JPH0744984U - Map display - Google Patents

Abstract

(57) [Abstract] [Purpose] The visibility is improved by changing the display color of the map display device that is color-displayed. [Structure] The central control device 3 that has read the map information from the information storage medium 2 searches for the pallet number of the specific information in the map information displayed on the display unit 20 according to the operation signal from the input unit 8, By changing the palette register value corresponding to the palette number stored in the palette register 5, the color tone and brightness of the display information are changed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a map display method, and more particularly to a map display method that operates in association with a navigation device used in an automobile.

[0002]

[Prior art]

 Conventionally, a map display device 11 used for a navigation device reads out map information from a map information storage medium 16 such as a CD-ROM via a media controller 17, as shown in FIG. After being stored in the memory 18, the necessary map information is displayed on the display unit 15 via the image memory 19 and the graphic display controller 20.

[Problems to be solved by the present invention]

However, in the map information stored in the map information storage medium 16, in addition to road data, a lot of information such as characters such as buildings and place names, rivers, railways, and intersection names are all displayed on one screen. Since it is displayed, it is difficult to find specific information such as a parking lot on the map while continuing to drive. For this reason, conventionally, as shown in FIG. 6, it has been attempted to improve visibility by color-coding each attribute of information to be displayed, but when a lot of information is displayed at one time, the screen is rather changed. There was a problem that it became difficult to see.

[0004]

[Means for Solving the Problems]

 In order to solve such a problem, the present invention has an information storage medium storing map information in which a pallet number is assigned to each information, a display device for displaying the map information, and an input unit for operating the display content. The central control unit that reads the ground map information from the information storage medium based on the operation signal from the input unit and outputs the control signal based on the operation signal, and the palette register value that represents the display color corresponding to each palette number. It also has a palette register for recording and changing the palette register value based on a control signal and outputting it to the display device.

[0005]

[Action]

 In the present invention, when the target information is designated by the input unit, the palette register changes the palette register value corresponding to the designated information in the map information and / or other information and outputs it to the display device. The color tone and brightness of the displayed map information are instantly changed, and the visibility of the map information can be improved.

[0006]

【Example】

 An embodiment according to the present invention will be described with reference to FIGS. FIG. 1 is a block diagram of an embodiment according to the present invention. FIG. 2 is a diagram showing the structure of a pallet register according to an embodiment of the present invention. FIG. 3 is a flowchart of the operation of the embodiment according to the present invention. FIG. 4 is a diagram showing a display screen of an embodiment according to the present invention.

As shown in FIG. 1, the map display device A includes a sensor -1, which detects the current position and outputs the current position information g, a map information storage medium 2 which provides the map information a, a control unit 10, and an operation. The input unit 8 that outputs the signal f and the display unit 20 are included. In addition, the control unit 10 receives the current position information g, the map information a, and the operation signal f, outputs the map information a and the control signal c, and the video RAM 4 that stores the map information a corresponding to the display area. , The palette register 5 for changing the information about the color tone and brightness of the map information a read to the video RAM 4 based on the control signal c, and the output of the palette register 5 is D / A converted and output to the display unit 20. It is composed of a D / A converter 6. The input unit 8 is a keyboard (a touch panel or the like may be used) for operating the map display device, and the display unit 20 is composed of a display device 7 such as a CRT or LCD (liquid crystal display device). .

As shown in FIG. 2, the information on the color tone and brightness of each pixel of the map information a read from the map information storage medium 2 is a 4-bit palette number of α, β, γ, δ, as shown in FIG. No. (1111). As shown in Table 1, the palette register 5 stores palette numbers (0000) to (1111) and palette register values representing color tone and brightness corresponding to the palette number. The palette register value has a brightness gradation of 4 bits for each color of R, G and B, and is arbitrarily selected from 4096 colors. The palette register 5 can change the palette register value of each palette number based on the control signal c from the CPU 3. In addition, objects having the same attribute in the map information are set to the same palette number, that is, the same color. For example, in Table 1, the parking lot is pallet number 1 and the palette register value is set to "008" (blue). Incidentally, in the case of the present embodiment, since the pallet number is represented by 4 bits, 16 types of attributes can be set.

