View window glass for camera
By arranging transparent electrodes and packages on the camera window glass, efficient heating and maintaining transmittance are achieved, solving the problem of fogging on the camera window, ensuring imaging quality and heating efficiency.
Patent Information
- Application Number
- CN202420121279.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-17
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-01-17
AI Technical Summary
In outdoor environments, the camera fogs on the windows due to changes in temperature differences. The existing heating technology cannot effectively heat the larger window glass, resulting in poor anti-fog effect.
Design a window glass for a camera, including a glass substrate, transparent electrodes and packages. The transparent electrode is fixed on a glass substrate for heating, and the package is coated on the outside of the transparent electrode and transmits light to ensure heating efficiency and transmittance.
By efficiently heating the glass substrate, preventing fog while maintaining a high transmittance, ensuring that the camera does not affect imaging under heating conditions and extending the service life of the transparent electrode.
Smart Images
Figure CN222531851U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of video surveillance technology, and in particular to window glass for cameras. Background Art
[0002] When the camera is used in an outdoor environment, the window will fog up when the temperature difference changes, causing the camera to not work properly. In order to prevent the window from fogging, the glass can be heated. However, considering the transmittance requirements of the window area, the heater cannot directly heat the target window area. Usually, the heating is done outside the window area. However, due to the low thermal conductivity of the glass, it is not possible to effectively heat the larger window glass to increase the temperature in the glass window area, resulting in poor anti-fogging effect. Utility Model Content
[0003] The present application provides a fog-proof window glass for a camera.
[0004] The embodiment of the present application provides a window glass for a camera, comprising:
[0005] Glass substrate;
[0006] A transparent electrode fixed on the glass substrate for heating the glass substrate;
[0007] The packaging component is coated on the outside of the transparent electrode and is light-transmissive.
[0008] Furthermore, the camera window glass comprises an anti-reflection film fixed on the glass substrate, and the transparent electrode is fixed on the anti-reflection film.
[0009] Further, the transparent electrode comprises silver paste printed on the anti-reflection film; and / or,
[0010] The package includes a highly light-transmitting silicone resin coated on the transparent electrode along the routing of the transparent electrode.
[0011] Further, the thickness H2 of the antireflection film is less than or equal to 5 um; and / or,
[0012] The width W1 of the transparent electrode is greater than or equal to 3 um and less than or equal to 20 um; and / or,
[0013] The height H3 of the transparent electrode is greater than or equal to 0.5W1 and less than or equal to 0.7W1; and / or,
[0014] The width W2 of the package is greater than the width W1 of the transparent electrode, and the height H4 of the package is greater than the height H3 of the transparent electrode.
[0015] Further, the width W2 of the package is less than or equal to 10 um; and / or,
[0016] The height H4 of the package is less than or equal to 5 um.
[0017] Furthermore, the camera window glass comprises a light-shielding layer fixed on the anti-reflection film, at least part of the transparent electrode is located in the area surrounded by the light-shielding layer, and the thickness of the light-shielding layer is greater than or equal to 0.1 mm and less than or equal to 0.2 mm.
[0018] Furthermore, one or more transparent electrodes may be provided, and along the direction from the center to the outside of the camera window glass substrate, one transparent electrode may be arranged in a bent manner from dense to sparse, or a plurality of transparent electrodes may be arranged in sequence from dense to sparse.
[0019] Furthermore, the spacing increment from dense to sparse is greater than or equal to 5% and less than or equal to 15%.
[0020] Furthermore, the camera includes a main body, the transparent electrode is electrically connected to the camera main body, the camera main body includes a shell, the shell is provided with a window, the camera window glass is located in the window, and a gap is left between the camera window glass and the inner wall of the window.
[0021] Further, the housing includes a boss extending into the window, the boss abuts against the camera window glass, and a receiving groove is formed between the boss, the camera window glass and the inner side wall of the window to receive adhesive to fix the camera window glass on the housing, and the width K1 of the gap is less than or equal to 0.1 mm; and / or,
[0022] The width K3 of the receiving groove is greater than or equal to 0.2 mm and less than or equal to 0.5 mm; and / or,
[0023] The depth H5 of the receiving groove is greater than or equal to 0.7K3 and less than or equal to 0.9K3.
