JP2008151921A - Portable information terminal and program for portable information terminal - Google Patents

Abstract

In a self-luminous display device such as an organic ELD, an image portion is included in a technique for reducing power consumption by displaying only character data in white or high luminance and displaying the other in black or reducing luminance. When the luminance is lowered, the display boundary becomes difficult to see, and when only the image portion is displayed in the original color, a large amount of power is used for display in the case of a white basic image.
In a portable information terminal, a contour portion of an image of image data is extracted, the extracted contour portion is converted into contour image data of a predetermined image level, and the entire image of the generated image data is determined at a predetermined ratio. There is provided means for displaying image data obtained by superimposing contour image data subjected to light color conversion on background image data of a predetermined ratio obtained by conversion to background image data of the image level and dark color conversion.
[Selection] Figure 1

Description

  The present invention relates to a portable information terminal equipped with a self-luminous display unit such as an organic EL (Electro luminescence) or LED (Light Emitting Diode), and in particular, uses a dark color for display. It relates to control that increases the ratio and suppresses power.

  As a portable information terminal driven by a battery, it is required to make the usage time of the battery as long as possible. In recent years, self-luminous display devices typified by organic EL displays have been commercialized, and some have been made for portable information terminal applications.

  The organic EL display has the largest power when the entire display surface is displayed in white, and is simply calculated, and the power is about 1/3 in the case of a single color of red (R), green (G) or blue (B). The black color is characterized by the smallest electric power. Therefore, in the case of dedicated application software created on the assumption that an organic EL display is used, it is possible to create application software to display the screen with a dark color scheme that matches the characteristics of the organic EL display described above. It is.

  However, in the case of commercially available application software such as character creation and table creation, the screen background (base) uses a screen of black characters in a bright color such as white, so a self-luminous type like an organic EL display However, this display device consumes a large amount of power.

With respect to such a problem of power consumption, in the prior art disclosed in Patent Document 1, a technique is disclosed in which a black character and a white background are inverted, the character display is white, and the other background display is black.

In the prior art disclosed in Patent Document 2, a technique for increasing the brightness of only character display and reducing the brightness of other background display is disclosed.
JP 2003-108076 A Japanese Patent Laid-Open No. 2002-199078

  In a portable information terminal equipped with a self-luminous display device such as an organic EL display, it is necessary to reduce the power used for display in order to lengthen the battery drivable time.

  By the way, some applications used in the portable information terminal display not only characters and tables but also images such as pictures. For this reason, in order to reduce power consumption, it is necessary to darken not only characters and backgrounds but also images such as pictures.

  However, in the conventional techniques described in Patent Documents 1 and 2, image display such as a picture is not considered for changing the brightness of the brightness. For this reason, when the luminance level of an image such as a picture is high, there is a problem that power consumption for display increases.

  An object of the present invention is to extract a contour portion of an image in a portable information terminal equipped with a self-luminous display device, and display a contour portion bright and a background portion dark, so that an image such as a picture has a bright contour portion. It is an object of the present invention to provide a portable information terminal capable of reducing power consumption for display by displaying with a dark flat portion.

  In order to solve the above problems, a first embodiment of the present invention includes a self-luminous display unit and an image generation unit that generates image data for displaying an image such as a character or a picture on the display unit. In the portable information terminal, a contour extracting unit that extracts a contour of an image of the image data generated by the image generating unit, and a contour extracted from the image by the contour extracting unit is used as contour image data at a predetermined image level. A light color conversion unit for conversion, and a dark color conversion unit for converting the entire image of the image data generated by the image generation unit into background image data at a predetermined ratio of the image level, and a predetermined color converted by the dark color conversion unit Means is provided for displaying image data obtained by superimposing the contour image data converted by the bright color conversion unit on the background image data at the ratio of the image level.

  Further, the contour extraction unit extracts a contour part for each color component, and the bright color conversion unit converts the color component extracted by the contour extraction unit into contour image data having a predetermined image level. And

  Further, the light color conversion unit is provided with means for designating the predetermined image level.

  Further, a means for designating the thickness of the contour portion in the light color conversion portion is provided.

  A second aspect of the present invention is for a portable information terminal comprising a self-luminous display unit and an image generation unit for generating image data for displaying an image such as a character or a picture on the display unit. A contour extraction unit that extracts a contour portion of an image of image data generated by the image generation unit, and converts the contour portion extracted from the image by the contour extraction unit into contour image data of a predetermined image level. A light color conversion unit, and a dark color conversion unit that converts the entire image of the image data generated by the image generation unit into background image data of a predetermined ratio of the image level, and a predetermined ratio converted by the dark color conversion unit A program for a portable information terminal that realizes displaying image data obtained by superimposing contour image data converted by the bright color conversion unit on background image data at an image level.

  According to the present invention, in a portable information terminal equipped with a self-luminous display device, a contour portion of an image is extracted, and the contour portion is brightly displayed and the background portion is darkly displayed. By displaying with a dark flat portion, power consumption for display can be reduced.

  In addition, by converting to contour image data having a predetermined image level for each color component, the contour portion can be extracted and displayed even in the case of an image in which the luminance does not change but the color changes.

  In addition, since the brightness of the contour portion can be changed by designating a predetermined image level in the light color conversion portion, it is possible to make the display easy to see according to the design.

