CN112688050A - Electronic equipment and control method thereof - Google Patents
Electronic equipment and control method thereof Download PDFInfo
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- CN112688050A CN112688050A CN202011430295.8A CN202011430295A CN112688050A CN 112688050 A CN112688050 A CN 112688050A CN 202011430295 A CN202011430295 A CN 202011430295A CN 112688050 A CN112688050 A CN 112688050A
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Abstract
The application provides an electronic device and a control method thereof, the electronic device includes: a millimeter wave radar chip; the dielectric plate is positioned on the main radiation side of the millimeter wave radar chip; the dielectric plate in the area through which the millimeter wave radar chip radiates has target thickness and target dielectric constant, so that the antenna performance and the detection angle of the millimeter wave radar chip are basically independent of a first distance, and the first distance is the distance between the millimeter wave radar chip and the dielectric plate.
Description
Technical Field
The present invention relates to the field of integrated circuit technologies, and in particular, to an electronic device and a control method thereof.
Background
Millimeter wave radars are radars that operate in the millimeter wave band (millimeter wave) for detection. Generally, the millimeter wave refers to the frequency domain (wavelength is 1mm to 10mm) of 30GHz to 300 GHz. The wavelength of the millimeter wave is between the centimeter wave and the light wave, so the millimeter wave has the advantages of microwave guidance and photoelectric guidance. Compared with the centimeter wave seeker, the millimeter wave seeker has the characteristics of small volume, light weight and high spatial resolution. Compared with optical probes such as infrared, laser and television, the millimeter wave probe has strong capability of penetrating fog, smoke and dust and has the characteristics of all weather (except heavy rainy days) all day long.
Millimeter wave radar has wide application, but cannot be directly and conveniently integrated in electronic equipment to realize application at present.
Disclosure of Invention
In view of the above, the present invention provides an electronic device, comprising:
a millimeter wave radar chip;
the dielectric plate is positioned on the main radiation side of the millimeter wave radar chip;
the dielectric plate in the area through which the millimeter wave radar chip radiates has target thickness and target dielectric constant, so that the antenna performance and the detection angle of the millimeter wave radar chip are basically independent of a first distance, and the first distance is the distance between the millimeter wave radar chip and the dielectric plate.
Preferably, the target thickness and the target dielectric constant satisfy the relationship:
wherein λ is the wavelength; c is the speed of light; f is the working frequency of the millimeter wave radar chip; epsilon is a target dielectric constant of the dielectric plate, and mu is the magnetic flux rate of the dielectric plate; the value range of the target thickness h of the dielectric plate is as follows: 0- λ, including λ, excluding 0 and λ/4.
Preferably, the dielectric plate includes a first region and a second region located outside the first region, where the first region is a region through which the millimeter wave radar chip radiates;
the first region dielectric plate has a thickness different from a thickness of the second region dielectric plate.
Preferably, the first area dielectric plate comprises a dielectric plate body and a compensation plate, the surfaces of which are tightly attached, and the second area dielectric plate comprises the dielectric plate body.
Preferably, the dielectric plate body has a first thickness and a first dielectric constant; the compensation plate comprises a second thickness and a second dielectric constant;
the first dielectric constant and the second dielectric constant are both the same as the target dielectric constant;
the sum of the first thickness and the second thickness is the target thickness.
Preferably, the dielectric plate body and the compensation plate are both glass plates with dielectric constants of 7.75F/m; the first thickness is less than or equal to 0.7mm, and the target thickness is 0.89 mm.
Preferably, at least one functional board is further included between the millimeter wave radar chip and the dielectric board;
the function board is provided with a window corresponding to a radiation passing area of the millimeter wave radar chip;
the side length of the window is W, and the side length W of the window meets the formula:
W>2*W0+WIC；
wherein, W0＝(D+h0-hoff)*tanβ；
D is the distance between the surface of the millimeter wave radar chip facing the dielectric plate and the surface of the functional plate facing the millimeter wave radar chip; beta is half of the detection angle of the millimeter wave radar chip; h is0The thickness of the millimeter wave radar chip; h isoffThe thickness of the solder paste on the substrate where the millimeter wave radar chip is located.
The invention also provides a control method of the electronic equipment, wherein the electronic equipment comprises a touch panel and a millimeter wave radar chip, and different areas of the touch panel have different functions; the millimeter wave radar chip is used for detecting the position of the operation body relative to the touch panel;
the control method comprises the following steps:
determining a region to be operated of the touch panel corresponding to the position of the operation body;
and starting the function corresponding to the area to be operated, and simultaneously closing the functions corresponding to other areas.
Preferably, each area of the touch panel is further provided with an illuminating lamp;
after determining the region to be operated of the touch panel corresponding to the position of the operation body, the control method further includes:
and illuminating lamps of the areas to be operated are lightened, and illuminating lamps of other areas are in a closed state.
Preferably, the determining the region to be operated of the touch panel corresponding to the position of the operation body specifically includes:
and when the millimeter wave radar chip detects that the distance between the operation body and the region of the touch panel is smaller than a preset threshold value, determining the corresponding region of the touch panel as the region to be operated.
According to the technical scheme, the electronic equipment comprises the millimeter wave radar chip and the dielectric plate positioned on the main radiation side of the millimeter wave radar chip, wherein the dielectric plate in the region, through which the millimeter wave radar chip radiates, of the dielectric plate has the target thickness and the target dielectric constant, after the dielectric plate with the target thickness and the target dielectric constant is comprehensively acted, the antenna performance and the detection angle of the millimeter wave radar chip can be unrelated to the first distance, and the first distance is the distance between the millimeter wave radar chip and the dielectric plate; because the first distance is irrelevant to the antenna performance and the detection angle of the millimeter wave radar chip, when the millimeter wave radar chip is installed, the distance between the millimeter wave radar chip and the dielectric plate does not need to be strictly controlled, the assembly tolerance of the millimeter wave radar chip does not need to be controlled, and then the millimeter wave radar can be directly and conveniently integrated in electronic equipment, so that the assembly of the millimeter wave radar chip can be in production line and large scale.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic cross-sectional structure diagram of an electronic device integrated with a millimeter wave radar chip provided in the prior art;
fig. 2 is a schematic cross-sectional structure diagram of an electronic device integrated with a millimeter wave radar chip according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional view of an electronic device according to an embodiment of the invention;
fig. 4 is a schematic cross-sectional structure diagram of another electronic device according to an embodiment of the invention;
fig. 5 is an exploded view of an electronic device according to the present embodiment;
FIG. 6 is a schematic cross-sectional view of the structure shown in FIG. 5;
fig. 7 is a schematic diagram illustrating a method for determining a windowing area according to an embodiment of the present invention;
fig. 8 is a flowchart of an electronic device control method according to an embodiment of the present invention;
fig. 9 is a schematic view of a touch panel of a notebook computer according to an embodiment of the present invention;
fig. 10 is a schematic view illustrating a notebook computer according to an embodiment of the present invention when detecting an operation body;
FIGS. 11-13 are schematic views of the indicator light display respectively approaching different areas to be operated;
fig. 14 is a schematic structural diagram of an apparatus for implementing the control method according to an embodiment of the present invention.
Detailed Description
As mentioned in the background section, the millimeter wave radar in the prior art is widely used, but cannot be directly and conveniently integrated into an electronic device.
The inventors found that the reason for the above phenomenon is: the antenna performance and the detection angle of the millimeter wave radar are limited by the setting position and the space of the millimeter wave radar, and the electronic equipment comprises more structures, such as a cover plate, a display panel, a touch screen and other structures, the thickness and the material of each layer of structure all affect the antenna performance of the millimeter wave radar, for example, the antenna gain of a millimeter wave radar chip, the reflection angle of a millimeter wave radar chip reflection signal to other antennas, the radiation detection angle of the millimeter wave radar chip and the like, therefore, if the millimeter wave radar chip is directly integrated in the electronic equipment without precise setting, the radiation performance of the millimeter wave radar cannot be optimally exerted, and even the millimeter wave radar cannot be used.
That is, when the millimeter wave radar is integrated in the electronic device, a plurality of problems need to be comprehensively considered, so that the millimeter wave radar cannot be directly integrated into the electronic device.
Specifically, as shown in fig. 1, a schematic cross-sectional structure diagram when the millimeter-wave radar is directly integrated into an electronic device is shown. The electronic equipment comprises a millimeter wave radar chip 01 and a cover plate 02 positioned above the millimeter wave radar chip, wherein the thickness of the cover plate 02 is t, and an air gap with the thickness of H is formed between the cover plate 02 and the millimeter wave radar chip 01; research shows that the material of the cover plate, the thickness t of the cover plate and the air gap H are mutually restricted parameters, so that the material of the cover plate, the thickness t of the cover plate and the air gap H need to be comprehensively considered when the millimeter wave radar chip is installed. This makes the assembly of the millimeter wave radar chip complicated.
