RU2793143C2 - Light scanning module and electronic imaging device - Google Patents

Abstract

FIELD: imaging.

SUBSTANCE: light scanning module. The light source includes at least two light emitting points, with at least two light emitting points distributed along a straight line; the angle between the extension direction of their distribution line and the main scanning direction or the secondary scanning direction of the light scanning device includes an acute angle, wherein the main scanning direction is perpendicular to the secondary scanning direction. At least two light emitting points in the light source are distributed along a straight line, and the angle between the extension direction of the distribution line and the main scanning direction or the secondary scanning direction of the optical scanning device includes an acute angle, so that the distance between the light spots formed by the light beams emitted of at least two light emitting points incident on the scanned surface along the main scanning direction is enlarged.

EFFECT: avoidance of the occurrence of interference between light spots and improvement of image quality.

9 cl, 6 dwg, 3 tbl

Description

[001] This application is a National Phase International Application No. PCT/CN2019/125575, filed December 16, 2019, which claims priority over Chinese Patent Application No. 201811643322.2, filed with the China National Intellectual Property Office on December 29, 2018, all the contents of which are incorporated into this application by reference.

FIELD OF TECHNOLOGY TO WHICH THE INVENTION RELATES

[002] The present disclosure generally relates to the technical field of imaging and, in particular, relates to a light scanning module and an electronic imaging device.

BACKGROUND OF THE INVENTION

[003] Electronic imaging devices such as laser printers, copiers, printers, and the like are devices for forming images on a recording medium such as paper. In order to meet the market demand for the printing efficiency of electronic imaging devices, it has become a trend to develop high-speed electronic imaging devices.

[004] The electronic imaging device may include a light scanning module. The light scanning unit may be configured to emit a light beam carrying image information to the photoreceptor, so that the photoreceptor can receive and process image information carried in the light beam. Figure 1 shows a planar structural diagram of the light source of the light scanning module in the existing technology. As shown in Fig. 1, in order to increase the emission power of light output from the light scanning unit, a plurality of light emitting dots can be arranged along the secondary scanning print direction in the same light source of the light scanning unit in the existing technology, and the normal operation of the light scanning unit can be achieved by independently controlling each light emitting point.

[005] Figure 2 shows a diagram of the formation of an image of a light scanning module on a scanned surface in the existing technology. As shown in FIG. 2, when the light source structure of the light scanning unit shown in FIG. 1 is used, two adjacent light spots of the light scanning unit on the scanned surface may interfere with each other. Therefore, the accuracy of the image information acquired by the photoreceptor may be affected, which may lead to a problem of low quality of the image presented by the electronic imaging apparatus.

DISCLOSURE OF THE INVENTION

[006] To eliminate the interference between light spots formed by light beams emitted from a plurality of light emitting points of the light scanning unit incident on the scanned surface, which affect the accuracy of the image information obtained by the photoreceptor and other results in the low image quality problem presented an electronic imaging device, the present disclosure relates to a light scanning unit and an electronic imaging device.

[007] One aspect of the present disclosure relates to a light scanning module including a light source, a first optical module, an optical deflector, and a second optical module, wherein:

[008] the light source includes at least two light emitting points for diverging light beams; wherein at least two light emitting dots are distributed along a straight line; and the angle between the extension direction of their distribution line and the main scanning direction or the secondary scanning direction of the light scanning device includes an acute angle, wherein the main scanning direction is perpendicular to the secondary scanning direction;

[009] the first optical module is configured to collimate at least two light beams emitted from the light source along the main scanning direction and focus the light beams along the secondary scanning direction;

[0010] the optical deflector is configured to deflect and scan at least two light beams emitted from the first optical module as the optical deflector rotates; And

[0011] the second optical module is configured to form, by means of at least two light beams deflected and scanned by the optical deflector, an image on the scanned surface; moreover, the following relation is fulfilled: (βs/βm) ² >0.6, where:

[0012] βm denotes the magnification of the optical system of the light scanning module along the main scanning direction; And

[0013] βs denotes the magnification of the optical system of the light scanning module along the secondary scanning direction.