  In addition, by specifying the thickness of the contour in the bright color conversion unit, the thickness of the line in the contour can be changed, so in a picture with many contours, the thickness of the line can be reduced for easy viewing. It becomes possible.

  Moreover, a program for reducing power consumption for display can be provided by displaying an image such as a picture with a bright outline portion and a dark flat portion by a program for a portable information terminal.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram illustrating a configuration of a portable information terminal according to the present invention. In FIG. 1, a portable information terminal 100 includes a CPU (Central Processing Unit) 108, a power supply unit 106, a battery unit 111, a ROM 110, a RAM 109, an execution input unit 104, an end input unit 105, a display. Unit / input unit (organic EL / touch panel) 101, display switching input unit 107, contour extraction unit 102, light color conversion unit 103, and dark color conversion unit 112.

  The CPU 108 is a device that plays a central role in operating the portable information terminal 100, and performs processing such as computation for creating an image and computation for executing a program. The power supply unit 106 is a portion configured by an analog circuit that converts and supplies power supplied from a battery unit 111 (to be described later) to a voltage usable for each device or module in the terminal.

  ROM 110 is an abbreviation for Read Only Memory, a basic operation program (operating system) for starting up the portable information terminal 100, a driver program that links the basic operation program and hardware, and an application program that operates on the basic operation program. Etc. are stored.

  The RAM 109 is an abbreviation for Random Access Memory, and is a device that temporarily stores programs, data created by a user, and the like, and is displayed on a display unit of a display unit / input unit (organic EL / touch panel) 101 described later. Temporarily save the image data of the image to be processed and the power saving display image data converted by the X direction color change point extraction / light color conversion unit / dark color conversion unit 102 and the Y direction color change point extraction / light color conversion unit 103 described later. It is also an area to memorize.

  The end input unit 105 is an apparatus that generates an electrical signal (trigger) for inputting an instruction for determining the end of the program being executed and returning to the previous operation. It is called input means. The execution input unit 104 is an apparatus that generates an electrical signal (trigger) that recognizes the confirmation of the start of a program and the like, and is generally an input means called an enter key.

  The display unit of the display unit / input unit (organic EL / touch panel) 101 is a device for recognizing images such as characters, still images, and moving images with human eyes, and is a self-luminous type typified by an organic EL display device. It is a display device. The input unit of the display unit / input unit (organic EL / touch panel) 101 is an apparatus that is placed on the above-described display unit and inputs information (data) by linking with image information displayed on the display unit. . When the screen is touched with a dedicated stylus pen or the like, it is recognized as an input signal (data), and the designated program can be executed or the input data can be confirmed. This is an apparatus that generates an electrical signal that can realize the same functions and processing as the end input unit 105 and the execution input unit 104 described above.

  The battery unit 111 is a device that stores and supplies power for operating the portable information terminal 100. The display switching input unit 107 displays a standard display mode in which image data of the original image temporarily stored in the RAM 109 is displayed, and power saving converted by the contour extraction unit 102, the light color conversion unit 103, and the dark color conversion unit 112 described later. This is a switch for selecting a power saving display mode for displaying display image data. When it is realized in hardware, it is realized by a slide switch or a push switch. It can also be realized by a combination of the input unit of the display unit / input unit (organic EL / touch panel) 101 and software.

  Here, the operation in the power saving display mode according to the present invention will be described. When the user operates the display switching input unit 107 to select the power saving display, the display unit / input unit (organic EL / touch panel) 101 created by the CPU 108 which is an image generation unit and temporarily stored in the RAM 109 is used. The image data of the original image to be displayed on the display unit is read out, the contour extraction unit 102 extracts the horizontal and / or vertical contours of the screen, and the bright color conversion unit 103 sets the image level of the contour in advance. The image data is converted into contour image data having a bright image level. On the other hand, the image data of the original image read from the RAM 109 is converted into background image data having a dark image level with a preset ratio, and the contour image data and the background image data are overlapped by the mixing unit 113 to display power saving. The image data is temporarily stored in the RAM 109 via the CPU 108.

  Thereafter, the power saving display image data temporarily stored in the RAM 109 is read and displayed on the display unit of the display unit / input unit (organic EL / touch panel) 101. The contour portion, which is a part of the entire image, is brightly displayed, and the background (flat portion), which is the majority of the entire image, is darkly displayed, resulting in a dark image as a whole, so that display power consumption can be reduced. At this time, since the contour portion of a picture or the like is displayed brightly, the contour portion of an image such as a character or a picture can be recognized, so that it is possible to prevent the image from becoming difficult to see.

  In this embodiment, as will be described later, each contour component is extracted for each color component of red (R), green (G), and blue (B), and the image level of the contour portion for each color component. Is set to a bright image level set in advance, the contour portion can be extracted and displayed even in the case of an image in which the luminance does not change but the color changes.

  Next, the setting of the power saving display mode according to the present invention will be described with reference to FIGS. 2A and 2B are a display power saving mode setting screen and a table according to the present invention, FIG. 2A is a power saving display mode setting screen, FIG. 2B is an input screen example of the power saving display mode, and FIG. (C) illustrates a power saving display mode setting information table.

  The setting screen 200 of the power saving display mode shown in FIG. 2A is displayed by selecting and executing from a list of applications that can be activated by the portable information terminal 100 installed in advance. Displayed on the display unit of the unit / input unit (organic EL / touch panel) 101. The setting screen of the power saving display mode may be displayed by placing an application icon on the desktop of the screen and starting it in the same procedure as a general application software starting method.

