JP2015079399A - Electronic equipment and housing structure of electronic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thin-enclosure electronic device with a touch panel, configured to ensure excellent antenna characteristics.SOLUTION: An electronic device includes: a touch panel; a display module arranged on the back side of the touch panel; an antenna arranged at least one side of an outer periphery of a display surface of the display module; a non-conductive antenna cover for protecting the antenna; and a thin enclosure having a back part formed of light metal on the back side of the display module at least. The touch panel is arranged so as not to overlap a radio wave emission surface of the antenna at least.

Description

  The present invention relates to an electronic device and a housing structure of the electronic device.

  In recent years, portable computers such as notebook personal computers (hereinafter referred to as notebook PCs) have been equipped with antennas for wireless communication as standard. The antenna for wireless communication is often arranged on the upper side of the liquid crystal display so that the sensitivity of the antenna is best when the user uses the notebook PC.

  In recent years, light metal such as aluminum-based alloys and magnesium-based alloys are often used in notebook PC casings in order to reduce the thickness and weight while maintaining the strength of the casing. Is the same.

  By the way, when the antenna disposed on the upper side of the liquid crystal display is disposed inside the liquid crystal display casing formed of the above-described conductive material such as metal, the sensitivity is lowered. Therefore, a structure in which a part corresponding to the antenna of the liquid crystal display housing is cut out and the cut out part is covered with a nonconductive resin or the like is common.

  With respect to the above, Patent Document 1 discloses a technique for covering an antenna region with glass fiber reinforced resin (GFRP) which is a non-conductive material in order to obtain good antenna characteristics.

  On the other hand, in recent years, a touch panel mounted on a smartphone (multifunctional mobile phone) has been adopted for a notebook PC. In a touch panel, a capacitance method is generally used in which a touch position is specified by detecting a change in capacitance generated in an electrode at a close portion when a finger is brought close to the surface of a sensor panel to be mounted. In recent years, OGS (One Glass Solutions) in which a cover glass and a sensor are integrated has been adopted from the viewpoint of reduction in thickness and weight in a capacitive touch panel (see Non-Patent Document 1).

JP 2011-165206 A

“Survey Results 2013 on Capacitance Touch Panels and Components Market” September 27, 2013 Internet Search URL http://www.yano.co.jp/press/pdf/1117.pdf

  By the way, when a touch panel adopting OGS as described above is mounted on a liquid crystal display housing, it is necessary to consider the influence on the characteristics of the mounted antenna. This is because a glass material such as OGS generally has a property of not allowing radio waves to pass through, and thus has a negative effect on antenna characteristics.

  On the other hand, when the touch panel is arranged on the display, it is desirable that the entire display is covered with the touch panel from the viewpoint of design and operability. If the entire surface of the display is covered with a touch panel, the entire surface will be flat, creating a design effect that looks good, and the fingers that operate the touch panel can be moved smoothly to the corners of the display, improving operability. To improve.

  However, if the entire surface of the display is covered with a touch panel such as OGS, as described above, the antenna characteristics of the antenna built in the display housing will be negatively affected. If the conventional electronic device has a relatively thick casing and a space inside, it is possible to achieve compatibility without affecting the antenna characteristics by temporarily separating the antenna from the touch panel in the internal space. However, when the casing has a thin structure, there is almost no internal space for separating the antenna from the touch panel, and as a result, the antenna and the touch panel are brought close to each other, resulting in a problem in the antenna characteristics.

  Accordingly, an object of the present invention is to ensure good antenna characteristics in an electronic device having a thin casing employing a touch panel.

  In order to solve the above problems, an information processing apparatus according to the present invention protects a touch panel, a display module provided on the back side of the touch panel, an antenna provided on at least one side of the outer periphery of the display module display surface, and the antenna. A non-conductive antenna cover and a thin casing having at least the back side of the display module made of light metal, and a touch panel is disposed so as not to overlap at least the radio wave radiation surface of the antenna. To do.

  ADVANTAGE OF THE INVENTION According to this invention, a favorable antenna characteristic is securable in the electronic device of the thin housing | casing which employ | adopted the touch panel.

It is the schematic of the electronic device in embodiment of this invention. FIG. 2 is an enlarged view of a portion A surrounded by a broken line in FIG. 1. It is CC sectional drawing in FIG. It is the schematic diagram which showed the example which changed the distance of an antenna and a touchscreen in B part enclosed with the broken line in FIG. 5 is a chart comparing antenna characteristics (gains) when the distance between the antenna and the touch panel in FIG. 4 (direction parallel to the display surface) is changed. 5 is a chart comparing antenna characteristics (gain) values when the distance between the antenna and the touch panel in FIG. 4 (depth direction from the display surface to the back of the housing) is changed. It is a modification in embodiment of this invention.

  An electronic apparatus according to an embodiment of the present invention will be described below with reference to the drawings. In addition, in each figure, the same code | symbol is attached | subjected to the part which is the same or it corresponds, The duplication description is simplified thru | or abbreviate | omitted suitably.

