JP4467279B2 - On-screen display device - Google Patents

Description

  The present invention relates to an on-screen display device that displays characters and the like on a screen.

  Conventionally, an on-screen display device that displays characters such as characters on a monitor screen such as a television has been proposed (see, for example, Patent Document 1). Hereinafter, a conventional general on-screen display device will be described with reference to FIG. FIG. 7 is a block diagram showing a configuration of a conventional on-screen display device.

  In FIG. 7, the display position output circuit 701 includes a horizontal position and a vertical position on the monitor screen based on a vertical synchronization signal (VSYNC) 702, a horizontal synchronization signal (HSYNC) 703, and a display dot clock (CLOCK) 704. And the horizontal display position information 705 indicating the display position on the screen and the vertical display position information 706 are output.

  The display code memory address generation circuit 707 includes horizontal display position information 705, vertical display position information 706, a character switching signal 722 output from the character width match detection circuit 721, and a horizontal display output from the horizontal display position match detection circuit 723. Based on the start position signal 724, an address 708 of the display code memory 709 is generated.

  In the display code memory 709, display codes such as characters to be displayed on the screen are stored in advance for each address corresponding to the display position on the screen, and the display code memory address generation circuit 707 corresponds to the address 708 output. A display character code 710, a display character width code 711, and a horizontal display start position code 712 are output.

  The font data memory address generation circuit 713 generates an address 714 of the font data memory 715 based on the display code 710 output from the display code memory 709 and the vertical display position information 706 output from the display position output circuit 701.

  The font data memory 715 stores font data and outputs font data 716 corresponding to the address 714 output from the font data memory address generation circuit 713.

  The character width counter 717 is a binary counter that counts the display dot clock 704, and outputs a character width count value 718 that is a count result of the display dot clock 704. The binary counter resets the count result by a horizontal display start position signal 724 output from the horizontal display position match detection circuit 723 or a character switching signal 722 output from the character width match detection circuit 721.

The character width code conversion circuit 719 outputs character width data 720 corresponding to the display character width code 711 output from the display code memory 709.
The character width match detection circuit 721 compares the character width count value 718 output from the character width counter 717 with the character width data 720 output from the character width code conversion circuit 719, and outputs a character switching signal 722 when they match. To do.

  The horizontal display position coincidence detection circuit 723 compares the horizontal display position information 705 output from the display position output circuit 701 with the horizontal display start position code 712 output from the display code memory 709. The signal 724 was output.

  The on-screen display output unit 729 superimposes and outputs the RGB signal 728 corresponding to the font data from the font data memory 715 on the video signal.

  Hereinafter, the on-screen display output unit 729 will be described in detail. The serial conversion circuit 725 in the on-screen display output unit 729 is a shift register, reads font data 716 when a character switching signal 722 is input, and reads the read data as serial data 726 at the cycle of the display dot clock 704. Output. The serial data 726 is data that is at a high level when it is a character area of a font, and is at a low level when it is an area other than that (font background area).

  The color table 727 in the on-screen display output unit 729 receives the serial data 726, outputs a RGB character signal 728 of a preset character color when the serial data 726 is high level, and is preset when the input is low level. The RGB signal 728 of the background color thus output is output. Note that, by setting the background color to be a transparent color, a predetermined character or the like can be displayed on-screen on a television image or the like as a background.

The operation of the on-screen display device configured as described above will be described.
First, output of the horizontal display position information 705 and the vertical display position information 706 by the display position output circuit 701 will be described. The display position output circuit 701 receives the vertical synchronization signal 702, the horizontal synchronization signal 703, and the display dot clock 704, and receives horizontal display position information 705 and vertical display position information indicating the dot position of the on-screen display on the screen. 706 is output. The horizontal display position information 705 and the vertical display position information 706 are expressed as, for example, m dots on the right and n dots on the bottom (m and n are integers of 1 or more) with the upper left of the screen as a reference. In this case, m is horizontal display position information 705, and n is vertical display position information 706. M indicating the position in the horizontal direction is incremented by 1 each time the display dot clock 704 is counted, and is reset to 1 each time the horizontal synchronization signal 703 is detected. N indicating the position in the vertical direction indicates that the display position is lowered by one line in the horizontal direction when the horizontal synchronization signal 703 is detected. For this reason, for example, when 3 lines correspond to 1 dot of on-screen display, n indicating the vertical position is incremented by 1 every time the horizontal synchronization signal 703 is detected three times. Each time the vertical synchronization signal 702 is detected, the display dot position returns to the upper end of the screen, so n is returned to 1.

Next, the output of the character switching signal 722 by the character width coincidence detection circuit 721 will be described. The character width match detection circuit 721 receives the character width count value 718 output from the character width counter 717 and the character width data 720 output from the character width code conversion circuit 719, and outputs a character switching signal 722.
The character width counter 717 counts the display dot clock 704 and outputs a character width count value 718 to the character width match detection circuit 721.

  The character width code conversion circuit 719 converts the display character width code 711 for each display character set in the display code memory 709 into the corresponding number of character width dots, and outputs it as character width data 720. For example, when 4 dots, 8 dots, 12 dots, and 16 dots are selected as the types of character width dots, four codes 00, 01, 10, and 11 of binary numbers are used as the display character width codes 711. The character width dot numbers 4, 8, 12, and 16 corresponding to the respective codes are output as the character width data 720 to the character width match detection circuit 721.

  The character width match detection circuit 721 outputs a character switch signal 722 when the value of the character width data 720 matches the character width count value 718. Here, since the character width counter 717 resets the count value with the character switching signal 722, the character switching signal 722 output from the character width matching detection circuit 721 is output for each number of dots indicated by the character width data 720. Will be.

  Next, output of the horizontal display start position signal 724 by the horizontal display position coincidence detection circuit 723 will be described. The horizontal display position coincidence detection circuit 723 receives the horizontal display start position code 712 output from the display code memory 709 and the horizontal display position information 705 output from the display position output circuit 701, and outputs a horizontal display start position signal 724. To do.

The display code memory 709 stores a horizontal display position code included in one display line for each display row among the stored display codes and outputs it as a horizontal display start position code 712 within the horizontal display period.
The horizontal display position match detection circuit 723 outputs a horizontal display start position signal 724 when the horizontal display position information 705 and the horizontal display start position code 712 match.

  Next, operations from generation of display code addresses to output of RGB signals will be described. First, when the display code memory address generation circuit 707 detects from the horizontal display position information 705 that the display dot position in the horizontal direction has returned to the left end, that is, m = 1, the address 708 is set at that time. Returns to the first address of the on-screen character line. The horizontal display start position code of the line is stored at the first address of the character line, and this code is held within the horizontal display period and output as the horizontal display start position code 712. Thereafter, when the character switching signal 722 is input, the address 708 is incremented by one. As a result, one character to be displayed is switched. For example, when the characters “AWB012” are displayed in one line, the display code address generation circuit 707 outputs an address 708 corresponding to the horizontal display start position code 712 when m = 1. Then, when the character switching signal 722 is input, the address is incremented to the address corresponding to the leftmost “A”. When m = 1, if the vertical display position information 706 is a value indicating the character string of the next line, the output address 708 is an address corresponding to the leftmost code of the line. And For example, when the height of one character is 18 dots and the space between lines is 2 dots, the display code memory address generation circuit 707 determines that the character to be displayed on-screen is the next line. Judge that it became.

