JP2010103688A - Mobile terminal, and light emission control method therein - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile terminal capable of easily adjusting a luminescent color of an LED (light emitting diode) to obtain an intended color after LED light penetrates a housing of the mobile terminal, even if the color of the housing is changed. <P>SOLUTION: A multicolor luminescent means includes a light emission member of multiple colors, and is arranged inside of the housing of the mobile terminal. In addition, the mobile terminal includes a light emission control means, a signal output value setting means, and a correction information hold means. The light emission control means outputs a pulse width modulated signal to the multicolor luminescent means to control the multicolor luminescent means. In order to obtain a predetermined luminescent color, the signal output value setting means determines the output value of the pulse width modulated signal for each color light emission member, and sets it to the light emission control means. The correction information hold means holds correction information on a pulse width modulated signal according to a color of the housing wall. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a mobile terminal and a light emission control method thereof, and more particularly, to a light emission control technique that is preferably applied to, for example, a mobile phone that has abundant color variations and has LEDs mounted inside the housing.

  While mobile terminals such as mobile phones have become more sophisticated and smaller in size, design has also become a major focus on user orientation. In addition, as a means for informing the user of the state of such a mobile terminal, a method of informing with a color or lighting pattern of an LED (Light Emitting Diode) is widely used.

  However, the conventional portable terminal has been hindered in terms of design, such as making a hole in the housing at the portion where the multi-color LED shines when receiving a call or talking, and inserting white or transparent plastic. Moreover, when it was set as the structure which permeate | transmits the light of multi-color LED to a housing | casing, there existed a possibility of causing the user's misunderstanding because the color of LED which permeate | transmitted changed with the color of a housing | casing and it looked. That is, in the case of a structure in which an LED is shined through a housing, there is a problem that the transmitted color of the LED is limited depending on the housing color and cannot be shown to the user with an intended color.

For example, Patent Literature 1 discloses a portable terminal device including a new surface light emitting unit that can visually appeal to a user in various ways. The portable terminal device includes a surface light emitting unit disposed on an outer surface of the housing and a detachable panel member that is transparent or translucent and covers the surface light emitting unit. Thus, the panel member also emits light according to the design.
JP 2004-80390 A

  The portable terminal device disclosed in Patent Document 1 changes the light emission pattern of the surface light emitting unit in accordance with the changed panel member so that the LED light after passing through a non-colorless and transparent casing has the intended color. Can not be. That is, the light emission color is not adjusted so that the light from the LED has the intended color after passing through the housing.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a portable terminal that can easily adjust the emission color of an LED so that the intended color can be obtained after the LED light passes through the housing even if the color of the housing changes. .

  In order to achieve such an object, a first portable terminal of the present invention is a portable terminal in which a multicolor light emitting means having a plurality of color light emitting portions is arranged inside a housing, and is pulsed with respect to the multicolor light emitting means. A light emission control means for outputting a width modulation signal and controlling the multicolor light emission means, and a signal output value for obtaining the output value of the pulse width modulation signal for each color light emitting section to obtain a predetermined light emission color and setting it in the light emission control means Setting means, and correction information holding means for holding correction information of the pulse width modulation signal corresponding to the body color.

  The light emission control method of the first portable terminal of the present invention is a light emission control method of a portable terminal in which multicolor light emitting means having a plurality of color light emitting portions are arranged inside the housing, and the housing color information and each color light emission. Acquired by a correction coefficient acquisition step for acquiring a correction coefficient corresponding to the body color information of the mobile terminal and a correction coefficient acquisition step from a storage unit that holds correction information associated with a correction coefficient for the pulse width modulation signal of the unit The corrected output value obtained by the signal output value correcting step for correcting the output value of the pulse width modulation signal of each color light emitting unit and the signal output value correcting step using the correction coefficient thus obtained is applied to the multicolor light emitting means. A signal output value setting step that is set as an output value of a width modulation signal, and a light emission that outputs a pulse width modulation signal at the output value set by the signal output value setting step and controls the multicolor light emitting means And a control step,.

  According to the present invention, even if the housing color of the portable terminal changes, the emission color of the LED can be easily adjusted so that the intended color can be obtained after the LED light passes through the housing.

  First, an embodiment of the present invention will be described with reference to the drawings. The embodiments described below are preferred embodiments of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. Unless otherwise stated, the present invention is not limited to these embodiments.

  As an embodiment of the present invention, a mobile phone including multicolor LEDs as shown in FIG. 1 will be described. In the mobile phone according to the present embodiment, the following configuration makes it possible to easily adjust the emission color of the LED so that the same color is transmitted even if the housing color changes.

