JP2004053925A - Display unit for portable telephone, and portable telephone - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display unit for a portable telephone capable of utilizing an optional selection region in a display screen as a mirror. <P>SOLUTION: The liquid crystal display unit is provided with a translucent mirror layer 26 disposed between a polarizing plate 21 and a backlight 28, reflecting light made incident from the surface side of a light trans mission panel when the backlight is turned off and transmitting light of the backlight to enable image display when the backlight is lit and an aperture layer 27 disposed on the entire surface of a display region between the translucent mirror layer 26 and the backlight and capable of transmitting or interrupting light between the translucent mirror layer and the backlight in an optional selection region on the display screen. When the backlight is turned off, the entire region of the display screen is a mirror and when the backlight is lit and an image is displayed, the selection region is a mirror by the light interruption of the aperture layer and image display is performed in the other region and the image is displayed in the entire region of the display screen by light transmission of the aperture layer. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a display device used for a mobile phone, and more particularly to a display device for a mobile phone that can use a designated area on a display screen as a mirror, and a mobile phone equipped with the same.
[0002]
[Prior art]
At present, mobile phones (herein referred to as "mobile phones" including various mobile communication devices having a display device such as a mobile communication data processing device and a PHS phone) have been widely used by people of all ages. Cellular phones are no longer just tools for talking over the phone, but are also used as convenient and effective means of acquiring various information, exchanging e-mail, purchasing games, purchasing goods, etc. by connecting to the Internet etc. Has been reached.
[0003]
Furthermore, recent mobile phones have been equipped with a CCD camera and have a function of transmitting a face image or the like of a caller to a mobile phone of a called party, and have been widely used.
[0004]
As described above, the mobile phone has become an indispensable mobile item today, and is used everywhere where radio waves can communicate and can be used regardless of the place of use. In order to respond immediately when there is a call (when there is an incoming call), the mobile phone is carried and used in a pocket where the mobile phone can be easily taken out or a place where the handbag can be easily taken out.
[0005]
On the other hand, mirrors are an essential mobile item, especially for young women, as well as mobile phones. Mirrors are frequently checked for makeup and hairstyles. For this reason, the mirror needs to be carried to a place where it can be easily taken out.
[0006]
[Problems to be solved by the invention]
For this reason, mobile phones are stored in pockets or bags, and mirrors are also carried in handbags or the like. The mobile phone is stored in a place where it can be easily removed at any time so that you can immediately respond to incoming calls, so you can easily check your makeup and hairstyle using the mobile phone when using the mobile phone As a convenience, the convenience of the mobile phone will be further improved.
[0007]
For this reason, even if the mirror is attached to the back of the phone or the like, the total weight of the mobile phone becomes heavier due to the weight of the mirror. It will be greatly impaired.
[0008]
For this reason, the present invention provides a display device for a mobile phone that can use an arbitrary selected area on a display screen as a mirror (mirror), and also displays an image captured by a CCD camera, an image reflected on a mirror, and the like. It is an object to provide a mobile phone having a function of transmitting synthesized image data.
[0009]
[Means for Solving the Problems]
Therefore, the present invention provides 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. It is located between the backlights, and reflects light incident from the front side of the light-transmitting panel when the backlight is turned off, and transmits light of the backlight when the backlight is turned on to enable image display. A mirror layer, disposed on the entire display area between the translucent mirror layer and the backlight, and allowing transmission of light between the translucent mirror layer and the backlight in any selected area on the display screen; or An aperture layer that can be controlled to shut off, and when the backlight is turned off, the entire area of the display screen becomes a mirror, When the light is turned on and an image is displayed, the selected area becomes a mirror by the light blocking control in the aperture layer to perform image display in another area, and the entire display screen is controlled by the light transmission control in the aperture layer. An object of the present invention is to provide a display device for a mobile phone, which displays an image in an area.
[0010]
Here, the selection area is formed by designating a selected one of a plurality of preset shapes, a scale of the selected shape, and an arrangement position on the display screen. When the mobile phone is turned off, the entire area of the display screen of the mobile phone is mirrored, so even if the mobile phone is turned on, it can be selected arbitrarily on the display screen Only the specified area becomes a mirror, so that an image can be displayed in another area or an image can be displayed in the entire display screen area.