  The color difference ratio setting item 201 for contour extraction sets a color change ratio that is a threshold value when the contour extraction unit 102 extracts a contour part of an image displayed on the display unit / input unit (organic EL / touch panel) 101. For example, when a black circle is displayed on a white background and a change between white and black is desired to be extracted, the setting is set to 100%. When the image data of each color of the image is white (R: 255, G: 255, B: 255), and black, the image data is represented by (R: 0, G: 0, B: 0), and the color difference is 255 ( 100%) is judged to be an outline portion with a difference in color.

  Usually, there is no 100% color change like white and black, and the difference in color change may be small. This is an item for setting the amount of color change according to the state of the original image. In the case of red (R) single color, red 100% is (R: 255, G: 0, B: 0) and red 0% (black) is (R: 0, G: 0, B: 0). Since the color difference of red is 255 (100%), it is determined that there is a difference and the contour portion.

  The contour bright color setting item 202 is an item for designating the brightness level at which the contour extracted by the contour extraction unit 102 is displayed by the bright color conversion unit 103. In this embodiment, white, gray (light gray), and yellow can be selected.

  The contour line width setting item 203 is an item that can be specified in dot units when the line width of the contour extracted by the contour extraction unit 102 is converted by the light color conversion unit 103, and specifies the width of the contour line in units of one dot. be able to.

  The background color dark color ratio setting item 204 is an item for designating the ratio of darkening the image level of the entire image data of the original image. When 100% is designated, the black screen (R: 0, G: 0, B: 0), and when it is 50%, the color ratio of each color is reduced to 50% for display. For example, 50% of white (R: 255, G: 255, B: 255) becomes gray (R: 127, G: 127, B: 127).

  The color difference ratio input area 206 of the color difference ratio setting item 201 for contour extraction, the light color input area 207 of the light color setting item 202 of the outline, the line width input area 208 of the line width setting item 203 of the outline, and the dark color of the background color In the dark color ratio numerical value input area 209 of the ratio setting item 204, a pull-down button for displaying a pull-down menu to be described later is arranged on the right side of the input area, and the display unit / input unit (organic EL / touch panel) 101 is displayed with a dedicated stylus pen. A pull-down menu is displayed by tapping the input part of the position of the pull-down button displayed in.

  The execution button 205 taps the display area of the execution button 205 with a dedicated stylus pen or a finger, and thereby the color difference ratio numerical value input area 206 of the color difference ratio setting 201 for contour extraction and the lightness of the outline light color setting 202 are displayed. Instruction for storing numerical data or character data input to the RAM 109 in the color input area 207, the line width mathematical input area 208 of the outline line width setting 203, and the dark color ratio numerical value input area 209 of the background color dark color ratio setting 204 The same function as the key operation at the execution input unit 104 is performed.

  The cancel button 210 terminates the power saving display mode setting program, and inputs an instruction for erasing the power saving display mode setting screen 200 from the display unit of the display unit / input unit (organic EL / touch panel) 101. Then, it is recognized by tapping the display area of the cancel button 210 with a dedicated stylus pen or a finger, and performs the same function as the key operation on the end input unit 105.

  The input screen example of the power saving display mode shown in FIG. 2B is to display a pull-down menu 218 when the pull-down button 216 of the color difference ratio input area 206 of the color difference ratio setting item 201 for contour extraction is tapped as a representative. In this example, a desired number can be input from the pull-down menu 218 by tapping with a dedicated stylus pen. Here, a pull-down menu is prepared for each item. For example, in the case of the outline bright color setting item 202, “white”, “gray”, and “yellow” are displayed as the pull-down menu.

  In the case of the outline line width setting item 203, “2 dots”, “3 dots”... Are displayed as a pull-down menu. In the case of the background color dark color ratio setting item 204, “50%”, “60%”... “100%” is displayed as a pull-down menu. When a number or character displayed in the pull-down menu 218 is tapped with a dedicated stylus pen, the number or character is selected, and the number or character is visually input into each of the input areas.

  The power saving display mode setting information table shown in FIG. 2C saves the information set on the power saving display mode setting screen shown in FIG. It is a power display mode setting information table 211.

  The A table 212 is an area for registering numerical data of color difference ratios for contour extraction, the B table 213 is an area for registering bright color information of contour lines, and the C table 214 is a numerical value of contour line widths. In the area for registering data, the D table 215 is an area for registering numerical data of the dark color ratio of the background color. The contour extraction unit 102, the light color conversion unit 103, and the dark color conversion unit 112 described above perform contour extraction, brightness of the contour, and background color based on the numerical values and information registered in the power saving display mode setting information table 211. Decided darkness.

  FIG. 3 is a flowchart of processing for setting the power saving display mode. The activation process of the power saving display mode setting program is started by selecting and executing from a list of applications that can be activated by the portable information terminal 100 installed in advance.

  In the power saving display mode setting program startup process (step S300), the window screen shown in the setting screen of the power saving display mode shown in FIG. 2A is displayed on the display unit / input unit (organic EL / touch panel) 101. This is a process of starting up an application program for causing the RAM 109 to store necessary information for the items displayed on the screen, and inputting necessary items for the items displayed thereafter.

