JP2003009032A - Portable equipment with tv function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable equipment with TV function, which reduces the power consumption by reducing the number of synthesizing circuits (display switching parts) in an analog circuit to reduce the number of signal lines and simplifying the circuit and reducing the number of digital-analog converters. SOLUTION: The portable equipment with TV function is provided with a display control part 40, and the display control part 40 is provided with a screen display control part 56 which reads out image data from a frame memory 42 and outputs it as an image signal, a memory 52 for OSD where display data of OSD is stored, an OSD display control part 54 which reads out display data of OSD from the memory 52 for OSD and outputs it as an image signal, a display switching part 58 which takes the output of the screen display control part 56 and that of the OSD display control part 54 as the inputs and switches these inputs on the basis of a first control signal to composite them, and a digital-analog converter 60 which converts the output of the display switching part 58 to an analog signal and outputs it to the display part 23 side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable device having a TV function, and more particularly to controlling an OSD (On Screen Display).

[0002]

2. Description of the Related Art FIG. 12 is a circuit diagram showing an outline of a portable device with a TV function, which is the background of the present invention. This T
The V-function portable device is capable of selectively displaying both a TV screen processed by a TV tuner and a digital image captured by a digital camera or the like.
OSD (on-screen display) can be performed on both the TV screen and the digital image.

A device control unit (CPU) 50 takes in image data stored in, for example, a memory card (not shown), and a voice / image reproduction unit (DSP) 38 decompresses the image data and writes it in the VRAM 42. Expand the displayed image with. The screen display control unit 56 outputs the image data written in the VRAM 42 as an image signal to the display switching unit 19 via the digital-analog converter 60. The image signal from the television processing circuit 15 is also input to the display switching unit 19, and any image signal is selected and output according to the set operation mode. Further, OSD display data is stored in the OSD memory 52, and the OSD display control unit 53
Reads the display data and outputs it as an image signal to the display switching unit 19a via the digital-analog converter 61. The image signal of the TV screen or the image signal of the digital surface and the image signal for OSD are input to the display switching unit 19a, and these image signals are appropriately switched according to the pixels of the image signal for OSD. The image is output, and the OSD image is displayed on the image on the TV screen or the digital surface on the display unit 23.

[0004]

In the portable device with the TV function as described above, the number of synthesizing circuits (display switching units 19 and 19a) in the analog circuit increases, and the signal line for selection (synthesis) control increases. However, there is a problem that the circuit becomes complicated because the number increases. In addition, the number of digital-analog converters is large, power consumption increases, and it is not suitable for mobile devices.

The present invention has been made to solve such a problem, and reduces the number of synthesis circuits (display switching sections) in an analog circuit to reduce the number of signal lines,
By simplifying the circuit and reducing the number of digital / analog converters, it has become possible to reduce power consumption.
The purpose is to obtain a portable device with a V function.

[0006]

(1) A portable device with a TV function according to one aspect of the present invention includes an image signal of a display image formed of a digital signal and an OSD formed of the digital signal.
(On-screen display) image signal is synthesized based on a first control signal depending on a preset operation mode, and the synthesized image signal is converted into an analog signal and output to the display device side. It is equipped with a control device. In the present invention, both the image signal of the display image and the image signal of the OSD are in the state of digital signals, and these image signals are combined in the state of digital signals. The number of synthesizing circuits is decreasing, and the number of signal lines is decreasing. as a result,
The circuit can be simplified. In addition, since the number of digital / analog converters is reduced, it is possible to reduce power consumption.

(2) In the portable device with a TV function according to another aspect of the present invention, the display control device performs the first control corresponding to the OSD image signal when the operation mode is set to a predetermined mode. A signal is generated and the image signal of the display image and the image signal of the OSD are combined. In the present invention, for example, when the operation mode is set to the mode for displaying the image data of the external storage device, the OSD
The first control signal corresponding to the image signal of 1 is generated, and the image signal of the display image and the image signal of the OSD are switched and combined based on the control signal. That is, a composite image signal in which the OSD image signal is superimposed on the image signal of the display image is generated.

