic device and an image sensor thereof with a circuit board and a substrate according to the 6th embodiment of the present disclosure; 
         FIG.  26    is a cross-sectional view of an imaging lens module and an image sensor thereof with a circuit board and a substrate according to the 7th embodiment of the present disclosure; 
         FIG.  27    is a cross-sectional view of a plastic lens barrel of the imaging lens module in  FIG.  26   ; 
         FIG.  28    is a top view of the plastic lens barrel of the imaging lens module in  FIG.  26   ; 
         FIG.  29    is a bottom view of the plastic lens barrel of the imaging lens module in  FIG.  26   ; 
         FIG.  30    is a front view of the image sensor of the imaging lens module with the circuit board and the substrate in  FIG.  26   ; 
         FIG.  31    is a partial and cross-sectional view of an electronic device and an image sensor thereof with a circuit board and a substrate according to the 8th embodiment of the present disclosure; 
         FIG.  32    is a cross-sectional view of an imaging lens module and an image sensor thereof with a circuit board and a substrate according to the 9th embodiment of the present disclosure; 
         FIG.  33    is a cross-sectional view of a plastic lens barrel of the imaging lens module in  FIG.  32   ; 
         FIG.  34    is a top view of the plastic lens barrel of the imaging lens module in  FIG.  32   ; 
         FIG.  35    is a bottom view of the plastic lens barrel of the imaging lens module in  FIG.  32   ; 
         FIG.  36    is a front view of the image sensor of the imaging lens module with the circuit board and the substrate in  FIG.  32   ; 
         FIG.  37    is a partial and cross-sectional view of an electronic device and an image sensor thereof with a circuit board and a substrate according to the 10th embodiment of the present disclosure; 
         FIG.  38    is a perspective view of a partially sectioned imaging lens module and an image sensor thereof with a circuit board and a substrate according to the 11th embodiment of the present disclosure; 
         FIG.  39    is a side view of the partially sectioned imaging lens module and the image sensor thereof with the circuit board and the substrate viewing from a DD direction in  FIG.  38   ; 
         FIG.  40    is a side view of the partially sectioned imaging lens module and the image sensor thereof with the circuit board and the substrate viewing from an EE direction in  FIG.  38   ; 
         FIG.  41    is a side view of the partially sectioned imaging lens module and the image sensor thereof with the circuit board and the substrate viewing from an FF direction in  FIG.  38   ; 
         FIG.  42    is an exploded view of the imaging lens module and the image sensor thereof with the circuit board and the substrate in  FIG.  38   ; 
         FIG.  43    is a cross-sectional view of the imaging lens module and the image sensor thereof with the circuit board and the substrate in  FIG.  42   ; 
         FIG.  44    is a cross-sectional view of a plastic lens barrel of the imaging lens module in  FIG.  43   ; 
         FIG.  45    is a perspective view of the plastic lens barrel of the imaging lens module in  FIG.  43   ; 
         FIG.  46    is a top view of the plastic lens barrel of the imaging lens module in  FIG.  43   ; 
         FIG.  47    is another perspective view of the plastic lens barrel of the imaging lens module in  FIG.  43   ; 
         FIG.  48    is a bottom view of the plastic lens barrel of the imaging lens module in  FIG.  43   ; 
         FIG.  49    is a front view of the image sensor of the imaging lens module with the circuit board and the substrate in  FIG.  42   ; 
         FIG.  50    is a partial and cross-sectional view of an electronic device and an image sensor thereof with a circuit board and a substrate according to the 12th embodiment of the present disclosure; 
         FIG.  51    is a perspective view of an electronic device according to the 13th embodiment of the present disclosure; and 
         FIG.  52    is a perspective view of the electronic device according to the 14th embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the disclosed embodiments. It will be apparent, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are schematically shown in order to simplify the drawing. 
     The present disclosure provides an imaging lens module includes an imaging lens assembly, an image sensor, and a plastic lens barrel. The imaging lens assembly has an optical axis and an image surface. The image sensor is disposed on an image side of the imaging lens assembly, and the image sensor has an image sensing surface facing towards the imaging lens assembly. Specifically, the image sensing surface can be disposed on the image surface of the imaging lens assembly. The optical axis passes through the image sensing surface. The image sensor can collaborate with a circuit board and a substrate, the image sensor is electrically connected to the circuit board, and the circuit board can abut on the substrate to be fixed thereon. Therefore, the imaging signal of the image sensor can be transmitted to the circuit board. Moreover, the circuit board can be a printed circuit board (PCB), or a flexible printed circuit (FPC). Moreover, the substrate can be a molded plastic substrate that can be used for circuit package. Therefore, such design is favorable for controlling dimensional accuracy and for better collaborating with the imaging lens module. In the assembly process, a preferable imaging position of the imaging lens assembly can be determined by a testing machine, and the image sensor can be adjusted to the preferable imaging position by structure correction or feedback control and thus can be mounted in the plastic lens barrel. As the mount position is confirmed, the image sensor can be preliminarily fixed and then electrically connected to the circuit board and other circuit component. Therefore, it is favorable for preventing assembly deviation of the image sensor and for providing a parts-dismantlable, parts-replacable and re-operatable assembly process, thereby ensuring assembly quality and increasing assembly yield rate. Moreover, a baking process can be performed in assembling the image sensor, and warpage will not occur on the image sensor and the imaging lens module since both of them can withstand the environment of the baking process. 
     The plastic lens barrel accommodates the imaging lens assembly. The plastic lens barrel can be made of black plastic material and can be manufactured in one piece by injection molding. Therefore, it is favorable for reducing light reflection in the plastic lens barrel and reducing manufacturing cost of the plastic lens barrel. The plastic lens barrel includes an object-end portion, a bottom portion, a first inner hole portion, and a second inner hole portion. Moreover, the bottom portion is located on an image side of the object-end portion, and the second inner hole portion is located on an image side of the first inner hole portion. Moreover, the bore of the first inner hole portion can be substantially circular, and the bore of the second inner hole portion can be substantially rectangular, but the present disclosure is not limited thereto. 
     The object-end portion has an object-end surface and at least one tapered surface, wherein the object-end surface faces towards an object side direction of the imaging lens assembly, and the at least one tapered surface is tapered off towards the object-end surface. 
     The bottom portion can have a top surface and a bottom surface. The bottom surface is located at a position of the bottom portion farthest away from the object-end portion, the top surface and the bottom surface are disposed opposite to each other, and the image sensing surface is located between the top surface and the bottom surface. Therefore, the design of the image sensor accommodated in the plastic lens barrel is favorable for preventing light leakage from the imaging lens module, effectively reducing non-imaging light into the image sensing surface and reducing stray light. Moreover, the bottom surface of the bottom portion can be substantially quadrilateral. Therefore, it is favorable for collaborating with the structure of the image sensor and for allowing a robotic arm to easily grip thereon during automated assembly. Please refer to  FIG.  10   , which shows a schematic view of the appearance of the bottom surface  1322  of the bottom portion  132  according to the 1st embodiment of the present disclosure, wherein the bottom surface  1322  of the embodiment is substantially quadrilateral. Moreover, the bottom surface of the bottom portion can be substantially rectangular. Therefore, it is favorable for using a non-axisymmetric design to be applicable to an arrangement in a relative small space. Please refer to  FIG.  47   , which shows a schematic view of the appearance of the bottom surface  6322  of the bottom portion  632  according to the  11 th embodiment of the present disclosure, wherein the bottom surface  6322  of the embodiment is substantially rectangular. Moreover, one side of the bottom surface of the bottom portion can be located closer to the object-end surface than the other three sides thereof. Therefore, it is favorable for providing a space for minute adjustment, such that the focus state of the image sensor can be further optimized. Please refer to  FIG.  15    and  FIG.  17   , which show schematic views of the bottom portion  232  according to the 3rd embodiment of the present disclosure, wherein one side  2322   a  of the bottom surface  2322  of the embodiment is located closer to the object-end surface  2311  than the other sides  2322   b  thereof. 
     The imaging lens assembly is disposed in the first inner hole portion. Specifically, the first inner hole portion can be formed with at least four inner parallel annular surfaces. The at least four inner parallel annular surfaces are disposed in parallel with the optical axis, and at least one of the at least four inner parallel annular surfaces is in physical contact with the imaging lens assembly. Therefore, it is favorable for ensuring the axial alignment of the imaging lens assembly so as to increase concentricity of the imaging lens module. 
