TW201316312A - Display device, control device, and electronic device - Google Patents

Abstract

A display device (1) of an embodiment of the present invention is provided with a timing controller (10) and a frame period control unit (15) that make an image be displayed while controlling the frame period with reference to frame period information. When the frame period that the frame period information denotes changes from a first frame period to a second frame period, the change from the first frame period to the second frame period is made stepwise.

Description

Display device, control device and electronic device

The present invention relates to a display device for displaying an image and a control device for supplying an image to the display device. Further, the present invention relates to an electronic device including a display device and a control device.

In recent years, display devices of thin type, light weight, and low power consumption represented by liquid crystal display devices are being widely used. It is apparent that such a display device has been mounted on, for example, a mobile phone, a smart phone, a PDA (Personal Digital Assistant), an electronic book, a laptop personal computer, or the like. In addition, it is expected that the development and spread of electronic paper, which is a thinner display device, will be rapidly promoted in the future. In such a situation, in various display devices, it is a common problem to reduce power consumption and improve display image quality.

Therefore, various technologies for the purpose of solving such problems are considered.

Patent Document 1 discloses a technique of synchronizing the timing of image data outputted to an image display unit with the timing of input image data, thereby preventing image disturbance and improving display image quality.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Laid-Open Patent Publication No. 2004-341358 (published on December 2, 2004)

Moreover, in order to improve the display image quality, the display panel is also displayed on the display panel. The frame period of the image is shortened, that is, the refresh rate is set high.

In general, the shorter the frame period is set on the display panel, the higher the display quality is. On the other hand, if the frame period is set to be short, the frequency of overwriting of the frame on the display panel becomes high, so that the power consumption becomes high.

Therefore, for example, in the case of displaying an animation or a case where the image quality is preferentially displayed in the case of selecting a high-quality mode, the frame period is set to be short, in the case of displaying a still image, or selecting a low consumption. When the power mode is prioritized and the power consumption is low, the frame period is set to be long.

However, in the case where the frame period is changed, if it is changed violently, there is a problem that the viewer feels visually uncomfortable. The reason is that the user's eyes do not follow the change of the frame period, and therefore the user feels the discomfort of the displayed image or the like due to the change of the frame period.

The present invention has been made in view of the above problems, and a main object thereof is to provide a display device capable of reducing visual discomfort to a user when a frame period, that is, a refresh rate is rapidly changed.

In order to solve the above problems, a display device according to an aspect of the present invention includes a display panel including: a plurality of gate lines; and a plurality of data lines arranged to intersect the plurality of gate lines; and a plurality of pixels delineated by the plurality of gate lines and the plurality of data lines; The mechanism controls the frame period with reference to the frame period information, and displays the image on the display panel; and the control mechanism is in the frame period represented by the frame period information from the first frame period When the second frame period is changed, the frame period is changed stepwise from the first frame period to the second frame period.

According to the above configuration, the frame period control means operates to include the first frame period and the display period in which the first frame period is used and the display time in which the second frame period is used. During the transition of the frame period of the middle frame period of the second frame period, and during the transition period, the value of the intermediate frame period is changed stepwise.

Therefore, when the frame period of the frame period information indicated by the frame period information changes sharply, the display device can also reduce the image caused to the user by the frame period indicated by the frame period signal being sharply changed. Visual discomfort such as flickering.

Furthermore, the image may be a moving image or a still image. Moreover, in the case where the image is a still image, the frame period refers to a refresh rate.

In order to solve the above problems, a control device according to an aspect of the present invention is characterized in that it is provided with a control mechanism for controlling a frame period of an image displayed on a display panel, and the control mechanism makes the frame period from the first When the frame period changes to the second frame period, the frame period is periodically changed from the first frame period to the second frame period.

According to the above configuration, when the control device changes the frame period sharply, the frame period sent to the display device can be changed stepwise. The frame period of the image displayed on the display device is prevented from changing violently. Thereby, the control device can reduce the visual discomfort of the flickering of the image caused by the user by the frame period of the image displayed on the display device being drastically changed.