(3) In a portable device with a TV function according to another aspect of the present invention, the display control device includes a screen display control means for reading out the image data stored in the frame memory and outputting it as an image signal, and an OSD. OSD storage means for storing display data, and OS from the OSD storage means
O for reading the display data of D and outputting it as an image signal
SD display control means, output of screen display control means and OSD
The output of the display control means is input, and the first combining means for combining these inputs based on a first control signal depending on a preset operation mode, and the output of the first combining means are analog. And a digital / analog converter for converting the signal into a signal and outputting the signal to the display device side. In the present invention, the screen display control means reads the image data stored in the frame memory, converts the image data into an image signal, and outputs the image signal.
In addition, the OSD display control means stores the OS in the OSD storage means.
The display data of D is read and output as an image signal.
The first synthesizing means inputs the output of the screen display control means and the output of the OSD display control means (both are in the state of digital signals), and these inputs are the first control depending on a preset operation mode. The signals are combined on the basis of the signals, and for example, a combined image signal in which the OSD image signal is superimposed on the image signal of the display image is generated. Then, the digital-analog converter converts the output of the first combining means into an analog signal,
Output and display on the display device side.

(4) A portable device with a TV function according to another aspect of the present invention displays an operation section for performing various operations and at least displaying image data in an external storage device by operating the operation section. Alternatively, when any one of the operation modes of displaying the television image is set, the operation mode is further taken in and stored therein. In the present invention, when the operation mode of displaying the image data of the external storage device or displaying the television image is set by the operation of the operation unit, the calculating means captures the operation mode. The display control device stores the data and performs processing corresponding to the operation mode.

(5) In the portable device with TV function according to another aspect of the present invention, the OSD display control means, when the operation mode is set to the mode for displaying the image data of the external storage device, the OSD display control means. The first control signal composed of a pulse having a timing corresponding to the pixel of the display data is generated and output to the first synthesizing unit. In the present invention, when the operation mode is set to the mode for displaying the image data of the external storage device, the OSD display control means comprises the first pulse signal having the timing corresponding to the pixel of the OSD display data. A control signal is generated and output to the first synthesizing means, and the first synthesizing means is based on the first control signal, and the OSD image signal is superimposed on the image signal of the display image. Generate and output a signal.

(6) A portable device with a TV function according to another aspect of the present invention further comprises image reproducing means for decompressing the image data read from the external storage device and storing it in the frame memory. In the present invention, the image reproduction means decompresses and reproduces the image data read from the external storage device (for example, a memory card), stores it in the frame memory, and expands the display image.

(7) In a portable device with a TV function according to another aspect of the present invention, the first synthesizing means has three primary color image signals from the screen display control means and three primary color signals from the OSD display control section. It is composed of three selectors which respectively input the image signal and switch based on the first control signal. In the present invention, the three selectors respectively input the image signals of the three primary colors from the screen display control means and the image signals of the three primary colors from the OSD display control unit, and switch based on the first control signal. As a result, the image signals of the three primary colors are combined and output.

(8) A portable device with a TV function according to another aspect of the present invention incorporates a register, and the OS is provided in the register.
When the display data of D is written, the control unit further reads the data and stores it in the OSD storage means. In the present invention, when the display data of the OSD is written in the built-in register, the control unit reads the data and stores it in the storage means for OSD.

(9) In the portable device with a TV function according to another aspect of the present invention, when a predetermined screen is displayed on the display device, the calculating means generates OSD display data corresponding to the screen. Write to the register of the above control unit. The display data written in this register is O
It is stored in the SD storage means.

(10) In the portable device with a TV function according to another aspect of the present invention, when a predetermined operation is performed by the operation unit, the calculation means generates the OSD display data corresponding to the operation to generate the OSD display data. Write to the register of the control unit.
The display data written in this register is stored in the OSD storage means by the control unit.