  After the application program is started (step S300), a color difference ratio input process (step S301) for contour extraction is executed. In the color difference ratio input process (step S301) for contour extraction, numbers are selected by the input method described above with reference to FIG. 2, and the value (20%) selected in the frame of the color difference ratio input area 206 for contour extraction is displayed. This is a process of displaying and temporarily storing the selected value in the RAM 109.

  In the outline light color input process (step S302), white, gray, or yellow is selected by the input method described above with reference to FIG. 2, and the selected data (gray characters) in the frame of the outline light color input area 207 is selected. This is a process of storing the image data (R: 224, G224, B: 224) to be displayed and temporarily selected in the RAM 109.

  In the contour line width input process (step S303), a number is selected by the input method described above with reference to FIG. 2, and the selected value (2 dots) is displayed in the frame of the contour line width input area 208 to temporarily display the RAM 109. Is a process of storing the selected value in. In the background color dark color ratio input process (step S304), a number is selected by the input method described above with reference to FIG. 2, and the selected value (50%) is displayed in the frame of the background color dark color ratio input area 209. Is a process of storing the selected value in the RAM 109.

  Color difference ratio input processing for contour extraction (step S301), contour light color input processing (step S302), contour line width input processing (step S303), and background color dark color ratio input processing (step S304). In the processing stage, only the data is displayed on the screen as display data, and each data is also registered in the temporary storage area of the RAM 109.

  Next, an execution input determination process (step S305) is executed. The execution input determination process (step S305) is an input waiting process from the execution button 205 or the execution input unit 104, and when there is no input from the execution button 205 or the execution input unit 104, the next cancel input determination process (step S307). ). Cancel input is a process of waiting for input from the cancel button 210 or the end input unit 105. If there is no input from the cancel button 210 or the end input unit 105, the process returns to the color difference ratio input process (step S301) for contour extraction.

  If it is determined that there is an input from the cancel button 210 or the end input unit 105, the program is ended, and the “power saving display mode setting screen” shown in FIG. 2A is displayed on the display unit / input unit (organic EL / Erase from the display unit of the touch panel 101.

  When there is an input from the execution button 205 or the execution input unit 104 in the execution input determination process (step S305), the table registration process (step S306) is executed. In the table registration process (step S306), data is registered in the table shown in the power saving display mode setting information table of FIG.

  The data of the color difference ratio setting area 206 for contour setting is “20” in the A table 211, the data of the bright color setting area 207 of the contour line is “gray” in the B table 212, and the data of the line width setting area 208 of the contour is Data in the C table 214 is registered in the RAM 109 in the format of the power saving display mode setting information table in FIG. 2C, with “2” in the C table 214 and “50” in the dark color ratio setting area 209 of the background color.

  A display processing flow in the power saving display mode according to the present invention will be described with reference to FIG. FIG. 8 is a power saving display processing flowchart according to the present invention. The display switching input unit determination process (step S800) is a process of determining whether the display switching input unit 107 is in the standard display mode or the power saving display mode.

  In the “power saving display mode”, a power saving display data creation process (step S801) is executed next. The power saving display data creation process (step S801) is a process for generating a power saving display screen. The display unit / input unit (organic EL / touch panel) 101 created by the CPU 108 as an image generation unit and temporarily stored in the RAM 109 is used. The image data of the original image to be displayed on the display unit is read out, the contour extracting unit 102 extracts the horizontal and / or vertical contours of the screen, and the bright color converting unit 103 sets the image level of the contour in advance. The image data is converted into contour image data having a bright image level.

  On the other hand, the image data of the original image read from the RAM 109 is converted into background image data having a dark image level with a preset ratio, and the contour image data and the background image data are overlapped by the mixing unit 113 to display power saving. Image data is created and temporarily stored in the RAM 109 via the CPU 108.

  In the power saving display process (step S802), the power saving display image data generated in the power saving display data creation process (step S801) and temporarily stored in the RAM 109 is read, and the display unit / input unit (organic EL / touch panel) is read. This is a process of displaying on the display unit. In the display switching input unit determination process (step S800), when the “standard display mode” is set, the image data of the original image which is created by the CPU 108 and temporarily stored in the RAM 109 and not subjected to the power saving display processing is read and displayed. The standard display process (step S803) to be displayed on the display unit of the unit / input unit (organic EL / touch panel) is executed.

  A screen example in the power saving display mode according to the present invention will be described with reference to FIG. FIG. 7 is a diagram illustrating a screen example in the power saving display mode according to the present invention. An original image 701 is an example of a screen in the standard display mode, and shows a case where an image of a portable information terminal, black characters 706, and black lines 707 are displayed on a white background 702. The portable information terminal includes a light gray case 703, a dark gray display unit 704, and a black button 705. In such an image, a bright white color is often used. Thus, when there are many white parts, the power consumption of a self-luminous display device such as an organic EL display increases.

  A power saving image 711 is an example of a screen in the power saving display mode. Based on information registered in the power saving display mode setting information table 211 in FIG. 2B, a white background 702 and a light gray case 703 are displayed. , The boundary between the light gray case 703 and the dark gray display portion 704, and the boundary between the light gray case 703 and the black button 705 are extracted as the contour portion A, and the gray brightness of 2 dots thick is extracted. This is displayed by the contour portions A721 and 722.

  The image levels of the flat portion 712 of the background 702, the flat portion 713 of the case 703, and the flat portion 714 of the display unit 704 are 50% of the original image, and the flat portion 715 of the black button 705 is a black image. It becomes. In addition, since it is difficult to read a portion that is not the outline portion of the picture such as the character 706 and the line 707 with the designated 2 dots, it is displayed with the characters 716 and the lines 717 having a gray thickness of 1 dot. It has become.

