JP2007133092A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simultaneously display separated images on a plurality of display means in a configuration having the plurality of the display means without increasing a circuit scale compared to a configuration having a single display means. <P>SOLUTION: A first display unit 1 and a second display unit 2 are connected in parallel to a display signal generating unit 6. The display signal generating unit 6 supplies image data (RGB data) inputted from a DMA (direct memory access) unit 5 together with image synchronizing signals (horizontal synchronizing signals, vertical synchronizing signals and pixel clocks) according to predetermined timing instructed by a control unit 3 to the first display unit 1 and the second display unit 2 in parallel. In this stage, the image data and image synchronizing signals relating to images to be displayed in the first display unit 1 and the second display unit 2 are transferred in a time-sharing way through a common signal line. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a display device suitable for use in an electronic device or the like provided with a plurality of display means.

  2. Description of the Related Art In recent years, electronic devices typified by a foldable mobile phone that have a plurality of display means (for example, liquid crystal displays) have been widely used. For example, in a foldable mobile phone, at least one of the plurality of display means is arranged at a position where it can be seen even when the casing is folded. Thereby, various information such as time and radio wave state can be confirmed with the housing folded, which contributes to improvement of convenience for the user.

  However, the provision of a plurality of display means in an electronic device generally increases the circuit scale as compared with a case where only a single display means is provided. With respect to this problem, a method for reducing the circuit scale of an electronic device including a plurality of display means has been proposed (for example, see Patent Document 1).

  In the display controller disclosed in Patent Document 1, a memory for storing display data to be supplied to a plurality of display units is provided in common to the plurality of display units, and the display data stored in the memory is stored in a plurality of units. A selector for switching to which of the display means is provided is provided.

JP 2003-229953 A

  The display controller disclosed in Patent Document 1 requires a selector that switches which display data stored in the memory is supplied to which of the plurality of display means, and further individually interfaces with the plurality of display means. Are provided, and these increase the circuit scale. Further, signal lines for supplying display data to a plurality of display means are individually provided, which also results in an increase in circuit scale.

  The present invention has been made in view of the above circumstances, and in a configuration including a plurality of display means, a plurality of display means are caused without causing an increase in circuit scale as compared with a case where a single display means is provided. An object of the present invention is to provide a display device capable of simultaneously displaying separate images.

  The display device of the present invention comprises a plurality of display means and a display signal supply means for supplying image data and an image synchronization signal to the plurality of display means, and the plurality of display means output from the display signal supply means. Connected in parallel to a signal line for transmitting image data and an image synchronization signal, and the display signal supply means supplies the image data in a time division manner to the plurality of display means through the common signal line It is.

  Thereby, in a configuration including a plurality of display means, separate images are simultaneously displayed on the plurality of display means without causing an increase in circuit scale as compared with a case where a single display means is provided. It becomes possible. As an increase in circuit scale, for example, it is possible to drive a plurality of display means without requiring an additional circuit or causing an increase in the number of signals to be wired, and when this display device is mounted with an electronic device. It is possible to improve the convenience of an electronic device provided with a plurality of display means.

  Further, the present invention is the display device described above, wherein the display signal supply unit is configured to time-divide image data in a vertical direction in units of lines for each display period of each display unit in the plurality of display units. Supply shall be performed.

  Thereby, for each display period of each display means, it is possible to supply image data in a time-division manner through a common signal line to a plurality of display means by time-sharing in units of lines in the vertical direction. It is possible to simultaneously display separate images on a plurality of display means.

  Further, the present invention is the display device described above, wherein the display signal supply unit is configured to time-divide image data in a horizontal direction in units of pixels for each display period of each display unit in the plurality of display units. Supply shall be performed.

  Thereby, for each display period of each display means, it is possible to supply image data in a time-division manner through a common signal line to a plurality of display means by time-division in units of pixels in the horizontal direction. It is possible to simultaneously display separate images on a plurality of display means.

  Further, the present invention is the above-described display device, wherein the display signal supply means supplies the display signal data to the common signal line together with an image synchronization signal according to a predetermined timing corresponding to the image data. To a display signal generator for outputting to the plurality of display means.