[0011]
Here, a signal for making the liquid crystal layer transparent is applied to the liquid crystal layer at the same time that the backlight is turned off, thereby ensuring the function as a mirror. Since the power consumption for applying a signal for making the liquid crystal layer transparent is extremely small, the consumption of the battery is not increased.
[0012]
Here, the translucent mirror layer is formed by applying a translucent material to a transparent mirror substrate and the surface of the mirror substrate, or a translucent film is adhered to the surface of the transparent mirror substrate and the mirror substrate. Is formed.
[0013]
However, more desirably, the semi-transparent mirror layer has a transparent mirror substrate, and on the surface of the mirror substrate, vertical and horizontal thin lines having substantially the same number of metallic luster as the number of liquid crystal dot intervals. Is embedded.
[0014]
Further, the aperture layer is constituted by a liquid crystal shutter means for blocking transmission of light by applying a voltage in the selected area.
[0015]
Further, the aperture layer includes the liquid crystal shutter means and an aperture signal generation circuit for operating the liquid crystal shutter means in the selected area.
[0016]
Then, when the liquid crystal shutter means blocks transmission of light in the selected area, a signal for making the liquid crystal layer in the selected area transparent is applied to the liquid crystal layer.
[0017]
The present invention is further a mobile phone equipped with a liquid crystal display device, wherein the liquid crystal display device has a light transmission panel forming a surface of a display screen, a color filter, a transparent electrode, a liquid crystal layer, a polarizing plate, And a backlight, further provided between the polarizing plate and the backlight, for reflecting light incident from the surface side of the light transmitting panel when the backlight is turned off, and for turning on the backlight when the backlight is turned on. A translucent mirror layer that transmits an image of a light to enable image display; and a translucent mirror layer disposed on an entire display area between the translucent mirror layer and the backlight, and the translucent in an arbitrary selected area on the display screen. A mirror layer and an aperture layer that can be controlled to allow or block transmission of light between the backlight, and when the backlight is turned off. When the entire area of the display screen becomes a mirror and the backlight is turned on and an image is displayed, the selected area becomes a mirror by light blocking control in the aperture layer to perform image display in another area, An object of the present invention is to provide a mobile phone characterized in that an image is displayed on the entire display screen by controlling light transmission in the aperture layer.
[0018]
The mobile phone further includes a CCD camera, and the CCD camera is disposed at a position of the main body of the mobile phone that faces the liquid crystal display device, and rotates with an arm that supports the CCD camera. It is characterized in that it is mounted so that the angle of view can be changed freely.
[0019]
Thereby, the display image displayed on the liquid crystal display device and the image reflected on the mirror with the selected area being a mirror due to the light blocking control in the aperture layer are captured by the CCD camera. Is configured.
[0020]
The image processing apparatus further includes image data storage means for storing image data captured by the CCD camera, and communication means for transmitting the image data to a mobile phone of a call destination.
[0021]
Further, the mobile phone can download image data from the outside via a communication network based on a TCP / IP protocol and display the image data on the liquid crystal display device.
[0022]
When the power switch of the mobile phone is turned off, the liquid crystal backlight is turned off, and at the same time, a signal for making the liquid crystal layer transparent is applied to ensure the function as a mirror in the selected area. ing.
[0023]
By the way, in order to facilitate the selection operation of the selection area, on the display screen, one shape selected from a plurality of preset shapes, a scale of the selected shape, and an arrangement thereof. The position is determined by the cursor means.
[0024]
And, when the backlight is turned on and an image is displayed, a mirror mode in which only the selected area becomes a mirror by the light blocking control in the aperture layer to display an image in another area, or the aperture layer And a mode selection means for selecting a display mode in which an image is displayed on the entire display screen by the light transmission control in the above.
[0025]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of a mobile phone display device and a mobile phone equipped with the same according to the present invention will be described in detail with reference to the drawings.
