JP3094091U - Display device for mobile phone and mobile phone - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a mobile phone that can also be used as a mirror. SOLUTION: In a liquid crystal display device for a mobile phone comprising a light transmitting panel, a color filter, a transparent electrode, a liquid crystal layer, a polarizing plate and a backlight, which form the surface of a display screen, there is a gap between the polarizing plate 21 and the backlight 28. And a semi-transparent mirror layer 26 that reflects light incident from the front side of the light transmitting panel when the backlight is turned off, and transmits the backlight when the backlight is turned on to enable image display. When the backlight is turned off, the entire area of the display screen becomes a mirror, and when the backlight is turned on, an image is displayed in the entire area of the display screen.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

  The present invention relates to a display device used in a mobile phone, and more particularly to a display device. Display for mobile phone that can also be used as a mirror in a predetermined area on the display screen The present invention relates to a device and a mobile phone equipped with the device.

[0002]

[Prior art]

  Conventionally, devices that can share a mirror with a mobile phone include, for example, Opening 2002-271457 "Portable half mirror that can be used as a screen There is a "belt device".   This mobile phone has a reflective / transmissive half mirror on the front side of the liquid crystal screen of the mobile phone. It has a stacked structure, and when the power is turned off or the backlight is turned off, Since the mirror reflects light from the outside, it can be used as a mirror. On the other hand, When the light is on, the light is transmitted through the hermi-mirror and the image is displayed on the mobile phone. You can see.

[0003]

[Problems to be solved by the device]

  However, as in the conventional example, it is displayed on the LCD screen of the mobile phone display. In the method of stacking half mirrors, the light utilization efficiency in the case of image display becomes low, There is a problem that the contrast of the image is lowered.

[0004]   Therefore, in the present invention, a semi-transparent mirror layer is arranged on the back side of the liquid crystal layer, and The user can use the whole screen or a part of the screen as a mirror without deteriorating the image quality of the image display. To provide a display device for a mobile phone and a mobile phone that can be used I am.

[0005]

[Means for Solving the Problems]

  In order to achieve the above object, the device according to claim 1 forms a surface of a display screen. Light transmission panel, color filter, transparent electrode, liquid crystal layer, polarizing plate and backlight. A liquid crystal display device for a mobile phone, which comprises the Between the backlights, when the backlight is off, the light transmission panel Light incident from the front side of the It is equipped with a semi-transparent mirror layer that allows light to pass through and display images. When the light is off, the entire area of the display screen becomes a mirror, and the backlight is The feature is that the image is displayed in the whole area of the display screen when it is lit. It is a sign.   Further, the invention according to claim 2 is a light-transmitting panel or a cover forming a surface of a display screen. Cell phone composed of a color filter, transparent electrode, liquid crystal layer, polarizing plate and backlight In a liquid crystal display device for a telephone, between the polarizing plate and the backlight Therefore, when the backlight is turned off, the light is incident from the surface side of the light transmission panel. Light from the backlight is transmitted when the backlight is turned on. A semi-transparent mirror layer that enables image display, and a predetermined area of the display screen. It is possible to control to enable or block the transmission of light between the optical member and the backlight. And a transparent aperture layer, the entire area of the display screen when the backlight is turned off. When the area becomes a mirror and the backlight is turned on and an image is displayed, By controlling the blocking of light in the aperture layer, only the specified area becomes a mirror. Image is displayed in other areas to control light transmission in the aperture layer. Is characterized by displaying an image in the entire area of the display screen.

[0006]   The invention according to claim 3 is that the backlight is turned off in the liquid crystal layer. At the same time, a signal for making the liquid crystal layer transparent is applied. There is.   Further, in the invention according to claim 4, the semitransparent mirror layer is a transparent mirror substrate. A semi-transparent material is formed by vapor deposition or coating on the surface of the mirror substrate. I am trying.   Further, in the invention according to claim 5, the semitransparent mirror layer is in contact with a transparent mirror substrate. It is characterized in that a semi-transparent film is attached to the surface of the mirror substrate. There is.   In the device according to claim 6, the semitransparent mirror layer has a transparent mirror substrate. Then, on the surface of the mirror substrate, the same number of metals as the liquid crystal dot interval number is used. The vertical and horizontal thin lines with gloss are embedded and the light is transmitted through the opening and It is characterized in that a reflecting portion that reflects light is formed.   The invention according to claim 7 is that the semitransparent mirror layer is formed by repeating fine irregularities. Having a light-reflecting surface and a light-transmitting surface on the uneven surface of the transparent mirror substrate having a structure It has a feature.