  Next, the display code memory 709 outputs a display code 710 corresponding to the address 708 to the font data memory address generation circuit 713. The display character width code 711 corresponding to the address 708 is output to the character width code conversion circuit 719. If the code corresponding to the address 708 is a horizontal display position start code, the horizontal display start position code 712 is output to the horizontal display position match detection circuit 723. Here, in order to identify the horizontal display start position code, each code stored in the display code memory 709 is added with a bit indicating the type of code, and this bit is recognized as the horizontal display start position code. Is output as the horizontal display start position code 712.

  A font data memory address generation circuit 713 is a font data memory that stores an address 714 of font data corresponding to a line position of a predetermined dot from the character indicated by the display character code 710 and indicated by the vertical display position information 706. Output to 715. For example, when the character indicated by the display character code 710 is “A” and the display dot position indicated by the vertical display position information 706 is the third dot from the top of the “A”, the character from the top of the “A” is 3 The font data address 714 corresponding to the line position of the dot is output.

  Next, the font data memory 715 outputs font data 716 corresponding to the address 714. In the case of the above example, the font data 716 at the line position of the third dot from the top of the font “A” is output to the serial conversion circuit 725.

  Next, the serial conversion circuit 725 reads the font data 716 from the font data memory 715 collectively into the shift register when the character switching signal 722 is input, and the data is read every time the display dot clock 704 is input. Shift and output. As a result, the font data can be output to the color table 727 as serial data 726 one dot at a time.

  The color table 727 outputs an RGB signal 728 of a preset character color for the dots constituting a part of the font, and outputs the RGB signal 728 of the background color for the other dots. Output.

In this way, the conventional on-screen display device performs on-screen display on a screen such as a monitor.
Japanese Patent Laying-Open No. 2003-208148 (FIG. 4)

  However, in the above-described conventional on-screen display device, since the character width displayed on the screen is not constant, the display area of each display line is not constant, and the end of the display line is uneven for each line.

  That is, as shown in the character display example of FIG. 14, even if the display heads (horizontal display start position 1401) are aligned for each display line and the same number of characters are displayed, the line end positions (1402 to 1404) Are disjoint and irregular for each display line. In order to avoid this, it was necessary to add a space character at the end of a line with a short line length to make the length of all lines uniform. Because of this, when setting the display character code, it is necessary to set the required number of white space character codes in consideration of the line length, and the storage area of the display code memory is compressed to add white space characters. The problem of doing was caused.

  The present invention solves the above-mentioned conventional problems, and when the character width to be displayed on-screen is not constant for each line, a blank character is additionally set according to the length (number of dots) of the character area of the display line. An object of the present invention is to provide an on-screen display device capable of aligning the end of a line at an arbitrary position without the need.

  An on-screen display device according to claim 1 of the present invention includes a display position output means for outputting display position information indicating a display position on a screen based on a vertical synchronization signal, a horizontal synchronization signal, and a display dot clock, and a screen Display code storage means for storing, for each address corresponding to a display position on the screen, a display code of a character to be displayed above and a character width code set corresponding to the character indicated by the display code; Display code address generating means for generating an address of the display code storage means based on display position information and a character switching signal indicating timing for switching characters to be displayed on the screen, and font data storage means for storing font data And a display code corresponding to the address generated by the display code address generating means is the display code storage means. Receiving the display code and the display position information to generate an address of the font data storage means, and a character width code corresponding to the address generated by the display code address generating means. A character switching signal generating means for generating the character switching signal based on the character width information code and the display dot clock, and a line background display start horizontal that is a background frame of a line for displaying characters; Line background horizontal position storage means for storing line background start horizontal position information indicating the position and line background end horizontal position information indicating the display end horizontal position of the line background; and the line background received from the line background horizontal position storage means Start horizontal position information and line background end horizontal position information, and the display position received from the display position output means Line background range signal generating means for generating a line background range signal indicating a range for displaying a line background from the information, font data corresponding to the address generated by the font data address generating means, or the line background range signal Corresponding to the line background range signal generated by the generating means, an on-screen display output means for outputting a preset character color signal or a preset line background color signal superimposed on the video signal And.

  According to a second aspect of the present invention, there is provided an on-screen display device comprising: a display position output means for outputting display position information indicating a display position on a screen based on a vertical synchronization signal, a horizontal synchronization signal, and a display dot clock; The display code of the character displayed above and the character width code set corresponding to the character indicated by the display code are stored for each address corresponding to the display position on the screen, and the character display line Display code storage means for storing, for each display line, a line background start horizontal position code indicating the display start horizontal position of the line background and a line background end horizontal position code indicating the display end horizontal position of the line background, and the display position information And a display code for generating an address of the display code storage means based on a character switching signal indicating a timing for switching a character displayed on the screen. Address generation means, font data storage means for storing font data, and a display code corresponding to the address generated by the display code address generation means are received from the display code storage means, and the display code and the display position information A font data address generating means for generating an address of the font data storage means based on the character width code corresponding to the address generated by the display code address generating means from the display code storage means, and the character width code and the Character switching signal generating means for generating the character switching signal based on a display dot clock, line background start horizontal position code and line background end horizontal position code received from the display code storage means, and display position output means Based on the received display position information, the line background A line background range signal generating means for generating a line background range signal indicating a range to be displayed; font data corresponding to an address generated by the font data address generating means; or a line background generated by the line background range signal generating means Corresponding to the range signal, there is provided an on-screen display output means for superimposing and outputting a color signal of a preset character color or a color signal of a preset line background color on a video signal It is characterized by.

  The on-screen display device according to claim 3 of the present invention is the on-screen display device according to claim 2, wherein the display code storage means further displays a row background color code indicating the color of the row background for each display row. The on-screen display output means in advance corresponding to the font data corresponding to the address generated by the font data address generation means or the line background range signal generated by the line background range signal generation means. The color signal of the set character color or the color signal of the line background color indicated by the line background color code received from the display code storage means is superimposed on the video signal and output.

  The on-screen display device according to claim 4 of the present invention is the on-screen display device according to claim 2, wherein the display code storage means includes the row background start horizontal position code, the row background end horizontal position code, and the Two or more sets of row background color codes are stored for each display row, and the row background range signal generation means receives two or more sets of the row background start horizontal position codes and the row background end received from the row background horizontal position storage means. From the horizontal position code and the display position information received from the display position output means, two or more line background range signals indicating the range in which the line background is displayed are generated, and the on-screen display output means is the font data Font data corresponding to the address generated by the address generating means, or generated by the row background range signal generating means A row indicated by either a color signal of a preset character color or two or more row background color codes received from the display code storage means in correspondence with two or more row background range signals. A background color signal is output by being superimposed on a video signal.

  The on-screen display device according to a fifth aspect of the present invention is the on-screen display device according to the second aspect, wherein the display code storage means is further provided on any one of the four sides around the row background. A first line background shadow designation code indicating whether to add a shadow is stored for each display line, display position information received from the display position output means, and a line background range signal received from the line background range signal generating means, Based on the line background color information and the first line background shadow designation code received from the display code storage means, the line background color designation signal for designating the line background color or the colors of the four sides around the line background are obtained. A line background shadow color designation signal generating means for generating a line background shadow color designation signal to be designated as a line background shadow color, and the on-screen display output means comprises the font data add Font data corresponding to the address generated by the text generation means, or a color signal of a preset character color corresponding to the line background range signal generated by the line background range signal generation means, and the line background color designation signal The line background color signal designated by the line background or the line background shadow color signal designated by the line background shadow color designation signal is superimposed on the video signal and output.

