JP2006148508A - Portable terminal device and color adjustment method of display unit thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable terminal device and a color adjustment method of a display unit of the device for shortening its manufacturing step and reducing its cost. <P>SOLUTION: The portable terminal device 1 includes a display unit 56 having a displaying face 12, and a camera unit 22 capable of facing to the displaying face 12. A white color display indicating unit 103 for displaying a white color on the display unit 56; a three primary color data acquiring unit 105 for acquiring three primary color data of an image on the displaying face 12 photographed by the camera unit 22, from the camera unit 22 through a camera control unit 50, under a condition in which a white color is displayed on the displaying unit 56; a memory 54 for storing a reference value 110 of the three primary color data; and a correction parameter calculating unit 107 for subtracting the three primary color data acquired by the three primary color data acquiring unit 105, from the reference value 110 of the three primary color data in the memory 54, calculating a correction parameter 112 for each color, and storing them in the memory 54 are provided. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a mobile terminal device, and more particularly to a color tone adjustment method for a display device of a mobile terminal device.

In recent years, with the advance of digital camera technology, camera-equipped mobile terminal devices have been widely spread. As a camera-equipped mobile terminal device, for example, there is one described in Patent Document 1. The portable information terminal with a digital camera described in the document has a structure in which both the liquid crystal surfaces of the camera unit and the display unit can be folded toward the inner surface of the portable terminal device. Thereby, it is possible to avoid adhesion, scratches or breakage of dust to the liquid crystal surfaces of the camera unit and the display unit.
JP 2000-270069 A

  In general, a mobile terminal device has a display device such as a liquid crystal display. However, since the color tone of the display device may deviate from the intended one, color tone adjustment is required in the manufacturing process. For example, even if white is displayed on the display device due to the shift in the color tone, the color is actually displayed in a yellowish or blueish color. Causes of color deviation include, for example, the color tone of the liquid crystal display of the display device is shifted, the transparency of the clear case provided on the front of the liquid crystal display is cloudy, or provided on the back of the liquid crystal display It is conceivable that the light color of the backlight is colored.

  At the time of manufacturing a conventional portable terminal device, the color adjustment of the display device is a special dedicated jig, for example, a camera provided facing the display surface of the display device of the portable terminal device, and an image taken at the time of camera shooting. Because it was done using a large light shielding enclosure that is not influenced by the surrounding situation, and based on the image taken with this camera, the color tone was automatically adjusted or visually adjusted, The adjustment process time was also required for a long time.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a mobile terminal device capable of shortening the manufacturing process and reducing the cost and a color tone adjusting method for the display device.

According to the present invention, there is provided a mobile terminal device including a display device having a display surface, and an imaging unit provided so as to be able to face the display surface,
A reference color display unit for displaying a reference color on the display surface of the display device;
A color data acquisition unit that acquires color data of an image of the display surface captured by the imaging unit from the imaging unit in a state where a reference color is displayed on the display device;
A reference value storage unit for storing reference color data;
A correction parameter calculation unit that calculates a correction parameter using the color data acquired by the color data acquisition unit and the reference color data of the reference value storage unit;
A correction value storage unit for storing the correction parameters;
There is provided a portable terminal device characterized by comprising:

  Here, the mobile terminal device includes, for example, a mobile phone, a PDA, a notebook computer, and the like. The reference color is, for example, white, and has a reference value of rgb (255, 255, 255) when expressed by 32-bit three primary color data, for example.

  According to this invention, it is possible to calculate a correction parameter for adjusting the color tone of the display device using an imaging unit built in the mobile terminal device, so that a jig dedicated to color tone adjustment is not necessary, Since adjustment can be automatically performed, the manufacturing process can be shortened and the cost can be reduced.

  In the portable terminal device, the color data acquired by the color data acquisition unit is three primary color data, the reference value storage unit includes the reference color data for each of the three primary colors, and the correction parameter calculation unit includes: The correction parameters for each color can be calculated using the three primary color data acquired by the color data acquisition unit and the reference color data for each of the three primary colors in the reference value storage unit.

  In the portable terminal device, the correction parameter calculation unit can calculate a correction parameter by dividing the reference color data in the reference value storage unit by the color data acquired by the color data acquisition unit.

