JP2007072036A - Display control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the use efficiency of image data save and storage section and the hit ratio of the image data saved therein. <P>SOLUTION: The image data save and storage section 3 includes a first save area 3a for preferentially storing the image data of a screen highest in display frequency, and a second save area 3b for temporarily and preferentially storing the image data of a screen next highest in display frequency. A display image controller 4 transfers and stores the image data of the present display screen into the first save area 3a when the present display frequency is higher as compared to the maximum display frequency of the image data stored in the first save area 3a. When the present display frequency is lower than the same, the controller compares the present display frequency with the next highest display frequency of the image data stored in the second save area 3b and when the present display frequency is higher than the same, the controller transfers the image data of the present display screen to the second save area 3b and stores the same. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a display control apparatus that performs display control of various devices such as home appliances and OA devices.

  In recent years, GUI (Graphical User Interface) operation methods that have become mainstream in personal computers and workstations have been introduced to improve the operability of various devices such as home appliances and OA devices. The movement to try is becoming active.

  However, in general, it is necessary to display various components such as windows, buttons, icons, etc. on the operation screen by GUI operation, and display image data of each component and font data for displaying various types of characters. A lot of data such as etc. must be handled. As a result, there is a problem that the processing load for creating the screen components increases and the screen display becomes slow.

  To solve this problem, when the screen transitions, store the image data that has been temporarily erased in the image data save area, and copy the image data from the image data save area when redisplaying. Thus, there is a method for increasing the display speed (see, for example, Patent Document 1).

Further, as a condition for temporarily saving the image data, it is proposed to increase the screen transition speed while adapting to the operation tendency by the user by determining the priority order based on the transition probability (frequency) (for example, Patent Document 2).
Japanese Patent Laid-Open No. 7-84562 (page 3, FIG. 1) JP-A-9-319538 (page 8, FIGS. 10-11)

  However, when only the transition probability (frequency) is used as an element for determining the priority order, the image data of a screen with a high display frequency tends to reside in the image data saving area. As a result, there is a problem that the probability that the image data of the transition source screen that is used relatively frequently is not stored in the image data saving area is high, and the display speed of the screen transition is slow.

  In addition to the save area whose priority is determined by the transition probability (frequency), if an area for saving the image data of the transition source screen is prepared, the display frequency of the image data of the transition source screen is low. However, since the save area is consumed, there is a problem that the probability that the image data in the save area is used is lowered.

The display control device according to the present invention is:
A display image data storage unit for temporarily storing image data to be displayed on the display unit;
A first image data saving area for temporarily storing image data of a screen with the highest display frequency for a plurality of screens classified by various information and functions, and smaller than the highest display frequency An image data saving and storing unit having a second image data saving area for temporarily storing image data of a screen having a display frequency higher than the display frequency of other screens.
The display image data storage unit is controlled to transfer and display image data on the display unit, and when there is a display screen change command, the current display screen display frequency is stored in the first image data saving area. When the image data is larger than the maximum display frequency of the displayed image data, the image data of the current display screen in the display image data storage unit is transferred and stored in the first image data saving area. The display frequency of the display screen is compared with the next-point display frequency of the image data stored in the second image data saving area, and when it is larger, the image data of the current display screen in the display image data storage unit is The image data on the display screen after being transferred and stored in the second image data saving area is changed to the image data. A display image control unit that transfers the image data to the display image data storage unit when it exists in the data saving storage unit, and generates and stores necessary image data in the display image data storage unit when it does not exist It has been configured.

  Here, regarding the maximum display frequency, when the number of image data temporarily stored in the first image data saving area is only 1, the first highest display frequency among the plurality of image data displayed in the past is set. Point to. Further, when the number of image data to be temporarily stored is 2 or more, it indicates a display frequency that is sequentially increased by the number from the maximum of a plurality of image data displayed in the past. The next point display frequency refers to one or several of the next highest display frequencies except for the image data temporarily stored in the first image data saving area among the plurality of image data displayed in the past. .