Based on this, the present invention provides an electronic device comprising:
a millimeter wave radar chip;
the dielectric plate is positioned on the main radiation side of the millimeter wave radar chip;
the dielectric plate in the area through which the millimeter wave radar chip radiates has target thickness and target dielectric constant, so that the antenna performance and the detection angle of the millimeter wave radar chip are basically independent of a first distance, and the first distance is the distance between the millimeter wave radar chip and the dielectric plate.
In the electronic equipment provided by the invention, the dielectric plate is positioned on the main radiation side of the millimeter wave radar chip, wherein the dielectric plate has the target thickness and the target dielectric constant, so that the distance between the millimeter wave radar chip and the dielectric plate is irrelevant to the antenna performance and the detection angle of the millimeter wave radar chip, and the air gap between the millimeter wave radar chip and the dielectric plate can be randomly set without ensuring a specific distance, thereby reducing the whole thickness of the electronic equipment on the basis and further enabling the assembly production line of the millimeter wave radar chip.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 2, fig. 2 is a schematic cross-sectional structure diagram of an electronic device integrated with a millimeter wave radar chip according to an embodiment of the present invention; the electronic device includes a millimeter wave radar chip 10; a dielectric plate 20 located on the main radiation side of the millimeter wave radar chip 10; the dielectric plate 20 in the region through which the millimeter wave radar chip 10 radiates has a target thickness and a target dielectric constant, so that the antenna performance and the detection angle of the millimeter wave radar chip 10 are substantially independent of the first distance L, which is the distance between the millimeter wave radar chip 10 and the dielectric plate 20.
In the electronic device provided in this embodiment, the antenna performance and the detection angle of the millimeter wave radar chip 10 are basically unrelated to the first distance L, so the first distance L in this embodiment may be smaller than the distance H between the millimeter wave radar chip and the dielectric plate in the prior art, that is, L < H.
It should be noted that, in the radiation process, the millimeter wave radar chip radiates signals in directions of almost all directions in the space where the millimeter wave radar chip is located, but in the actual use process, the position and the radiation direction of the millimeter wave radar chip are set according to actual requirements, and therefore, there is a main radiation direction. For example, when the millimeter wave radar chip needs to transmit and receive signals, electromagnetic waves penetrate through the common surface of the electronic device, and the main radiation side is the side where the common surface of the electronic device of the millimeter wave radar chip is located. Specifically, taking the display surface of the electronic device as an example for explanation, the outermost surface of the electronic device is a cover plate, and the millimeter wave radar chip is disposed inside the electronic device, and when the millimeter wave radar chip transmits and receives signals, the electromagnetic wave cover plate may be regarded as that the main radiation side of the millimeter wave radar chip is the side of the cover plate opposite to the millimeter wave radar chip.
The antenna performance and the detection angle described in this embodiment are basically independent of the first distance, are not absolutely independent of the first distance, but have a smaller influence on the antenna performance and the detection angle of the millimeter wave radar chip than the first distance in the prior art, for example, the first distance slightly deviates from the H value with respect to the thickness and the material of the cover plate in the prior art, the gain of the millimeter wave radar chip is greatly changed, and the detection angle is also greatly changed; after the dielectric plate with the target thickness and the target dielectric constant is adopted, even if the first distance deviates from the H value greatly, as L < H in FIG. 2, the gain and the detection angle of the millimeter wave radar chip are changed little or not changed, and the antenna performance and the detection angle of the millimeter wave radar chip are basically unrelated to the first distance, namely the relevance or the relativity is small.
In addition, because the signal radiation is radiated to the periphery of the space by taking the millimeter wave radar chip as a reference, and the dielectric plate is arranged on one side of the millimeter wave radar chip, the specific area of the dielectric plate is not limited in this embodiment, and the area of the dielectric plate is larger than the area of the radiation surface of the millimeter wave radar chip. When the distance between the dielectric plate and the millimeter wave radar chip is short, the area of the radiation passing through the dielectric plate is relatively small; and when the distance between dielectric plate and the millimeter wave radar chip is far away, the area that the radiation passed the dielectric plate is great relatively, consequently, in the actual production process, according to the size of first distance, set up the area size of dielectric plate, as long as the dielectric plate can cover the area when millimeter wave radar chip radiates on the dielectric plate completely can.
