Periscope head heat energy management system, periscope head and mobile phone

Abstract

The utility model discloses a periscope head heat energy management system, a periscope head and a mobile phone, the periscope head heat energy management system comprises a reflecting prism, the outer side of the reflecting surface of the reflecting prism is provided with a contact layer used for absorbing the heat of the reflecting prism; a heat conduction layer is arranged on the outer side of the contact layer and used for guiding absorbed heat to the edge of the periscope head. A heat dissipation layer is arranged on the outer side of the heat conduction layer and used for increasing the heat dissipation area. According to the periscope head heat energy management system, the periscope head and the mobile phone provided by the utility model, heat management can be performed on the periscope head by utilizing the contact layer, the heat conduction layer and the heat dissipation layer which are arranged on the outer side of the reflecting surface of the reflecting prism, so that thermal expansion and optical path offset caused by temperature change of the reflecting prism are compensated.

Description

TECHNICAL FIELD

[0001] The utility model relates to periscopic lens technical field, especially periscopic lens heat energy management system, periscopic lens and cell phone. BACKGROUND

[0002] With the continuous development of mobile phone technology, smart phones have evolved from single communication tools to integrated terminals integrating social entertainment, image creation and intelligent perception. Among them, the image function as the core module of user experience has become a key indicator for consumers to select and purchase equipment. The traditional upright lens is difficult to realize long focal length optical design due to physical size limitation, and the periscopic lens greatly compresses the module thickness through folding light path, becoming the mainstream scheme to realize more than 5 times optical zoom. Its core structure includes incident lens group, reflecting prism, relay lens group and image sensor, and the total length of light path can reach 3-5 times of the traditional lens, significantly improving the telephoto capability.

[0003] The reflecting prism in the periscopic lens is usually made of BK7 optical glass or resin composite material, and its linear expansion coefficient is between 7.1×10^-6 / K (glass) and 70×10^-6 / K (high polymer material). When the environmental temperature changes more than ±15℃, the prism with a typical size (8×8×5mm) will produce a linear deformation of 1.5-15μm. This micron-level displacement is amplified through the leverage effect of the prism, which can cause an equivalent optical axis offset of 30-300μm at the light path turning point, far exceeding the tolerance range of CMOS sensor pixel size (1-2μm).

[0004] In the prior art, the prism thermal expansion problem caused by temperature change is mainly compensated by the following ways:

[0005] 1. Using ultra-low expansion glass (CTE <0.03×10^-6 / K) can reduce temperature drift by two orders of magnitude, but the material cost increases by 30 times and the processing yield is less than 40%. At the same time, its density is higher than that of conventional glass, affecting the lightweight of the equipment.

[0006] 2. The bimetallic strip compensator can offset 50-70% of the expansion displacement, but introduces an additional thickness of 0.5mm; the flexible hinge structure can absorb stress, but it causes the prism group resonance frequency to drop below 200Hz, which cannot meet the OIS anti-shake requirement.

[0007] 3. The closed-loop control scheme integrating micro-peltier element and temperature sensor can control the prism temperature fluctuation within ±1.5℃. But the system power consumption reaches 300mW, which will accelerate the battery consumption in continuous video shooting scenes and cause a local temperature rise of 2-3℃. UTILITY MODEL CONTENTS

[0008] The utility model provides to solve the technical problem that the utility model provides a periscope lens thermal energy management system, periscope lens and cell -phone can utilize the contact layer, heat conducting layer and heat dissipation layer set up in the outside of the reflection prism reflection surface, carry out the thermal management to periscope lens to the heat expansion and light path deviation of reflection prism due to temperature change are compensated.

[0009] One of the technical schemes adopted by the utility model is to provide a periscope lens thermal energy management system, the periscope lens includes a reflection prism, the outside of the reflection surface of the reflection prism is provided with a contact layer for absorbing the heat of the reflection prism, the outside of the contact layer is provided with a heat conducting layer for guiding the absorbed heat to the edge of the periscope lens, and the outside of the heat conducting layer is provided with a heat dissipation layer for increasing the heat dissipation area.

[0010] Further, the outside surface of the reflection surface of the reflection prism is provided with a first thermistor array for detecting the temperature of the reflection surface of the reflection prism.

[0011] Further, the contact layer is a graphene heat conducting film, the graphene heat conducting film can completely cover the outside of the reflection surface of the reflection prism, so as to increase the contact area of the contact layer and the reflection surface of the reflection prism.

[0012] Further, the graphene heat conducting film is embedded with a second thermistor array for detecting the temperature of the graphene heat conducting film.

[0013] Further, the heat conducting layer is a micro pulsating heat pipe, the graphene heat conducting film can completely cover the micro pulsating heat pipe, the micro pulsating heat pipe includes an evaporation section and a condensation section, the evaporation section is arranged at the heat generation area of the graphene heat conducting film for absorbing the heat generated on the graphene heat conducting film, and the condensation section is arranged at the edge of the graphene heat conducting film for guiding the heat to the edge of the graphene heat conducting film.

