WO2016093125A1 - 表示制御装置、表示制御方法及び表示制御プログラム - Google Patents
表示制御装置、表示制御方法及び表示制御プログラム Download PDFInfo
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- WO2016093125A1 WO2016093125A1 PCT/JP2015/083876 JP2015083876W WO2016093125A1 WO 2016093125 A1 WO2016093125 A1 WO 2016093125A1 JP 2015083876 W JP2015083876 W JP 2015083876W WO 2016093125 A1 WO2016093125 A1 WO 2016093125A1
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- frame rate
- display control
- image data
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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
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
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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
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/08—Details of timing specific for flat panels, other than clock recovery
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2340/00—Aspects of display data processing
- G09G2340/04—Changes in size, position or resolution of an image
- G09G2340/0407—Resolution change, inclusive of the use of different resolutions for different screen areas
- G09G2340/0435—Change or adaptation of the frame rate of the video stream
Definitions
- the present invention relates to a display control apparatus that causes a display panel to display an image by switching at least two frame rates.
- Patent Document 1 the amount of motion of a plurality of frame data groups constituting video data is detected, and frame data subjected to double speed processing when the detected amount of motion is equal to or greater than a threshold value indicating a predetermined amount of motion.
- a threshold value indicating a predetermined amount of motion.
- Patent Document 1 since the technique disclosed in Patent Document 1 does not sufficiently reduce power consumption, there arises a problem that it is impossible to achieve both improvement in the image quality of a display image and reduction in power consumption.
- the present invention has been made in view of the above problems, and an object of the present invention is to provide a display control device capable of achieving both improvement in the image quality of display video and reduction in power consumption. is there.
- a display control device is a display control device that causes a display panel to display an image by switching at least two types of frame rates, and is supplied from the outside.
- An image data update determination unit that determines whether or not image data has been updated for each preset image update period, and a first frame rate setting unit that sets a frame rate according to the determination result of the image data update determination unit It is characterized by having.
- FIG. 1 is a schematic configuration block diagram of a display device according to Embodiment 1 of the present invention.
- 2A and 2B are timing charts showing data transfer timings in the display device shown in FIG. 1, wherein FIG. 1A shows a timing chart when the frame rate is 120 Hz, and FIG. 1B shows a timing chart when the frame rate is 60 Hz.
- FIG. 1A shows a timing chart when the frame rate is 120 Hz
- FIG. 1B shows a timing chart when the frame rate is 60 Hz.
- It is a flowchart which shows the flow of the display control process of the display apparatus shown in FIG.
- It is a schematic block diagram of the display apparatus which concerns on Embodiment 2 of this invention.
- It is a schematic block diagram of a display device according to Embodiment 3 of the present invention. It is a flowchart which shows the flow of the frame rate setting process of the display apparatus shown in FIG.
- FIG. 4 It is a schematic block diagram of the display apparatus which concerns on Embodiment 4 of this invention. It is a flowchart which shows the flow of the frame rate setting process of the display apparatus shown in FIG. It is a timing chart which shows the data transfer timing in the conventional display apparatus.
- Embodiment 1 is an invention applicable to a display device with a variable frame rate.
- a display that displays video by switching between double-speed driving with a frame rate of 120 Hz and normal driving with a frame rate of 60 Hz.
- the apparatus will be described as an example.
- FIG. 1 shows a schematic block diagram of the display device 1
- FIGS. 2A and 2B are timing charts showing timings of data transfer in the display device 1 shown in FIG.
- the display device 1 includes a display panel 101, a display control unit 201, a display image generation unit 301, and an image data storage unit 401, as shown in FIG.
- the display panel 101 is a display device that displays an image such as a still image or a moving image and has a variable frame rate such as a liquid crystal display panel.
- the display control unit 201 is a display control device that causes the display panel 101 to switch between two types of frame rates (120 Hz and 60 Hz) and perform video display.
- the display image generation unit 301 generates image data to be displayed on the display panel 101 from an external image signal, and transfers the image data to the display control unit 201.
- the image data storage unit 401 temporarily stores the image data received from the display image generation unit 301 by the display control unit 201, and the stored image data is read by the display control unit 201 as necessary.
- the image data storage unit 401 is a VRAM (Video Random Access Memory) that temporarily stores image data supplied from the display image generation unit 301 and transferred to the display panel 101.
