Abstract:
A method for generating diffuse reflection light and a diffuse reflection lamp are provided. The diffuse reflection lamp comprises a reflective plate ( 10 ), a connector ( 20 ) and a dragging device ( 40 ). The reflective plate ( 10 ) is removably fixed on the lamp by the connector ( 20 ) to reflect the light from the lamp. One end of the dragging device ( 40 ) is connected with the reflective plate ( 10 ), and the other end is connected with the connector ( 20 ); or the dragging device ( 40 ) hoops around the outer edge of the reflective plate ( 10 ). Therefore, the reflective plate ( 10 ) is elastically bended toward and formed into a curved arc surface to collect the diffuse reflection light.

Description:
PRIORITY CLAIM 
     This is a U.S. national stage of application No. PCT/CN2010/001506, filed on Sep. 28, 2010. Priority is claimed on the following application: Country: China, Application No.: 201020160627.0, Filed: Apr. 9, 2010, the content of which is/are incorporated here by reference. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to an illumination device, especially to a method and a device for generating diffuse reflection light. 
     2. Description of the Related Art 
     Light box, light reflection device, and soft light device are often needed in the process of photographing, and in particular in art photographing where the soft light effect is closely associated with the soft light area of the soft light device. The larger the soft light area is, the better the soft light effect is. The types of the soft light device in the prior art and their disadvantages are as follows: 
     1. Conventional light box, soft light box, soft light umbrella, and light reflecting umbrella: 
     The disadvantages include: the installation and the disassembly are quite troublesome; the use in the open air or under the situation of frequent movement is time-consuming and laborious; certain skill is especially required for installation of a soft light box; the entire device is heavy, difficult for handholding and very inconvenient in movement; therefore, conventional devices are suitable for indoor use and use at a fixed position; they are extremely inconvenient when being used in open air. 
     2. Conventional reflector, soft light device with external top light source: 
     The disadvantages include: small area of the light reflection and soft light material, and inferior soft light effect. Some portable soft light devices hinder the original function of original light source from effecting during the installation and use thereof. 
     3. Because the reflector of light box, and soft light and light reflection device in the prior art is fixed when being used and does not lead to area change, the equivalent luminescent area thereof cannot be adjusted. 
     SUMMARY OF THE INVENTION 
     The technical problem to be solved by the present invention is to avoid the above deficiencies in the prior art in order to achieve further improvement on the prior art, and provide a method for generating diffuse reflection light, which is characterized by convenient installation and disassembly, superior soft light effect, and adjustable equivalent luminescent area and primary illuminating direction of light, and a diffuse reflection light generating device suitable for frequent movement, which is designed based on the method of the present invention. 
     The technical proposal adopted in the present invention for solving the technical problem is to provide a method for generating diffuse reflection light, which is based on a luminescent lamp. The method comprises the following steps: 
     A. detachably fixing a reflector on the luminescent lamp by means of a connector; 
     B. elastically bending the reflector forwards by means of a pulling device in order to focus the diffuse reflection light, wherein one end of the pulling device is connected or sleeved with the reflector, the other end of the pulling device is connected with the connector, or the pulling device is hooped on the outer edge of the reflector. 
     In step B, the reflector may elastically be bent forwards in a longitudinal direction or a transverse direction by means of the pulling device, in order to obtain the diffuse reflection light. 
     The reflector may be a solid plate, the surface of which is rugged and granulated and also covered by light reflecting material. 
     The backside of the reflector may be provided with reinforcing plates and/or reinforcing bars. 
     As an improvement, the reflector is a hollowed-out plate, and its surface is adhered with a light reflecting thin film. Reinforcing bars and/or reinforcing plates are arranged at the unhallowed-out part of the reflector. 
     The reflector may be foldable, with every two folding parts of blades thereof being linked with each other through a hinge or a flexible foldable material. 
     As an improvement of the foldable reflector, the end of the folding part of the reflector is provided with a buckle so that the blades of the reflector are located at the same curved surface after being bent. 
