JP2013239900A - Portable terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a portable terminal compact, while bringing the position of illumination keys on a touch panel as close as possible to the display area of a display.SOLUTION: Illumination keys 8 are provided within an operable range of a touch panel on the outside of display area 5a of an LCD 5. An LED 10 is mounted on the outside of the illumination keys 8, when viewed from the front face, on a main substrate arranged on the back side of the LCD 5. On the front face side of the LED 10, a light guide body 11 for leading light from the LED 10 to the illumination keys 8 is provided.

Description

  The present invention relates to a portable terminal having a touch panel and a display display disposed on the back side of the touch panel.

  2. Description of the Related Art Conventionally, it has been known to illuminate an illumination key fixed outside a display area of a liquid crystal display in a touch panel of a mobile phone, which is a typical mobile terminal (see, for example, Patent Documents 1 and 2).

  In this type of portable terminal, a flexible substrate on which an LED is mounted is disposed directly below an illumination key, and is illuminated directly or indirectly using a light guide sheet. Also, as shown in FIGS. 10 and 11, a light guide 111 is disposed between the illumination key 108 and the LED 110 mounted on the main board 109 just below the illumination key 108 to illuminate directly above. It is also known.

JP 2002-269056 A JP 2000-311512 A

  However, in the conventional portable terminal, since the gap s between the glass surface of the liquid crystal display 105 and the glass back surface of the touch panel 106 with the illumination key 108 is only about 0.2 mm, the light guide 111 is inserted into the slight gap s. I can't.

  For this reason, as shown in FIG. 10, when the illumination key 108 is arranged on the connection side of the flexible substrate 115 of the liquid crystal display 105, the driver chip in which the illumination key 108 is mounted on the liquid crystal flexible substrate 115 from the display area of the liquid crystal display 105. 105b and the flexible substrate 115 need to be arranged in a region A that is separated from the connection area. For this reason, there is a problem that the display area B of the liquid crystal display 105 and the position of the illumination key 108 are separated from each other, and the movement distance of the line of sight becomes long and the operability is difficult.

  On the other hand, as shown in FIG. 11, when the illumination key 108 is arranged on the side opposite to the connection side of the flexible substrate 115, the distance between the display area B of the liquid crystal display 105 and the illumination key 108 can be reduced. By arranging 111 side by side with the liquid crystal display 105, there is a problem in that it is difficult to reduce the size of the portable terminal because an additional region C for arranging the flexible substrate 115 is required.

  The present invention has been made in view of this point, and an object of the present invention is to make the portable terminal compact while bringing the position of the illumination key on the touch panel as close as possible to the display area of the display.

  In order to achieve the above object, in the present invention, a device is added to the arrangement of the light guide for guiding light to the illumination key on the touch panel.

  Specifically, the first invention is based on a portable terminal having a touch panel and a display arranged on the back side of the touch panel.

And the mobile terminal
An illumination key provided outside the display area of the display and within the operable range of the touch panel;
On the main board arranged on the back side of the display, a light emitting unit mounted outside the illumination key as viewed from the front,
A light guide disposed on the front side of the light emitting unit and guiding light from the light emitting unit to the illumination key;
When viewed from the front, at least a part of the illumination key overlaps the display.

  According to said structure, since the light from a light emission part can be guide | induced to an illumination key from places other than right below by providing a light guide, an illumination key can also be arrange | positioned right above a display display. For this reason, it is easy to operate the touch panel even in a dark place by illuminating the illumination key without increasing the size of the portable terminal.

In the second invention, in the first invention,
The display is affixed to the back of the touch panel and is housed in a display housing recess provided in the mobile terminal body,
The main board is disposed on the back side of the display housing recess,
The light guide is provided on a wall that forms the display housing recess.

  According to the above configuration, since the display display is affixed to the back surface of the touch panel, it is not necessary to fix the display display to the display housing concave portion, and the light guide can be arranged on the wall portion constituting the display housing concave portion. became. For this reason, a space that is not effectively utilized can be used, and the size of the mobile terminal can be reduced.

In the third invention, in the first or second invention,
A touch panel flexible substrate for connecting the touch panel and the main substrate is provided on the back of the touch panel,
A display flexible substrate that connects the display display and the main substrate is provided on the back of the display.
The said light guide is comprised so that the light from the said light emission part may be guide | induced to the clearance gap between the said display flexible substrate surface and the said touch panel flexible substrate back surface.

