EP0526989A2 - Display control device - Google Patents

Display control device Download PDF

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Publication number
EP0526989A2
EP0526989A2 EP92306235A EP92306235A EP0526989A2 EP 0526989 A2 EP0526989 A2 EP 0526989A2 EP 92306235 A EP92306235 A EP 92306235A EP 92306235 A EP92306235 A EP 92306235A EP 0526989 A2 EP0526989 A2 EP 0526989A2
Authority
EP
European Patent Office
Prior art keywords
pallet
data
pallet data
colors
display
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP92306235A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0526989A3 (enrdf_load_stackoverflow
Inventor
Yasushiro c/o Pioneer Electronic Corp. Ayukai
Keiichi c/o Pioneer Electronic Corp. Yamauchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pioneer Corp
Original Assignee
Pioneer Electronic Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Publication of EP0526989A2 publication Critical patent/EP0526989A2/en
Publication of EP0526989A3 publication Critical patent/EP0526989A3/xx
Withdrawn legal-status Critical Current

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
    • G09G5/06—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed using colour palettes, e.g. look-up tables

Definitions

  • the present invention generally relates to a display control device, and more particularly to a display control device capable of performing a fade-in/fade-out process.
  • the luminance adjustment circuit controls a luminance signal of a display.
  • this type of display control device has the following disadvantages. Namely, it is necessary to exclusively equip a luminance adjustment circuit in order to perform the fade-out/fade-in process, resulting in making the circuit configuration rather complicated, and thus increasing the production cost. Further, the luminance adjustment circuit is capable of carrying out the fade-out/fade-in process for only an entire picture plane, and finally providing only a white or black picture plane as the result.
  • a display control device for controlling a display unit according to a control signal, which is given from an external device to indicate a fade-in/fade-out process to be performed.
  • the display control device includes: a control unit for receiving the control signal and for generating a data change signal on the basis of the control signal; a picture data storage unit for storing picture data to be displayed; and a color pallet unit, to which the picture data is inputted from the picture data storage unit, for storing pallet data corresponding to displayable colors of the display unit and for outputting the pallet data on the basis of the inputted picture data.
  • the display control device further includes: a pallet data updating unit, coupled to the control unit and the color pallet unit, for gradually updating at least a part of the pallet data in the color pallet unit on the basis of the data change signal; and a signal conversion unit, coupled to the color pallet unit, for converting the updated pallet data into display signals and for outputting the display signals to the display unit.
  • a pallet data updating unit coupled to the control unit and the color pallet unit, for gradually updating at least a part of the pallet data in the color pallet unit on the basis of the data change signal
  • a signal conversion unit coupled to the color pallet unit, for converting the updated pallet data into display signals and for outputting the display signals to the display unit.
  • the hue, brightness and/or saturation on the picture plane can be easily changed without a specific circuit such as a luminance adjustment circuit.
  • a specific circuit such as a luminance adjustment circuit.
  • the pallet data updating unit is adapted to gradually change values indicated by the pallet data for each of the displayable colors so that a picture plane on the display unit fades out or fade in.
  • the pallet data updating unit may be preferably adapted to change, a predetermined number of times, the values indicated by the pallet data by a predetermined value.
  • the pallet data updating unit is adapted to gradually decrease or increase, a predetermined number of times, values indicated by the pallet data for each of the displayable colors by a predetermined value so that a picture plane on the display unit fades out or fade in.
  • the pallet data updating unit is adapted to gradually multiply, a predetermined number of times, values indicated by the pallet data for each of the displayable colors by a predetermined value so that pictures of all the displayable colors on the display unit simultaneously finishes fading out or fading in.
  • the data change signal shows a specified color
  • the pallet data updating unit is adapted to gradually change values indicated by the pallet data for each of the displayable colors so that a picture plane on the display unit fades out and finally has the specified color, or so that a picture plane on the display unit initially having the specified color fades in.
  • the data change signal shows specified colors
  • the pallet data updating unit is adapted to gradually change values indicated by the pallet data for each of the specified colors so that a picture plane on the display unit fades out or fade in, with respect to only the specified colors.
  • the pallet data updating unit is adapted to replace the pallet data for each of the displayable colors with new pallet data so that a picture plane on the display unit fades out or fades in sequentially with respect to each of the displayable colors.
  • a display control device 100 shown in FIG. 1 includes a controller 101, a picture data storage unit 102, a color pallet unit 103, a pallet data updating unit 104, and a signal conversion circuit 105.
  • the controller 101 generates a data change signal S DC , from a control signal S C supplied from an external device (not shown), such as a host computer.
  • the picture data storage unit 102 stores picture data D PIC .
  • the color pallet unit 103 stores pallet data D P corresponding to a plurality of displayable colors beforehand.
  • the pallet data D is read from the color pallet unit 103 in accordance with the picture data D PIC read from the picture data storage unit 102.