     As an improvement, the edge of the reflector is provided with a gap which is covered by the light reflecting thin film. 
     The connector may be a binding tape or an elastic tape with the end thereof being provided with a nylon hasp, a sticking surface, an elastic buckle and a quick release buckle, or a clamping installation structure or a quick release screw structure. 
     The pulling device may be a semitransparent soft light diffuser, the upper end of which is connected or sleeved with the reflector, two sides of which are both connected or sleeved with the reflector, and the lower end of which is connected with the connector to change the dimension of the soft light diffuser so that the reflector can be bent to various extents, therefore changing equivalent luminescent area, leading to diffuse reflection effect, and generating soft light. 
     As an improvement of the pulling device, the pulling device is a molding tape, one end of which is connected and/or sleeved with the upper part of the reflector, and the other end of which is connected with the connector; the reflector is bent to various extents by adjusting the length of the molding tape in order to change equivalent luminescent area and lead to diffuse reflection effect. 
     When step A is implemented, a connection angle adjusting device, which is used for adjusting a connection angle γ during the connection of the reflector with the luminescent lamp, is added between the root of the reflector and the luminescent lamp. 
     The connection angle adjusting device is a wedge-shaped cushion block; the connection angle γ between the reflector and the luminescent lamp is adjusted by adjusting the height and/or upper and lower edges of the wedge-shaped cushion block. 
     In order to implement the above method for generating diffuse reflection light, the present invention further designs a device, compatible with the method, for generating diffuse reflection light. The device comprises a luminescent lamp, and especially, a reflector reflecting the light of the luminescent lamp, a connector integrally connecting the reflector with the luminescent lamp and a pulling device enabling the reflector to be elastically bent forwards. The reflector may detachably be fixed on the luminescent lamp by means of the connector and used for reflecting the light of the luminescent lamp. One end of the pulling device may be connected or sleeved with the reflector and the other end may be connected with the connector to enable the reflector to be elastically bent forwards so that the reflector forms a curved surface. 
     The reflector may be round, elliptical or polygonal, and the natural state of the reflector may be a flat plate state. 
     The reflector may be a metal plate, a plastic plate or a fiber plate. 
     As an embodiment of the reflector, the reflector is a solid plate, the surface of which is rugged and granulated and also covered by light reflecting material as well as the backside of which is provided with reinforcing plates and/or reinforcing bars. 
     As another embodiment of the reflector, the reflector is a hollowed-out plate, light reflecting thin films are adhered to the surface of the reflector, and the reinforcing bars and/or the reinforcing plates are arranged at the unhallowed-out part of the reflector. 
     As a further improvement of the reflector, the reflector is foldable, with the folding parts being linked through a hinge or a flexible foldable material. 
     The end of the folding part of the reflector is provided with a buckle so that blades of the reflector are located at the same curved surface after being bent. 
     As an improvement, the edge of the reflector is provided with a gap which is covered by the light reflecting thin film. 
     The connector is a binding tape or an elastic tape with the end thereof being provided with a nylon hasp, a sticking surface, an elastic buckle and a quick release buckle, or a clamping installation structure or a quick release screw structure. 
     The pulling device may be a semitransparent soft light diffuser, the upper end of which is connected or sleeved with the reflector and two sides of which are both connected or sleeved with the reflector to change the dimension of the soft light diffuser so that the reflector can be bent to various extents, therefore changing equivalent luminescent area, leading to diffuse reflection effect, and generating soft light. 
     The circumference of the soft light diffuser is provided with an opened hollow positioning edging inside which a tensioning tape passes through; two ends of the tensioning tape are connected with each other at the opening of the hollow positioning edging, and the soft light diffuser can be tightly hooped on the reflector by adjusting the tensioning tape. 
     The tensioning tape may be an elastic tape, a fastening tape or a rope. 
     The soft light diffuser may further comprise a connecting adhesive buckle, which is adhesively fixed on the connector to fix the soft light diffuser; the connecting adhesive buckle is an adhesive buckle, a snap fastener, a hook buckle or a lace. 
