JPS615289A - Image processor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an image processing device having a plink function that changes the display colors of an image displayed in multiple colors using a raster scanning type image display device at regular intervals. It is related to.

[Prior art]

A conventional image processing apparatus of this type is shown in FIG. FIG. 1 is a block diagram showing a conventional image processing apparatus having a blink function.

Here, it has 7 frames memory for one frame, and 40 frames.
Display any 16 colors out of 96 colors at the same time, and
An example is given in which a two-phase plinking function can be performed using 32 colors, which are 16 additional colors (which may overlap with the previous 16 colors). In FIG. 1, reference numeral 1 denotes an address switcher 2a, which switches between the address of the central processing unit 11 (hereinafter abbreviated as CPU) and the address output when the frame memory 12 is refreshed; 2b is a look-up table circuit (hereinafter abbreviated as LUT) that outputs 12-bit color information in response to a 4-bit address input; 3a;
3b is CPU 1 and each LUT 2a.

2b data switcher, 4 each 2 LUT2
a.

2b is a data switch; 5 is each two LUTs 2a.

2b is a latch circuit that stores data; 13 is the CPU 11;
, frame memory 12. A control signal generation circuit for controlling the address switch 1 and each data switch 3a, 3b, 4, 14 an image processing device consisting of each of the above-mentioned components, 15
is a raster scanning type image display device.

Next, the operation of the conventional image processing apparatus having the link function shown in FIG. 1 will be explained. First, each of the two LUs
When writing data to T2a and 2b, CPU1
Address 6 and data 8 are sent from 1, and the address switch 1 and each data switch 3a, 3b are switched by the control signal 10 from the control signal generation circuit 13, and these addresses and data are 2 each LUT2a
, 2b. Here, such a switching operation is performed only when writing to each of the two LUTs 2a and 2b, and normally, the 4-bit output of the frame and memory 12 is changed to the address of each of the two LUTs 2a and 2b. Each 12-bit data read from the input is
The signal is input to the data switch 4 through each data switch 3a, 3b. This data switcher 4 is controlled by a control signal 9 from a control signal generation circuit 13 that realizes a blink function, and is configured to alternately output output data of the two LUTs 2a and 2b according to the blink cycle. The data output from the data switch 4 is stored in the latch circuit 5 and then sent to the image display device 15.

A conventional image processing device with a blink function is configured as described above, so in order to perform the blink function,
Two LUTs 2a and 2b are required, and therefore,
The disadvantage is that the hardware of the image processing device becomes very complex.

[Summary of the invention]

This invention was made for the purpose of improving the drawbacks of the conventional ones as described above, and uses one LUT.
An image processing apparatus is provided in which the hardware of the apparatus can be simplified by configuring the apparatus to perform a blinking function by adding a control signal for blinking in addition to the address.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is a block diagram showing an image processing apparatus having a blink function, which is an embodiment of the present invention.

Here too, it has a frame memory for one frame, and 40
Display any 16 colors out of 96 colors at the same time, and
An example is given in which a two-phase blinking function can be performed using 32 colors, which are 16 additional colors (which may overlap with the previous 16 colors). In Fig. 2, 1 is an address switch that switches between the CPU II address and the address output when the frame memory 12 is refreshed, and 2 is a 12-bit color for a 4-bit address input. LUT using static RAM that outputs information; 4 is a data switcher that switches between data from LUT 2 and data from CPU II; 5 is a latch circuit that stores data output from LUT 2; 13 is cpU11t frame memory 1
2. Address switch 1. A control signal generation circuit controls the LUT 2 and the data switch 4; 14 is an image processing device comprising the above components; and 15 is a raster scanning type image display device.

Next, the operation of the image processing apparatus having a blink function, which is an embodiment of the present invention shown in FIG. 2, will be explained.

First, when writing data to LUT2, the CPU
Address 6 and data 8 are sent from I, address switch 1 and data switch 4 are switched by control signal 10 from control signal generation circuit 13, and these addresses and data are input to LUT 2. . Here, such a switching operation is performed only when writing to LUT2; normally, the 4-bit output of frame memory 12 is not the address input of LUT2, and the 12-bit output read from there is The data passes through the data switch 4 and is stored in the latch circuit 5. In the above circuit configuration, if the control signal 9 with a blink period from the control signal generation circuit 13 is added to one of the unused address input lines of LUT2, two of the entry packets of LUT2
The colors will be output alternately. For example, if you always input an I Hz signal as the control signal 9 for plinking and write red and blue color information to the entry addresses corresponding to the change, red and blue will change in 0.5 seconds. are displayed alternately. Also, if the same color information is written to these entry addresses, the state will be such that they will not be linked.

Note that in the above embodiment, a case has been described in which a frame memory for one frame is provided and any 16 colors out of 4096 colors are simultaneously displayed. Color (N.

The same is true even if both M are natural numbers). Furthermore, when performing two or more blink functions, the capacity of the static RAM used in LUT 2 may be increased and a control signal corresponding to the number of blink phases may be input as an address.

〔Effect of the invention〕

As explained above, the present invention uses one LUT in an image processing device having a blink function, and adds a control signal for blink in addition to the address as an address input to this LUT to perform the blink function. This has the advantage that the hardware of the apparatus can be extremely simplified compared to conventional image processing apparatuses of this type.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a conventional image processing apparatus having a blink function, and FIG. 2 is a block diagram showing an image processing apparatus having a blink function according to an embodiment of the present invention. In the figure, 1...address switch, 2, 2a. 2b...Lookup table circuit (LUT), 3a
. 3b, 4...Data switcher, 5...Latch circuit, 6...Address, 7...-output, 8...Data,
9.10... Control signal, 11... Central processing unit (CPU), 12... Frame memory, 13... Control signal generation circuit, 14... Image, processing device, 15...
・Image display device. In each figure, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] An image processing device that displays an image using a raster scanning type image display device, comprising one lookup table circuit and a circuit that realizes a blinking function that changes the display color of the image at a constant cycle. An image processing device characterized by comprising: