Light source device and camera test system

Abstract

The present invention belongs to the technical field of camera performance testing, and more specifically, it relates to a light source device and a camera testing system. Among them, the light source device is provided with a light guide plate and a light shielding component inside a box body, a first gap is formed between the light guide plate and the cavity wall of the installation cavity, a second gap is formed between the light shielding component and the cavity wall of the installation cavity, the first gap is connected with the second gap to form a light path, and the lamp beads are installed in the light path. In this way, the light emitted by the lamp beads propagates in the light path, and after being emitted through the light guide plate, it is emitted from the light-transmitting plate of the light outlet. The light emitted by the lamp beads is not directly emitted to the light-transmitting plate, but passes through the light path and then emits after passing through the light guide plate, which can not only reduce the brightness of the emitted light, but also improve the uniformity of the light intensity of the emitted light, so that the light guide plate emits light uniformly, thereby meeting the lighting requirements of low illumination and high uniformity.

Description

Technical Field

[0001] The present invention belongs to the technical field of camera performance testing, and more specifically, relates to a light source device and a camera testing system. Background Art

[0002] For cameras, such as mobile phone cameras and still cameras, various performance tests need to be conducted before they leave the factory. In the related art, when using an image test card to conduct a performance test on a camera, a light source is required to supplement the test lighting.

[0003] With the continuous optimization of camera performance, the requirements for low-light performance are becoming increasingly stringent. When testing camera low-light performance, it is necessary to test the performance under 1 Lux or even lower illumination. However, the light intensity provided by the current light source devices used for camera performance testing is too high and cannot meet the low-light testing requirements. Summary of the Invention

[0004] The purpose of the embodiments of the present invention is to provide a light source device and a camera testing system to solve the technical problem in the prior art that the light intensity provided by the light source for camera testing is too high and cannot meet the low-light performance testing requirements of the camera.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a light source device, comprising:

[0006] The box body has an installation cavity inside and a light outlet penetrating the installation cavity on the top;

[0007] A light-transmitting plate is connected to the box body and is adapted to cover the light outlet;

[0008] A light guide plate is installed in the installation cavity and is located below the light-transmitting plate, with the light guide plate and the cavity wall of the installation cavity being spaced apart to form a first gap;

[0009] A light shielding component is installed in the installation cavity, and the light shielding component cooperates with the cavity wall of the installation cavity to form a second gap, and the second gap is connected to the first gap to form a light passage;

[0010] Lamp beads are installed in the light path.

[0011] In some embodiments, the light guide plate is attached to the bottom surface of the box, and at least a portion of the side wall of the light guide plate is spaced from the side wall of the installation cavity to form a first gap.

[0012] In some embodiments, the light guide plate is installed in the middle of the installation cavity, the entire side wall of the light guide plate is spaced apart from the side wall of the installation cavity, and the first gap is an annular gap arranged around the light guide plate.

[0013] In some embodiments, the shading assembly includes a first shading plate and a second shading plate. The first shading plate is vertically connected between the light guide plate and the light-transmitting plate. The first shading plate is spaced apart from the side wall of the mounting cavity to form a second gap. The second shading plate is arranged at one end of the second gap close to the light-transmitting plate. The second shading plate is adapted to block the light emitted from the lamp beads toward the light-transmitting plate.

[0014] In some embodiments, the second light shielding plate is an annular light shielding plate disposed around a side of the light guide plate, and the second gap is an annular gap disposed around the light guide plate.

[0015] In some embodiments, an end portion of the first light shielding plate is spaced apart from the light transmitting plate, and the second light shielding plate is sandwiched between the light transmitting plate and the first light shielding plate.

[0016] In some embodiments, the lamp beads are installed on the bottom surface of the second shading plate.

[0017] In some embodiments, the portion of the outer surface of the shading component that can be illuminated by light and the portion of the cavity wall of the installation cavity that can be illuminated by light are both covered with a diffuse reflection layer.

[0018] In some embodiments, the light-transmitting plate is a diffuser plate.

[0019] The above one or more technical solutions in the light source device provided by the present invention have at least one of the following technical effects: the light source device of the present application is provided with a light guide plate and a light shielding assembly inside the housing, the light guide plate and the cavity wall of the installation cavity are separated to form a first gap, the light shielding assembly and the cavity wall of the installation cavity are arranged in cooperation to form a second gap, the first gap and the second gap are connected to form a light path, and the lamp beads are installed in the light path. In this way, the light emitted by the lamp beads propagates in the light path, and is emitted through the light guide plate and then emitted from the light-transmitting plate through the light outlet. In this way, the light emitted by the lamp beads is not directly emitted to the light-transmitting plate, but passes through the light path and then emits from the light guide plate, thereby reducing the brightness of the emitted light and meeting lower illumination requirements; in addition, the light is reflected and diffused by each light guide point in the light guide plate and then emitted from the light guide plate, which can also effectively improve the uniformity of the light intensity of the emitted light, so that the light guide plate emits light uniformly, thereby achieving low illumination and high uniformity lighting requirements.