     As an improvement of the pulling device, the pulling device is a molding tape, one end of which is connected and/or sleeved with the upper part of the reflector and the other end of which is connected with the connector; the reflector is bent to various extents by adjusting the length of the molding tape in order to change equivalent luminescent area and lead to diffuse reflection effect. 
     The molding tape comprises a positioning adhesive buckle, which is adhesively connected to the connector to fix the molding tape. The positioning adhesive buckle may be an adhesive buckle, a snap fastener, a hook buckle, or a lace. 
     The device for generating diffuse reflection light may further comprise an angle adjusting device, which is arranged between the root of the reflector and the luminescent lamp. 
     The angle adjusting device is a wedge-shaped cushion block; a connection angle γ between the reflector and the luminescent lamp is adjusted by adjusting the height and/or upper and lower edges of the wedge-shaped cushion block. 
     The wedge-shaped cushion block may be a rectangular block consisting of two blocks with trapezoidal section. 
     The connector further comprises a first fixing bracket, which is mounted on the connector and used for supporting the device for generating diffuse reflection light, or used as a mounting bracket. 
     As a further improvement of the fixing bracket, the connector further comprises a second fixing bracket, the connector connects the second fixing bracket with the luminescent lamp integrally and fixedly, and one end of the second fixing bracket is detachably fixed at the middle part of the reflector. In order to realize the fixation of the second fixing bracket, one end of the second fixing bracket is an L-shaped hook, which is embedded into the middle part of the reflector and is fixed therewith in a manner of clamped connection. The device further comprises a luminescent lamp gasket, which is arranged between the connector and the luminescent lamp. The device further comprises a positioning gasket, which is arranged between the connector and the reflector. 
     Compared with the prior art, the method of the present invention has the following advantages: 
     1. The structure in accordance with the present invention is simple, the installation and the disassembly are convenient. In comparison, the installation and the disassembly of light box, soft light box, soft light umbrella and light reflecting umbrella in the prior art are all troublesome; in particular, the installation of a soft light box is hard to be mastered; the outdoor use is also inconvenient. In accordance with embodiments of the present invention, the reflector is detachably fixed on the luminescent lamp by means of a connector and is then adjusted by means of a pulling device. Therefore, the structure in accordance with the present invention is quite simple, the installation and the disassembly are also quite convenient, and the indoor and outdoor uses are both extremely convenient. 
     2. The equivalent luminescent area can be adjusted. In comparison, after the light reflection, soft light devices in the prior art are installed, the equivalent luminescent area cannot be adjusted since the reflector does not change. However, in using a method or a device based on embodiments of the present invention, the equivalent luminescent area of the light reflection, soft light devices can be adjusted by adjusting the curved surface of the reflector in order to meet the requirements under different environments. 