  As shown in FIG. 2, the mobile terminal device of this embodiment includes a multi-color LED 208 having LEDs of three colors, red (R), green (G), and blue (B), and a PWM (Pulse Width Modulation) signal. LED controller 207 for controlling multicolor LED 208 by output, CPU 201 for setting duty value of PWM signal to LED controller 207, built-in memory 202 in which a control program and data of the portable terminal are written, LCD 203, and key input circuit 204 A microphone 205 and a speaker 206.

  The built-in memory 202 stores various data handled by the mobile phone 101 such as a control program, a telephone directory, mail, a schedule, a memo, voice, an image, and a moving image. The built-in memory 202 corresponds to the correction information holding means of claim 1 and holds the case color information 501 and the correction multiplier table 502 as shown in FIG.

  The CPU 201 is a central processing unit for performing overall control. The CPU 201 corresponds to the signal output value setting means of claim 1 and calculates a correction duty value by multiplying each of the R, G, and B duty values obtained by calculation by a correction multiplier corresponding to the casing color. Then, the correction duty value is set in the LED controller 207.

  The LED controller 207 corresponds to the light emission control means of claim 1 and is a circuit that performs PWM signal control of the multi-color LED 208 based on the duty value of the PWM signal set by the CPU 201.

  The multicolor LED 208 is a light emitting element in which LEDs of three colors R, G, and B are packaged. The multi-color LED 208 corresponds to the multi-color light emitting means of claim 1, and lights up and blinks each color LED according to the PWM signal input from the LED controller 207.

  The key input circuit 204 includes a button switch group including a keyboard including a numeric keypad and function keys. Further, since the LCD 203, the microphone 205, and the speaker 206 are generally well known to those skilled in the art, description of the configuration is omitted.

  The light emission control of the multicolor LED in this embodiment will be described with reference to FIG.

  In FIG. 2, the R, G, and B of the multicolor LED 208 are controlled by the PWM signal output from the LED controller 207. The duty value of the PWM signal is calculated by the CPU 201 for each of R, G, and B and set in the LED controller 207. The duty value calculated here can be said to be an output value of a PWM signal for each color LED for obtaining a desired color (color before passing through the housing).

  The duty value of the PWM signal can be set in the range of 0 to 128. When the duty value is 128, the luminance of the LED is maximized. Further, each PWM signal output of R, G, B can be set to the LED controller from the CPU 201, so that ON / OFF control can be performed.

  For example, when the multi-color LED 208 blinks yellow by mixing R (red) and G (green), the R (red) and G (green) PWM signal output is ON and the B (blue) PWM signal output. As shown in FIG. 3, the CPU 201 can set the duty value to the LED controller 207 to cause the multicolor LED 208 to blink yellow.

  Next, color combinations in a color space called additive color mixture will be described with reference to FIG. If all the duty values of R, G, and B are set to 128 (100%), as shown in the figure, the mixed color of R (red), G (green), and B (blue) of the multicolor LED 208 Seven color combinations are possible.

  In additive color mixture, when all PWM signal outputs of R, G, and B of the multicolor LED 208 are turned ON, white color is generated. Next, for example, when the PWM signal output of R (red) and G (green) is turned ON, yellow color is developed, and when the PWM signal output of B (blue) and R (red) is turned ON, magenta color is developed. Thus, when the G (green) and B (blue) PWM signal outputs are turned ON, a cyan color is generated.

  Next, correction of the duty value of the PWM signal will be described with reference to FIG. As described above, in this embodiment, the case color information 501 and the correction multiplier table 502 shown in FIG. 5 are written in the built-in memory 202 in advance. First, as described above, the CPU 201 calculates the R, G, and B duty values according to the combination of colors.

  Next, the housing color information 501 and the corresponding correction multiplier are read from the correction multiplier table 502. For example, when the read casing color information 501 is 1, the correction multipliers R: 0.5, G: 1.0, and B: 1.0 are read from the correction multiplier table 502.

Next, the correction multiplier read out from the correction multiplier table 502 is applied to each of the R, G, and B duty values calculated above. For example, assuming that the calculated red, green, and blue duty values are 128, 128, and 0, respectively, the following calculation is performed.
128 (R duty value) x 0.5 (R correction multiplier) = 64
128 (G duty value) × 1.0 (G correction multiplier) = 128
0 (B duty value) x 1.0 (B correction multiplier) = 0

  The CPU 201 sets the above calculation result in the LED controller 207 as a final duty value. Thereby, it is possible to correct the R, G, and B duty values according to the housing color.