  For example, when the color data acquisition unit acquires the three primary color data, the correction parameter calculation unit calculates the correction parameters for each color by dividing the reference color data for each of the three primary colors in the reference value storage unit by the three primary color data. To do.

  The portable terminal device may further include a display control unit that corrects the image using the correction parameter of the correction value storage unit and displays the image on the display device.

  According to this configuration, the display image can be corrected using the correction parameter calculated based on the display image of the display device of the mobile terminal device, and the color tone of the display device can be automatically adjusted.

In the portable terminal device, the display control unit includes a VRAM that develops an image to be displayed on the display device, and a correction unit that corrects the image developed on the VRAM using the correction parameter of the correction value storage unit. A display driver for displaying the image on the VRAM on the display surface;
Can be included.

  According to this configuration, even when the display driver does not support the specification of the correction parameter, the color tone of the display device can be adjusted.

  In the portable terminal device, the display control unit includes: a VRAM that develops an image to be displayed on the display device; and a display driver that displays the image on the VRAM on the display surface. An instruction unit for instructing the correction parameter of the correction value storage unit may be included, and the display driver may correct the image on the VRAM using the correction parameter and display it on the display surface.

  Here, the display driver can accept the specification of the correction parameter, and according to this configuration, it is possible to adjust the color tone of the display device simply by instructing the correction parameter.

  In the mobile terminal device, the lid part provided with the display surface, the main body part provided with the imaging unit, the display surface of the lid part, and the imaging unit of the main body part can face each other. And a foldable portable terminal device including a connecting portion that connects the main body portions.

  According to this configuration, it is possible to easily adjust the color tone of the display device using the built-in imaging unit in a state where the mobile terminal device is folded.

According to the present invention, there is provided a color tone adjustment method for a display device of a mobile terminal device, comprising: a display device having a display surface; and an imaging unit provided so as to face the display surface,
Displaying a reference color on the display surface of the display device;
Imaging the display surface on which the reference color is displayed in the displaying step;
Outputting color data of the image obtained in the imaging step;
Preparing a storage unit for storing reference color data and correction parameters;
Using the color data output in the outputting step and the reference color data in the storage unit to calculate a correction parameter;
Storing the correction parameter in the storage unit;
A color tone adjustment method for a display device of a mobile terminal device is provided.

According to the present invention, a display device having a display surface;
An imaging unit provided to face the display surface;
A storage unit that stores reference color data of an image when a reference color is displayed on the display surface;
A display control unit for displaying an image on the display surface;
A mobile terminal device equipped with
Means for displaying a reference color on the display surface of the display device;
Means for imaging the display surface;
Means for outputting color data of an image obtained by the means for imaging;
Means for dividing the reference color data of the storage unit by the color data and calculating a correction parameter for each color;
Means for storing the correction parameter in the storage unit;
Means for causing the display control unit to correct an image using the correction parameter of the storage unit;
There is provided a color tone adjustment program for the display device of the portable terminal device to function as a program.

According to the present invention, an execution unit that executes the color tone adjustment program;
An external connection terminal for connecting to an external terminal;
A receiving unit that receives a start command of the color tone adjustment program from the external terminal;
With
When the receiving unit receives the activation command, a portable terminal device is provided that causes the execution unit to execute the color tone adjustment program.

  According to the present invention, the program for adjusting the color tone is executed when a start command is received from the external device, so that it is not erroneously started due to an erroneous operation of the user during normal use, and at the time of manufacture. In the adjustment process, the program can be automatically executed simply by connecting to an external device and transmitting an activation command from the outside. Further, during maintenance, the program can be executed and the color tone can be automatically adjusted simply by connecting to an external device and transmitting an activation command from the outside, so that maintainability is improved.

  It should be noted that any combination of the above-described constituent elements and a conversion of the expression of the present invention between a method, an apparatus, a system, a recording medium, a computer program, etc. are also effective as an aspect of the present invention.

  According to the present invention, a mobile terminal device capable of shortening the manufacturing process and reducing the cost and a color tone adjusting method for the display device are provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same reference numerals are given to the same components, and the description will be omitted as appropriate.