  As a result, the display signal generator outputs the image data for display and the image synchronization signal according to a predetermined timing corresponding to the image data to the plurality of display means from the common signal line. It is possible to simultaneously drive a plurality of display means connected in parallel to the lines and simultaneously display an image on each of them.

The present invention also provides an electronic device comprising the display device described above.
Moreover, this invention provides a telephone apparatus provided with the said display apparatus.
Moreover, this invention provides an information terminal device provided with the display apparatus of the said description.
Moreover, this invention provides a mobile station apparatus provided with the display apparatus of the said description.
Moreover, this invention provides a mobile communication system provided with the said mobile station apparatus.

  According to the present invention, in a configuration provided with a plurality of display means, separate images are respectively displayed for the plurality of display means without causing an increase in circuit scale as compared with a case where a single display means is provided. A display device capable of displaying simultaneously can be provided.

(First embodiment)
FIG. 1 is a block diagram showing a configuration of a display device according to the first embodiment of the present invention.

  The display device according to the present embodiment includes a first display unit 1, a second display unit 2, a control unit 3, a storage unit 4, a DMA unit 5, and a display signal generation unit 6 as main components. Configured.

  The first display unit 1 performs image display according to the image data and the image synchronization signal input from the display signal generation unit 6. The second display unit 2 performs image display according to the image data and the image synchronization signal input from the display signal generation unit 6. These display units have a two-dimensional display area such as a liquid crystal display device (liquid crystal display), and are configured by display means for displaying characters, icons, other images, and the like in this display area.

  The control unit 3 is configured by a processor or the like, and is connected to the storage unit 4 and the DMA unit 5 via the bus 100. The control unit 3 generates image data to be displayed on the first display unit 1 or the second display unit 2 and writes the image data to the storage unit 4, controls the operation of the DMA unit 5, and controls the first display unit. It supervises the overall operation of the display device of the present embodiment, such as control of display start and stop of the first and second display units 2.

  The storage unit 4 is configured by an image memory or the like, and stores image data generated by the control unit 3. A DMA (Direct Memory Access) unit 5 reads out image data stored in the storage unit 4 and transfers the direct memory access to the display signal generation unit 6 in accordance with an instruction from the control unit 3.

  The display signal generation unit 6 sends the image data input from the DMA unit 5 to the first display unit 1 and the second display unit 2 together with an image synchronization signal according to a predetermined timing instructed by the control unit 3. Output.

  Here, the image data and the image synchronization signal are supplied to the first display unit 1 and the second display unit 2 from the display signal generation unit 6 through a common signal line. That is, the first display unit 1 and the second display unit 2 are connected in parallel to the same signal line. In the example of FIG. 1, the RGB data 101 is an image signal, and the horizontal synchronization signal 102, the vertical synchronization signal 103, and the pixel clock 104 are image synchronization signals from the display signal generator 6 to the first display unit 1 and the first synchronization signal. Are output to the two display units 2 in common.

  As described above, the present embodiment has a configuration in which a plurality of display units are connected in parallel to a signal line for transmitting image data and an image synchronization signal. In the common signal line, the image data transmitted from the display signal generation unit 6 is supplied in a time division manner to the image data corresponding to each display unit. Thereby, as compared with a display device provided with a single display means, a configuration including a plurality of display means without requiring an additional circuit and without increasing the number of signals to be wired can be realized.

  2 to 4 are diagrams illustrating a first example of signal timing of the display device according to the first embodiment. 2 to 4, the horizontal axis represents time. 2 to 4, the same reference numerals are assigned to the same signals as those in FIG.

  2 to 4 show the timing of the image data and the image synchronization signal output from the display signal generation unit 6 to the first display unit 1 and the second display unit 2 in the display device of the present embodiment. Yes.

  FIG. 2 is a diagram illustrating the timing at which the RGB data 101 is transferred in synchronization with the horizontal synchronization signal 102 and the vertical synchronization signal 103. The RGB data 101 is image data displayed on the first display unit 1 and the second display unit 2.

  In FIG. 2, the image data displayed on the first display unit 1 is transferred in the first vertical display period 20. The first vertical display period 20 is defined by the first vertical back porch 22 and the first vertical front porch 23 with the vertical synchronization signal 103 as a reference. Similarly, the image data displayed on the second display unit 2 is transferred to the second vertical display period 21. The second vertical display period 21 is defined by the second vertical back porch 24 and the second vertical front porch 25 with the vertical synchronization signal 103 as a reference.