[0007]   Further, in the device according to claim 8, the aperture layer is formed by applying a voltage. A liquid crystal shutter means for blocking the transmission of light, and an actuator for operating the liquid crystal shutter. And an aperture signal generation circuit for .   According to a ninth aspect of the invention, in the liquid crystal shutter for the aperture layer, When the transmission is blocked, the liquid crystal layer is filled with the liquid crystal corresponding to the aperture area. It is characterized in that a signal is applied which makes the layer transparent.   The invention according to claim 10 is the portable device according to any one of claims 1 and 2. It is characterized in that it is equipped with a display device for mobile phones.   According to the invention of claim 11, the power switch of the mobile phone is turned off. Sometimes, the backlight is turned off and the liquid crystal layer is made transparent at the same time. It is characterized in that a signal is applied.   According to a twelfth aspect of the invention, the backlight is turned on to display an image. The light blocking control of the aperture layer causes The mirror mode in which only the image becomes a mirror and an image is displayed in another area, Image display in the entire area of the display screen by controlling the transmission of light in the aperture layer Display mode to be selected, and a mode selection means for selecting It has a feature.

[0008]

[Embodiment of device]   Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.   FIG. 1 is an overall view of a mobile phone according to a first embodiment of the present invention.   FIG. 2 is a block diagram of the mobile phone shown in FIG.   FIG. 3 is a sectional view of the liquid crystal panel shown in FIG.   The mobile phone 1 shown in FIG. 1 is foldable, and FIG. 1 (A) is an overall perspective view. FIG. 1 (B) shows a state in which the side view is substantially half closed. This mobile phone 1 is a liquid Crystal display device 2, input operation unit 4 such as function keys, liquid crystal display 7, main body 3 and the like.

[0009]   In FIG. 2, the mobile phone 1 includes a wireless transmission / reception unit 31, a modulation / demodulation unit 32, an hour / minute Split / demultiplexer 33, codec 34, microphone 35, speaker 36, MPU 38, memory 40, liquid crystal display device 2, input operation unit 4, I / F unit 3 It is composed of nine.

[0010]   In addition, as a liquid crystal display for mobile phones, the light incident from the front is currently being used. A reflective liquid crystal display that uses a reflector to reflect light, and a backlight from the back There is a transmissive liquid crystal display that allows light of the above type to enter. The reflective LCD display is The ambient light is used for display without using a backlight, so the power consumption is low. It is suitable for mobile devices, but because the display light is displayed in proportion to the amount of ambient light, Do not use a transmissive type with a backlight in situations where sufficient outside light is not available, such as at night. I can't get enough brightness.

[0011]   The liquid crystal display device 2 of the present invention, as shown in the sectional view of FIG. The liquid crystal panel 20 includes a liquid crystal panel 20 from the front side (on the drawing) to the back side (on the drawing). (Below the surface), a polarizing plate 21, a light transmission panel 22, a color filter 23, and a transparent electrode. 24, a liquid crystal layer 25, a light transmission panel 22, a polarizing plate 21, and a semitransparent mirror layer 2 6 (hereinafter abbreviated as semi-transparent mirror) and a backlight 28 are arranged and configured. There is. Since the semi-transparent mirror 26 is arranged on the back surface of the liquid crystal 25 in this way, Therefore, the quality of the displayed image does not deteriorate.

[0012]   The semi-transparent mirror 26 is formed by applying a semi-transparent material to the surface of a transparent mirror substrate (or It is formed by vapor deposition). Alternatively, attach a semi-transparent film to the transparent mirror substrate Composed. The transparent mirror substrate and the semitransparent material are not particularly limited, but in general, they are transparent. The clear mirror substrate is made of resin-based acrylic, polycarbonate, etc. Mi), Ag (silver) type, etc. are often used. Other, translucent film Then, a dielectric multilayer film in which functional films having different refractive indexes are laminated can also be used.