  The on-screen display device according to a sixth aspect of the present invention is the on-screen display device according to the fifth aspect, wherein the display code storage means further adds a shadow to a line background consisting of a single line or from a plurality of lines. A second row background shadow designation code indicating whether or not to add a shadow to the row background, and the row background shadow color designation signal generating means includes the display position information received from the display position output means, and the row background range. Based on the line background range signal received from the signal generating means and the line background color code, the first line background shadow designation code and the second line background shadow designation code received from the display code storage means A line background color designation signal for designating a line background, or a line background designating the color of the four sides around the line background consisting of a single line or the color of the four sides around the line background consisting of multiple lines as the row background shadow color Characterized by generating a shadow color designation signal.

  According to the on-screen display device of the present invention, the display start horizontal position and display end horizontal position of the line background, which is the background frame of the line displaying characters, and the line background color are set, and the line background is displayed on the screen. Since the background is displayed, the background frame of the set range can be displayed without adjusting the length of the display area by adjusting the number of characters and the character width of each display line, making it easy to set the display layout. The effect of becoming is obtained.

  Further, according to the on-screen display device according to the present invention, the display start horizontal position and the display end horizontal position of the line background, which is the background frame of the line displaying the character, the color of the line background, the shadow to be added to the line background By setting, the row background can be displayed three-dimensionally and a flexible display layout can be set.

  Further, according to the on-screen display device according to the present invention, it is not necessary to add an extra space behind the character string in order to make the length of the display area of each display line. The effect of not having to press the capacity is obtained.

Embodiments of the present invention will be described below with reference to the drawings.
(Embodiment 1)
FIG. 1 is a block diagram showing a configuration of an on-screen display device according to Embodiment 1 of the present invention. In FIG. 1, the same components as those in FIG. The on-screen display device according to the first embodiment is different from the conventional on-screen display device shown in FIG. 7 in that a row background start horizontal position storage circuit 129, a row background end horizontal position storage circuit 132, and a row background start horizontal position. It further includes a coincidence detection circuit 133, a row background end horizontal position coincidence detection circuit 135, and a row background range signal generation circuit 137.

  The operation of the on-screen display device configured as described above will be described. The description of the operation of the same components as the on-screen display device shown in FIG. 7 is omitted.

  The row background start horizontal position storage circuit 129 stores row background start horizontal position information 130 indicating the display start horizontal position of the background frame (row background) displayed for each row on the screen. Then, the line background start horizontal position information 130 is output to the line background start horizontal position coincidence detection circuit 133.

  The line background start horizontal position coincidence detection circuit 133 compares the horizontal display position information 705 received from the display position output circuit 701 with the line background start horizontal position information 130 received from the line background start horizontal position storage circuit 129 to find a match. When this happens, the row background start horizontal position coincidence signal 134 is output.

  The line background end horizontal position storage circuit 132 stores line background end horizontal position information 131 indicating the display end horizontal position of the line background to be displayed on the screen. The row background end horizontal position information 131 is output to the row background end horizontal position coincidence detection circuit 135.

  The line background end horizontal position coincidence detection circuit 135 compares the horizontal display position information 705 received from the display position output circuit 701 with the line background end horizontal position information 131 received from the line background end horizontal position storage circuit 132, and matches. When this happens, the row background end horizontal position coincidence signal 136 is output.

  The line background range signal generation circuit 137 includes a line background start horizontal position coincidence signal 134 received from the line background start horizontal position coincidence detection circuit 133 and a line background end horizontal position coincidence signal received from the line background end horizontal position coincidence detection circuit 135. 136, the line background range designation signal 138 indicating the range from the line background start horizontal position to the line background end horizontal position is output to the on-screen display output unit 139.

  The on-screen display output unit 139 uses, as a video signal, a preset character color RGB signal or a preset row background color RGB signal corresponding to the font data 718 or the line background range signal 138. Superimpose and output.

  Details of the on-screen display output unit 139 will be described below. The color table 127 in the on-screen display output unit 139 converts the RGB signal 128 based on the serial data 726 received from the serial conversion circuit 725 and the row background range designation signal 138 received from the row background range signal generation circuit 137. Output. Here, the color table 127 outputs the RGB signal 128 of the character color set in advance for the dots constituting a part of the font, and the RGB signal of the row background color for the other dots. In the range where the line background range designation signal 138 output by the line background range signal generation circuit 137 is active, the line background set in advance is set for dots other than the dots constituting a part of the font. The color RGB signal 128 is output.

  By the operation as described above, for example, as shown in FIG. 8, a line background color set in advance in the range from the line background start horizontal position 805 to the line background end horizontal position 806 is displayed on the background of the character displayed on the screen. A background frame with can be displayed.

  As described above, the on-screen display device according to the first embodiment sets the line background display start horizontal position, the line background display end horizontal position, and the line background color, which are the background frames of lines displaying characters. The line background frame is displayed on the screen. Thus, a line background frame having a certain width can be displayed without adding a blank character in order to match the width of the character string of each display line.

(Embodiment 2)
FIG. 2 is a block diagram showing the configuration of the on-screen display device according to Embodiment 2 of the present invention. In FIG. 2, the same reference numerals are used for the same components as those in FIGS.
The on-screen display device according to the second embodiment is different from the conventional on-screen display device shown in FIG. 7 in that the row background start horizontal position coincidence detection circuit 133, the row background end horizontal position coincidence detection circuit 135, and the row background range. And a signal generation circuit 137.

  The operation of the on-screen display device configured as described above will be described. Description of the operation of the same components as those of the on-screen display device shown in FIGS. 1 and 7 is omitted.

  The display code memory address generation circuit 207 generates a code stored in the display code memory 209 based on the horizontal display position information 705, the vertical display position information 706, the character switching signal 722, and the horizontal display start position signal 724. A corresponding address 208 is generated.

  The display code memory 209 indicates the display start horizontal position of the line background in addition to the display character code to be displayed on the screen, the display character width code for each display character, and the horizontal display start position code for each display line. A code (line background start horizontal position code) and a code indicating a line background display end horizontal position (line background end horizontal position code) are stored. In the display code memory 209, a horizontal display start position code, a line background start horizontal position code, and a line background end horizontal position code are stored in order from the top address of each display line. A display character code and a display character width code are stored in succession.

  Here, when the display code memory address generation circuit 207 detects that the display dot position in the horizontal direction has returned to the left end (that is, m = 1) from the horizontal display position information 705, the display code memory address generation circuit 207 displays The code memory address 208 is returned to the first address of the character line currently displayed on the screen. The first address of the character line in the display code memory 209 stores the horizontal display start position code of the line, and the display code memory 209 holds the horizontal display start position code within the horizontal display period and performs horizontal display. The start position code 712 is output to the horizontal display position match detection circuit 723. Thereafter, the display code memory address generation circuit 207 increments the address 208 by one and outputs the address where the row background start horizontal position code of that row is stored. The display code memory 209 holds the row background start horizontal position code corresponding to the address within the horizontal display period, and outputs it to the row background start horizontal position coincidence detection circuit 133 as the row background start horizontal position information 230. Thereafter, the display code memory address generation circuit 207 increments the address 208 by one and outputs the address where the row background end horizontal position code of the row is stored, and the display code memory 209 displays the row corresponding to the address. The background end horizontal position code is held within the horizontal display period, and is output to the row background end horizontal position coincidence detection circuit 135 as row background end horizontal position information 231. Thereafter, each time the character switching signal 722 is input, the address 208 is incremented by one. As a result, the display code memory 209 outputs the display character code 710 and the display character width code 711 corresponding to the address, whereby one character to be displayed is switched.

  By the above operation, for example, as shown in FIG. 9, in the display from the first row to the third row, the row background start horizontal positions 905 to 907 and the row background end horizontal positions 908 to 910 are set to the left. In the display of the fourth and fifth lines, the row background start horizontal positions 914 to 915 and the line background end horizontal positions 916 to 917 can be set to the right, and the display position of the frame can be changed depending on the lines.