[0014] Further, temperature sensors are arranged in the evaporation section and the condensation section of the micro pulsating heat pipe for detecting the temperature of the evaporation section and the condensation section.

[0015] Further, the heat dissipation layer is a heat dissipation fin, the heat dissipation fin can completely cover the micro pulsating heat pipe, so as to increase the contact area between the heat dissipation fin and the micro pulsating heat pipe.

[0016] Further, the heat dissipation fin is a corrugated aluminum alloy heat dissipation fin, so as to increase the convection heat dissipation area between the heat dissipation fin and air.

[0017] The utility model provides a periscope lens, the periscope lens adopts the thermal energy management system of any one of the above.

[0018] The third aspect of the utility model further provides a mobile phone which adopts the periscope lens.

[0019] The periscope lens thermal energy management system has the following beneficial effects: the heat transfer model of the contact layer-heat conduction layer-heat dissipation layer-external air is constructed to increase the heat dissipation efficiency of the reflection prism, thereby compensating for the light path deviation of the reflection prism caused by thermal expansion, and further improving the overall imaging quality of the periscope camera module. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings, which are included to provide a further understanding of the application and constitute a part of this application, illustrate certain illustrative embodiments of the application and together with the description serve to explain the application. In the drawings:

[0021] Figure 1 The structure diagram of the periscope lens thermal energy management system of the embodiment of the utility model.

[0022] Figure 2 The structure diagram of the periscope lens thermal energy management system of the embodiment of the utility model.

[0023] Figure 3 The structure diagram of another embodiment of the periscope lens thermal energy management system of the utility model.

[0024] Explanation of reference signs:

[0025] Reflection prism-1; graphene heat conduction film-2; micro pulsating heat pipe-3; corrugated aluminum alloy heat dissipation fin-4; contact layer-200; heat conduction layer-300; heat dissipation layer-400. DETAILED DESCRIPTION

[0026] The utility model will be further described below in combination with the drawings.

[0027] Please refer to Figure 1A structure block diagram of an embodiment of the periscopic lens thermal energy management system.The periscopic lens thermal energy management system is different from the setting of the reflecting prism 1-lens group-imaging unit of the conventional long-focus periscopic lens module, a contact layer 200 is arranged outside the reflecting surface of the reflecting prism 1 and used for absorbing the heat of the reflecting prism 1, a heat conduction layer 300 is arranged outside the contact layer 200 and used for guiding the absorbed heat to the edge of the periscopic lens, and a heat dissipation layer 400 is arranged outside the heat conduction layer 300 and used for increasing the heat dissipation area.The heat management of the periscopic lens is realized by the triple regulation of the contact layer 200-heat conduction layer 300-heat dissipation layer 400, and the heat transfer between the above layers and the external air and the heat dissipation layer 400 is the basis of the whole thermal energy management, therefore, it is crucial to build the heat transfer model of the contact layer 200-heat conduction layer 300-heat dissipation layer 400-external air, which can provide intermediate parameters for the subsequent thermal expansion and optical path offset calculation.

[0028] In some embodiments, the outer surface of the reflecting surface of the reflecting prism 1 is provided with a first thermistor array for detecting the temperature of the reflecting surface of the reflecting prism 1.The temperature of the reflecting prism 1 in the present scheme can be detected by the first thermistor array, which can select a high-precision NTC thermistor (error ±0.1℃), and the first thermistor array can be directly arranged outside the reflecting surface of the reflecting prism 1, so as to accurately measure the temperature of the reflecting surface without affecting the optical path.

[0029] In some embodiments, the contact layer 200 in the present scheme can be provided as a graphene heat conduction film 2, that is, a nanometer graphene heat conduction film 2 (heat conduction coefficient > 1500W / m·K) covering the outside of the reflecting surface of the reflecting prism 1, which can quickly absorb the heat generated by the reflecting prism 1.In addition, the area of the graphene heat conduction film 2 can be set to completely cover the outside of the reflecting surface of the reflecting prism 1, so as to increase the contact area of the contact layer 200 and the reflecting surface of the reflecting prism 1, and further increase the heat absorption efficiency of the contact layer 200 to the reflecting surface.

[0030] In some embodiments, a second thermistor array can be embedded in the graphene heat conduction film 2, so as to facilitate temperature detection of the graphene heat conduction film 2, and the second thermistor array can also select a high-precision NTC thermistor (error ±0.1℃).

[0031] Please refer to Figure 2As a structure schematic view of one embodiment of the heat energy management system of the periscope lens, the heat conduction layer 300 can be provided as a micro pulsating heat pipe 3, which drives the working medium to circulate and flow by using capillary force, and directs heat to the edge of the module, and specifically, the micro pulsating heat pipe 3 can include an evaporation section and a condensation section, wherein the evaporation section absorbs heat by using evaporation of the working medium, and the steam formed by evaporation of the working medium is liquefied at a lower temperature and releases heat when passing through the condensation section, that is, the heat can be directed from the evaporation section to the condensation section by circulation of evaporation and condensation of the working medium, and therefore the evaporation section of the micro pulsating heat pipe 3 can be provided at a region with higher heat on the graphene heat conduction film 2, and the condensation section can be provided at an edge position of the graphene heat conduction film 2, so as to direct heat to the edge of the system. In addition, in order to detect the temperature of the evaporation section and the condensation section in real time, temperature sensors can be provided in the evaporation section and the condensation section.