The operation of this embodiment having such a configuration will be described. Now, when searching for a parking lot from the map displayed on the display unit 20, first, the target attribute (in this case, parking lot) is input by the input unit 8. As shown in FIG. 3, when the operation signal f is input (STEP 101), the CPU 3 retrieves the pallet number corresponding to the parking lot (STEP 103). Next, the control signal c is output to the palette register 5, and all the palette register values other than the palette number in the palette register 5 are rewritten to gray (AAA) (STEP 104). As a result, on the displayed map, as shown in Fig. 4a, only the part corresponding to the parking lot is displayed in blue, and the rest is displayed in gray, so that the parking lot can be quickly found on the displayed map. be able to.

Further, when it is desired to end this display, as shown in FIG. 3b, when there is an operation signal f from the input section 8 (STEP 105), the control signal c is sent from the CPU 3 to the pallet register 5 for all pallet numbers. It is possible to return to the normal display by returning the palette register value of (STEP106). Further, FIG. 3c is a flow chart when another display is performed according to this embodiment, but in this case, the palette register value of the object (for example, parking lot) of the attribute to be emphasized is rewritten as (00F). As a result (STEP109), as shown in FIG. 4B, the display is performed with higher brightness than the surrounding display, and the visibility can be improved. In this way, by rewriting the contents of the palette register 5, it is possible to change the color tone and the brightness of the display of the display section 20 without rewriting the data of the video RAM 4.

[0011]

[Effect of device]

 Thus, in the present invention, when the target information is designated in the input section, the palette register changes the palette register value corresponding to the designated information in the map information and / or other information, and the displayed map is displayed. Since the display color of information can be changed instantly, the visibility of map information can be improved.

[Table 1]

[Submission date] November 12, 1991

[Procedure correction 6]

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[Correction content]

As shown in FIG. 2, the information on the color tone and brightness of each pixel of the map information a read from the map information storage medium 2 is a 4-bit palette number of α, β, γ, δ, as shown in FIG. No. (1111). As shown in Table 1, the palette register 5 stores palette numbers (0000) to (1111) and palette register values representing color tone and brightness corresponding to the palette number. The palette register value has a brightness gradation of 4 bits for each color of R, G and B, and is arbitrarily selected from 4096 colors. The palette register 5 can change the palette register value of each palette number based on the control signal c from the CPU 3. In addition, objects having the same attribute in the map information are set to the same palette number, that is, the same color. For example

[Table 1] In, the parking lot is pallet number 1, and the pallet register value is set to "008" (blue). Incidentally, in the case of the present embodiment, since the pallet number is represented by 4 bits, 16 types of attributes can be set.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment according to the present invention.

FIG. 2 is a diagram showing a configuration of a pallet register according to an embodiment of the present invention.

FIG. 3 is a flowchart of the operation of the embodiment according to the present invention.

FIG. 4 is a diagram showing a display screen according to an embodiment of the present invention.

FIG. 5 is a block diagram of a map display device according to a conventional technique.

FIG. 6 is a diagram showing a display screen of a map display device according to a conventional technique.

[Explanation of symbols]

 1 sensor 2 map information storage medium 3 CPU 4 video RAM 5 pallet register 6 D / A comparator 7 display device 8 input unit 10 control unit 20 display unit

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[Submission date] November 12, 1991

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[Submission date] June 3, 1993

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[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment according to the present invention.

FIG. 2 is a diagram showing a configuration of a pallet register according to an embodiment of the present invention.

FIG. 3 is a flowchart of the operation of the embodiment according to the present invention.

FIG. 4 is a diagram showing a display screen according to an embodiment of the present invention.

FIG. 5 is a block diagram of a map display device according to a conventional technique.

FIG. 6 is a diagram showing a display screen of a map display device according to a conventional technique.

[Explanation of reference numerals] 1 sensor 2 map information storage medium 3 CPU 4 video RAM 5 palette register 6 D / A comparator 7 display device 8 input unit 10 control unit 20 display unit

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Claims (1)

[Scope of utility model registration request] 1. An information storage medium in which map information having a pallet number assigned to each piece of information is recorded, a display device for displaying the map information, an input section for operating display contents, and an operation signal from the input section. A central controller that reads map information from the information storage medium based on the control signal and outputs a control signal based on the operation signal, and records a palette register value that represents a display color corresponding to the palette number and records the control signal in the control signal. A pallet register for changing the pallet register value based on the pallet register value and outputting the pallet register value to the display device. When the target information is specified by the input unit, the pallet register corresponds to the specified information and / or other information. A map display device, wherein a register value is changed and output to the display device.