In order to solve the above problems, an electronic device according to an aspect of the present invention is characterized in that it includes a display device and a control device, and the display device includes a display panel including: a plurality of gate lines; and the plurality of gates a plurality of data lines arranged in a manner of intersecting the polar lines; and a plurality of pixels defined by the plurality of gate lines and the plurality of data lines; wherein the control device controls the frame of the image displayed on the display panel a period of time; the electronic device includes a control mechanism that changes the frame period from the first frame period to a stepwise manner when the frame period changes from the first frame period to the second frame period The second frame period.

According to the above configuration, when the electronic device changes sharply in the frame period, the frame period of the image displayed on the display panel included in the display device can be prevented from rapidly changing. Thereby, visual discomfort such as flickering of an image caused by the user can be alleviated.

As described above, a display device according to an aspect of the present invention includes: a display panel including: a plurality of gate lines; and a plurality of data lines arranged to intersect the plurality of gate lines; And a plurality of pixels defined by the plurality of gate lines and the plurality of data lines; and a control mechanism that controls the frame period with reference to the frame period information to display an image on the display panel The above control agency is in the above-mentioned frame week When the frame period indicated by the period information changes from the first frame period to the second frame period, the frame period is periodically changed from the first frame period to the second frame period.

Therefore, when the frame period of the frame period information indicated by the frame period information changes sharply, the display device can also reduce the frame caused by the frame period of the image displayed on the display panel to be changed violently. Visual discomfort like flashing.

<Embodiment 1>

Hereinafter, an electronic device according to an embodiment of the present invention will be described with reference to Figs. 1 and 2 .

[Composition of electronic equipment]

First, a configuration example of the electronic device 100 of the present embodiment will be described with reference to Fig. 1 . Fig. 1 is a view showing the overall configuration of an electronic device 100 of the present embodiment.

As shown in FIG. 1, the electronic device 100 includes a display device 1 and a system side control unit (control device) 30. Further, as shown in FIG. 1, the display device 1 includes a display panel 2, a scanning line driving circuit 4, a signal line driving circuit 6, a common electrode driving circuit 8, a timing controller (control mechanism) 10, and a power supply circuit 12.

In the present embodiment, an active matrix type liquid crystal display device is used as the display device 1. Therefore, the display panel 2 of the present embodiment is an active matrix type liquid crystal display panel, and the other components described above are used to drive the liquid crystal display panel.

(display panel)

The display panel 2 includes a plurality of pixels, a plurality of gate signal lines (gate lines) G, and a plurality of source signal lines (data lines) S.

The plurality of pixels are defined by a plurality of gate signal lines G and a plurality of source signal lines S. The plurality of pixels include a plurality of pixel rows and a plurality of pixel columns, and are arranged in a so-called lattice shape.

A plurality of gate signal lines G are disposed in the pixel row direction (in the direction of the pixel row). Each of the plurality of gate signal lines G is electrically connected to a pixel of each of the corresponding pixel columns of the plurality of pixel columns.

A plurality of source signal lines S are disposed in the pixel column direction (in the direction of the pixel column), and each of them is orthogonal to each of the plurality of gate signal lines G. Each of the plurality of source signal lines S is electrically connected to a pixel of each of the corresponding pixel rows of the plurality of pixel rows.

In the example shown in FIG. 1, on the display panel 2, N source signal lines S and M gate signal lines G are provided corresponding to a plurality of pixels provided with N rows × M columns. .

(scan line drive circuit)

The scanning line driving circuit 4 sequentially selects a plurality of gate signal lines G and scans them. Specifically, the scanning line driving circuit 4 sequentially selects a plurality of gate signal lines G, and supplies the selected gate signal lines G with switching elements included in the respective pixels on the gate signal lines G ( The TFT, Thin Film Transistor, and the thin film transistor are switched to the turn-on voltage of the turn-on.