  Here, the first vertical back porch 22, the first vertical front porch 23, the second vertical back porch 24, and the second vertical front porch 25 are connected to the first vertical display period 20 and the second vertical porch 25, respectively. The vertical display period 21 is set to be exclusive in time. That is, the image data is transferred to the first display unit 1 and the second display unit 2 in a time division manner through the RGB data 101 which is the same signal line.

  FIG. 3 shows an example of signal timing obtained by enlarging the period A shown in FIG. The A period is a part of the first vertical display period 20, and the RGB data 101 transferred during this period is image data to be displayed on the first display unit 1. FIG. 3 shows the timing at which the RGB data 101 is transferred in synchronization with the horizontal synchronization signal 102 and the pixel clock 104.

  In FIG. 3, the image data displayed on the first display unit 1 is transferred in the first horizontal display period 30. The first horizontal display period 30 is defined by the first horizontal back porch 32 and the first horizontal front porch 33 with the horizontal synchronization signal 102 as a reference.

  FIG. 4 shows an example of signal timing obtained by enlarging the period B shown in FIG. The period B is a part of the second vertical display period 21, and the RGB data 101 transferred during this period is image data to be displayed on the second display unit 2. FIG. 4 shows the timing at which the RGB data 101 is transferred in synchronization with the horizontal synchronization signal 102 and the pixel clock 104.

  In FIG. 4, the image data displayed on the second display unit 2 is transferred to the second horizontal display period 31. The second horizontal display period 31 is defined by the second horizontal back porch 34 and the second horizontal front porch 35 with the horizontal synchronization signal 102 as a reference.

  5 and 6 are diagrams illustrating a second example of signal timing of the display device according to the first embodiment. 5 and 6, the horizontal axis indicates time. 5 and 6, the same reference numerals are assigned to the same signals as those in FIG.

  5 and 6 show the timing of the image data and the image synchronization signal output from the display signal generation unit 6 to the first display unit 1 and the second display unit 2 in the display device of this embodiment. Yes.

  FIG. 5 is a diagram illustrating the timing at which the RGB data 101 is transferred in synchronization with the horizontal synchronization signal 102 and the vertical synchronization signal 103. The RGB data 101 is image data displayed on the first display unit 1 and the second display unit 2.

  In FIG. 5, the image data displayed on the first display unit 1 is transferred in the first vertical display period 20. The first vertical display period 20 is defined by the first vertical back porch 22 and the first vertical front porch 23 with the vertical synchronization signal 103 as a reference. Similarly, the image data displayed on the second display unit 2 is transferred to the second vertical display period 21. The second vertical display period 21 is defined by the second vertical back porch 24 and the second vertical front porch 25 with the vertical synchronization signal 103 as a reference.

  FIG. 6 shows an example of signal timing obtained by expanding the C period shown in FIG. The C period is a part of the first vertical display period 20 and the second vertical display period 21, and the RGB data 101 transferred during this period is transferred to the first display unit 1 and the second display unit 2. This is the image data to be displayed. FIG. 6 shows the timing at which the RGB data 101 is transferred in synchronization with the horizontal synchronizing signal 102 and the pixel clock 104.

  In FIG. 6, the image data displayed on the first display unit 1 is transferred during the first horizontal display period 30. The first horizontal display period 30 is defined by the first horizontal back porch 32 and the first horizontal front porch 33 with the horizontal synchronization signal 102 as a reference.

  In FIG. 6, the image data displayed on the second display unit 2 is transferred to the second horizontal display period 31. The second horizontal display period 31 is defined by the second horizontal back porch 34 and the second horizontal front porch 35 with the horizontal synchronization signal 102 as a reference.

  Here, the first horizontal back porch 32, the first horizontal front porch 33, the second horizontal back porch 34, and the second horizontal front porch 35 are connected to the first horizontal display period 30 and the second horizontal porch 35. The horizontal display period 31 is set to be exclusive in time. That is, the image data is transferred to the first display unit 1 and the second display unit 2 in a time division manner through the RGB data 101 which is the same signal line.