In this configuration, the display image control unit controls the display of the image data on the display unit, and the image data to be displayed is stored in the image data saving storage unit (the first image data saving area or the second image data saving area). In some cases, the image data is read from the image data, transferred and stored in the image data saving / storage unit, and further transferred and displayed on the display unit. When there is a display screen change command, the display frequency of the current display screen (that is, the current display frequency of the image data screen temporarily stored in the display image data storage unit) ρ _{i is set} to the first compared to the maximum display frequency [rho _a image data stored in the image data saving area, when the current display frequency [rho _i is greater than the maximum display frequency [rho _a is the image of the current display screen of the display image data storage unit Data is transferred and stored in the first image data saving area. That is, replacement is performed as image data corresponding to the maximum display frequency ρ _a . Further, when the present display frequency [rho _i is smaller than the maximum display frequency [rho _a is runner-up display frequency of the image data stored in the currently displayed frequency [rho _i of the current display screen to the second image data saving area [rho _b If the current display frequency ρ _i is greater than the next point display frequency ρ _b , the image data of the current display screen in the display image data storage unit is transferred and stored in the second image data saving area. In other words, it performs interchanging the image data corresponding to the next mark display frequency [rho _b.

  Therefore, according to the present invention, the image data saving and storing unit preferentially temporarily stores image data of a screen having the highest display frequency for a plurality of screens classified by various information and functions. And an image data saving area and a second image data saving area for temporarily storing image data of a screen having a display frequency smaller than the largest display frequency but higher than the display frequency of other screens. In the first image data saving area, the image data is saved with priority given to the high display frequency in the past history, regardless of whether or not the display has been performed recently or relatively recently. In the second image data saving area, the image data of the transition source screen is saved as much as possible with priority given to the latest or relatively recent display. Since the division is performed in the first image data saving area and the second image data saving area, when there is a display screen change command, the image data on the changed display screen is stored in the image data saving storage unit. It is possible to improve the hit rate when hitting in the first image data saving area or the second image data saving area.

  In the above, the display image control unit stores the display image data when the display frequency of the current display screen is equal to the maximum display frequency of the image data stored in the first image data saving area. There is a mode in which transfer storage processing of the image data of the current display screen in the unit to the first image data saving area or the second image data saving area is stopped. Thereby, processing efficiency can be improved.

  Further, in the above, when the display image control unit compares the display frequency of the current display screen with the next display frequency of the image data stored in the second image data saving area, the display image control unit There is a mode in which transfer storage processing of the image data on the current display screen in the image data storage unit to the second image data saving area is stopped. Thereby, processing efficiency can be further improved.

  In the above, the display image control unit increases the ratio of the second image data saving area in the image data saving storage unit when the screen transition to the transition source screen occurs continuously. There is an aspect of being configured. Then, when screen transitions to the transition source screen occur continuously, the ratio of the second image data saving area in the image data saving storage unit is increased according to the number of times of transition. It shall be.

  According to this, in the case where screen transitions to the transition source screen occur continuously, by increasing the ratio of the second image data saving area in the image data saving storage unit, several next point display frequencies are displayed. It is possible to save more image data of the transition source screen having. Therefore, even if a screen transition that continuously returns to the transition source screen occurs, the probability that the return destination (transition destination) screen hits in the image data saving storage unit can be increased.

  Further, in the above, the display image control unit obtains a probability of returning from the transition destination screen to the transition source screen, and if the probability is higher than a reference value, the image data of the transition source screen is given the highest priority. There is a mode in which the image data is saved in the image data saving area.

  According to this, when the probability of returning from the transition destination screen to the transition source screen in the screen transition is higher than the reference value, the image data of the transition source screen is always stored in the second image data saving area. Even if a transition to the transition source screen occurs frequently, the image data of the return destination (transition destination) screen can always be hit in the image data saving storage unit.

  According to the present invention, the image data saving and storing unit preferentially temporarily stores image data of a screen having the highest display frequency for a plurality of screens classified by various information and functions. A save area, and a second image data save area for temporarily storing image data of a screen having a display frequency smaller than the largest display frequency but greater than the display frequency of other screens, Regardless of whether or not the first image data saving area has been used for the most recent or relatively recent display, the image data is saved with priority given to the high display frequency in the past history, while the second In the first image data saving area, the first use is to save as much image data of the transition source screen as possible with priority given to the latest or relatively recent display. Since the image data saving area and the second image data saving area are used, when the display screen change command is issued, the image data of the changed display screen is stored in the image data saving storage unit (first image It is possible to improve the hit rate when hitting in the data saving area or the second image data saving area.