  • the pallet data updating unit 104 updates some or all of the pallet data D P on the basis of the data change signal S DC .
  • the signal conversion circuit 105 converts the pallet data D P output from the color pallet unit 103 into a display signal S D , and outputs it to a display D, such as a CRT (Cathode Ray Tube) display device, a LCD (Liquid Crystal Display) device and so on.
  • a display D such as a CRT (Cathode Ray Tube) display device, a LCD (Liquid Crystal Display) device and so on.
  • the controller 101 In response to the control signal S C , the controller 101 outputs the data change signal S DC to the pallet data updating unit 104.
  • the pallet data updating unit 104 gradually updates some or all of the pallet data D P stored in the color pallet unit 103 in accordance with the data change signal S DC .
  • the picture data storage unit 102 outputs the picture data D PIC to the color pallet unit 103.
  • the color pallet unit 103 outputs, to the signal conversion circuit 105, the pallet data D P which has been partially or all updated in accordance with the picture data D PIC .
  • the signal conversion circuit 105 converts the pallet data D P into the display signal S D , and outputs it to the display unit D. In this manner, the display on the display unit D is gradually changed in accordance with the updating of the pallet data D P .
  • FIG. 2 is a block diagram showing a basic structure of the display control device of the present invention.
  • a display control device shown in FIG. 2 includes a microcomputer 10, a picture controller 11, a video random access memory 12 (hereinafter simply referred to as a VRAM), a color pallet 13 and a digital-to-analog converter 14 (hereinafter simply referred to as a D/A converter).
  • the microcomputer 10 generates display control data D DC for controlling the entire display control device and update control data D PC for updating color pallet data, which will be described later in detail.
  • the picture controller 11 reads picture data D PIC consisting of, for example, eight bits from the VRAM 12 in response to receipt of the display control data D DC , and outputs it to the color pallet 13.
  • the color pallet 13 In response to receipt of the picture data D PIC , the color pallet 13 outputs pallet data D P consisting of, for example, six bits, to the D/A converter 14 for each of red (R), green (G) and blue (B).
  • the microcomputer 10 outputs the update control data D PC , to the color pallet 13.
  • the pallet data D P stored in the color pallet 13 is updated so that it is replaced by pallet data indicated by the update control data D PC .
  • the D/A converter 14 converts the pallet data D P for each of R, G and B into analog signals S respectively related to R, G and B.
  • the analog signals S are then output to the display unit D shown in FIG. 1.
  • the microcomputer 10 receives, from an external device, a signal indicating the execution of a fade-output process. In response to receipt of this signal, the microcomputer 10 reads, from the color pallet 13, pieces of original pallet data (pallet data before the fade-out operation) P R0 to P R255 , P G0 to P G255 and P B0 to P B255 respectively related to R, G and B (step S1). Further, the microcomputer 10 stores the above pallet data pieces into a pallet data area (not shown) (step S2) formed in a built-in memory of or an external memory coupled to the microcomputer 10.
  • the microcomputer 10 increments the second count value j by 1 (step S7), and determines whether or not the second count value j is equal to 256, which is a maximum number of simultaneously displayable colors (step S8).
  • the microcomputer 10 makes the flow return to step S6, and executes a sequence consisting of the steps S6 to S8.
  • the microcomputer 10 controls the color pallet 13 so that the pallet data pieces P Rj , P Gj and P Bj generated in step S6 are set and stored in the color pallet 13 (step S9). Hence, parts on the picture plane displayed using the original pallet data before the updating are changed so that they have colors based on the updated pallet data.
  • step S6a is carried out in lieu of step S6 shown in FIG. 3.
  • FIG. 5 shows a fade-out process of the second embodiment of the present invention.
  • steps which are the same as those shown in FIG. 3 carry the same step numbers, and a description thereof will be omitted.
  • step S6b is carried out in lieu of step S6 shown in FIG. 3.
  • the pallet data pieces respectively change by 1/63 of times the respective original pallet data pieces each time the above operations are respectively carried out.
  • the pallet data pieces may be unchanged after the above operations are carried out because of discarding.
  • the display fades out on the basis of the updated pallet data, such that the fade out process can be completed simultaneously with respect to the entire display plane.
  • FIG. 6 shows a fade-in process of the second embodiment of the present invention.
  • steps which are the same as those shown in FIG. 5 carry the same step numbers, and a description thereof will be omitted.
  • step S6c is carried out in lieu of step S6b shown in FIG. 5.
  • the pallet data pieces respectively change by 1/63 times of the respective original pallet data pieces each time the above operations are respectively carried out.
  • the pallet data pieces may be unchanged after the above operations are carried out because of discarding.
  • the display fades in on the basis of the updated pallet data, such that the fade out process can be completed simultaneously with respect to the entire display plane.
  • the third embodiment of the present invention executes a fade-out/fade-in operation in which the display fades out to predetermined colors and fades in from predetermined colors.
  • FIGS. 7 and 8 show a fade-out process of the third embodiment of the present invention.
  • steps which are the same as those shown in FIG. 3 carry the same step numbers, and a description whereof will be omitted.
  • step S11 is provided between the steps S2 and S3 shown in FIG. 3.