In the embodiment of the invention, the specific material and thickness of the target thickness and the dielectric plate with the target dielectric constant are not uniquely determined, as long as the first distance has small influence on the antenna performance and the detection angle of the millimeter wave radar chip. Specifically, the determination of the target thickness h and the target dielectric constant ∈ may be determined according to equation (1):
wherein λ is the wavelength; c is the speed of light; f is the working frequency of the millimeter wave radar chip; epsilon is a target dielectric constant of the dielectric plate, and mu is the magnetic flux rate of the dielectric plate; the value range of the target thickness h of the dielectric plate is as follows: 0- λ, including λ, excluding 0 and λ/4.
After the structure of the electronic equipment is determined, the material of the dielectric plate on the main radiation side of the millimeter wave radar chip is determined, and the corresponding dielectric constant is also determined; the operating frequency of the millimeter wave radar chip is also determined, such as 60 GHz; the wavelength can be calculated through the formula (1); the inventor calculates through simulation experiments that when the value range of the target thickness h is 0-lambda, especially lambda/2 or far smaller than lambda/4 (for example smaller than lambda/8), the first distance can be any value, and has little or no influence on the antenna performance of the millimeter wave radar chip, wherein the target thickness h does not take lambda/4, so that the problem that signals received by other receiving antennas are weak or have reflection angle deviation due to the influence on the signal intensity and the reflection angle which are not monotonously changed because signals are strongly reflected on two opposite surfaces of the dielectric plate is avoided.
It should be noted that, in an actual production process, the dielectric plate and other structures of the electronic device may be disposed in a common layer, or may be disposed separately, which is not limited in this embodiment. Under the general condition, in order to guarantee the appearance consistency of the electronic equipment and reduce the interference of other layer structures to the work of the millimeter wave radar chip, the other layer structures in the radiation passing area on the main radiation side of the millimeter wave radar chip are all hollow structures, and only the cover plate on the outermost layer of the electronic equipment is of a whole layer structure. Correspondingly, the interposer in the present embodiment may be divided into a first region and a second region located outside the first region, where the first region is a radiation passing region of the millimeter wave radar chip.
Since the dielectric slab of the radiation passing region, i.e. the first region, has a target thickness, the other second region may or may not be said target thickness. Optionally, in this embodiment, the thickness of the first area dielectric plate is different from the thickness of the second area dielectric plate.
Through calculation, the optimal thickness of a glass cover plate (with the dielectric constant of 7.75F/m) corresponding to the millimeter wave radar chip working at 60GHz should be 0.89mm, namely, under the dielectric constant and the thickness, the first distance between the millimeter wave radar chip and the dielectric plate can be almost arbitrarily set, and the first distance has almost no influence on the working performance of the millimeter wave radar chip of the electronic equipment. However, if the cover plate of the whole electronic device is set to 0.89mm, the weight and thickness of the electronic device are increased, which is not in line with the trend of thinning and lightening the electronic device.
Therefore, please refer to fig. 3, in which fig. 3 is a schematic cross-sectional view of an electronic device according to an embodiment of the present invention; the electronic device in this embodiment includes a millimeter wave radar chip 10 and a dielectric plate 20 located on the main radiation side thereof, where the dielectric plate 20 includes a dielectric plate body 21 and a compensation plate 22 whose surface is closely attached to the dielectric plate body 21, and the compensation plate 22 is disposed on the surface of the dielectric plate body 21 facing the millimeter wave radar chip. That is, the dielectric plate located in the first region a includes the dielectric plate body 21 and the compensation plate 22 whose surfaces are closely attached, and the dielectric plate located in the second region B includes only the dielectric plate body 21.
The dielectric plate body 21 and the compensation plate 22 may be made of the same material or different materials, and the thicknesses of the two materials may be the same or different, which is not limited in this embodiment. For example, the dielectric plate body may be glass having a first dielectric constant and a corresponding thickness of a first thickness; the compensation plate is made of other transparent materials, such as resin, has a second dielectric constant, and has a second thickness corresponding to the second thickness, so long as the resin compensation plate located in the first area a is combined with the glass dielectric plate body, and parameters such as antenna gain and detection angle of the millimeter wave radar chip are not greatly affected by the first distance. In other embodiments of the present invention, the material and thickness of the dielectric plate body 21 and the compensation plate 22 may be in other combinations.