  As described above, the on-screen display device according to Embodiment 2 displays the code indicating the display start horizontal position of the line background and the code indicating the display end horizontal position of the line background for each display line. The range of the line background to be displayed on the screen is specified based on the horizontal position indicated by each code. As a result, the line background start horizontal position and the line background end horizontal position can be individually set for each display line, so that the display position of the background frame can be changed depending on the line, and a flexible display layout can be set.

(Embodiment 3)
FIG. 3 is a block diagram showing the configuration of the on-screen display device according to Embodiment 3 of the present invention. In FIG. 3, the same reference numerals are used for the same components as those in FIGS. 1, 2, and 7.
The on-screen display device according to the third embodiment is different from the on-screen display device according to the second embodiment only in the operations of the display code memory and the color table.

  Hereinafter, the operation of the on-screen display device according to the third embodiment will be described. The description of the operation of the same components as those of the on-screen display device shown in FIGS. 1, 2, and 7 is omitted.

  The display code memory 309 includes a display character code to be displayed on the screen, a display character width code for each display character, a horizontal display start position code for each display line, and a line background start horizontal position code for each display line. The line background end horizontal position code and the line background color designation code are stored. In the display code memory 309, a horizontal display start position code, a line background start horizontal position code, and a line background end horizontal position code are stored in order from the top address of each display line. A display character code and a display character width code are stored in succession.

  Here, the horizontal display start position code of the line is stored at the first address of the character line in the display code memory 309, and the display code memory 309 holds the horizontal display start position code within the horizontal display period. The horizontal display start position code 712 is output to the horizontal display position coincidence detection circuit 723. Thereafter, when the address 208 is incremented by 1, the display code memory 309 holds the row background start horizontal position code corresponding to the incremented address within the horizontal display period, and starts the row background as the row background start horizontal position information 230. Output to the horizontal coincidence detection circuit 133. In addition, a row background color designation code is embedded in the row background start horizontal position code, and the display code memory 309 holds the row background color designation code within the horizontal display period and outputs it as row background color designation information 339. To do. Thereafter, when the address 208 is incremented by 1, the display code memory 309 holds the row background end horizontal position code corresponding to the incremented address within the horizontal display period, and ends the row background as row background end horizontal position information 231. Output to the horizontal position coincidence detection circuit 135. Thereafter, each time the character switching signal 722 is input, the address 208 is incremented by one, whereby the display code memory 309 outputs the display character code 710 and the display character width code 711 corresponding to the incremented address. As a result, one character to be displayed is switched.

  The color table 327 includes serial data 726 received from the serial conversion circuit 725, a line background range designation signal 138 received from the line background range signal generation circuit 137, and line background color designation information 339 received from the display code memory 309. Based on this, an RGB signal 128 is output. Here, the color table 327 outputs an RGB signal of a preset character color for the dots constituting a part of the font, and the RGB signal 128 of the row background color for the other dots. However, in the range where the line background range designation signal 138 is active, the RGB signal 128 of the line background color designated by the line background color designation information 339 is outputted for dots other than the dots constituting a part of the font. To do.

  With the above operation, in the display screen shown in FIG. 10, the row background color 1012, the second row background color 1013, the third row background color 1014, the fourth row background color 1015, The row background color 1016 of the fifth row can be displayed as a different color.

  As described above, the on-screen display device according to Embodiment 3 includes, for each display line, the code indicating the display start horizontal position of the line background, the code indicating the display end horizontal position of the line background, and the line background color. The code to be displayed is set in the display code memory 309, and the range and color of the row background to be displayed on the screen are designated based on the row background horizontal position and the row background color indicated by each code. Thereby, since the background color can be individually set for each row, a flexible display layout can be set.

(Embodiment 4)
FIG. 4 is a block diagram showing a configuration of an on-screen display device according to Embodiment 4 of the present invention. In FIG. 4, the same reference numerals are used for the same components as those in FIGS. 1, 2, and 7. The on-screen display device according to the fourth embodiment includes two row background start horizontal position coincidence detection circuits, two line background end horizontal position coincidence detection circuits, and two row background range signal generation circuits. The operation of the on-screen display device configured as described above will be described. The description of the operation of the same components as those of the on-screen display device shown in FIGS. 1, 2, and 7 is omitted.
The display code memory address generation circuit 407 generates a code stored in the display code memory 409 based on the horizontal display position information 705, the vertical display position information 706, the character switching signal 722, and the horizontal display start position signal 724. An address 408 corresponding to is generated.

  The display code memory 409 includes a display character code of characters to be displayed on the screen, a display character width code for each display character, a horizontal display start position code for each display line, and a first line background for each display line. Start horizontal position code, first line background end horizontal position code, first line background color designation code, second line background start horizontal position code, second line background end horizontal position code for each display line , And the second row background color designation code. In the display code memory 409, the horizontal display start position code, the first line background start horizontal position code, the first line background end horizontal position code, and the second line background start are sequentially performed from the top address of each display line. The horizontal position code and the second row background end horizontal position code are stored, and the display character code of the character string and the display character width code are successively stored at the subsequent addresses.

  Here, the horizontal display start position code of the character line in the display code memory 409 is stored at the first address, and the display code memory 409 holds the horizontal display start position code within the horizontal display period. And output as a horizontal display start position code 712. Thereafter, when the address 408 is incremented by 1, the display code memory 409 holds the first row background start horizontal position code corresponding to the incremented address within the horizontal display period, and the first row background start horizontal position information. It outputs as 430. Further, the first row background color designation code is embedded in the first row background start horizontal position code, and the display code memory 409 holds the first row background color designation code within the horizontal display period. Are output as first row background color designation information 439. Thereafter, when the address 408 is incremented by one, the display code memory 409 holds the first row background end horizontal position code corresponding to the incremented address within the horizontal display period, and the first row background end horizontal position information. 431 is output. After that, when the address 408 is incremented by one, the display code memory 409 holds the second row background start horizontal position code corresponding to the incremented address within the horizontal display period, and the second row background start horizontal Output as position information 440. In addition, the second row background color designation code is embedded in the second row background start horizontal position code, and the display code memory 409 holds the second row background color designation code within the horizontal display period. Are output as second row background color designation information 448. Thereafter, when the address 408 is incremented by one, the display code memory 409 holds the second row background end horizontal position code corresponding to the incremented address within the horizontal display period, and stores the second row background end horizontal position information. It outputs as 441. Thereafter, each time the character switching signal 722 is input, the address 408 is incremented by one, and the display character code 710 and the display character width code 711 corresponding to the address are output from the display code memory 409. One character to be displayed is switched.

  The first row background start horizontal position coincidence detection circuit 433 compares the horizontal display position information 705 received from the display position output circuit 701 with the first row background start horizontal position information 430 received from the display code memory 409. When they match, the row background start horizontal position coincidence signal 434 is output.

  The first row background end horizontal position coincidence detection circuit 435 compares the horizontal display position information 705 received from the display position output circuit 701 with the first row background end horizontal position information 431 received from the display code memory 409. When they match, the row background end horizontal position coincidence signal 436 is output.

  The first row background range signal generation circuit 437 receives the first row background start horizontal position match signal 434 received from the first row background start horizontal position match detection circuit 433 and the first row background end horizontal position match detection. First row background range designation indicating a range from the first row background start horizontal position to the first row background end horizontal position based on the first row background end horizontal position coincidence signal 436 received from the circuit 435. The signal 438 is output to the color table 427.