     The second inner hole portion includes an optical aligning structure. Therefore, it is favorable for the plastic lens barrel to be assembled with the image sensor by the optical aligning structure, such that the imaging lens module can be quickly assembled, thereby increasing manufacturing efficiency. Specifically, the optical aligning structure can provide the image sensor a space for adjustment, such that the image sensor can be controlled at a particular position in any directions of the X, Y and Z axes; or, the optical aligning structure can provide collaboration with the image sensor in at least one direction by controlling dimensional accuracy, such that the image sensor is positioned at the particular position. Therefore, it is favorable for lessening the situation that the physical image sensing surface is overall offset and skew from the optical image surface, thereby achieving an effect that the optical aligning structure is used for the image sensing surface to be aligned with the image surface of the imaging lens assembly. That is, a relative position between the image sensing surface and the imaging lens assembly is aligned by the optical aligning structure. Also, both of the circular first inner hole portion and the rectangular second inner hole portion can align each element with the optical axis defined by the imaging lens assembly. Moreover, the image sensor can be provided with a structure collaborating with the optical aligning structure, wherein the structure collaborating with the optical aligning structure can be manufactured by a molding and packaging process technology, but the present disclosure is not limited thereto. Moreover, the optical aligning structure can have at least one inner bevel surface configured to be axially aligned with the image sensor, wherein the axial alignment refers to aligning the optical axis with a point such as the geometric center of the image sensing surface. Therefore, it is favorable for increasing tightness between the plastic lens barrel and the image sensor so as to improve assembly stability. Moreover, the optical aligning structure can further have at least one inner flat surface configured to maintain an axial position of the image sensor (e.g., a relative position between the image sensing surface and the imaging lens assembly in a direction in parallel with the optical axis). The at least one inner flat surface extends in a direction perpendicular to the optical axis, and the at least one inner flat surface and the at least one inner bevel surface are angled to each other. Therefore, it is favorable for simplifying assembly process so as to improve the efficiency and yield rate of automated production. 
     The plastic lens barrel has at least three gate traces. Therefore, it is favorable for the entire plastic lens barrel of the present disclosure, designed to include the bottom portion, to have dimensional accuracy precisely controlled on each detailed structure by the design of disposing three gate traces or more; also, it is favorable for easily focusing the image sensor to the imaging position by collaborating with the assembly between the imaging lens assembly and the image sensor. Moreover, the at least three gate traces can be disposed on the bottom portion of the plastic lens barrel. Therefore, it is favorable for maintaining consistency of the injection direction so as to reduce the occurrence of incomplete filling during injection molding. 
     When a standard deviation of minimum distances between each of the at least three gate traces and the optical axis is dg_std, and an aperture diameter of the imaging lens module is ϕs, the following condition is satisfied: 0[mm]≤dg_std&lt;1.0×ϕs [mm]. Therefore, it is favorable for the gate traces to be provided in a relatively applicable position range and for ensuring optical quality of the imaging lens module because the forming tolerance of the plastic lens barrel is relatively small under this condition. Moreover, the following condition can also be satisfied: 0[mm]≤dg_std&lt;0.85×ϕs[mm]. Therefore, it is favorable for maintaining high-precision molding quality and for providing such condition range for a faster molding rate, and thus it is favorable for molding a plastic lens barrel with a relatively complicated structure. Moreover, the following condition can also be satisfied: 0[mm]≤dg_std&lt;0.7×ϕs[mm]. Therefore, it is favorable for ensuring structural integrity of the optical aperture, thereby preventing stray light due to structural defects. Moreover, the following condition can also be satisfied: 0[mm]≤dg_std&lt;0.45×ϕs[mm]. Therefore, it is favorable for the gate traces to be designed applicable to a non-axisymmetric plastic lens barrel, for maintaining applicability between the first inner hole portion of the plastic lens barrel and the imaging lens assembly and between the second inner hole portion of the plastic lens barrel and the image sensor and for providing optical image with high quality for the non-axisymmetric plastic lens barrel. It is noted that minimum distances between each of the at least three gate traces and the optical axis are respectively dg 1 , dg 2 , dg 3 , . . . , and dgN, an average value of the minimum distances is dg_avg=(Σdgi)/N, and the standard deviation of the minimum distances is dg_std=√{[Σ(dgi−dg_avg) 2 ]/N}, wherein i=1, 2, 3, . . . , N, and N refers to the number of the gate traces which is not smaller than three. In addition, the optical aperture of the imaging lens module surrounds the optical axis. The optical aperture can be the minimum inner hole of the plastic lens barrel or one optical element of the imaging lens assembly, and the present disclosure is not limited thereto. Please refer to  FIG.  9   , which shows a schematic view of the minimum distances dg 1 , dg 2 , dg 3 , and dg 4  between each of the gate traces  135  ( 135   a ,  135   b ,  135   c , and  135   d ) and the optical axis  110  according to the 1st embodiment of the present disclosure, wherein the number of the gate traces  135  is four. Please refer to  FIG.  7   , which shows a schematic view of the aperture diameter ϕs according to the 1st embodiment of the present disclosure, wherein the optical aperture  130  is the minimum inner hole of the plastic lens barrel  13 , but the disclosure is not limited thereto. Please refer to  FIG.  32   , which shows a schematic view of the aperture stop  511   a  according to the 9th embodiment of the present disclosure, wherein the aperture stop  511   a  is one of the optical elements  511  of the imaging lens assembly  51 . 
     When a length of the second inner hole portion in the direction in parallel with the optical axis is Lr, the following condition can be satisfied: 0.2[mm]&lt;Lr&lt;2.7[mm]. Therefore, it is favorable for providing the image sensor a sufficient disposing space and thus for preventing being offset and skew while being assembled and aligned. Moreover, the following condition can also be satisfied: 0.3[mm]&lt;Lr&lt;2.2[mm]. Therefore, it is favorable for providing the image sensor a more proper disposing space and thus for having better assembling and aligning efficiency. Please refer to  FIG.  7   , which shows a schematic view of the length Lr of the second inner hole portion  134  in the direction in parallel with the optical axis  110  according to the 1st embodiment of the present disclosure. 
     When an area surrounded by the object-end surface is Af, and an area surrounded by the bottom portion is Ab, the following condition can be satisfied: 0&lt;Af/Ab&lt;0.35. Therefore, the design of the imaging lens module with a relative small size at an object side thereof is favorable for increasing the melt flow rate of the plastic material while being injection-molded and for miniaturizing the imaging lens module. Moreover, the following condition can also be satisfied: 0&lt;Af/Ab≤0.28. Therefore, the design of the imaging lens module with a smaller size at the object side thereof collaborating with the tapered surface is favorable for enhancing structural strength between the object-end surface and the bottom surface. It is noted that the area surrounded by the object-end surface refers to the area surrounded by the outer edge of the most object side of the object-end portion and can be presented as Af=π(ϕo/2) 2 , wherein ϕo refers to the outer diameter of the object-end surface. In addition, the area surrounded by the bottom portion refers to the area surrounded by the outer edge of the most image side of the bottom portion and is approximately equal to the long side multiplied by the short side of the bottom portion. 
     When an angle between the at least one tapered surface and the optical axis is α, the following condition can be satisfied: 1[deg.]≤α≤65[deg.]. Therefore, it is favorable for providing a small object-side lens design and for allowing the flow of the plastic material more uniform and smooth while being injection-molded. Please refer to  FIG.  7   , which shows a schematic view of the angles α (α 1 , α 2 , and α 3 ) between the tapered surfaces  1312  and the optical axis  110  according to the 1st embodiment of the present disclosure, wherein the number of the tapered surfaces  1312  is three. 
     The present disclosure provides an electronic device including the aforementioned imaging lens module and a display module, wherein the display module is located on an object side of the imaging lens module. The display module can include a display panel, a backlight panel, a touch panel, a glass substrate or a protective plate, but the present disclosure is not limited thereto. Therefore, it is favorable for feasibility of providing an under-screen lens. 
     The top surface of the bottom portion of the imaging lens module is configured to have a supporting function for the display module to abut thereon. Therefore, it is favorable for increasing structural stability and reducing the possibility that light of the display module enters the imaging lens module. Please refer to  FIG.  25   , which shows a schematic view of the display module  39  abutting on the top surface  3321  of the bottom portion  332  according to the 6th embodiment of the present disclosure. Moreover, the display module can further include spacer such as cushion, plastic plate or metal plate, but the present disclosure is not limited thereto. Therefore, it is favorable for preventing the relative precise panel in the display module from being in direct contact with the top surface of the bottom portion so as to ensure normal working of the display module. 
     The plastic lens barrel of the imaging lens module can further include a step surface disposed opposite to the bottom surface. At least one of the top surface and the step surface is configured to have a supporting function for the display module to abut thereon. Therefore, it is favorable for increasing structural stability, for designing imaging lens modules to collaborate with different specifications of the display module and for reducing the possibility that light of the display module enters the imaging lens module. Please refer to  FIG.  13   , which shows a schematic view of the display module  19  abutting on the step surface  139  of the plastic lens barrel  13  according to the 2nd embodiment of the present disclosure. 