  A schematic configuration of a notebook PC 1 that corresponds to the electronic device of the present embodiment and includes the casing structure of the electronic device of the present embodiment will be described with reference to FIGS. 1 to 3. In addition, about electronic components, such as CPU and a motherboard mounted in an electronic device, the description is abbreviate | omitted except the display, antenna, and wireless module which are mentioned later. FIG. 2 is an enlarged view of a portion A surrounded by a broken line in FIG. FIG. 3 is a cross-sectional view taken along the line CC in FIG.

  In the notebook PC 1 of the present embodiment, a housing 2 provided with a display and a housing 3 provided with a keyboard or the like are rotatably connected via a hinge portion. The housing 2 includes a back surface portion 4 made of a light metal such as magnesium alloy on the back surface side of the display module 28, a surface portion 5 that faces the back surface portion 4, and a side surface portion 6 that rises from the four outer edges of the back surface portion 4. It is configured to be connected to the outer periphery. The back surface portion 4 includes a metal portion 27 made of a light metal such as magnesium alloy, and a non-conductive (for example, resin) antenna cover 26 that protects the back surface of the antenna 22. In addition, you may comprise a back surface part with the electroconductive material with which the same rigidity as the light metal used by this embodiment was ensured.

  Each antenna corresponds to a communication system such as Bluetooth (registered trademark), wireless LAN, wireless WAN, WiMAX, UWB, or GPS, or a mobile phone system such as 3G or 3.5G.

  The front surface portion 5 is provided with a touch panel 7 in which glass on which a touch sensor is formed is integrally attached to a liquid crystal panel. As a method for forming the touch sensor on the glass, for example, there is a method of directly attaching the touch sensor to the glass, or a method of vapor-depositing the touch sensor on the glass, and an example of adopting the latter method is an OGS method. The touch panel 7 is provided so as not to overlap the radio wave radiation surface on the surface side of the antenna 22, that is, avoiding the radio wave radiation surface of the antenna 22. This is because if the touch panel 7 covers the radio wave radiation surface of the antenna 22, good antenna gain cannot be obtained as described later.

  Further, a display module 28 is provided on the back side of the touch panel 7, and an antenna 22 is provided on one side above the display surface of the display module 28 on both sides of the one side. The surface side of the antenna 22 is covered with a non-conductive (for example, resin) antenna cover 25. The antenna 22 and the wireless module 29 built in the housing 2 are connected by a cable 30.

  Further, a camera 23 and a microphone 24 are provided near the upper center of the housing 2, and a lens portion of the camera 23 and a collection of microphones 24 are provided on the antenna cover 25 corresponding to the portions where the camera 23 and the microphone 24 are provided. A processing hole for exposing the sound part is provided.

  As shown in FIG. 3, the touch panel 7 and the antenna cover 25 are provided so that the boundary between the surface of the touch panel 7 and the surface of the antenna cover 25 is flat. As a result, when the user operates the touch panel 7 with a finger (for example, swipe), compared with the case where there is a step at the boundary, the finger is much smoother and the operability is improved. It is done.

  Next, a desirable distance between the antenna 22 and the touch panel 7 in the present embodiment will be described with reference to FIGS. 4 (a-1) and 4 (a-2) are a schematic diagram and a cross-sectional view showing a case where the distance in the direction along the display surface of the antenna 22 and the touch panel 7 is 5 mm. is there. 4 (b-1) and 4 (b-2) are a schematic diagram showing a case where the distance in the direction along the display surface of the antenna 22 and the touch panel 7 is set to 2.3 mm and a cross section thereof. FIG. FIGS. 4C-1 and 4C-2 are a schematic view and a cross-sectional view showing a case where the touch panel 7 covers the surface side of the antenna 22.

  Corresponding to the examples of the three schematic views and the cross-sectional views of FIG. 4, the results of measuring the absolute gain (dBi) as the antenna characteristics will be described with reference to FIG. When the touch panel 7 is not provided, the measured value is -2.99 dBi in the frequency range of 2400 to 2500 MHz and -3.95 dB in the frequency range of 5150 to 5850 MHz. Further, it is assumed that the recommended value is −3.00 dBi at a frequency of 2400 to 2500 MHz band and −4.40 dBi at a frequency of 5150 to 5850 MHz band.

  First, in FIG. 4A-1 and FIG. 4A-2, the absolute gain when the distance in the direction parallel to the display surface of the antenna 22 and the touch panel 7 is 5 mm is 2400 to 2500 MHz band. The frequency was −3.57 dBi at the frequency of −4.97 dBi at the frequency of 5150 to 5850 MHz.

  Moreover, the absolute gain when the distance in the direction along the display module display surface of the antenna 22 and the touch panel 7 in FIG. 4 (b-1) and FIG. 4 (b-2) is 2.3 mm is It was -3.97 dBi in the frequency range of 2400 to 2500 MHz, and -5.19 dBi in the frequency range of 5150 to 5850 MHz.

  Furthermore, the absolute gain when the touch panel 7 covers the surface side of the antenna 22 in FIGS. 4C-1 and 4C-2 is −4.65 dBi at a frequency of 2400 to 2500 MHz. It was −5.98 dBi in the frequency band of 5150 to 5850 MHz.