  Thus, as shown in FIG. 6, when the LED emission color 602 emitted from the multicolor LED 208 is transmitted through the housing 601 and is transmitted through the transparent color 603 outside the housing, for example, the housing color is pink. In this case, the transmitted color 603 has a strong reddish color, and even if the LED issuance color 602 is colored yellow due to a mixed color of R (red) and G (green), the transmitted color 603 becomes a color close to red. In that case, the transmitted color can be made yellow by adjusting the correction multiplier to reduce the red duty value.

  According to the above-described embodiment, the duty value obtained by the calculation of the CPU is multiplied by the correction coefficient corresponding to the body color to calculate the correction duty value, and the correction duty value is set in the LED controller to set the multicolor LED. Since the control is performed, the color can be easily adjusted without changing all the duty pattern controls calculated by the CPU.

  In addition, according to the above-described embodiment, since it is easy to adjust the emission color of the multicolor LED to obtain a desired transmission color, it is not necessary to make a hole in the housing for the portion where the multicolor LED shines. Since a structure can be adopted in which the LED light is transmitted through the housing to obtain a transmitted color outside the housing, a degree of freedom in design is given.

  The above-described embodiment is a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiment alone, and various modifications are made without departing from the gist of the present invention. Implementation is possible.

  That is, in the above embodiment, the method for adjusting the transmitted color when the three-color LEDs of red (R), green (G), and blue (B) are transmitted through the housing has been described. It may be used as a backlight. As a characteristic of the LCD module, it is possible to make the LCD display with the correct color by adjusting the color of the LCD backlight when redness is strong or bluish, and color reproducibility is easy. Can be increased.

It is the perspective view which showed the external appearance of the mobile telephone which concerns on embodiment of this invention. 1 is a block diagram showing a schematic configuration of a mobile phone according to an embodiment of the present invention. It is the chart which showed an example of the output state of the PWM signal in embodiment of this invention. It is a figure for demonstrating the combination of the color in the color space called additive color mixing. It is the figure which showed an example of the correction data used for LED light emission control in embodiment of this invention. It is a figure for demonstrating the LED light emission state of the mobile telephone which concerns on embodiment of this invention.

Explanation of symbols

101 mobile phone 201 CPU
202 Internal memory 203 LCD
204 Key input circuit 205 Microphone 206 Speaker 207 LED controller 208 Multicolor LED
501 Body color information 502 Correction multiplier table 601 Body 602 LED emission color 603 Transmission color

Claims (6)

A multi-color light emitting means having a plurality of color light emitting portions is a mobile terminal arranged inside a housing,
A light emission control means for outputting a pulse width modulation signal to the multicolor light emitting means and controlling the multicolor light emitting means;
A signal output value setting means for obtaining an output value of a pulse width modulation signal for each color light emitting section to obtain a predetermined emission color, and setting the light emission control means;
Correction information holding means for holding correction information of a pulse width modulation signal corresponding to the body color;
A portable terminal characterized by comprising:   2. The mobile phone according to claim 1, wherein the correction information holding unit holds, as the correction information, a correction correspondence table in which body color information and a correction coefficient for a pulse width modulation signal of each color light emitting unit are associated. Terminal.   The signal output value setting means acquires the correction coefficient corresponding to the body color information of the mobile terminal from the correction information holding means, and multiplies the obtained output value of the pulse width modulation signal of each color light emitting unit by the correction coefficient. The mobile terminal according to claim 2, wherein a corrected output value is calculated and the corrected output value is set in the light emission control means.   4. The portable terminal according to claim 3, wherein the light emission control means outputs a pulse width modulation signal to the multicolor light emission means with the corrected output value set by the signal output value setting means.   The portable terminal according to any one of claims 1 to 4, wherein the multicolor light emitting means is a light emitting element in which LEDs of three colors of red, green, and blue are packaged. A light emission control method for a mobile terminal in which a multicolor light emitting means including a plurality of color light emitting units is arranged inside a housing,
A correction coefficient acquisition step for acquiring the correction coefficient corresponding to the body color information of the mobile terminal from a storage unit that holds correction information in which the body color information and the correction coefficient for the pulse width modulation signal of each color light emitting unit are associated with each other; ,
Using the correction coefficient acquired in the correction coefficient acquisition step, a signal output value correction step for correcting the output value of the pulse width modulation signal of each color light emitting unit;
A signal output value setting step for setting the corrected output value obtained by the signal output value correcting step as an output value of a pulse width modulation signal to the multicolor light emitting means;
A light emission control step of outputting a pulse width modulation signal at the output value set in the signal output value setting step, and controlling the multicolor light emitting means;
A light emission control method for a mobile terminal, comprising:

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