JP2000276128A - Image displaying method and image display device using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To see an under-picture though it is overlapped with an over-picture by deviating respective color elements RGB constituting both pixel data of a part where an under-picture image and an over-picture image are overlapped by 1 bit and then synthesizing them so as to see the under-picture image through the over-picture image. SOLUTION: Image data outputted from an over-picture image data memory 31 is supplied to a first data shift means 34. Image data supplied to the means 34, namely each color element of R, G, B is bit-shifted to be smaller by the portion of one digit. A second image synthesizing means 38 sticks a new synthetic image synthesized by a first image synthesizing means 37 to image data to be supplied from a watermark area image data detecting means 35, namely a pulled-out part in image data remaining after pulling out over-picture image data from an under-picture image data memory 32, to synthesize. Thus, a watermark image can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an image display apparatus for displaying a plurality of image data on a display unit in a superimposed manner.

[0002]

2. Description of the Related Art First, an image display apparatus of this type will be described below with reference to a vehicle electronic meter shown in FIGS. That is, the electronic meter 1 shown in FIG. 8 has a single liquid crystal display panel 2, a gear position display 3 at the center of the liquid crystal display panel 2, and an engine speed display 4 on both sides thereof. A vehicle speed display 5 is provided, a travel distance display 6 is provided below the gear position display 3, a direction change display 7 is provided above the gear position display 3, and furthermore, an engine speed display 4 and a vehicle speed display 5 are provided. A first warning display 8 is provided below each, an engine temperature display 9 and a fuel remaining amount display 10 are provided below the left and right outer sides, and second warning displays 11 and 12 are provided above the outer side.

In order to perform such display using one liquid crystal display panel 2, the microcomputer 13 that controls the display of the liquid crystal display panel 2 includes a first memory 1.
In FIG. 10, color image data composed of each color element of R (abbreviation of RED), G (abbreviation of GREEN), and B (abbreviation of BLUE) necessary for the engine speed display 4 and the vehicle speed display 5, which are sketch images, are shown in FIG. ) Is stored in the second memory 15, and color image data (see FIG. 11) composed of R, G, and B color elements required for the gear position display 3 is stored, and the mileage display 6 is stored in the third memory 16. , Color image data composed of R, G, and B color elements (see FIG. 12) necessary for the direction conversion display 7 in the fourth memory 17 are stored. The image data (see FIG. 13) is stored. The fifth memory 18 stores the color image data (see FIG. 14) required for the first warning display 8 and composed of the R, G, and B color elements. Engine temperature display 9 and fuel remaining amount table in memory 19 10 to the desired, R, G, and stores the color image data consisting of the respective color elements of B (see FIG. 15), a second warning display to the seventh memory 20 11,1
2 stores color image data (see FIG. 16) composed of R, G, and B color components.

[0004] By storing the image data in this manner, the microcomputer 13 first operates the first memory 1.
The color image data (see FIG. 10) of each of the R, G, and B color components related to the engine speed display 4 and the vehicle speed display 5 which are the sketch images stored in 4 are read and the engine speed is set in the background color A. The numerical display 4 and the vehicle speed display 5 are displayed on the liquid crystal display panel 2 in a background color C of a predetermined color. The first
The memory 14 stores an address indicating where the read image data is displayed on the display surface of the liquid crystal display panel 2. Further, an address indicating at which address of the image data stored in the first memory 14 the data of the upper picture image (the image to be superimposed and displayed on the lower picture image) is stored.

[0005] Then, the microcomputer 13
Gear position display 3 stored in memory 15 (see FIG. 11)
, Color image data composed of R, G, and B color elements (consisting of a background color C and a character portion D), and extracting only the character portion D from the background color C, and extracting it from the sketch image shown in FIG. Paste on the background color A part. Note that such a method of extracting the character portion D and switching the background color to the background color A in FIG. 10 are performed based on the method described in the prior art (Japanese Patent Laid-Open No. Hei 10-198781). .

Further, color image data (consisting of a background color E and a character portion F) composed of R, G, and B color elements according to the travel distance display 6 (see FIG. 12) stored in the third memory 16 is read. , Extracting only the character portion F from the background color E and extracting it based on the method described in the prior art,
It is pasted on the background color A portion of the sketch image shown in FIG.