[0013]   As the semi-transparent mirror 26 of the present invention, in particular, as shown in FIG. (A) As shown in the top view, on the surface of the transparent mirror substrate 45, the number of dot intervals of the liquid crystal and Formed by embedding the thin lines 46 in the vertical direction Y and the horizontal direction X having substantially the same number of metallic luster. To be done.   As a result, the backlight from the bottom surface as shown in the side sectional view of FIG. Opening a (corresponding to one pixel) a for transmitting the light of the above, and a metal surface for reflecting the incident light from the upper surface To form the reflection part b. This intersecting thin wire 46 is made of a metal such as Al or Ag. It can also be formed by vapor deposition or printing.

[0014]   The semitransparent mirror 26 formed by the thin line is opened when the backlight 28 is turned on. Light is transmitted from the mouth a and enters the liquid crystal 25, the surface of the liquid crystal panel 20 becomes bright, and the liquid crystal You can see 25 images. When the backlight 28 is turned off, The MPU 38 of the main body sends a transparent signal for making the liquid crystal 25 transparent to the electrode 24, and Crystal 25 is made transparent. The light that has entered the liquid crystal panel 20 in this state is In the reflection part b of the metallic luster line 46 formed on the semitransparent mirror 26 through the liquid crystal 25. It is reflected more and has a mirror function by the reflected light and the light transmission panel 21. Become.   As described above, the translucent mirror 26 by the thin line 46 of the present invention is Since the light enters the liquid crystal 25 without being reflected or absorbed through the transparent opening a, It is possible to display a bright and clear contrast image without reducing the efficiency of use. A good mirror effect can also be obtained by the metal reflecting portion b.

[0015]   On the other hand, the semi-transparent material coating / vapor deposition semi-transparent mirror 26 shown in FIG. Unlike the thin wire type semi-transparent mirror 26 of the present invention shown in FIG. Regarding the coating thickness of the transparent material, it is necessary to have a certain thickness in terms of light reflectivity. On the contrary, from the viewpoint of light transmittance, it is preferable to be thin, so that light transmittance and light reflectance are There is a trade-off relationship with each other, and at the same time satisfy the transmission and reflection characteristics. Is difficult, and the insertion of the semitransparent mirror is Therefore, it cannot be denied that the light utilization efficiency will be reduced to some extent.

[0016]   If this is improved by introducing the concept of the semi-transparent mirror of the present invention shown in FIG. For example, as shown in FIG. Applying a semi-transparent material such as Al (aluminum) or Ag (silver) on the reflective surface n side with irregularities However, the transparent side and the opening m side are left transparent as they are, and the light is transmitted when the backlight is turned on. Passing through the aperture m (corresponding to a in FIG. 4) without reflection / absorption and entering the liquid crystal. This allows the brightness of the displayed image on the liquid crystal to be controlled without decreasing the light utilization efficiency. Make sure that the trust does not decrease and that the light enters from the front when the backlight is off. The light is reflected by a mirror surface composed of a large number of reflecting surfaces n (b in FIG. 4), and a good mirror -It is possible to improve efficiency by applying a form that can expect an effect Is.

[0017]   In the present invention, the semi-transparent mirror 26 as shown in FIG. Using the transparent mirror 26, the following two modes (mirror mode, display Mode) can be set to configure a mobile phone with a mirror.   (1) In the mirror mode, the backlight 28 is turned off and the liquid crystal layer is transparent. This is the case when it is used as a mirror.   (2) In the display mode, the backlight 28 lights up and the liquid crystal 25 turns on. Image is displayed on the display.

[0018]   As a result, the liquid crystal panel 20 sets the mode button to turn on the backlight 28. Use as a mirror in mirror mode with a simple operation of simply turning on and off And a display device capable of normal image display in the display mode Functioning as a display, the LCD display can be operated with a simple operation such as specifying the turning off of the backlight 28. Play can be used as a mirror.

[0019]   Next, a second embodiment of the present invention will be described with reference to the drawings.   FIG. 6 is a sectional view of a liquid crystal panel according to a second embodiment of the present invention.   FIG. 7 is a diagram showing the structure of the aperture layer shown in FIG.   In FIG. 6, the liquid crystal panel 20 includes a polarizing plate 21, a light transmission panel 22, and a color panel. -Filter (GRB) 23, transparent electrode 24, liquid crystal 25, light transmission panel 22 A polarizing plate 21, a semitransparent mirror 26, an aperture layer 27, and a backlight. 28 and. The configuration different from that of the previous embodiment of FIG. That is, the layer 27 is disposed, and the backlight 28 is provided by the aperture layer 27. It is possible to form a mirror in any given area by controlling the transmission of light from is there.