[0014] In an optional implementation, the increase in βm of the optical system of the light scanning module along the primary scanning direction and the increase in βs of the optical system of the light scanning module along the secondary scanning direction also satisfy the following relationship:

[0015] βs/βm > 0.77.

[0016] In an optional implementation, the increase in βm of the optical system of the light scanning module along the primary scanning direction and the increase in βs of the optical system of the light scanning module along the secondary scanning direction also satisfy the following relationship:

[0017] 0.77<βs/βm<1.67; or 0.6 <(βs/βm)²<2.8.

[0018] In an optional implementation, the light scanning module further includes: a diaphragm module and

[0019] The diaphragm is configured to generate light beams emitted from the light source.

[0020] In an optional implementation, the light scanning module further includes: a timing signal detection module for receiving light beams deflected from the optical deflector, and

[0021] the synchronization signal detection module is configured to detect and obtain the synchronization signal; and the timing signal is configured to determine the initial position of the light scanning module when forming an image on the scanned surface.

[0022] In an optional implementation, βm is 6.25 and βs is 5.037.

[0023] In an optional implementation, the optical deflector includes a multifaceted main body; and the surface of the multifaceted main body forms a plurality of reflective mirror surfaces; And

[0024] The polyhedral main body is rotatable along the rotating axis, and the central axis of the rotating axis is parallel to the secondary scanning direction.

[0025] In an optional implementation, the second optical module is an F-θ lens.

[0026] Another aspect of the present disclosure relates to an electronic imaging device including the disclosed light scanning module and a photoreceptor, wherein:

[0027] the light scanning module and the photoreceptor are co-located, and the light beams emitted from the light scanning module are focused to form an image on the photoreceptor surface of the photoreceptor; And

[0028] the photoreceptor is a photosensitive drum and the photoreceptor surface is a scanned surface; and the electronic imaging device further includes a charging roller, a developing module, a cleaning module, a transfer roller, and a fixing module, where:

[0029] the charging roller is rotatable and in contact with the photosensitive drum so that the focused image on the scanned surface of the photosensitive drum is charged to form an electrostatic latent image;

[0030] the developing unit and the photosensitive drum are co-located such that the electrostatic latent image on the photosensitive drum absorbs the developing material in the developing unit to form a developed image;

[0031] the transfer roller abuts against the photosensitive drum for transferring the developed image on the photosensitive drum to the recording medium between the transfer roller and the photosensitive drum for the fixing unit to perform fixation processing on the developed image transferred to the recording medium; And

[0032] The cleaning module is configured to remove developing material remaining on the photosensitive drum after the developed image has been transmitted.

[0033] The present disclosure relates to a light scanning module and an electronic imaging apparatus including a scanning module. The light scanning module may be arranged with a light source, a first optical module, an optical deflector, and a second optical module. The light source may include at least two light emitting points; moreover, at least two light emitting points can be distributed along a straight line; and the angle between the extension direction of the distribution line of the at least two light emitting points and the main scanning direction or the secondary scanning direction of the light scanning device may include an acute angle where the main scanning direction is perpendicular to the secondary scanning direction. The first optical module may be configured to collimate the light beams emitted from the light source along the main scanning direction and focus the light beams along the secondary scanning direction. The optical deflector may be configured to deflect light beams emitted from the first optical module as the optical deflector rotates, so that the deflected light beams can form images on a pre-positioned scanned surface under the effect of focusing the second optical module. At least two light emitting points in the light source are distributed along a straight line, and the angle between the extension direction of the distribution line and the main scanning direction or the secondary scanning direction of the optical scanning device includes an acute angle, because the distance between the light spots formed by the light rays, emitted from at least two light emitting points incident on the scanned surface along the main scanning direction can be increased, which avoids the occurrence of interference phenomenon and improves image quality.

BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings herein may be incorporated into the description and form part of the present description, illustrate embodiments consistent with the present disclosure, and are used in conjunction with the description to describe the principle of the present disclosure.