For an electronic device with a cover plate made of glass, such as a notebook computer or a mobile phone, the material of the optional dielectric plate body in this embodiment is glass, the material of the corresponding compensation plate is also glass, the same material has the same dielectric constant, the target thickness can be directly obtained through formula calculation, and the target thickness can be obtained through the sum of the thicknesses of the dielectric plate body and the compensation plate body, so that the material and thickness calculation of the dielectric plate body and the compensation plate is simpler and more convenient. As shown in fig. 3, the first dielectric constant and the second dielectric constant are both the same as the target dielectric constant; the sum of the first thickness h1 and the second thickness h2 is the target thickness h. Through the embodiment, the thickness of the dielectric plate body of the electronic equipment, namely the whole cover plate, can be reduced to h 1; and the final purpose is achieved by adding a compensation plate. Optionally, the dielectric plate body is made of glass with a dielectric constant of 7.75F/m, and the sum of the thicknesses of the dielectric plate body and the compensation plate, that is, the target thickness is 0.89 mm. Because the glass apron still need guarantee to carry out the purpose of protection to electronic equipment inner structure, consequently the thickness of glass apron optional is less than or equal to 0.7mm for electronic equipment's whole thickness can further reduce, realizes frivolousization when guaranteeing to play the guard action.
In addition, in other embodiments of the present invention, when the thickness of the cover plate of the electronic device is thicker, or the cover plate is formed by using other materials, and the corresponding target thickness is smaller than the thickness of the cover plate, as shown in fig. 4, fig. 4 is a schematic cross-sectional structure diagram of another electronic device provided in an embodiment of the present invention; the antenna performance and the detection angle of the millimeter wave radar chip can be made substantially independent of the first distance L by providing a groove in a region through which radiation passes on the cover plate.
In the actual production process, the electronic device further includes other functional boards, the manufacturing method is also different from the prior art, and in this embodiment, the structure shown in fig. 5 and 6 and the example in which the dielectric board includes a glass dielectric board body and a glass compensation board are taken as an example for detailed description.
As shown in fig. 5 and fig. 6, fig. 5 is an exploded schematic view of an electronic device provided in this embodiment; FIG. 6 is a schematic cross-sectional view of the structure shown in FIG. 5; the compensation plate 22 is not shown in fig. 5, but is shown in fig. 6. The electronic device comprises a millimeter wave radar chip 10 and a cover plate 20, and further comprises a base 11 for bearing the millimeter wave radar chip 10, a PCB 30 and a positioning structure layer 40 for positioning and fixing each structure inside the electronic device. The PCB 30 and the positioning structure layer 40 are both functional boards located between the millimeter wave radar chip 10 and the cover plate 20.
As shown in fig. 5, a place in the PCB 30 corresponding to the radiation passing area of the millimeter wave radar chip 10 is a first hollow area 31, and a place in the positioning structure layer 40 corresponding to the radiation passing area of the millimeter wave radar chip 10 is a second hollow area 41. The area sizes of the first hollow-out area 31 and the second hollow-out area 41 are set according to the radiation angle or the detection angle of the millimeter wave radar chip. The areas of the first hollow area 31 and the second hollow area 41 may be larger than the area of the millimeter wave radar chip 10 in a plane parallel to the cover plate 20, or may be the same as the area of the millimeter wave radar chip 10 in a plane parallel to the cover plate 20, and are set according to actual conditions. As shown in fig. 6, the compensation plate 22 is located on the lower surface of the dielectric plate 21, and both constitute a glass cover plate.