- VRAM Video Random Access Memory
- the display control unit 201 determines whether or not the image data is updated for each preset image update determination period, and according to the determination result of the image update determination unit 21 and the image update determination unit 21.
- the first frame rate setting unit 22 for setting the frame rate and the VSYNC (vertical synchronization signal) generated by the frame rate set by the first frame rate setting unit 22 and the image data stored in the image data storage unit 401 Is transferred to the display panel 101 at the timing according to the generated VSYNC.
- the display control unit 201 sets a frame rate from the determination result of whether or not image data is updated every preset image update determination period, generates a display update timing from the set frame rate, Image data is transferred to the display panel 101 at the generated timing.
- the image update determination period in this embodiment is 120 Hz. That is, in the present embodiment, it is determined whether image data is updated at 120 Hz intervals.
- the image update determination period is not limited to 120 Hz, and may be 60 Hz or another frequency.
- the display control unit 201 sets the normal display update timing to 120 Hz of the double speed drive shown in FIG. 2A, and when the performance is unnecessary or when there is no display update, the display update timing is set as shown in FIG.
- the display update timing of 60 Hz shown in FIG. 2B is realized by performing frame thinning at the display update timing of 120 Hz. Specifically, as shown in FIG. 2B, the frame is thinned once from the 120 Hz data transfer interval shown in FIG. 2A to provide a period (pause period) during which no data is transferred.
- the data transfer interval of 60 Hz that is, the display update timing of 60 Hz is realized.
- the display control unit 201 determines that there is no image update and reads the image data already stored in the image data storage unit 401. The data is transferred to the display panel 101 as appropriate. At this time, the display control unit 201 determines that the performance is unnecessary or the display update is not necessary, and sets the suspension period as illustrated in FIG. The transfer of image data is temporarily stopped and the frame rate is lowered from 120 Hz to 60 Hz.
- the determination of whether or not an image is updated may be made based on whether or not the image data stored in the image data storage unit 401 is updated.
- the power consumption can be reduced by lowering the frame rate compared to the case where the frame rate is always set high.
- Display control processing Display control method
- the display control processing in the display control unit 201 having the above configuration will be described below with reference to the flowchart shown in FIG. Note that the normal frame rate of the display device 1 is 120 Hz, and when the performance is unnecessary or when there is no image update, the frame rate is lowered from 120 Hz to 60 Hz. Therefore, in the present embodiment, the upper limit value of the frame rate is 120 Hz.
- the image update determination unit 21 of the display control unit 201 determines whether or not an image is updated (S11). If it is determined that the image has been updated, the display image generation unit 301 generates image data for display (S12) and transfers it to the display control unit 201 (S13).
- the image update determination unit 21 of the display control unit 201 stores the image data transferred from the display image generation unit 301 in the image data storage unit 401 (S14).
- the image data transfer unit 23 of the display control unit 201 generates a display timing (VSYNC) (S16).
- a display timing (VSYNC) at which the display can be updated at the frame rate of 120 Hz set by the first frame rate setting unit 22 is generated. .
- the image data transfer unit 23 of the display control unit 201 reads the image data stored in the image data storage unit 401 at the generated display timing (S17) and transfers it to the display panel 101 (S18). Finally, the display panel 101 displays the image data transferred from the display control unit 201.
- the first frame rate setting unit 22 of the display control unit 201 receives a signal indicating that there is no image update from the image update determination unit 21, and determines whether to temporarily stop the transfer of the image data.
- temporarily stopping the transfer of image data is to set the pause period shown in FIG.
- the determination of the pause in S15 is made by, for example, confirming whether image display is performed in the previous frame. For example, whether or not an image display is being performed in the previous frame may be confirmed based on whether or not the image data stored in the image data storage unit 401 has been updated, or from the display image generation unit 301. It may be performed depending on whether image data is transferred at a predetermined timing (image data update determination step). That is, if the image data has been updated, it is determined that image display is being performed in the previous frame. Therefore, when the image data is updated, the image display is performed in the previous frame, so it is determined that the image data is temporarily paused (Yes in S15), and the process ends. Thus, when it pauses, it becomes 60Hz update shown in (b) of Drawing 2 (frame rate setting process).
- the processing for updating 120 Hz is normally set to 60 Hz. Thereby, compared with the case where 120 Hz update is always performed, reduction of power consumption can be aimed at.
- the first frame rate setting unit 22 determines the frame rate from the frame rate (120 Hz) at the time of the previous image update determination when the image update determination unit 21 determines that there is no image update. Also, a low frame rate (60 Hz) is set.