  • steps S12 to S14 are carried out in lieu of step S6 shown in FIG. 3.
  • step S11 the microcomputer 10 reads, from an external memory (not shown for the sake of convenience) coupled to the microcomputer 10, pallet data pieces P Rs , P Gs and P Bs . Then, the microcomputer 10 executes a sequence consisting of the steps S3 to S5, and then compares the pallet data pieces P Rj , P Gj and P Bj with the respective pallet data pieces P Rs , P Gs and P Bs (step S12).
  • the fade-in process of the third embodiment of the present invention can be performed in the similar manner as the above-mentioned fade-out process.
  • the fade-out/fade-in process is carried out for only color or colors specified beforehand, while the fade-out/fade-in process is carried out for all the simultaneously displayable colors in each of the first, second and third embodiments of the present invention.
  • the microcomputer 10 used in the fourth embodiment is adapted to specify the identification number of each color (color number) which is the subject of the fade- out/fade-in process.
  • the fade-out/fade-in process is not carried out for the other colors. For example, display colors having color numbers (k) 10, 11 and 15 among the 256 color numbers are specified by the microcomputer 10.
  • the microcomputer 10 initially sets the color number k to zero (step S20).
  • the microcomputer 10 determines whether or not the color of pallet data P RK , P GK , P BK corresponding to the current color number k is specified beforehand as a display color to which the fade-in/fade-out process is to be performed (step S21).
  • the microcomputer 10 executes a fade-out/fade-in operation (step S22).
  • step S22 The fade-out or fade-in operation is performed in step S22 in such a manner that the fade-out/fade-in process in the aforementioned first, second or third embodiment is carried out for only the colors specified by the color numbers. Then, the microcomputer 10 executes step S23. For the colors other than the colors specified by the color numbers, the microcomputer 10 skips the fade-out/fade-in operation executed in step S22.
  • the microcomputer 10 adds 1 to the color number k (step S23), and determines whether or not k is equal to 256 (step S24). When the result of the above determination at the step S24 is YES, the microcomputer 10 terminates the process. When the result of the determination is NO, the microcomputer 10 returns to step S21, and executes a sequence consisting of the steps S21 to S24.
  • the fade-out/fade-in operation for only the specified colors.
  • the present invention is applied to the display of a "KARAOKE" device, which shows a background picture plane having colors different from colors of words of songs superimposed thereon, the fade-out/fade-in process is independently carried out for the background picture plane and the words. More specifically, if 250 colors among the 256 simultaneously displayable colors are used for the background picture plane, and the remaining 6 colors are used for the words superimposed on the background picture plane, the display control device can make the background picture fade out while keeping the 6 colors of the words as they are.
  • the fade in process of the fourth embodiment of the present invention can be performed in the similar manner as the above-mentioned fade-out process.
  • FIGS. 10 and 11 A description will now be given, with reference to FIGS. 10 and 11, of a fifth embodiment of the present invention, in which the fade-out/fade-in process is sequentially carried out for each of pallet data pieces. More specifically, the pallet data pieces are sequentially set to the respectively specified colors, and the picture plane on the display fades out so that it finally has the colors specified. The pallet data pieces are also sequentially changed from the specified colors to the original colors, and the picture plane on the display fades in so that it finally has the original colors.
  • FIG. 10 shows a fade-out process of the fifth embodiment of the present invention.
  • the microcomputer 10 reads colors to be displayed after the fade-out process from an external storage device (not shown for the sake of convenience) (step S30).
  • the microcomputer 10 sets the count value i to zero (step S31).
  • the microcomputer 10 adds 1 to the count value i so that the count value i is updated (step S34).
  • the microcomputer 10 determines whether or not the count value i is equal to 256 (step S35).
  • the microcomputer 10 makes the flow return to step S32, and repeatedly carries out a sequence consisting of the steps S33 to S35.
  • the microcomputer 10 ends the fade-out process. In this manner, the display colors are sequentially replaced by the specified colors, and the entire picture plane on the display finally has the specified colors.
  • FIG. 11 shows a fade-in process of the fifth embodiment of the present invention.
  • the microcomputer 10 reads, from the color pallet 13, the original pallet data pieces (pallet data pieces before the fade-in process) P R0 to P R255 , P G0 to P G255 , and P B0 to P B255 (step S40), and stores them in a pallet data area formed therein or in an external memory (step S41).
  • each of the pallet data pieces indicates a value between 1 and 63 (this corresponding to six bits).
  • the microcomputer 10 sets the value 256 to the count value i (step S42). Subsequently, the microcomputer 10 subtracts 1 from the count value i so that the count value i is updated (step S43).
  • the hue, brightness and/or saturation on the picture plane can be easily changed without a specific circuit such as a luminance adjustment circuit. As a result, it is easy to execute the fade-out/fade-in process according to the present embodiments.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Studio Circuits (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Image Processing (AREA)
  • Digital Computer Display Output (AREA)
  • Image Generation (AREA)
  • Processing Of Color Television Signals (AREA)
EP92306235A 1991-07-12 1992-07-07 Display control device Withdrawn EP0526989A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP3172123A JPH0522658A (ja) 1991-07-12 1991-07-12 表示制御装置
JP172123/91 1991-07-12