  According to said structure, the light from a light emission part can be guide | induced to an illumination key with a light guide in the slight clearance gap between a display flexible substrate surface and a touchscreen back surface.

In a fourth invention, in any one of the first to third inventions,
The illumination key is disposed on the front side of a driver that drives the display.

  According to the above configuration, since the driver is arranged outside the display area of the display display, the illumination key can be brought as close to the display area as possible by providing the illumination key in front of the driver. For this reason, the size of the mobile terminal does not increase, and the moving distance of the line of sight does not increase.

  As described above, according to the present invention, the light guide that guides the light from the light emitting unit to the illumination key provided outside the display area of the display display and within the operable range of the touch panel on the front side of the light emitting unit. By providing the portable terminal, the position of the illumination key on the touch panel can be made as close as possible to the display area of the display.

It is a perspective view which shows the outline of a mode that a light guide guides to an illumination key. It is a front view which shows a mobile telephone. It is the III-III sectional view taken on the line of FIG. 2 when a rear cover is removed. It is a front view which shows a mobile telephone when a touch panel is removed. It is the disassembled perspective view which looked at the mobile telephone without a rear cover from the front side. FIG. 6 is a view corresponding to FIG. 5 viewed from the back side. FIG. 7 is an enlarged sectional view of a portion VII in FIG. 3. It is the expansion perspective view which looked at the light guide from the back. It is the expansion perspective view which looked at the light guide from the front. It is sectional drawing which shows the prior art by which LED was arrange | positioned at the display flexible substrate side. It is sectional drawing which shows the prior art by which LED is arrange | positioned on the opposite side to a display flexible substrate.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 to 6 show a mobile phone 1 as a mobile terminal according to an embodiment of the present invention. The mobile phone 1 has a mobile terminal body 2 having a rectangular plate shape. As shown in FIG. 5, the mobile terminal body 2 has a rectangular plate-shaped metal frame 3 made of a stainless steel plate or the like, and the metal frame 3 cooperates with a resin portion covering the periphery of the metal frame 3 on the front side. A display housing recess 4 is formed.

  A rectangular LCD (liquid crystal display) 5 serving as a display display is accommodated on the front side of the display accommodating recess 4. The LCD 5 is attached to the back side of the touch panel 6 that covers the front side of the mobile terminal body 2. The display display may be an organic EL display. The touch panel 6 is fitted into a panel recess 7 provided at the periphery of the display housing recess 4 on the front side of the mobile terminal body 2, and forms a surface having the same height as the periphery of the panel recess 7.

  For example, three illumination keys 8 are provided outside the display area 5 a of the LCD 5 and within the operable range 6 a of the touch panel 6. Since the illumination key 8 is outside the display area 5a of the LCD 5, it is not illuminated by a backlight (not shown) of the LCD 5. For this reason, especially in a dark place, a means for illuminating these illumination keys 8 is required. As shown in FIG. 7, the illumination key 8 is disposed on the front side of a driver 5 b including an electronic circuit that drives the LCD 5. Since the driver 5b is disposed outside the display area 5a of the LCD 5, by providing the illumination key 8 directly in front of the driver 5b, the illumination key 8 can be brought as close to the display area 5a as possible.

  On the back side of the LCD 5, specifically on the back side of the metal frame 3, a main substrate 9 on which electronic components of the mobile phone 1 are arranged is provided. On the front side of the main board 9, three LEDs 10 as light emitting units are provided outside the illumination key 8 when viewed from the front (lower side when viewed from the front).

  A light guide 11 that guides the light from the LED 10 to the illumination key 8 is provided on the front side of the LED 10. Specifically, the light guide 11 is fitted into the light guide housing 12 that is recessed in the upper side wall 4 a of the display housing recess 4. As shown in FIG. 5, the light guide housing portion 12 has three light guide holes 13 corresponding to the respective LEDs 10. For example, the light guide 11 is affixed to the light guide housing portion 12 with a double-sided tape 16 or the like. Since the LCD 5 is attached to the back surface of the touch panel 6, it is not necessary to fix the LCD 5 to the display housing recess 4, and the light guide 11 can be disposed on the upper side wall portion 4 a.

  As shown in an enlarged view in FIGS. 8 and 9, for example, the light guide 11 has three light guide portions 11 a protruding from the back surface side of the bar-like portion with a space therebetween. This light guide part 11a is inserted in the light guide hole 13 and plays the role of reliably guiding the light from the LED 10 to the touch panel 6 side. A chamfer 11b is formed at the corner of the light guide 11 opposite to the LCD 5, and the light guided by the light guide 11a is reflected by the back surface (inner surface) of the chamfer 11b and guided to the LCD 5 side. It has come to be.