  The second row background start horizontal position coincidence detection circuit 442 compares the horizontal display position information 705 received from the display position output circuit 701 with the second row background start horizontal position information 440 received from the display code memory 409. When they match, a row background start horizontal position coincidence signal 444 is output.

  The second row background end horizontal position coincidence detection circuit 443 compares the horizontal display position information 705 received from the display position output circuit 701 with the second row background end horizontal position information 441 received from the display code memory 409. When the lines match, the line background end horizontal position coincidence signal 445 is output.

  The second row background range signal generation circuit 446 receives the second row background start horizontal position coincidence signal 444 received from the second row background start horizontal position coincidence detection circuit 442 and the second row background end horizontal position coincidence detection. A second row background range designation signal indicating a range from the second row background start horizontal position to the second row background end horizontal position based on the second row background end horizontal position coincidence signal 445 received from the circuit 443. 447 is output to the color table 427.

  The color table 427 includes the serial data 726 received from the serial conversion circuit 725, the first row background range designation signal 438 received from the first row background range signal generation circuit 437, and the second row background range signal generation circuit. The second row background color designation information 447 received from the display code memory 409, the second row background color designation information 448 received from the display code memory 409, The RGB signal 128 is output based on the above. Here, the color table 427 outputs the RGB signal 128 of the character color set in advance for the dots constituting a part of the font, and the RGB signal of the row background color for the other dots. However, in the range where the first row background range designation signal 438 is active, the row background color designated by the first row background color designation information 439 for dots other than the dots constituting a part of the font RGB signal 128 is output. In the range where the first row background range designation signal 438 is not active and the second row background range designation signal 447 is active, the second row is applied to dots other than the dots constituting a part of the font. The row background color RGB signal 128 designated by the background color designation information 448 is output.

  With the above operation, for example, as shown in FIG. 11, the first row background start horizontal position 1105, the first row background end horizontal position 1106, the second row background start horizontal position from the first row to the third row. By setting 1117 and the second row background end horizontal position 1118, the background frame divided into two places in the horizontal direction can be displayed. In the display screen, the first row background color 1112 of the first row, the second row background color 1119 of the first row, the first row background color 1113 of the second row, the second row of the second row. The background color 1120, the first row background color 1114 of the third row, and the second row background color 1121 of the third row can also be displayed as different colors.

  As described above, the on-screen display device according to the fourth embodiment includes the code indicating the display start horizontal position of the line background, the code indicating the display end horizontal position of the line background, and the line background color for each display line. Two sets of codes are set, and the range and color of the line background to be displayed on the screen are designated based on the horizontal position and line background color indicated by each code. Thereby, since two line background ranges and two line background colors can be set for each display line, a flexible display layout can be set.

  In the fourth embodiment, the circuit configuration is such that two sets of row background start horizontal position, row background end horizontal position, and row background color can be set for each display row. It is good also as a structure which can set 2 or more sets for every line.

(Embodiment 5)
FIG. 5 is a block diagram showing the configuration of the on-screen display device according to Embodiment 5 of the present invention. In FIG. 5, the same reference numerals are used for the same components as those in FIGS. 1, 2, and 7. The on-screen display device according to the fifth embodiment is characterized in that the on-screen display device shown in FIG. 2 further includes a row background shadow color designation signal generation circuit 550. The operation of the on-screen display device configured as described above will be described. The description of the operation of the same components as those of the on-screen display device shown in FIGS. 1, 2, and 7 is omitted.

  The display code memory 509 displays a display character code of characters to be displayed on the screen, a display character width code for each display character, a horizontal display start position code, a line background start horizontal position code, and a line background end for each display line. A horizontal position code, a line background color designation code, and a first line background shadow designation code are stored. In the display code memory 409, a horizontal display start position code, a line background start horizontal position code, and a line background end horizontal position code are stored in order from the top address of each display line. The display character code of the column and the display character width code are stored in succession.

  Here, the horizontal display start position code of the character line in the display code memory 509 is stored at the first address, and the display code memory 509 holds the horizontal display start position code within the horizontal display period. And output as a horizontal display start position code 712. Thereafter, when the address 208 is incremented by 1, the display code memory 509 holds the row background start horizontal position code corresponding to the incremented address within the horizontal display period and outputs it as the row background start horizontal position information 230. Further, the line background shadow color designation code and the line background shadow designation code are embedded in the line background start horizontal position code, and the display code memory 509 holds the line background shadow color designation code within the horizontal display period. Are output as row background color designation information 539, and the first row background shadow designation code is held during the horizontal display period and outputted as row background shadow designation information 549. Thereafter, when the address 208 is incremented by 1, the display code memory 509 holds the row background end horizontal position code corresponding to the incremented address within the horizontal display period and outputs it as the row background end horizontal position information 231. Thereafter, each time the character switching signal 722 is input, the address 208 is incremented by one, and the display character code 710 and the display character width code 711 corresponding to the incremented address are output from the display code memory 509. , One character to be displayed is switched.

  The row background shadow color designation signal generation circuit 550 includes the vertical display position information 706 received from the display position output circuit 701, the row background start horizontal position match signal 134 received from the row background start horizontal position match detection circuit 133, and the row background. The line background end horizontal position coincidence signal 136 received from the end horizontal position coincidence detection circuit 135, the line background color designation information 539 received from the display code memory 509, and the line background shadow designation information 549 received from the display code memory 509 Based on this, a line background shadow color designation signal 551 is generated and output to the color table 527.

  Here, the line background shadow color designation signal generation circuit 550 identifies the top dot position of the display line and the bottom dot position of the display line from the vertical display position information 706. Further, the left end position of the line background of the display line is identified from the line background start horizontal position coincidence signal 134, and the right end position of the line background of the display line is identified from the line background end horizontal position coincidence signal 136, respectively. Then, an internal signal indicating the positions of the four sides around the line background is generated from each identified position. The line background shadow designation information 549 is a signal having at least three states, and indicates three types of settings: no line background shadow, line background shadow convex, and line background shadow concave. When the line background shadow designation information 549 indicates that there is no line background shadow, the line background color designation information 539 is output as it is as the line background shadow color designation signal 551. On the other hand, when the line background shadow designation information is line background shadow convex, a line background shadow color designation signal 551 for designating a preset background shadow white color for the upper and left sides of the positions of the four sides around the line background. Is output for the right and lower sides of the four positions around the line background, and a line background shadow color designation signal 551 for designating a preset background shadow black color is output. If it is not the position, the line background color designation information 539 is output as it is as the line background shadow color designation signal 551. When the line background shadow designation information 549 is a line background shadow concave, a line background shadow color designation signal for designating a preset background shadow black color for the upper side and the left side of the positions of the four sides around the line background. 551 is output, and a row background shadow color designation signal 551 for designating a preset background shadow white color is output for the right and bottom sides of the positions of the four sides around the row background, and the four sides around the row background are output. If it is not the position, the line background color designation information 539 is output as it is as the line background shadow color designation signal 551.

  The color table 527 includes the serial data 726 received from the serial conversion circuit 725, the row background range designation signal 138 received from the row background range signal generation circuit 137, and the row background shadow received from the row background shadow color designation signal generation circuit 550. Based on the color designation signal 551, an RGB signal 128 is output.

  Here, the color table 527 outputs the RGB signal 128 of the character color set in advance for the dots constituting a part of the font, and the RGB signal of the row background color for the other dots. In the range in which the line background range designation signal 138 is active, the RGB signal 128 of the line background color designated by the line background shadow color designation signal 551 for dots other than the dots constituting a part of the font. Is output.