In an embodiment of the present invention, a hollow-out area, referred to as a window in this embodiment, is disposed on each functional board at a position corresponding to a radiation passing area of the millimeter wave radar chip. Referring to fig. 7, fig. 7 is a schematic diagram illustrating a method for determining a windowing area; in this embodiment, the shape of the millimeter wave radar chip is not limited, and is generally square, and the corresponding windowing shape may also be square; as shown in fig. 7, the millimeter wave radar chip 10 is fabricated on the base 11, and the base 11 is further formed on another plate 12, where the plate 12 may be a circuit board such as a PCB, which is not limited in this embodiment. The side length of the millimeter wave radar chip 10 is WIC(ii) a The thickness of the millimeter wave radar chip 10 is h0(ii) a Half of a solid angle corresponding to a radiation area of the millimeter wave radar chip 10 is β, which may also be referred to as half of a detection angle of the millimeter wave radar chip; the upper surface of the millimeter wave radar chip 10 is located below the functional board 30(40)The distance between the surfaces is a second distance D; the critical windowing side length of the functional board 30(40) is W'; the millimeter wave radar chip 10 is formed on the base 11 by soldering, taking into consideration the thickness h of the solder pasteoff(ii) a The geometric relationship can be known;
tanβ＝W0/ (2)
and, instead,
W’＝2W0+WIC (3)
therefore, W in the formula (2)0Substituting into formula (3) yields:
side length of critical windowing:
W’＝2*(D+h0-hoff)*tanβ+WIC (4)
as long as the side length W of the window is larger than the side length W' of the critical window, the detection angle of the millimeter wave radar chip can be ensured.
According to the verification of actual detection, the beta value needs to be more than 70 degrees; the side length of the millimeter wave radar chip is usually 7mm, and the thickness is 0.77 mm; the thickness of the solder paste is 0.5 mm; in this embodiment, it is preferable that the second distance between the different function boards and the millimeter wave radar chip is different, for example, the distance D between the positioning structure layer 40 and the millimeter wave radar chip40Is 2.0 mm; the side length W of the window corresponding to the positioning structure layer 4040At least:
W40＝2*(D40+h0-hoff)*tanβ+WIC＝2*(2+0.77-0.5)*2.75+7＝19.485mm；
the distance D between the PCB 30 and the millimeter wave radar chip is 3.5 mm; the side length W of the window corresponding to the PCB 3030At least:
W30＝2*(D30+h0-hoff)*tanβ+WIC＝2*(3.5+0.77-0.5)*2.75+7＝20.735mm；
for example, if other function boards are included between the millimeter wave radar chip 10 and the change board 20, the window size on the corresponding function board is calculated according to the distance between the function board and the millimeter wave radar chip.
It should be noted that although the windowing on the function board can provide a suitable detection angle for the millimeter wave radar chip, the antenna performance is satisfied; but if the windowing is large, the touch control of the electronic equipment is influenced; therefore, in order to avoid the occurrence of the touch dead zone, in this embodiment, it is optional to set the millimeter wave radar chip and the window on the corresponding function board as much as possible at the edge position of the function board. The specific position that sets up according to walking the line on the PCB board and sets up, has both satisfied the electric connection between millimeter wave radar chip and the PCB board, avoids walking on the PCB board again and leads to the fact the influence to the antenna performance of millimeter wave radar chip.
In addition, in order to avoid the problem that the touch dead zone cannot be touched, in the embodiment, the positioning result of the elastic wave sensor can be corrected in real time by compensating the positioning result of the touch sensor into the elastic wave positioning algorithm in the finger sliding process, so that the positioning accuracy of the elastic wave is improved, and the problem that the touch dead zone does not have the touch function is solved.
In the embodiment of the present invention, a manufacturing process of the electronic device may specifically include:
the local windowing is carried out on each layer structure between the cover plate and the millimeter wave radar chip, the thickness of the cover plate serving as the dielectric plate body can be 0.7mm, and according to the appearance requirement of electronic equipment, an ink layer is correspondingly arranged on the surface, facing the millimeter wave radar chip, of the glass cover plate, wherein in order to avoid the influence of the ink layer on the work of the millimeter wave radar chip, the ink material is preferably a material without metal components, and the thickness of the ink is within 50 micrometers.
A piece of white glass (as a compensation plate) with the thickness of 0.19mm is bonded on the surface of the dielectric plate body facing the millimeter wave radar chip through glass cement, the thickness of the glass cement is controlled within 100 mu m, and the white glass at least covers the whole windowing area.
The millimeter wave radar chip is fixed below the windowing area through the positioning column, and the air gap between the millimeter wave radar chip and the lower surface of the white glass with the thickness of 0.19mm, namely the first distance L is larger than 0.5mm, is ensured by considering the assembly process deviation, and can be set to be 0.7 mm.