[0024] The camera window glass of the embodiment of the present application arranges a transparent electrode on a glass substrate, thereby being able to efficiently heat the glass substrate and prevent the glass substrate from fogging, while still being able to maintain a relatively high transmittance, so that the camera window glass can meet the heating requirements without affecting imaging; at the same time, the encapsulation component is coated on the outside of the transparent electrode, which has an anti-oxidation effect and can prevent the transparent electrode from being corroded by water vapor and oxygen. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 is an exploded view of a window glass for a camera according to an embodiment of the present application;
[0026] Figure 2is a schematic cross-sectional view of a window glass for a camera according to an embodiment of the present application;
[0027] Figure 3 yes Figure 2 An enlarged view of the circled portion at A of the cross-sectional schematic diagram shown;
[0028] Figure 4 is an exploded view of a camera according to an embodiment of the present application;
[0029] Figure 5 yes Figure 4 The schematic cross-sectional view of the window glass of the camera after assembly shown, wherein only a portion of the camera is shown, and the dotted line indicates the window area and the area where the transparent electrode is provided;
[0030] Figure 6 yes Figure 4 Another schematic cross-sectional view of the camera shown;
[0031] Figure 7 yes Figure 6 An enlarged view of the circled portion at point B of the cross-sectional schematic diagram shown. DETAILED DESCRIPTION
[0032] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are merely examples of devices consistent with some aspects of the present application as detailed in the appended claims.
[0033] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate a quantitative limit, but indicate that there is at least one. "Multiple" or "several" means two or more. Unless otherwise specified, words such as "front", "rear", "lower" and / or "upper" are only for the convenience of explanation and are not limited to one position or one spatial orientation. Words such as "include" or "comprise" mean that the elements or objects appearing in front of "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, and can include electrical connections, whether direct or indirect. The singular forms "a", "said" and "the" used in this specification and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.
[0034] See also Figures 1 to 3 The embodiment of the present application provides a camera window glass 100, comprising: a glass substrate 1, a transparent electrode 3 and a packaging component 4. The transparent electrode 3 is fixed on the glass substrate 1 to heat the glass substrate 1, and the packaging component 4 is coated on the outside of the transparent electrode 3 and is light-transmissive.
[0035] The setting of the transparent electrode 3 can efficiently heat the glass substrate 1 and prevent the glass substrate 1 from fogging, while still maintaining a high transmittance, so that the camera window glass 100 can meet the heating requirements without affecting imaging; at the same time, the packaging component 4 is coated on the outside of the transparent electrode 3 to play an anti-oxidation effect, which can prevent the erosion of water vapor and oxygen on the transparent electrode 3, thereby extending its service life.
[0036] The glass substrate 1 is conventional glass, and its thickness H1 is determined according to the requirement of resisting external force. For example, the thickness on a conventional camera is 2 mm.
[0037] In some embodiments, the camera window glass 100 includes an anti-reflection film 2 fixed on the glass substrate 1 , and the transparent electrode 3 is fixed on the anti-reflection film 2 to increase the transmittance of the camera window glass 100 .
[0038] In some embodiments, the thickness H2 of the antireflection film 2 is less than or equal to 5 um.
[0039] In some embodiments, one or more transparent electrodes 3 may be provided, and along the direction from the center to the outside of the glass substrate 1, one transparent electrode 3 may be arranged in a bent manner from dense to sparse, or multiple transparent electrodes 3 may be arranged in sequence from dense to sparse, to ensure the uniformity of temperature after heating.
[0040] In some embodiments, the spacing increment from dense to sparse is greater than or equal to 5% and less than or equal to 15%, that is,
[0041] L2 / L1=L3 / L2 . . . =Ln / (L(n-1)), and L2 / L1 is greater than or equal to 5% and less than or equal to 15%.
[0042] In some embodiments, the antireflection film 2 is a multi-layer structure that is evaporated and deposited on the glass substrate 1 and includes at least a silicon dioxide layer and a titanium pentoxide layer. In some embodiments, the multi-layer structure is alternately stacked together.
[0043] In some embodiments, the glass substrate 1 needs to be cleaned before coating the anti-reflection film 2, for example, the glass substrate 1 is cleaned using an ion source, and then the anti-reflection film is combined with the glass substrate 1 using an evaporation deposition process, the evaporation deposition process has an ambient temperature greater than or equal to 260° C. and less than or equal to 280° C., and a time greater than or equal to 80 min and less than or equal to 100 min, preferably 90 min.
[0044] In some embodiments, the transparent electrode 3 includes silver paste printed on the anti-reflection film 2 .
[0045] In some embodiments, the main component of the transparent electrode 3 is silver paste, which can be arranged on the side of the anti-reflection film 2 away from the glass substrate 1 by printing. After printing, heat treatment is performed, the ambient temperature is greater than or equal to 300°C and less than or equal to 330°C, the time is greater than or equal to 80 minutes and less than or equal to 100 minutes, preferably 90 minutes. In addition, this step needs to control the environmental cleanliness to Class 1000 or above.
[0046] In some embodiments, the width W1 of the transparent electrode 3 is greater than or equal to 3 um and less than or equal to 20 um. The smaller the width, the higher the transmittance and the smaller the impact on imaging, but the higher the process requirements and the higher the cost of the finished product. Considering the transmittance and cost, the width W1 of the transparent electrode 3 is preferably 5 um.