(11) A portable device with a TV function according to another aspect of the present invention inputs an image signal of a television image and an image signal from a display control device, and presets these image signals as described above. It further comprises second synthesizing means for synthesizing based on the second control signal corresponding to the operation mode and outputting to the display device side. In the present invention, the second synthesizing means is
An image signal of a television image and an image signal from the display control device are input, these image signals are combined based on the second control signal corresponding to the preset operation mode, and the result is displayed on the display device side. Output and display. For example, when the operation mode is set to the mode for displaying the image data of the external storage device, the second synthesizing means outputs the output of the display control device to the display device, and the display device stores the output of the external storage device. The OSD image is displayed on the image corresponding to the image data. Further, when the operation mode is set to the mode for displaying the television image, the second synthesizing means outputs the image signal of the television image and the image signal of the OSD to the display device as necessary, and the display device. Displays the OSD image on the TV image.

(12) In the portable device with TV function according to another aspect of the present invention, the OSD display control means displays when the operation mode is set to the mode for displaying the image data of the external storage device. A second control signal for directly outputting the image signal from the control device is generated and output to the second synthesizing means.

(13) In the portable device with TV function according to another aspect of the present invention, the OSD display control means, when the operation mode is set to the mode for displaying a television image, displays the OSD image signal. A first control signal for outputting as it is is generated and output to the first synthesizing means.

(14) In the portable device with a TV function according to another aspect of the present invention, the OSD display control means, when the operation mode is set to the mode for displaying the television image, displays the OSD image signal. A second control signal composed of a pulse signal having a timing corresponding to the pixel is generated and output to the second synthesizing means. In the present invention, the second synthesizing means generates a synthetic image signal in a state where the OSD image signal is superimposed on the image signal of the television image and outputs the synthetic image signal to the display device to display the OSD image on the television image. Display it.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. FIG. 5 is a block diagram showing a configuration of a mobile device with a TV function according to the first embodiment of the present invention. This portable device with a TV function includes an antenna 10, a TV tuner 12, an IF / chroma processing unit 14, a sound detection unit 16, a display switching device 18, a liquid crystal controller 2.
0, liquid crystal display panel (LCD panel) 22, FM tuner 24, audio amplifier 26, audio generator 28, device controller (CPU) 30, memory card IF 32, operation unit 34,
Operation unit IF 36, audio / image reproduction unit 38, display control unit 4
0, VRAM (frame memory) 42, RAM 44, and ROM 46.

The electric wave received by the antenna 10 is T
Tuning is performed by the V tuner 12, the image signal (video signal) of the television is demodulated by the IF / chroma processing unit 14, and the audio signal is detected by the audio detection unit 16. The image signal (video signal) demodulated by the IF / chroma processing unit 14 is sent to the liquid crystal controller 20 via the display switching device 18 and the television image is displayed on the liquid crystal panel 22. The TV tuner 12 and the IF described above
The chroma processing unit 14 constitutes the television processing circuit 15, and the liquid crystal controller 20 and the liquid crystal panel 22 constitute the display unit 23.

The audio signal detected by the audio detection unit 16, the audio signal tuned by the FM tuner 24, and the audio signal reproduced by the audio / image reproduction unit 38 are input to the audio amplification unit 26 and amplified. The voice is generated by the voice generation unit 28. The audio amplification unit 2
6 selects any one of the input audio signals and amplifies the audio signal in accordance with a control signal from the device control unit (CPU) 30. For example, as will be described later, when the operation mode is set to TV, the audio signal detected by the audio detection unit 16 is selected, and when the operation mode is set to FM radio, the FM tuner 24 is used. The tuned audio signal is selected, and when the operation mode is set to audio or digital camera, the audio signal reproduced by the audio / image reproduction unit 38 is selected.

By the way, the device control section (CPU) 30
Although various calculations are performed according to the operation of the operation unit 34 and the display screen of the display unit 23 is controlled, in the present embodiment, when a predetermined operation is performed among the operations of the operation unit 34. The OSD is displayed on the display unit 23. In addition, the display unit 2
OSD is displayed on a specific display screen among the display screens displayed in 3.
Is considered to be displayed. The OSD displayed in accordance with the operation of the operation unit 34 includes a volume when a volume button described later is operated, a display screen brightness adjustment amount when a jog switch is operated, a television channel, and other character information. In addition, O displayed on a specific display screen
As SD, there is a battery remaining amount on the menu screen.