  As described above, the first example shown in FIGS. 2 to 4 is an example in which the display periods of the first display unit 1 and the second display unit 2 are time-divided in units of lines in the vertical direction. The second example shown in FIGS. 5 and 6 is an example in which the display periods of the first display unit 1 and the second display unit 2 are time-divided in units of pixels in the horizontal direction.

  The first example shown in FIGS. 2 to 4 can relatively reduce the number of pixel clocks 104 in one period of the horizontal synchronizing signal 102, but the number of horizontal synchronizing signals 102 in one period of the vertical synchronizing signal 103 (line Number) is relatively large. On the other hand, the second example shown in FIGS. 5 and 6 can relatively reduce the number of horizontal synchronization signals 102 (number of lines) in one cycle of the vertical synchronization signal 103, but the pixel in one cycle of the horizontal synchronization signal 102. The number of clocks 104 is relatively large.

  The effect of this embodiment is the same in any example, but it is possible to properly use the timing when time-dividing the signal supplied to each display unit according to the device configuration such as the characteristics of the display unit. is there.

  Here, the control for generating the timing of the image data and the image synchronization signal shown in FIGS. That is, the control unit 3 instructs the display signal generation unit 6 to specify the timing of a predetermined image synchronization signal, and then controls the DMA unit 5 during the display period of the first display unit 1 to control the first from the storage unit 4. Image data to be displayed on the display unit 1 is read out and supplied to the first display unit 1 through the display signal generation unit 6. Similarly, in the display period of the second display unit 2, the control unit 3 controls the DMA unit 5 to read image data to be displayed on the second display unit 2 from the storage unit 4 and display signal generation unit 6. To the second display unit 2.

  At this time, the control unit 3 generates image data to be displayed on the first display unit 1 and the second display unit 2 and writes them to separate areas of the storage unit 4, and the DMA unit 5 stores the storage unit 4. As an area from which image data is read out, the control unit 3 designates an area in which image data for each display unit previously generated is written. Thereby, it is possible to simultaneously display arbitrary images on the first display unit 1 and the second display unit 2 respectively.

  Furthermore, if the control unit 3 indicates the same area to the first display unit 1 and the second display unit 2 as an area from which the DMA unit 5 reads image data from the storage unit 4, it is the same for each display unit. These images can be displayed simultaneously. As described above, the display device according to the present embodiment can flexibly cope with various image displays on a plurality of display units.

  The vertical and horizontal front porch and back porch that define the display periods of the first display unit 1 and the second display unit 2 may have predetermined values for each display unit, Or you may make it prescribe | regulate by the control part 3 instruct | indicating each display part.

  When the vertical and horizontal front porch and back porch have predetermined values specific to each display unit, the control unit 3 displays the signals so as to generate timing signals according to the values determined for each display unit. An instruction is given to the signal generator 6. In this case, the control signal 105 for controlling the first display unit 1 and the control signal 106 for controlling the second display unit 2 are, for example, a simple signal on one signal line. And OFF may be indicated by the logic of each control signal.

  On the other hand, when the control unit 3 specifies each vertical and horizontal front porch and back porch to each display unit, the control unit 3 controls the display signal generating unit 6, the first display unit 1, and the second pouch. By performing the same setting on the display unit 2, the display period of each display unit is managed in an integrated manner. In this case, the control signal 105 for controlling the first display unit 1 and the control signal 106 for controlling the second display unit 2 are information on a plurality of bits, such as a serial interface. The signal may be a signal that can be instructed.

  As a matter of course, in the display device of this embodiment, only one of the first display unit 1 and the second display unit 2 can be displayed. In this case, the display of only one display unit is turned on by the control of the control signal 105 and the control signal 106 to each display unit, and the control unit 3 displays the display signal generation unit only for the display period corresponding to the display unit that is turned on. 6 to output image data.

  Note that the resolution (number of lines in the vertical direction × number of pixels in the horizontal direction) of the first display unit and the second display unit can be arbitrarily set independently.

  Furthermore, in the first embodiment, two examples are shown as the number of display units provided, but even when there are three or more display units, these are connected in parallel to the same signal line. The same effect can be obtained by supplying image data to the division.