[0026]
The mobile phone 1 shown in FIG. 1 shows a foldable mobile phone 1, and FIG. 1A is a front view of the entire mobile phone 1 according to the present invention, showing a state in which the mobile phone 1 is opened, and FIG. Shows a side view of the entire mobile phone 1 and shows a state in which the mobile phone 1 is almost half closed. The mobile phone 1 has a display device 2 on which a liquid crystal display 7 is arranged, an input operation unit 4 including function keys and numeric keys, a main body 3 and an antenna 6, and a free arm 9 rotatably changing an imaging angle. And a camera unit 5 including a CCD (not shown).
[0027]
FIG. 2 is a block diagram showing a configuration of the mobile phone 1 in FIG. 1 and 2, a mobile phone 1 according to the present invention is a cellular mobile phone system (PDC system / PHS system), and has a camera unit 5 for imaging a screen displayed on a display device 2. ing.
[0028]
The configuration of the mobile phone 1 is known as a PDC system or a PHS system. For example, a radio transmission / reception unit 31 including a frequency switching synthesizer and a reception electric field strength (RSSI) detection unit, a modulation / demodulation unit 32, a time division / demultiplexing unit 33, and a codec (encoding / decoding) unit 34 A transmitting microphone 35, a receiving speaker 36, a microprocessor 38, a memory 40, a display device 2 such as an incoming call display light emitting diode or a liquid crystal display 7, and an input operation unit 4 including function keys and numeric keys. , A camera unit 5 for imaging an object, and an I / F unit 39 for enabling connection with an external device.
[0029]
Here, the liquid crystal display device 2 will be described. As devices for displays, devices using light-emitting diodes (LEDs) and devices using liquid crystals (LCDs) are widely used in consumer or industrial electronic devices. A device (LED) using a light emitting diode is a pn junction type diode whose basic element is made of a compound semiconductor single crystal such as GaP, GaAsP, and GaAs, and emits light when a forward voltage is applied. The wavelength of the emitted light is determined by the characteristics of the material, and an LED that emits visible light is used as a display. Red, orange, yellow, and yellow-green color light is mass-produced. Generally, the light-emitting portion of the LED is a minute pn junction surface of about 0.3 mm square, but is classified into two types, a monolithic display and a hybrid display, depending on the difference in the configuration method. The former targets small displays and the latter targets large displays.
[0030]
On the other hand, liquid crystals used in liquid crystal displays are composed of liquid rod-like organic molecules, and are classified into three types, magnetic, cholesteric, and smectic, depending on the molecular arrangement. Since all of them take a regular arrangement, they show anisotropy in electrical, magnetic, optical and other physical properties. In a liquid crystal display device (LCD), a nematic liquid crystal is mainly used, and an electrical anisotropy such as a dielectric constant and a conductivity and an optical anisotropy such as a refractive index are used. There are various types of LCDs depending on the type of liquid crystal and the optical effect to be used. Typical examples include a dynamic scattering type, a birefringent type, a twisted-matic type, a guest-host type, and a ferroelectric liquid crystal type. Among them, the twisted-matic (TN) system is currently widely used. This is based on the following operation principle.
[0031]
That is, in the off state, since the molecular orientation of the liquid crystal is twisted by 90 °, the incident polarization plane rotates 90 ° along the twist and passes through the polarizer. That is, it is bright. When a voltage is applied to this, the twist is released and the molecules are rearranged in the direction of the electric field, and the polarization plane does not rotate, so that it cannot pass through the polarizer. That is, it is dark. Therefore, a dark state and a bright state can be switched depending on the presence or absence of a voltage.
[0032]
LCDs need to be driven with an AC voltage to prevent degradation of the liquid crystal due to electrochemical reactions. In a simple display, a static drive method in which an AC voltage is directly applied to a display electrode is used. On the other hand, in a multi-digit numeric display or the like, a multiplex driving method in which several display electrodes are collectively time-divisionally driven to reduce the number of lead wires is used. A large-scale multiplex drive is a matrix LCD.
[0033]
This LCD drive has a plurality of X and Y transparent electrodes as scanning line electrodes, sequentially applies scanning pulses to the X electrodes, and simultaneously applies signal voltage pulses from the Y electrodes according to the display pattern of the line. This is done by applying.