6 (A) and 6 (B) are external views of the portable device with the TV function shown in FIG. 5, FIG. 6 (A) is an external view seen from the front side, and FIG. 6 (B) is an external view seen from the back side. It is a figure. Further, FIG. 7 is an external view of the state in which the cover is opened. A main body 100 of this portable device with a TV function has the circuit shown in FIG. A cover fixing knob 106 is attached to a lower portion of the power lamp 104, and the cover 102 is configured to open by sliding the cover fixing knob 106 downward.
When is opened, the liquid crystal panel 22 appears. A power switch 108, a menu button 110, and a jog switch 112 are attached to the front right side of the main body 100. A volume button 114 is attached to the upper end surface on the front side of the main body 100. A memory card insertion slot 116 is provided on the front left side of the main body 100, and the memory card 48 is inserted therein. The power switch 108, the menu button 110, the jog switch 112, and the volume button 114 described above constitute the operation unit 34 of FIG.

The outline of the portable device with a TV function shown in FIGS. 5 to 7 will be described by focusing on the operation unit 34 and the display unit 23. By sliding the cover fixing knob 106, the cover 102 is opened and the liquid crystal panel 22 appears.
When the power switch 108 is turned on, the power lamp 10
4 is turned on (the lighting circuit of the power lamp 104 is omitted). When the power switch 108 is turned on,
The device control unit (CPU) 30 reads the program written in the ROM 46, and the VRA via the display control unit 40.
A menu screen is created in M (frame memory) 42 and sent to the display unit 23 including the liquid crystal controller 20 and the liquid crystal panel 22 to display the menu screen.

FIG. 8 is an explanatory view of the menu screen at this time. As shown, as a menu (operation mode),
For example, audio, television, FM radio and digital camera are displayed. The operation mode is selected by moving the jog switch 112 up or down. In the example of FIG. 8, the operation mode of the television is selected, and the operation mode is set by pressing the jog switch 112.

FIG. 9 is an explanatory diagram when the jog switch 112 is moved to select the digital camera as the operation mode. By pressing the jog switch 112, the digital camera is set as the operation mode.

FIG. 10 is an explanatory diagram of the processing when shifting from each operation mode to the mode setting. The example of FIG. 10 shows an example of a case of shifting from the operation mode of the television to the setting mode thereof. By long-pressing the menu button 110, a menu for television setting is displayed and the jog switch 112 is turned on. Move down to select brightness and press the jog switch 112 to set that selection. Then, move the jog switch 112 up or down to select the brightness, and then press the jog switch 1
Pressing 12 sets the selection. When selecting this brightness, a number of bars corresponding to the brightness by operating the jog switch 112 are displayed (on-screen display). Then, when returning to the television mode again, the menu button 110 is pressed again.

The process of shifting from the operation mode of the television to the mode setting has been described with reference to FIG.
The same applies to other operation modes of the FM radio and the digital camera.

Next, the operation when the television is set as the operation mode will be described. The radio wave received by the antenna 10 is tuned to a predetermined channel by the TV tuner 12. The IF / chroma processing unit 14 obtains an image signal (video signal) from the tuned signal, demodulates a luminance signal and a color signal of the image signal (video signal) into an image signal of three primary colors, and a display switching device. Send to 18. When the operating mode is set to TV,
The display switching device 18 outputs the image signal from the IF / chroma processing unit 14 to the liquid crystal controller 20. The liquid crystal controller 20 controls the pixels of the liquid crystal panel 22 based on the image signal to display a television image on the liquid crystal panel 22. Further, the audio detector 16 detects an audio signal from a signal tuned to a predetermined channel by the TV tuner 12 and outputs the audio signal to the audio amplifier 26. The audio amplification unit 26 amplifies the audio signal and outputs it to the audio generation unit 28, and the audio generation unit 28 outputs the audio corresponding to the television image on the liquid crystal panel 22.

Further, when the operation mode is set to FM radio, the radio wave received by the antenna 10 is tuned to a predetermined frequency by the FM tuner 24, and its audio signal is output to the audio amplification section 26. . The voice amplifier 26 amplifies the voice signal and outputs it to the voice generator 28, and the voice generator 28 outputs the broadcast voice of the tuned station.