     3. The device in accordance with the present invention has the advantages of a large soft light area, good effect, excellent lightness and convenient movement simultaneously. In comparison, the light reflection, soft light devices in the prior art are either quite large in soft light area but troublesome in installation and disassembly, or convenient in movement but too small in light reflection, soft light areas. However, in the method and the device in accordance with embodiments of the present invention, the reflector and the luminescent lamp are connected with each other movably and integrally by means of a simple connection device, resulting in good lightness and mobility. Meanwhile, the pulling device can also adjust the dimension of the curved surface of the reflector so that the feature of a large area of the soft light umbrella and the light reflecting umbrella is also taken into consideration. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is an axonometric projection schematic diagram of the molding device (using soft light diffuser, longitudinal pulling) for generating diffuse reflection light according to an embodiment of the invention; 
         FIG. 2  is a front view of the molding device (using soft light diffuser, longitudinal pulling) for generating diffuse reflection light; 
         FIG. 3  is a left view of the molding device (using soft light diffuser, longitudinal pulling) for generating diffuse reflection light; 
         FIG. 4  is a cutaway view of  FIG. 2  along the line A-A; 
         FIG. 5  is a rear view of the molding device (using soft light diffuser, longitudinal pulling) for generating diffuse reflection light; 
         FIG. 6  is an axonometric projection schematic diagram of the molding device (using molding tape longitudinally) for generating diffuse reflection light; 
         FIG. 7  is a front view of the molding device (using molding tape longitudinally) for generating diffuse reflection light; 
         FIG. 8  is a left view of the molding device (using molding tape longitudinally) for generating diffuse reflection light; 
         FIG. 9  is a rear view of the molding device (using molding tape longitudinally) for generating diffuse reflection light; 
         FIG. 10  is a front view of the molding device (using soft light diffuser and elliptical reflector, transverse pulling) for generating diffuse reflection light; 
         FIG. 11  is a left view of the molding device (using soft light diffuser and elliptical reflector, transverse pulling) for generating diffuse reflection light; 
         FIG. 12  is a top view of the molding device (using soft light diffuser and elliptical reflector, transverse pulling) for generating diffuse reflection light; 
         FIG. 13  is a rear view of the molding device (using soft light diffuser and elliptical reflector, transverse pulling) for generating diffuse reflection light; 
         FIG. 14  is a front view of the molding device (using molding tape transversely) for generating diffuse reflection light; 
         FIG. 15  is a left view of the molding device (using molding tape transversely) for generating diffuse reflection light; 
         FIG. 16  is a top view of the molding device (using molding tape transversely) for generating diffuse reflection light; 
         FIG. 17  is a rear view of the molding device (using molding tape transversely) for generating diffuse reflection light; 
         FIG. 18  is an axonometric projection schematic diagram of the hollowed-out reflector of the molding device for generating diffuse reflection light; 
         FIG. 19  is a front view of the hollowed-out reflector of the molding device for generating diffuse reflection light; 
         FIG. 20  is a rear view of the hollowed-out reflector of the molding device for generating diffuse reflection light; 
         FIG. 21  is an axonometric projection schematic diagram of the solid reflector (provided with reinforcing plates) of the molding device for generating diffuse reflection light; 
         FIG. 22  is an axonometric projection schematic diagram of the solid reflector (provided with reinforcing rib) of the molding device for generating diffuse reflection light; 
         FIG. 23  is an axonometric projection schematic diagram of the hollowed-out reflector (provided with reinforcing rib) of the molding device for generating diffuse reflection light; 
         FIG. 24  is an axonometric projection schematic diagram of the hollowed-out reflector (provided with reinforcing plates) of the molding device for generating diffuse reflection light; 
         FIG. 25  is a front view of the soft light diffuser of the molding device for generating diffuse reflection light; 
         FIG. 26  is a left view of the soft light diffuser of the molding device for generating diffuse reflection light; 
         FIG. 27  is a rear view of the soft light diffuser of the molding device for generating diffuse reflection light; 
         FIG. 28  is a local axonometric projection schematic diagram of the first fixing bracket and the connector of the molding device for generating diffuse reflection light; 
         FIG. 29  is a local axonometric projection schematic diagram of the first fixing bracket and the connector (using quick release screw for fixation) of the molding device for generating diffuse reflection light; 
         FIG. 30  is an axonometric projection schematic diagram of the connection angle adjusting device (wedge-shaped cushion block) of the molding device for generating diffuse reflection light; 
         FIG. 31  and  FIG. 32  are schematic diagrams showing the change of the equivalent luminescent area S before and after the change of the bending extent of the reflector of the molding device for generating diffuse reflection light; 
         FIG. 33  and  FIG. 34  are axonometric projection schematic diagrams of two different angles of the molding device for generating diffuse reflection light (the embodiment in which the second fixing bracket is fixed in the middle part of the reflector, the reflector is rectangular, and the soft light diffuser is used as the pulling device); 
         FIG. 35  is an axonometric projection schematic diagram of the reflector in the molding device shown as  FIG. 33  and  FIG. 34 . 