     According to the present disclosure, the aforementioned features and conditions can be utilized in numerous combinations so as to achieve corresponding effects. 
     According to the above description of the present disclosure, the following specific embodiments are provided for further explanation. 
     1st Embodiment 
     Please refer to  FIG.  1    to  FIG.  12   , where  FIG.  1    is a perspective view of a partially sectioned imaging lens module and an image sensor thereof with a circuit board and a substrate according to the 1st embodiment of the present disclosure,  FIG.  2    is a side view of the partially sectioned imaging lens module and the image sensor thereof with the circuit board and the substrate viewing from an AA direction in  FIG.  1   ,  FIG.  3    is a side view of the partially sectioned imaging lens module and the image sensor thereof with the circuit board and the substrate viewing from a BB direction in  FIG.  1   ,  FIG.  4    is a side view of the partially sectioned imaging lens module and the image sensor thereof with the circuit board and the substrate viewing from a CC direction in  FIG.  1   ,  FIG.  5    is an exploded view of the imaging lens module and the image sensor thereof with the circuit board and the substrate in  FIG.  1   ,  FIG.  6    is a cross-sectional view of the imaging lens module and the image sensor thereof with the circuit board and the substrate in  FIG.  5   ,  FIG.  7    is a cross-sectional view of a plastic lens barrel of the imaging lens module in  FIG.  6   ,  FIG.  8    is a perspective view of the plastic lens barrel of the imaging lens module in  FIG.  6   ,  FIG.  9    is a top view of the plastic lens barrel of the imaging lens module in  FIG.  6   ,  FIG.  10    is another perspective view of the plastic lens barrel of the imaging lens module in  FIG.  6   ,  FIG.  11    is a bottom view of the plastic lens barrel of the imaging lens module in  FIG.  6   , and  FIG.  12    is a front view of the image sensor of the imaging lens module with the circuit board and the substrate in  FIG.  5   . 
     In this embodiment, an imaging lens module  10  is configured to be disposed on a circuit board  16  and a substrate  17 , wherein the circuit board  16  is fixedly disposed on the substrate  17  by abutting thereon. The imaging lens module  10  includes an imaging lens assembly  11 , an image sensor  12 , and a plastic lens barrel  13 . The imaging lens assembly  11  has an optical axis  110  and an image surface  119  and includes a plurality of optical elements  111 , wherein the optical elements  111  include, for example, a lens element, a light-blocking element, an aperture stop, a stop, a spacer, a retainer, etc., and the present disclosure is not limited thereto. The optical axis  110  passes through the optical elements  111  and the image surface  119 . The image sensor  12  is disposed on an image side of the imaging lens assembly  11 , and the image sensor  12  has an image sensing surface  120  facing towards the imaging lens assembly  11 . Specifically, the image sensing surface  120  is disposed on the image surface  119  of the imaging lens assembly  11 , and the optical axis  110  passes through the image sensing surface  120 . The image sensor  12  is electrically connected to the circuit board  16  so as to collaborate with the circuit board  16  and the substrate  17 . The plastic lens barrel  13  accommodates the imaging lens assembly  11  and the image sensor  12 . That is, both of the imaging lens assembly  11  and the image sensor  12  are disposed in the plastic lens barrel  13 . The plastic lens barrel  13  is made of black plastic material and is an axisymmetric lens barrel (shown in  FIG.  9    and  FIG.  11   ) manufactured in one piece by injection molding, wherein the optical axis  110  substantially passes through the geometric center of the plastic lens barrel  13 . 
     The minimum inner hole at an object side of the plastic lens barrel  13  forms an optical aperture  130  which surrounds the optical axis  110 . The plastic lens barrel  13  includes an object-end portion  131 , a bottom portion  132 , a first inner hole portion  133 , a second inner hole portion  134 , and four gate traces  135 . The bottom portion  132  is located on an image side of the object-end portion  131 , the second inner hole portion  134  is located on an image side of the first inner hole portion  133 , and the gate traces  135  are disposed on one side of the bottom portion  132  located away from the optical axis  110 . 
     The object-end portion  131  has an object-end surface  1311  and three tapered surfaces  1312 . The tapered surfaces  1312  are located on an image side of the object-end surface  1311 . The object-end surface  1311  faces towards an object side direction of the imaging lens assembly  11 . The tapered surfaces  1312  are tapered off towards the object-end surface  1311 . The bottom portion  132  has a top surface  1321  and a bottom surface  1322 . The bottom surface  1322  is located on an image side of the top surface  1321 . Specifically, the bottom surface  1322  is substantially quadrilateral (shown in  FIG.  10    and  FIG.  11   ) and is located at a position of the bottom portion  132  farthest away from the object-end portion  131 . The top surface  1321  and the bottom surface  1322  are disposed opposite to each other, and the image sensing surface  120  is located between the top surface  1321  and the bottom surface  1322 . 
     The bore of the first inner hole portion  133  is substantially circular (shown in  FIG.  10    and  FIG.  11   ). The imaging lens assembly  11  is disposed in the first inner hole portion  133 . Specifically, the first inner hole portion  133  has six inner parallel annular surfaces  1331 . The six inner parallel annular surfaces  1331  are disposed in parallel with the optical axis  110 , and the six inner parallel annular surfaces  1331  are respectively in physical contact with at least six of the optical elements  111  of the imaging lens assembly  11 . 
     The bore of the second inner hole portion  134  is substantially rectangular (shown in  FIG.  10    and  FIG.  11   ). The second inner hole portion  134  includes an optical aligning structure  1341 . A relative position between the image sensing surface  120  and the imaging lens assembly  11  is aligned by the optical aligning structure  1341 . Specifically, the optical aligning structure  1341  has an inner bevel surface  1341   a . The image sensor  12  is axially aligned with the optical aligning structure  1341  and aligned with the image surface  119  of the imaging lens assembly  11  through the slope of the inner bevel surface  1341   a  and the substrate  17  abutted on each other. In addition, the optical axis  110  is aligned with the geometric center of the image sensing surface  120  by the aforementioned axial alignment. 
     When minimum distances between each of the gate traces  135  ( 135   a ,  135   b ,  135   c , and  135   d ) and the optical axis  110  are respectively dg 1  , dg 2 , dg 3 , and dg 4 , the following conditions are satisfied: dg 1 =dg 2 =dg 3 =dg 4 =3.77[mm]. When an average value of the minimum distances dg 1 , dg 2 , dg 3 , and dg 4  is dg_avg=(Σdgi)/4, wherein i=1, 2, 3, and 4, the following condition is satisfied: dg_avg=3.77[mm]. When a standard deviation of the minimum distances dg 1 , dg 2 , dg 3 , and dg 4  between each of the gate traces  135  and the optical axis  110  is dg_std=√{[Σ(dgi−dg_avg) 2 ]/4}, wherein i=1, 2, 3, and 4, the following condition is satisfied: dg_std=0[mm]. When a diameter of the optical aperture  130  of the imaging lens module  10  is ϕs, the following condition is satisfied: ϕs=1.67[mm]. 
     When a length of the second inner hole portion  134  in a direction in parallel with the optical axis  110  is Lr, the following condition is satisfied: Lr=0.7[mm]. 
     When an area surrounded by the object-end surface  1311  is Af, and an area surrounded by the bottom portion  132  is Ab, the following condition is satisfied: Af/Ab=0.09, wherein Af=3.61[mm 2 ], and Ab=39.91[mm 2 ]. 
     When angles between each of the tapered surfaces  1312  ( 1312   a ,  1312   b , and  1312   c ) and the optical axis  110  are α 1 , α 2 , and α 3 , the following conditions are satisfied: α 1 =3[deg.]; α 2 =25[deg.]; and α 3 =15[deg.]. 
     2nd Embodiment 
     Please refer to  FIG.  13   , which is a partial and cross-sectional view of an electronic device and an image sensor thereof with a circuit board and a substrate according to the 2nd embodiment of the present disclosure. Note that only the differences between this and the previous embodiment are illustrated hereinafter. 
     In this embodiment, an electronic device  1  includes the imaging lens module  10  disclosed in the 1st embodiment and a display module  19 . The display module  19  is located on an object side of the imaging lens module  10 . Specifically, the display module  19  includes a glass substrate  19   a  and a backlight panel  19   b , and the glass substrate  19   a  is located on an object side of the backlight panel  19   b  and the object side of the imaging lens module  10 . The plastic lens barrel  13  of the imaging lens module  10  further includes a step surface  139  disposed opposite to the bottom surface  1322 , and the top surface  1321  is located between the step surface  139  and the bottom surface  1322 . The backlight panel  19   b  of the display module  19  abuts on the step surface  139  of the plastic lens barrel  13 , and the optical aperture  130  is located in the gap range of the backlight panel  19   b  and is exposed by the glass substrate  19   a.    