  Embodiments of a display control apparatus according to the present invention will be described below in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is a block diagram showing a schematic configuration of a display control apparatus according to Embodiment 1 of the present invention. In FIG. 1, 1 is a display unit, 2 is a display image data storage unit, 3 is an image data saving storage unit, and 4 is a display image control unit. The display unit 1 is a user interface for displaying the image data transferred and stored in the display image data storage unit 2. The image data save storage unit 3 is an area for temporarily saving the image data of the transition source screen at the time of screen transition, and is configured in a storage device such as a VRAM.

  FIG. 2 is a configuration diagram of the image data saving and storing unit 3 in the first embodiment. The image data saving storage unit 3 includes a first image data saving area 3a for temporarily storing image data of one or a plurality of screens having the highest display frequency for a plurality of screens, and the highest display frequency. Is divided into a second image data saving area 3b for temporarily storing image data of one or more screens with a display frequency of the next point which is smaller than the display frequency of other screens, but is temporarily managed. Is done.

The display image control unit 4 controls the display image data storage unit 2 to transfer and display image data on the display unit 1. Further, the display image control unit 4 has already stored the display frequency (current display frequency) ρ _{i of the} current display screen that is the transition source at the time of the display screen change command in the first image data saving area 3a. When the former ρ _i is larger than the latter ρ _a compared to the maximum display frequency ρ _{a of the} screen image data, the image data of the current display screen in the display image data storage unit 2 is stored in the first image data saving area 3a. And transfer the stored image data. When the former ρ _i is less than or equal to the latter ρ _a , the current display frequency ρ _i is compared with the next display frequency ρ _{b of the} image data stored in the second image data saving area 3b, and the former ρ _i when is greater than the latter [rho _b performs image data of the current display screen of the display image data storage unit 2 transfers stored sushi in the second image data saving area 3b, and replacement of the stored image data. This is because the image data saving storage unit 3 preferentially stores the image data of the past transition source and the frequently displayed screen, so that the image data of the next transition destination is the image data saving storage. This is to increase the probability of hitting in part 3. When the image data of the display screen after the change according to the display screen change command is present in the image data saving storage unit 3 (first image data saving area 3a or second image data saving area 3b), the image data Is transferred to and stored in the display image data storage unit 2, and when it does not exist, necessary image data is generated and stored in the display image data storage unit 2. The display image control unit 4 calculates and stores the display frequency by counting the frequency (display count) of screen display for all screens used in display devices such as home appliances and OA devices.

  Next, the operation of the display control apparatus of the present embodiment configured as described above will be described with reference to the flowchart of FIG. The control subject of this flowchart is the display image control unit 4, and when there is an instruction to change the display screen, the routine shown in the flowchart of FIG. 3 is started.

First, in step S1, the current display frequency ρ _i of the current display screen image is acquired. Next, in step S2, the maximum display frequency ρ _a of the image data in the first image data saving area 3a is acquired. Next, in step S3, it is determined whether or not the current display frequency ρ _i acquired in step S1 is greater than the maximum display frequency ρ _a of the image data in the first image data saving area 3a acquired in step S2. When the current display frequency ρ _i is larger than the maximum display frequency ρ _a , the process proceeds to step S4, where the image data with the lowest display frequency in the first image data saving area 3a is deleted and stored in the display image data storage unit 2. The image data of the current display screen is transferred and stored in the first image data saving area 3a, and the process proceeds to step S8.

On the other hand, if the current display frequency ρ _i is less than or equal to the maximum display frequency ρ _a of the image data in the first image data save area 3a as determined in step S3, the process proceeds to step S5 and the second image data save area 3b is set. The next point display frequency ρ _b of the image data is acquired. Next, in step S6, it is determined whether or not the current display frequency ρ _i is greater than the next-point display frequency ρ _b of the image data in the second image data saving area 3b. When the current display frequency ρ _i is larger than the next-point display frequency ρ _b of the image data in the second image data saving area 3b, the process proceeds to step S7, where the image data of the current display screen in the display image data storage unit 2 is displayed. Are transferred and stored in the second image data saving area 3b. When the current display frequency ρ _i is equal to or lower than the next display frequency ρ _b of the image data in the second image data saving area 3b, the process skips step S7 and proceeds to step S8.