         FIG. 36  is a local axonometric projection schematic diagram of the second fixing bracket and the connector of the molding device for generating diffuse reflection light; 
         FIG. 37  is an axonometric projection schematic diagram of the second fixing bracket of the molding device for generating diffuse reflection light. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Further detailed description is made below with reference to the preferred embodiments shown in the drawings. 
     As shown in  FIG. 1  to  FIG. 37 , the method in accordance with preferred embodiments of the present invention for generating diffuse reflection light is based on a luminescent lamp and comprises the following steps: 
     A. a reflector  10  is detachably fixed on the luminescent lamp  30  by means of a connector  20 ; and 
     B. the reflector  10  is elastically bent forwards by means of a pulling device  40  in order to focus the diffuse reflection light. 
     Also, in step B, the reflector  10  is elastically bent forwards in a longitudinal direction or a transverse direction by means of the pulling device  40 , in order to obtain the diffuse reflection light. 
     There are two ways to use the reflector  10 . 
     In accordance with the first way, the reflector is a solid plate. When the reflector is the solid plate, the surface of the reflector is provided with plenty of rugged grains so that one surface of the reflector  10  for light reflection is rugged and granulated, and the surface of the reflector is also covered by light reflecting material in order to reinforce the effect of diffuse reflection. In order to strengthen the toughness of the reflector  10 , the backside of the reflector is provided with reinforcing plates  82  and/or reinforcing bars  83 . 
     In accordance with the second way, the reflector is a hollowed-out plate, aiming at reducing the weight of the reflector  10  effectively when a reflector with a large area is needed. When the hollowed-out reflector is used, light reflecting thin films  101  are adhered to the light reflecting surface of the reflector; in order to strengthen the toughness of the hollowed-out reflector, the reinforcing bars  83  and/or the reinforcing plates  82  are arranged at the unhallowed-out part of the backside of the reflector. 
     The reflector  10  may be designed to be foldable for purpose of convenient carrying. The reflector  10  can consist of at least two blades  11 , with every two folding parts of the blades being linked with each other through a hinge or a flexible foldable material. In order to ensure that the blades  11  are located at the same curved surface when the foldable reflector  10  is bent, the end of the folding part of the reflector  10  is provided with a buckle  13 . 
     The connector  20  according to an embodiment of the present invention is a binding tape or an elastic tape with the end thereof being provided with a nylon hasp, a sticking surface, an elastic buckle, a quick release buckle, a clamping installation structure, or a quick release screw structure. 
     There are two ways of using the pulling device  40 . 
     In accordance with the first way, a semitransparent soft light diffuser  404  is adopted, the upper end of which is connected or sleeved with the reflector  10 , two sides of which are both connected or sleeved with the reflector  10 , the lower end of which is connected with the connector  20 . When the dimension of the soft light diffuser  404  is changed, for example, when the soft light diffuser  404  is contracted transversely and/or longitudinally, then the reflector  10  may be bent to different extent, therefore changing equivalent luminescent area, leading to diffuse reflection effect, and generating soft light. 
     In accordance with the second way, a molding tape  405  is adopted. There are three proposals for the installation and use of the molding tape  405 , one end of the molding tape is connected and/or sleeved with the upper part of the reflector  10  and the other end is connected with the connector  20 . The reflector ( 10 ) may be bent to various extents by adjusting the length of the molding tape  405 , therefore changing equivalent luminescent area and leading to diffuse reflection effect. When the soft light diffuser  404  or the molding tape  405  is hooped on the outer edge of the reflector  10 , a gap which is covered by the light reflecting thin films  101  can be arranged at the edge of the reflector  10  in order to enable the bending of the reflector  10  and form an inward curved surface more easily. 