  By the operation as described above, for example, a shadow can be added to the row background as shown in FIG. The display example shown in FIG. 12 is an example in which the setting of the line background shadow is set for the first line, the setting for no line background shadow is set for the second line, and the line background shadow is set for the third line. As shown in FIG. 12, since the white line background shadow is displayed on the upper side and the left side in the first line and the black line background shadow is displayed on the right side and the lower side, the entire first line is three-dimensionally raised. Is displayed. In the third line, white line background shadows are displayed on the right and bottom sides, and black line background shadows are displayed on the top and left sides, so that the entire third line is displayed in a three-dimensional depression. Yes.

  As described above, the off-screen display device according to the fifth embodiment has, for each display line, a code indicating the display start horizontal position of the line background, a code indicating the display end horizontal position of the line background, and the line background color. Is set in the display code memory 509, and the code indicating the shadow color to be added to the line background is displayed on the screen based on the horizontal position, line background color, and line background shadow color indicated by each code. The range and color of the line background to be used, and the shadow to be added to the line background were specified. Thereby, a shadow can be displayed with respect to a line background for every line. As described above, the display of the line background shadow enables a three-dimensional display for each line, and a flexible display layout can be set.

(Embodiment 6)
FIG. 6 is a block diagram showing a configuration of an on-screen display device according to Embodiment 6 of the present invention. In FIG. 6, the same reference numerals are used for the same components as those in FIGS. 1, 2, 5, and 7. The on-screen display device according to the sixth embodiment is different from the on-screen display device according to the fifth embodiment only in operations of the display code memory and the row background shadow color designation signal generation circuit. Hereinafter, the operation of the on-screen display device according to the sixth embodiment will be described. Description of the operation of the same components as those of the on-screen display device shown in FIGS. 1, 2, 5, and 7 is omitted.

  The display code memory 609 includes a display character code to be displayed on the screen, a display character width code for each display character, a horizontal display start position code for each display line, and a line background start horizontal position code for each display line. The row background end horizontal position code for each display line, the line background color designation code for each display line, the first line background shadow designation code for each display line, and the second line for each display line The background shadow designation code is stored. In this display code memory 609, a horizontal display start position code, a line background start horizontal position code, and a line background end horizontal position code are stored in order from the top address of each display line. Display character code and display character width code are stored in succession.

  Here, the horizontal display start position code of the character line in the display code memory 609 is stored at the first address, and the display code memory 609 holds the horizontal display start position code within the horizontal display period. And output as a horizontal display start position code 712. Thereafter, when the address 208 is incremented by 1, the display code memory 609 holds the row background start horizontal position code corresponding to the incremented address within the horizontal display period and outputs it as the row background start horizontal position information 230. The row background start horizontal position code includes a row background color designation code, a first row background shadow designation code, and a second row background shadow designation code, and the display code memory 609 stores the row background color designation code. The background color designation code is retained within the horizontal display period and output as line background color designation information 539, the first line background shadow designation code is retained within the horizontal display period and output as line background shadow designation information 549, and the second The row background shadow designation code is retained within the horizontal display period, and is output as row background shadow upper / lower stage designation information 652. Thereafter, when the address 208 is incremented by 1, the display code memory 609 holds the row background end horizontal position code corresponding to the incremented address within the horizontal display period and outputs it as the row background end horizontal position information 231. Thereafter, each time the character switching signal 722 is input, the address 208 is incremented by one, and the display character code 710 and the display character width code 711 corresponding to the incremented address are output from the display code memory 609. , One character to be displayed is switched.

  The row background shadow color designation signal generation circuit 650 includes the vertical display position information 706 received from the display position output circuit 701, the row background start horizontal position match signal 134 received from the row background start horizontal position match detection circuit 133, and the row background. A line background end horizontal position coincidence signal 136 received from the end horizontal position coincidence detection circuit 135, line background color designation information 539 received from the display code memory 609, line background shadow designation information 549 received from the display code memory 609, The line background shadow color designation signal 551 is generated from the line background shadow upper / lower stage designation information 652 received from the display code memory 609 and output to the color table 527.

  Here, the line background shadow color designation signal generation circuit 650 identifies the top dot position of the display line and the bottom dot position of the display line from the vertical display position information 706. Further, the left end position of the line background of the display line is identified from the line background start horizontal position coincidence signal 134, and the right end position of the line background of the display line is identified from the line background end horizontal position coincidence signal 136, respectively. Then, an internal signal indicating the positions of the four sides around the line background is generated from the identified position. On the other hand, the line background shadow designation information 549 is a signal having at least three states and indicates three types of settings: no line background shadow, line background shadow convex, and line background shadow concave. The row background shadow upper / lower row designation information 652 is a signal having at least four states, and indicates four types of settings: row background shadow single row, row background shadow upper row, row background shadow middle row, and row background shadow lower row. That is, this information indicates whether to add a background shadow to each single-line background or to add a background shadow to a line background composed of a plurality of lines. In the sixth embodiment, a case where a shadow is added to a line background consisting of three lines will be described.

  The operation of the row background shadow color designation signal generation circuit 650 when the row background shadow upper / lower stage designation information 652 is a row background shadow single row is described below. In this case, as in the fifth embodiment, when the line background shadow designation information 549 indicates no line background shadow, the line background color designation information 539 is output as it is as the line background shadow color designation signal 551. When the line background shadow designation information is line background shadow convex, a line background shadow color designation signal 551 for designating a preset background shadow white color for the upper side and the left side of the positions of the four sides around the line background is displayed. Output the row background shadow color designation signal 551 for designating a preset background shadow black color for the right side and the lower side of the positions of the four sides around the row background, and the positions of the four sides around the row background. If not, the line background color designation information 539 is output as the line background shadow color designation signal 551 as it is. Further, when the line background shadow designation information 549 is a line background shadow concave, the line background shadow color for designating a preset background shadow black for the upper side and the left side of the positions of the four sides around the line background. A designation signal 551 is outputted, and a row background shadow color designation signal 551 for designating a preset background shadow white color is outputted for the right side and the lower side among the positions of the four sides around the row background. When it is not the position of the four sides, the row background color designation information 539 is output as it is as the row background shadow color designation signal 551.

  Next, the operation of the row background shadow color designation signal generation circuit 650 when the upper and lower row designation information 652 on the row background shadow is the upper row background shadow will be described. When the line background shadow designation information is no line background shadow, the line background color designation information 539 is output as it is as the line background shadow color designation signal 551. When the line background shadow designation information 549 is line background shadow convex, a line background shadow color designation signal for designating a preset background shadow white color for the upper and left sides of the positions of the four sides around the line background. 551 is output, and a row background shadow color designation signal 551 for designating a preset background shadow black color is output for the right side of the positions of the four sides around the row background, and the positions of the four sides around the row background are output. The row background color designation information 539 is output as it is as the row background shadow color designation signal 551 when it is not the position of the lower side or the surrounding four sides. Further, when the line background shadow designation information 549 is a line background shadow concave, the line background shadow color for designating a preset background shadow black for the upper side and the left side of the positions of the four sides around the line background. A designation signal 551 is output, and a line background shadow color designation signal 551 for designating a preset background shadow white color is output for the right side of the positions of the four sides around the line background, and the four sides around the line background are output. The row background color designation information 539 is output as it is as the row background shadow color designation signal 551 when the position is not the position of the lower side or the surrounding four sides.