[0047] In some embodiments, the height H3 of the transparent electrode 3 is greater than or equal to 0.5W1 and less than or equal to 0.7W1. Since the silver paste has fluidity during the layout process, the height H3 of the transparent electrode 3 is closely related to the fluidity of the silver paste. The higher the height H3 of the transparent electrode 3, the larger the cross-sectional area of a single transparent electrode 3. It can be seen from the following formula that the corresponding unit length resistance is lower.
[0048] R=ρL / S
[0049] S≈W1*H3
[0050] Wherein, R is the resistance of a single transparent electrode 3 , ρ is the resistivity of the silver paste, L is the length of a single transparent electrode 3 , and S is the cross-sectional area of a single transparent electrode 3 .
[0051] In some embodiments, the encapsulation member 4 includes a highly light-transmitting silicone resin coated on the transparent electrode 3 along the routing of the transparent electrode 3 .
[0052] In some embodiments, the width W2 of the package 4 is greater than the width W1 of the transparent electrode 3, and the height H4 of the package 4 is greater than the height H3 of the transparent electrode 3. The greater the width of the package 4, the greater the effect on transmittance.
[0053] In some embodiments, the width W2 of the package 4 is less than or equal to 10 um.
[0054] In some embodiments, the height H4 of the package 4 is less than or equal to 5 um.
[0055] In some embodiments, the main function of the package 4 is to protect the transparent electrode 3 and prevent it from oxidation and fracture. In some embodiments, the package 4 covers the transparent electrode 3 by non-contact same-path coating, that is, a highly light-transmitting silicone resin is coated along the routing of the transparent electrode 3 to cover the transparent electrode 3, and after coating the package 4, a heat treatment is performed, the ambient temperature is greater than or equal to 150°C and less than or equal to 170°C, the time is greater than or equal to 80min and less than or equal to 100min, preferably 90min, and in addition, this step needs to control the environmental cleanliness to Class 1000 or above.
[0056] In some embodiments, the camera window glass 100 includes a shading layer 5 fixed on the anti-reflection film 2, at least part of the transparent electrode 3 is located in the area surrounded by the shading layer 5, and the thickness of the shading layer 5 is greater than or equal to 0.1 mm and less than or equal to 0.2 mm to prevent light leakage.
[0057] In some embodiments, the light shielding layer 5 is a black oil layer.
[0058] See also Figures 4 to 7 The embodiment of the present application provides a camera, including a camera body 6 and the camera window glass 100, wherein the camera window glass 100 is fixed to the camera body 6. The camera body 6 includes a lens 60 located behind the camera window glass 100 for imaging.
[0059] In some embodiments, the transparent electrode 3 is electrically connected to the camera body 6 to supply power to the transparent electrode 3. The power supply voltage of the present application is set to 12V, which can be adjusted according to actual needs, and the present application does not restrict the power supply voltage.
[0060] In some implementations, the transparent electrode 3 is plug-in connected to the camera body 6 via a connecting line 61 to facilitate assembly and disassembly.
[0061] In some embodiments, the transparent electrode 3 may also be powered by an external power source.
[0062] The camera body 6 includes a shell 62, and the shell 62 is provided with a window 621. The camera window glass 100 is located in the window 621. A gap 622 is left between the camera window glass 100 and the inner wall of the window 621 to prevent the camera window glass 100 from transferring heat to the shell 62 when in contact with the shell 62.
[0063] In some embodiments, the width K1 of the gap 622 is less than or equal to 0.1 mm. When the width K1 is too large, there will be obvious gaps, resulting in waterproof problems. When the width K1 is too small, heat is easily transferred to the housing 62 .
[0064] The housing 62 includes a boss 623 extending into the window 621 , the boss 623 abuts against the camera window glass 100 , and a receiving groove 624 is formed between the boss 623 , the camera window glass 100 and the inner wall to receive adhesive to fix the camera window glass 100 on the housing 62 .
[0065] In some embodiments, the boss 623 is tightly sealed to the camera window glass 100 to prevent water.
[0066] In some embodiments, the width K2 of the boss 623 is greater than or equal to 0.5 mm, so as to ensure good contact between the glass 100 and the housing 62. However, the larger the width K2 of the boss 623 is, the more heat is transferred from the camera window glass 100 to the housing 62, which will reduce the heating efficiency. Preferably, the width K2 of the boss 623 is equal to 0.5 mm.
[0067] In some embodiments, the surface of the boss 623 in contact with the camera window glass 100 is partially roughened to increase the contact heat transfer thermal resistance, and the roughness Ra is greater than or equal to 3.2 um and less than or equal to 12.5 um, which helps to reduce the heat transferred to the housing 62.