     During practical application, the reflector  10  sometimes needs to change the primary irradiation direction of diffuse reflection light. In order to achieve such a change, when the step A is implemented, a connection angle adjusting device  90 , which is used for adjusting a connection angle γ during the connection of the reflector  10  with the luminescent lamp  30 , is added between the root of the reflector  10  and the luminescent lamp  30 . In this case, the reflector  10  can change the primary irradiation direction of light. During practical application, the connection angle adjusting device  90  is a wedge-shaped cushion block which consists of two blocks with trapezoidal section and identical dimension and which is shaped as a rectangular block, the connection angle γ between the reflector  10  and the luminescent lamp  30  can be adjusted by adjusting the height M and/or upper edge L and lower edge N of the rectangular block. During practical application, blocks with different dimensions can be made as required to accomplish replacement. 
     A device for generating diffuse reflection light, which is designed according to the present invention, may comprise a plurality of embodiments based on different reflector  10 , connector  20  and pulling device  40 . A detailed description is made below with reference to  FIG. 1  to  FIG. 32 . 
     A device for generating diffuse reflection light according to an embodiment of the present invention comprises a luminescent lamp  30 , a reflector  10  reflecting the light of the luminescent lamp  30 , a connector integrally connecting the reflector  10  with the luminescent lamp  30  and a pulling device  40  enabling the reflector  10  to be elastically bent forwards, and further comprises a first fixing bracket  201  for supporting the entire diffuse reflection light generating device or being used as a mounting bracket. The reflector  10  is a solid plate or a hollowed-out plate and is round, elliptical or polygonal in shape, preferably elliptical and polygonal. The reflector  10  is an elastic plate made of metal plate, plastic plate or fiber plate, preferably metal plate. As shown in  FIG. 21  and  FIG. 22 , the reflector  10  is the solid plate. In order to strengthen the toughness of the reflector  10 , the backside of the reflector is provided with reinforcing plates  82  and/or reinforcing bars  83 ; light reflecting material is coated on the light reflecting surface of the reflector  10  to form a diffuse reflection surface, and in order to further strengthen the diffuse reflection effect, the light reflecting surface is provided with rugged grains so that the light reflecting surface of the reflector  10  is rugged. As shown in  FIGS. 18 ,  19 ,  23 , and  24 , the reflector  10  is the hollowed-out plate, in order to strengthen the elasticity and the toughness of the reflector  10 , the reinforcing bars  83  and/or the reinforcing plates  82  are arranged at the unhallowed-out part of the backside of the reflector; and in order to solve the problem that a light reflecting layer is difficult to be arranged on the surface of the hollowed-out reflector, light reflecting thin films  101  or light reflecting thin films  101  with rugged grains on the surface thereof can be adhered to the surface of the reflector  10 . 
     In the diffuse reflection light generating device according to the present invention, the reflector  10  is preferably the hollowed-out plate, which reduces the weight of the reflector  10  and lightens the device of the present invention. For facilitating convenient carrying, the reflector  10  can become more convenient in a foldable type as shown in  FIG. 18-20 ,  FIG. 23 , and  FIG. 24 , the number of folds of the foldable plate can be based on actual application, the foldable plate at least comprises two blades  11 , preferably two blades with the folding part thereof being linked through a hinge or a flexible foldable material. 
     The connector  20  is a device integrally connecting the luminescent lamp  30  with the reflector  10 , which is a binding tape or an elastic tape with the end thereof being provided with a nylon hasp, a sticking surface, an elastic buckle, a quick release buckle, a clamping installation structure, or a quick release screw structure. As shown in  FIG. 28 , the connector  20  is a binding tape with the end thereof being provided with the sticking surface. A connector adopting a quick release screw structure is shown in  FIG. 29 . 
     The pulling device may be realized by adopting the soft light diffuser  404  or the molding tape  405 . 
     A soft light diffuser for a device in accordance with the present invention is shown in  FIG. 25 to 27 . The circumference of the soft light diffuser  404  is provided with an opened hollow positioning edging  4041  inside which a tensioning tape  4042  passes through; two ends of the tensioning tape  4042  are connected with each other at the opening of the hollow positioning edging  4041 ; and the tensioning tape  4042  is an elastic tape, a fastening tape or a rope, preferably the elastic tape. 