Note that in the magnitude comparison between the maximum display frequency ρ _a of the image data in the first image data saving area 3 _a and the next-point display frequency ρ _b of the image data in the second image data saving area 3 _b , ρ _a > ρ _b . The current display frequency ρ _i is compared with ρ _a and ρ _b .
ρ _a <ρ _i ………… Step S3 → Step S4
ρ _b <ρ _i ≦ ρ _a ... Step S3 → Step S5 → Step S6 → Step S7
ρ _i ≦ ρ _b ………… Step S6 → Step S8
It becomes. In the display screen change command, when the current display frequency ρ _i is considerably large and ρ _a <ρ _i , the image data of the current display screen is transferred and stored in the first image data saving area 3a. When the current display frequency ρ _i is medium and ρ _b <ρ _i ≦ ρ _a is satisfied, the image data of the current display screen is transferred and stored in the second image data saving area 3b. If the current display frequency ρ _i is quite small and ρ _i ≦ ρ _b , the image data on the current display screen is transferred to both the first image data saving area 3a and the second image data saving area 3b. There is nothing.

  Next, in step S8, it is determined whether or not the display image at the transition destination exists in the image data saving storage unit 3 (the first image data saving area 3a or the second image data saving area 3b). In step S 9, the display image data at the transition destination is read from the image data saving / storage unit 3 and transferred and stored in the display image data storage unit 2. On the other hand, when the transition destination display image does not exist in the image data saving storage unit 3, the process proceeds to step S 10, and the transition destination display image data is created in the display image data storage unit 2.

  Next, in step S <b> 11, a display image that is the content of the display image data storage unit 2 is displayed on the display unit 1.

  Next, a specific operation will be described using a screen transition example of the TV apparatus shown in FIG. The screen configuration includes a TV screen P1, an EPG screen P2, a reservation screen P3, a currently viewable program list screen P4, and a program details display screen P5. FIG. 5 shows the display frequency at a certain point in time for each screen shown in FIG.

FIG. 6 shows the state of the image data saving and storing unit 3 when the screen configuration of FIG. 4 is used and the screen P4 → P5 → P3 → P4 is changed in this order. Since the display frequency is high, the EPG screen P2 is stored in the first image data saving area 3a (ρ _a = 10000). It is assumed that the viewable program list screen P4 that is the current transition source is stored in the second image data saving area 3b when the viewable program list screen P4 transitions to the program detail display screen P5.

Next, consider a case where the program detail display screen P5 is changed to the reservation screen P3. That is, consider the transition from FIG. 6A to FIG. In this case, the image data of the current display screen is the program detail display screen P5, and the transition destination is the reservation screen P3. The current display frequency ρ _i of the currently displayed program detail display screen P5 is 5000. The maximum display frequency ρ _a of the EPG screen P2 in the first image data saving area 3a is 10,000. The runner-up display frequency [rho _b viewable program list screen P4 in the second image data saving area 3b is 300. The current display frequency ρ _i (= 5000) of the currently displayed program detail display screen P5 is smaller than the maximum display frequency ρ _a (= 10000) of the EPG screen P2 in the first image data saving area 3a. Since the current display frequency ρ _i (= 5000) of the program detail display screen P5 is larger here than the next-point display frequency ρ _b (= 300) of the viewable program list screen P4 in the second image data saving area 3b. Then, the image data of the currently displayed program detail display screen P5 is transferred and stored in the second image data saving area 3b.

Next, consider a case where the reservation screen P3 is changed to the viewable program list screen P4. That is, consider the transition from FIG. 6B to FIG. In this case, the image data of the current display screen is the reservation screen P3, and the transition destination is the viewable program list screen P4. The current display frequency ρ _i of the reservation screen P3 for current display is 70. The runner-up display frequency [rho _b of the program detail screen P5 in the second image data saving area 3b is 5000. The current display frequency ρ _i (= 70) of the currently displayed reservation screen P3 is smaller than the maximum display frequency ρ _a (= 10000) of the EPG screen P2 in the first image data saving area 3a. The current display frequency ρ _i (= 70) of the screen P3 is smaller than the next-point display frequency ρ _b (= 5000) of the program detail display screen P5 in the second image data saving area 3b. The image data on the screen P3 is not transferred to the second image data saving area 3b. Therefore, the image data of the program detail display screen P5 remains stored in the second image data saving area 3b.