[0035] Figure 1 illustrates a planar block diagram of a light source of a light scanning module in the existing technology;

[0036] FIG. 2 illustrates a scheme for imaging a light scanning module on a scanned surface in existing technology;

[0037] Figure 3 illustrates a block diagram of a light scanning module according to various embodiments of the present disclosure;

[0038] Figure 4 illustrates a planar block diagram of a light source of a light scanning module according to various embodiments of the present disclosure;

[0039] FIG. 5 illustrates a scheme for imaging a light scanning module on a scanned surface according to various embodiments of the present disclosure; And

[0040] FIG. 6 illustrates a block diagram of an electronic imaging apparatus according to various embodiments of the present disclosure.

[0041] Specific embodiments of the present disclosure may be illustrated using the above drawings, which may be described in more detail below. These drawings and textual descriptions are not intended to limit the conceptual scope of the present disclosure in any way, but serve to explain the concept of the present disclosure to those skilled in the art by referring to specific embodiments.

IMPLEMENTATION OF THE INVENTION

[0042] In order to more clearly illustrate the objectives, technical solutions and advantages of the various embodiments of the present disclosure, the technical solutions in the various embodiments of the present disclosure may be described clearly and exhaustively in conjunction with the accompanying drawings in the various embodiments of the present disclosure.

[0043] Electronic imaging devices such as laser printers, copiers, printers, and the like are devices for forming images on a recording medium such as paper. In order to meet the market demand for the printing efficiency of electronic imaging devices, it has become a trend to develop high-speed electronic imaging devices.

[0044] The electronic imaging device may include a light scanning module. The light scanning unit may be configured to emit a light beam carrying image information to the photoreceptor, so that the photoreceptor can receive and process image information carried in the light beam. Figure 1 shows a planar structural diagram of the light source of the light scanning module in the existing technology. As shown in FIG. 1, in order to increase the emission power of the light output from the light scanning unit, a plurality of light emitting dots 111' can be arranged along the secondary scanning print direction in the same light source 11' of the light scanning unit in the existing technology, and normal operation of the light scanning module can be achieved by independently controlling each light emitting dot 111'.

[0045] Figure 2 shows a diagram of the formation of an image of a light scanning module on a scanned surface in the existing technology. As shown in FIG. 2, typically the size of the light spot 112' formed on the scanned surface of the light beam emitted from the two light emitting dots 111' may be about 70 microns. When the print resolution is 600 dpi, the central distance Ls of the imaging light spots 112' of the two light emitting dots 111' along the secondary scanning direction Y may be about 42.3 microns. Since the imaging light spots 112' of the two light emitting dots 111' are arranged along a direction parallel to the secondary Y scanning direction, the two imaging light spots 112' may interfere with each other along the secondary Y scanning direction. Therefore, the accuracy of the image information acquired by the photoreceptor may be affected, which may further lead to the problem of low quality of the image presented by the electronic imaging apparatus.

[0046] It should be noted that exemplary embodiments may be described in detail herein, and examples thereof may be shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings may indicate the same or similar elements. The implementations described in the following exemplary embodiments may not represent all implementations consistent with the present disclosure. Rather, such implementations may simply be examples of devices and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0047] The technical solutions of the present disclosure and how the technical solutions of the present application solve the above technical problems can be described in detail below with specific embodiments. The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. Various embodiments of the present disclosure may be described below in conjunction with the accompanying drawings.

[0048] Figure 3 illustrates a block diagram of a light scanning module according to various embodiments of the present disclosure; and FIG. 4 illustrates a planar block diagram of a light source of a light scanning module according to various embodiments of the present disclosure.

[0049] As shown in FIG. 3, the light scanning module may include a light source 11, a first optical module 12, an optical deflector 13, and a second optical module 14.

[0050] The light source 11 may include at least two light emitting dots 111 for divergent light beams; moreover, at least two light emitting points 111 can be distributed along a straight line; and the angle between the extension direction of the distribution line of the at least two light emitting points and the main scanning direction or the secondary scanning direction of the light scanning device may include an acute angle where the main scanning direction may be perpendicular to the secondary scanning direction.