     3rd Embodiment 
     Please refer to  FIG.  14    to  FIG.  18   , where  FIG.  14    is a cross-sectional view of an imaging lens module and an image sensor thereof with a circuit board and a substrate according to the 3rd embodiment of the present disclosure,  FIG.  15    is a cross-sectional view of a plastic lens barrel of the imaging lens module in  FIG.  14   ,  FIG.  16    is a top view of the plastic lens barrel of the imaging lens module in  FIG.  14   , 
       FIG.  17    is a bottom view of the plastic lens barrel of the imaging lens module in  FIG.  14   , and  FIG.  18    is a front view of the image sensor of the imaging lens module with the circuit board and the substrate in  FIG.  14   . 
     In this embodiment, an imaging lens module  20  is configured to be disposed on a circuit board  26  and a substrate  27 , wherein the circuit board  26  is fixedly disposed on the substrate  27  by abutting thereon. The imaging lens module  20  includes an imaging lens assembly  21 , an image sensor  22 , and a plastic lens barrel  23 . The imaging lens assembly  21  has an optical axis  210  and an image surface  219  and includes a plurality of optical elements  211 , wherein the optical elements  211  include, for example, a lens element, a light-blocking element, an aperture stop, a stop, a spacer, a retainer, etc., and the present disclosure is not limited thereto. The optical axis  210  passes through the optical elements  211  and the image surface  219 . The image sensor  22  is disposed on an image side of the imaging lens assembly  21 , and the image sensor  22  has an image sensing surface  220  facing towards the imaging lens assembly  21 . Specifically, the image sensing surface  220  is disposed on the image surface  219  of the imaging lens assembly  21 , and the optical axis  210  passes through the image sensing surface  220 . The image sensor  22  is electrically connected to the circuit board  26  so as to collaborate with the circuit board  26  and the substrate  27 . The plastic lens barrel  23  accommodates the imaging lens assembly  21  and the image sensor  22 . That is, both of the imaging lens assembly  21  and the image sensor  22  are disposed in the plastic lens barrel  23 . The plastic lens barrel  23  is made of black plastic material and is an axisymmetric lens barrel (shown in  FIG.  16    and  FIG.  17   ) manufactured in one piece by injection molding, wherein the optical axis  210  substantially passes through the geometric center of the plastic lens barrel  23 . 
     The minimum inner hole at an object side of the plastic lens barrel  23  forms an optical aperture  230  which surrounds the optical axis  210 . The plastic lens barrel  23  includes an object-end portion  231 , a bottom portion  232 , a first inner hole portion  233 , a second inner hole portion  234 , and four gate traces  235 . The bottom portion  232  is located on an image side of the object-end portion  231 , the second inner hole portion  234  is located on an image side of the first inner hole portion  233 , and the gate traces  235  are disposed on one side of the bottom portion  232  located away from the optical axis  210 . 
     The object-end portion  231  has an object-end surface  2311  and three tapered surfaces  2312 . The tapered surfaces  2312  are located on an image side of the object-end surface  2311 . The object-end surface  2311  faces towards an object side direction of the imaging lens assembly  21 . The tapered surfaces  2312  are tapered off towards the object-end surface  2311 . The bottom portion  232  has a top surface  2321  and a bottom surface  2322 . The bottom surface  2322  is located on an image side of the top surface  2321 . Specifically, the bottom surface  2322  is substantially quadrilateral (shown in  FIG.  17   ) and is located at a position of the bottom portion  232  farthest away from the object-end portion  231 . The top surface  2321  and the bottom surface  2322  are disposed opposite to each other, and the image sensing surface  220  is located between the top surface  2321  and the bottom surface  2322 . One side  2322   a  of the bottom surface  2322  is located closer to the object-end surface  2311  than the other sides  2322   b  thereof. 
     The bore of the first inner hole portion  233  is substantially circular (shown in  FIG.  17   ). The imaging lens assembly  21  is disposed in the first inner hole portion  233 . Specifically, the first inner hole portion  233  has six inner parallel annular surfaces  2331 . The six inner parallel annular surfaces  2331  are disposed in parallel with the optical axis  210 , and the six inner parallel annular surfaces  2331  are respectively in physical contact with at least six of the optical elements  211  of the imaging lens assembly  21 . 
     The bore of the second inner hole portion  234  is substantially rectangular (shown in  FIG.  17   ). The second inner hole portion  234  includes an optical aligning structure  2341 . A relative position between the image sensing surface  220  and the imaging lens assembly  21  is aligned by the optical aligning structure  2341 . Specifically, the optical aligning structure  2341  has an inner bevel surface  2341   a . The image sensor  22  is axially aligned with the optical aligning structure  2341  and aligned with the image surface  219  of the imaging lens assembly  21  through the slope of the inner bevel surface  2341   a  and the substrate  27  abutted on each other. In addition, the optical axis  210  is aligned with the geometric center of the image sensing surface  220  by the aforementioned axial alignment. 
     When minimum distances between each of the gate traces  235  ( 235   a ,  235   b ,  235   c , and  235   d ) and the optical axis  210  are respectively dg 1 , dg 2 , dg 3 , and dg 4 , the following conditions are satisfied: dg 1 =dg 2 =dg 3 =dg 4 =2.97[mm]. When an average value of the minimum distances dg 1 , dg 2 , dg 3 , and dg 4  is dg_avg=(Σdgi)/4, wherein i=1, 2, 3, and 4, the following condition is satisfied: dg_avg=2.97[mm]. When a standard deviation of the minimum distances dg 1 , dg 2 , dg 3 , and dg 4  between each of the gate traces  235  and the optical axis  210  is dg_std=√{[Σ(dgi−dg_avg) 2]/4 }, wherein i=1, 2, 3, and 4, the following condition is satisfied: dg_std=0[mm]. When a diameter of the optical aperture  230  of the imaging lens module  20  is ϕs, the following condition is satisfied: ϕs=1.67[mm]. 
     When a length of the second inner hole portion  234  in a direction in parallel with the optical axis  210  is Lr, the following condition is satisfied: Lr=0.75[mm]. 
     When an area surrounded by the object-end surface  2311  is Af, and an area surrounded by the bottom portion  232  is Ab, the following condition is satisfied: Af/Ab=0.09, wherein Af=3.61[mm 2 ], and Ab=40.07[mm 2 ]. 
     When angles between each of the tapered surfaces  2312  ( 2312   a ,  2312   b , and  2312   c ) and the optical axis  210  are α 1 , α 2 , and α 3 , the following conditions are satisfied: α 1 =3[deg.]; α 2 =25[deg.]; and α 3 =15[deg.]. 
     4th Embodiment 
     Please refer to  FIG.  19   , which is a partial and cross-sectional view of an electronic device and an image sensor thereof with a circuit board and a substrate according to the 4th embodiment of the present disclosure. Note that only the differences between this and the previous embodiment are illustrated hereinafter. 
     In this embodiment, an electronic device  2  includes the imaging lens module  20  disclosed in the 3rd embodiment and a display module  29 . The display module  29  is located on an object side of the imaging lens module  20 . Specifically, the display module  29  includes a glass substrate  29   a  and a backlight panel  29   b , and the glass substrate  29   a  is located on an object side of the backlight panel  29   b  and the object side of the imaging lens module  20 . The plastic lens barrel  23  of the imaging lens module  20  further includes a step surface  239  disposed opposite to the bottom surface  2322 , and the top surface  2321  is located between the step surface  239  and the bottom surface  2322 . The backlight panel  29   b  of the display module  29  indirectly abuts on the top surface  2321  of the plastic lens barrel  23  through a spacer (not shown), and the optical aperture  230  and the step surface  239  are located in the gap range of the backlight panel  29   b  and are exposed by the glass substrate  29   a.    
     5th Embodiment 
     Please refer to  FIG.  20    to  FIG.  24   , where  FIG.  20    is a cross-sectional view of an imaging lens module and an image sensor thereof with a circuit board and a substrate according to the 5th embodiment of the present disclosure,  FIG.  21    is a cross-sectional view of a plastic lens barrel of the imaging lens module in  FIG.  20   ,  FIG.  22    is a top view of the plastic lens barrel of the imaging lens module in  FIG.  20   ,  FIG.  23    is a bottom view of the plastic lens barrel of the imaging lens module in  FIG.  20   , and  FIG.  24    is a front view of the image sensor of the imaging lens module with the circuit board and the substrate in  FIG.  20   . 