[0020] Another technical solution adopted by the present invention is: a camera testing system, including the above-mentioned light source device.

[0021] The above one or more technical solutions in the camera testing system provided by the present invention have at least one of the following technical effects: the camera testing system of the present application uses the above-mentioned light source device as the testing environment light source. The light brightness provided by the light source device is low and the lighting is uniform, which meets the requirements of the low-light performance test of the camera and provides a guarantee for the low-light performance test of the camera. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A schematic diagram of the structure of a light source device provided in one embodiment of the present invention;

[0024] Figure 2 For the Figure 1 Sectional view along line AA;

[0025] Figure 3 for Figure 2 Magnified view at point A in the middle;

[0026] Figure 4 for Figure 1 A schematic diagram of a partial structure of the light source device shown;

[0027] Figure 5 for Figure 1 The exploded schematic diagram of the light source device is shown.

[0028] Among them, the reference numerals in the figures are:

[0029] 10. Box; 11. Mounting cavity; 12. Light outlet; 13. Frame; 14. Bottom plate;

[0030] 20. Translucent panels;

[0031] 30. Light guide plate; 31. First gap;

[0032] 40. Shading assembly; 41. Second gap; 42. First shading plate; 43. Second shading plate; 44. Baffle;

[0033] 50. Lamp beads; 51. Light board;

[0034] 60. Light path;

[0035] 70. Press plate. DETAILED DESCRIPTION

[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clear, the following is a summary of the technical problems, technical solutions and beneficial effects to be solved by the present invention. Figures 1 to 5 It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0037] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0038] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0040] References to "one embodiment," "some embodiments," or "an embodiment" in this specification mean that a particular feature, structure, or characteristic described in connection with that embodiment is included in one or more embodiments of the present invention. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in yet other embodiments" appearing in various places throughout this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. Furthermore, in one or more embodiments, the particular features, structures, or characteristics may be combined in any suitable manner.

[0041] like Figures 1 to 5 As shown, an embodiment of the present invention provides a light source device suitable for use as an ambient light source when a camera performs a performance test, and particularly suitable for use as an ambient light source when a camera performs a low-light performance test.

[0042] Specifically, if Figure 1 and Figure 2As shown, the light source device includes a box body 10 and a light-transmitting plate 20. The interior of the box body 10 is hollow and forms an installation cavity 11. The top of the box body 10 is provided with a light outlet 12 that passes through the installation cavity 11. The light-transmitting plate 20 is connected to the box body 10 and is adapted to cover the light outlet 12. The box body 10 is made of opaque material, that is, only the light outlet 12 part of the entire box body 10 can emit light through the light-transmitting plate 20.

[0043] Furthermore, the light source device also includes a light guide plate 30, a shading assembly 40 and a lamp bead 50. The light guide plate 30 is installed in the installation cavity 11, and the light guide plate 30 is spaced apart from the cavity wall of the installation cavity 11 to form a first gap 31; the shading assembly 40 is installed in the installation cavity 11, and the shading assembly 40 and the cavity wall of the installation cavity 11 are cooperated to form a second gap 41, and the second gap 41 is connected to the first gap 31 to form a light path 60.

[0044] The light guide plate 30 is used to guide light, and the lamp beads 50 are installed in the light path 60. Specifically, the lamp beads 50 can be installed in the first gap 31, the second gap 41, or both the first gap 31 and the second gap 41. In this way, the light emitted by the lamp beads 50 propagates in the light path 60 and is transmitted through the light guide plate 30 before being emitted. The light guide plate 30 is located below the light-transmitting plate 20. The light emitted from the light guide plate 30 then passes through the installation cavity 11 and is emitted through the light-transmitting plate 20. The light shielding assembly 40 is made of a light-shielding material and can be used to block light, thereby ensuring that light propagates only within the light path 60 and can only be emitted through the light guide plate 30.

[0045] The light source device provided by an embodiment of the present invention has a light guide plate 30 and a shading assembly 40 arranged inside a box body 10. The light guide plate 30 and the cavity wall of the installation cavity 11 are separated to form a first gap 31. The shading assembly 40 and the cavity wall of the installation cavity 11 are cooperated to form a second gap 41. The first gap 31 is connected to the second gap 41 to form a light path 60, and the lamp bead 50 is installed in the light path 60. In this way, the light emitted by the lamp bead 50 propagates in the light path 60, and is emitted through the light guide plate 30 and then emitted from the light transparent plate 20 through the light outlet 12. In this way, the light emitted by the lamp bead 50 is not directly emitted to the light transparent plate 20, but passes through the light path 60 and then passes through the light guide plate 30 before being emitted, thereby reducing the brightness of the emitted light and meeting lower illumination requirements; in addition, the light is reflected and diffused by each light guide point in the light guide plate 30 and then emitted from the light guide plate 30, which can also effectively improve the uniformity of the light intensity of the emitted light, so that the light guide plate 30 emits light evenly, thereby achieving low illumination and high uniformity lighting requirements.

[0046] It will be appreciated that in this embodiment, light emitted by the lamp beads 50 is emitted through the light guide plate 30. Therefore, the intensity of the light emitted from the light-transmitting plate 20 can be determined by designing the size and number of the light guide points on the light guide plate 30, thereby enabling the light source device of the present invention to provide light intensities that meet different illumination requirements. Furthermore, the light intensity provided by the light source device of the present invention can also be adjusted by adjusting the number of lamp beads 50 within the light channel and the operating power of the lamp beads 50.

[0047] In this embodiment, the light guide plate 30 uses an optical-grade acrylic sheet or other light guide sheet as a substrate, and then uses a high-precision laser machine to engrave light guide points or other equipment to print light guide points. The light emitted by the lamp beads 50 is absorbed and retained by the substrate. When the light hits each light guide point, the reflected light will diffuse to various angles and be emitted from the substrate, i.e., the front of the light guide plate 30. In this way, the light guide plate 30 is provided with light guide points of various densities and sizes, so that light can be uniformly emitted through the light guide plate 30. In addition, the inner bottom surface of the light guide plate 30 is also provided with a reflective film layer, which is used to reflect the light exposed from the bottom surface back into the light guide plate 30, thereby improving the efficiency of light use and reducing power consumption. It can be understood that the light guide plate 30 of the present application is a general light guide plate in the optical field, and its specific structure and light guide principle will not be described in more detail here.

[0048] In some specific embodiments of the present invention, Figure 1 and Figure 2 As shown, the light-transmitting plate 20 is a diffuser. The diffuser interferes with the outgoing light. The light beam angle is expanded (approximately expanded to 160° to 176°) after passing through the diffuser. Thus, the illumination is further reduced as the beam angle increases.

[0049] In some specific embodiments of the present invention, Figure 2 and Figure 4 As shown, the light guide plate 30 is attached to the bottom surface of the box body 10 , and at least a portion of the side wall of the light guide plate 30 is spaced from the side wall of the installation cavity 11 to form a first gap 31 .

[0050] Specifically, in this embodiment, Figure 2 、 Figure 4 and Figure 5 As shown, the housing 10 includes a frame 13 and a bottom plate 14. The top opening of the frame 13 forms the aforementioned light outlet 12. The bottom plate 14 is connected to the frame 13 and adapted to cover the bottom opening of the frame 13. The aforementioned light guide plate 30 is attached to the upper surface of the bottom plate 14, and at least a portion of the sidewall of the light guide plate 30 is spaced from the inner sidewall of the frame 13, thereby forming the aforementioned first gap 31. The gap height of the first gap 31 is equal to the thickness of the light guide plate 30. When different illumination levels are required, the light guide plate 30 of different thicknesses can be adjusted and replaced, which is flexible and convenient to use and has a wide range of adaptability.

[0051] In a specific embodiment, Figure 2 、 Figure 3 and Figure 4 As shown, the shading assembly 40 includes a first shading plate 42 and a second shading plate 43, wherein the first shading plate 42 is vertically connected between the light guide plate 30 and the light transparent plate 20, the first shading plate 42 is spaced apart from the side wall of the mounting cavity 11 and forms a second gap 41, the first shading plate 42 is used to block light to prevent light from being emitted from the position between the light guide plate 30 and the light transparent plate 20, the second shading plate 43 is arranged at one end of the second gap 41 close to the light transparent plate 20, the second shading plate 43 is used to adapt to block the light emitted by the lamp bead 50 toward the light transparent plate 20, and prevent the light from being directly emitted from the light transparent plate 20.

[0052] In this embodiment, if Figure 2 and Figure 4 As shown, the light guide plate 30 is installed in the middle of the installation cavity 11 , the entire side wall of the light guide plate 30 is spaced apart from the side wall of the installation cavity 11 , and the first gap 31 is an annular gap arranged around the light guide plate 30 .

[0053] Specifically, if Figure 2 、 Figure 4 and Figure 5 As shown, the frame 13 is a square frame 13, and the light guide plate 30 is a rectangular plate. The four sides of the light guide plate 30 are spaced apart from the inner wall of the frame 13, so that the first gap 31 is an annular gap surrounding the light guide plate 30. In this way, the light emitted by the lamp beads 50 enters the light guide plate 30 from all four sides of the light guide plate 30, and the light distribution is more uniform, which can further improve the uniformity of the light emitted from the light guide plate 30.

[0054] Furthermore, in this embodiment, Figure 2 and Figure 4 As shown, the aforementioned second light shielding plate 43 is an annular light shielding plate disposed around the side of the light guide plate 30, and the second gap 41 is an annular gap disposed around the light guide plate 30. Specifically, the first light shielding plate 42 is composed of four rectangular plates connected end to end. The four rectangular plates are spaced correspondingly with the four sides of the rectangular frame 13, thereby forming an annular gap within the mounting cavity 11. Thus, the lamp beads 50 are installed within this annular gap, ensuring that light emitted by the lamp beads 50 enters the light guide plate 30 from all four sides, improving the uniformity of light distribution and ensuring uniform light output from the light guide plate 30.

[0055] In a specific embodiment, Figure 2 、 Figure 3 and Figure 4As shown, the end of the first light shielding plate 42 is spaced apart from the light-transmitting plate 20, and the second light shielding plate 43 is sandwiched between the light-transmitting plate 20 and the first light shielding plate 42. In this way, the bottom plate 14 is arranged close to the light-transmitting plate 20 to avoid the existence of a light-transmitting gap, and the light-shielding effect is better.

[0056] Furthermore, the lamp beads 50 are mounted on the bottom surface of the second shading plate 43. Specifically, the bottom surface of the second shading plate 43 is provided with a lamp board 51, and the lamp beads 50 are mounted on the lamp board 51. In this way, the lamp beads 50 are arranged at the end of the second gap 41 away from the first gap 31, and the light is roughly distributed in the second gap 41 and the first gap 31. Figure 2 The light is transmitted along the path indicated by the dotted arrow, and the propagation path of the light is extended, which can better reduce the brightness of the light, and the light is reflected and refracted in the first gap 31 and the second gap 41 to mix, which helps to improve the uniformity of the light output from the light guide plate 30.

[0057] In some specific embodiments of the present invention, Figure 3 、 Figure 4 and Figure 5 As shown, the light shielding assembly 40 further includes a baffle 44 in a ring shape disposed on the upper surface of the light guide plate 30. The baffle 44 presses against the side of the light guide plate 30, and the first light shielding plate 42 is connected to the baffle 44 at the end facing the light guide plate 30. The baffle 44 is provided to connect the first light shielding plate 42. On the one hand, the baffle 44 firmly presses the light guide plate 30 against the bottom plate 14 of the housing 10, preventing the light guide plate 30 from shaking and affecting the stability of the light output. On the other hand, the first light shielding plate 42 is connected between the light guide plate 30 and the light-transmitting plate 20 via the baffle 44, which improves the connection stability and reliability of the first light shielding plate 42.

[0058] In some specific embodiments of the present invention, Figure 2 、 Figure 3 and Figure 4 As shown, the outer surface of the light-shielding assembly 40, which is exposed to light, and the wall of the mounting cavity 11, which is exposed to light, are all covered with a diffuse reflective layer. Specifically, the wall surface of the second light-shielding plate 43 located within the first and second gaps 31, 41, the portion of the wall surface of the second light-shielding plate 43 located between the light guide plate 30 and the light-transmitting plate 20, the bottom surface of the first light-shielding plate 41, the wall surface of the mounting cavity 11 located within the first and second gaps 31, 41, and the wall surface portion of the baffle 44 located above the light guide plate 30 are all covered with a diffuse reflective coating. This improves the color consistency and uniformity of the light within the light path 60, as well as the color consistency and uniformity of the light emitted from the light guide plate 30, thereby improving the uniformity of the light emitted from the light-transmitting plate 20.