- the frame rate becomes a frame rate (60 Hz) lower than the frame rate (120 Hz) at the time of the previous image update determination, so compared with the case where the frame rate is 120 Hz, Power consumption can be reduced.
- the frame rate is described as an example of changing between 120 Hz and 60 Hz.
- the present invention is not limited to this, and the frame rate can be set within an arbitrary range in which the display device can operate. .
- a change setting between predetermined frame rates can be made in a range from 120 Hz to 1 Hz.
- the upper limit value of the frame rate is set to 120 Hz, and the setting of the upper limit value of the frame rate is not particularly described.
- the setting of the upper limit value of the frame rate will be described.
- the upper limit value of the frame rate can be set within an arbitrary range in which the display device can operate. For example, in the case of a liquid crystal display device that can change the frame rate in a range from 120 Hz to 1 Hz, the upper limit of the frame rate can be set in a range from 120 Hz to 1 Hz.
- FIG. 4 shows a schematic block diagram of the display device 2 according to the present embodiment.
- a frame rate instruction unit 501 for instructing the frame rate by the user is added to the configuration of the display device 1 in FIG. 1, and the display control unit 201 is replaced with the display control unit 201 in FIG.
- the display control unit 202 includes a second frame rate setting unit 24 for setting the upper limit value of the frame rate specified by the user using the frame rate instruction unit 501 in the configuration 201.
- the frame rate instruction unit 501 can select a frame rate of, for example, 120 Hz or 60 Hz by the user, and sends the selected frame rate to the second frame rate setting unit 24 of the display control unit 202. .
- the second frame rate setting unit 24 sets the upper limit value of the frame rate to 60 Hz and sends the frame rate to the first frame rate setting unit 22.
- the second frame rate setting unit 24 sends 120 Hz to the first frame rate setting unit 22 as the upper limit value of the frame rate.
- the first frame rate setting unit 22 sets the upper limit value of the frame rate set by the first frame rate setting unit 22.
- the upper limit value set by the second frame rate setting unit 24 is used.
- the second frame rate setting unit 24 instructs the first frame rate setting unit 22 to set the upper limit value of the frame rate to 60 Hz, and the first frame rate setting unit 22 always increases the frame rate to 60 Hz.
- the image data transfer unit 23 is instructed to transfer the image data to the display panel 101 so as not to fall.
- the frame rate that can be set by the user is not fixed to 120 Hz or 60 Hz, but can be set from any frame rate at which the display device can operate.
- the transfer timing of the image data to the display panel 101 is determined by the image data transfer unit 23.
- the update timing of image generation in the display image generation unit 301 also follows the display timing (VSYNC). Accordingly, the image data transfer unit 23 transfers the image data to the display panel 101 at the generated display timing.
- the display image generation unit 301 is stopped as shown in FIG. 2B by stopping the falling and rising of the display timing (VSYNC) generated by the image data transfer unit 23 once every two times. Also, image generation is performed at intervals of 60 Hz, and pause driving can be performed.
- VSYNC display timing
- the image data transfer unit 23 sets the upper limit of the display timing to 120 Hz. For this reason, when image updating is performed continuously, image data is continuously transferred to the display panel 101 at 120 Hz.
- the image can be displayed at the frame rate according to the user's request. There is an effect that the display can be performed.
- the user in addition to the first embodiment, the user sets the upper limit value of the frame rate in order to meet the user's request. However, according to the remaining battery level as in the third embodiment described below. Thus, an upper limit value of the frame rate may be set.
- FIG. 5 shows a schematic block diagram of the display device 3 according to the present embodiment.
- a battery remaining amount detection unit (battery remaining amount check unit) 601 for detecting (checking) the battery remaining amount of the display device 3 is added to the configuration of the display device 2 shown in FIG.
- a third frame rate setting that sets an upper limit value of the frame rate according to the detection result (remaining battery amount) of the battery remaining amount detection unit 601 in the configuration of the display control unit 202.
- the display control unit 203 including the unit 25 is provided.
- the upper limit value of the frame rate set by the first frame rate setting unit 22 is set to the frame set by the third frame rate setting unit 25.
- the upper limit of the rate is set by the third frame rate setting unit 25.
- the first frame rate setting unit 22 sets the upper limit value of the frame rate set by the first frame rate setting unit, The upper limit value set by the third frame rate setting unit is used.
