JPH03282585A - Screen synthesizer - Google Patents

Abstract

PURPOSE:To color and display synthesized screen information in a position range on a screen based upon position data by composing the synthesized screen information with digital R(red), G(green), and B(blue) signals selected with the position data. CONSTITUTION:The R, G, and B signals from a personal computer 1 are converted into 8-bit parallel signals by S/P converting circuits 10, 20, and 30. At the same time, the synthesized screen information (8 bits) corresponding to the same field positions of the R, G, and B signals is outputted from a synthe sized screen memory 6 with the control signal from a control part 6 and the position data (1 bit) is outputted from a synthesized screen position information memory 5. The 8-bit parallel signals of the R, G, and B signals and 8-bit parallel synthesized screen, information are selected by selector circuits 11, 21, and 31. This selection control is based upon the position data (1 bit). The selected 8-bit data are outputted by P/S converting circuits 12, 22, and 32 as serial selected R, G, and B signals, which are displayed on the screen of a display device 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a screen composition device used in a personal computer.

[Conventional technology]

Conventionally, this type of screen compositing apparatus has been configured to synthesize white characters with information from a personal computer using analog RGB signals.

[Problem to be solved by the invention]

The conventional screen compositing device described above is configured to superimpose white characters on the screen using analog RGB signals based on information from a personal computer, so the color and background of the characters cannot be set arbitrarily, and the window display on the screen cannot be adjusted. The disadvantage is that white may not be suitable.

[Means to solve the problem]

A screen synthesis device of the present invention is a screen synthesis device that causes a display device to synthesize synthesis information with information from a personal computer and display the result, and includes a synthesis screen storage section in which synthesis screen information is stored in advance, and a synthesis screen storage section in which synthesis screen information is stored in advance; a composite screen position information storage section in which position data on the display screen of the display device is stored in advance; and a digital red (R) signal, green (G) signal and blue (B) signal from the personal computer.
) Each signal is a parallel red (R) signal.

three serial-to-parallel conversion circuits that convert into green (G) signals and blue (B) signals; and parallel signals from each of the three serial-to-parallel conversion circuits or a parallel composite information signal from the composite screen storage unit. three selector circuits that select the desired position based on the position data from the composite screen position information storage section; and three selector circuits that convert the output parallel signals of the three selector circuits into serial signals and send the serial signals to the display device. parallel-serial conversion circuit,
and a control section that controls each output control of the composite screen storage section and the composite screen 1 information storage section using a control signal from the personal computer.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention.

In FIG. 1, the screen compositing device of this embodiment which combines information from a personal computer 1 with composite information on a display device 2 and displays the result is a synchronization signal generation circuit that generates horizontal and vertical synchronization signals for the display device 2. 3, a composite screen memory 4 in which composite information is stored in advance, a composite screen position information memory 5 in which position data on the display screen of the composite information display device 2 is stored in advance, and a digital display from the personal computer 1. Three serial-to-parallel conversion circuits that convert the red (R), green (G), and blue (B) signals of the (hereinafter referred to as S/P conversion circuit)10
．． 20.30 and three S/P conversion circuits 10.20.3
three selector circuits 11, 21, and 31 for selecting either the parallel signal from each of 0 or the parallel composite information signal from the composite screen memory 4 according to the position data from the composite screen position information memory 5; circuit 11
．． 21.31 Three parallel-to-serial conversion circuits (hereinafter referred to as P/S conversion circuits) 12, 2 that convert the parallel signals of their respective outputs into serial signals and send them to the display device 2.
2.32, and a control section 6 that controls each output of the composite screen memory 4 and the composite screen position information memory 5 using control signals from the personal computer 1.

Next, the operation of this embodiment will be explained.

The R signal, G signal, and B signal from the personal computer 1 are each converted to 8 by the S/P conversion circuit 10°20.30.
It is converted into a bit parallel signal. At the same time, the control unit 6
Synthetic screen information (8 bits) corresponding to the same field position of each R, G, and B signal is output from the synthetic screen memory 4 by a control signal from
t) is output from the composite screen position information memory 5.

The parallel signals of each 8-bit R, G, and B signal and the 8-bit parallel composite screen information are the selector circuit 1.
1, 21. Selected at 31. This selection control is based on position data (lbit). That is, when the position data is logical ``1'', the composite screen information is selected, and when the position data is logical ``0'', the R, G, and B signals from the personal computer 1 are selected.

The 8 bits of data selected in this way are each P
The /S conversion circuits 12, 22, and 32 output the serially selected R, G, and B signals again and display them on the screen of the display device 2.

As the display device 2, a CRT is generally used by inputting R, G, and B signals.

By converting each B signal, it is also effective for LCDs and plasma displays.

〔Effect of the invention〕

As explained above, the present invention combines the composite screen information stored in the composite screen storage section with the digital R, G, and B signals selected based on the position data stored in the composite screen position information storage section. This has the effect that the composite screen information in the composite screen storage section can be displayed in color in a position range on the screen of the display device.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention. 1...Personal computer, 2...Display device,
3... Synchronization signal generation circuit, 4... Composite screen memory,
5... Composite screen position information memory, 6... Control unit, 1
020.30...Serial parallel conversion circuit (S/P
Conversion circuit)...Selector circuit, 2゜2...Parallel-serial conversion circuit (P/S conversion circuit)

Claims (1)

[Claims] In a screen compositing device that combines information from a personal computer with composite information for display on a display device, the composite screen storage unit stores composite screen information in advance, and the composite screen information is displayed on a display screen of the display device. A composite screen position information storage unit in which position data is stored in advance, and a parallel red (R) signal, which converts each of the digital red (R) signal, green (G) signal, and blue (B) signal from the personal computer into parallel red (R) signals; three serial-to-parallel conversion circuits that convert into green (G) signals and blue (B) signals; and parallel signals from each of the three serial-to-parallel conversion circuits or a parallel composite information signal from the composite screen storage unit. three selector circuits that select the desired position based on the position data from the composite screen position information storage section; and three selector circuits that convert the output parallel signals of the three selector circuits into serial signals and send the serial signals to the display device. 1. A screen composition device comprising: a parallel-to-serial conversion circuit; and a control section that controls each output of the composite screen storage section and the composite screen position information storage section using a control signal from the personal computer.