[0059] In this embodiment, the diffuse reflection layer can be a rough surface layer formed on the surface of the structure, or it can be a nano diffuse reflection coating formed by coating the surface of the structure with nano materials. It should be noted that in other embodiments, the diffuse reflection layer can also be formed in other ways. The above description of the diffuse reflection layer is only exemplary and does not constitute the only limitation. In other specific embodiments of the present invention, such as Figure 2 、 Figure 3 and Figure 5 As shown, the above-mentioned light source device also includes a pressure plate 70, which is arranged at the edge of the light outlet 12 and stacked above the light-transmitting plate 20. The pressure plate 70 is connected to the box body 10 and cooperates with the box body 10 to clamp the light-transmitting plate 20. The structure is simple and easy to assemble.

[0060] Specifically, in this embodiment, the pressure plate 70 is an annular plate, which presses the light-transmitting plate 20 on all sides to ensure the stable installation of the light-transmitting plate 20. At the same time, the pressure plate 70 is made of opaque material, which can also block the assembly gap and prevent light from being emitted from the assembly gap.

[0061] In the light source device of the above-mentioned embodiments of the present invention, the light emitted by the lamp bead 50 propagates in the light path 60, and is emitted through the light guide plate 30 and then emitted from the light-transmitting plate 20 through the light outlet 12. The light emitted by the lamp bead 50 passes through the light path 60 and then is emitted through the light guide plate 30, which can reduce the brightness of the emitted light and meet lower illumination requirements; and the light is reflected and diffused by each light guide point in the light guide plate 30 and then emitted from the light guide plate 30, which can also effectively improve the uniformity of the light intensity of the emitted light, so that the light guide plate 30 emits light uniformly, thereby achieving low illumination and high uniformity lighting requirements.

[0062] Another embodiment of the present invention also provides a camera testing system for performing performance testing on a camera. The camera testing system includes the above-mentioned light source device and uses the above-mentioned light source device to provide an ambient light source for testing, thereby completing performance testing of the camera including at least low-light performance testing.

[0063] The camera testing system provided by the embodiments of the present invention utilizes the aforementioned light source device as the ambient light source for testing. The light source device provides low-brightness and uniform illumination, meeting the requirements for low-light performance testing of the camera and providing assurance for low-light performance testing of the camera. Furthermore, the camera performance testing system of the present invention also includes other beneficial effects of the light source device of each of the aforementioned embodiments, which will not be further detailed here.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A light source device, characterized in that: include: A box body, with an installation cavity inside and a light outlet penetrating the installation cavity on the top; A light-transmitting plate connected to the box body and adapted to cover the light outlet; A light guide plate is installed in the installation cavity and is located below the light-transmitting plate, wherein the light guide plate is spaced apart from a cavity wall of the installation cavity and a first gap is formed; A shading component is installed in the installation cavity, the shading component cooperates with the cavity wall of the installation cavity to form a second gap, and the second gap is connected with the first gap to form a light passage; A lamp bead is installed in the light path, and the light emitted by the lamp bead propagates in the light path, is conducted by the light guide plate, passes through the installation cavity, and is emitted through the light-transmitting plate; The light guide plate is attached to the bottom surface of the box body, at least part of the side wall of the light guide plate is spaced from the side wall of the installation cavity to form the first gap, and the thickness of the light guide plate is equal to the size of the first gap.

2. The light source device according to claim 1, characterized in that: The light guide plate is installed in the middle of the installation cavity, the entire side wall of the light guide plate is spaced apart from the side wall of the installation cavity, and the first gap is an annular gap arranged around the light guide plate.

3. The light source device according to claim 2, characterized in that: The shading assembly includes a first shading plate and a second shading plate, the first shading plate is vertically connected between the light guide plate and the light transparent plate, the first shading plate is spaced apart from the side wall of the mounting cavity to form the second gap, the second shading plate is arranged at one end of the second gap close to the light transparent plate, and the second shading plate is adapted to block the light emitted from the lamp bead toward the light transparent plate.

4. The light source device according to claim 3, characterized in that: The second light shielding plate is an annular light shielding plate arranged around the side of the light guide plate, and the second gap is an annular gap arranged around the light guide plate.

5. The light source device according to claim 3, characterized in that: The end of the first light shielding plate is spaced apart from the light-transmitting plate, and the second light shielding plate is sandwiched between the light-transmitting plate and the first light shielding plate.

6. The light source device according to claim 5, characterized in that: The lamp beads are installed on the bottom surface of the second shading plate.

7. The light source device according to any one of claims 1 to 6, characterized in that: The portion of the outer surface of the shading component that can be illuminated by light, and the portion of the cavity wall of the installation cavity that can be illuminated by light, are both covered with a diffuse reflection layer.

8. The light source device according to any one of claims 1 to 6, characterized in that: The light-transmitting plate is a diffusion plate.

9. A camera testing system, characterized in that: A light source device comprising any one of claims 1 to 8.

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