[0034]
Further, in the color display of the liquid crystal, only the birefringence method (ECB) has a multi-color display function in the LCD itself. However, this method is difficult to apply to general display devices because the display color changes sensitively depending on the cell gap, temperature, voltage and the like. On the other hand, a method of providing a full color by attaching fine filters of red, green, and blue to the inner surface of a monochrome LCD is used. This is formed by using a photo process for each pixel of a normal matrix LCD or an active matrix LCD, and can independently control color dots of three primary colors. This method is currently used for many electronic devices, but requires back illumination because the light absorption by the polarizer and the color filter is large and the transmittance of the panel is as low as 5 to 7%.
[0035]
The liquid crystal having such a display function has been put to practical use as a display for a wristwatch, an electronic desk calculator, a character / graphic display, a mobile phone 1, a television, and the like, and has been widely used. The liquid crystal display device includes a reflection type that uses a reflector to reflect light incident from the entire surface of the liquid crystal panel 20, and a transmission type that allows light to enter from the back. In the case of the transmission type, there are a system in which ambient light is incident and a system in which a dedicated light source (backlight, mainly a fluorescent tube) is used. The reflection type is used for watches and calculators, and the transmission type is used for display devices such as televisions, mobile phones and PCs. The liquid crystal is driven by a matrix. As the liquid crystal matrix, a liquid crystal matrix panel having a predetermined number of dots, such as a character graphic such as 640 × 200 dots or 640 × 400 dots, or a television having 360 × 240 dots, is used. The liquid crystal matrix panel includes an active matrix type including a switching semiconductor element and a storage element (TFT) for storing signals in the panel, and a passive matrix type not including this. In the passive matrix system, the manufacturing process is relatively simple, but it is difficult to obtain a large contrast. The active matrix method has a complicated manufacturing process, but can obtain a large contrast ratio.
[0036]
When no voltage is applied, light incident on the liquid crystal panel passes through the polarizing plate, so that only light that vibrates in one direction passes through and rotates 90 ° in the liquid crystal. When a sufficiently large voltage is applied, the motor stops rotating. When two polarizing plates are perpendicular to each other, the screen becomes bright when no voltage is applied, and becomes dark when a voltage is applied. This type is called normally open. When two polarizing plates are made parallel, the plate becomes dark when no voltage is applied, and becomes bright when a voltage is applied. This type is called normally closed.
[0037]
In order to display images clearly, a normally open configuration is suitable. From the above, an active matrix type liquid crystal panel is used for a liquid crystal display of a mobile phone because of the display brightness and precision.
[0038]
Here, the liquid crystal display device 2 for a mobile phone according to the present invention using the above-described liquid crystal panel will be described. The mobile phone liquid crystal display device 2 includes a housing of the mobile phone and a liquid crystal panel 20 provided in the housing.
[0039]
FIG. 3 shows a configuration of the liquid crystal panel 20. The liquid crystal panel 20 has a polarizing plate 21, a glass substrate 22, a color filter (GRB) 23, a transparent electrode 24, a liquid crystal 25, a glass substrate 22, a polarizing plate 21, A mirror layer 26, an aperture layer 27, and a backlight layer 28 are provided. In the translucent mirror 27, as shown in FIG. 4, a thin metallic luster (for example, silver) line 46 is embedded on a transparent substrate 45 serving as a mirror base at an interval substantially equal to the interval between the liquid crystals 25. .
[0040]
Here, a signal for making the liquid crystal layer 25 transparent is applied to the liquid crystal layer 25 at the same time when the backlight 28 is turned off.
[0041]
The translucent mirror 26 has a first configuration in which a translucent material is applied to a transparent mirror substrate and the surface of the mirror substrate. As a second embodiment of the translucent mirror 26, a translucent film may be attached to a transparent mirror substrate and a surface of the mirror substrate.
[0042]
However, desirably, the translucent mirror 26 has a transparent mirror substrate, and on the surface of the mirror substrate, vertical and horizontal thin lines having the same number of metallic lusters as the number of dot intervals of the liquid crystal are formed. Embedded and formed.
[0043]
In FIG. 4, a dotted arrow Z indicates that a line 46 having metallic luster embedded vertically and horizontally is embedded on the entire surface of the substrate 45. When the backlight 28 is turned on, light enters the liquid crystal 25 from between the thin metallic luster lines 46. The incident light makes the surface of the liquid crystal panel 20 bright, and the image of the applied liquid crystal 25 can be seen.