When the operation mode is set to, for example, a digital camera, the image taken by the digital camera is stored in the memory card 48, and the memory card 48 is inserted into the memory card insertion slot 116. Mounting. The device control unit (CPU) 30 is a memory card IF
The audio data (when the audio data is also stored in the memory card 48) and the image data stored in the memory card 48 via 32 are taken in and output to the audio / image reproducing unit 38. The audio / image reproduction unit 38 reproduces the audio data and the image data, outputs the audio signal to the audio amplification unit 26, and outputs the image data to the display control unit 40. The voice amplification unit 26 amplifies the input voice signal and outputs it to the voice generation unit 28, and the voice stored in the memory card 48 is output from the voice generation unit 28. Further, the display control unit 40 stores the image data in the VRAM 42, expands the display image, and then outputs it to the display switching device 18. When the operation mode is set to the digital camera, the display switching device 18 outputs the image signal from the display control unit 40 to the liquid crystal controller 20. The liquid crystal controller 20 controls the pixels of the liquid crystal panel 22 based on the image signal to display the image of the digital camera on the liquid crystal panel 22.

FIG. 1 is a block diagram showing the detailed structure of the display control unit 40 of FIG. 5, and regarding the portions other than the display control unit 40, only the portions necessary for the explanation are shown. FIG. 2 is a configuration diagram of the display switching unit of FIG. Display control unit 40
Is a screen display control unit 56, a CPU control unit 50, an OSD memory 52, an OSD display control unit 54, a display switching unit 58,
It is composed of a digital / analog converter (DAC) 60 and a serial / parallel converter (S / P converter) 62. The display switching unit 58 is composed of selectors 58a to 58c, as shown in FIG.

In the display control unit 40 of FIG. 1, the image data decompressed and reproduced by the audio / image reproduction unit 38 is converted into a parallel signal by a serial / parallel converter (S / P converter) 62. It is written in the VRAM 42 and the display image is developed. For a specific screen such as the above menu screen, the corresponding screen data is read from the ROM 46, written to the register 51 built in the CPU control unit 50 via the device control unit (CPU) 30, and then, The CPU control unit 50 writes the data of the register 51 into the VRAM 42. The screen display control unit 56 reads out the image data from the VRAM 42 and outputs it as an image signal to the display switching unit 58. Device control unit (C
The PU) 30 stores the OSD display data and the like in the register 5 built in the CPU control unit 50 under a predetermined condition.
Write to 1.

The CPU controller 50 writes the display data in the OSD memory 52 because of the OSD written in the register 51. The OSD display control unit 54 uses the OSD memory 52.
The display data is read and output to the display switching unit 58.
The display switching unit 58, based on the control signal from the OSD display control unit 54, outputs the image signal from the screen display control unit 56 and the O signal.
The image signal from the SD display controller 54 is appropriately switched and output to the display switching device 18 via the digital / analog converter 60. The display switching device 18 has a digital
The image signal from the analog converter 60 and the image signal from the TV processing circuit 15 are input, and these image signals are appropriately switched based on the control signal from the OSD display control unit 54 and output to the display unit 23 to obtain a desired signal. The image is displayed.

Next, the processing for displaying the image of the digital surface and the processing for displaying the image of the OSD when the operation mode is set to the digital camera will be described respectively.

(1) Processing when displaying an image on a digital surface (a) The device control unit (CPU) 30 is a memory card 48
The image data stored in is read through the memory card IF 32, and the image data is output to the audio / image reproducing unit 38. The audio / image reproduction unit 38 decompresses and reproduces the image data, writes it in the VRAM 42 via the serial / parallel converter 62, and expands the display image.

(B) The screen display control unit 56 uses the VRAM 4
The image data written in 2 is read and output to the display switching unit 58 as image signals (R, G, B) on the digital surface.

(C) At this time, when the OSD is not displayed, the control signal from the OSD display control section 54 to the selectors 58a to 58c of the display switching section 58 is "0".
(L) is given, and the selectors 58a to 58c of the display switching unit 58 output the image signals (R, G, B) of the digital image from the screen display control unit 50 to the digital / analog converter 60 as they are. , Are converted into analog signals and output to the display switching device 18. When the operation mode is set to the digital camera, the display switching device 1
8 is supplied with a control signal for outputting the output from the display control unit 40 to the display device 23, outputs the output of the digital-analog converter 60 to the display unit 23, and the display unit 23 displays the output of the digital camera. The image is displayed.