In summary, the electronic device provided in this embodiment includes a millimeter wave radar chip and a dielectric plate located on a main radiation side of the millimeter wave radar chip, where the dielectric plate in a region where the millimeter wave radar chip radiates has a target thickness and a target dielectric constant, and after the dielectric plate of the target thickness and the target dielectric constant is used comprehensively, the antenna performance and the detection angle of the millimeter wave radar chip can be independent of a first distance, that is, the distance between the millimeter wave radar chip and the dielectric plate; because the first distance is irrelevant with the antenna performance and the detection angle of the millimeter wave radar chip, when the millimeter wave radar chip is installed, the distance between the millimeter wave radar chip and the dielectric plate does not need to be strictly controlled, the assembly tolerance of the millimeter wave radar chip does not need to be controlled, and then the millimeter wave radar can be directly and conveniently integrated in electronic equipment, the problem that the requirement on the first distance is higher when the millimeter wave radar chip is assembled is solved, and the assembly of the millimeter wave radar chip can be produced linearly and massively.
In addition, because the first distance has small correlation with the gain and the coverage area of the antenna, the adjustment of the antenna performance can be realized by adjusting the size of a metal clearance area above or around the millimeter wave radar chip. And the difference of the reflection angles of the reflection signals of the millimeter wave radar chip reaching the two or more receiving antennas can be kept monotonously increased or reduced, so that the positioning accuracy is ensured and no misoperation is caused.
Based on the same inventive concept, the embodiment of the invention also provides a control method of the electronic equipment, wherein the electronic equipment comprises a touch panel and a millimeter wave radar chip, and different areas of the touch panel have different functions; the millimeter wave radar chip is used for detecting the position of the operating body relative to the touch panel.
In this embodiment, the operation body may be a finger of a person or other parts capable of touching the electronic device; the object may be an object capable of touching the electronic device, such as a stylus or a touch glove, which is not limited in this embodiment.
As shown in fig. 8, fig. 8 is a flowchart of an electronic device control method according to an embodiment of the present invention; the control method comprises the following steps:
s101: determining a region to be operated of the touch panel corresponding to the position of the operation body;
s102: and starting the function corresponding to the area to be operated, and simultaneously closing the functions corresponding to other areas.
Touch panel includes a plurality of regions of waiting to operate in this embodiment, and every function of waiting to operate the region can be inequality to just open this part touch-control function after detecting the region of waiting to operate that the operation body corresponds through millimeter wave radar chip, and the region of operation function of other positions does not open, and then realizes multi-functional subregion, and developments multidimension is mutual, and the different functions of the regional touch-control of developments automatic setting provide the experience that the user is more intelligent.
In the present embodiment, a touch panel of a notebook computer is taken as an example for description, as shown in fig. 9, fig. 9 is a schematic view of a touch panel of a notebook computer provided in the present embodiment; the touch panel 50 includes a first to-be-operated area 51, a second to-be-operated area 52, and a third to-be-operated area 53. As shown in fig. 10, when an operation body, for example, a finger 54 of a person, approaches a certain region to be operated of the touch panel, the millimeter wave radar chip detects that an object approaches the operation body, and starts a function of the region to be operated at a corresponding position, so that a user can operate the operation body.
Specifically, when the millimeter wave radar chip detects that the distance between the operation body and the region of the touch panel is smaller than a preset threshold value, the corresponding region of the touch panel is determined as the region to be operated. In this embodiment, the operation body may be in contact with the region to be operated, or may be only close to the region, and the millimeter wave radar chip determines in advance that the user intentionally operates the function corresponding to the region.
In addition, in order to further improve user experience, each area of the touch panel in the embodiment is further provided with an illuminating lamp; after determining the region to be operated of the touch panel corresponding to the position of the operation body, the method further includes: and illuminating lamps of areas to be operated are lightened, and illuminating lamps of other areas are in a closed state.
As shown in fig. 11 to 13, the indication lamp display condition of the to-be-operated area of the touch display panel is shown when the finger approaches the first to-be-operated area 51, the second to-be-operated area 52, and the third to-be-operated area 53. Through the specific position that detects the finger, the different pilot lamps that wait to operate the region are shown in the dynamic switching to make the user carry out different operations, realize different functions.
In addition, in this embodiment, the quick operations of turning on and turning off the indicator lights in different areas can be started and switched through detected gestures or gestures such as secondary heavy pressure of the display panel. In other embodiments of the present invention, the start and the switch of the region to be operated can be realized by operating a shortcut key on the keyboard.
A hardware structure of the corresponding electronic device can be seen in fig. 14, and fig. 14 is a schematic structural diagram of an apparatus for implementing the control method according to an embodiment of the present invention; the device includes: a millimeter wave radar chip 61, a touch panel processor 62, and an indicator lamp drive circuit 63 and an indicator lamp 64. The indicator light in this embodiment may be an LED light. After the millimeter wave radar chip 61 detects that a finger approaches (or moves away from) the touch panel, a signal is transmitted to the touch panel processor 62, and then the indicator lamp driving circuit 63 is controlled to drive the indicator lamp 64 to light (or dim).
A foolproof design can be added in the embodiment, the distance and the object imaging are judged, whether the hand is close to the indicating lamp is judged, and the user is reminded of waiting for the specific function of the operation area.
In summary, according to the electronic device control method provided in this embodiment, different areas of the touch panel on the electronic device are intelligently controlled to be enabled through detection of the millimeter wave radar chip, so that the intelligent experience of the user is improved. And the switching and the display can be performed through gesture transformation, so that new interaction experience is provided for the user.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in an article or device that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An electronic device, comprising:
a millimeter wave radar chip;
the dielectric plate is positioned on the main radiation side of the millimeter wave radar chip;
the dielectric plate in the area through which the millimeter wave radar chip radiates has target thickness and target dielectric constant, so that the antenna performance and the detection angle of the millimeter wave radar chip are basically independent of a first distance, and the first distance is the distance between the millimeter wave radar chip and the dielectric plate.
2. The electronic device of claim 1, wherein the target thickness and the target dielectric constant satisfy a relationship:
wherein λ is the wavelength; c is the speed of light; f is the working frequency of the millimeter wave radar chip; epsilon is a target dielectric constant of the dielectric plate, and mu is the magnetic flux rate of the dielectric plate; the value range of the target thickness h of the dielectric plate is as follows: 0- λ, including λ, excluding 0 and λ/4.
3. The electronic device according to claim 2, wherein the dielectric plate includes a first region and a second region located outside the first region, wherein the first region is a region through which the millimeter wave radar chip radiates;
the first region dielectric plate has a thickness different from a thickness of the second region dielectric plate.
4. The electronic device of claim 3, wherein the first area dielectric plate comprises a dielectric plate body and a compensation plate with close-fitting surfaces, and the second area dielectric plate comprises the dielectric plate body.
5. The electronic device of claim 4, wherein the dielectric plate body has a first thickness and a first dielectric constant; the compensation plate comprises a second thickness and a second dielectric constant;
the first dielectric constant and the second dielectric constant are both the same as the target dielectric constant;
the sum of the first thickness and the second thickness is the target thickness.
6. The electronic device of claim 5, wherein the dielectric plate body and the compensation plate are both glass plates having a dielectric constant of 7.75F/m; the first thickness is less than or equal to 0.7mm, and the target thickness is 0.89 mm.
7. The electronic device according to any one of claims 1 to 6, wherein at least one functional board is further included between the millimeter wave radar chip and the dielectric board;
the function board is provided with a window corresponding to a radiation passing area of the millimeter wave radar chip;
the side length of the window is W, and the side length W of the window meets the formula:
W>2*W0+WIC；
wherein, W0＝(D+h0-hoff)*tanβ；
D is the distance between the surface of the millimeter wave radar chip facing the dielectric plate and the surface of the functional plate facing the millimeter wave radar chip; beta is half of the detection angle of the millimeter wave radar chip; h is0The thickness of the millimeter wave radar chip; h isoffThe thickness of the solder paste on the substrate where the millimeter wave radar chip is located.
8. The control method of the electronic equipment is characterized in that the electronic equipment comprises a touch panel and a millimeter wave radar chip, and different areas of the touch panel have different functions; the millimeter wave radar chip is used for detecting the position of the operation body relative to the touch panel;
the control method comprises the following steps:
determining a region to be operated of the touch panel corresponding to the position of the operation body;
and starting the function corresponding to the area to be operated, and simultaneously closing the functions corresponding to other areas.
9. The control method according to claim 8, wherein an illumination lamp is further provided for each area of the touch panel;
after determining the region to be operated of the touch panel corresponding to the position of the operation body, the control method further includes:
and illuminating lamps of the areas to be operated are lightened, and illuminating lamps of other areas are in a closed state.
10. The method according to claim 8, wherein the determining the region to be operated of the touch panel corresponding to the position of the operation body specifically includes:
and when the millimeter wave radar chip detects that the distance between the operation body and the region of the touch panel is smaller than a preset threshold value, determining the corresponding region of the touch panel as the region to be operated.
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