[0007] Color image data (consisting of a background color G and a character portion H) composed of R, G, and B color elements according to the direction conversion display 7 (see FIG. 13) stored in the fourth memory 17.
And extract only the character portion H from the background color G,
Based on the method described in the prior art, FIG.
It is pasted on the background color A portion of the sketch image shown in FIG.

[0008] Color image data (background color I and character frame portion J) consisting of R, G, and B color elements according to the first warning display 8 (see FIG. 14) stored in the fifth memory 18
) Is read, and only the character frame portion J is extracted from the background color I, and is pasted on the background color A portion of the sketch image shown in FIG. 10 based on the method described in the prior art.

The engine temperature display 9 (see the right diagram in FIG. 15) and the fuel remaining amount display 10 (FIG. 15) stored in the sixth memory 19
According to the prior art, color image data (consisting of a background color K and a character portion L) consisting of R, G, and B color components according to the related art is read, and only the character portion L is extracted from the background color K. Is attached to the background color A portion of the sketch image shown in FIG. The color image data (consisting of the background color M and the character frame portion N) of each of the R, G, and B color elements according to the second warning display 8 (see FIG. 16) stored in the seventh memory 20 is read. Only the character frame portion N is extracted from the background color M, and it is pasted on the background color A portion of the sketch image shown in FIG. 10 based on the method described in the above-mentioned prior art.

Next, the operation of the above configuration will be described with reference to FIG. When the power is turned on, the microcomputer 13 proceeds from step 100 to step 110.
, And from the first memory 14 of the sketch image shown in FIG.
The size, that is, the address indicating the area size of the sketch image is read, and the process proceeds to step 120, where the first memory 1
4 to R, G, B of each address of the sketch image shown in FIG.
Read the size of each color element. In step 130, it is determined whether or not there is an overlaid image that overlaps the underlay image from the underlay image data shown in FIG. 10 read from the first memory 14.
R, G, B that read the point at that address at 40
Is displayed in a color determined by the size of each color element, and the process returns to step 110.

On the other hand, if it is determined in step 130 that there is a top picture, the flow advances to step 150 to store image data corresponding to the top picture in the second memory 15 to the seventh memory.
It is read from the memory 20 and set, and
Return to 0. By repeating the above operation, FIG.
Create the image shown in.

[0012]

However, for example, when developing an electronic meter using a liquid crystal display panel or the like, usually, a draft image is created in common with various types of vehicles, and an overlay image is created. Since the selection is performed according to the vehicle type, the first warning display 8 overlaps with the engine speed display 4 and the vehicle speed display 5 which are sketch images, and the lower portions of the engine speed display 4 and the vehicle speed display 5 are not visible. The engine speed display 4 and the vehicle speed display 5 do not
It is necessary to secure an extra space underneath, and the vertical dimension of the liquid crystal display panel 2 may be lengthened.

If the vertical dimension of the liquid crystal display panel 2 cannot be made long, the vertical dimension of the first warning display 8 may be reduced, or the first warning display 8 may be replaced with the engine speed display 4 or 4. The liquid crystal display panel 2 must be arranged on the side of the vehicle speed display 5, and in this case, the size of the liquid crystal display panel 2 in the horizontal direction may be long.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has as its object to perform watermark display so that a draft can be seen even if the draft overlaps the overprint.

[0015]

According to a first aspect of the present invention, there is provided an image display method for displaying an overlaid image on top of an underlaid image, wherein the overlaid image and the overlaid image are both overlapped. Each of the color elements RGB constituting the pixel data is shifted by one bit and then synthesized so that the underpainting image can be seen through the overpainting image.

According to a second aspect of the present invention, there is provided a first memory for storing pixel data of a base image in a plurality of bits for each color element of RGB, and storing pixel data of a top image in a plurality of bits for each color element of RGB. A second memory that performs
An image display device comprising: display control means for reading pixel data from each of a memory and a second memory; and synthesizing the underpainting image and the overpainting image, and displaying a combined image output from the display control means on a display. In the above, after the display control means lowers each RGB color component of the image data stored in the second memory and the respective RGB color components of the image data stored in the first memory in a portion where the image data overlaps, This is to create and display the entire composite image.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. Embodiment 1 FIG. First, an image display device of this type will be described below with reference to a vehicle electronic meter shown in FIGS. 1 and 2 as an example. In FIGS. 1 and 2, those already described with reference to FIGS. 7 and 8 and those equivalent thereto are denoted by the same reference numerals, and detailed description thereof will be omitted.