[0044]
When the backlight 28 is turned off, the MPU 38 of the mobile phone main body 2 transmits a transparent signal for making the liquid crystal 25 transparent to the electrode 24 to make the liquid crystal transparent. The light incident on the liquid crystal panel 20 is transmitted through the polarizing plate 21 and the liquid crystal 25 to irradiate a thin metallic gloss line 46 embedded in the translucent mirror 26, and the reflected light reflected on the metallic gloss line 46 and the glass substrate 21 has a mirror function.
[0045]
With the configuration described above, the display device 2 of the present invention can hold the following two states (mirror mode and display mode).
(1) In the mirror mode, the backlight 28 is turned off and the layer of the liquid crystal 25 becomes transparent.
(2) The display mode is a state in which the backlight 28 is turned on and an image is displayed on the layer of the liquid crystal 25.
[0046]
As a result, the liquid crystal panel 20 functions as the display device 2 capable of displaying the mirror mode and the display mode image by a simple operation of merely turning on and off the backlight 28, and specifies turning off the backlight. With only a simple operation, the liquid crystal display 7 can be used as a mirror. At this time, the entire area of the liquid crystal shutter base 50 of the aperture layer 27 is transparent.
[0047]
Further, in the present invention, a configuration is provided in which an arbitrary selected area on the display screen is mirrored by controlling transmission of light from the backlight 28 by the aperture layer 27. As shown in FIG. 5, the aperture layer 27 includes a liquid crystal shutter base 50 whose light transmission is controlled by an applied signal, and an aperture signal generation circuit 41. The liquid crystal shutter base 50 has substantially the same configuration as the liquid crystal panel 20 described above. By applying an application signal to the liquid crystal of the liquid crystal shutter base 50, the applied liquid crystal blocks light from the backlight 28. It has the function of transmitting light when the application is turned off. The aperture layer 27 has an aperture signal generation circuit 41 that generates an aperture signal based on a plurality of preset patterns (for example, a circle). The aperture signal generation circuit 41 is connected to the MPU 38 of the mobile phone 3.
[0048]
As described above, the aperture layer 27 has the same function as the liquid crystal shutter, generates an aperture signal based on a plurality of preset patterns (for example, a circle), controls the liquid crystal shutter, and controls the liquid crystal shutter in a predetermined area. By opening and closing the shutter, transmission and blocking of light from the backlight 28 are performed.
[0049]
Here, the configuration of the aperture layer 27 will be described together with the operation. The plurality of preset patterns are stored in the MPU 38, and a pattern signal selected by inputting from the keyboard 4 or selecting a display item such as a pattern number and a name displayed on the display 7 is displayed. The signal is transmitted to the aperture signal generation circuit 41.
[0050]
An aperture signal to be applied in a predetermined shape from the aperture signal generation circuit 41 is transmitted to the liquid crystal shutter base 50 to form an opaque region in which light of a predetermined shape is blocked. Except for the selected area 52 (area where light is blocked) of the liquid crystal shutter base 50, the light of the backlight 28 is transmitted through a transparent portion. A normal image is displayed on a portion of the display 7 through which light passes, and the selected area 52 in which the light of the backlight 28 is blocked has a mirror surface as in the state where the backlight 28 is turned off. At this time, the liquid crystal is simultaneously applied in a predetermined form by the aperture signal, in order to make the aperture area (selection area 52) of the liquid crystal transparent.
[0051]
This makes it possible to make the surface of the display 7 a mirror surface region in a predetermined shape, and the surface other than the mirror surface region functions as a normal display 7. Therefore, since the mirror and the transmitted image can be displayed independently or simultaneously on the display 7, superimposing the transmitted image and the face or the like reflected on the mirror can be performed. Can be done.
[0052]
By setting the aperture area to be the entire area of the display screen, functions similar to those of the mirror mode and the display mode by turning on and off the backlight can be performed.
[0053]
Next, the setting of the shape and size position of the aperture area (selection area 52) on the liquid crystal display 7 will be described.