(signal line drive circuit)

During the selection of the gate signal line G, the signal line driver circuit 6 supplies the image signal to the corresponding source signal line S for each pixel on the gate signal line G. The corresponding source signal. Specifically, the signal line drive circuit 6 calculates a value of a voltage to be output to each pixel on the selected gate signal line G based on the input image data, and the voltage of the value is from the source output amplifier to Each source signal line S is output. As a result, a source signal is supplied to each pixel on the selected gate signal line G, and the source signal is written.

(common electrode drive circuit)

The common electrode driving circuit 8 supplies a common common voltage for driving the common electrode to the common electrode provided on each of the plurality of pixels.

(timing controller)

In the timing controller 10, an image signal and a control signal are input from the system side control unit 30. Here, the image signal includes a clock signal, a synchronization signal, and image data. Further, the control signal includes setting information (hereinafter, also referred to as frame period information) of the frame period in the display device 1. Furthermore, the image may be a moving image or a still image.

Further, as indicated by solid arrows in FIG. 1, the timing controller 10 outputs various control signals for causing the respective drive circuits to operate in synchronization with each drive circuit.

For example, the timing controller 10 supplies the gate start pulse signal, the gate clock signal GCK, and the gate output control signal GOE to the scanning line driving circuit 4. The scan line driving circuit 4 starts scanning of the plurality of gate signal lines G after receiving the gate start pulse signal. Then, the scanning line driving circuit 4 sequentially supplies the turn-on voltage to each of the gate signal lines G based on the gate clock signal GCK and the gate output control signal GOE.

Further, the timing controller 10 outputs the image data, the source start pulse signal, the source latch strobe signal, and the source clock signal to the signal line drive circuit 6. number. The signal line driving circuit 6 stores the image data of each input pixel in the temporary memory according to the source clock signal according to the source start pulse signal, and according to the second source latching strobe signal, Each source signal line S supplies a source signal corresponding to the image data.

(power circuit)

As shown by a broken line arrow in FIG. 1, the power supply circuit 12 supplies a voltage to each of the scanning line driving circuit 4, the signal line driving circuit 6, and the common electrode driving circuit 8.

(system side control unit)

The system side control unit 30 outputs the image signal and the control signal to the timing controller 10 included in the display device 1.

[Further function of display device]

Here, the display device 1 of the present embodiment further includes a frame period control unit (control means) 15. For example, in the example shown in FIG. 1, the frame period control unit 15 is provided as one function of the timing controller 10 on the display device 1.

(frame cycle control unit)

The frame period control unit 15 refers to the frame period information, and the timing controller 10 controls the frame period of the image displayed on the display panel 2. Specifically, the frame period control unit 15 causes the frame period to be from the frame period information when the frame period indicated by the frame period information included in the control signal supplied from the system side control unit 30 has changed. The frame period (the second frame period) before the change is indicated gradually, that is, periodically, to the frame period (the first frame period) after the change indicated by the frame period information.

In other words, the frame period control unit 15 operates to include a pre-change message between the display period in which the frame period before the change is used and the display time in which the frame period after the change is used is used. The transition period of the frame period of the middle frame period of the frame period and the changed frame period.

The frame period control unit 15 determines, according to the frame period information to be received, the frame period before the change indicated by the frame period information of the frame period is changed in several stages to the change indicated by the frame period information. Frame period.

As a method of determining the number of stages in which the frame period is changed, for example, when the period difference between the frame period before the change and the frame period after the change is large, the number of stages is large and the period difference is small. In the case of the case, the number of stages is small, and the like. By determining the number of stages in this way, the frame period can be smoothly changed from the frame period before the change to the frame period after the change in accordance with the change of the frame period.

As a method of determining the period difference between the frame periods of the respective stages in which the frame period is changed, for example, a method of setting a uniform period difference in advance is exemplified.

In addition, the period difference is large (for example, 4 ms, etc.) in the vicinity of the frame period of 25 ms and 50 ms, and the period difference is small in the vicinity of the frame period of 33 ms (for example, 2 ms). The method of etc.). For example, when the frame period changes from 16.7 ms to 50 ms, the frame period is changed to 16.7 ms, 20 ms, 24 ms, 28 ms, 31 ms, 33 ms, 35 ms, 38 ms, 42 ms, 46 ms, 50 ms.