- FIG. 6 is a flowchart showing the flow of the frame rate setting process in the third frame rate setting unit 25 of the display device 3 shown in FIG.
- the frame rate setting process is executed before the first step (S11) of the flowchart (FIG. 3) used in the description of the first embodiment.
- the third frame rate setting unit 25 detects the remaining battery level from the signal sent from the remaining battery level detection unit 601 (S31), and sets an upper limit frame rate according to the detected remaining battery level (S32).
- the battery remaining amount check target is the battery of the display device 3, but is not limited thereto, and may be a battery of an electronic device in which the display control unit 203 is mounted.
- the upper limit value of the frame rate is set according to the remaining battery level.
- the upper limit value of the frame rate for each application to be executed. May be set.
- FIG. 7 shows a schematic block diagram of the display device 4 according to the present embodiment.
- this embodiment demonstrates the case where the display apparatus 4 is mounted in portable information terminals, such as a smart phone which can perform an application.
- an application execution determination unit 701 that determines an application to be executed is added to the configuration of the display device 3 illustrated in FIG. 5, and the display control unit 203 is replaced with the display control unit 203 in FIG. 5.
- the display control unit 204 includes the fourth frame rate setting unit 26 that sets the upper limit value of the frame rate according to the determination result by the application execution determination unit 701.
- the application execution determination unit 701 transmits the identification signal of the application being executed to the display control unit 204 as the determination result.
- the fourth frame rate setting unit 26 has a table in which the application being executed and the upper limit value of the frame rate are associated with each other. When a signal identifying the application being executed is received, the fourth frame rate setting unit 26 refers to the table. Then, the upper limit value of the frame rate is set, and the upper limit value of the frame rate set by the first frame rate setting unit 22 is set as the upper limit value of the frame rate set by the fourth frame rate setting unit 26.
- the first frame rate setting unit 22 sets the upper limit value of the frame rate set by the first frame rate setting unit 22 according to the application being executed by the application execution determination unit 701.
- FIG. 8 is a flowchart showing the flow of the frame rate setting process in the fourth frame rate setting unit 26 of the display device 4 shown in FIG.
- the frame rate setting process is executed before the first step (S11) of the flowchart (FIG. 3) used in the description of the first embodiment.
- an upper limit value of a frame rate that causes the display panel 101 to display an image when the application is executed is set in advance.
- the frame rate of 120 Hz is set as the upper limit
- the frame rate of 60 Hz is the upper limit. It is set as a value.
- the fourth frame rate setting unit 26 determines whether an application execution signal has been received from the determination result sent from the application execution determination unit 701 (S41).
- the upper limit frame rate is set according to the application to be executed, and the process is terminated (S42).
- the upper limit value of the frame rate preset for each application is automatically set as the upper limit value of the frame rate set in the first frame rate setting unit 22, but the present invention is not limited to this. Rather, the update timing of the image data at the first application execution is measured to obtain the upper limit value of the frame rate, this upper limit value is stored, and the stored upper limit value is set to the first frame rate at the second and subsequent application executions.
- the upper limit value of the frame rate set in the unit 22 may be automatically set.
- the user may set the upper limit of the frame rate for each application to be used.
- the upper limit value of the frame rate may be determined in advance by the producer of the application.
- this embodiment demonstrated the example which mounted the display apparatus 4 in information portable terminals, such as a smart phone which can perform an application, it is not limited to such an information portable terminal, and application execution is possible. Any electronic device may be used.
- the setting of the upper limit value of the frame rate has been described in detail.
- the lower limit value of the frame rate is described as 60 Hz, but the lower limit value is not limited to this, and the display panel What is necessary is just to decide by the kind of liquid crystal which comprises 101.
- the display panel What is necessary is just to decide by the kind of liquid crystal which comprises 101.
- a display device that can reduce the frame rate to 1 Hz.
- the present invention is not limited to the above-described embodiments, but is applied to a display device with a variable frame rate, and further applied to an electronic device such as a personal computer equipped with such a display device to reduce power consumption. Since it has an effect, it can be applied particularly to portable electronic devices, smartphones, notebook computers, game devices, and the like.
- the control blocks (particularly the first frame rate setting unit 22, the second frame rate setting unit 24, the third frame rate setting unit 25, and the fourth frame rate setting unit 26) of the display control units 201 to 204 are integrated circuits (IC chips). ) Or the like, or may be realized by software using a CPU (Central Processing Unit).
- IC chips integrated circuits
- CPU Central Processing Unit
- the first frame rate setting unit 22, the second frame rate setting unit 24, the third frame rate setting unit 25, and the fourth frame rate setting unit 26 are instructions of a display control program that is software for realizing each function.
- the computer or CPU reads the display control program from the recording medium and executes it, thereby achieving the object of the present invention.
- a “non-temporary tangible medium” such as a tape, a disk, a card, a semiconductor memory, a programmable logic circuit, or the like can be used.
- the program may be supplied to the computer via any transmission medium (such as a communication network or a broadcast wave) that can transmit the display control program.
- the present invention can also be realized in the form of a data signal embedded in a carrier wave in which the display control program is embodied by electronic transmission.
- the display control apparatus is a display control apparatus (display control units 201 to 204) that causes the display panel 101 to display an image by switching at least two types of frame rates, and is supplied from the outside.
- a first frame rate setting unit 22 for setting the frame rate according to.
- the frame rate is set according to whether or not the image data transferred to the display panel is updated.
- the image can be smoothly displayed on the display panel by increasing the frame rate to be the same as the frame rate at the time of the previous image update determination.
- the fact that there is an update of the image data transferred to the display panel is a state where performance such as smoothness is required for the movement of the display image, so if the frame rate is set to a high value such as 120 Hz, If the frame rate is the same as the frame rate at the time of the previous image update determination and the frame rate is set to a low value such as 60 Hz, the frame rate is set higher than the frame rate at the time of the previous image update determination. Images can be displayed smoothly on the panel.
- the power consumption for image display can be reduced by setting the frame rate to be the same as or lower than the frame rate at the time of the previous image update determination.
- the fact that there is no update of the image data transferred to the display panel means that the display image has no movement such as a still image and performance is not required, so if the frame rate is set to a low value such as 60 Hz, If the frame rate is the same as or lower than the frame rate at the time of the previous image update determination, and the frame rate is set to a high value such as 120 Hz, the frame rate is higher than the frame rate at the previous image update determination.
- the power consumption associated with image display can be reduced.
- the display control apparatus is the display control apparatus according to aspect 1, wherein the image data update determination unit is stored in an image data storage unit that stores image data supplied from outside and transferred to the display panel. The presence or absence of update may be determined from the data.
- the first frame rate setting unit 22 determines that there is no image data update by the image data update determination unit (image update determination unit 21). Then, the frame rate may be set to a frame rate lower than the frame rate at the previous image update determination time.
- the frame rate is always lower than the frame rate at the time of the previous image update determination, so that power consumption can be reduced.
- the display control apparatus is the display control apparatus according to any one of the aspects 1 to 3, further comprising a second frame rate setting unit 24 for setting an upper limit value of the frame rate by the user.
- the setting unit 22 may use the upper limit value of the frame rate as the upper limit value of the frame rate set by the second frame rate setting unit 24.
- a display control device is the battery control method according to any one of the above aspects 1 to 4, wherein the battery remaining amount check is performed to check a battery remaining amount of an electronic device (display device 1 to 4) equipped with the display control device.
- a third frame rate setting unit 25 for setting an upper limit value of the frame rate according to the remaining battery level detected by the remaining battery level detection unit (battery level detection unit 601).
- the first frame rate setting unit 22 may use the upper limit value of the frame rate as the upper limit value of the frame rate set by the third frame rate setting unit 25.
- the display control device provides the display control device according to any one of the above aspects 1 to 5, for each application executed in an electronic device (display devices 1 to 4) mounted with the display control device.
- An upper limit value of a frame rate that causes the display panel 101 to display an image when executed is set, and includes an application execution determination unit 701 that determines an application being executed.
- the first frame rate setting unit 22 includes: The application execution determination unit 701 may send an identification signal of the determined application being executed, and may be an upper limit value of the frame rate associated with the application being executed.
- a display control method in the display control method for causing the display panel to perform image display by switching at least two types of frame rates, whether or not to update image data supplied from the outside is set in advance. And an image data update determination step for determining each image update period, and a frame rate setting step for setting a frame rate according to the determination result in the image data update determination step.
- the display control units 201 to 204 may be realized by a computer.
- the computer is operated as each unit (software element) included in the display control unit 201 to 204.
- a control program for the display control units 201 to 204 for realizing the display control units 201 to 204 by a computer and a computer-readable recording medium on which the control program is recorded also fall within the scope of the present invention.
- the present invention can be used for display devices capable of switching frame rates and electronic devices equipped with such display devices.
- electronic devices in particular, portable information such as battery-driven electronic devices such as smartphones. It can be suitably used for a terminal.
- Image update determination unit (image data update determination unit) 22 First frame rate setting unit 23 Image data transfer unit 24 Second frame rate setting unit 25 Third frame rate setting unit 26 Fourth frame rate setting unit 101 Display panels 201 to 204 Display control unit 301 Display image generation unit 401 Image data Storage unit 501 Frame rate instruction unit 601 Battery remaining amount detection unit (battery remaining amount check unit) 701 Application execution determination unit
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Abstract
Description
以下、本発明の実施の形態について、詳細に説明する。なお、本発明は、フレームレート可変の表示装置に適用可能な発明であり、本実施形態では、フレームレートが120Hzである倍速駆動、フレームレートが60Hzである通常駆動を切替えて映像表示を行う表示装置を例に説明する。
図1は、表示装置1の概略構成ブロック図を示し、図2の(a)(b)は、図1に示す表示装置1におけるデータ転送のタイミングを示すタイミングチャートである。
上記構成の表示制御部201における表示制御処理について、図3に示すフローチャートを参照しながら以下に説明する。なお、表示装置1の通常のフレームレートを120Hzとし、パフォーマンスが不要な場合や画像更新がない場合には、フレームレートを120Hzから60Hzに下げるものとする。従って、本実施形態では、フレームレートの上限値は、120Hzとなる。
上記構成の表示装置1において、第1フレームレート設定部22は、フレームレートを、画像更新判断部21により、画像更新無しと判断されたとき、前回の画像更新判断時のフレームレート(120Hz)よりも低いフレームレート(60Hz)に設定するようになっている。
本発明の他の実施形態について、説明すれば以下のとおりである。なお、説明の便宜上、前記実施形態1にて説明した部材と同じ機能を有する部材については、同じ符号を付記し、その説明を省略する。
図4は、本実施形態に係る表示装置2の概略構成ブロック図を示す。表示装置2は、図1の表示装置1の構成に、ユーザによりフレームレートを指示するためのフレームレート指示部501が追加され、さらに、図1の表示制御部201に代えて、当該表示制御部201の構成に、フレームレート指示部501によるユーザ指定のフレームレートの上限値の設定を行うための第2フレームレート設定部24が追加された表示制御部202を備えている。
第2フレームレート設定部24は、第1フレームレート設定部22に対してフレームレートの上限値を60Hzにするように指示し、第1フレームレート設定部22は、必ず、フレームレートが60Hzを上まらないように画像データを表示パネル101に転送するように画像データ転送部23に指示を行う。
この場合には、画像データ転送部23は、表示タイミングの上限を120Hzとする。このため、画像更新が連続でされた場合は120Hzで連続して画像データを表示パネル101に転送することになる。
本発明の他の実施形態について、説明すれば以下のとおりである。なお、説明の便宜上、前記実施形態1,2にて説明した部材と同じ機能を有する部材については、同じ符号を付記し、その説明を省略する。
図5は、本実施形態に係る表示装置3の概略構成ブロック図を示す。表示装置3は、図4に示す表示装置2の構成に、表示装置3のバッテリー残量を検出(チェック)するためのバッテリー残量検出部(バッテリー残量チェック部)601が追加され、さらに、図4の表示制御部202に代えて、当該表示制御部202の構成に、バッテリー残量検出部601の検出結果(バッテリー残量)に応じたフレームレートの上限値を設定する第3フレームレート設定部25を備えた表示制御部203を備えている。
図6は、図5に示す表示装置3の第3フレームレート設定部25におけるフレームレート設定処理の流れを示すフローチャートである。なお、本フレームレート設定処理は、前記実施形態1の説明で使用したフローチャート(図3)の最初のステップ(S11)を行う前に実行するものとする。
本発明の他の実施形態について、説明すれば以下のとおりである。なお、説明の便宜上、前記実施形態1~3にて説明した部材と同じ機能を有する部材については、同じ符号を付記し、その説明を省略する。
図7は、本実施形態に係る表示装置4の概略構成ブロック図を示す。なお、本実施形態では、表示装置4を、アプリケーションを実行可能なスマートフォン等の携帯情報端末に搭載した場合について説明する。
図8は、図7に示す表示装置4の第4フレームレート設定部26におけるフレームレート設定処理の流れを示すフローチャートである。なお、本フレームレート設定処理は、前記実施形態1の説明で使用したフローチャート(図3)の最初のステップ(S11)を行う前に実行するものとする。
表示制御部201~204の制御ブロック(特に第1フレームレート設定部22、第2フレームレート設定部24、第3フレームレート設定部25、第4フレームレート設定部26)は、集積回路(ICチップ)等に形成された論理回路(ハードウェア)によって実現してもよいし、CPU(Central Processing Unit)を用いてソフトウェアによって実現してもよい。
本発明の態様1に係る表示制御装置は、表示パネル101に、少なくとも2種類のフレームレートを切替えて画像表示を行わせる表示制御装置(表示制御部201~204)であって、外部から供給された画像データの更新の有無を、予め設定された画像更新期間毎に判断する画像データ更新判断部(画像更新判断部21)と、上記画像データ更新判断部(画像更新判断部21)の判断結果に応じてフレームレートを設定する第1フレームレート設定部22と、を備えている。
21 画像更新判断部(画像データ更新判断部)
22 第1フレームレート設定部
23 画像データ転送部
24 第2フレームレート設定部
25 第3フレームレート設定部
26 第4フレームレート設定部
101 表示パネル
201~204 表示制御部
301 表示画像生成部
401 画像データ格納部
501 フレームレート指示部
601 バッテリー残量検出部(バッテリー残量チェック部)
701 アプリ実行判断部
Claims (8)
- 表示パネルに、少なくとも2種類のフレームレートを切替えて画像表示を行わせる表示制御装置であって、
外部から供給された画像データの更新の有無を、予め設定された画像更新期間毎に判断する画像データ更新判断部と、
上記画像データ更新判断部の判断結果に応じてフレームレートを設定する第1フレームレート設定部と、
を備えていることを特徴とする表示制御装置。 - 上記画像データ更新判断部が、外部から供給され、上記表示パネルに転送する画像データを格納する画像データ格納部に格納された画像データにより更新の有無を判断することを特徴とする請求項1に記載の表示制御装置。
- 上記第1フレームレート設定部は、
上記画像データ更新判断部により、画像データ更新無しと判断されたとき、上記フレームレートを、前回の画像更新判断時のフレームレートよりも低いフレームレートに設定することを特徴とする請求項1に記載の表示制御装置。 - ユーザによりフレームレートの上限値を設定する第2フレームレート設定部をさらに備え、
上記第1フレームレート設定部は、
フレームレートの上限値を、上記第2フレームレート設定部で設定されたフレームレートの上限値とすることを特徴とする請求項1~3の何れか1項に記載の表示制御装置。 - 表示制御装置を搭載する電子機器のバッテリー残量をチェックするバッテリー残量チェック部と、
上記バッテリー残量チェック部により検知されたバッテリー残量に応じてフレームレートの上限値を設定する第3フレームレート設定部と、を備え、
上記第1フレームレート設定部は、
フレームレートの上限値を、上記第3フレームレート設定部で設定されたフレームレートの上限値とすることを特徴とする請求項1~4の何れか1項に記載の表示制御装置。 - 表示制御装置を搭載する電子機器において実行されるアプリケーション毎に、当該アプリケーションを実行したときの画像表示を表示パネルに行わせるフレームレートの上限値が設定されており、
実行されている上記アプリケーションを判断するアプリ実行判断部と、
実行されているアプリケーションに対応してフレームレートの上限値を設定する第4フレームレート設定部と、を備え、
上記第1フレームレート設定部は、
フレームレートの上限値を、上記第4フレームレート設定部で設定されたフレームレートの上限値とすることを特徴とする請求項1~5の何れか1項に記載の表示制御装置。 - 表示パネルに、少なくとも2種類のフレームレートを切替えて画像表示を行わせる表示制御方法において、
外部から供給された画像データの更新の有無を、予め設定された画像更新期間毎に判断する画像データ更新判断工程と、
上記画像データ更新判断工程における判断結果に応じてフレームレートを設定するフレームレート設定工程と、
を含むことを特徴とする表示制御方法。 - 請求項1に記載の表示制御装置としてコンピュータを機能させるための表示制御プログラムであって、上記画像データ更新判断部、上記第1フレームレート設定部としてコンピュータを機能させるための表示制御プログラム。
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