[0054]
As described above, in the present liquid crystal display device, it is possible to arbitrarily select a preset and stored shape and size selection area 52 (hereinafter, appropriately referred to as an aperture area 52) and display an image. It is possible. Therefore, in addition to the function of selecting the stored shape, the aperture region 52 having a predetermined shape and size can be freely formed on the liquid crystal display 7.
[0055]
The MPU 38 stores a program for the aperture area setting 52. The program also includes setting of input keys 4 for inputting data for setting the aperture area. The aperture area setting signal input by the input key 4 is transmitted to the aperture setting circuit 41 by the MPU 38, and the aperture setting circuit 41 applies the liquid crystal shutter base 50 based on the transmitted signal to form the aperture area 52.
[0056]
Next, an example of the setting operation of the aperture area 52 will be described.
[0057]
FIG. 6 shows an example of an aperture area setting screen of the liquid crystal display 7.
First, the screen display on the display 7 of the mobile phone is changed to a screen for setting the selection area 52.
[0058]
A shape (for example, an oval or a star) is selected from the shape list displayed on the shape selection screen. These plurality of shape data are stored in the mobile phone in advance. It is also possible to specify a point of a shape and move the point while pressing a movement key, for example, to form the shape. Next, an instruction to enlarge or reduce the formed shape is issued, and the size of the aperture area formed on the display screen is set. For example, the size of the currently displayed shape is set by designating% (50%, 100%, 120%, etc.) displayed on the display.
[0059]
Finally, the position of the aperture area formed on the display screen is set on the display. Designate the position of the screen displayed on the display screen (for example, upper right, upper left, lower right, lower left, center, center right, center left, etc.). With this operation, the shape, size, and display position of the aperture area can be freely set on the display screen.
[0060]
Further, according to the present invention, as described above, the mobile phone 1 uses the superimposed image of the image reflected on the mirror displayed on the display 7 and the transmitted image as the CCD mounted on the mobile phone 1. The camera 5 is configured to take a photograph and take the photographed image into the memory 40 of the mobile phone 1 as digital image data.
[0061]
FIG. 7 shows a state in which the CCD camera 5 captures an image reflected on a mirror surface of the display, for example, the display 7 on which both the face of the user and the transmitted image are displayed. As shown in FIG. 7, the mobile phone 1 has the display device 2 side and the main body side 3 foldable, and the display device 2 side is bent at an angle that allows the face to be reflected on the mirror surface of the display 7. A small camera 5 connected to the main body of the mobile phone 1 is attached to an end of the main body facing the liquid crystal display 7. The CCD camera 5 includes a lens 8, a CCD image sensor (not shown) that converts an image captured by the lens 8 into a digital image by converting the data, and a board that sends out digital image data. The CCD camera 5 is known, and a detailed description is omitted.
[0062]
The CCD camera 5 is rotatably mounted on the main body 3 of the mobile phone 1, and is supported by a free arm 9 provided on the main body so that the angle of view can be freely set. The camera position is adjusted by rotating the camera to an angle at which the image reflected on the mirror surface of the display 7 and the transmitted and displayed image can be viewed in an optimal state, and both images can be clearly captured. Since the image plane displayed by the liquid crystal and the image reflected on the mirror have different focal lengths, the lens 8 of the CCD camera 5 has a deep focal length function so that the two images can be photographed within the same focal length. And a lens 8 having the following. Further, after the communication is completed, when the mobile phone is folded for storage, the camera 5 is configured to rotate in a direction opposite to that of the camera shooting and store the mobile phone in the main body 3.
[0063]
The captured image data can be transmitted and received as data transmitted and received by a normal mobile phone. Thereby, for example, it is also possible to transmit the photographed image data to the PC via e-mail and print the image.
[0064]
As a result, the user turns the CCD camera 5 to point the camera in the direction of capturing his / her own face, captures his / her own face, captures the captured image into the mobile phone 1, and displays it on a predetermined area of the liquid crystal display 7. At this time, the area where the user's face is displayed is the aperture area where the area of the image to be inserted by the aperture signal described above is set, and corresponds to the aperture area set from the display screen on which the transmitted image is displayed. The display area to be cut is cut out, and an image of, for example, one's own face photographed by the camera is inserted into the cut out area. The transmitted image is displayed outside the area controlled by the aperture signal.