[0068] In some embodiments, the width K3 of the receiving groove 624 is greater than or equal to 0.2 mm and less than or equal to 0.5 mm to control the amount of glue dispensed.
[0069] In some embodiments, the depth H5 of the receiving groove 624 is greater than or equal to 0.7K3 and less than or equal to 0.9K3 to control the amount of glue dispensed.
[0070] The length of the area of the camera window glass 100 where the transparent electrode 3 is arranged is defined as N, and the width is defined as M. The length of the window area of the camera window glass 100 is defined as N1, and the width is defined as M1. The difference between N and N1 is greater than or equal to 2 mm, and the difference between M and M1 is greater than or equal to 2 mm. In some embodiments, the positive and negative electrodes of the transparent electrode 3 are arranged outside the window area, and the present application does not limit the positions of the positive and negative electrodes of the transparent electrode 3.
[0071] In some embodiments, if there are multiple transparent electrodes 3 connected in parallel, each outgoing line needs to be gathered at the positive and negative electrode regions to avoid the transparent electrodes 3 from crossing during wiring.
[0072] The shading layer 5 is applied on the side of the antireflection film 2 facing away from the glass substrate 1 , except for the area where the transparent electrode 3 and the packaging component 4 are arranged, for shading. The wiring of the transparent electrode 3 outside the area is arranged between the antireflection film 2 and the shading layer 5 .
[0073] The camera window glass 100 of the present application can directly heat the window area while still maintaining a relatively high transmittance, and can effectively solve the problem of fogging of the camera window affecting imaging; at the same time, it has high heating efficiency and good practical value.
[0074] The above is only a preferred implementation mode of the present application, and does not constitute any form of limitation to the present application. Although the present application has been disclosed as a preferred implementation mode as above, it is not used to limit the present application. Any technician familiar with this profession can make some changes or modify the technical contents disclosed above into equivalent implementation modes without departing from the scope of the technical solution of the present application. However, any simple modification, equivalent change and modification made to the above implementation modes based on the technical essence of the present application without departing from the content of the technical solution of the present application still fall within the scope of the technical solution of the present application.
Claims
1. A window glass for a camera, characterized in that: include: Glass substrate; an antireflection film fixed on the glass substrate; A transparent electrode fixed on the anti-reflection film for heating the glass substrate; The packaging component is coated on the outside of the transparent electrode and is light-transmissive.
2. The camera window glass according to claim 1, wherein: The transparent electrode comprises a silver paste printed on the anti-reflection film; and / or, The package includes a highly light-transmitting silicone resin coated on the transparent electrode along the routing of the transparent electrode.
3. The camera window glass according to claim 2, wherein: The thickness H2 of the antireflection film is less than or equal to 5 um; and / or, The width W1 of the transparent electrode is greater than or equal to 3 um and less than or equal to 20 um; and / or, The height H3 of the transparent electrode is greater than or equal to 0.5W1 and less than or equal to 0.7W1; and / or, The width W2 of the package is greater than the width W1 of the transparent electrode, and the height H4 of the package is greater than the height H3 of the transparent electrode.
4. The camera window glass according to claim 3, characterized in that: The width W2 of the package is less than or equal to 10um; and / or, The height H4 of the package is less than or equal to 5 um.
5. The camera window glass according to claim 1, wherein: The camera window glass comprises a light shielding layer fixed on the anti-reflection film, at least part of the transparent electrode is located in the area surrounded by the light shielding layer, and the thickness of the light shielding layer is greater than or equal to 0.1 mm and less than or equal to 0.2 mm.
6. The camera window glass according to claim 1, wherein: One or more transparent electrodes may be provided. Along the direction from the center to the outside of the glass substrate, one transparent electrode may be arranged in a bending manner from dense to sparse, or a plurality of transparent electrodes may be arranged in sequence from dense to sparse.
7. The camera window glass according to claim 6, wherein: The spacing increment from dense to sparse is greater than or equal to 5% and less than or equal to 15%.
8. The camera window glass according to any one of claims 1 to 7, characterized in that: The camera comprises a camera body, the transparent electrode is electrically connected to the camera body, the camera body comprises a shell, the shell is provided with a window, the camera window glass is located in the window, and a gap is left between the camera window glass and the inner wall of the window.
9. The camera window glass according to claim 8, characterized in that: The housing includes a boss extending into the window, the boss abuts against the camera window glass, and a receiving groove is formed between the boss, the camera window glass and the inner side wall of the window to receive adhesive to fix the camera window glass on the housing, and the width K1 of the gap is less than or equal to 0.1 mm; and / or, The width K3 of the receiving groove is greater than or equal to 0.2 mm and less than or equal to 0.5 mm; and / or, The depth H5 of the receiving groove is greater than or equal to 0.7K3 and less than or equal to 0.9K3.