[0032] In some embodiments, the heat dissipation layer 400 can be provided as a heat dissipation fin, and the area of the heat dissipation fin can be set to be able to completely cover the micro pulsating heat pipe 3 described above, so as to increase the contact area with the micro pulsating heat pipe 3 and the heat dissipation area with air, so as to increase the efficiency of discharging heat by air convection. In addition, the heat dissipation fin can be provided as a corrugated aluminum alloy heat dissipation fin 4, so as to further increase the convection heat dissipation area between the heat dissipation layer 400 and air, thereby increasing the heat dissipation efficiency.

[0033] Please refer to Figure 3 In order to further increase the heat dissipation efficiency, the graphene heat conduction film 2 can be provided to be able to completely cover the reflecting surface of the reflecting prism 1, and extend from one side of the reflecting surface by a distance, and similarly, the micro pulsating heat pipe 3 and the corrugated aluminum alloy heat dissipation fin 4 can also extend from one side of the reflecting surface by a distance, and such arrangement can enable the evaporation section of the micro pulsating heat pipe 3 to be located at the heat generating region of the graphene heat conduction film 2, and the condensation section to be located outside the entire reflecting prism 1, so as to be able to directly guide heat from the graphene heat conduction film 2 to outside the reflecting prism 1, and further to be able to eliminate the edge thermal deformation of the reflecting prism 1 caused by the heat being directed to the edge of the system in the above embodiment.

[0034] The utility model also provides a periscope lens, including lens, reflecting prism 1 and image sensor, this periscope lens adopts heat energy management system as any one of the above described embodiment.

[0035] The utility model also provides a mobile phone, and the mobile phone adopts the periscope lens in the above described embodiment.

[0036] The scheme increases the heat dissipation efficiency of the reflection prism by constructing a heat transfer model of the contact layer 200-heat conduction layer 300-heat dissipation layer 400-external air, so that the light path deviation of the reflection prism caused by thermal expansion can be compensated, and the overall imaging quality of the periscopic camera module is improved.

[0037] The above only expresses the preferred embodiments of the utility model, the description is more specific and detailed, but can not therefore be understood as the restriction of the utility model patent range. It should be pointed out that for ordinary skilled in the art, without departing from the utility model concept, can also make a number of deformation and improvement, these belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be based on the appended claims.

Claims

1. A periscope head thermal energy management system, characterized by, The outer side of the reflecting surface of the reflecting prism is provided with a contact layer for absorbing heat of the reflecting prism; the outer side of the contact layer is provided with a heat conduction layer for conducting the absorbed heat to the edge of the periscope lens; the outer side of the heat conduction layer is provided with a heat dissipation layer for increasing the heat dissipation area.

2. The periscopic lens thermal management system of claim 1, wherein, The outer side surface of the reflecting surface of the reflecting prism is provided with a first thermistor array for detecting the temperature of the reflecting surface of the reflecting prism.

3. The periscopic lens thermal management system of claim 2, wherein, The contact layer is a graphene heat conduction film which can completely cover the outer side of the reflecting surface of the reflecting prism, thereby increasing the contact area between the contact layer and the reflecting surface of the reflecting prism.

4. The periscopic lens thermal management system of claim 3, wherein, The graphene heat conduction film is embedded with a second thermistor array for detecting the temperature of the graphene heat conduction film.

5. The periscopic lens thermal management system of claim 3, wherein, The heat conduction layer is a micro pulsating heat pipe, the graphene heat conduction film can completely cover the micro pulsating heat pipe, the micro pulsating heat pipe includes an evaporation section and a condensation section, the evaporation section is arranged at the heat generating area of the graphene heat conduction film for absorbing heat generated on the graphene heat conduction film, and the condensation section is arranged at the edge of the graphene heat conduction film for conducting heat to the edge of the graphene heat conduction film.

6. The periscopic lens thermal management system of claim 5, wherein, Temperature sensors are arranged in the evaporation section and the condensation section of the micro pulsating heat pipe for detecting the temperature of the evaporation section and the condensation section.

7. The periscopic lens thermal management system of claim 6, wherein, The heat dissipation layer is a heat dissipation fin which can completely cover the micro pulsating heat pipe, thereby increasing the contact area between the heat dissipation fin and the micro pulsating heat pipe.

8. The periscopic lens thermal management system of claim 7, wherein, The heat dissipation fin is a corrugated aluminum alloy heat dissipation fin, thereby increasing the convective heat dissipation area with air.

9. A periscopic lens characterized by, The periscope lens adopts the thermal energy management system according to any one of claims 1-7.

10. A handset, comprising: The mobile phone adopts the periscope lens according to claim 8.

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