  Next, the operation of the row background shadow color designation signal generation circuit 650 when the upper and lower row designation information 652 of the row background shadow is the middle row background shadow will be described. When the line background shadow designation information is no line background shadow, the line background color designation information 539 is output as it is as the line background shadow color designation signal 551. When the line background shadow designation information 549 is line background shadow convex, a line background shadow color designation signal 551 for designating a preset background shadow white color is given to the left side of the positions of the four sides around the line background. A line background shadow color designation signal 551 for designating a preset background shadow black color is output for the right side of the positions of the four sides around the line background, and the position of the four sides around the line background is output. If it is not the position of the upper side or the lower side or the surrounding four sides, the row background color designation information 539 is output as it is as the row background shadow color designation signal 551. Further, when the line background shadow designation information 549 is a line background shadow concave, a line background shadow color designation signal for designating a preset background shadow black for the left side of the positions of the four sides around the line background. 551 is output, and a line background shadow color designation signal 551 for designating a preset background shadow white color is output for the right side of the positions of the four sides around the line background, and the positions of the four sides around the line background are output. The row background color designation information 539 is output as it is as the row background shadow color designation signal 551 when it is not the position of the upper side, the lower side, or the surrounding four sides.

  Finally, the operation of the row background shadow color designation signal generation circuit 650 when the row background shadow upper middle lower stage designation information 652 is the row background shadow lower stage is shown. When the line background shadow designation information 549 indicates no line background shadow, the line background color designation information 539 is output as it is as the line background shadow color designation signal 551. When the line background shadow designation information 549 is line background shadow convex, a line background shadow color designation signal 551 for designating a preset background shadow white color for the left side of the positions of the four sides around the line background. , And a row background shadow color designation signal 551 for designating the background shadow black color set in advance is output for the lower or right side of the four positions around the row background. If it is not the position of the upper side or the positions of the four surrounding sides, the row background color designation information 539 is output as the row background shadow color designation signal 551 as it is. Further, when the line background shadow designation information 549 is a line background shadow concave, a line background shadow color designation signal for designating a preset background shadow black for the left side of the positions of the four sides around the line background. 551 is output, and a row background shadow color designation signal 551 for designating a preset background shadow white color is output for the lower side or right side of the positions of the four sides around the row background, and the four sides around the row background are output. The row background color designation information 539 is output as it is as the row background shadow color designation signal 551 when it is not the position of the upper side or the positions of the four surrounding sides.

  With the operation as described above, it is possible to add a shadow to a line background composed of a plurality of lines. For example, in the display example shown in FIG. 13, all the three lines are set to the row background shadow convex, the first line is the upper setting of the line background shadow, the second line is the middle setting of the line background shadow, and the third line is the line. It is a display example at the time of setting a background shadow lower stage. As shown in FIG. 13, in the first line, a white line background shadow is displayed on the upper side 1330 and the left side 1331, a black line background shadow is displayed on the right side 1334, and on the second line, a white line background shadow is displayed on the left side 1332 and Shows a black line background shadow, and in the third line, a white line background shadow is displayed on the left side 1333, and a black line background shadow is displayed on the right side 1336 and the lower side 1337, so three lines from the first line to the third line are displayed. The whole frame is displayed so as to protrude three-dimensionally.

  As described above, the off-screen display device according to Embodiment 6 includes, for each display line, the code indicating the display start horizontal position of the line background, the code indicating the display end horizontal position of the line background, and the line background color. A code indicating the shadow color to be added to the line background, and a code indicating whether to add the line background shadow over a plurality of lines are set in the display code memory 509, and the line background horizontal position and line background color indicated by each code, Based on the line background shadow color and the display position of the line background shadow, the range and color of the line background to be displayed on the screen, and the color and position of the shadow attached to the line background are specified. Thereby, a shadow can be displayed on the line background over a plurality of lines. As described above, the upper, middle, and lower stage setting display of the line background shadow allows the entire frame extending over a plurality of lines to be displayed three-dimensionally, and a flexible display layout can be set.

  In the sixth embodiment, the case where a shadow is added to a line background consisting of three lines has been described. However, the present invention is not limited to this, and a configuration may be used in which a shadow is applied to a line background consisting of a plurality of lines.

  The on-screen display device according to the present invention has a circuit that can easily set a background frame for character display, and is useful as an on-screen display that displays a menu on a television or monitor screen.

It is a block diagram which shows the structure of the on-screen display apparatus which concerns on Embodiment 1 of this invention. It is a block diagram which shows the structure of the on-screen display apparatus which concerns on Embodiment 2 of this invention. It is a block diagram which shows the structure of the on-screen display apparatus which concerns on Embodiment 3 of this invention. It is a block diagram which shows the structure of the on-screen display apparatus which concerns on Embodiment 4 of this invention. It is a block diagram which shows the structure of the on-screen display apparatus which concerns on Embodiment 5 of this invention. It is a block diagram which shows the structure of the on-screen display apparatus which concerns on Embodiment 6 of this invention. It is a block diagram which shows the structure of the conventional on-screen display apparatus. It is a figure which shows the example of a display of the on-screen display apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the example of a display of the on-screen display apparatus which concerns on Embodiment 2 of this invention. It is a figure which shows the example of a display of the on-screen display apparatus which concerns on Embodiment 3 of this invention. It is a figure which shows the example of a display of the on-screen display apparatus which concerns on Embodiment 4 of this invention. It is a figure which shows the example of a display of the on-screen display apparatus which concerns on Embodiment 5 of this invention. It is a figure which shows the example of a display of the on-screen display apparatus which concerns on Embodiment 6 of this invention. It is a figure which shows the example of a display of the conventional on-screen display apparatus.

Explanation of symbols

127 Color table 128 RGB signal 129 Line background start horizontal position storage circuit 130 Line background start horizontal position information 131 Line background end horizontal position information 132 Line background end horizontal position storage circuit 133 Line background start horizontal position coincidence detection circuit 134 Line background start horizontal Position coincidence signal 135 Line background end horizontal position coincidence detection circuit 136 Line background end horizontal position coincidence signal 137 Line background range designation signal generation circuit 138 Line background range designation signal 139 729 On-screen display output unit 207 Display code memory address generation circuit 208 Display Code memory address 209 Display code memory 230 Line background start horizontal position information 232 Line background end horizontal position information 309 Display code memory 327 Color table 339 Line background color designation information 407 Display code memory address generation Path 408 display code memory address 409 display code memory 427 color table 430 first row background end horizontal position information 433 first row background start horizontal position coincidence detection circuit 434 first row background start horizontal position coincidence signal 435 first Row background end horizontal position coincidence detection circuit 436 First row background end horizontal position coincidence signal 437 First row background range designation signal generation circuit 438 First row background range designation signal 439 First row background color designation information 440 First Second row background start horizontal position information 441 Second row background end horizontal position information 442 Second row background start horizontal position coincidence detection circuit 443 Second row background end horizontal position coincidence detection circuit 444 Second row background start horizontal position information Position match signal 445 Second row background end horizontal position match signal 446 Second row background range designation signal generation circuit 447 Second Line background range designation signal 448 Second background color designation information 509 Display code memory 527 Color table 539 Line background color designation information 549 Line background shadow designation information 550 Line background shadow color designation signal generation circuit 551 Line background shadow color designation signal 609 Display Code memory 649 Row background shadow designation information 650 Row background shadow color designation signal generation circuit 652 Row background shadow upper / lower stage designation information 701 Display position output circuit 702 Vertical synchronization signal 703 Horizontal synchronization signal 704 Display dot clock 705 Horizontal display position information 706 Vertical Display position information 707 Display code memory address generation circuit 708 Display code memory address 709 Display code memory 710 Display character code 711 Display character width code 712 Horizontal display start position code 713 Font data memory address generation circuit 714 Phone Data memory address 715 font data memory 716 font data 717 character width counter 718 character width count value 719 character width code conversion circuit 720 character width data 721 character width match detection circuit 722 character switching signal 723 horizontal display position match detection circuit 724 horizontal display Start position signal 725 Serial conversion circuit 726 Serial data 727 Color table 728 RGB output 805 Line background start horizontal position 806 Line background end horizontal position 901 Horizontal display start position from the first line to the third line 902 First line end position 903 Second line end position 904 Third line end position 905 First line background background horizontal position 906 Second line background background horizontal position 907 Third line background background horizontal position 908 First line background End horizontal position 909 Second row Scene end horizontal position 910 Third row background end horizontal position 911 Fourth row and fifth row horizontal display start position 912 Fourth row end position 913 Fifth row end position 914 Fourth row background start horizontal Position 915 5th line background start horizontal position 916 4th line background background end horizontal position 917 5th line background background end horizontal position 1012 1st line background color 1013 2nd line background color 1014 3rd line Row background color of the eye 1015 Row background color of the fourth row 1016 Row background color of the fifth row 1101 Horizontal display start position from the first row to the third row 1105 First row background from the first row to the third row Start horizontal position 1106 First row background end horizontal position from the first row to the third row 1112 First row background color of the first row 1113 First row background color of the second row 1114 First of the third row Background color 1117 from line 1 to 3 Second background start horizontal position to the first 1118 Second background end horizontal position from the first to third lines 1119 First row second row background color 1120 Second row background color of the second row 1121 The second row background color of the third row 1222 The row background shadow color of the first row (upper side)
1223 Line background shadow color on left line (left side)
1224 Row background shadow color on the first row (right side)
1225 Line background shadow color of the first line (bottom side)
1226 3rd row background shadow color (upper side)
1227 3rd row background shadow color (left side)
1228 3rd row background shadow color (right side)
1229 Line background shadow color of 3rd line (bottom side)
1330 Line background shadow color of the first line (upper side)
1331 Line background shadow color on the first line (left side)
1332 Row background shadow color on the 2nd row (left side)
1333 Line background shadow color on the 3rd line (left side)
1334 Line background shadow color of the first line (right side)
1335 Row background shadow color on the 2nd row (right side)
1336 3rd line background shadow color (right side)
1337 3rd row background shadow color (right side)
1401 Horizontal display start position 1402 End position of the first line 1403 End position of the second line 1404 End position of the third line