  A mobile terminal device (mobile terminal device 1) according to an embodiment of the present invention includes a display device (display unit 56) having a display surface (display surface 12), and an imaging unit (camera) provided so as to face the display surface. Unit 22 and camera control unit 50), a reference color display unit (white display instruction unit 103) for displaying a reference color on the display device, and a reference color displayed on the display device In this state, a color data acquisition unit (three primary color data acquisition unit 105) that acquires color data of an image of the display surface captured by the imaging unit from the imaging unit, and a reference value storage unit that stores reference color data (reference value 110) A correction parameter calculation unit (correction parameter calculation unit 107) that calculates a correction parameter (correction parameter 112) using the (memory 54), the color data acquired by the color data acquisition unit, and the reference color data of the reference value storage unit. When, Comprising correction value storage unit for storing a positive parameters (memory 54), a.

(First embodiment)
FIG. 1 is an external view of a mobile terminal device according to the present embodiment. In the mobile terminal device 1, the lid portion 10 having the display surface 12 and the main body portion 20 having the key arrangement portion 24 are provided so as to be foldable by the hinge portion 30. Furthermore, the main body unit 20 includes a camera unit 22 provided so as to be able to face the display surface 12. In the present embodiment, the camera unit 22 is configured to be provided on the surface of the main body unit 20 on which the key arrangement unit 24 is disposed, but the present invention is not limited to this. For example, when the lid portion 10 is configured to be rotatable about the hinge portion 30 with respect to the main body portion 20, the camera portion 22 is provided on the back side of the surface of the main body portion 20 on which the key arrangement portion 24 is disposed. May be. The camera unit 22 includes a lens (not shown) and a CCD sensor (not shown).

  The mobile terminal device 1 further includes an external connection terminal unit 40, and can transmit and receive signals from an external device (not shown) via the external connection terminal unit 40. The external device is, for example, a personal computer or the like, has a serial port (not shown) such as RS-232C or USB, and is connected to the external connection terminal unit 40 by a dedicated cable (not shown). In the present embodiment, the mobile terminal device 1 will be described with respect to a mobile phone. However, the present invention is not limited to this, and includes, for example, a PDA or a notebook personal computer.

  FIG. 2 is a side view showing a state where the portable terminal device 1 of FIG. 1 is folded and the camera unit 22 faces the display surface 12. The camera unit 22 can take an image displayed on the display surface 12 in a state in which the lid unit 10 and the main body unit 20 of the mobile terminal device 1 are folded.

  FIG. 3 is a block diagram illustrating an example of a hardware configuration of the mobile terminal device 1. The mobile terminal device 1 includes a display unit 56 having a clear panel (not shown) and a liquid crystal display (not shown) provided on the display surface 12, a camera unit 22 provided so as to face the display surface 12, and a camera. A camera control unit 50 that controls the unit 22, a CPU 52 that controls the entire device together with each component of the mobile terminal device 1, a memory 54 that stores various programs and data for controlling the mobile terminal device 1, and the display surface 12 A backlight 58 provided on the back surface, a display controller 60 that controls display on the display unit 56, a VRAM 62 on which an image to be displayed on the display unit 56 is developed, and a display driver 64 that controls the display unit 56. Prepare.

  FIG. 4 is a functional block diagram illustrating functions of the CPU 52 of the mobile terminal device 1 of the present embodiment.

  Each component of the mobile terminal device 1 includes an arbitrary computer CPU, memory, a program that realizes the components shown in the figure loaded in the memory, a storage unit such as a hard disk that stores the program, and a network connection interface. It is realized by any combination of hardware and software. It will be understood by those skilled in the art that there are various modifications to the implementation method and apparatus. Each figure described below shows functional unit blocks, not hardware unit configurations. Moreover, in each figure, the structure of the part which is not related to the essence of the present invention is omitted.

  The CPU 52 includes a backlight control unit 101, a white display instruction unit 103, a three primary color data acquisition unit 105, a correction parameter calculation unit 107, and a correction parameter instruction unit 120. The memory 54 stores a reference value 110 and a correction parameter 112. Here, the reference value 110 is white primary color data serving as a reference and includes white primary color data of red, green, and blue. For example, when expressed as 32-bit three primary color data, rgb (255, 255) , 255).