[0020]   As shown in FIG. 7, in the aperture layer 27, light transmission is controlled by an applied signal. Composed of a liquid crystal shutter base 50 and an aperture signal generation circuit 41 There is. The liquid crystal shutter base 50 is substantially the same liquid crystal as the liquid crystal panel 20. liquid crystal The applied liquid crystal is applied by applying an applied signal to the liquid crystal of the shutter base 50. Shuts off the light from the backlight 28. And when you turn off the signal, it returns to the transparent state. It The aperture layer 27 has a plurality of preset patterns (for example, circles). Has an aperture signal generation circuit 41 for generating an aperture signal based on It The aperture signal generation circuit 41 is connected to the MPU 38 of the mobile phone body 3. ing. The aperture layer 27 has a function similar to that of a liquid crystal shutter, and a plurality of preparatory layers are used. Aperture signal is generated based on the pattern set for By controlling and opening and closing the shutter in a predetermined area, the backlight 28 It transmits / blocks the light from these.

[0021]   Next, the operation will be described.   The plurality of preset patterns are stored in the RAM of the MPU 38 and The pattern selected by input from the board 4 or the pattern displayed on the liquid crystal display 7 The pattern signal selected by selecting the display item such as The signal is transmitted to the signal generating circuit 41 for the parcher.

[0022]   Aperture signal to be applied in a predetermined shape from the aperture signal generation circuit 41 It transmits to the liquid crystal shutter base 50, and the opaque area which intercepted the light of a predetermined shape is blocked. Form. A predetermined shaped opaque area 52 (light blocking) of the liquid crystal shutter base 50. The transparent portion 51 allows the light from the backlight to pass through except for the cut-off area). On the liquid crystal display 7 A normal image is displayed on the part where the light passes, and the light of the backlight 28 is blocked. The opaque area 52 becomes a mirror surface as in the state where the backlight 28 is turned off. At this time, the liquid crystal 25 is simultaneously applied in a predetermined shape by the aperture signal. This is to make the aperture area corresponding to the liquid crystal aperture layer 27 transparent. is there.

[0023]   In this way, the surface of the liquid crystal display 7 is formed into a mirror surface area in a predetermined shape. The surface other than the mirror surface area functions as a normal display 7. It Therefore, on the liquid crystal display 7, the mirror and the transmitted image are individually Can be displayed at the same time or at the same time, so it will be displayed on the mirror with the transmitted image. You can superimpose and see your face.   By setting the aperture area (opaque area) as the entire display screen area, The same as the mirror mode and display mode by turning on and off the backlight. Function can be implemented.

[0024]

[Effect of device]

  As described above, according to the present invention, the light transmitting panel forming the surface of the display screen is formed. Module, color filter, transparent electrode, liquid crystal layer, polarizing plate and backlight. Between a polarizing plate and a backlight in a liquid crystal display device for a mobile phone Therefore, when the backlight is turned off, the light incident from the front side of the light transmission panel is reflected. When the backlight is lit, the light of the backlight is transmitted to enable image display The semi-transparent mirror layer and the back surface of the semi-transparent mirror layer A controllable aperture layer that allows or blocks the transmission of light between the lights When the backlight is turned off, the entire area of the display screen becomes a mirror, When is turned on and an image is displayed, it is possible to control the blocking of light in the aperture layer. Only a predetermined area becomes a mirror and an image is displayed in the other area. Image display in the entire display screen area by controlling the transmission of light in the layer Because I configured   When the power of the mobile phone is off, the entire area of the display screen of the mobile phone is Mirror and display screen even when mobile phone is powered on Only a predetermined area in the image becomes a mirror to display an image in another area, The effect that it is possible to selectively display images in the entire area of the display screen is there.

[Brief description of drawings]

FIG. 1 is an overall view of a mobile phone according to a first embodiment of the present invention.

FIG. 2 is a block diagram of the mobile phone shown in FIG.

FIG. 3 is a cross-sectional view of the liquid crystal panel shown in FIG.

FIG. 4 is a schematic view of a thin wire type semitransparent mirror of the present invention.

FIG. 5 is a schematic view of an uneven translucent mirror of the present invention.

FIG. 6 is a cross-sectional view of a liquid crystal panel according to a second embodiment of the present invention.

7 is a configuration diagram of an aperture layer shown in FIG.