       FIGS. 1-5  show the first preferred embodiment of a diffuse reflection light generating device according to the present invention, which comprises the hollowed-out reflector  10 , the semitransparent soft light diffuser  404 , the connector  20  in the form of the binding tape with the end thereof being provided with the sticking surface, the connection angle adjusting device  90  with the wedge-shaped cushion block  92  as the rectangular block and the first fixing bracket  201 . The wedge-shaped cushion block  92  is arranged between the root of the reflector  10  and the luminescent lamp  30  and is the rectangular block consisting of two blocks with trapezoidal section, the stereoscopic diagram thereof is shown in  FIG. 30 . The binding tap serving as the connector  20  passes through two slots (specifically schematic as  FIG. 18 to 24 , or in the form of two holes according to actual application situation) at the bottom of the reflector  10  and then tightly binds the root of the reflector  10  with the luminescent lamp  30  and the first fixing bracket  201 . The upper end of the soft light diffuser  404  serving as the pulling device is connected or sleeved to the reflector  10 , and the two sides thereof are also connected or sleeved to the reflector  10 . In this embodiment, the soft light diffuser  404  covers the reflector  10  in a sleeved manner. The tensioning tape passing through the opened hollow positioning edging  4041  at the circumference is connected at the opening. The reflector  10  can be elastically bent forwards to form a curved surface by adjusting the tensioning degree of the tensioning tape  4042 , and the equivalent luminescent area can be changed when the reflector  10  is bent to different extent. The soft light diffuser  404  further comprises a connecting adhesive buckle  406 , which is positioned at the lower part of the soft light diffuser  404  and which is adhesively fixed on the connector  20  to fix the lower part of the soft light diffuser  404  and pull the reflector  10 . Because the connecting adhesive buckle  406  is a movable adhesive buckle, the degree of bending of the curved surface of the reflector  10  can also be adjusted by adhering the connecting adhesive buckle  406  to the vertical position on the connector  20 . The connecting adhesive buckle  406  may be an adhesive buckle, a snap fastener, a hook buckle or a lace. In the first preferred embodiment of the present invention, the reflector  10  is a foldable hollowed-out reflector. To ensure that the blades  11  are located at the same curved surface when the bent reflector is bent, the end of the folding part of the reflector  10  can also be provided with a buckle  13 , which is shown in  FIG. 18 to 20 . As shown in  FIG. 30 , the wedge-shaped cushion block  92  is replaceable, the connection angle γ (shown in  FIG. 4 ) between the reflector  10  and the luminescent lamp  30  can be adjusted only by the replacement of the trapezoidal block with different upper edge L, lower edge N and height M. 
     What is shown in  FIGS. 6 to 9  is the second preferred embodiment of a diffuse reflection light generating device according to the present invention, which comprises the hollowed-out reflector  10 , the molding tape  405 , the connector  20  in the form of the binding tape with the end thereof being provided with the sticking surface, the connection angle adjusting device  90  with the wedge-shaped cushion block  92  similarly as the rectangular block and the first fixing bracket  201 . The connection way between the reflector  10  and the connector  20 , the first fixing bracket  201  and the adjustment way of the connection angle adjusting device  90  are the same as those in the first embodiment; the difference lies in the way of using the pulling device  40 , which is to longitudinally bend the reflector  10 . Two ends of the molding tape  405  are respectively adhesively fixed on two opposite sides of the connector  20 , and the middle part thereof is sleeved on the upper part of the reflector  10 . In order to prevent the molding tape  405  sleeved on the upper part of the reflector  10  from sliding, two grooves are arranged at two sides of the upper part of the reflector  10  to clamp the molding tape  406 . Just as the connecting adhesive buckle  406  arranged at the lower part of the soft light diffuser  404  in the first embodiment, two ends of the molding tape  405  comprise positioning adhesive buckles  407  which are adhesively connected to the connector  20  in order to fix the molding tape  405 . The degree of bending the reflector  10  can be adjusted by adjusting the vertical position of the positioning adhesive buckles  407  on the connector  20 . The equivalent luminescent area can be changed when the reflector  10  is bent to different extent. Furthermore, the degree of bending the reflector  10  can also be adjusted by adopting a molding tape with a different length. The positioning adhesive buckle  407  is an adhesive buckle, a snap fastener, a hook buckle, or a lace.  FIGS. 14 to 17  show another embodiment in which the molding tape is used as the pulling device. The reflector  10  is transversely bent. The molding tape  405  is transversely hooped in the middle position of the reflector  10 . The reflector  10  can be bent transversely by adjusting the length of the molding tape  405 . Similarly, the equivalent luminescent area can also be changed. 