  The backlight control unit 101 controls turning on / off of the backlight 58. The white display instruction unit 103 instructs the display unit 56 to display white. The three primary color data acquisition unit 105 turns on the backlight 58 and displays the white color on the display unit 56, the camera unit 22 captures the display surface 12, and the three primary color data of the obtained image is the camera unit 22. Are input to the CPU 52 via the camera control unit 50, and the three primary color data are acquired. The three primary color data are the three primary color data of red, green and blue.

  The correction parameter calculation unit 107 divides the reference value 110 stored in the memory 54 by each of the three primary color data acquired by the three primary color data acquisition unit 105, calculates a correction parameter for each color, and calculates the calculated correction parameter. 112 is stored in the memory 54. The correction parameter instruction unit 120 reads the correction parameter 112 from the memory 54, passes it to the display driver 64, and instructs correction.

  An operation at the time of color tone adjustment of the mobile terminal device 1 configured as described above will be described. First, the operation of the mobile terminal device 1 when calculating the color correction parameter will be described. FIG. 5 is a flowchart illustrating an example of the operation of the mobile terminal device 1 when calculating the correction parameter for color tone correction.

  First, the display surface 12 and the camera part 22 of the portable terminal device 1 are made to face each other (step S11). Here, the portable terminal device 1 is folded. Subsequently, the white display instruction unit 103 displays white on the display unit 56 (step S13). Subsequently, the backlight control unit 101 turns on the backlight 58 (step S15). And the camera part 22 image | photographs the image | video of the display surface 12 (step S17).

  Subsequently, the three primary color data acquisition unit 105 acquires the three primary color data from the camera unit 22 via the camera control unit 50 (step S19). The correction parameter calculation unit 107 divides the reference value 110 of each color in the memory 54 by the acquired data of each of the three primary color data, and calculates correction parameters 112 for each color of red, green, and blue (step S21). Then, the correction parameter 112 is stored in the memory 54 (step S23).

  In this way, the correction parameter 112 for each color is stored in the memory 54. For example, when the three primary color data acquired in step S19 is rbg (255, 254, 253), the correction parameter 112 for each color is (1, 1.0039, 1.0079).

  Next, an operation for displaying an image on the display unit 56 using the correction parameter 112 will be described. FIG. 6 is a flowchart showing an example of the operation at the time of color tone correction of the display unit 56 of the mobile terminal device 1.

  First, the display unit 56 develops an image on the VRAM 62 (step S31). Subsequently, the display controller 60 delivers the image developed in the VRAM 62 to the display driver 64 (step S33). Subsequently, the display driver 64 corrects and displays the image using the correction parameter 112 instructed from the correction parameter instruction unit 120. That is, the display data is corrected by multiplying the display primary color data by the correction parameter 112 for each color.

  The operations shown in FIGS. 5 and 6 are realized by a program, and the program is stored in the memory 54. The mobile terminal device 1 has a receiving unit (not shown) that receives a start command from a personal computer via the external connection terminal unit 40, and the program is started by receiving the start command. As described above, the program for adjusting the color tone is executed when the activation command is received via the external connection terminal unit 40. Therefore, the user operates the key of the key arrangement unit 24 during normal use. It will not be activated. Further, in the adjustment process at the time of manufacture, the program can be automatically executed simply by connecting to an external device and transmitting an activation command from the outside. Further, during maintenance, the color tone adjustment program can be automatically executed by transmitting a program start command from the personal computer via the external connection terminal unit 40, so that the maintainability is improved. .

  As described above, according to the mobile terminal device 1 of the present embodiment, the color tone of the display device of the mobile terminal device 1 can be automatically corrected in a short time without requiring a special jig, and the manufacturing process. And cost reduction.

(Second embodiment)
FIG. 7 is a functional block diagram showing a main configuration of the mobile terminal device 1 according to another embodiment of the present invention. The mobile terminal device 1 of FIG. 7 is different from the above embodiment in that the display driver 64 does not have a color tone correction function based on the correction parameter 112.

  The mobile terminal device 1 includes a correction unit 130 and an image writing unit 132. The correction unit 130 reads the correction parameter 112 from the memory 54, multiplies the image data developed in the VRAM 62 by the correction parameter 112, and passes the image data to the image writing unit 132. The image writing unit 132 develops the image data corrected by the correction unit 130 in the VRAM 62.