Furthermore, in the present embodiment, the timing controller 10 and the frame period control unit 15 constitute a control unit.

Here, the frame period is the reciprocal of the refresh rate. For example, when the refresh rate is 60 Hz, the 60 frame is displayed on the display panel 2 in 1 second. Therefore, the corresponding frame period becomes 1/60 = 16.7 ms. Similarly, at a refresh rate of 40 Hz, the frame period is 25 ms, and at a refresh rate of 30 Hz, the frame period is 33 ms.

In the present embodiment, a case where the refresh rate is low, that is, a case where the frame period is long is described as an example.

In the present embodiment, the frame period control unit 15 determines a configuration in which the frame period is changed based on the frame period information, but the present invention is not limited thereto. For example, the frame period information includes setting information indicating how the frame period changes. The frame period control unit 15 may also determine how to change the frame period based on the setting information included in the frame period information.

[Action of electronic machine]

The operation of the electronic device 100 of the present embodiment will be described with reference to Fig. 2 . FIG. 2 is a view showing an example of a frame period of the display panel 2 included in the display device 1 included in the electronic device 100 of the embodiment. 2(a) shows the frame period indicated by the frame period signal supplied from the system side control unit 30, and FIG. 2(b) shows the frame period displayed on the display panel 2 included in the display device 1.

The timing controller 10 and the frame period control unit 15 included in the display device 1 receive an image signal from the system side control unit 30 during the period from time T0 to T1, and receive a frame period including the display frame as shown in FIG. A control signal for the frame period information of 16.7 ms.

The timing controller 10 drives the scanning line driving circuit 4 and the signal line driving circuit 6 in accordance with the frame period of 16.7 ms indicated by the frame period information received by the frame period control unit 15, and supplies the same from the system side control unit 30. An image represented by the image signal is displayed on the display panel 2.

The frame period control unit 15 receives the image signal from the system side control unit 30 at time T1, and receives a control signal including frame period information indicating that the frame period is 33 ms.

If the frame period indicated by the received frame period information is to be changed, the frame period control unit 15 periodically changes the frame period before the change indicated by the frame period self-frame period information to the frame. The frame period after the change indicated by the periodic information.

As shown in FIG. 2(a), the frame period control unit 15 changes the frame period indicated by the frame period information received from the system side control unit 30 from 16.7 ms in the frame before and after the time T1. 33 ms, as shown in (b), the period from time T1 to time T2 is used as the transition time to change the frame period stepwise.

As shown in FIG. 2(b), the frame period control unit 15 changes the frame period from the frame period of the immediately preceding frame, that is, 16.7 ms to 20 ms, in the subsequent frame at time T1, and secondly. (In (b) of Figure 2, near the time T2), the frame period is changed from 20 ms to 25 ms. The frame period control unit 15 further changes the frame period from 25 ms to 33 ms in the subsequent frame at time T2, and sets the frame period to 33 ms in the subsequent frame.

The timing controller 10 drives the scanning line driving circuit 4 and the signal line driving circuit in accordance with the frame period which is changed stepwise by the frame period control unit 15. 6. The image indicated by the image signal supplied from the system side control unit 30 is displayed on the display panel 2.

Specifically, the timing controller 10 displays the image with a frame period of 20 ms in the subsequent frame at time T1, and displays the image with a frame period of 25 ms in the second frame. The timing controller 10 further displays the image at a frame period of 33 ms in the frame subsequent to time T2, and drives the scanning line driving circuit 4 and the signal line driving circuit 6.

Therefore, the display device 1 can prevent the user from being caused by the frame period of the image displayed on the display panel 2 being changed drastically even when the frame period indicated by the frame period signal is changed violently. Visual discomfort.

Moreover, when the frame period is extended (the refresh rate is lowered), the visual discomfort caused to the user by the frame period is changed sharply. The reason for this is that the flicker or the like of the displayed image becomes conspicuous due to the longer period of the frame.

Therefore, when the frame period indicated by the frame period signal is rapidly increased, by using the above configuration, the effect of reducing the visual discomfort to the user can be remarkably obtained.

