JP3838980B2 - Mobile phone device, image control method used therefor, and program thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mobile phone device, an image control method used therefor, and a program thereof, and more particularly to a method for controlling image display on a display unit such as an LCD (Liquid Crystal Display).
[0002]
[Prior art]
Conventionally, LCD controllers are used for controlling LCD image display (see, for example, Patent Document 1). Such LCD image control is generally controlled independently of the communication time slot.
[0003]
In recent years, mobile phone devices have been requested to display moving images (such as videophone using a camera) during a call, or to display animation during a call, along with the mounting of an image sensor [eg, CCD (Charge Coupled Device)]. These functions tend to be requested as standard functions.
[0004]
A configuration example of the above mobile phone device is shown in FIG. In FIG. 7, the mobile phone 3 includes an antenna 31, a radio unit 32, a control unit 33, a main memory unit 34, a key input unit 35, an LCD controller unit 36 including an output unit 361, and an LCD display unit 37. And a data bus 301 and an image data bus 302.
[0005]
This mobile phone 3 uses a time division multiple access (TDMA) [Personal Digital Cellular (PDC) method], and the operation timing when the screen is rewritten at 15 frames / sec in the above configuration is shown in FIG. .
[0006]
[Patent Document 1]
JP-A-2002-123273 (8th to 11th pages, FIG. 1)
[0007]
[Problems to be solved by the invention]
In the above-described conventional mobile phone device, in order to meet the above-described demand, consideration must be given to avoid the problem of reception interference generated from the LCD data bus. Generally, EMI (Electro- Addition of a countermeasure against magnetic interference (electromagnetic noise), addition of a shield, addition of an electromagnetic absorption sheet, and the like are performed.
[0008]
Conventional mobile phone devices are required to have high-density mounting and cost reduction, and the number of these additional parts increases as the number of data bus lines increases.
[0009]
Further, in the conventional mobile phone device, the LCD controller is not synchronized with the communication time slot, so that the image data is transmitted regardless of the communication time slot. Therefore, in the conventional cellular phone device, as shown in FIG. 8, there is a problem that the reception slot and the image transmission overlap each other, and reception is disturbed.
[0010]
Accordingly, an object of the present invention is to solve the above-mentioned problems, to fundamentally avoid the problem of reception interference, and to reduce the number of parts, reduce the cost, and achieve high-density mounting, and to it An object is to provide an image control method to be used and a program therefor.
[0011]
[Means for Solving the Problems]
A mobile phone device according to the present invention is a mobile phone device that includes a display controller that sends image data held in a memory to a display unit via a data bus, and performs wireless communication using a TDMA (Time Division Multiple Access) method. And
The display controller includes control means for controlling to send the image data from the memory to the display unit via the data bus using a timing signal of an idle slot during wireless communication by the TDMA system .
[0012]
An image control method according to the present invention includes a display controller that transmits image data held in a memory to a display unit via a data bus, and is used for a mobile phone device that performs wireless communication using a TDMA (Time Division Multiple Access) method. In the image control method, the display controller controls to transmit the image data from the memory to the display unit via the data bus using a timing signal of an idle slot during wireless communication by the TDMA method. Control processing is being executed .
[0013]
A program for an image control method according to the present invention includes a display controller that sends image data held in a memory to a display unit via a data bus, and performs mobile communication using a TDI (Time Division Multiple Access) system. A program of an image control method used for transmitting the image data from the memory to the display unit via the data bus using a timing signal of an idle slot during wireless communication by the TDMA method. The process to control is executed.
[0014]
That is, the mobile phone device of the present invention increases the transmission speed of LCD data to the problem of reception interference during communication generated from the LCD data bus between the LCD (Liquid Crystal Display) controller and the LCD display unit, (Idle) Transmission in idle time of the slot avoids the problem of reception interference.
[0015]
More specifically, in the mobile phone device of the present invention, the LCD controller unit is provided with a memory for temporarily holding image data, the image data is temporarily held in this memory, and the image data held in the memory is permitted. It is sent to the LCD display unit at the timing.
[0016]
The transmission timing in this case is controlled by the timing control circuit so as to be performed in the idle time in the idle slot. Therefore, the cellular phone device of the present invention can avoid a reception data error that occurs during image display (image rewriting) during communication, and can solve the problem of reception interference.