(2) Processing for displaying an OSD image (a) For example, when the volume is changed by operating the operation unit 34 (volume button 114), the device control unit (CPU)
30 is a register 5 built in the CPU control unit 50
The display ON of OSD is written in 1 (flag is set). Further, the device control unit (CPU) 30 has a ROM 46.
The display information corresponding to the above operation, the display position, the setting information such as the color, and the like are read from the device, the volume of the volume corresponding to the operation amount is obtained, and the OSD display data and the control data are stored in the register of the CPU controller 50. It stores in 51.

(B) The CPU controller 50 has a register 51.
The OSD display data stored in the
To store.

(C) The OSD display control section 54 reads the OSD display data from the OSD memory 52, and
Based on the control data of the register 51, predetermined color conversion is performed and the OSD image signals (R, G, B) are output to the display switching unit 58. Further, at this time, the OSD display control unit 54 generates a control signal (switching signal) at a timing corresponding to the display position (pixel) of the data based on the control data, and causes the display switching unit 58 to perform the control signal. Output.

(D) The display switching unit 58 outputs the digital image signals (R, G, B) from the screen display control unit 56 and O.
OSD image signals (R, G,
B) is input, and those image signals are appropriately switched based on a control signal from the OSD display control unit 54 and output to the digital / analog converter 60.

FIG. 3 shows image signals (R, G,
6B is a timing chart showing the relationship between B), the OSD image signal (R, G, B), and the control signal. The control signal is O
The signal becomes "1" at the timing corresponding to the display position (pixel) of the SD image signal (R, G, B), and is steadily a digital surface image signal (R, G, B). However, the OSD image signals (R, G, B) are output at the timing when the control signal becomes “1”. Therefore, the output of the display switching unit 58, that is, the output of the digital-analog converter 60 is the image signal (R,
When the OSD image signals (R, G, B) are overlaid on the G, B) to form a composite image signal, and the composite image signal is sent to the display unit 23 via the display switching device 18, the digital camera The OSD is displayed on the image.

Next, the processing for displaying the OSD when the operation mode is set to the television will be described.

(A) A process for changing the channel by operating the operation unit 34 (jog switch 112) will be described. When the jog switch 112 is operated to switch channels, the device control unit (CPU) 3
0 takes in the operation signal via the interface 36 and switches the channel of the television tuner 12 of the television processing circuit 15. The television processing circuit 15 outputs the television image signal (video signal) corresponding to the channel to the display switching device 18.

(B) Further, the device control unit (CPU) 30
When the operation to change the channel is done, CP
The display ON of the OSD is written in the register 51 built in the U control unit 50 (a flag is set). Further, the device control unit (CPU) 30 reads the setting information such as the display mark, the display position, and the color corresponding to the above operation from the ROM 46, obtains the numerical value of the channel corresponding to the operation, and displays the OSD. CPU for data and control data
It is stored in the register 51 of the control unit 50.

(C) The CPU controller 50 has a register 51.
The OSD display data stored in the
To store.

(D) The OSD display control unit 54 reads the display data from the OSD memory 52, and performs a predetermined color conversion based on the control data of the register 51 to perform the OSD image signal (R, G, B). Is output to the display switching unit 58. At this time, a control signal is output from the OSD display control unit 54 to the display switching unit 58. However, since the operation mode is set to television here, the control signal is set to "1" and the OSD image signal ( R, G, B) are directly output to the digital-analog converter 60. The OSD display control unit 54 also outputs a control signal to the display switching device 18. This control signal is a pulse signal corresponding to the pixel of the OSD image signal.

(E) The display switching device 18 receives the image signals (R, G, B) on the television screen from the television processing circuit 15 and O.
OSD image signals (R, G,
B) is input, and those image signals are appropriately switched based on the control signal from the OSD display control unit 54 and output to the display unit 23.