  On the other hand, as shown in FIG. 6, a touch panel flexible substrate 14 that electrically connects the touch panel 6 and the main substrate 9 is provided on the back surface of the touch panel 6. A display flexible substrate 15 that electrically connects the LCD 5 and the main substrate 9 is provided on the back surface of the LCD 5. The touch panel flexible substrate 14 and the display flexible substrate 15 are accommodated in a flexible housing recess 4b that is overlapped with the LCD 5 attached to the back surface of the touch panel 6 and folded on the back side of the LCD 5 to be recessed in the display housing recess 4. It has become so.

  As shown in FIG. 7, a part of the light guide 11 is disposed in a gap between the surface of the display flexible substrate 15 and the back surface of the touch panel flexible substrate 14.

  With this configuration, the light from the LED 10 is guided to the illumination key 8 by the light guide 11 in a slight gap between the front surface of the display flexible substrate 15 and the back surface of the touch panel flexible substrate 14. For this reason, the illumination key 8 can be disposed right above the LCD 5, and the distance of movement of the line of sight between the illumination key 8 and the display area 5a is not increased, and illumination is performed without increasing the size of the mobile phone 1. The touch panel 6 can be easily operated even in a dark place with the key 8 illuminated.

  Therefore, according to the mobile phone 1 according to the present embodiment, the light from the LED 10 is guided to the illumination key 8 provided outside the display area 5a of the LCD 5 and within the operable range 6a of the touch panel 6 on the front side of the LED 10. By providing the body 11, the cellular phone 1 can be made compact while the position of the illumination key 8 on the touch panel 6 is as close as possible to the display area 5 a of the LCD 5.

(Other embodiments)
The present invention may be configured as follows with respect to the above embodiment.

  That is, in the said embodiment, although three LED10 was provided according to the number of the illumination keys 8, the number is not limited, One or two may be sufficient and four or more may be sufficient. Moreover, what is necessary is just to change the shape of the light guide 11 according to the number of LED10.

  In the above embodiment, the mobile phone 1 is the mobile phone 1, but if it has the LCD 5 and the touch panel 6, a PHS (Personal Handy-phone System), a PDA (Personal Digital Assistant), a smartphone, a personal computer, a mobile tool An electronic dictionary, a calculator, a game machine, or the like may be used.

  In addition, the above embodiment is an essentially preferable illustration, Comprising: It does not intend restrict | limiting the range of this invention, its application thing, or a use.

  As described above, the present invention is useful for a mobile terminal such as a mobile phone having a touch panel and a display display disposed on the back side of the touch panel.

1 Mobile phone (mobile terminal)
2 Mobile device body
3 Metal frame
4 Display housing recess
4a Upper side wall
4b Flexible housing recess
5 LCD
5a Display area
5b driver
6 Touch panel
6a Operating range
7 Panel recess
8 Illumination key
9 Main board
10 LED
11 Light guide
11a Light guide
12 Light guide housing part
13 Light guide hole
14 Touch panel flexible substrate
15 Display flexible substrate
16 Double-sided tape

Claims (4)

In a mobile terminal having a touch panel and a display arranged on the back side of the touch panel,
An illumination key provided outside the display area of the display and within the operable range of the touch panel;
On the main board arranged on the back side of the display, a light emitting unit mounted outside the illumination key as viewed from the front,
A light guide disposed on the front side of the light emitting unit and guiding light from the light emitting unit to the illumination key;
A portable terminal characterized in that at least a part of an illumination key overlaps the display when viewed from the front. The mobile terminal according to claim 1,
The display is affixed to the back of the touch panel and is housed in a display housing recess provided in the mobile terminal body,
The main board is disposed on the back side of the display housing recess,
The mobile terminal according to claim 1, wherein the light guide is provided on a wall portion constituting the display housing recess. The mobile terminal according to claim 1 or 2,
A touch panel flexible substrate for connecting the touch panel and the main substrate is provided on the back of the touch panel,
A display flexible substrate that connects the display display and the main substrate is provided on the back of the display.
The portable terminal, wherein the light guide is configured to guide light from the light emitting unit to a gap between the display flexible substrate surface and the back surface of the touch panel flexible substrate. The mobile terminal according to any one of claims 1 to 3,
The portable terminal, wherein the illumination key is disposed on a front side of a driver that drives the display.

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