JPH06284353A - On-screen display controller - Google Patents

Abstract

PURPOSE:To provide an on-screen display controller capable of obtaining more than two pieces of mutually different function operation information without causing he rise of cost due to the increase of a storage capacity. CONSTITUTION:This on-screen display controller is provided with an OSD control circuit 42. The OSD control circuit 42 respectively generates control signals for a display output control circuit 20 and display clock changeover signals for switching the frequency of display clocks based on display clock control data and also generates read addresses for a menu screen data memory 17 based on the display address data of menu data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device provided with a function selection display function for performing a selection operation for each function while referring to setting items relating to a plurality of functions displayed while being superimposed on an image on a screen. The present invention relates to an on-screen display control device used for.

[0002]

2. Description of the Related Art Generally, a television receiver (hereinafter referred to as T
V), video tape recorders (hereinafter referred to as VTRs), and other video devices, channel display, volume display,
There is provided a function selection display function for setting each function by displaying the setting items related to the functions of the video apparatus main body and the setting amount related to the setting items.

The T provided with this function selection display function
V will be described with reference to the drawings. FIG. 9 is a block diagram showing a TV provided with a conventional on-screen display control device.

As shown in FIG. 9, the TV has a video receiving circuit 2 for inputting a television signal received by an antenna 1.
Equipped with. The video receiving circuit 2 selects the television signal of the channel designated by the channel selecting circuit 3 from the received television signals, extracts the video signal by amplification and detection processing for this television signal,
A horizontal effective display period signal indicating a horizontal effective display period and a vertical effective display period signal indicating a vertical effective display period are generated.

Key input information from the key input receiving circuit 4 is input to the channel selection circuit 3, and the channel selection circuit 3 displays an instruction signal to the video receiving circuit 2 and a display to the on-screen display control device 6 based on this key input information. Generate control data. The key input reception circuit 4 takes in the key input information generated by operating the key 10 provided on the keypad 9, and outputs this key input information.

The video signal output from the video receiving circuit 2 is given to the color signal reproducing circuit 5, and the color signal reproducing circuit 5 converts the video signal into red (R), green (G) and blue (B) color signals. Restore to.

The on-screen display control device 6 uses the display control data from the channel selection circuit 3 and the horizontal effective display period signal and the vertical effective display period signal from the video receiving circuit 2 to display data for specified screen coordinates. , And red (R), green (G), and blue (B) color signals for on-screen display of the display data. The instruction signal from the channel selection circuit 3 indicates the display start position of the display data in the horizontal and vertical directions and the display address of the menu data.

The respective color signals generated by the on-screen display control device 6 are given to the color signal switching circuit 7 together with the respective color signals from the color signal reproducing circuit 5. The color signal switching circuit 7 alternately outputs each color signal from the color signal reproducing circuit 5 and each color signal from the on-screen display control device 6 and outputs the color signal to the color picture tube 8.

On the color picture tube 8, the color image generated by the color signal from the on-screen display controller 6 is displayed while being superimposed on the color image generated by each color signal from the color signal reproducing circuit 5.

Next, the above-mentioned on-screen display control device 6 will be described with reference to the drawings. FIG. 10 is a block diagram showing details of the on-screen display control device used in the TV shown in FIG.

The on-screen display controller 6 is shown in FIG.
As shown in FIG. 3, the oscillator circuit 11 has an oscillation circuit 11 for generating a display clock whose frequency is set to an integral multiple of the horizontal synchronizing signal. The display clock from the oscillation circuit 11 is given to the horizontal position counter 12, the OSD display control circuit 16 and the display data control circuit 19, which will be described later. Horizontal position counter 12
Counts the display clock from the oscillation circuit 11 and outputs the count value to the horizontal position decoder 13 while the horizontal effective display period signal from the video receiving circuit 2 (shown in FIG. 9) is being input. . The horizontal position decoder 13 compares the count value from the horizontal position counter 12 with the horizontal display start position data from the OSD display control circuit 16, and when the count value and the horizontal display start position data match, a match signal is sent to the OSD.
Output to the display control circuit 16.