[0065]
Then, the user's face is superimposed and displayed in the predetermined area. As a result, the created image is transmitted to an external device such as a PC, and the PC can generate, for example, a photo in a print-like form and print it with a printer.
[0066]
Further, in this embodiment, the problem of the depth of focus of the lens 8 that occurs when the image displayed on the display 7 and the image reflected on the mirror described in the previous embodiment are captured by the CCD camera 5 is solved. Is done. Therefore, the image quality of the superimpose screen transmitted to a PC or the like is improved. However, in order to view the superimposed image by itself, the image of the configuration described in the second embodiment is clear and excellent in the second embodiment. Even when the liquid crystal display is used as a mirror, a clear image can be seen. Image data for transmitting the superimposed image to an external device such as a PC can be generated.
[0067]
【The invention's effect】
As described in detail above, the display device according to the present invention provides a liquid crystal display for a mobile phone, which includes a light transmission panel, a color filter, a transparent electrode, a liquid crystal layer, a polarizing plate, and a backlight that form the surface of a display screen. In the device, between the polarizing plate and the backlight, when the backlight is turned off, reflects light incident from the surface side of the light transmitting panel, and when the backlight is turned on, the light of the backlight is transmitted. A translucent mirror layer that enables image display; and a translucent mirror layer disposed between the translucent mirror layer and the backlight in an arbitrary selected area on the display screen. An aperture layer capable of controlling or allowing transmission of light, and wherein the backlight is turned off when the backlight is turned off. When the entire area of the display screen becomes a mirror and the backlight is turned on and an image is displayed, the selected area becomes a mirror by light blocking control in the aperture layer to display an image in another area, and the aperture is displayed. An image is displayed on the entire display screen by controlling light transmission in the layer.
[0068]
Here, the selection area is formed by designating a selected one of a plurality of preset shapes, a scale of the selected shape, and an arrangement position on the display screen. When the mobile phone is turned off, the entire area of the display screen of the mobile phone is mirrored, so even if the mobile phone is turned on, it can be selected arbitrarily on the display screen Only the displayed area becomes a mirror to display an image in another area or to display an image in the entire display screen.
[Brief description of the drawings]
FIG. 1 shows an overall view of a mobile phone,
(A) shows the whole front view of the state where the mobile phone was opened,
FIG. 2B is a side view of the mobile phone shown in FIG.
FIG. 2 shows a block diagram of a configuration of a mobile phone.
FIG. 3 shows a configuration of a liquid crystal panel according to the present invention.
FIG. 4 shows a configuration of a translucent mirror according to the present invention.
FIG. 5 shows a configuration of an aperture layer according to the present invention.
FIG. 6 shows an example of a screen for setting an aperture area according to the present invention.
FIG. 7 shows a state where a liquid crystal display of the mobile phone according to the present invention is imaged by a camera.