  An operation at the time of color tone adjustment of the display device of the mobile terminal device 1 configured as described above will be described. FIG. 8 is a flowchart illustrating an example of the operation of the mobile terminal device 1 of the present embodiment. Here, description will be made with reference to FIGS. 3, 7, and 8. First, the correction unit 130 corrects the image developed in the VRAM 62 using the correction parameter 112 read from the memory 54 (step S41). Specifically, the correction parameter 112 is multiplied by the image data, and the image writing unit 132 writes the corrected image data in the VRAM 62.

  Subsequently, the display controller 60 of FIG. 3 delivers the image of the VRAM 62 to the display driver 64 (step S43). Then, the display driver 64 displays an image on the display unit 56 (step S45).

  As described above, according to the mobile terminal device 1 of the present embodiment, color correction can be performed even when the display driver 64 does not support the correction parameter 112 for color correction.

  As mentioned above, although embodiment of this invention was described with reference to drawings, these are the illustrations of this invention, Various structures other than the above are also employable.

  For example, in the above embodiment, a configuration using a liquid crystal display and a backlight as the display unit 56 has been described, but the present invention is not limited to this. For example, as the display unit 56, other devices such as an organic EL display can be used. Moreover, although the structure using a CCD sensor was demonstrated as the camera part 22, it is not limited to this, For example, a CMOS camera may be sufficient. The camera unit 22 can be a camera that supports CIF (Common Intermediate Format).

  In the above embodiment, a configuration has been described in which a program startup command is received via the external connection terminal unit 40 and a program for color tone adjustment is started. However, the present invention is not limited to this. For example, a command receiving unit that receives each command for instructing execution of each step of the program may be provided, and each step may be executed according to the command received by the command receiving unit.

It is an external view of the portable terminal device which concerns on embodiment of this invention. It is a side view at the time of folding of the portable terminal device of FIG. It is a block diagram which shows an example of the hardware constitutions of the portable terminal device of FIG. It is a functional block diagram which shows the function of CPU of the portable terminal device of FIG. 6 is a flowchart showing an example of an operation when calculating a correction parameter for color correction of the mobile terminal device of FIG. 5 is a flowchart illustrating an example of an operation at the time of color tone correction of the display unit of the mobile terminal device of FIG. 4. It is a functional block diagram which shows the principal part structure of the portable terminal device which concerns on other embodiment. It is a flowchart which shows an example of the operation | movement at the time of the color correction of the display part of the portable terminal device of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Portable terminal device 10 Cover part 12 Display surface 20 Main body part 22 Camera part 24 Key arrangement part 30 Hinge part 40 External connection terminal part 50 Camera control part 52 CPU
54 Memory 56 Display 58 Backlight 60 Display Controller 62 VRAM
64 Display driver 101 Backlight control unit 103 White display instruction unit 105 Three primary color data acquisition unit 107 Correction parameter calculation unit 110 Reference value 112 Correction parameter 120 Correction parameter instruction unit 130 Correction unit 132 Image writing unit

Claims (15)