The horizontal effective display period signal from the video receiving circuit 2 is supplied to the vertical position counter 1 together with the vertical effective display period signal.
Given to 5. The vertical position counter 15 counts horizontal scanning lines in the vertical direction based on the horizontal effective display period signal during the input period of the vertical effective display period signal, and outputs the count value to the vertical position decoder 14. The vertical position decoder 14 compares the count value from the vertical position counter 15 with the vertical display start position data from the OSD display control circuit 16, and if the count value and the vertical display start position data match, a match signal is sent to the OSD display control. Output to the circuit 16.

The OSD display control circuit 16 includes an oscillator circuit 1
The presence or absence of on-screen display is designated as display control data from the channel selection circuit 3 (shown in FIG. 9) together with the display clock from 1, the coincidence signal from the horizontal position decoder 13 and the coincidence signal from the vertical position decoder 14. A control signal, horizontal display data indicating a horizontal display position with respect to the display data and vertical display position data indicating a vertical display position thereof, and address data for the menu screen data are given. OSD display control circuit 1
Reference numeral 6 denotes a horizontal display start position data, a vertical display start position data, a read address for the menu screen data memory 17, and a display output control circuit 20 described later based on the control signal, the horizontal display data, the vertical display data and the address data. And a control signal, respectively. When the match signal from the horizontal position decoder 13 and the match signal from the vertical position decoder 14 are input to the OSD display control circuit 16, the read address for the menu screen data memory 17 is the menu screen data 1
7 is output.

O in the menu screen data memory 17
The color data in the data corresponding to the read address from the SD display control circuit 16 is output to the display control circuit 19.
The code data corresponding to the character is output to the CG-ROM 18.

The CG-ROM 18 generates a dot pattern of characters using the code data input thereto as an address. This dot pattern corresponds to the display data control circuit 19
Given to.

The display data display control circuit 19 generates red (R), green (G), and blue (B) color signals from the color data and the dot pattern on the basis of the display clock from the oscillation circuit 11, and red The respective color signals of (R), green (G) and blue (B) are given to the display output control circuit 20.

The display output control circuit 20, based on the control signal from the OSD display control circuit 16, displays red (R), green (G),
The output of each color signal of blue (B) is controlled.

However, in a TV provided with this on-screen display control device, the information obtained from the image is reduced by superimposing the display of the functional operation information on the image which is the object, which is not preferable.

It is conceivable to reduce the display area of the function operation information in order to suppress the reduction of the information obtained from the video, but this reduction of the display area makes it easier for the operator to make an operation error.

Instead of reducing the display area of the function operation information which is the cause of the operation error, two or more pieces of function operation information data having different display area sizes are provided and the operator is allowed to select the data. Can be considered. Each function operation information data is created so as to show the same operation content while changing its display area. However, since two or more function operation information data for performing the same operation are provided, the capacity of the memory for storing these function operation information data is the memory used in the conventional on-screen display control device. It is necessary to increase the memory capacity by increasing the memory capacity. As a result, the cost increases.

[0021]

As described above, the conventional on-screen display control device is provided with two or more function operation information for performing the same operation in which the sizes of the display areas are different from each other. By doing so, the occurrence of operation mistakes can be suppressed, but since two or more function operation information for performing the same operation is provided, the memory capacity increases and the cost due to the increase in the memory capacity increases. Will lead to a rise.

It is an object of the present invention to provide an on-screen display control device capable of obtaining two or more pieces of function operation information of different display formats without incurring an increase in cost due to an increase in storage capacity. To do.

[0023]

SUMMARY OF THE INVENTION The present invention is provided with a function selection display function for performing a selection operation for each function while referring to setting items relating to a plurality of functions displayed while being superimposed on an image on a screen. An on-screen display control device used in a device, which stores a character such as a character for representing the setting item and a plurality of display formats for defining the arrangement of the setting item, and an external device. Selection means for selecting the display format based on a selection instruction, reading means for reading out a character for representing the setting item from the storage means based on the selected display format, and reading based on the selected display format Display position control means for setting a horizontal display position and a vertical display position on the screen of the issued character, and the set water. And display control means for controlling to display the read out character direction display position and the vertical display position in the selected display format.

[0024]

[Operation] In the on-screen display control device of the present invention,
The display format is selected based on a selection instruction from the outside, a character for representing the setting item is read out from the storage means based on the selected display format, and the character is read out based on the selected display format. A horizontal display position and a vertical display position on the screen of the character are set, and the read character is displayed at the set horizontal display position and vertical display position in the selected display format. Take control.