[0051] The first optical module 12 may be configured to collimate at least two light beams emitted from the light source 11 along the main scanning direction and focus at least two light beams emitted from the light source 11 along the secondary scanning direction.

[0052] The optical deflector 13 may be configured to deflect and scan at least two light beams emitted from the first optical module as the optical deflector 13 is rotated, so that the at least two deflected light beams may form at least two light spots. 112 forming an image on a predetermined scanned surface 15 under the action of focusing the second optical module 14, where by rotating the optical deflector 13, each imaging spot 112 can form a scan line; and at the same scanning time, at least two light emitting dots 111 can be distributed along a straight line; and the angle between the extension direction of the distribution line of the at least two light emitting dots 111 and the main scanning direction or the secondary scanning direction of the light scanning device may include an acute angle.

[0053] In particular, the light scanning module provided in one embodiment may be used in electronic imaging devices such as laser printers, copiers, printers, and the like. In one embodiment, the light source 11, the first optical module 12 , the optical deflector 13 and the second optical module 14 may be arranged in series.

[0054] Taking the structure shown in Fig. 4 as an example, the difference from the existing technology may be that the light source 11 in one embodiment may include two light emitting dots 111; wherein the two light emitting dots 111 may be distributed along a straight line; and the angle between the extension direction of the distribution line of the two light emitting points 111 and the secondary scanning direction Y may be an acute angle θ.

[0055] Each light emitting dot 111 shown in FIG. 3 can emit a light beam carrying image information under the independent control of a control unit (not shown in FIG. 3), and the emitted light beam can be transmitted to the first optical module 12. Under the action of the first optical module 12, the beam can be collimated along the main X-scan direction and focused along the secondary Y-scan direction. That is, the beam of light emitted from the first optical module 12 may be parallel light along the main scanning direction X and converging light along the secondary scanning direction Y; and the light beam may be transmitted to the optical deflector 13. Optionally, the first optical module 12 may be an anamorphic lens or a cylindrical collimating lens, which may be made of a plastic material.

[0056] The optical deflector 13 may include a multifaceted main body structure; a plurality of reflective mirror surfaces can be formed on the surface of the polyhedral main body; meanwhile, the polyhedral main body can rotate at a predetermined speed along the rotating axis, and the central axis of the rotating axis can be parallel to the secondary scanning direction Y of the scanned surface 15. That is, the aforementioned light beam, which is parallel light along the main scanning direction X and converging light along the secondary scanning direction Y, can be transmitted to the reflective mirror surface of the optical deflector 13, and can be deflected by rotating the optical deflector 13, thereby forming a deflected light beam that deflects in a predetermined direction of the scanned surface 15. Subsequently, the deflected light beam can be focused by the second optical module 14 and form an imaging spot 112 on the pre-installed scanning surface 15, where the focusing action of the second optical module 14 can act simultaneously on the main scanning direction X and the secondary scanning direction Y of the light beam. Optionally, the second optical module 14 may be an F-θ lens, such as a single F-θ lens or a plurality of F-θ lenses, which may be made of a plastic material or a glass material.

[0057] Therefore, under the action of the above optical devices, at least two imaging light spots 112, which are distributed along a straight line, can appear on the preset scanning surface 15 of the light scanning unit; and the angle between the extension direction of the distribution line of the at least two imaging light spots 112 and the main scanning direction or the secondary scanning direction of the optical scanning device may include an acute angle.

[0058] It should be noted that FIG. 5 illustrates a scheme for imaging a light scanning module on a scanned surface according to various embodiments of the present disclosure. As shown in Fig. 5, in the light scanning unit, compared with the existing technology, the light spot size of the light beam emitted from the two light emitting dots 111 can be about 70 microns; when the print resolution is 600 dpi, the light spot size of the light beam emitted by the two light emitting dots 111 may be about 70 microns; when the central distance Ls of the imaging light spots 112 of the two light emitting dots 111 is maintained at about 42.3 microns along the secondary scanning direction Y, since the center-to-center distance Lm of the two imaging light spots 112 is not 0 along the main scanning direction X, the probability of interference may be is greatly reduced, thereby effectively improving the accuracy of the image information acquired by the photoreceptor and further improving the image quality provided by the electronic imaging apparatus.