  From the above, in the case of FIGS. 4A-1 and 4A-2 where the distance in the direction along the display surface of the antenna 22 and the touch panel 7 is the longest, the best gain is obtained. You can see that That is, in order to obtain a good antenna gain, it is desirable to adjust the distance X in the direction parallel to the display surface of the antenna 22 and the touch panel 7 within the range of 2.3 ≦ X ≦ 5.0. .

  Next, the transition of the antenna gain when the distance Y in the direction perpendicular to the display module display surface between the antenna 22 and the touch panel 7 is changed (see FIG. 4C-2) will be described with reference to FIG. As in FIG. 5, the recommended value is −3.00 dBi at frequencies of 2400 to 2500 MHz and −4.40 dBi at frequencies of 5150 to 5850 MHz. When the distance Y was 1.2 mm, the absolute gain was −3.90 dBi at frequencies of 2400 to 2500 MHz and −4.85 dBi at frequencies of 5150 to 5850 MHz.

  When the distance Y was 2.0 mm, the absolute gain was −3.67 dBi at frequencies of 2400 to 2500 MHz and −4.30 dBi at frequencies of 5150 to 5850 MHz.

  Further, the absolute gain when the distance Y was 3.0 mm was −3.11 dBi at frequencies of 2400 to 2500 MHz and −3.95 dBi at frequencies of 5150 to 5850 MHz.

  As described above, it can be seen that the longer the distance between the antenna 22 and the touch panel 7 in the direction perpendicular to the display module display surface, the better the antenna gain can be obtained. However, since the electronic device in the present embodiment is a product reflecting the thinning, it is necessary to set the distance Y without sacrificing the thinning. Therefore, it is desirable to adjust the distance Y within a range of 1.2 mm ≦ Y ≦ 3.0 mm.

  Next, a modification of the present embodiment will be described with reference to FIG. Here, the antenna covers 25 and 26 are provided so as to cover the radio wave radiation surface of the antenna 22, and one side (for example, the side surface portion 6) of the housing 2 where the antenna 22 is not provided is connected to the outer periphery of the back surface portion 4. Form with. Since at least the radio wave radiation surface of the antenna 22 does not have to be blocked, it is not necessary to cover all the upper and lower surfaces of the housing 2 with the antenna cover as in the above-described embodiment. Only the portion 251 may be covered with the antenna cover. Thereby, if parts other than an antenna cover are comprised with rigid members, such as a light metal, the intensity | strength of a housing | casing can be aimed at.

  Each of the above-described embodiments is a preferred embodiment of the present invention, and various modifications can be made without departing from the scope of the present invention. For example, in the present embodiment, a notebook PC has been described as an example. However, the present invention is not limited to a notebook PC. For example, a mobile terminal such as a mobile phone or a smartphone, a photographing device with a display panel such as a digital camera, or a display panel It can also be applied to household appliances with a mark.

1 Notebook PC
2 Display-side housing 3 Keyboard-side housing 4 Back surface portion 5 Front surface portion 6 Side surface portion 7 Touch panel 22 Antenna 23 Camera 24 Microphone 25 Front surface side antenna cover 26 Back surface side antenna cover 27 Metal portion 28 Display module 29 Wireless module 30 cables

Claims (6)

A touch panel;
A display module provided on the back side of the touch panel;
An antenna provided on at least one side of the outer periphery of the display module display surface;
A non-conductive antenna cover protecting the antenna;
A thin casing having at least the back side of the display module made of a light metal; and
With
An electronic apparatus, wherein the touch panel is disposed so as not to overlap at least a radio wave radiation surface of the antenna.   2. The electronic device according to claim 1, wherein a distance X between a side of the touch panel near the antenna and the antenna in a direction parallel to the display module display surface is 2.3 mm ≦ X ≦ 5.0 mm. machine.   3. The electronic apparatus according to claim 1, wherein a distance Y between a rear surface of the touch panel and the antenna in a direction perpendicular to the display module display surface satisfies 1.2 mm ≦ Y ≦ 3.0 mm.   The said antenna cover is provided so that the electromagnetic wave radiation surface of the said antenna may be covered, and the part in which the said antenna in the said thin housing | casing is not provided consists of light metals, The any one of Claim 1 to 3 characterized by the above-mentioned. Electronic equipment.   5. The electronic device according to claim 1, wherein the touch panel and the antenna cover are provided so that a boundary between the surface of the touch panel and the surface of the antenna cover is flat. A housing structure of an electronic device comprising a touch panel, a display module provided on the back side of the touch panel, and an antenna provided on at least one side of the outer periphery of the display module display surface,
At least the back side of the display module is a back part made of light metal, and the side of the display module is made of light metal rising from the outer periphery of the back part,
A non-conductive antenna cover that protects the antenna is provided in a part of the side where the antenna is provided and is cut out.
A housing structure of an electronic device, wherein the touch panel is disposed so as not to overlap at least a radio wave radiation surface of the antenna.

Images