By selecting the display format, the characters for representing the setting items arranged according to the display format are read out from the storage means. Therefore, the capacity of the storage means is the size of the display area. Different from each other and not larger than the capacity of the storage means for storing two or more functional operation information for performing the same operation, it is possible to suppress an increase in cost due to an increase in the capacity of the storage means. Therefore, it is possible to obtain two or more pieces of function operation information having different display formats without increasing the cost due to the increase in the storage capacity. Further, by presetting the display format in which the display area is reduced to the extent that an operator's operation error does not occur, it is possible to suppress the reduction of information obtained from the image in which the character is superimposed.

[0026]

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

FIG. 1 is a block diagram showing a TV in which an embodiment of the on-screen display control device of the present invention is used,
FIG. 2 is a block diagram showing a main part of a channel selection circuit used in the TV shown in FIG.

As shown in FIG. 1, the TV has a video receiving circuit 2 for inputting a television signal received by an antenna 1.
Equipped with. The video receiving circuit 2 selects the television signal of the channel designated by the channel selection circuit 30 from the received television signals, extracts the video signal by the amplification and detection processing for this television signal, and also in the horizontal direction. The horizontal effective display period signal indicating the effective display period and the vertical effective display period signal indicating the vertical effective display period are generated.

In the tuning circuit 30, as shown in FIG.
PU 31, program ROM 32 storing a program in which a predetermined procedure is described, and work RAM 33
, A key input interface 34 for connecting the CPU 31 and the key input receiving circuit 4, a video receiving interface 35 for connecting the CPU 31 and the video receiving circuit 2, a CPU 31 and the on-screen display control device 4.
An on-screen display controller interface 36 for connecting to 0 is built in.

The CPU 31 receives the key input information from the key input receiving circuit 4 via the key input interface 34, and the CPU 31 follows the program stored in the program ROM 32 and outputs an instruction signal to the video receiving circuit 2 from the key input information. And display control data for the on-screen display controller 40. The instruction signal to the video receiving circuit 2 is output via the video receiving interface 35, and the display control data to the on-screen display control device 40 is output via the on-screen control device interface 36. The key input acceptance circuit 4 takes in the key input information generated by operating the key 10 provided on the keypad 9, and outputs this key input information to the channel selection circuit 30.

The video signal output from the video receiving circuit 2 is given to the color signal reproducing circuit 5, and the color signal reproducing circuit 5 converts the video signal into red (R), green (G) and blue (B) color signals. Restore to.

The on-screen display control device 40 displays the display data for the designated screen coordinates based on the display control data from the channel selection circuit 30 and the horizontal effective display period signal and the vertical effective display period signal from the video receiving circuit 2. , And red (R), green (G), and blue (B) color signals for on-screen display of the display data. The display control data from the tuning circuit 30 includes data indicating the presence / absence of display, display start position data in the horizontal and vertical directions of the display data, display address data of menu data, and display clock control data.

The respective color signals generated by the on-screen display control device 40 are given to the color signal switching circuit 7 together with the respective color signals from the color signal reproducing circuit 5. The color signal switching circuit 7 alternately outputs each color signal from the color signal reproducing circuit 5 and each color signal from the on-screen display control device 40 to output to the color picture tube 8.

On the color picture tube 8, the color image generated by the color signals from the color signal reproducing circuit 5 and the color image generated by the color signals from the on-screen display control device 40 are superimposed and displayed.

Next, the above-mentioned on-screen display control device 40 will be described with reference to the drawings. FIG. 3 is a block diagram showing details of the on-screen display control device used in the TV of FIG.

The on-screen display controller 40 is shown in FIG.
As shown in FIG. 3, the oscillator circuit 4 for generating the display clock whose frequency is set to be variable by an integral multiple of the horizontal synchronizing signal.
Has 1. The display clock from the oscillation circuit 41 is given to the horizontal position counter 12, the OSD display control circuit 42 and the display data control circuit 19, which will be described later. The horizontal position counter 12 counts the display clock from the oscillation circuit 41 during the period in which the horizontal effective display period signal from the video receiving circuit 2 (shown in FIG. 1) is input, and the counted value is counted by the horizontal position decoder. It outputs to 13. The horizontal position decoder 13 compares the count value from the horizontal position counter 12 with the horizontal display start position data from the OSD display control circuit 42, and when the count value and the horizontal display start position data match, a match signal is sent to the OSD display control. Output to the circuit 42.