[0059] In other optional implementations, the light scanning module may further include a diaphragm module 16. The diaphragm module 16 may, in particular, be provided with a light transmission hole to limit the size of the light beam and shape the light beam emitted from the light source. In particular, the diaphragm module 16 may be located between the light source 11 and the first optical module 12 to limit the size of the light beam emitted from the light source 11, may also be located between the first optical module 12 and the optical deflector 13, and may also be located in another position of the light scanning module, which cannot be limited in the present disclosure.

[0060] In other optional implementations, the light scanning module may further include a timing signal detection module 17 that receives a light beam deflected from the optical deflector 13; the synchronization signal detection module 17 may be configured to detect and obtain the synchronization signal; and the timing signal can be configured to determine the initial position of the light scanning module when performing imaging on the scanned surface 15. The detection method performed by the timing signal detection module can be described by existing technology, which cannot be limited by the present disclosure. In addition, a third optical module 18 may also be disposed between the synchronization signal detection module 17 and the optical deflector 13 to further improve the detection accuracy of the synchronization signal. The third optical module 18 may collect deflected light beams. That is, the third optical module 18 can collect the light beam simultaneously along the main scanning direction X and the secondary scanning direction Y, so that the deflected converging beam can be focused on the detection surface of the aforementioned synchronization detection module 17 . Meanwhile, the material and morphology of the third optical module 18 cannot be limited in the present application.

[0061] To further describe the light scanning module provided in one embodiment, a variety of additional implementations may be proposed as shown below.

[0062] In order to further avoid interference phenomena on the scanned surface 15 and reduce the loss of light intensity, in one embodiment, the increase in βm of the optical system of the light scanning module along the main scanning direction and the increase in βs of the optical system of the light scanning module along the secondary scanning direction may satisfy the following relationship 1 or ratio 2:

[0063] [Ratio 1]

[0064] βs/βm>0.77; And

[0065] [Ratio 2]

[0066] (βs/βm) ² >0.6.

[0067] In addition, the increase in βm of the optical system of the light scanning unit along the main scanning direction and the increase in βs of the optical system of the light scanning unit along the secondary scanning direction can satisfy the following ratio 3 or ratio 4:

[0068] [Ratio 3]

[0069] 0.77<βs/βm<1.67; And

[0070] [Ratio 4]

[0071] 0.6<(βs/βm)²<2.8.

[0072] In particular, still taking into account the structure shown in Figs. 4-5 as an example, it is assumed that:

[0073] two light emitting points 111 are located on the light source 11, and the distance between the centers of the two light emitting points 111 is equal to L; the angle between the extension direction of the distribution line of the two light emitting points 111 and the secondary scanning direction Y of the light scanning device is θ; on the preset scanning surface 15, the distance between the two imaging light spots 112 along the main scanning direction X is Lm, and the distance along the secondary scanning direction Y is Ls; the increase in the optical system of the light scanning module along the main scanning direction is equal to βm; and the magnification of the optical system of the light scanning unit along the secondary scanning direction is βs.

[0074] Therefore, according to the optical imaging principle, it can be obtained that the increase in the light scanning unit along the main scanning direction X is βm=Lm/(L×sinθ), the increase in the light scanning unit along the secondary scanning direction Y is βs=Ls/( L×cosθ) and βs/βm=(Ls/Lm)×tanθ.

[0075] In one embodiment, when βs/βm>0.77 or (βs/βm)²>0.6, compared with the light beam emitted from the light emitting point 111, the light intensity loss ratio of the imaging light spot 112 may be less than 10%. Table 1 shows an example implementation.