That is, the first memory 14 to the seventh memory 20 in the electronic meter 1 shown in FIG. 2 are given as stored image data in the form of a combination of R, G, B intensities (numerical values). ing. Then, symbols C, E, G, I, and C in the image data shown in the background portion of the overprint, for example, FIG. 11, FIG. 12, FIG. 13, FIG. 14, FIG.
This is the same as the conventional method in that the background part indicated by K and M is replaced with the image data of the sketch image (shown in FIG. 10) at the position corresponding to the background part and the display is performed.

On the other hand, all or part of the warning display images (first warning display) shown in FIG. 14 are displayed such that the underlay image shown in FIG. The size is larger than the size and is displayed in an easily viewable manner, and is shown in FIG. In this embodiment, as an example, an image in the case of performing an engine oil temperature alarm is displayed so as to be superimposed on a vehicle speed display portion on the display surface of the liquid crystal display panel 2. Other alarms such as the exhaust temperature alarm, the water temperature alarm, the intake abnormality alarm, and the fuel injection abnormality alarm described above.
The position of the display is not limited to the vehicle speed display portion, but may be another desired location.

Next, a method of creating a watermark image among the display images shown in FIG. 2 will be described below. In order to explain the creation of the watermark image, the display area detecting means 33, the first data shift means 34, and the watermark area image data detecting means 35 shown in FIG. , The second data shifting means 36, the first image synthesizing means 37, and the second image synthesizing means 38 are partially extracted.

That is, in FIG. 3, the upper picture image data memory 31 (corresponding to the fifth memory 22 in FIG. 1) stores the first picture data.
Engine oil temperature alarm display which is a warning display of
Exhaust temperature alarm display, water temperature alarm display, intake abnormality alarm display,
Image data such as a fuel injection abnormality alarm display is stored. The image data is color image data composed of R, G, and B color elements, and each of the image data is in accordance with an instruction from the microcomputer 21. One of the alarm displays is selected. In this case, the engine oil temperature alarm display is selected.

When the engine oil temperature alarm display is selected, the image data relating to the engine oil temperature alarm display output from the overhang image data memory 31 is converted to the first image data.
The data is supplied to the data shift means 34. The image data supplied to the first data shift means 34, that is, R, G, B
(For example, as shown in FIG. 4, each of the 5 bits indicates the color intensity), the bit components are shifted by one digit.

That is, as shown in FIG.
After each of the R, G, B color elements consisting of bits is read into a 15-bit shift register, one bit of the least significant digit of the color element B is discarded by being shifted so that the whole becomes smaller by one bit. (See FIG. 4B), then
Largest digit of color element R, G, B (indicated by L in FIG. 4)
Is masked. As a result, the size of each of the R, G, and B color elements of the image data output from the first data shift unit 34 is reduced by half, and the first image combining unit 3
7 is supplied.

On the other hand, when the engine oil temperature alarm display is selected, the upper picture image data memory 31 is displayed.
Display area detecting means 33 detects a pasting address indicating in which display area of the draft image the image related to the engine oil temperature warning is to be pasted based on the image data related to the engine oil temperature warning displayed from Then, it is supplied to the watermark area image data detecting means 35.

The watermark area image data detecting means 35
From the sketch image data supplied from the sketch image data memory 32, the image data of the portion corresponding to the sticking address supplied from the display area detecting means 33 is extracted and supplied to the second data shift means 36, Second
The first data shift means 34
In the same manner as described above, the minimum digit is discarded for each of the R, G, and B color elements, and the size of each of the R, G, and B color elements is reduced to １ ／, and is supplied to the first image synthesizing means 37. .

The watermark area image data detecting means 35 includes a part of the image data corresponding to the paste address supplied from the display area detecting means 33 out of the preliminary image data supplied from the preliminary image data memory 32. Is supplied to the second image synthesizing means 38 described later.

The first image synthesizing means 37 adds the image data supplied from each of the first and second data shift means 34 and 36 for each of the color elements R, G and B to form a new color element. Is obtained for each of R, G, and B, and is supplied to the second image synthesizing means 38.

In the second image synthesizing means 38, the image data supplied from the watermark area image data detecting means 35, that is, the image data remaining after extracting the upper picture image data from the lower picture image data memory 32, A new synthesized image synthesized by the first image synthesizing means 37, for example, the image shown in FIG. 6 is pasted on the extracted portion and synthesized to obtain a watermark picture image shown in FIG.

