Planar light source device
By setting up multiple fluorescent lamps and mixed light chambers in a planar light source device, the problem of not being able to provide discontinuous spectrum in the prior art is solved, and the uniformization of light and the provision of multi-spectrality are achieved, which improves the user experience and versatility.
Patent Information
- Application Number
- CN202422366241.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-09-26
AI Technical Summary
Existing planar light source devices can only provide continuous spectrum and cannot meet the requirements of different ISP products for discontinuous spectrum.
A plurality of fluorescent lamps are arranged in a planar light source device, and the mixing and homogenization of light rays is achieved through the mixing cavity and the diffusion sheet to provide a discontinuous spectrum.
The planar light source device can provide discontinuous spectrum, improve brightness and color uniformity, and enhance user experience and versatility.
Smart Images
Figure CN223258024U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of light source technology, and in particular to a planar light source device. Background Art
[0002] In the field of camera effect adjustment, planar light sources are generally used to adjust brightness uniformity and color uniformity indicators, and as backlights for transmissive charts, to adjust indicators such as dynamic range, white balance, and color error. Because the response characteristics of photosensitive chips to light of different spectra are different, certain indicators (especially color-related indicators) require that the planar light source can provide light sources with multiple typical spectra. Different ISP (Image Signal Process) products require different types of light sources. In related technologies, planar light source devices use tungsten filament lamps and LED lamps as light sources. For tungsten filament lamps, different filters are used to filter out or reduce light in different frequency bands to change the spectrum. Since LED lamps and tungsten filament lamps produce continuous spectra, the planar light source device can only provide a continuous light source and cannot provide a discontinuous spectrum light source. Utility Model Content
[0003] In order to solve the above technical problems, the present application provides a planar light source device for providing a discontinuous spectrum.
[0004] The present application provides a planar light source device, which includes: a device body, the device body having a mixing light cavity, the mixing light cavity having a first light inlet, a second light inlet and a light outlet, the first light inlet and the second light inlet being located on opposite sides of the light outlet, and a first diffuser being provided at the light outlet. A first box body, a plurality of first fluorescent lamps being provided in the first box body, the first box body having a first opening, the first opening being opposite to the first light inlet. A second box body, a plurality of first fluorescent lamps being provided in the second box body, the second box body having a second opening, the second opening being opposite to the second light inlet.
[0005] The technical solution provided by the embodiments of the present application has the following advantages over the prior art: by disposing multiple first fluorescent lamps within the first and second housings, light emitted by the first fluorescent lamps can enter the light mixing cavity through the first and second light inlets. The mixed light is then emitted through the first diffuser, thereby enabling the planar light source device to provide a non-continuous spectrum light source for testing. Furthermore, the light mixing cavity and the first diffuser make the emitted light more uniform, thereby improving the user experience of the planar light source device.
[0006] In one possible implementation, the planar light source device further includes a plurality of second fluorescent lamps, and the plurality of second fluorescent lamps are arranged alternately with the plurality of first fluorescent lamps.
[0007] In one possible implementation, a first switch and a second switch are provided on an outer side wall of the device body. The first switch is electrically connected to the first fluorescent lamp, and the second switch is electrically connected to the second fluorescent lamp.
[0008] In a possible implementation, the planar light source device further includes a second diffuser and a third diffuser, the second diffuser is disposed at the first opening, and the third diffuser is disposed at the second opening.
[0009] In a possible implementation manner, the light mixing cavity is coated with white matte paint.
[0010] In a possible implementation, the first box and the second box are both coated with white matte paint.
[0011] In a possible implementation, the planar light source device further includes a snap-in component, which is disposed on the device body and located on one side of the light outlet, and is used to fix the transmissive card.
[0012] In a possible implementation, two opposite sides of the light outlet are provided with a clamping member, the clamping member has a clamping slot, and the clamping slot is used to fix the transmissive card.
[0013] In a possible implementation, the planar light source device further includes a handle, and storage grooves are provided on two opposite sides of the device body, and the handle is rotatably disposed in the storage groove.
[0014] In one possible implementation, the planar light source device further includes a controller, which is disposed in the device body and is configured to control the brightness of the first fluorescent lamp. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.
[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0017] Figure 1 A cross-sectional view of a planar light source device provided in some embodiments of the present application;
[0018] Figure 2 Schematic diagram of a planar light source device provided in some other embodiments of the present application.
[0019] Reference numerals:
[0020] 100. Plane light source device;
[0021] 1. Device body; 11. Light mixing cavity; 111. First light inlet; 112. Second light inlet; 113. Light outlet; 1131. First diffuser; 12. First switch; 13. Second switch; 14. Connector; 15. Handle;
[0022] 2. First housing; 21. First opening; 22. Second diffuser;
[0023] 3. Second housing; 31. Second opening; 32. Third diffuser;
[0024] 4. First fluorescent lamp;
[0025] 5. Second fluorescent lamp. DETAILED DESCRIPTION
[0026] In order to more clearly understand the above-mentioned objectives, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.
[0027] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "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, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0028] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed connection" means that the two are connected to each other and the relative position relationship after connection remains unchanged. In addition, the directional terms mentioned in the embodiments of the present application, such as "inside" and "outside", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.
[0029] In the description of the embodiments of the present application, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element limited by the statement "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In the absence of further restrictions, an element limited by the statement "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.
[0030] A planar light source device is a special light source device in which light can be emitted from a larger light-emitting surface, and the brightness difference between different areas of the light-emitting surface is small.
[0031] In the field of camera effect adjustment, planar light sources are used to adjust brightness uniformity and color uniformity indicators, and as backlights for transmissive charts, to adjust indicators such as dynamic range, white balance, and color error. Because the response characteristics of photosensitive chips to light of different spectra are different, certain indicators (especially color-related indicators) require that the planar light source can provide light sources with multiple typical spectra. Different ISP (Image Signal Process) products require different types of light sources. In related technologies, planar light source devices use tungsten filament lamps and LED lamps as light sources. For tungsten filament lamps, different filters are used to filter out or reduce light in different frequency bands to change the spectrum. Since LED lamps and tungsten filament lamps produce continuous spectra, the planar light source device can only provide a continuous light source and cannot provide a discontinuous spectrum light source.
[0032] In order to solve the above technical problems, the present application provides a planar light source device.
[0033] See also Figure 1 and Figure 2 , Figure 1 A cross-sectional view of a planar light source device provided in some embodiments of the present application, Figure 2 Schematic diagram of a planar light source device according to some other embodiments of the present application. The planar light source device 100 may include a device body 1 , a first housing 2 , and a second housing 3 .
[0034] The device body 1 may include a light mixing cavity 11. The light mixing cavity 11 may include a first light inlet 111, a second light inlet 112, and a light outlet 113. The first light inlet 111 and the second light inlet 112 are located on opposite sides of the light outlet 113. Thus, light entering through the first light inlet 111 and the second light inlet 112 can be mixed within the light mixing cavity 11. The mixed light is then emitted through the light outlet 113, thereby ensuring uniform light output.
[0035] Exemplarily, the first light inlet 111 and the second light inlet 112 may be located at the left and right sides of the light mixing cavity 11 , and the light outlet 113 may be located at one of the front and back sides of the light mixing cavity 11 .
[0036] A first diffusion sheet 1131 may be provided at the light outlet 113 , so that the light passing through the first diffusion sheet 1131 can be uniformized, thereby ensuring the uniformity of light emitted by the planar light source device 100 .
[0037] Multiple first fluorescent lamps 4 may be provided within the first housing 2, and the multiple first fluorescent lamps 4 may be spaced apart within the first housing 2. The first fluorescent lamps 4 may provide a non-continuous spectrum. The first fluorescent lamps 4 may be fixedly connected to the first housing 2, thereby improving the stability of the connection between the first fluorescent lamps 4 and the first housing 2. The first fluorescent lamps 4 may also be detachably connected to the first housing 2, thereby facilitating replacement of the first fluorescent lamps 4 and improving the maintainability of the planar light source device 100.
[0038] Exemplarily, the first fluorescent lamp 4 may be a TL84 fluorescent lamp.
[0039] The first housing 2 may have a first opening 21 , and the first opening 21 may be opposite to the first light inlet 111 , so that light emitted by the first fluorescent lamp 4 may be emitted from the first opening 21 toward the first light inlet 111 , thereby entering the light mixing cavity 11 .
[0040] Multiple first fluorescent lamps 4 are disposed within the second housing 3. The multiple first fluorescent lamps 4 can be spaced apart within the second housing 3. The first fluorescent lamps 4 can be fixedly connected to the second housing 3, thereby improving the stability of the connection between the first fluorescent lamps 4 and the second housing 3. The first fluorescent lamps 4 can also be detachably connected to the second housing 3, thereby facilitating replacement of the first fluorescent lamps 4 and improving the maintainability of the planar light source device 100.
[0041] The second housing 3 has a second opening 31 , which is opposite to the second light inlet 112 , so that light emitted by the first fluorescent lamp 4 can be emitted from the second opening 31 toward the second light inlet 112 and enter the light mixing cavity 11 .
[0042] It should be noted that when it is necessary to test the brightness uniformity or color uniformity index, the camera can be directly facing and close to the light outlet 113 to shoot. The distance between the camera and the light outlet 113 can be 1-2 cm.
[0043] According to the planar light source device 100 of the present application, by disposing multiple first fluorescent lamps 4 within the first housing 2 and the second housing 3, light emitted by the first fluorescent lamps 4 can enter the light mixing cavity 11 through the first light inlet 111 and the second light inlet 112. The mixed light is then emitted through the first diffuser 1131, thereby enabling the planar light source device 100 to provide a non-continuous spectrum light source for testing. Furthermore, the light mixing cavity 11 and the first diffuser 1131 make the emitted light more uniform, thereby improving the user experience of the planar light source device 100.
[0044] Please continue reading Figure 1 and Figure 2 In some embodiments, the planar light source device 100 may further include a plurality of second fluorescent lamps 5. The plurality of second fluorescent lamps 5 are interleaved with the plurality of first fluorescent lamps 4. That is, a second fluorescent lamp 5 may be positioned between two first fluorescent lamps 4. This arrangement enables the planar light source device 100 to provide light sources with different discontinuous spectra, thereby improving the versatility of the planar light source device 100. Furthermore, the interleaved arrangement of the first and second fluorescent lamps 4, 5 ensures uniform light output, thereby improving the light output effect of the planar light source device 100.
[0045] Exemplarily, the second fluorescent lamp 5 may be a CWF fluorescent lamp light source.
[0046] It should be noted that the first box 2 and the second box 3 may also include other types of fluorescent lamps, and this application does not impose any limitation on this.
[0047] Please continue reading Figure 1 In some embodiments, a first switch 12 and a second switch 13 may be provided on the outer wall of the device body 1. The first switch 12 is electrically connected to the first fluorescent lamp 4, and the second switch 13 is electrically connected to the second fluorescent lamp 5. Thus, the first and second fluorescent lamps 4 and 5 can be independently controlled by the first and second switches 12 and 13, thereby improving the safety of the planar light source device 100. Furthermore, the placement of the first and second switches 12 and 13 on the outer wall facilitates user access, thereby improving the user experience.
[0048] Please continue reading Figure 1 and Figure 2In some embodiments, the planar light source device 100 may further include a second diffuser 22 and a third diffuser 32. The second diffuser 22 is disposed at the first opening 21. The third diffuser 32 is disposed at the second opening 31. Specifically, the second diffuser 22 may be connected to the first housing 2 by bonding, and the third diffuser 32 may be connected to the second housing 3 by adhesive. The orthographic projection of the second diffuser 22 on the plane where the first light inlet 111 is located overlaps with the first light inlet 111, and the orthographic projection of the third diffuser 32 on the plane where the second light inlet 112 is located overlaps with the second light inlet 112.
[0049] Therefore, the light emitted by the first fluorescent lamp 4 can be homogenized for the first time after passing through the second diffuser 22 and the third diffuser 32, and then mixed in the light mixing cavity 11. The mixed light is homogenized again after passing through the second diffuser 22, so that a uniform light intensity can be formed on the light outlet 113.
[0050] Please continue reading Figure 1 and Figure 2 In some embodiments, the light mixing cavity 11 is coated with white matte paint. This allows the light entering the light mixing cavity 11 to be diffusely reflected and mixed, thereby further improving the uniformity of light mixing and further facilitating the improvement of the uniformity of light output from the planar light source device 100.