  Although details will be described later, when there is no designated two dots by detecting the length between the contour portions, the dot is displayed as one dot. As described above, the outline portion which is a part of the entire image is brightly displayed, and the background (flat portion) which is a large portion of the entire image is darkly displayed, resulting in a dark image as a whole, thereby reducing display power consumption. Can do.

  Next, the image level of the power saving image according to the present invention will be described with reference to FIG. 9 is an image level image diagram of a power saving image according to the present invention, FIG. 9A is an image level of an original image, FIG. 9B is an outline extraction image, FIG. 9C is a dark color conversion image, FIG. 9D is a power saving image. Here, description will be made with reference to the image portion of the A line portion of FIG. Further, here, a case will be described where each color component of (R, G, B) has the same image level.

  As shown in FIG. 9A, since the background image 902 is white in the original image, the image data is “255”, the display unit 904 is dark gray, the image data is “127”, and the line 907 is black, so the image data is “0”. It has become.

  A contour portion is extracted from the original image by the contour extraction unit 102, and converted to the image level of the contour extraction image shown in FIG. 9B by the bright color conversion unit 103. Based on the information on “gray” for the bright color setting of the contour line and the information on “2 dots” for the line width setting of the contour registered in the power saving display mode setting information table 211 in FIG. An outline portion A921 having a “gray” line width “2 dots” is generated, and a line 907 portion generates a line 921 having an image level “gray” line width “1 dot”.

  On the other hand, this dark image is converted from the original image to the image level of the dark color converted image shown in FIG. Based on the information “50%” of the background color dark color ratio setting registered in the power saving display mode setting information table 211 in FIG. 2B, the image level of the original image is set to 50%. For example, the background 912 of the image data “127” and the display unit 914 of the image data “64” are generated.

By superposing the contour extraction image of FIG. 9B and the dark color conversion image of FIG. 9C by the mixing unit 113, the power saving image shown in FIG. 9D is generated.
Here, the case where the color components of (R, G, B) are the same image level has been described, but in this embodiment, contour extraction, light color conversion, and dark color conversion are performed for each color component. Therefore, it is possible to cope with the case of a single color or when the image level is different for each color component.

  Next, specific processing of contour extraction, light color conversion, and dark color conversion according to the present invention will be described in detail with reference to FIGS. FIG. 4 is an explanatory diagram of dots on the screen according to the present invention, FIG. 5 is a flowchart of color change point extraction, light color conversion and dark color conversion processing in the X direction according to the present invention, and FIG. 6 is a color change point extraction in the Y direction according to the present invention. FIG. 10 is a flowchart of bright color conversion processing.

  The screen configuration 400 is a screen displayed on the display unit of the display unit / input unit (organic EL / touch panel) 101 of the portable information terminal 100. In this embodiment, the screen configuration 400 is vertical (Y direction) 480 dots, horizontal (X direction). 320 dots.

  In the processing of the flowchart of the color change point extraction, light color conversion and dark color conversion processing in the X direction in FIG. 5 described later, (X1, Y1) and (X2, Y1) based on the leading dot (X1, Y1) 402, The degree of color change (color difference) is obtained by comparing (X2, Y1), (X3, Y1)..., And the image data of each color between the dots in the X direction, and a horizontal outline is extracted.

  When reaching 320 dots in the X direction, a process of comparing image data between dots in the X direction of the Y2 line is executed, and a process of comparing image data between dots up to 480 lines in the Y direction (1 to 480 lines) 401 Execute. Further, in the process of the Y direction color change point extraction and light color conversion process flow chart of FIG. 6 to be described later, (X1, Y1), (X1, Y2), (X1, Y2), (X1, Y3)... And the image data of each color between the dots in the Y direction are compared to obtain the degree of color change (color difference) and extract the vertical contour.

  When reaching 480 dots in the Y direction, a process of comparing image data between dots in the Y direction of the X2 column is executed, and image data comparison processing between dots is performed up to 320 columns in the X direction (1 to 320 columns) 403. Execute. A dot enlarged view 405 is an enlarged view of each dot, and three colors of R, G, and B shine. Each color number 404 has image data for each color as data. When the image data of (R, G, B) is (0, 0, 0), the display color is black and the most power is not consumed, and the image data of (R, G, B) is (255). 255, 255), the display color is white and the most power is consumed.

  FIG. 5 is a flowchart of X-direction color change point extraction, light color conversion, and dark color conversion processing. The initial setting process (step S500) is a process for setting the initial value of the flow. The first dot (X1, Y1) 402 in FIG. 4 and the color change point start flag for determining the “start” or “end” of the color change point. This is a process of substituting the initial value “start” for. The color change point start flag is used for determining whether or not the line thickness of the contour portion can be increased.

  In the dark color generation process (step S505), the display color is darkened by the ratio set in the dark color ratio setting 204 of the background color. Specifically, when 50% is set, the original color is (R: 255, G: 255, B: 255) and the white display is (R: 127, G: 127, B127) and the gray color is displayed. Become. As calculation methods, R: 255 × 0.5 (50%) = 127 (rounded down to the decimal point), G: 255 × 0.5 (50%) = 127 (rounded down to the decimal point), B: 255 × 0.5 (50%) = 127 (rounded down).