FIG. 4 shows image signals (R, G,
6B is a timing chart showing the relationship between B), the OSD image signal (R, G, B), and the control signal. The control signal is O
The signal becomes "1" at the timing corresponding to the display position (pixel) of the SD image signal (R, G, B), and is steadily the image signal (R, G, B) on the television screen. Is output, but O is output at the timing when the control signal becomes "1".
SD image signals (R, G, B) are output. For this reason,
The output of the display switching device 18 is an image signal (R,
G, B) becomes a composite image signal in a state where the OSD image signal (R, G, B) is overlaid, and the display switching device 1
When the data is sent to the display unit 23 via 8, the OSD is displayed on the television image.

Embodiment 2. In the above-described embodiment, the audio amplification unit 26 of FIG. 5 is the output line of the audio detection unit 16,
The example of switching and amplifying the audio signals of the output line of the FM tuner 24 and the output line of the audio / image reproducing unit 38 has been described, but the output line of the audio detecting unit 16, the output line of the FM tuner 24, and the audio / image reproducing The output lines of the unit 38 are combined into one output line (the input line of the audio amplification unit 26 is one).
Alternatively, the power may be supplied only to the device that is the target of amplification by the audio amplification unit 26. For example, when amplifying the output of the audio / image reproduction unit 38, power is supplied only to the audio / image reproduction unit 38, and the audio detection unit 16 and FM
No power is supplied to the tuner 24. By thus reducing the number of the output lines, the circuit can be simplified.

Embodiment 3. In the above-described embodiment, the example of the memory card is given as an example of the external storage device, but another storage device may be used. Further, the present invention can process not only the image data in the external storage device but also the image data transferred via the network in the same manner.

[0054]

As described above, according to the present invention, the first control of the image signal of the display image formed of the digital signal and the image signal of the OSD formed of the digital signal depending on the preset operation mode is performed. Since the signals are combined based on the signals and the combined image signal is converted into an analog signal and output to the display device side, the number of combining circuits in the analog circuit is reduced and the number of signal lines is also reduced. As a result, the circuit is simplified, the number of digital-analog converters is small, and the power consumption can be reduced.

[Brief description of drawings]

FIG. 1 is a block diagram showing a detailed configuration of a display control unit of a mobile device with a TV according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a display switching unit in FIG.

FIG. 3 is a timing chart showing a relationship among an image signal on a digital surface, an output signal of a DAC, a control signal, and an output signal of a display switching unit.

FIG. 4 is a timing chart showing a relationship among an image signal on a television screen, an OSD image signal, a control signal, and an output signal of a DAC.

FIG. 5 is a block diagram showing a configuration of a mobile device with a TV function according to the first embodiment of the present invention.

6 is an external view of the portable device with TV function of FIG.
(A) is an external view seen from the front side and (B) is seen from the back side.

7 is an external view of the portable device with TV function of FIG. 6 with a cover open.

FIG. 8 is an explanatory diagram of a menu screen of the display unit in FIG.

FIG. 9 is an explanatory diagram when a jog switch is moved to select an operation mode of the digital camera.

FIG. 10 is an explanatory diagram of a process when shifting from each mode to mode setting.

FIG. 11 is an explanatory diagram of an OSD display screen when a volume button is operated.

FIG. 12 is a circuit configuration diagram showing an outline of a portable device with a TV function, which is the background of the present invention.

[Explanation of symbols]

10 antennas 12 TV tuner 14 IF / Chroma processing section 15 Television processing circuit 16 Voice detector 18 Display switching device 20 LCD controller 22 Liquid crystal panel (LCD panel) 23 Display 24 FM tuner 26 Audio amplifier 28 Voice generator 30 Equipment control unit (CPU) 32 memory card IF 34 Operation part 36 Operation part IF 38 Audio / Image playback unit (DSP) 40 Display control unit 42 VRAM (frame memory) 44 RAM 46 ROM 50 CPU control unit 52 OSD memory 54 OSD display controller 56 screen display controller 58 Display switching section 60 Digital-to-Analog Converter (DAC) 62 Serial / parallel converter (S / P converter)