Table 1

Optical Resolution 600dpi Distance L between centers of light emitting points 14 µm Reference wavelength λ 788 nm Ls 42.3 µm lm 70 µm θ 53.14°

[0076] Using the parameter structure shown in Table 1, βm is 6.25; βs is 5.037; βs/βm is 0.806, which is more than 0.77; (βs/βm)² is 0.65, which is more than 0.6. In addition, it has been measured that the light intensity loss ratio of the imaging light spot 112 can be less than 5%, and the image quality can be effectively improved.

[0077] Table 2 shows an example implementation.

table 2

Optical resolution 600 dpi Distance L between centers of light emitting points 14 µm Reference wavelength λ 788 nm Ls 42.3 µm lm 70 µm θ 60°

[0078] Using the parameter structure shown in Table 2, βm is 5.77; βs is 6.05; βs/βm is 1.05, which is more than 0.77; (βs/βm)² is 1.10, which is greater than 0.6. In addition, it has been measured that the light intensity loss ratio of the imaging light spot 112 can be less than 10%, and the image quality can be effectively improved.

[0079] Obviously, by comparing the parameter structure shown in Table 2 with the parameter structure shown in Table 1, as θ increases, the increase in βm along the main scanning direction and the increase in βs along the secondary scanning direction can be respectively changed, so that Lm can more easily meet the requirements of 70 microns or more, which can effectively improve image quality.

[0080] Table 3 shows an example implementation.

Table 3

Optical resolution 600 dpi Distance L between centers of light emitting points 14 µm Reference wavelength λ 788 nm Ls 42.3 µm lm 90 µm θ 60°

[0081] Using the parameter structure shown in Table 3, βm is 7.42; βs is 6.05; βs/βm is 0.814, which is more than 0.77; (βs/βm)² is equal to 0.663, which is more than 0.6. In addition, it has been measured that the light intensity loss ratio of the imaging light spot 112 can be less than 5%, and the image quality can be effectively improved.

[0082] Obviously, by comparing the parameter structure shown in Table 2 with the parameter structure shown in Table 1, as θ increases, the increase in βm along the main scanning direction and the increase in βs along the secondary scanning direction can be respectively changed, so that Lm can more easily meet the requirements of 70 microns or more, which can effectively improve image quality.

[0083] With reference to the parameter structures shown in Tables 1 to 3, the magnification factor between the increase in βs along the secondary scanning direction Y can be relatively small compared to the increase in βm along the main scanning direction X of the optical scanning unit 1. As a result, the allowable sensitivity along the secondary scanning direction Y can be reduced, thereby ensuring the optical and mechanical performance of the light scanning unit, reducing the loss ratio of the light intensity of the imaging light spot 112, and improving image quality.

[0084] A light scanning module according to the present disclosure may be arranged with a light source, a first optical module, an optical baffle, and a second optical module. The light source may include at least two light emitting points; moreover, at least two light emitting points can be distributed along a straight line; and the angle between the extension direction of the distribution line of the at least two light emitting points and the main scanning direction or the secondary scanning direction of the light scanning device may include an acute angle where the main scanning direction is perpendicular to the secondary scanning direction. The first optical module may be configured to collimate the light beam emitted from the light source along the main scanning direction and focus the light beam emitted from the light source along the secondary scanning direction. The optical deflector may be configured to deflect a light beam emitted from the first optical module as the optical deflector rotates, so that the deflected light beam can form an image on a pre-positioned scanned surface under the effect of focusing the second optical module. The at least two light emitting points in the light source are distributed along a straight line, and the angle between the extension direction of the distribution line and the main scanning direction and the secondary scanning direction of the optical scanning device includes an acute angle, so that the distance between the light spots formed by the light beams emitted at least two light emitting points on the scanned surface along the main scanning direction can be enlarged, which avoids the occurrence of interference phenomenon and improves image quality.

[0085] The present disclosure also relates to an electronic imaging apparatus including a light scanning module and a photoreceptor described in any of the above embodiments, wherein the light scanning module and the photoreceptor may be co-located and the light beams emitted from the light scanning module , can be focused to form images on the photoreceptor surface of the photoreceptor.