  In the present invention, the dot whose color is specifically changed is (X1, Y1). For example, when the (X2, Y1) dot and the (X3, Y1) dot are compared, the (X2, Y1) dot is the color. It becomes a change target dot. The changed image data is stored in the RAM 104 as a dark color converted image without rewriting the original image data.

The color difference determination process (step S501) is a process for determining whether the color differences of R, G, and B in the dots described with reference to FIG. 4 exceed the value set in the color difference ratio setting 201 for contour extraction. is there.
More specifically, this is a process for determining by comparing the color differences of the R, G, and B colors of adjacent dots arranged in the X direction. The image data of each dot described in FIG. 4 is stored in the RAM 104, and the image data is taken into the work area of the RAM 109 during the comparison process, and the comparison process is executed.

  First, R, G, B colors of (X1, Y1) and (X2, Y1) dots are compared, and then R, G, B colors of (X2, Y1) and (X3, Y1) dots are compared. Compare When a color change of 20% is set, the case where a difference of 255 × 0.2 (20%) = 51 as a numerical value is set to “true”, and the next color change start / end confirmation process (step S502) is executed.

  If the color difference is less than 20% (51), a column end confirmation process (step S511) is executed. The column end confirmation process (step S511) is a process for determining whether the comparison of all X1 to X320 dots in the Y1 row has been completed. The adjacent dots of the X1 to X320 dots in the Y1 row are compared, and if (X320, Y1) is reached, the result is “true”, and the next column initialization process (step S514) is executed. If (X320, Y1) is not reached, the result is “false”, and column addition processing (step S509) is executed.

  The column addition process (step S509) is a process of adding a number of one dot in the X direction. For example, when the column addition process (step S509) is performed on (X1, Y1), the result is (X2, Y1). The column initialization process (step S514) is a process for returning X320 to X1. After executing the column initialization process (step S514), the row end confirmation process (step S515) is executed.

  The line end confirmation process (step S515) is a process for determining whether or not the dot comparison process has reached 480 lines (Y480) in the Y direction. When it reaches 480 lines (Y480) in the Y direction, it becomes “true” and all the processes are terminated. If the number does not reach 480 lines (Y480) in the Y direction, the result is “false”, and the line addition process (step S513) is executed.

  The line addition process (step S513) is a process of adding one line in the Y direction, and Y2 follows Y1. Each dot is compared as in (X1, Y1) and (X2, Y1) (X319, Y1) and (X320, Y1). When X reaches 320 dots, 1 is added in the Y direction. (X1, Y2) and (X2, Y2)... (X319, Y2) and (X320, Y2), and (X1, Y480) and (X2, Y480)... (X319, Y480) and (X320, Y480) perform color comparison processing for all dots.

  After executing the column addition process (step S509) and the row addition process (step S513), the process returns to the color difference determination process (step S501). If the color difference exceeds the specified value in the color difference determination process (step S501), the result is “true”, and the color change point start / end confirmation process (step S502) is executed.

  The color change point start / end confirmation process (step S502) is a process for determining “start” or “end” of a place where there is a color change. First, the color change point start / end flag set in the initial setting process (step S500) is set. Because it sees, it becomes "beginning". If the color change point start flag is “start”, color change start point storage processing (step S504) is executed next.

  In the color change start point storage process (step S504), when there is a color change in comparison of (X1, Y1) and (X2, Y1), for example, (X2, Y1) is a color change point. This is a process of temporarily storing in the RAM 109 as the start position. Next, an end-to-end flag “end” setting process (step S506) is executed.

  The end / end flag “end” setting process (step S 506) is a process for enabling the color change point end / end confirmation process (step S 502) to recognize that the start point position data has been registered in the RAM 109 and stored. is there.

  After the end / end flag “end” setting process (step S506), the above-described column end confirmation process (step S511) is executed. When the color change point start / end confirmation process (step S502) indicates that the color change point start / end flag is “end”, a color change completion point storage process (step S503) is executed.

  In the color change end point storage process (step S503), when there is a color change in comparison between (X3, Y1) and (X4, Y1), for example, (X3, Y1) changes in color. This is a process of temporarily storing the point end position in the RAM 104. When there is a color change for only one dot, the (X2, Y1) dots become “start” and “end” dots, and the color change for one dot can be recognized. Next, a start / stop flag “start” setting process (step S507) is executed.

  The start / stop flag “start” setting process (step S507) is a process for storing the end point registration completion. After the start / stop flag “start” setting process (step S507), a bright color generation process (step S508) is executed.

  The bright color generation process (step S508) is a process of registering the color number of the color designated by the bright color setting 202 of the contour line in the designated dot. The registration target dots are dots registered in the color change start point storage process (step S504) and the color change end point storage process (step S507). In this case, gray (R: 224, G: 224, B: 224). Since this is a registration, this color number is stored in the RAM 104 as new image data.

  As described above, the original image data is not rewritten and registered as a contour extraction image. After executing the bright color generation process (step S508), the line width setting value confirmation (step S510) is executed. The line width setting value confirmation (step S510) is a process of confirming an interval (dot coordinate interval is 1 dot or less) that satisfies the line width set in the outline line width setting 203 or that the line width cannot be increased.