As a result, the color of the pictogram portion of the image shown in FIG. 6 is 1/2 of the sum of the hue of the background portion A of the display image data shown in FIG. 5 and the tint of the pictogram portion B shown in FIG. The color is displayed.

[0030]

According to the first aspect of the present invention, it is possible to obtain an effect that the underpainting image can be seen through the overpainting image and the whole image can be easily captured by a simple method.

According to the second aspect of the present invention, the effect that the sketch image can be seen through the sketch image and the whole image can be easily captured with a simple device is exhibited.

[Brief description of the drawings]

FIG. 1 is a circuit block diagram showing a first embodiment according to the present invention.

FIG. 2 is an explanatory diagram of a display surface of the liquid crystal display 2 displayed by the circuit shown in FIG. 1 according to the present invention.

FIG. 3 is an explanatory diagram of a circuit block for explaining a main part of the present invention.

FIG. 4 shows R, G, and B of image data in the circuit description of FIG. 3;
FIG. 9 is an explanatory diagram for explaining that when the data of the color element is shifted by 1 bit, the size of each becomes 1/2.

FIG. 5 is an explanatory diagram of the display surface of the liquid crystal display 2 in a state where the first alarm display is not performed.

FIG. 6 is an explanatory diagram of an overhang image pasted on the display image shown in FIG. 5 in a watermark state.

FIG. 7 is an explanatory diagram of a conventional circuit block.

8 is an explanatory diagram of a display surface of the conventional liquid crystal display 2 displayed by the circuit according to FIG. 7;

FIG. 9 is an explanatory diagram of a flowchart of the microcomputer 13 in FIG. 7;

10 is an explanatory diagram of a sketch image stored in a first memory 14. FIG.

FIG. 11 is an explanatory diagram of a gear position display of an overhead image stored in a second memory 15;

FIG. 12 is an explanatory diagram of a display of a traveling distance of an overhead image stored in a third memory 16;

FIG. 13 is an explanatory diagram of a direction conversion display of an overhang image stored in a fourth memory 17;

FIG. 14 is a diagram illustrating a first example of an overhang image stored in a fifth memory 18;
FIG. 4 is an explanatory diagram of a warning display of FIG.

FIG. 15A is an explanatory diagram of a fuel remaining amount display of an overpainting image stored in a sixth memory 19; (B) is an explanatory diagram of the engine temperature display of the overprint image stored in the sixth memory 19.

16 (A) and (B) are explanatory diagrams of a second warning display of an overhang image stored in the seventh memory 20. FIG.

[Explanation of symbols]

Reference Signs List 1 electronic meter 2 liquid crystal display panel 3 gear position display 4 engine speed display 5 vehicle speed display 6 mileage display 7 direction conversion display 8,11,12 warning display 9 engine temperature display 10 fuel remaining amount display 13,21 microcomputer 14, 15, 16, 17, 18, 19, 20, 22 memory 31 upper picture image data memory 32 lower picture image data memory 33 display area detecting means 34, 36 data shifting means 35 watermark area image data detecting means 37, 38 image synthesizing means

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 5B057 AA11 CA01 CA16 CB01 CB16 CD02 CE08 CE20 5C082 AA00 AA11 BA12 BA34 BB15 BB42 CA56 DA51 DA86 MM04 MM10 5C094 AA01 AA45 BA07 BA43 CA18 CA24 DA03 HA05 5G435 BB12 BB13 BB12 BB12 DD

Claims (2)

[Claims] 1. An image display method for displaying an upper picture on an upper side of a lower picture by shifting one bit of each of color elements RGB constituting pixel data of a portion where the lower picture and the upper picture overlap each other. And synthesizing the underpainting image so that the underpainting image can be seen through the overpainting image. 2. A first memory for storing pixel data of an underpainting image in a plurality of bits for each of RGB color elements, a second memory for storing pixel data of an underpainting image in a plurality of bits for each of RGB color elements, and An image display device comprising: display control means for reading pixel data from each of the first and second memories and synthesizing the underpainting image and the overpainting image, and displaying a combined image output from the display control means on a display In the above, after the display control means lowers the respective RGB color components of the image data stored in the second memory and the image data stored in the first memory in a portion where the image data overlaps by one bit, An image display device for creating and displaying an entire composite image.