  As described above, in the second image data saving area 3b, image data of a screen that is a past transition source and has a high display frequency is stored.

FIG. 7 shows the state of the image data saving / storing unit 3 when the program details display screen P5 → P2 → P3 is changed in the order shown in FIG. Since the display frequency is high, the EPG screen P2 is stored in the first image data saving area 3a (ρ _a = 10000). It is assumed that the program detail display screen P5 that is the current transition source is stored in the second image data saving area 3b when the program detail display screen P5 transitions to the EPG screen P2.

Next, consider the case where the EPG screen P2 changes to the reservation screen P3. That is, consider the transition from FIG. 7 (a) to FIG. 7 (b). In this case, the image data of the current display screen is the EPG screen P2, and the transition destination is the reservation screen P3. The current display frequency ρ _i of the currently displayed EPG screen P2 is 10,000. The runner-up display frequency [rho _b of the program detail screen P5 in the second image data saving area 3b is 5000. The current display frequency ρ _i (= 10000) of the currently displayed EPG screen P2 is the same as the maximum display frequency ρ _a (= 10000) of the EPG screen P2 in the first image data saving area 3a, and the EPG screen P2 Is already stored in the first image data saving area 3a, the image data of the currently displayed EPG screen P2 is not transferred to the second image data saving area 3b. Therefore, the image data of the program detail display screen P5 remains stored in the second image data saving area 3b.

  As described above, it is possible to prevent two or more pieces of image data of the same screen from being stored in the image data saving storage unit 3 and to improve the usage efficiency of the image data saving storage unit 3.

  According to the present embodiment, the image data saving and storing unit 3 preferentially stores image data of a screen having the highest display frequency for a plurality of screens classified according to various types of information and functions. Image data saving area 3a and a second image data saving area 3b for preferentially storing image data of a screen having a display frequency smaller than the highest display frequency but higher than the display frequency of other screens. The first image data saving area 3a saves the image data with priority given to the high display frequency in the past history, regardless of whether it has been displayed recently or relatively recently. On the other hand, the second image data saving area 3b saves as much image data of the transition source screen as possible with priority given to the latest or relatively latest display. Is used in the first image data saving area 3a and the second image data saving area 3b. Therefore, when there is a display screen change command, the image data on the changed display screen is displayed as an image. It is possible to improve the hit rate when hitting in the data saving storage unit 3 (first image data saving area 3a or second image data saving area 3b).

(Embodiment 2)
The configuration of the display control apparatus according to the second embodiment of the present invention is the same as that shown in FIG. 1 for the first embodiment.

FIG. 8 is a configuration diagram of the image data saving and storing unit in the second embodiment of the present invention. The image data saving storage unit 3 is divided and managed into a first image data saving area 3a and a second image data saving area 3b as in the first embodiment. 3a is configured to preferentially store the image data for the four screens with the display frequency for the plurality of screens from the first place to the fourth place, and the second image data save area 3b , to store the first image data saving display frequency of runner-up image data stored in the area 3a (runner-up display frequency) [rho _b only one screen image data to temporarily priority It is configured. However, this is a principle at the time of power-on or reset, and the first image data saving area 3a and the second image data saving area 3b have variable area sizes depending on the use situation.

  FIG. 9 is an example of screen transition for explaining the second embodiment.

  FIG. 10 is a state diagram of the image data saving and storing unit when the transition is made in the order of screen D → C → B → A in the second embodiment.

FIG. 10A shows the state of the image data saving storage unit 3 when the screen A is returned to the screen C after the transition from the screen A → B → C → D in FIG. 9. In this case, the first image data saving area 3a stores four pieces of image data whose display frequencies are from the first place to the fourth place, and the second image data saving area 3b is the next point display frequency. image data of the screen D of the [rho _b are stored.

  Next, consider a case where the state of FIG. 10A transitions to the state of FIG. That is, when returning from the screen C to the screen B, the display image control unit 4 recognizes that the screen transition to the transition source screen has occurred continuously. This is because the screen D has returned from the screen D to the screen C immediately before, and then the screen C has returned to the screen B. The display image control unit 4 that has recognized that the screen transition to the transition source screen has occurred continuously increases the ratio of the second image data saving area 3b in the image data saving storage unit 3 to thereby increase the second image. Control is performed so that more image data can be stored in the data saving area 3b. In this embodiment, the storage area for one image data is increased.

  Next, consider a case where the state of FIG. 10B transitions to the state of FIG. That is, as a result of returning from the screen B to the screen A, the display image control unit 4 recognizes that the screen transition to the transition source screen has occurred continuously, and the second image data saving area in the image data saving storage unit 3 The ratio of 3b is further increased, and the second image data saving area 3b is further expanded so that more image data can be stored.

  After that, when the screen A → E → F → G is transitioned and when the screen F → E → A and the transition source screen are continuously returned, the image data of the transition source screen is stored as image data as shown in FIG. The state is stored in the unit 3.

  Note that the second image data in the image data saving / storing unit 3 when the screen does not return to the transition source screen for a certain time or when the screen does not return to the transition source screen within a certain number of screen transitions. The ratio of the save area 3b is restored to the original state as shown in FIG.

  As described above, when screen transitions back to the transition source screen occur continuously, by increasing the ratio of the second image data saving area 3b in the image data saving storage unit 3, several next point display frequencies are displayed. It is possible to save more image data of the transition source screen having. Therefore, even if screen transitions that continuously return to the transition source screen occur, it is possible to increase the probability that the image data of the return destination (transition destination) screen will hit in the image data save storage unit 3.

  In this embodiment, the number of image data that can be stored in the first image data saving area 3a is four, and the number of image data that can be stored in the second image data saving area 3b is one. The present invention is not limited to this number.

(Embodiment 3)
The configuration of the display control apparatus in the third embodiment of the present invention is the same as that shown in FIG. 1 in the case of the first embodiment. In addition, as for the configuration of the image data saving and storing unit 3, the configuration of FIG.

  If the probability of returning from the transition destination screen to the transition source screen is higher than the reference value, the display image control unit 4 transfers the image data of the current display screen that is the transition source with the highest priority to the second image data saving area 3b. If the probability of returning from the transition destination screen to the transition source screen is less than the reference value, transfer storage of image data is determined by the same method as in the first embodiment. The probability of returning from the transition destination screen to the transition source screen may be statically determined in advance, or the number of times of returning to the transition source screen is counted, and the transition source screen is shifted from the transition destination screen based on the count result. The probability of returning to the screen may be calculated dynamically.

  Next, the operation of the display control apparatus of the present embodiment configured as described above will be described with reference to the flowchart of FIG. The display image control unit 4 activates the routine shown in the flowchart of FIG. 12 when there is an instruction to change the display screen.

First, in step S21, the current display frequency ρ _i of the current display screen image is acquired. Next, in step S22, the maximum display frequency ρ _a of the image data in the first image data saving area 3a is acquired. Next, in step S23, it is determined whether or not the current display frequency ρ _i acquired in step S21 is greater than the maximum display frequency ρ _a of the image data in the first image data saving area 3a acquired in step S22. When the current display frequency ρ _i is larger than the maximum display frequency ρ _a , the process proceeds to step S24, where the image data with the lowest display frequency in the first image data saving area 3a is deleted, and the image data of the current display screen is stored. The data is transferred and stored in the first image data saving area 3a, and the process proceeds to step S30.

On the other hand, if it is determined in step S23 that the current display frequency ρ _i is equal to or less than the maximum display frequency ρ _a , the process proceeds to step S25, and the probability of returning from the transition destination screen to the transition source screen is acquired. Next, in step S26, it is determined whether or not the probability of returning from the transition destination screen to the transition source screen is higher than a reference value. If the result is affirmative in this determination, the process skips to step S29, and the image data of the current display screen is transferred and stored in the second image data saving area 3b.

On the other hand, when the result of step S26 is negative the process proceeds to step S27, as in the case of the first embodiment, obtains the next mark display frequency [rho _b of the image data of the second image data saving area 3b. Next, in step S28, it is determined whether or not the current display frequency ρ _i is greater than the next point display frequency ρ _b of the image data in the second image data saving area 3b. When the current display frequency ρ _i is larger than the next point display frequency ρ _b , the process proceeds to step S29, and the image data of the current display screen is transferred and stored in the second image data saving area 3b. If the current display frequency ρ _i is equal to or lower than the next point display frequency ρ _b , the process skips step S29 and proceeds to step S30.

  Next, in step S30, it is determined whether or not the transition destination display image exists in the image data saving and storing unit 3. If it exists, the process proceeds to step S31, and the transition destination display image data is stored in the image data saving and storing unit 3. Is transferred and stored in the display image data storage unit 2. On the other hand, when the transition destination display image does not exist in the image data saving storage unit 3, the process proceeds to step S 32, and the transition destination display image data is created in the display image data storage unit 2.

  Next, in step S <b> 33, the display image which is the content of the display image data storage unit 2 is displayed on the display unit 1.

  Next, a specific operation will be described using a screen transition example of the TV apparatus shown in FIG. The screen configuration includes a standby screen Q1, a main menu screen Q2, a mail menu screen Q3, a mail creation screen Q4, a configuration menu screen Q5, an alarm setting screen Q6, and an alarm help screen Q7. FIG. 14 shows the display frequency at a certain point in time for each screen configured in FIG. 13 and the probability of returning from the transition destination screen to the transition source screen. In this example, the reference value of the probability of returning from the transition destination screen to the transition source screen is 80%, but the present invention is not limited to this value.

FIG. 15 shows the state of the image data saving and storing unit 3 when the screen configuration of FIG. 13 is used and the screen Q2 → Q5 → Q6 → Q7 is changed in this order. Since the display frequency is high, the standby screen Q1 is stored in the first image data saving area 3a (ρ _a = 10000). Consider a case where a transition is made from the configuration menu screen Q5 to the alarm setting screen Q6. That is, consider the transition from FIG. 15 (a) to FIG. 15 (b). In this case, the image data of the current display screen is the configuration menu screen Q5, and the transition destination is the alarm setting screen Q6. The current display frequency ρ _i of the currently displayed configuration menu screen Q5 is 100. The maximum display frequency ρ _a of the standby screen Q1 in the first image data saving area 3a is 10,000. The next point display frequency ρ _b of the main menu screen Q2 in the second image data saving area 3b is 8000. The current display frequency ρ _i (= 100) of the currently displayed configuration menu screen Q5 is smaller than the maximum display frequency ρ _a (= 10000) of the standby screen Q1 in the first image data saving area 3a. The probability of returning from the transition destination alarm setting screen Q6 to the configuration menu screen Q5 of the transition source is acquired. Since this probability is 40%, which is lower than the reference value 80%, the same processing as in the first embodiment is performed. As a result, the current display frequency ρ _i (= 100) of the currently displayed configuration menu screen Q5 is compared with the next point display frequency ρ _b (= 8000) of the main menu screen Q2 in the second image data saving area 3b. Since it is small here, the image data on the currently displayed configuration menu screen Q5 is not transferred to the second image data saving area 3b. Therefore, the image data of the main menu screen Q2 remains stored in the second image data saving area 3b.

Next, consider the transition from the alarm setting screen Q6 to the alarm help screen Q7. That is, consider the transition from FIG. 15 (b) to FIG. 15 (c). In this case, the image data of the current display screen is the alarm setting screen Q6, and the transition destination is the alarm help screen Q7. Since the current display frequency ρ _i (= 30) of the currently set alarm setting screen Q6 is smaller than the maximum display frequency ρ _a (= 10000) of the standby screen Q1 in the first image data saving area 3a, The probability of returning from the transition destination alarm help screen Q7 to the transition source alarm setting screen Q6 is acquired. Since this probability is 90% and is higher than the reference value 80%, the image data of the currently displayed alarm setting screen Q6 is transferred and stored in the second image data saving area 3b.

  As described above, when the probability of returning from the transition destination screen to the transition source screen in the screen transition is higher than the reference value, the image data of the transition source screen is always stored in the second image data saving area 3b of the image data saving storage unit 3. Will be stored. Therefore, even when a transition to the transition source screen occurs frequently, the image data of the return destination (transition destination) screen can be always hit in the image data saving storage unit 3.

  The display control device of the present invention is useful as a display control technique with a GUI operation method in home appliances, OA devices, and the like.

The block diagram which shows schematic structure of the display control apparatus in Embodiment 1-3 of this invention. 1 is a configuration diagram of an image data saving / storing unit according to Embodiment 1 of the present invention. The flowchart which shows operation | movement of the display control apparatus of Embodiment 1 of this invention. Example of screen transition of TV apparatus for explaining operation of display control apparatus according to embodiment 1 of the present invention Display frequency table of each screen at a certain point in the screen transition example in Embodiment 1 of the present invention State diagram of image data saving and storing unit at the time of screen transition according to the first embodiment of the present invention (part 1) State diagram of the image data saving and storing unit at the time of screen transition according to the first embodiment of the present invention (part 2) Configuration diagram of an image data saving and storing unit in Embodiment 2 of the present invention Screen transition example for explaining the operation of the display control apparatus according to the second embodiment of the present invention State diagram of image data saving and storing unit at the time of screen transition in embodiment 2 of the present invention (part 1) State diagram of the image data saving and storing unit at the time of screen transition according to the second embodiment of the present invention (part 2) The flowchart which shows operation | movement of the display control apparatus of Embodiment 3 of this invention. Example of screen transition of mobile phone device for explaining operation of display control device of embodiment 3 of present invention Table of the display frequency of each screen at a certain point in the screen transition example according to Embodiment 3 of the present invention and the probability of returning from the transition destination screen to the transition source screen State diagram of image data saving and storing unit at the time of screen transition according to Embodiment 3 of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Display part 2 Display image data storage part 3 Image data saving storage part 3a 1st image data saving area 3b 2nd image data saving area 4 Display image control part

Claims (6)

A display image data storage unit for temporarily storing image data to be displayed on the display unit;
A first image data saving area for temporarily storing image data of a screen with the highest display frequency for a plurality of screens classified by various information and functions, and smaller than the highest display frequency An image data saving and storing unit having a second image data saving area for temporarily storing image data of a screen having a display frequency higher than the display frequency of other screens.
The display image data storage unit is controlled to transfer and display image data on the display unit, and when there is a display screen change command, the current display screen display frequency is stored in the first image data saving area. When the image data is larger than the maximum display frequency of the displayed image data, the image data of the current display screen in the display image data storage unit is transferred and stored in the first image data saving area. The display frequency of the display screen is compared with the next-point display frequency of the image data stored in the second image data saving area, and when it is larger, the image data of the current display screen in the display image data storage unit is The image data on the display screen after being transferred and stored in the second image data saving area is changed to the image data. A display image control unit that transfers the image data to the display image data storage unit when it exists in the data saving storage unit, and generates and stores necessary image data in the display image data storage unit when it does not exist Display controller.   The display image control unit compares the current display frequency of the display screen with the maximum display frequency of the image data stored in the first image data saving area, and when the display frequency is equal, the display image data storage unit The display control device according to claim 1, configured to stop transfer storage processing of the image data of the display screen to the first image data saving area or the second image data saving area.   When the display image control unit compares the display frequency of the current display screen with the next-point display frequency of the image data stored in the second image data saving area, the display image control unit The display control device according to claim 1, wherein the display control device is configured to stop the process of transferring and storing the image data of the current display screen to the second image data saving area.   The display image control unit is configured to increase the ratio of the second image data saving area in the image data saving storage unit when screen transitions to the transition source screen occur continuously. The display control apparatus according to any one of claims 1 to 3.   The display image control unit increases the ratio of the second image data saving area in the image data saving storage unit according to the number of transitions when screen transitions to the transition source screen occur continuously. The display control apparatus according to claim 4, wherein the display control apparatus is configured to cause the display control apparatus to operate.   The display image control unit obtains a probability of returning from the transition destination screen to the transition source screen, and if the probability is higher than a reference value, the image data of the transition source screen is given the highest priority in the second image data saving area. The display control device according to claim 1, wherein the display control device is configured to transfer and store the display control device.

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