  In the first embodiment, the example in which the vertical and horizontal front porch and the back porch are used to define the display period of each display unit has been described. However, the present invention is not limited to this. As long as the display period of each display unit can be uniquely determined, the same effect can be obtained by any defining method. For example, the vertical display period may be defined as either the vertical front porch or the vertical back porch and the number of data transfer lines (the number of cycles of the horizontal synchronization signal). Similarly, the definition of the display period in the horizontal direction may be one of the horizontal front porch or the horizontal back porch and the number of data transfers (number of pixel clocks).

  As described above, in the display device according to the present embodiment, a plurality of display units are connected in parallel to the image data and the image synchronization signal output from the display signal generation unit 6, and image data corresponding to each display unit is stored. By supplying in a time-sharing manner, it is possible to provide a plurality of display means without requiring an additional circuit and without increasing the number of signals to be wired as compared with a display device having a single display means. Become. Moreover, it is possible to display separate images on a plurality of display means simultaneously. For this reason, it contributes to the convenience improvement of the electronic device provided with the some display means.

(Second Embodiment)
As a second embodiment, a configuration example of a mobile phone device that is an electronic device including the display device of the first embodiment will be described. FIG. 7 is a block diagram showing a configuration of a mobile phone device including a display device according to the second embodiment of the present invention. 7, the same blocks and signals as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.

  The cellular phone device according to the present embodiment includes a first display unit 1, a second display unit 2, a control unit 3A, a storage unit 4, a DMA unit 5, a display signal generation unit 6, an antenna 70, and the like. The RF unit 71, the baseband signal processing unit 72, the audio codec unit 73, the receiver 74, and the microphone 75 are provided as main components.

  The antenna 70 receives a radio signal and outputs it as a received signal to the RF unit 71, and transmits a transmission signal output from the RF unit 71. The RF unit 71 down-converts the reception signal output from the antenna 70 to a baseband frequency and outputs the baseband signal to the baseband signal processing unit 72, and converts the transmission signal output from the baseband signal processing unit 72 to a radio frequency. Up-convert and output to the antenna 70. The baseband signal processing unit 72 demodulates the reception signal output from the RF unit 71 and outputs the demodulated signal to the control unit 3A, and modulates the transmission signal output from the control unit 3A and outputs the modulated transmission signal to the RF unit 71.

  The control unit 3A has a function related to display control similar to that of the control unit 3 of the first embodiment. Further, the control unit 3 </ b> A outputs audio encoded data that is a reception signal output from the baseband signal processing unit 72 to the audio codec unit 73. Further, the control unit 3A outputs the audio encoded data output from the audio codec unit 73 to the baseband signal processing unit 72 as a transmission signal.

  The audio codec unit 73 decodes the audio encoded data output from the control unit 3A, outputs the obtained audio signal to the receiver 74, and encodes the audio signal output from the microphone 75. The voice encoded data is output to the control unit 3A. The receiver 74 outputs the audio signal output from the audio codec unit 73 as audio. The microphone 75 inputs voice and outputs it as a voice signal to the voice codec unit 73.

  Next, the operation of the mobile phone device of this embodiment will be described. A reception signal received by the antenna 70 is output to the control unit 3A via the RF unit 71 and the baseband signal processing unit 72. The received audio encoded data is output to the audio codec unit 73 by the control unit 3A, and an audio signal is generated from the audio encoded data in the audio codec unit 73 and output to the receiver 74. As a result, the received voice is reproduced and output from the receiver 74.

  The audio signal input from the microphone 75 is encoded by the audio codec unit 73 and output to the control unit 3A. Then, the encoded audio data is output as a transmission signal by the control unit 3A to the baseband signal processing unit 72 and transmitted through the RF unit 71 and the antenna 70. As a result, a radio communication signal of the transmitted voice is output from the antenna 70.

  The first display unit 1 and the second display unit 2 have a control unit 3A, a storage unit 4, a DMA unit 5, and a display signal generation unit 6 by the same functions as those described in the first embodiment. Separate images are displayed at the same time by this operation.

  Thus, in the mobile phone device that is an electronic device equipped with the display device of the present embodiment, a plurality of display units are connected in parallel to the image data and the image synchronization signal output from the display signal generating unit 6, respectively. By supplying image data corresponding to the display unit in a time-sharing manner, it is possible to provide a plurality of signals without requiring an additional circuit and without increasing the number of signals to be wired as compared with a display device having a single display means. The display means can be provided. Moreover, it is possible to display separate images on a plurality of display means simultaneously. For this reason, it contributes to the convenience improvement of the electronic device provided with the some display means.