[0051] Please continue reading Figure 1 and Figure 2 In some embodiments, the first housing 2 and the second housing 3 are both coated with white matte paint. Thus, the light emitted by the first fluorescent lamp 4 can be uniformed in the first housing 2 and the second housing 3, thereby further improving the uniformity of the light emitted by the planar light source device 100.
[0052] Please continue reading Figure 1 and Figure 2 In some embodiments, the planar light source device 100 may further include a clip 14. The clip 14 may be disposed on the device body 1 and may be located on one side of the light outlet 113. The clip 14 is used to secure a transmission card. Specifically, the transmission card is detachably connected to the clip 14. When the transmission card is connected to the clip 14, the transmission card may cover the light outlet 113. If the test indicator requires the use of a transmission card, the transmission card is connected to the clip 14 and the first fluorescent lamp 4 is turned on to take a picture.
[0053] Therefore, the transmission card can be easily disassembled and connected, thereby facilitating the use convenience of the planar light source device 100 .
[0054] Please continue reading Figure 1 and Figure 2In some embodiments, a clamping member 14 is provided on opposite sides of the light outlet 113. The clamping member 14 may include a slot. The slot is used to secure the transmissive card. The slot secures the transmissive card in a simple manner, thereby reducing the difficulty of assembling the transmissive card.
[0055] Please continue reading Figure 1 and Figure 2 In some embodiments, the planar light source device 100 may further include a handle 15. Receiving slots are provided on opposite sides of the device body 1. The handle 15 is rotatably disposed within the receiving slots. The provision of the handle 15 facilitates the user's handling of the planar light source device 100. The provision of the receiving slots facilitates the storage of the handle 15, thereby reducing the risk of bumps and collisions.
[0056] Please continue reading Figure 1 and Figure 2 In some embodiments, the planar light source device 100 may further include a controller. The controller may be disposed within the device body 1 and configured to control the brightness of the first fluorescent lamp 4. This allows the planar light source device 100 to provide varying brightness levels, thereby improving the versatility of the planar light source device 100.
[0057] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.
[0058] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.
Claims
1. A planar light source device, characterized in that: The planar light source device comprises: A device body, the device body having a light mixing cavity, the light mixing cavity having a first light inlet, a second light inlet, and a light outlet, the first light inlet and the second light inlet being located on opposite sides of the light outlet, and a first diffuser being provided at the light outlet; a first box body, wherein a plurality of first fluorescent lamps are disposed in the first box body, and the first box body has a first opening, and the first opening is directly opposite to the first light inlet; A second box body is provided with a plurality of the first fluorescent lamps, and the second box body has a second opening, and the second opening is directly opposite to the second light inlet.
2. The planar light source device according to claim 1, wherein: The planar light source device further includes a plurality of second fluorescent lamps, which are arranged alternately with the plurality of first fluorescent lamps.
3. The planar light source device according to claim 2, wherein: A first switch and a second switch are provided on the outer side wall of the device body. The first switch is electrically connected to the first fluorescent lamp, and the second switch is electrically connected to the second fluorescent lamp.
4. The planar light source device according to claim 1, wherein: The planar light source device further includes a second diffusion sheet and a third diffusion sheet. The second diffusion sheet is disposed at the first opening, and the third diffusion sheet is disposed at the second opening.
5. The planar light source device according to claim 1, wherein: The light mixing cavity is coated with white matte paint.
6. The planar light source device according to claim 5, characterized in that: The first box body and the second box body are both coated with the white matte paint.
7. The planar light source device according to claim 1, wherein: The planar light source device further comprises a clamping member, which is arranged on the device body and located at one side of the light outlet, and is used to fix the transmission card.
8. The planar light source device according to claim 7, wherein: The clamping parts are provided on two opposite sides of the light outlet. The clamping parts have a clamping slot, and the clamping slot is used to fix the transmissive card.
9. The planar light source device according to claim 1, wherein: The planar light source device further includes a handle. Two opposite sides of the device body are provided with storage grooves, and the handle is rotatably arranged in the storage grooves.
10. The planar light source device according to claim 1, wherein: The planar light source device further includes a controller, which is disposed in the device body and is used to control the brightness of the first fluorescent lamp.