Claims (6)

Display position output means for outputting display position information indicating the display position on the screen based on the vertical synchronization signal, the horizontal synchronization signal, and the display dot clock;
Display code storage means for storing, for each address corresponding to a display position on the screen, a display code of a character displayed on the screen, and a character width code set corresponding to each character indicated by the display code;
Display code address generating means for generating an address of the display code storage means based on the display position information and a character switching signal indicating a timing for switching characters to be displayed on the screen;
Font data storage means for storing font data;
Font data address generation for receiving a display code corresponding to the address generated by the display code address generation means from the display code storage means and generating an address of the font data storage means based on the display code and the display position information Means,
Character switching signal generation for receiving a character width code corresponding to the address generated by the display code address generating means from the display code storage means and generating the character switching signal based on the character width information code and the display dot clock Means,
Line background horizontal position for storing line background start horizontal position information indicating the display start horizontal position of the line background, which is the background frame of the line displaying the character, and line background end horizontal position information indicating the display end horizontal position of the line background Storage means;
A line background range indicating a range for displaying a line background from the line background start horizontal position information and line background end horizontal position information received from the line background horizontal position storage means and the display position information received from the display position output means. A line background range signal generating means for generating a signal;
The font data corresponding to the address generated by the font data address generating means, or the color signal of the character color set in advance corresponding to the line background range signal generated by the line background range signal generating means, or On-screen display output means for superimposing and outputting the color signal of the set row background color on the video signal;
An on-screen display device comprising: Display position output means for outputting display position information indicating the display position on the screen based on the vertical synchronization signal, the horizontal synchronization signal, and the display dot clock;
The display code of the character displayed on the screen and the character width code set corresponding to the character indicated by the display code are stored for each address corresponding to the display position on the screen and the character is displayed. Display code storage means for storing, for each display line, a row background start horizontal position code indicating a display start horizontal position of a line background and a line background end horizontal position code indicating a display end horizontal position of the line background;
Display code address generating means for generating an address of the display code storage means based on the display position information and a character switching signal indicating a timing for switching characters to be displayed on the screen;
Font data storage means for storing font data;
Font data address generation for receiving a display code corresponding to the address generated by the display code address generation means from the display code storage means and generating an address of the font data storage means based on the display code and the display position information Means,
Character switching signal generating means for receiving a character width code corresponding to the address generated by the display code address generating means from the display code storage means and generating the character switching signal based on the character width code and the display dot clock. When,
From the row background start horizontal position code and line background end horizontal position code received from the display code storage means, and the display position information received from the display position output means, a row background range signal indicating a range for displaying the row background is obtained. Generated line background range signal generating means;
The font data corresponding to the address generated by the font data address generating means, or the color signal of the character color set in advance corresponding to the line background range signal generated by the line background range signal generating means, or An on-screen display output means for outputting the color signal of the set row background color superimposed on the video signal;
An on-screen display device comprising: The on-screen display device according to claim 2,
The display code storage means further stores a row background color code indicating the color of the row background for each display row,
The on-screen display output means has a character set in advance corresponding to the font data corresponding to the address generated by the font data address generating means or the line background range signal generated by the line background range signal generating means. An on-screen display device, wherein a color signal of a color or a color signal of a row background color indicated by a row background color code received from the display code storage means is superimposed on a video signal and output. The on-screen display device according to claim 2,
The display code storage means stores two or more sets of the line background start horizontal position code, the line background end horizontal position code, and the line background color code for each display line,
The row background range signal generation means includes two or more sets of the row background start horizontal position code and the row background end horizontal position code received from the row background horizontal position storage means, and the display position received from the display position output means. And two or more line background range signals indicating the range in which the line background is displayed from the information,
The on-screen display output means corresponds to the font data corresponding to the address generated by the font data address generation means or two or more line background range signals generated by the line background range signal generation means in advance. The color signal of the set character color or the color signal of the line background color indicated by one of the two or more line background color codes received from the display code storage means is superimposed on the video signal and output. An on-screen display device. The on-screen display device according to claim 2,
The display code storage means further stores, for each display row, a first row background shadow designation code indicating which side of the four sides around the row background is to be shaded.
Display position information received from the display position output means, line background range signal received from the line background range signal generation means, line background color information and first line background shadow designation code received from the display code storage means A line background shadow color designation signal for generating a line background color designation signal for designating a line background color based on the above, or a line background shadow color designation signal for designating the colors of the four sides around the line background as the line background shadow color With generating means,
The on-screen display output means has a character set in advance corresponding to the font data corresponding to the address generated by the font data address generating means or the line background range signal generated by the line background range signal generating means. The color signal of the color, the color signal of the line background color specified by the line background color designation signal, or the color signal of the line background shadow color designated by the line background shadow color designation signal is superimposed on the video signal and output. An on-screen display device. The on-screen display device according to claim 5,
The display code storage means further stores a second line background shadow designation code indicating whether to shadow a line background consisting of a single line or a line background consisting of a plurality of lines,
The line background shadow color designation signal generating means includes the display position information received from the display position output means, the line background range signal received from the line background range signal generating means, and the line background received from the display code storage means. Based on the color code, the first line background shadow designation code, and the second line background shadow designation code, a line background color designation signal for designating a line background color, or four sides around a line background consisting of a single line An on-screen display device for generating a row background shadow color designation signal for designating a color or colors of four sides around a row background consisting of a plurality of rows as a row background shadow color.

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