[0086] It should be noted that with the difference in the shape of the electronic imaging apparatus, the photoreceptor may have a different structure of the main body. For example, when the electronic imaging apparatus is a laser printer, the photoreceptor may be a photosensitive drum and the photoreceptor surface may be a photosensitive surface.

[0087] FIG. 6 illustrates a block diagram of an electronic imaging apparatus according to various embodiments of the present disclosure. As shown in FIG. 6, the electronic imaging apparatus may include: a light scanning module 1, a photosensitive drum 2, a charging roller 3, a developing module 4, a cleaning module 5, a transfer roller 6, and a fixing module 7.

[0088] The charging roller 3 can rotate and be in contact with the photosensitive drum 2 so that a focused image on the photosensitive surface of the photosensitive drum 2 can be charged to form an electrostatic latent image.

[0089] The developing unit 4 and the photosensitive drum 2 may be co-located so that the latent electrostatic image on the photosensitive drum 2 can absorb the developing material in the developing unit 4 to form a developed image.

[0090] The transfer roller 6 can abut against the photosensitive drum 2 to transfer the developed image on the photosensitive drum 2 to the recording medium 8 between the transfer roller 6 and the photosensitive drum 2 for the fixing module 7 to fix the developed image transferred to the recording medium 8.

[0091] The cleaning unit 5 may be configured to remove developing material remaining on the photosensitive drum 2 after the developed image has been transmitted.

[0092] Specifically, in order to print an image, the light beam emitted from the light scanning unit 1 may be scanned onto the photosensitive surface of the photosensitive drum 2, which has a cylindrical metal tube with an outer circumference and a photosensitive layer of a predetermined thickness formed on the outer circumference. . The charging roller 3 can rotate and be in contact with the photosensitive drum 2 to charge the surface of the photosensitive drum 2 to a uniform electric potential. The light scanning unit 1 may scan along the main scanning direction to adjust the light beam according to the image information, thereby forming an electrostatic latent image on the photosensitive surface. In such a case, when the photosensitive drum 2 rotates, the photosensitive surface can move along the secondary scanning direction, and the light scanning unit 1 can scan a light beam onto the photosensitive surface along the main scanning direction in synchronization with the horizontal synchronization signal. Therefore, a two-dimensional electrostatic latent image can be formed on the photosensitive surface of the photosensitive drum 2.

[0093] The developing unit 4 may be in contact with the photosensitive drum 2 and transfer the developing material to the surface of the photosensitive drum 2, thereby forming a developed image. When the photosensitive drum 2 rotates, the developed image on the photosensitive surface can be pressed onto the recording medium. The transfer roller 6 may have a certain tension, which facilitates the absorption of the developed image on the photosensitive surface onto the recording medium 8; and after transfer, the remaining developing material on the photosensitive surface can be removed by the cleaning unit 5. The developed image transferred to the recording medium 8 can be fixed on the recording medium 8 through a fixing process such as heating and pressing by the fixing unit 7, thereby completing the printing operation .

[0094] The electronic imaging device of the optical scanning module may be provided in various embodiments of the present disclosure. The optical scanning module may be arranged with the light source, the first optical module, the optical deflector, and the second optical module in the optical scanning module. The light source may include at least two light emitting points; moreover, at least two light emitting points can be distributed along a straight line; and the angle between the extension direction of the distribution line of the at least two light emitting points and the main scanning direction or the secondary scanning direction of the light scanning device may include an acute angle where the main scanning direction is perpendicular to the secondary scanning direction. The first optical module may be configured to collimate the light beam emitted from the light source along the main scanning direction and focus the light beam emitted from the light source along the secondary scanning direction. The optical deflector may be configured to deflect a light beam emitted from the first optical module as the optical deflector rotates, so that the deflected light beam can form an image on a pre-positioned scanned surface under the effect of focusing the second optical module. As a result, the distance between the light spots formed by the light beams emitted from at least two light-emitting points on the scanned surface along the main scanning direction can be increased, which avoids the occurrence of an interference phenomenon and improves the image quality.