A mobile terminal device comprising: a display device having a display surface; and an imaging unit provided so as to be able to face the display surface,
A reference color display unit for displaying a reference color on the display surface of the display device;
A color data acquisition unit that acquires color data of an image of the display surface captured by the imaging unit from the imaging unit in a state where a reference color is displayed on the display device;
A reference value storage unit for storing reference color data;
A correction parameter calculation unit that calculates a correction parameter using the color data acquired by the color data acquisition unit and the reference color data of the reference value storage unit;
A correction value storage unit for storing the correction parameters;
A portable terminal device comprising: The mobile terminal device according to claim 1,
The color data acquired by the color data acquisition unit is three primary color data,
The reference value storage unit has the reference color data for every three primary colors,
The correction parameter calculation unit calculates a correction parameter for each color using the three primary color data acquired by the color data acquisition unit and the reference color data for each of the three primary colors in the reference value storage unit. A portable terminal device. The mobile terminal device according to claim 1 or 2,
The mobile terminal device, wherein the correction parameter calculation unit divides the reference color data in the reference value storage unit by the color data acquired by the color data acquisition unit to calculate a correction parameter. The portable terminal device according to any one of claims 1 to 3,
A portable terminal device comprising: a display control unit configured to correct the image using the correction parameter of the correction value storage unit and display the image on the display device. The mobile terminal device according to claim 4,
The display control unit
A VRAM for developing an image to be displayed on the display device;
A correction unit that corrects an image developed in the VRAM using the correction parameter of the correction value storage unit;
A display driver for displaying the image on the VRAM on the display surface;
A portable terminal device comprising: The mobile terminal device according to claim 4,
The display control unit
A VRAM for developing an image to be displayed on the display device;
A display driver for displaying the image on the VRAM on the display surface;
An instruction unit that instructs the correction parameter of the correction value storage unit to the display driver;
The mobile terminal device, wherein the display driver corrects the image on the VRAM using the correction parameter and displays the image on the display surface. The mobile terminal device according to any one of claims 1 to 6,
A lid provided with the display surface;
A main body provided with the imaging unit;
A connecting portion that connects the lid portion and the main body portion so that the display surface of the lid portion and the imaging portion of the main body portion can face each other;
A portable terminal device comprising a foldable portable terminal device. A color tone adjustment method for a display device of a mobile terminal device comprising: a display device having a display surface; and an imaging unit provided so as to be able to face the display surface,
Displaying a reference color on the display surface of the display device;
Imaging the display surface on which the reference color is displayed in the displaying step;
Outputting color data of the image obtained in the imaging step;
Preparing a storage unit for storing reference color data and correction parameters;
Using the color data output in the outputting step and the reference color data in the storage unit to calculate a correction parameter;
Storing the correction parameter in the storage unit;
A color tone adjustment method for a display device of a mobile terminal device. The color tone adjusting method according to claim 8,
The color data output in the step of outputting the color data is three primary color data,
Storing the reference color data for each of the three primary colors in the storage unit;
The step of calculating the correction parameter includes:
A portable terminal comprising: calculating correction parameters for each color using the three primary color data output in the step of outputting the color data and the reference color data for each of the three primary colors in the storage unit Method for adjusting color tone of display device of apparatus. The color tone adjustment method according to claim 8 or 9,
The step of calculating the correction parameter includes:
A color tone adjustment method for a display device of a portable terminal device, comprising the step of dividing the reference color data by the color data output in the step of outputting the color data. The color tone adjustment method according to any one of claims 8 to 10,
Correcting the image using the correction parameter of the storage unit;
Displaying the image corrected in the correcting step on the display device;
A color tone adjustment method for a display device of a mobile terminal device. The color tone adjustment method according to claim 11,
The portable terminal device includes a VRAM and a display driver for developing an image to be displayed on the display device,
Developing the image corrected in the correcting step in the VRAM;
The display driver displaying the image of the VRAM on the display surface;
A color tone adjustment method for a display device of a mobile terminal device. The color tone adjustment method according to claim 11,
The portable terminal device includes a VRAM and a display driver for developing an image to be displayed on the display device,
Instructing the display driver the correction parameter of the storage unit;
Expanding the image into the VRAM;
Correcting the image developed in the step of developing in the VRAM using the correction parameter instructed by the display driver in the instructing step;
Displaying the image corrected in the correcting step by the display driver on the display surface;
A color tone adjustment method for a display device of a mobile terminal device. A display device having a display surface;
An imaging unit provided to face the display surface;
A storage unit that stores reference color data of an image when a reference color is displayed on the display surface;
A display control unit for displaying an image on the display surface;
A mobile terminal device equipped with
Means for displaying a reference color on the display surface of the display device;
Means for imaging the display surface;
Means for outputting color data of an image obtained by the means for imaging;
Means for dividing the reference color data of the storage unit by the color data and calculating a correction parameter for each color;
Means for storing the correction parameter in the storage unit;
Means for causing the display control unit to correct an image using the correction parameter of the storage unit;
A color tone adjustment program for the display device of the mobile terminal device for functioning as: An execution unit that executes the color tone adjustment program according to claim 14;
An external connection terminal for connecting to an external terminal;
A receiving unit that receives a start command of the color tone adjustment program from the external terminal;
With
A portable terminal device that causes the execution unit to execute the color tone adjustment program when the reception unit receives the activation command.

Images