[Explanation of symbols]

1 mobile phone 2 Liquid crystal display device 3 body 4 Input operation section 6 antenna 7 LCD display 21 Polarizer 22 Light transmission panel 26 semi-transparent mirror 27 Aperture layer 28 Backlight 38 MPU 41 Signal generation circuit for aperture 46 Fine line 50 LCD shutter base 52 Opaque area

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Creator Haruo Takeuchi             Stock exchange, 3-25-3, Nishi-Shimbashi, Minato-ku, Tokyo             Company Terra Matrix (72) Creator Yoshitaka Kato             38-1 Wakaba-cho, Chofu-shi, Tokyo

Claims (12)

[Scope of utility model registration request] 1. A liquid crystal display device for a mobile phone, comprising a light transmitting panel forming a surface of a display screen, a color filter, a transparent electrode, a liquid crystal layer, a polarizing plate and a backlight, wherein the polarizing plate and the backlight. A semi-transparent mirror layer that is between the two and reflects the light incident from the surface side of the light transmission panel when the backlight is turned off and transmits the light of the backlight when the backlight is turned on to enable image display. A display device for a mobile phone, comprising: a display device for a mobile phone, wherein the entire area of the display screen serves as a mirror when the backlight is turned off, and an image is displayed in the entire area of the display screen when the backlight is turned on. 2. A liquid crystal display device for a mobile phone, comprising a light transmitting panel forming a surface of a display screen, a color filter, a transparent electrode, a liquid crystal layer, a polarizing plate and a backlight, wherein the polarizing plate and the backlight are provided. A semi-transparent mirror layer that is between the two and reflects the light incident from the surface side of the light transmission panel when the backlight is turned off and transmits the light of the backlight when the backlight is turned on to enable image display. And, in a predetermined area of the display screen, an aperture layer that is controllable to enable or block light transmission between the optical member and the backlight, and the entire area of the display screen when the backlight is off. Is a mirror, and when the backlight is turned on and an image is displayed, the light blocking control in the aperture layer is performed. More wherein only a predetermined area to perform image display in the other region becomes a mirror, mobile phone for a display device, characterized in that the image displayed in the display screen the entire area by the transmission control of the light in the aperture layer. 3. The mobile phone according to claim 1, wherein a signal for making the liquid crystal layer transparent is applied to the liquid crystal layer at the same time when the backlight is turned off. Display device. 4. The mobile phone according to claim 1, wherein the semitransparent mirror layer is formed by depositing or coating a transparent mirror substrate and a semitransparent material on a surface of the mirror substrate. Display device. 5. The display device for a mobile phone according to claim 1, wherein the semitransparent mirror layer is formed by attaching a semitransparent film to a transparent mirror substrate and a surface of the mirror substrate. . 6. The semi-transparent mirror layer has a transparent mirror substrate, and vertical and horizontal fine lines having a metallic gloss of about the same number as the liquid crystal dot spacing are embedded on the surface of the mirror substrate. The display device for a mobile phone according to claim 1 or 2, wherein an opening portion for transmitting light and a reflecting portion for reflecting light are configured. 7. The mobile phone according to claim 4, wherein the semitransparent mirror layer has a light-reflecting surface and a light-transmitting surface on the uneven surface of a transparent mirror substrate having a repeating structure of fine unevenness. Display device. 8. The aperture layer comprises liquid crystal shutter means for blocking transmission of light when a voltage is applied, and an aperture signal generating circuit for operating the liquid crystal shutter. Item 3. A display device for a mobile phone according to item 2. 9. A signal for making the liquid crystal layer corresponding to the aperture region transparent is applied to the liquid crystal layer when the liquid crystal shutter for the aperture layer blocks transmission of light. The display device for a mobile phone according to claim 8. 10. A mobile phone comprising the display device for a mobile phone according to claim 1 or 2. 11. The signal for making the liquid crystal layer transparent is applied at the same time when the backlight is turned off when the power switch of the mobile phone is turned off. Mobile phone. 12. A mirror mode in which when the backlight is turned on and an image is displayed, a control is performed to block light in the aperture layer so that only the predetermined area serves as a mirror and an image is displayed in another area. The mobile phone according to claim 10 or 11, further comprising a mode selection unit for selecting a display mode in which an image is displayed in the entire area of the display screen by controlling light transmission in the aperture layer.