In the present embodiment, the case where the frame period is lengthened (that is, the refresh rate is lowered) is described as an example. However, the present invention is not limited thereto, and the frame period is shortened ( That is, the case where the refresh rate becomes high may be employed.

<Embodiment 2>

Another embodiment of the present invention will be described with reference to Fig. 3 . Furthermore, For the sake of convenience, the same components as those of the first embodiment will be denoted by the same reference numerals, and their description will be omitted. In the present embodiment, differences from the first embodiment will be mainly described.

FIG. 3 is a view showing an example of a frame period of the display panel 2 included in the display device 1 included in the electronic device 100 of the embodiment. (a) of FIG. 3 shows the frame period indicated by the frame period signal supplied from the system side control unit 30, and (b) of FIG. 3 shows the frame period displayed on the display panel 2 provided in the display device 1.

(frame cycle control unit)

When the frame period control unit 15 of the present embodiment includes a frame period before the change indicated by the frame period signal and the frame period after the change indicated by the frame period signal includes a frame period of a certain range, The frame period is changed stepwise within the certain range. Specifically, the frame period control unit 15 has a frame period of 25 ms or more when the frame period indicated by the frame period information included in the control signal supplied from the system side control unit 30 has changed. The frame period is changed stepwise from the frame period before the change to the frame period after the change.

(action of electronic machine)

The operation of the electronic device 100 up to the time T1 shown in FIG. 3 is the same as the operation of the electronic device 100 described in the first embodiment, and thus the description thereof is omitted.

The frame period control unit 15 receives the image signal from the system side control unit 30 at time T1, and receives a control signal indicating that the frame period indicated by the frame period signal is 33 ms.

If the received frame period is to be changed, the frame period control unit 15 changes the frame period from the frame period before the change to the changed period only in the range of the frame period of 25 ms or more. Frame period.

In the present embodiment, as shown in FIG. 3(a), the frame period control unit 15 causes the frame period indicated by the frame period information received from the system side control unit 30 to be in the frame before and after the time T1. When changing from 16.7 ms to 33 ms, as shown in (b), the period from time T1 to time T2 is changed as a transition time in a range of 25 ms or more.

As shown in FIG. 3(b), the frame period control unit 15 changes the frame period from the frame period of the immediately preceding frame, that is, 16.7 ms to 25 ms, in the subsequent frame of the time T1, and secondly. (In Figure 3 (b), near time T2), the frame period is changed from 25 ms to 29 ms. The frame period control unit 15 further changes the frame period from 29 ms to 33 ms in the subsequent frame at time T2, and causes the frame period to be 33 ms in the subsequent frame.

The timing controller 10 drives the scanning line driving circuit 4 and the signal line driving circuit 6 in accordance with the frame period in which the frame period control unit 15 changes, and displays an image represented by the image signal supplied from the system side control unit 30. Display panel 2.

Specifically, the timing controller 10 displays the image with a frame period of 25 ms in the subsequent frame at time T1, and displays the image with a frame period of 29 ms in the next frame. The timing controller 10 further displays the image at a frame period of 33 ms in the frame subsequent to time T2, and drives the scanning line driving circuit 4 and the signal line driving circuit 6.

Thereby, the display device 1 is in an urgent period of the frame period indicated by the frame period signal. In the case of a change in the ground, the visual discomfort caused to the user by the frame period of the image displayed on the display panel 2 is drastically changed, especially the frame period indicated by the frame period information. When it is changed in a manner including a range of 25 ms or more (that is, a refresh rate of 40 Hz or less).

The human eye is liable to feel uncomfortable when the frame period is 25 ms or more. Therefore, as in the present embodiment, the frame period is changed stepwise in a range of 25 ms or more, thereby effectively Reduce discomfort to the user.

<Embodiment 3>

Another embodiment of the present invention will be described with reference to Fig. 4 . In the following description, components having the same functions as those of the first embodiment are denoted by the same reference numerals, and their description will be omitted. In the present embodiment, differences from the first embodiment will be mainly described.