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masaaki Handa             Seiko, 3-3-3 Yamato, Suwa City, Nagano Prefecture             -In Epson Corporation F-term (reference) 5C023 AA18 CA02 CA05 CA08 DA03                       DA04 DA06 DA08 EA02                 5C025 AA28 BA27 BA28 BA30 CA09                       CB01 CB05 CB10 DA06 DA10                 5C066 AA03 BA20 CA01 DD08 ED04                       EE01 EE12 GA01 GA22 HA02                       KE09 KE20 KG05 KM13

Claims (14)

[Claims] 1. An image signal of a display image formed of a digital signal and an image signal of an on-screen display (hereinafter referred to as OSD) formed of a digital signal are converted into a first control signal depending on a preset operation mode. A portable device with a TV function, comprising: a display control device for synthesizing based on the above, converting the synthesized image signal into an analog signal and outputting the analog signal to a display device side. 2. The display control device, when the operation mode is set to a predetermined mode, generates a first control signal corresponding to the image signal of the OSD to generate an image signal of the display image. The portable device with TV function according to claim 1, wherein the image signal of the OSD is combined. 3. The display control device, a screen display control means for reading out the image data stored in the frame memory and outputting it as an image signal, an OSD storage means for storing the display data of the OSD, and the OSD. OSD display control means for reading the display data of the OSD from the storage means for output as an image signal, an output of the screen display control means and an output of the OSD display control means, and setting these inputs in advance. First synthesizing means for synthesizing based on the first control signal depending on the selected operation mode, and a digital-analog converter for converting the output of the display switching device into an analog signal and outputting the analog signal to the display device side. The portable device with a TV function according to claim 1 or 2, further comprising: 4. An operation unit for performing various operations, and an operation mode of at least displaying image data of an external storage device or displaying a television image is set by operation of the operation unit. 4. A portable device with a TV function according to claim 3, further comprising a calculation means for fetching and storing the operation mode thereof. 5. The OSD display control means comprises a pulse signal of a timing corresponding to a pixel of the OSD display data when the operation mode is set to a mode for displaying image data of an external storage device. The portable device with a TV function according to claim 3 or 4, wherein the first control signal is generated and output to the first synthesizing unit. 6. The TV function according to claim 3, further comprising image reproducing means for decompressing image data read from an external storage device and storing the image data in the frame memory. Mobile device. 7. The first synthesizing means inputs the image signals of the three primary colors from the screen display control means and the image signals of the three primary colors from the OSD display control section, respectively, and outputs the first primary color image data to the first primary color image data.
7. The T according to claim 3, comprising three selectors that are switched based on the control signal of
Mobile device with V function. 8. A register is built in, and the O is provided in the register.
8. The TV according to claim 3, further comprising a control unit that reads out the SD display data and stores the data in the OSD storage means when the SD display data is written.
Mobile device with functions. 9. The computing means, when a predetermined screen is displayed on the display device, generates the OSD display data corresponding to the screen and writes the OSD display data in the register. Mobile device with TV function. 10. The operating means, when a predetermined operation is performed by the operation unit, the OSD corresponding to the operation.
9. The portable device with a TV function according to claim 8, wherein the display data is generated and written in the register. 11. An image signal of a television image and an image signal from the display control device are input, and these image signals are combined based on a second control signal corresponding to the preset operation mode. The portable device with a TV function according to any one of claims 1 to 10, further comprising a second synthesizing means for outputting to the display device side. 12. The OSD display control means for outputting the image signal from the display control device as it is when the operation mode is set to a mode for displaying the image data of the external storage device. 12. The portable device with TV function according to claim 11, wherein the control signal is generated and output to the second synthesizing unit. 13. The OSD display control means, when the operation mode is set to a mode for displaying the television image, generates a first control signal for outputting the image signal of the OSD as it is. 13. The portable device with TV function according to claim 3, wherein the portable device is output to the first synthesizing unit. 14. The OSD display control means, when the operation mode is set to a mode for displaying the television image, the second OSD display control means is composed of a pulse signal at a timing corresponding to a pixel of the OSD image signal. 14. The portable device with TV function according to claim 13, wherein the control signal is generated and output to the second synthesizing unit.