     In this embodiment, an imaging lens module  30  is configured to be disposed on a circuit board  36  and a substrate  37 , wherein the circuit board  36  is disposed on the substrate  37  and is located between the imaging lens module  30  and the substrate  37 . The imaging lens module  30  includes an imaging lens assembly  31 , an image sensor  32 , and a plastic lens barrel  33 . The imaging lens assembly  31  has an optical axis  310  and an image surface  319  and includes a plurality of optical elements  311 , wherein the optical elements  311  include, for example, a lens element, a light-blocking element, an aperture stop, a stop, a spacer, a retainer, etc., and the present disclosure is not limited thereto. The optical axis  310  passes through the optical elements  311  and the image surface  319 . The image sensor  32  is disposed on an image side of the imaging lens assembly  31 , and the image sensor  32  has an image sensing surface  320  facing towards the imaging lens assembly  31 . Specifically, the image sensing surface  320  is disposed on the image surface  319  of the imaging lens assembly  31 , and the optical axis  310  passes through the image sensing surface  320 . The image sensor  32  is electrically connected to the circuit board  36  so as to collaborate with the circuit board  36  and the substrate  37 . The plastic lens barrel  33  accommodates the imaging lens assembly  31  and the image sensor  32 . That is, both of the imaging lens assembly  31  and the image sensor  32  are disposed in the plastic lens barrel  33 . The plastic lens barrel  33  is made of black plastic material and is an axisymmetric lens barrel (shown in  FIG.  22    and  FIG.  23   ) manufactured in one piece by injection molding, wherein the optical axis  310  substantially passes through the geometric center of the plastic lens barrel  33 . 
     The minimum inner hole at an object side of the plastic lens barrel  33  forms an optical aperture  330  which surrounds the optical axis  310 . The plastic lens barrel  33  includes an object-end portion  331 , a bottom portion  332 , a first inner hole portion  333 , a second inner hole portion  334 , and four gate traces  335 . The bottom portion  332  is located on an image side of the object-end portion  331 , the second inner hole portion  334  is located on an image side of the first inner hole portion  333 , and the gate traces  335  are disposed on one side of the bottom portion  332  located away from the optical axis  310 . 
     The object-end portion  331  has an object-end surface  3311  and two tapered surfaces  3312 . The tapered surfaces  3312  are located on an image side of the object-end surface  3311 . The object-end surface  3311  faces towards an object side direction of the imaging lens assembly  31 . The tapered surfaces  3312  are tapered off towards the object-end surface  3311 . The bottom portion  332  has a top surface  3321  and a bottom surface  3322 . The bottom surface  3322  is located on an image side of the top surface  3321 . Specifically, the bottom surface  3322  is substantially quadrilateral (shown in  FIG.  23   ) and is located at a position of the bottom portion  332  farthest away from the object-end portion  331 . The top surface  3321  and the bottom surface  3322  are disposed opposite to each other, and the image sensing surface  320  is located between the top surface  3321  and the bottom surface  3322 . One side  3322   a  of the bottom surface  3322  is located closer to the object-end surface  3311  than the other sides  3322   b  thereof. 
     The bore of the first inner hole portion  333  is substantially circular (shown in  FIG.  23   ). The imaging lens assembly  31  is disposed in the first inner hole portion  333 . Specifically, the first inner hole portion  333  has ten inner parallel annular surfaces  3331 . The ten inner parallel annular surfaces  3331  are disposed in parallel with the optical axis  310 , and the ten inner parallel annular surfaces  3331  are respectively in physical contact with at least ten of the optical elements  311  of the imaging lens assembly  31 . 
     The bore of the second inner hole portion  334  is substantially rectangular (shown in  FIG.  23   ). The second inner hole portion  334  includes an optical aligning structure  3341 . A relative position between the image sensing surface  320  and the imaging lens assembly  31  is aligned by the optical aligning structure  3341 . Specifically, the optical aligning structure  3341  has an inner bevel surface  3341   a  and an inner flat surface  3341   b , wherein the inner flat surface  3341   b  extends in a direction perpendicular to the optical axis  310  and the inner flat surface  3341   b  and the inner bevel surface  3341   a  are angled to each other. The image sensor  32  is axially aligned with the optical aligning structure  3341  through the inner bevel surface  3341   a  and the image sensor  32  abutted on each other. The axial position of the image sensor  32  (e.g., the relative position between the image sensing surface  320  and the imaging lens assembly  31  in a direction in parallel with the optical axis  310 ) is maintained through the inner flat surface  3341   b  and the image sensor  32  indirectly abutted on each other via at least one of the optical elements  311  located therebetween. Accordingly, the image sensor  32  is aligned with the image surface  319  of the imaging lens assembly  31 , and the optical axis  310  is perpendicular to the image sensing surface  320  in a non-skew manner. In addition, the optical axis  310  is aligned with the geometric center of the image sensing surface  320  by the aforementioned axial alignment. 
     When minimum distances between each of the gate traces  335  ( 335   a ,  335   b ,  335   c , and  335   d ) and the optical axis  310  are respectively dg 1 , dg 2 , dg 3 , and dg 4 , the following conditions are satisfied: dg 1 =dg 2 =dg 3 =dg 4 =5.21[mm]. When an average value of the minimum distances dg 1 , dg 2 , dg 3 , and dg 4  is dg_avg=(Σdgi)/4, wherein i=1, 2, 3, and 4, the following condition is satisfied: dg_avg=5.21[mm]. When a standard deviation of the minimum distances dg 1 , dg 2 , dg 3 , and dg 4  between each of the gate traces  335  and the optical axis  310  is dg_std=√{[Σ(dgi−dg_avg) 2]/4 }, wherein i=1, 2, 3, and 4, the following condition is satisfied: dg_std=0[mm]. When a diameter of the optical aperture  330  of the imaging lens module  30  is ϕs, the following condition is satisfied: ϕs=1.52[mm]. 
     When a length of the second inner hole portion  334  in the direction in parallel with the optical axis  310  is Lr, the following condition is satisfied: Lr=0.893[mm]. 
     When an area surrounded by the object-end surface  3311  is Af, and an area surrounded by the bottom portion  332  is Ab, the following condition is satisfied: Af/Ab=0.05, wherein Af=3.61[mm 2 ], and Ab=74.78[mm 2 ]. 
     When angles between each of the tapered surfaces  3312  ( 3312   a  and  3312   b ) and the optical axis  310  are α 1  and α 2 , the following conditions are satisfied: α 1 =5[deg.]; and α 2  =47[deg.]. 
     6th Embodiment 
     Please refer to  FIG.  25   , which is a partial and cross-sectional view of an electronic device and an image sensor thereof with a circuit board and a substrate according to the 6th embodiment of the present disclosure. Note that only the differences between this and the previous embodiment are illustrated hereinafter. 
     In this embodiment, an electronic device  3  includes the imaging lens module  30  disclosed in the 5th embodiment and a display module  39 . The display module  39  is located on an object side of the imaging lens module  30 . Specifically, the display module  39  includes a glass substrate  39   a  and a backlight panel  39   b , and the glass substrate  39   a  is located on an object side of the backlight panel  39   b  and the object side of the imaging lens module  30 . The plastic lens barrel  33  of the imaging lens module  30  further includes a step surface  339  disposed opposite to the bottom surface  3322 , and the step surface  339  is located between the top surface  3321  and the bottom surface  3322 . The backlight panel  39   b  of the display module  39  abuts on the top surface  3321  of the plastic lens barrel  33 , and the optical aperture  330  is located in the gap range of the backlight panel  39   b  and are exposed by the glass substrate  39   a.    
     7th Embodiment 
     Please refer to  FIG.  26    to  FIG.  30   , where  FIG.  26    is a cross-sectional view of an imaging lens module and an image sensor thereof with a circuit board and a substrate according to the 7th embodiment of the present disclosure,  FIG.  27    is a cross-sectional view of a plastic lens barrel of the imaging lens module in  FIG.  26   ,  FIG.  28    is a top view of the plastic lens barrel of the imaging lens module in  FIG.  26   ,  FIG.  29    is a bottom view of the plastic lens barrel of the imaging lens module in  FIG.  26   , and  FIG.  30    is a front view of the image sensor of the imaging lens module with the circuit board and the substrate in  FIG.  26   . 