4 is a view showing an example of a frame period of the display panel 2 included in the display device 1 included in the electronic device 100 of the embodiment. 4(a) shows the frame period indicated by the frame period signal supplied from the system side control unit 30, and FIG. 4(b) shows the frame period displayed on the display panel 2 included in the display device 1.

(frame cycle control unit)

When the frame period control unit 15 of the present embodiment includes a frame period before the change indicated by the frame period signal and the frame period after the change indicated by the frame period signal includes a frame period of a certain range, The frame period is changed stepwise within the certain range. Specifically, the frame period control unit 15 When the frame period indicated by the frame period information included in the control signal supplied from the system side control unit 30 has changed, the frame period is within a range of 25 ms or more and 50 ms or less in the frame period. The frame period before the change changes stepwise to the frame period after the change.

(action of electronic machine)

The operation of the electronic device 100 before the time T1 shown in FIG. 4 is the same as the operation of the electronic device 100 described in the first embodiment, and thus the description thereof is omitted.

The frame period control unit 15 receives an image signal from the system side control unit 30 at time T1, and receives a control signal including frame period information indicating that the frame period is 100 ms.

If the frame period indicated by the received frame period information is to be changed, the frame period control unit 15 causes the frame period to change from before the change in the frame period of 25 ms or more and 50 ms or less. The frame period changes stepwise to the frame period after the change.

In the present embodiment, as shown in FIG. 4(a), the frame period control unit 15 causes the frame period indicated by the frame period information received from the system side control unit 30 to be in the frame before and after the time T1. When changing from 16.7 ms to 100 ms, as shown in (b), the period from time T1 to time T2 is changed as a transition time in a range of 25 ms or more and 50 ms or less.

As shown in FIG. 4(b), the frame period control unit 15 changes the frame period from the frame period of the immediately preceding frame, that is, 16.7 ms to 25 ms, in the subsequent frame at time T1, and secondly. In the frame, the frame period is changed from 25 ms to 29 ms. Further, the frame period control unit 15 sequentially changes the frame period from 33 ms to 40 ms and from 40 ms to 50 ms in the subsequent frame. The frame period control unit 15 further changes the frame period from 50 ms to 100 ms in the subsequent frame at time T2, and causes the frame period to be 100 ms in the subsequent frame.

The timing controller 10 drives the scanning line driving circuit 4 and the signal line driving circuit 6 in accordance with the frame period in which the frame period control unit 15 changes, and displays the image indicated by the image signal supplied from the system side control unit 30. On the display panel 2.

Specifically, the timing controller 10 displays the image at a frame period of 25 ms in the subsequent frame at time T1, and displays the image in a frame frame of 29 ms in the next frame, in the future. The frame is displayed in the frame with a frame period of 33 ms, 40 ms, and 50 ms. The timing controller 10 further displays the image at a frame period of 100 ms in a frame subsequent to time T2, and drives the scanning line driving circuit 4 and the signal line driving circuit 6.

In this way, when the frame period indicated by the frame period signal changes sharply, the display device can also reduce the visual impact on the user by the frame period of the image displayed on the display panel. Discomfort, especially when the frame period includes a range of 25 ms or more and 50 ms or less, that is, the refresh rate varies in a range of 20 Hz or more and 40 Hz or less.

The human eye is most likely to feel uncomfortable when the frame period is 25 ms or more and 50 ms or less. Therefore, the frame period is changed stepwise in the range of 25 ms or more and 50 ms or less. It can more effectively reduce the discomfort caused to the user.

<Embodiment 4>

Another embodiment of the present invention will be described with reference to Fig. 5 . In the following description, components having the same functions as those of the first embodiment are denoted by the same reference numerals, and their description will be omitted. In the present embodiment, differences from the first embodiment will be mainly described.

FIG. 5 is a view showing an example of a frame period generated by the frame period control unit 15 included in the display device 1 included in the electronic device 100 of the embodiment. Fig. 5(a) shows the frame period indicated by the frame period signal supplied from the system side control unit 30, and Fig. 5(b) shows the frame period displayed on the display panel 2 included in the display device 1.