[Explanation of symbols]
1 mobile phone
2 Liquid crystal display device
3 body
4 Input operation unit
5 Camera
6 Antenna
7 Liquid crystal display
8 lenses
9 Free arm
21 Polarizing plate
22 Glass substrate
26 translucent mirror
27 Aperture layer
28 Backlight
41 Aperture signal generation circuit
46 Thin metallic luster lines
50 LCD shutter base
52 Selection area (aperture area)

Claims (18)

In a liquid crystal display device for a mobile phone comprising a light transmission panel forming a surface of a display screen, a color filter, a transparent electrode, a liquid crystal layer, a polarizing plate and a backlight,
It is located between the polarizing plate and the backlight, and reflects light incident from the surface side of the light transmitting panel when the backlight is turned off, and transmits light of the backlight when the backlight is turned on to display an image. A translucent mirror layer to enable
A control is arranged on the entire display area between the translucent mirror layer and the backlight to enable or block light transmission between the translucent mirror layer and the backlight in an arbitrary selected area on the display screen. And a possible aperture layer,
When the backlight is turned off, the entire area of the display screen becomes a mirror,
When the backlight is turned on and an image is displayed, the selected area becomes a mirror to perform image display in another area by light blocking control in the aperture layer, and the display is performed by light transmission control in the aperture layer. A display device for a mobile phone, wherein an image is displayed on the entire screen. The selection area is set on the display screen by designating one shape selected from a plurality of preset shapes, a scale of the selected shape, and an arrangement position thereof. The display device for a mobile phone according to claim 1, wherein: The display device for a 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. 3. The display device for a mobile phone according to claim 1, wherein the translucent mirror layer is formed by applying a translucent material to a transparent mirror substrate and a surface of the mirror substrate. 4. The display device for a mobile phone according to claim 1, wherein the translucent mirror layer is formed by attaching a translucent film to a transparent mirror substrate and a surface of the mirror substrate. The translucent mirror layer has a transparent mirror substrate, and vertical and horizontal thin lines having the same metallic luster as the number of dot intervals of the liquid crystal are embedded on the surface of the mirror substrate. The display device for a mobile phone according to claim 1 or 2, wherein: 3. The display device for a mobile phone according to claim 2, wherein the aperture layer is configured by a liquid crystal shutter unit that blocks transmission of light by applying a voltage in the selected region. 8. The display device for a mobile phone according to claim 7, wherein said aperture layer is constituted by said liquid crystal shutter means and an aperture signal generation circuit for operating said liquid crystal shutter means in said selected area. . A signal for making the liquid crystal layer transparent in the selected area is applied to the liquid crystal layer when the liquid crystal shutter means blocks light transmission in the selected area. Item 9. A display device for a mobile phone according to Item 8. A mobile phone equipped with a liquid crystal display device,
The liquid crystal display device,
A light-transmitting panel that forms the surface of the display screen, a color filter, a transparent electrode, a liquid crystal layer, a polarizing plate, and a backlight,
It is located between the polarizing plate and the backlight, and reflects light incident from the surface side of the light transmitting panel when the backlight is turned off, and transmits light of the backlight when the backlight is turned on to display an image. A translucent mirror layer to enable
A control is arranged on the entire display area between the translucent mirror layer and the backlight to enable or block light transmission between the translucent mirror layer and the backlight in an arbitrary selected area on the display screen. And a possible aperture layer,
When the backlight is turned off, the entire area of the display screen becomes a mirror,
When the backlight is turned on and an image is displayed, the selected area becomes a mirror to perform image display in another area by light blocking control in the aperture layer, and the display is performed by light transmission control in the aperture layer. A mobile phone characterized in that an image is displayed on the entire screen. The mobile phone further includes a CCD camera,
The CCD camera is disposed at a position facing the liquid crystal display device on the main body of the mobile phone, and is mounted so that the angle of view can be freely changed with the rotation of an arm supporting the CCD camera. The mobile phone according to claim 10, wherein: A display image displayed on the liquid crystal display device, and an image reflected on the mirror with the selected area being a mirror by light blocking control on the aperture layer are configured to be captured by the CCD camera. The mobile phone according to claim 11. Image data storage means for storing image data captured by the CCD camera;
Communication means for transmitting the image data to a mobile phone of a call destination;
The mobile phone according to claim 12, further comprising: 14. The mobile phone according to claim 13, wherein the mobile phone downloads image data from outside via a communication network based on a TCP / IP protocol and displays the image data on the liquid crystal display device. 11. The mobile phone according to claim 10, wherein when the power switch of the mobile phone is turned off, a signal for making the liquid crystal layer transparent is applied at the same time as turning off the backlight of the liquid crystal. . The selection area is set on the display screen by designating one shape selected from a plurality of preset shapes, a scale of the selected shape, and an arrangement position thereof. The mobile phone according to claim 10, wherein: 17. The mobile phone according to claim 16, further comprising cursor means for selecting the plurality of preset shapes, selecting the scale, and designating the arrangement position. When the backlight is lit and an image is displayed, a mirror mode in which only the selected area becomes a mirror and image display is performed in another area by light blocking control in the aperture layer, or light in the aperture layer is displayed. 18. The mobile phone according to claim 17, further comprising mode selection means for selecting a display mode in which an image is displayed on the entire display screen by the transmission control.

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