     In this embodiment, an imaging lens module  40  is configured to be disposed on a substrate  47 , wherein there is a circuit board  46  disposed on one side of the substrate  47 . The imaging lens module  40  includes an imaging lens assembly  41 , an image sensor  42 , and a plastic lens barrel  43 . The imaging lens assembly  41  has an optical axis  410  and an image surface  419  and includes a plurality of optical elements  411 , wherein the optical elements  411  include, for example, a lens element, a light-blocking element, an aperture stop, a stop, a spacer, a retainer, etc., and the present disclosure is not limited thereto. The optical axis  410  passes through the optical elements  411  and the image surface  419 . The image sensor  42  is disposed on an image side of the imaging lens assembly  41 , and the image sensor  42  has an image sensing surface  420  facing towards the imaging lens assembly  41 . Specifically, the image sensing surface  420  is disposed on the image surface  419  of the imaging lens assembly  41 , and the optical axis  410  passes through the image sensing surface  420 . The image sensor  42  is electrically connected to the circuit board  46  via the substrate  47  so as to collaborate with the circuit board  46  and the substrate  47 . The plastic lens barrel  43  accommodates the imaging lens assembly  41  and the image sensor  42 . That is, both of the imaging lens assembly  41  and the image sensor  42  are disposed in the plastic lens barrel  43 . The plastic lens barrel  43  is made of black plastic material and is a non-axisymmetric lens barrel (shown in  FIG.  28    and  FIG.  29   ) manufactured in one piece by injection molding, wherein the optical axis  410  does not pass through the geometric center of the plastic lens barrel  43 . 
     The minimum inner hole at an object side of the plastic lens barrel  43  forms an optical aperture  430  which surrounds the optical axis  410 . The plastic lens barrel  43  includes an object-end portion  431 , a bottom portion  432 , a first inner hole portion  433 , a second inner hole portion  434 , and four gate traces  435 . The bottom portion  432  is located on an image side of the object-end portion  431 , the second inner hole portion  434  is located on an image side of the first inner hole portion  433 , and the gate traces  435  are disposed on one side of the bottom portion  432  located away from the optical axis  410 . 
     The object-end portion  431  has an object-end surface  4311  and three tapered surfaces  4312 . The tapered surfaces  4312  are located on an image side of the object-end surface  4311 . The object-end surface  4311  faces towards an object side direction of the imaging lens assembly  41 . The tapered surfaces  4312  are tapered off towards the object-end surface  4311 . The bottom portion  432  has a top surface  4321  and a bottom surface  4322 . The bottom surface  4322  is located on an image side of the top surface  4321 . Specifically, the bottom surface  4322  is substantially quadrilateral (shown in  FIG.  29   ) and is located at a position of the bottom portion  432  farthest away from the object-end portion  431 . The top surface  4321  and the bottom surface  4322  are disposed opposite to each other, and the image sensing surface  420  is located between the top surface  4321  and the bottom surface  4322 . 
     The bore of the first inner hole portion  433  is substantially circular (shown in  FIG.  29   ). The imaging lens assembly  41  is disposed in the first inner hole portion  433 . Specifically, the first inner hole portion  433  has nine inner parallel annular surfaces  4331 . The nine inner parallel annular surfaces  4331  are disposed in parallel with the optical axis  410 , and the nine inner parallel annular surfaces  4331  are respectively in physical contact with at least nine of the optical elements  411  of the imaging lens assembly  41 . 
     The bore of the second inner hole portion  434  is substantially rectangular (shown in  FIG.  29   ). The second inner hole portion  434  includes an optical aligning structure  4341 . A relative position between the image sensing surface  420  and the imaging lens assembly  41  is aligned by the optical aligning structure  4341 . Specifically, the optical aligning structure  4341  has an inner bevel surface  4341   a  and an inner flat surface  4341   b , wherein the inner flat surface  4341   b  extends in a direction perpendicular to the optical axis  410  and the inner flat surface  4341   b  and the inner bevel surface  4341   a  are angled to each other. The image sensor  42  is axially aligned with the optical aligning structure  4341  through the slope of the inner bevel surface  4341   a  and the image sensor  42  abutted on each other. The axial position of the image sensor  42  (e.g., the relative position between the image sensing surface  420  and the imaging lens assembly  41  in a direction in parallel with the optical axis  410 ) is maintained through the inner flat surface  4341   b  and the image sensor  42  abutted on each other. Accordingly, the image sensor  42  is aligned with the image surface  419  of the imaging lens assembly  41 , and the optical axis  410  is perpendicular to the image sensing surface  420  in a non-skew manner. In addition, the optical axis  410  is aligned with the geometric center of the image sensing surface  420  by the aforementioned axial alignment. 
     When minimum distances between each of the gate traces  435  ( 435   a ,  435   b ,  435   c , and  435   d ) and the optical axis  410  are respectively dg 1 , dg 2 , dg 3 , and dg 4 , the following conditions are satisfied: dg 1 =4.72[mm]; dg 2 =5.33[mm]; dg 3 =5.58[mm]; and dg 4 =6.03[mm]. When an average value of the minimum distances dg 1 , dg 2 , dg 3 , and dg 4  is dg_avg=(Σdgi)/4, wherein i=1, 2, 3, and 4, the following condition is satisfied: dg_avg=5.42[mm]. When a standard deviation of the minimum distances dg 1 , dg 2 , dg 3 , and dg 4  between each of the gate traces  435  and the optical axis  410  is dg_std=√{[Σ(dgi−dg_avg) 2 ]/4}, wherein i=1, 2, 3, and 4, the following condition is satisfied: dg_std=0.473[mm]. When a diameter of the optical aperture  430  of the imaging lens module  40  is ϕs, the following condition is satisfied: ϕs=1.13[mm]. 
     When a length of the second inner hole portion  434  in the direction in parallel with the optical axis  410  is Lr, the following condition is satisfied: Lr=0.42[mm]. 
     When an area surrounded by the object-end surface  4311  is Af, and an area surrounded by the bottom portion  432  is Ab, the following condition is satisfied: Af/Ab=0.06, wherein Af=4.36[mm 2 ], and Ab=78.15[mm 2 ]. 
     When angles between each of the tapered surfaces  4312  ( 4312   a ,  4312   b , and  4312   c ) and the optical axis  410  are α 1  , α 2 , and α 3 , the following conditions are satisfied: α 1 =3[deg.]; α 2 =60[deg.]; and α 3 =42[deg.]. 
     8th Embodiment 
     Please refer to  FIG.  31   , which is a partial and cross-sectional view of an electronic device and an image sensor thereof with a circuit board and a substrate according to the 8th embodiment of the present disclosure. Note that only the differences between this and the previous embodiment are illustrated hereinafter. 
     In this embodiment, an electronic device  4  includes the imaging lens module  40  disclosed in the 7th embodiment and a display module  49 . The display module  49  is located on an object side of the imaging lens module  40 . Specifically, the display module  49  includes a protective plate  49   a  and a display panel  49   b , and the protective plate  49   a  is located on an object side of the display panel  49   b  and the object side of the imaging lens module  40 . The plastic lens barrel  43  of the imaging lens module  40  further includes a step surface  439  disposed opposite to the bottom surface  4322 , and the step surface  439  is located between the top surface  4321  and the bottom surface  4322 . The display panel  49   b  of the display module  49  abuts on the top surface  4321  of the plastic lens barrel  43 , and the optical aperture  430  is located in the gap range of the display panel  49   b  and are exposed by the protective plate  49   a.    
     9th Embodiment 
     Please refer to  FIG.  32    to  FIG.  36   , where  FIG.  32    is a cross-sectional view of an imaging lens module and an image sensor thereof with a circuit board and a substrate according to the 9th embodiment of the present disclosure,  FIG.  33    is a cross-sectional view of a plastic lens barrel of the imaging lens module in  FIG.  32   ,  FIG.  34    is a top view of the plastic lens barrel of the imaging lens module in  FIG.  32   ,  FIG.  35    is a bottom view of the plastic lens barrel of the imaging lens module in  FIG.  32   , and  FIG.  36    is a front view of the image sensor of the imaging lens module with the circuit board and the substrate in  FIG.  32   . 
     In this embodiment, an imaging lens module  50  is configured to be disposed on a substrate  57 , wherein there is a circuit board  56  fixedly disposed on the substrate  57  by abutting thereon. The imaging lens module  50  includes an imaging lens assembly  51 , an image sensor  52 , and a plastic lens barrel  53 . The imaging lens assembly  51  has an optical axis  510  and an image surface  519  and includes a plurality of optical elements  511 , wherein the optical elements  511  include an aperture stop  511   a  and further include other type of elements such as a lens element, a light-blocking element, a stop, a spacer, and a retainer, and the present disclosure is not limited thereto. The optical axis  510  passes through the optical elements  511  and the image surface  519 , and the aperture stop  511   a  surrounds the optical axis  510 . The image sensor  52  is disposed on an image side of the imaging lens assembly  51 , and the image sensor  52  has an image sensing surface  520  facing towards the imaging lens assembly  51 . Specifically, the image sensing surface  520  is disposed on the image surface  519  of the imaging lens assembly  51 , and the optical axis  510  passes through the image sensing surface  520 . The image sensor  52  is electrically connected to the circuit board  56  so as to collaborate with the circuit board  56  and the substrate  57 . The plastic lens barrel  53  accommodates the imaging lens assembly  51  and the image sensor  52 . That is, both of the imaging lens assembly  51  and the image sensor  52  are disposed in the plastic lens barrel  53 . The plastic lens barrel  53  is made of black plastic material and is a non-axisymmetric lens barrel (shown in  FIG.  34    and  FIG.  35   ) manufactured in one piece by injection molding, wherein the optical axis  510  does not pass through the geometric center of the plastic lens barrel  53 . 