  Judgment is made from the dot distances stored in the color change start point storage process (step S504) and the color change end point storage process (step S503). For example, when only one dot change point can be detected, the dot (X5, Y1) stored in the color change start point storage process (step S504) and the dot (X5, Y1) stored in the color change end point storage process (step S503) ) Matches. If the condition is not satisfied in the line width setting value confirmation (step S510), the line width addition process (step S512) is executed.

  The line width addition process (step S512) is a value (in this case, 2) input to the outline line width setting area 208 of the outline line width setting item 203 set in the setting screen of FIG. Specify the minute dot. For example, in the case of the start dot (X3, Y1) and the end dot (X5, Y1), the bright color generation processing (step S508) has already been executed for one dot. Therefore, the color change start point is set to (X2, Y1), the color change end point is set to (X6, Y1), and then the bright color generation process (S508) is executed.

  FIG. 6 is a flowchart of color change point extraction in the Y direction and light color conversion processing. The initial setting process (step S600) is a process for setting the initial value of the flow. The first dot (X1, Y1) 402 in FIG. 4 and the color change point start flag for determining the “start” or “end” of the color change point. This is a process of substituting the initial value “start” for.

  The color change point start flag is used for determining whether or not the line thickness of the contour portion can be increased. The color difference determination process (step S601) is a process for determining whether the color differences of R, G, and B in the dots described with reference to FIG. 4 exceed the value set in the color difference ratio setting 201 for contour extraction. is there.

  More specifically, this is a process for determining by comparing the color differences of the R, G, and B colors of adjacent dots arranged in the Y direction. The image data of each dot described in FIG. 4 is stored in the RAM 104, and the image data is taken into the work area of the RAM 109 during the comparison process, and the comparison process is executed.

  First, the R, G, and B colors of the (X1, Y1) dot and the (X1, Y2) dot are compared, and then the R, G, and B colors of the (X1, Y2) and (X1, Y3) dots are compared. Compare When a color change of 20% is set, a case where a difference of 255 × 0.2 (20%) = 51 as a numerical value is set to “true”, and the next color change start / stop confirmation process (step S602) is executed. If the color difference is less than 20% (51), the line end confirmation process (step S611) is executed.

  The line end confirmation process (step S611) is a process for determining whether or not the comparison has been completed for all the Y1 to Y480 dots in the X1 line. The adjacent dots of Y1 to Y480 in the X1 row are compared, and if (X1, Y480) is reached, the result is “true”, and the next row initialization process (step S614) is executed. If (X1, Y480) is not reached, the result is “false”, and the row addition process (step S609) is executed.

  The line addition process (step S609) is a process of adding a number for one dot in the Y direction. For example, when the line addition process (step S609) is performed on (X1, Y1), the result is (X1, Y2). The row initialization process (step S614) is a process for returning Y480 to Y1. After the row initialization process (step S614) is executed, the column end confirmation process (step S615) is executed.

  The column end confirmation processing (step S615) is processing for determining whether or not the dot comparison processing has reached 320 columns (X320) in the X direction. When it reaches 320 columns (X320) in the X direction, it becomes “true” and all the processes are terminated. If it has not reached 320 columns (X320) in the X direction, it becomes “false”, and column addition processing (step S613) is executed.

  The column addition process (step S613) is a process of adding one column in the X direction, and the next to X1 is X2. Each dot is compared as (X1, Y1) and (X1, Y2) (X1, Y479) and (X1, Y480), and when Y reaches 480 dots, 1 is added in the X direction. (X2, Y1) and (X2, Y2)... (X2, Y479) and (X2, Y480), and (X320, Y1) and (X320, Y2). The color comparison process is executed for all dots from Y479) to (X320, Y480).

  After executing the row addition process (step S609) and the column addition process (step S613), the process returns to the color difference determination process (step S601). When the color difference exceeds the specified value in the color difference determination process (step S601), the result is “true”, and the color change point start / end confirmation process (step S602) is executed.

  The color change point start / end confirmation process (step S602) is a process of determining “start” or “end” of a place where there is a color change. First, the color change point start / end flag set in the initial setting process (step S600) is set. Because it sees, it becomes "beginning". If the color change point start flag is “start”, color change start point storage processing (step S604) is executed next.

  The color change start point storage process (step S604) is a dot having a color change, for example, when there is a color change in the comparison of (X1, Y1) and (X2, Y1), (X2, Y1) is the color change point. This is a process of temporarily storing in the RAM 109 as the start position.

  Next, an end-to-end flag “end” setting process (step S606) is executed. The end / end flag “end” setting process (step S606) is a process that allows the color change point end / end confirmation process (step S602) to recognize that the start point position data has been registered in the RAM 109 and stored. is there. After the end / end flag “end” setting process (step S606), the above-described column end confirmation process (step S611) is executed. If the color change point start / end confirmation process (step S602) indicates that the color change point start / end flag is “end”, a color change completion point storage process (step S603) is executed.

  In the color change end point storage process (step S603), when there is a color change in comparison between (X3, Y1) and (X4, Y1), for example, (X3, Y1) changes in color. This is a process of temporarily storing the point end position in the RAM 104. When there is a color change for only one dot, the (X2, Y1) dots become “start” and “end” dots, and the color change for one dot can be recognized.

  Next, a start / stop flag “start” setting process (step S607) is executed. The start / stop flag “start” setting process (step S607) is a process for storing the end point registration completion. After the start / stop flag “start” setting process (step S607), a bright color generation process (step S608) is executed.