  As a specific usage example of the mobile phone device provided with the display device of the present embodiment, a game application for displaying separate images on the screens of the two display units, a telephone number is given to the first display unit at the time of outgoing / incoming calls Display effect for displaying and displaying animation on the second display unit at the same time, such as displaying a clock and outgoing / incoming data on the second display unit while watching TV or moving image content on the first display unit For information provision purposes, the photographed image can be viewed even by the person who is the subject by displaying the preview image at the same time on the first display unit facing the photographer and the second display unit facing the subject when shooting the camera. Various applications that improve the convenience of the user, such as an application that realizes a function that can be performed, are conceivable, and the present embodiment can be applied to these functions.

  Note that the display device of the present invention can be applied to various devices including a plurality of display means such as an electronic device, a telephone device, an information terminal device, a mobile station device, and a mobile communication system.

  As described above, according to this embodiment, in a display device suitable for an electronic device including a plurality of display means, an additional circuit is not required as compared with a display device including a single display means. In addition, it is possible to provide a plurality of display means without increasing the number of signals to be wired, and simultaneously display separate images on the plurality of display means. Thereby, the convenience of the electronic apparatus provided with the several display means can be improved.

  In addition, according to the present embodiment, it is possible to reduce the size of an electronic device, a telephone device, an information terminal device, a mobile station device, a mobile communication system, and the like provided with a plurality of display means.

  According to the present invention, in a configuration including a plurality of display means, separate images are simultaneously displayed on the plurality of display means without causing an increase in circuit scale as compared with a case where a single display means is provided. It is useful for a display device suitable for use in an electronic device or the like having a plurality of display means.

The block diagram which shows the structure of the display apparatus which concerns on the 1st Embodiment of this invention. The figure which shows the 1st example of the signal timing of the display apparatus which concerns on 1st Embodiment. The figure which shows the 1st example of the signal timing of the display apparatus which concerns on 1st Embodiment. The figure which shows the 1st example of the signal timing of the display apparatus which concerns on 1st Embodiment. The figure which shows the 2nd example of the signal timing of the display apparatus which concerns on 1st Embodiment. The figure which shows the 2nd example of the signal timing of the display apparatus which concerns on 1st Embodiment. The block diagram which shows the structure of the mobile telephone apparatus provided with the display apparatus which concerns on the 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st display part 2 2nd display part 3, 3A Control part 4 Memory | storage part 5 DMA part 6 Display signal generation part 20 1st vertical display period 21 2nd vertical display period 22 1st vertical back porch 23 First vertical front porch 24 Second vertical back porch 25 Second vertical front porch 30 First horizontal display period 31 Second horizontal display period 32 First horizontal back porch 33 First horizontal front porch 34 First 2 horizontal back porches 35 second horizontal front porch 70 antenna 71 RF unit 72 baseband signal processing unit 73 audio codec unit 74 receiver 75 microphone 100 bus 101 RGB data 102 horizontal synchronization signal 103 vertical synchronization signal 104 pixel clock 105 control signal 106 Control signal

Claims (9)

A plurality of display means;
Display signal supply means for supplying image data and an image synchronization signal to the plurality of display means,
The plurality of display means are connected in parallel to a signal line for transmitting image data and an image synchronization signal output from the display signal supply means,
The display signal supply means supplies image data in a time-sharing manner to the plurality of display means through the common signal line. The display device according to claim 1,
The display signal supply unit is a display device that supplies image data in a time-division manner in units of lines in the vertical direction for each display period of each display unit in the plurality of display units. The display device according to claim 1,
The display signal supply unit supplies image data in a time-divided manner in units of pixels in the horizontal direction for each display period of each display unit in the plurality of display units. The display device according to claim 1,
The display signal supply means outputs a display signal generator for outputting display image data to the plurality of display means from the common signal line together with an image synchronization signal according to a predetermined timing corresponding to the image data. Display device.   An electronic device comprising the display device according to claim 1.   A telephone device comprising the display device according to claim 1.   An information terminal device comprising the display device according to claim 1.   A mobile station apparatus comprising the display device according to claim 1.   A mobile communication system comprising the mobile station apparatus according to claim 8.

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