     The plastic lens barrel  53  includes an object-end portion  531 , a bottom portion  532 , a first inner hole portion  533 , a second inner hole portion  534 , and three gate traces  535 . The bottom portion  532  is located on an image side of the object-end portion  531 , the second inner hole portion  534  is located on an image side of the first inner hole portion  533 , and the gate traces  535  are disposed on one side of the bottom portion  532  located away from the optical axis  510 . 
     The object-end portion  531  has an object-end surface  5311  and a tapered surface  5312 . The tapered surface  5312  is located on an image side of the object-end surface  5311 . The object-end surface  5311  faces towards an object side direction of the imaging lens assembly  51 . The tapered surface  5312  is tapered off towards the object-end surface  5311 . The bottom portion  532  has a top surface  5321  and a bottom surface  5322 . The bottom surface  5322  is located on an image side of the top surface  5321 . Specifically, the bottom surface  5322  is substantially rectangular (shown in  FIG.  35   ) and is located at a position of the bottom portion  532  farthest away from the object-end portion  531 . The top surface  5321  and the bottom surface  5322  are disposed opposite to each other, and the image sensing surface  520  is located between the top surface  5321  and the bottom surface  5322 . The bore of the first inner hole portion  533  is substantially circular (shown in 
       FIG.  34   ). The imaging lens assembly  51  is disposed in the first inner hole portion  533 . Specifically, the first inner hole portion  533  has four inner parallel annular surfaces  5331 . The four inner parallel annular surfaces  5331  are disposed in parallel with the optical axis  510 , and the four inner parallel annular surfaces  5331  are respectively in physical contact with at least four of the optical elements  511  of the imaging lens assembly  51 . 
     The bore of the second inner hole portion  534  is substantially rectangular (shown in  FIG.  35   ). The second inner hole portion  534  includes an optical aligning structure  5341 . A relative position between the image sensing surface  520  and the imaging lens assembly  51  is aligned by the optical aligning structure  5341 . Specifically, the optical aligning structure  5341  has an inner bevel surface  5341   a  and an inner flat surface  5341   b , wherein the inner flat surface  5341   b  extends in a direction perpendicular to the optical axis  510  and the inner flat surface  5341   b  and the inner bevel surface  5341   a  are angled to each other. The image sensor  52  is axially aligned with the optical aligning structure  5341  through the slope of the inner bevel surface  5341   a  and the substrate  57  abutted on each other. The axial position of the image sensor  52  (e.g., the relative position between the image sensing surface  520  and the imaging lens assembly  51  in a direction in parallel with the optical axis  510 ) is maintained through the inner flat surface  5341   b  and the substrate  57  abutted on each other. Accordingly, the image sensor  52  is aligned with the image surface  519  of the imaging lens assembly  51 , and the optical axis  510  is perpendicular to the image sensing surface  520  in a non-skew manner. In addition, the optical axis  510  is aligned with the geometric center of the image sensing surface  520  by the aforementioned axial alignment. 
     When minimum distances between each of the gate traces  535  ( 535   a ,  535   b , and  535   c ) and the optical axis  510  are respectively dg 1 , dg 2 , and dg 3 , the following conditions are satisfied: dg 1 =3.15[mm]; and dg 2 =dg 3 =3.55[mm]. When an average value of the minimum distances dg 1 , dg 2 , and dg 3  is dg_avg=(Σdgi)/3, wherein i=1, 2, and 3, the following condition is satisfied: dg_avg=3.42[mm]. When a standard deviation of the minimum distances dg 1 , dg 2 , and dg 3  between each of the gate traces  535  and the optical axis  510  is dg_std=√{[Σ(dgi−dg_avg) 2 ]/3}, wherein i=1, 2, and 3, the following condition is satisfied: dg_std=0.189[mm]. When an aperture diameter of the aperture stop  511   a  of the imaging lens module  50  is ϕs, the following condition is satisfied: ϕs=0.48[mm]. 
     When a length of the second inner hole portion  534  in the direction in parallel with the optical axis  510  is Lr, the following condition is satisfied: Lr=0.945[mm]. 
     When an area surrounded by the object-end surface  5311  is Af, and an area surrounded by the bottom portion  532  is Ab, the following condition is satisfied: Af/Ab=0.27, wherein Af=12.42[mm 2 ], and Ab=46.30[mm 2 ]. 
     When an angle between the tapered surface  5312  and the optical axis  510  is α, the following conditions are satisfied: α=7[deg.]. 
     10th Embodiment 
     Please refer to  FIG.  37   , which is a partial and cross-sectional view of an electronic device and an image sensor thereof with a circuit board and a substrate according to the 10th embodiment of the present disclosure. Note that only the differences between this and the previous embodiment are illustrated hereinafter. 
     In this embodiment, an electronic device  5  includes the imaging lens module  50  disclosed in the 9th embodiment and a display module  59 . The display module  59  is located on an object side of the imaging lens module  50 . Specifically, the display module  59  includes a touch panel  59   a  and a display panel  59   b , and the touch panel  59   a  is located on an object side of the display panel  59   b  and the object side of the imaging lens module  50 . The display panel  59   b  of the display module  59  indirectly abuts on the top surface  5321  of the plastic lens barrel  53  through a spacer (not shown), and the imaging lens module  50  is not exposed by the display module  59 . 
     11th Embodiment 
     Please refer to  FIG.  38    to  FIG.  49   , where  FIG.  38    is a perspective view of a partially sectioned imaging lens module and an image sensor thereof with a circuit board and a substrate according to the 11th embodiment of the present disclosure,  FIG.  39    is a side view of the partially sectioned imaging lens module and the image sensor thereof with the circuit board and the substrate viewing from a DD direction in  FIG.  38   ,  FIG.  40    is a side view of the partially sectioned imaging lens module and the image sensor thereof with the circuit board and the substrate viewing from an EE direction in  FIG.  38   ,  FIG.  41    is a side view of the partially sectioned imaging lens module and the image sensor thereof with the circuit board and the substrate viewing from an FF direction in  FIG.  38   ,  FIG.  42    is an exploded view of the imaging lens module and the image sensor thereof with the circuit board and the substrate in  FIG.  38   ,  FIG.  43    is a cross-sectional view of the imaging lens module and the image sensor thereof with the circuit board and the substrate in  FIG.  42   ,  FIG.  44    is a cross-sectional view of a plastic lens barrel of the imaging lens module in  FIG.  43   ,  FIG.  45    is a perspective view of the plastic lens barrel of the imaging lens module in  FIG.  43   ,  FIG.  46    is a top view of the plastic lens barrel of the imaging lens module in  FIG.  43   ,  FIG.  47    is another perspective view of the plastic lens barrel of the imaging lens module in  FIG.  43   ,  FIG.  48    is a bottom view of the plastic lens barrel of the imaging lens module in  FIG.  43   , and  FIG.  49    is a front view of the image sensor of the imaging lens module with the circuit board and the substrate in  FIG.  42   . 
     In this embodiment, an imaging lens module  60  is configured to be disposed on a substrate  67 , wherein there is a circuit board  66  fixedly disposed on the substrate  67  by abutting thereon. The imaging lens module  60  includes an imaging lens assembly  61 , an image sensor  62 , and a plastic lens barrel  63 . The imaging lens assembly  61  has an optical axis  610  and an image surface  619  and includes a plurality of optical elements  611 , wherein the optical elements  611  include an aperture stop  611   a  and further include other types of elements such as a lens element, a light-blocking element, a stop, a spacer, and a retainer, and the present disclosure is not limited thereto. The optical axis  610  passes through the optical elements  611  and the image surface  619 , and the aperture stop  611   a  surrounds the optical axis  610 . The image sensor  62  is disposed on an image side of the imaging lens assembly  61 , and the image sensor  62  has an image sensing surface  620  facing towards the imaging lens assembly  61 . Specifically, the image sensing surface  620  is disposed on the image surface  619  of the imaging lens assembly  61 , and the optical axis  610  passes through the image sensing surface  620 . The image sensor  62  is electrically connected to the circuit board  66  so as to collaborate with the circuit board  66  and the substrate  67 . The plastic lens barrel  63  accommodates the imaging lens assembly  61  and the image sensor  62 . That is, both of the imaging lens assembly  61  and the image sensor  62  are disposed in the plastic lens barrel  63 . The plastic lens barrel  63  is made of black plastic material and is a non-axisymmetric lens barrel (shown in  FIG.  46    and  FIG.  48   ) manufactured in one piece by injection molding, wherein the optical axis  610  does not pass through the geometric center of the plastic lens barrel  63 . 