In the present embodiment, as shown in FIG. 5, the image signal supplied from the system side control unit 30 is changed from the image signal indicating the image "A" to the display image at time T1. The image signal of "B", in turn, the frame period represented by the frame period signal included in the control signal changes from 16.7 ms to 100 ms. In the present embodiment, the case where the image "A" is a moving image and the image "B" is a still image will be described as an example, but the present invention is not limited thereto. For example, any of the images "A" and "B" can be dynamic images, and can also be still images, or the image "A" can be a still image, and the image "B" can be a dynamic image. image.

(display device)

The display device 1 of the present embodiment includes a frame memory (not shown) that temporarily stores image data of a frame constituting an image signal supplied from the system side control unit 30. Furthermore, the frame memory stores and retrieves image data by the timing controller 10.

(frame cycle control unit)

The frame period control unit 15 causes the frame period to change from the frame period information when the frame period indicated by the frame period information included in the control signal supplied from the system side control unit 30 has changed. The frame period changes stepwise to the frame period after the change indicated by the frame period information.

Further, the frame period control unit 15 causes the image represented by the image data stored in the frame memory to display only the specific number of frames during the transition period by the cooperation with the timing controller 10. Furthermore, the "specific number of frames" will be described below.

(timing controller)

First, after receiving the image signal from the system side control unit 30, the timing controller 10 stores the image data included in the received image signal in the frame memory. Next, the timing controller 10 takes out the image data stored in the frame memory, and causes the image represented by the extracted image data to display only the frame period indicated by the frame period information on the display panel 2. The scanning line driving circuit 4 and the signal line driving circuit 6 are driven by the corresponding lengths.

Further, the timing controller 10 deletes the extracted image data from the frame memory (delete processing).

Further, the timing controller 10 switches the image signal received from the system side control unit 30 to an image signal indicating another image, and causes a representation when the frame period indicated by the frame period signal has changed. The image data of the image after switching (the image after switching) is stored in the frame memory and the storage timing is delayed until it indicates that the image has been stored in the frame memory. The image data of the previous image (the image before switching) is only taken out by the specific number of frames. Again, the specific number of times will be described below.

Here, before the image data indicating the switched image is stored in the frame memory, for example, it may be temporarily stored in a buffer different from the frame memory included in the display device 1. In this case, the image data indicating the switched image can be read from the buffer at the time point stored in the frame memory. Furthermore, this embodiment is not limited to this.

Specifically, first, after receiving the image signal including the switched image and the frame period signal indicating the change of the frame period, the timing controller 10 stops taking out the frame memory and indicates that the switching is just received. The deletion processing to be performed after the image data of the image before the switching before the image. That is, in the frame memory, after the image data of the image before the switching just before the image after the switching is received, it is indicated that the image data of the image before the switching remains. been deleted.

Next, the timing controller 10 extracts only the image data of the image before the switching just before the image after the switching is received, and the frame number of the frame determined by the frame period control unit 15 is determined. The frame is deleted in the memory, and the frame constituting the switched image is stored in the new frame memory.

The timing controller 10 is driven in the above manner, thereby delaying the storage timing indicating that the image data of the switched image is stored in the frame memory until the image data frame representing the image before switching is automatically framed. Only the specific number of frames is taken out in the memory.

[Action of electronic machine]

As shown in FIG. 5, the timing controller 10 and the frame circumference included in the display device 1 The period control unit 15 receives an image signal indicating the image "A" from the system side control unit 30 during the period from the time T0 to the time T1, and receives a control signal including the frame period information indicating that the frame period is 16.7 ms.

The timing controller 10 stores the image data representing the image "A" in the frame memory. Further, the timing controller 10 takes out the image data indicating the image "A" from the frame memory, and drives it according to the frame period of 16.7 ms indicated by the frame period information received by the frame period control unit 15. The scanning line driving circuit 4 and the signal line driving circuit 6. The timing controller 10 displays the image "A" included in the image signal supplied from the system side control unit 30 in this manner on the display panel 2.