The horizontal effective display period signal from the video receiving circuit 2 (shown in FIG. 1) is given to the vertical position counter 15 together with the vertical effective display period signal. Vertical position counter 15
During the input period of the vertical effective display period signal, counts horizontal scanning lines in the vertical direction based on the horizontal effective display period signal and outputs the counted value to the vertical position decoder 14. The vertical position decoder 14 receives the count value from the vertical position counter 15 and O
The vertical display start position data from the SD display control circuit 42 is compared, and when the count value and the vertical display start position data match, a match signal is output to the OSD display control circuit 42.

The OSD display control circuit 42 includes an oscillator circuit 4
1 with the display clock, the coincidence signal from the horizontal position decoder 13 and the coincidence signal from the vertical position decoder 14, as display control data from the tuning circuit 30 (shown in FIG. 1), data indicating the presence or absence of display, Horizontal and vertical display start position data of display data, menu data display address data, display clock control data, and address data for menu screen data are given. The OSD display control circuit 42 generates a control signal for the display output control circuit 20 and a display clock switching signal for switching the frequency of the display clock, which will be described later, on the basis of the display clock control data, and also uses the display address data of the menu data as the display address data. Based on this, a read address for the menu screen data memory 17 is generated.

The horizontal display start position data and the vertical display start position data are output from the OSD display control circuit 42 to the horizontal position decoder 13 and the vertical position decoder 15, respectively, and the read address for the menu screen data memory 17 is the OSD display control. Horizontal position decoder 1 in circuit 42
3 is inputted and the vertical position decoder 14
When the match signal from is input, it is output to the menu screen data 17.

O in the menu screen data memory 17
The color data in the data corresponding to the read address from the SD display control circuit 42 is output to the display control circuit 19,
The code data corresponding to the character is output to the CG-ROM 18.

The CG-ROM 18 generates a dot pattern of characters using the code data input thereto as an address. This dot pattern corresponds to the display data control circuit 19
Given to.

The display data display control circuit 19 generates red (R), green (G), and blue (B) color signals from the color data and the dot pattern on the basis of the display clock from the oscillation circuit 41, and outputs the red signal. The respective color signals of (R), green (G) and blue (B) are given to the display output control circuit 20.

The display output control circuit 20, based on the control signal from the OSD display control circuit 42, displays red (R), green (G),
The output of each color signal of blue (B) is controlled.

Next, the operation of the OSD display control device will be described with reference to the drawings. 4 is a flow chart showing the display processing operation by the CPU of the channel selection circuit used in the TV of FIG. 1, and FIG. 5 is C of the channel selection circuit used in the TV of FIG.
It is a flowchart which shows the procedure of the control data generation program with respect to the on-screen display control apparatus by PU.

Referring to FIG. 4, first, the key input information generated by the key operation of the keypad 9 is taken into the key input receiving circuit 4. The key input information taken into the key input receiving circuit 4 is given to the CPU 31 via the key input interface 34 (step 101).

After fetching the key input information, the CPU 31 generates an instruction signal for the video receiving circuit 2 from the key input information according to the program stored in the program ROM 32, and the instruction signal for the video receiving circuit 2 is sent to the video receiving interface 35. It is output via (step 102).

Next, the CPU 31 uses the program ROM 3
Display control data for the on-screen display control device 40 is generated from this key input information according to the program stored in No. 2, and the display control data for the on-screen display control device 40 is output via the on-screen control device interface 36. (Step 103).

Next, the procedure of the program for generating the display control data for the on-screen display controller 40 will be described.

Referring to FIG. 5, it is determined whether or not the key input information includes a menu display request (step 201). When the menu display request is not included,
The processing requested by the key input information is executed (step 2
02).

When the menu display request is included, it is determined whether or not the menu is being displayed (step 20).
3). If it is determined that the menu is not displayed,
Menu display processing is performed (step 204).

When it is determined that the menu is being displayed, it is determined whether or not the menu display content is changed (step 205). If it is determined that there is no change in the menu display content, menu ending processing is performed (step 206).