Publications (2)

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EP0526989A2 true EP0526989A2 (en) 1993-02-10
EP0526989A3 EP0526989A3 (enrdf_load_stackoverflow) 1994-02-02

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EP92306235A Withdrawn EP0526989A2 (en) 1991-07-12 1992-07-07 Display control device

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JP (1) JPH0522658A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4408990A1 (de) * 1993-03-19 1994-09-22 Fujitsu Ltd Verfahren und Vorrichtung zur Verwaltung von Farbdaten
US8994744B2 (en) 2004-11-01 2015-03-31 Thomson Licensing Method and system for mastering and distributing enhanced color space content
US9219898B2 (en) 2005-12-21 2015-12-22 Thomson Licensing Constrained color palette in a color space

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5598516A (en) * 1993-06-21 1997-01-28 Namco Ltd. Image synthesizing system and video game apparatus using the same
WO2016166826A1 (ja) * 2015-04-15 2016-10-20 三菱電機株式会社 表示制御装置、及び、コントロール端末

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02228695A (ja) * 1989-03-01 1990-09-11 Matsushita Electric Ind Co Ltd カラー合成装置
JPH0343787A (ja) * 1989-07-12 1991-02-25 Hitachi Ltd 画像表示装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4408990A1 (de) * 1993-03-19 1994-09-22 Fujitsu Ltd Verfahren und Vorrichtung zur Verwaltung von Farbdaten
US5537579A (en) * 1993-03-19 1996-07-16 Fujitsu Limited Method and apparatus for managing color data
DE4408990C2 (de) * 1993-03-19 1999-07-08 Fujitsu Ltd Verfahren zur Verwaltung von Farbdaten
US8994744B2 (en) 2004-11-01 2015-03-31 Thomson Licensing Method and system for mastering and distributing enhanced color space content
US9219898B2 (en) 2005-12-21 2015-12-22 Thomson Licensing Constrained color palette in a color space

Also Published As

Publication number Publication date
EP0526989A3 (enrdf_load_stackoverflow) 1994-02-02
JPH0522658A (ja) 1993-01-29

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