[0017]
In the mobile phone device of the present invention, by using the above configuration, image data transmission can be controlled at a timing that does not affect reception without using an EMI (Electro-Magnetic Interference) countermeasure component. Thus, it is possible to solve the above-described reception interference problem.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration example of a mobile phone according to an embodiment of the present invention. In FIG. 1, a mobile phone 1 includes an antenna 11, a radio unit 12, a control unit 13, a main memory unit 14, a key input unit 15, an LCD controller unit 16, an LCD display unit 17, and the above-described units. The recording medium 18 stores a program to be executed (a computer-executable program), a data bus 101, and an image data bus 102.
[0019]
The LCD controller unit 16 includes a timing control unit 161, a memory 162 that temporarily holds image data, and an output unit 163. A signal (image data) from the LCD controller unit 16 is transmitted to the LCD display unit 17 via the data bus 101 and displayed on the LCD display unit 17.
[0020]
When image data is input via the antenna 11 and the wireless unit 12, the control unit 13 sends the image data to the LCD controller unit 16 via the image data bus 102.
[0021]
The timing control unit 161 of the LCD controller unit 16 temporarily holds the image data from the control unit 13 in the memory 162. The timing control unit 161 reads the image data held in the memory 162, determines the transmission timing based on the timing signal output from the control unit 13 to the wireless unit 12, and uses the data bus 101 at the permitted timing. It is sent to the LCD display unit 17.
[0022]
Note that the mobile phone 1 uses a Time Division Multiple Access (TDMA) [Personal Digital Cellular (PDC) system].
[0023]
FIG. 2 is a diagram showing image data transmission timing according to an embodiment of the present invention, and FIG. 3 is an enlarged view of an idle slot portion of FIG. The transmission timing of image data according to an embodiment of the present invention will be described with reference to FIGS.
[0024]
The image data transmitted to the LCD display unit 17 is controlled to be transmitted by a timing control unit 161 in the LCD controller unit 16. The output timing by the timing control unit 161 is controlled using an idle slot timing signal obtained from the control unit 13, and as shown in FIG. 3, the timing does not overlap with the electric field level detection operation of the peripheral channel performed in the idle slot. Done in In this case, the transmission speed of the image data is set to 12 MHz or higher in order to complete the transmission at a predetermined timing in the idle slot.
[0025]
FIG. 4 is a flowchart showing the operation of the mobile phone 1 according to one embodiment of the present invention. With reference to FIG. 1 and FIG. 4, the operation of displaying a moving image during a call of the mobile phone 1 according to an embodiment of the present invention will be described. Note that the processing shown in FIG. 4 is realized when each unit of the mobile phone 1 executes the program of the recording medium 18. The displayed moving image is stored in the main memory unit 14.
[0026]
In the mobile phone 1 during a call (step S1 in FIG. 4), as shown in FIG. 2, a fixed time slot, that is, each slot of “transmission (TX)”, “reception (RX)”, and “idle”. Communication is performed in order.
[0027]
During this call, the control unit 13 reads the image data stored in the main memory unit 14 (step S2 in FIG. 4), and sends the image data to the LCD controller unit 16 to the memory unit 162 in the LCD controller unit 16. Store (step S3 in FIG. 4).
[0028]
In the LCD controller section 16, the timing control section 161 uses the idle slot timing signal obtained from the control section 13 to determine whether or not the data transmission is permitted (step S4 in FIG. 4). If it is the permitted timing, the timing control unit 161 sends the image data temporarily stored in the memory 162 to the LCD display unit 17 via the output unit 163 and the data bus 101 (step S5 in FIG. 4).
[0029]
As described above, in this embodiment, by transmitting image data to the LCD display unit 17 at idle slot idle timing that is not directly related to communication, it is possible to fundamentally avoid the problem of reception interference. Since the EMI countermeasure element added to the conventional LCD data bus is not necessary, it is possible to reduce the number of parts, reduce the cost, and achieve high-density mounting.
[0030]
FIG. 5 is a diagram showing the transmission timing of image data according to another embodiment of the present invention. A cellular phone according to another embodiment of the present invention has the same configuration as that of the cellular phone 1 according to the embodiment of the present invention shown in FIG. 1, but the timing control for sending image data is further devised.
[0031]
In the TDMA (PDC system) communication system, idle slots in communication exist at a cycle of 20 msec. Therefore, as shown in FIG. 5, by sending out one frame of image data every idle slot time, as shown in FIG. The screen can be rewritten at a rate of 50 frames / sec. As a result, in this embodiment, even when a higher speed drawing is requested, it is possible to sufficiently cope.