     The plastic lens barrel  63  includes an object-end portion  631 , a bottom portion  632 , a first inner hole portion  633 , a second inner hole portion  634 , and five gate traces  635 . The bottom portion  632  is located on an image side of the object-end portion  631 , the second inner hole portion  634  is located on an image side of the first inner hole portion  633 , and the gate traces  635  are disposed on one side of the bottom portion  632  located away from the optical axis  610 . 
     The object-end portion  631  has an object-end surface  6311  and a tapered surface  6312 . The tapered surface  6312  is located on an image side of the object-end surface  6311 . The object-end surface  6311  faces towards an object side direction of the imaging lens assembly  61 . The tapered surface  6312  is tapered off towards the object-end surface  6311 . The bottom portion  632  has a top surface  6321  and a bottom surface  6322 . The bottom surface  6322  is located on an image side of the top surface  6321 . Specifically, the bottom surface  6322  is substantially rectangular (shown in  FIG.  47    and  FIG.  48   ) and is located at a position of the bottom portion  632  farthest away from the object-end portion  631 . The top surface  6321  and the bottom surface  6322  are disposed opposite to each other, and the image sensing surface  620  is located between the top surface  6321  and the bottom surface  6322 . 
     The bore of the first inner hole portion  633  is substantially circular (shown in  FIG.  45    and  FIG.  46   ). The imaging lens assembly  61  is disposed in the first inner hole portion  633 . Specifically, the first inner hole portion  633  has four inner parallel annular surfaces  6331 . The four inner parallel annular surfaces  6331  are disposed in parallel with the optical axis  610 , and the four inner parallel annular surfaces  6331  are respectively in physical contact with at least four of the optical elements  611  of the imaging lens assembly  61 . 
     The bore of the second inner hole portion  634  is substantially rectangular (shown in  FIG.  47    and  FIG.  48   ). The second inner hole portion  634  includes an optical aligning structure  6341 . A relative position between the image sensing surface  620  and the imaging lens assembly  61  is aligned by the optical aligning structure  6341 . Specifically, the optical aligning structure  6341  has an inner bevel surface  6341   a  and an inner flat surface  6341   b , wherein the inner flat surface  6341   b  extends in a direction perpendicular to the optical axis  610  and the inner flat surface  6341   b  and the inner bevel surface  6341   a  are angled to each other. The image sensor  62  is axially aligned with the optical aligning structure  6341  through the slope of the inner bevel surface  6341   a  and the substrate  67  abutted on each other. The axial position of the image sensor  62  (e.g., the relative position between the image sensing surface  620  and the imaging lens assembly  61  in a direction in parallel with the optical axis  610 ) is maintained through the inner flat surface  6341   b  and the substrate  67  abutted on each other. Accordingly, the image sensor  62  is aligned with the image surface  619  of the imaging lens assembly  61 , and the optical axis  610  is perpendicular to the image sensing surface  620  in a non-skew manner. In addition, the optical axis  610  is aligned with the geometric center of the image sensing surface  620  by the aforementioned axial alignment. 
     When minimum distances between each of the gate traces  635  ( 635   a ,  635   b ,  635   c ,  635   d , and  635   e ) and the optical axis  610  are respectively dg 1 , dg 2 , dg 3 , dg 4 , and dg 5 , the following conditions are satisfied: dg 1 =dg 2 =3.45[mm]; dg 3 =dg 4 =3.74[mm]; and dg 5 =4.34[mm]. When an average value of the minimum distances dg 1 , dg 2 , dg 3 , dg 4 , and dg 5  is dg_avg=(Σdgi)/5, wherein i=1, 2, 3, 4, and 5, the following condition is satisfied: dg_avg=3.74[mm]. When a standard deviation of the minimum distances dg 1 , dg 2 , dg 3 , dg 4 , and dg 5  between each of the gate traces  635  and the optical axis  610  is dg_std=√{[Σ(dgi−dg_avg) 2 ]/5}, wherein i=1, 2, 3, 4, and 5, the following condition is satisfied: dg_std=0.325[mm]. When an aperture diameter of the aperture stop  611   a  of the imaging lens module  60  is ϕs, the following condition is satisfied: ϕs=0.48[mm]. 
     When a length of the second inner hole portion  634  in the direction in parallel with the optical axis  610  is Lr, the following condition is satisfied: Lr=0.945[mm]. 
     When an area surrounded by the object-end surface  6311  is Af, and an area surrounded by the bottom portion  632  is Ab, the following condition is satisfied: Af/Ab=0.27, wherein Af=12.42[mm 2 ], and Ab=45.95[mm 2 ]. 
     When an angle between the tapered surface  6312  and the optical axis  610  is α, the following conditions are satisfied: α=7[deg.]. 
     12th Embodiment 
     Please refer to  FIG.  50   , which is a partial and cross-sectional view of an electronic device and an image sensor thereof with a circuit board and a substrate according to the 12th embodiment of the present disclosure. Note that only the differences between this and the previous embodiment are illustrated hereinafter. 
     In this embodiment, an electronic device  6  includes the imaging lens module  60  disclosed in the 11th embodiment and a display module  69 . The display module  69  is located on an object side of the imaging lens module  60 . Specifically, the display module  69  includes a touch panel  59   a  and a display panel  69   b , and the touch panel  59   a  is located on an object side of the display panel  69   b  and the object side of the imaging lens module  60 . The display panel  69   b  of the display module  69  indirectly abuts on the top surface  6321  of the plastic lens barrel  63  through a spacer (not shown), and the imaging lens module  60  is not exposed by the display module  69 . 
     13th Embodiment 
     Please refer to  FIG.  51   , which is a perspective view of an electronic device according to the 13th embodiment of the present disclosure. In this embodiment, an electronic device  7  is a smartphone including the imaging lens module  10  disclosed in the 1st embodiment and a display device  71 ; the electronic device  7  may include the imaging lens module disclosed in other embodiments, and the present disclosure is not limited thereto. In this embodiment, the imaging lens module  10  and the display device  71  are disposed on the same side of the electronic device  7 . That is, the imaging lens module  10  can be a front-facing camera of the electronic device  7  for taking selfies, but the present disclosure is not limited thereto. The display device  71  includes the display module  19  disclosed in the 2nd embodiment, and the display module  19  is located on the object side of the imaging lens module  10 . In addition, the electronic device  7  may also include the imaging lens module disclosed in other embodiments as a rear camera on the opposite side thereof (not shown), and the present disclosure is not limited thereto. 
     14th Embodiment 
     Please refer to  FIG.  52   , which is a perspective view of the electronic device according to the 14th embodiment of the present disclosure. In this embodiment, an electronic device  8  is a smartphone including the imaging lens module  60  disclosed in the 11th embodiment and a display device  81 ; the electronic device  8  may include the imaging lens module disclosed in other embodiments, and the present disclosure is not limited thereto. In this embodiment, the imaging lens module  60  and the display device  81  are disposed on the same side of the electronic device  8 . That is, the imaging lens module  60  can be an under-screen and front-facing camera of the electronic device  8  for taking selfies, but the present disclosure is not limited thereto. The display device  81  includes the display module  69  disclosed in the 12th embodiment, and the display module  69  is located on the object side of the imaging lens module  60  which is not exposed by the display module  69 . In addition, the electronic device  8  may also include the imaging lens module disclosed in other embodiments as a rear camera on the opposite side thereof (not shown), and the present disclosure is not limited thereto. 
     The smartphones in these embodiments are only exemplary for showing the imaging lens modules  10 - 60  of the present disclosure installed in electronic devices  7 - 8 , and the present disclosure is not limited thereto. The imaging lens modules  10 - 60  can be optionally applied to optical systems with a movable focus. Furthermore, the imaging lens modules  10 - 60  features good capability in aberration corrections and high image quality, and can be applied to 3D (three-dimensional) image capturing applications, in products such as digital cameras, mobile devices, digital tablets, smart televisions, network surveillance devices, dashboard cameras, vehicle backup cameras, multi-camera devices, image recognition systems, motion sensing input devices, wearable devices and other electronic imaging devices. 
     The foregoing description, for the purpose of explanation, has been described with reference to specific embodiments. It is to be noted that the present disclosure shows different data of the different embodiments; however, the data of the different embodiments are obtained from experiments. The embodiments were chosen and described in order to best explain the principles of the disclosure and its practical applications, to thereby enable others skilled in the art to best utilize the disclosure and various embodiments with various modifications as are suited to the particular use contemplated. The embodiments depicted above and the appended drawings are exemplary and are not intended to be exhaustive or to limit the scope of the present disclosure to the precise forms disclosed. Many modifications and variations are possible in view of the above teachings.