       FIGS. 10 to 13  show the soft light diffuser  404  as the pulling device. The reflector  10  is elliptical hollowed-out reflector, and pulled by the pulling device, and two sides of the elliptical reflector are bent forwards to form a curved surface. 
     In order to explain change of equivalent luminescent area of a device of the present invention, as shown in  FIGS. 31 and 32 , R represents a central normal of the reflector  10 , S represents an orthographic projection area of the reflector  10 , namely the equivalent luminescent area of a device in accordance with the present invention, and angle α represents an included angle between the central normal R and the ground or the luminescent plane of a light source. The angle α is changed by adjusting the soft light diffuser  404 . When the angle α in  FIG. 31  is enlarged to the angle α in  FIG. 32 , the bending surface of the reflector  10  is changed to different extent, which not only adjusts the primary irradiation direction of the diffuse reflection light of the reflector  10 , but also changes the equivalent luminescent area S of the device in accordance with the present invention. This is an effect the light box, the light reflection and soft light device in the prior art cannot achieve. 
     Similarly, when the molding tape  405  is used as the pulling device, the angle α can be changed just like the use of soft light diffuser  404  for adjusting the degree of bending of the reflector  10 , which not only adjusts the primary irradiation direction of the diffuse reflection light of the reflector  10 , but also adjusts the equivalent luminescent area S. That is to say, the device of the present invention can adjust the equivalent luminescent area in order to adapt to the use under different circumstances. 
     What is shown in  FIG. 33 to 37  is a diffuse reflection light generating device fixed by a fixing bracket in accordance with another preferred embodiment of the present invention. The difference of this embodiment from the above preferred embodiment lies in the fact that, the fixing bracket is the second fixing bracket  202 , the connector  20  connects the second fixing bracket  202  with the luminescent lamp  30  integrally and fixedly, one end of the second fixing bracket  202  being an L-shaped hook which is embedded into the middle part of the reflector  20  and fixed therewith in a manner of clamped connection. The second fixing bracket is detachably fixed in the middle part of the reflector  10 . The edge of the reflector  10  is provided with a gap covered by a light reflecting thin film. A luminescent lamp gasket  203  is arranged between the connector  20  and the luminescent lamp  30 ; and a positioning gasket  204  is arranged between the connector  20  and the reflector  10 . In this embodiment, the pulling device can be realized by adopting the soft light diffuser  404  hooped on the outer edge of the reflector  10  (or can be realized by adopting the molding tape  405  hooped on the outer edge of the reflector  10 ). The change of bending of the reflector  10  is realized by the tensioning tape at the edge of the soft light diffuser  404  (or adjusting the length of the molding tape  405 ), and the specific embodiment is the same as the aforementioned preferred embodiment. No connection angle adjusting device is designed in this embodiment. The change of the degree of bending of the reflector  10  is accomplished by the contraction of the soft light diffuser  404  or the replacement of the soft light diffuser with different dimension (or by adjusting the length of the molding tape  405 ). 
     The above preferred embodiments are presented to further illustrate the invention but should not be construed as in any way to limit its scope. Some simple omissions or substitutions can be made by a person of ordinary skill in this art to which the present invention pertains without departing from the concept of the present invention and shall be considered to be within the scope of protection of the present invention.