When the menu display is changed, the data value S indicating the display format of the current menu is compared with the maximum switching number Smax of the display format (step 207). When the data value S is larger than the maximum switching number Smax, the data value S is rewritten to "0". On the other hand, when the data value S is less than or equal to the maximum switching number Smax, "1" is added to the current data value S (step 209), and this data value S
The display format corresponding to is selected.

After adding "1" to the current data value S,
An instruction to generate a display clock switching signal for switching the frequency of the display clock is issued (step 210). Next, the display format data is read from the program ROM 32 based on the data value S (step 211), and the read data is output as horizontal display start position data.

Next, the data corresponding to the data value S is read from the program ROM 32, and the display address is generated from this data (step 212).

When the display clock display data of the display control data shows the value of the normal display and the selection display item shows the selection of all the items, as shown in FIG. 6, all the items for the operation function have the normal display density. Is displayed. Note that this display occupies about half of the screen.

Next, when the display clock control data is set to a value twice that of the normal display, the frequency of the display clock is set to a value twice the value of the normal display, as shown in FIG. Therefore, the size of the characters forming the display item, the character spacing, etc. are compressed in the horizontal direction of the screen, and this display area is reduced by about 50% with respect to the normal display area.

Next, when the display control data indicates the limitation of the selected display item, the number of data read from the menu screen data memory 17 is limited as shown in FIG. Since no display is performed, the area occupied by the screen due to the display of the function item is reduced.

From the above, the menu screen data memory 1
Since it is not necessary to increase the capacity of 7, it is possible to obtain two or more function operation information for performing the same operation and having different display areas without incurring a cost increase due to an increase in memory capacity. be able to.

[0059]

As described above, according to the on-screen display control device of the present invention, two or more display areas having different display areas from each other can be produced without incurring an increase in cost due to an increase in storage capacity. It is possible to obtain the function operation information of.

[Brief description of drawings]

FIG. 1 is a block diagram showing a TV provided with an embodiment of an on-screen display control device of the present invention.

FIG. 2 is a block diagram showing a main part of a channel selection circuit used in the TV shown in FIG.

3 is a block diagram showing details of an on-screen display control device used in the TV of FIG.

4 is a CPU of a tuning circuit used in the TV of FIG.
6 is a flowchart showing a display processing operation by the.

5 is a CPU of a tuning circuit used in the TV of FIG.
6 is a flowchart showing a procedure of a control data generation program for the on-screen display control device according to FIG.

6 is a diagram showing an example of a screen display by the on-screen display control device of FIG.

FIG. 7 is a diagram showing another example of screen display by the on-screen display control device of FIG.

8 is a diagram showing still another example of screen display by the on-screen display control device of FIG.

FIG. 9 is a block diagram showing a TV provided with a conventional on-screen display control device.

FIG. 10 is a block diagram showing details of the on-screen display control device of FIG. 9.

[Explanation of symbols]

9 ... Keypad, 12 ... Horizontal position counter, 13 ... Horizontal position decoder, 14 ... Vertical position decoder, 15 ... Vertical position counter, 17 ... Menu screen data memory, 18 ...
CG-ROM, 30 ... Channel selection circuit, 31 ... CPU, 32 ...
Program ROM, 40 ... On-screen display control device, 41 ... Oscillation circuit, 42 ... OSD display control circuit.

Claims (3)

[Claims] 1. An on-screen used for a device provided with a function selection display function for performing a selection operation for each function while referring to setting items related to a plurality of functions displayed while being superimposed on an image on a screen. A display control device, a storage unit that stores a plurality of display formats for defining characters such as characters for representing the setting items and the arrangement of the setting items, and the display format based on a selection instruction from the outside. Selecting means for selecting; reading means for reading a character for representing the setting item from the storage means based on the selected display format; and on the screen of the read character based on the selected display format. Display position control means for setting a horizontal display position and a vertical display position, and the set horizontal display position and vertical position. On-screen display control device characterized by comprising a display control means for controlling to display the read out character direction display position by said selected display format. 2. A display format in which one of the display formats stored in the storage means is displayed while increasing the display density of the character.
The on-screen display controller described in 1. 3. One of the display formats stored in the storage means is a display format in which an arrangement of setting items shortened by deleting or simplifying a part is defined. The on-screen display control device according to claim 1.