[0095] Finally, it should be noted that the above embodiments may be used merely to illustrate, and not to limit, the technical solutions of the present disclosure. Although the present disclosure has been described in detail with reference to the above embodiments, those skilled in the art should understand that it is still possible to modify the technical solutions described in the above embodiments, or equivalently replace some or all of the technical features. In addition, these modifications or replacements cannot lead to a deviation of the essence of the respective technical solutions from the scope of technical solutions of various embodiments of the present disclosure.

Claims (33)

1. A light scanning module, comprising: a light source, a first optical module, an optical deflector and a second optical module, wherein: the light source includes at least two light emitting points for diverging light beams; wherein at least two light emitting dots are distributed along a straight line; and the angle between the extension direction of the distribution line of the at least two light emitting points and the main scanning direction or the secondary scanning direction of the light scanning unit includes an acute angle, wherein the main scanning direction is perpendicular to the secondary scanning direction; the first optical module is configured to collimate at least two light beams emitted from the light source along the main scanning direction and focus at least two light beams emitted from the light source along the secondary scanning direction; the optical deflector is configured to deflect at least two light beams emitted from the first optical module and bring the deflected at least two light beams to be scanned by rotating the optical deflector; And the second optical module is configured to form, by means of at least two light beams deflected and scanned by the optical deflector, an image on the scanned surface; and the following relation holds: (

s/

m) ² >0.6, where:

m denotes the magnification of the optical system of the light scanning module along the main scanning direction; And

s denotes the magnification of the optical system of the light scanning module along the secondary scanning direction. 2. The light scanning module of claim 1, wherein the magnification

m of the optical system of the light scanning module along the main scanning direction and magnification

s of the optical system of the light scanning module along the secondary scanning direction also satisfy the following relationship:

s/

m > 0.77. 3. The light scanning module of claim 2, wherein the magnification

m of the optical system of the light scanning module along the main scanning direction and magnification

s of the optical system of the light scanning module along the secondary scanning direction also satisfy the following relationship: 0.77<

s/

m<1.67; or 0.6<(

s/

m) ² <2.8. 4. The light scanning module of claim 1, further comprising: diaphragm module, in which: the diaphragm is configured to generate light beams emitted from the light source. 5. The light scanning module of claim 1, further comprising: synchronization signal detection module for receiving light beams deflected from the optical deflector, wherein: the synchronization signal detection module is configured to detect and obtain the synchronization signal; and the timing signal is configured to determine the initial position of the light scanning module when forming an image on the scanned surface. 6. The light scanning module according to claim 1, in which:

m is 6.25 and

s is 5.037. 7. The light scanning module according to claim 1, in which the optical deflector includes a multifaceted main body; and the surface of the multifaceted main body forms a plurality of reflective mirror surfaces; And the multifaceted main body is rotatable along the rotating axis, and the central axis of the rotating axis is parallel to the secondary scanning direction. 8. The light scanning module according to claim 1, in which: the second optical module is an F-lens

. 9. An electronic imaging device comprising a light scanning module according to claim 1 and a photoreceptor, wherein: the light scanning module and the photoreceptor are co-located, and the light beams emitted from the light scanning module are focused to form an image on the photoreceptor surface of the photoreceptor; And the photoreceptor is a photosensitive drum and the photoreceptor surface is a scanned surface; And the electronic imaging device further comprises a charging roller, a developing module, a cleaning module, a transfer roller, and a fixing module, wherein: the charge roller is rotatable and in contact with the photosensitive drum so that the focused image on the scanned surface of the photosensitive drum is charged to form an electrostatic latent image; the developing unit and the photosensitive drum are co-located so that the electrostatic latent image on the photosensitive drum absorbs the developing material in the developing unit to form a developed image; the transfer roller abuts against the photosensitive drum for transferring the developed image on the photosensitive drum to the recording medium between the transfer roller and the photosensitive drum for the fixing unit to perform fixation processing on the developed image transferred to the recording medium; And the cleaning module is configured to remove developing material remaining on the photosensitive drum after the developed image has been transmitted.

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