[0032]
FIG. 6 is a block diagram showing a configuration example of a mobile phone according to another embodiment of the present invention. In FIG. 6, the mobile phone 2 according to another embodiment of the present invention is one of the present invention shown in FIG. 1 except that it is applied to a GSM (Global System for Mobile communication) system using a SIM card (Subscriber Identity Module) 21. The configuration is the same as that of the mobile phone 1 according to the embodiment, and the same components are denoted by the same reference numerals. The operation of the same component, that is, the operation including the image display control as described above is the same as that of the embodiment of the present invention.
[0033]
In the present invention, the image display control on the LCD display unit 17 has been described. However, the present invention can be applied to the case where a display unit such as an organic EL display (Organic Electroluminescence Display) is used, and the present invention is not limited to this. Further, the present invention can be applied to any communication method as long as the TDMA method is used.
[0034]
【The invention's effect】
As described above, in the mobile phone device including the display controller used for image display control on the display unit, the display controller controls the transmission timing of the image data to the display unit according to the timing signal from the outside. By doing so, the problem of reception interference can be fundamentally avoided, and the effect of reducing parts, reducing costs, and achieving high-density mounting can be obtained.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration example of a mobile phone according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating transmission timing of image data according to an embodiment of the present invention.
FIG. 3 is an enlarged view of an idle slot portion of FIG. 2;
FIG. 4 is a flowchart showing an operation of the mobile phone 1 according to the embodiment of the present invention.
FIG. 5 is a diagram illustrating image data transmission timing according to another embodiment of the present invention.
FIG. 6 is a block diagram showing a configuration example of a mobile phone according to another embodiment of the present invention.
FIG. 7 is a block diagram showing a configuration example of a mobile phone according to a conventional example.
FIG. 8 is a diagram illustrating transmission timing of image data according to a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1, 2 Mobile phone 11 Antenna 12 Radio | wireless part 13 Control part 14 Main memory part 15 Key input part 16 LCD controller part 17 LCD display part 18 Recording medium 21 SIM card 101 Data bus 102 Image data bus

Claims (12)

A mobile phone device that includes a display controller that sends image data held in a memory to a display unit via a data bus, and performs wireless communication using a TDMA (Time Division Multiple Access) method ,
The display controller has control means for controlling to transmit the image data from the memory to the display unit via the data bus using a timing signal of an idle slot during wireless communication by the TDMA method. Mobile phone device.   2. The cellular phone device according to claim 1, wherein the control means synchronizes with a timing signal of a time slot during communication to control a transmission timing of the image data. Wherein, the mobile telephone device according to claim 2, wherein said performing the transmission of image data to the free time of the idle slots not directly related to the communication quality in controlling the transmission timing of the image data. 4. The mobile phone device according to claim 3 , wherein the display controller temporarily holds the image data in the memory when the transmission timing of the image data is controlled . 5. The mobile phone device according to claim 3 , wherein the display controller displays one frame in an idle slot in one slot. 6. The mobile phone device according to claim 5 , wherein the display controller displays a moving image of a maximum of 50 frames / sec by displaying one frame in an idle slot in one slot. An image control method for use in a mobile phone device that includes a display controller that sends image data held in a memory to a display unit via a data bus, and performs wireless communication using a TDMA (Time Division Multiple Access) method , The display controller executes a control process for controlling to send the image data from the memory to the display unit via the data bus using a timing signal of an idle slot during wireless communication by the TDMA method. An image control method. 8. The image control method according to claim 7 , wherein in the control processing, synchronization is performed with a timing signal of a time slot in communication, and the transmission timing of the image data is controlled. 9. The image control method according to claim 8 , wherein , in the control process, when the transmission timing of the image data is controlled, the transmission of the image data is performed in an idle slot empty time not directly related to communication quality. The image control method according to claim 9 , wherein the display controller displays one frame in an idle slot of one slot. The image control method according to claim 10 , wherein the display controller displays a moving image of a maximum of 50 frames / sec by displaying one frame in an idle slot in one slot. A program for an image control method used in a mobile phone device including a display controller for sending image data held in a memory to a display unit via a data bus and performing wireless communication using a TDMA (Time Division Multiple Access) method Causing a computer to execute a process of controlling to transmit the image data from the memory to the display unit via the data bus using a timing signal of the TDMA system idle slot during wireless communication using the TDMA system . Program for.

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