  The bright color generation process (step S608) is a process of registering the color number of the color designated by the bright color setting 202 of the contour line in the designated dot. The registration target dots are those registered in the color change start point storage process (step S604) and the color change end point storage process (step S607), and in this case, gray (R: 224, G: 224, B: 224). Since this is a registration, this color number is stored in the RAM 104 as new image data.

  As described above, the original image data is not rewritten and registered as a contour extraction image. After executing the bright color generation process (step S608), line width setting value confirmation (step S610) is executed.

  The line width setting value confirmation (step S610) is a process of confirming an interval (dot coordinate interval is 1 dot or less) that satisfies the line width set in the outline line width setting 203 or that the line width cannot be expanded. Judgment is made from the dot distances stored in the color change start point storage process (step S604) and the color change end point storage process (step S603). For example, when only one dot change point can be detected, the dot (X1, Y5) stored in the color change start point storage process (step S604) and the dot (X1, Y5) stored in the color change end point storage process (step S603) ) Matches.

  If the condition is not satisfied in the line width setting value confirmation (step S610), the line width addition process (step S612) is executed. The line width addition process (step S612) is a value (in this case, 2) input to the outline line width setting area 208 of the outline line width setting item 203 set on the setting screen of the power saving display mode in FIG. Specify the minute dot.

  For example, in the case of the start dot (X1, Y3) and the end dot (X1, Y5), the bright color generation processing (step S608) has already been executed for one dot. Thus, the color change start point is set to (X1, Y2), the color change end point is set to (X1, Y6), and then the bright color generation process (step S608) is executed.

  By performing the processing as described above, the display power of the portable terminal type information terminal equipped with a self-luminous display device such as an organic EL can be reduced, and the battery driving time can be extended.

1 is a block diagram illustrating a configuration of a portable information terminal according to the present invention. It is a setting screen and table figure of the power saving display mode by this invention. It is a setting process flowchart figure of the power saving display mode by this invention. It is dot explanatory drawing of the screen by this invention. It is a flowchart figure of the color change point extraction of X direction by this invention, light color conversion, and dark color conversion processing. It is a flowchart figure of the color change point extraction of Y direction by this invention, and a bright color conversion process. It is an example of a screen in the power saving display mode according to the present invention. It is a power saving display process flowchart figure by this invention. It is an image figure of the image level of the power saving image by this invention.

Explanation of symbols

100 Portable Information Terminal 101 Display Unit / Input Unit (Organic EL / Touch Panel)
102 Outline Extraction Unit 103 Bright Color Conversion Unit 104 Execution Input Unit 105 End Input Unit 106 Power Supply Unit 107 Display Switching Input Unit 108 CPU
109 RAM
110 ROM
DESCRIPTION OF SYMBOLS 111 Battery part 112 Dark color conversion part 200 Power saving display mode setting window 201 Color difference ratio setting item for contour extraction 202 Bright color setting item for contour line 203 Line width setting item for contour line 204 Dark color ratio setting item for background color Button 206 Color difference ratio input area 207 Light color input area 208 Line width input area 209 Dark color ratio numerical value input area 210 Cancel button 211 Power saving display mode setting information table 212 A table 213 B table 214 C table (contour line width setting)
215 D table (background color dark color ratio setting)
216 pull-down button 218 pull-down menu 400 screen configuration 401 Y direction (1st to 480th lines)
402 First dot (X1, Y1)
403 X direction (1 to 320 columns)
404 R, G, B color numbers 405 Dot enlarged view 701 Original image 702 Background 703 Case 704 Display unit 705 Button 706, 716 Character 707, 717 Line 711 Power-saving image 712, 713, 714, 715 Flat part 721, 722 Outline Part A

Claims (5)

In a portable information terminal comprising a self-luminous type display unit and an image generation unit for generating image data for displaying images such as characters and pictures on the display unit,
A contour extraction unit that extracts a contour portion of an image of the image data generated by the image generation unit; and a light color conversion unit that converts the contour portion extracted from the image by the contour extraction unit into contour image data of a predetermined image level; A dark color conversion unit that converts the entire image of the image data generated by the image generation unit into background image data of a predetermined ratio of the image level,
A portable type comprising means for displaying image data in which outline image data converted by the bright color conversion unit is superimposed on background image data of a predetermined ratio converted by the dark color conversion unit Information terminal. The portable information terminal according to claim 1, wherein
The contour extraction unit extracts a contour part for each color component, and the bright color conversion unit converts the color component extracted by the contour extraction unit into contour image data having a predetermined image level. Portable information terminal. The portable information terminal according to claim 1 or 2,
A portable information terminal comprising means for designating the predetermined image level in the light color conversion unit. The portable information terminal according to any one of claims 1 to 3,
A portable information terminal comprising means for designating a thickness of an outline in the light color conversion unit. A program for a portable information terminal comprising a self-luminous type display unit and an image generation unit for generating image data for displaying images such as characters and pictures on the display unit,
A contour extraction unit that extracts a contour portion of an image of the image data generated by the image generation unit; a light color conversion unit that converts the contour portion extracted from the contour extraction unit image into contour image data of a predetermined image level; A dark color conversion unit that converts the entire image of the image data generated by the image generation unit into background image data of a predetermined image level,
For a portable information terminal that realizes display of image data obtained by superimposing contour image data converted by the light color conversion unit on background image data of an image level of a predetermined ratio converted by the dark color conversion unit program.

Images