The frame period control unit 15 receives an image signal obtained by switching the image to "B" from the system side control unit 30 at time T1, and receives a control signal including frame period information indicating that the frame period is 100 ms.

If the frame period indicated by the received frame period information is to be changed, the frame period control unit 15 causes the frame period to change from before the change in the frame period of 25 ms or more and 50 ms or less. The frame period changes stepwise to the frame period after the change.

In the present embodiment, as shown in FIG. 5(a), the frame period indicated by the frame period information received from the system side control unit 30 is changed from 16.7 ms to 100 in the frame before and after the time T1. In the case of (b), the frame period control unit 15 changes the frame period stepwise as the transition time in the range of 25 ms or more and 50 ms or less.

The timing controller 10 does not delete the image data of the image "A" received at the time T1 immediately before the time T1, but at the transition period from the time T1 to the time T2. When the image data is only taken out between the specific frame numbers, the image data is deleted from the frame memory. Further, the specific number of frames is set to be appropriately set in the timing controller 10, and does not exceed the period of the frame period control unit 15 to change the frame period stepwise between the periods set as the transition period. The number of times (5 times in (b) of Fig. 5) (three times in Fig. 5).

Furthermore, the timing controller 10 may not delete the image data indicating the image "A", but cause the image "A" to continue to be displayed until the frame period of the phase change is just changed to the frame period after the change. Until the previous frame. In this case, the timing controller 10 deletes the image data indicating the image "A" after the image "A" is displayed in the frame immediately before the changed frame period, and stores the image " The image data of B", and before the changed frame period, the image "B" is displayed at the time point when the frame period changes.

As shown in FIG. 5(b), the frame period control unit 15 changes the frame period from 16.7 ms to 25 ms in the frame frame immediately before the time T1 in the subsequent frame of the time T1, and In the second frame, the frame period is changed from 25 ms to 29 ms, and in the second frame, the frame period is changed from 33 ms to 40 ms. Further, the frame period control unit 15 further changes the frame period from 40 ms to 50 ms in the next frame. The frame period control unit 15 further changes the frame period from 50 ms to 100 ms in the subsequent frame at time T2, and causes the frame period to be 100 ms in the subsequent frame.

As shown in FIG. 5(b), the timing controller 10 drives the scanning line driving circuit 4 and the signal line driving circuit 6 in accordance with the frame period in which the frame period control unit 15 is changed, and supplies the slave system side control unit 30. Represented by the image signal The image is displayed on the display panel 2.

Specifically, the timing controller 10 displays the image "A" with a frame period of 25 ms in the subsequent frame of time T1, and causes the image to be "framed" with a frame period of 29 ms in the second frame. The display of A" further displays the image "A" at a frame period of 33 ms in the next frame, thereby driving the scanning line driving circuit 4 and the signal line driving circuit 6. Here, after the image controller "A" is displayed in the frame period of 33 ms, the timing controller 10 deletes the image data indicating the image "A" in the frame memory and stores the image "B". The image data can be.

Moreover, the timing controller 10 displays the image "B" with a frame period of 40 ms and 50 ms, and displays the image "B" at a frame period of 100 ms in the frame after the time T2. The scanning line driving circuit 4 and the signal line driving circuit 6 are driven.

In the present embodiment, the frame period control unit 15 has described the frame period indicated by the frame period information included in the control signal supplied from the system side control unit 30. When the change occurs, the frame period is changed from the frame period before the change to the frame period after the change in the range of 25 ms or more and 50 ms or less, but the present invention is not limited to the frame period. this.

For example, the frame period from the change of the frame period may be changed stepwise to the frame period after the change, regardless of whether the change of the frame period indicated by the frame period signal includes a specific range. Moreover, when the change of the frame period indicated by the frame period signal includes a frame period of 20 ms or more, the following configuration may also be adopted: the frame period is 20 Within the range of ms or more, the frame period is changed stepwise from the frame period before the change to the frame period after the change.

According to the above configuration, the timing controller 10 and the frame period control unit 15 change when the frame period indicated by the frame period signal changes rapidly from the frame period before the change to the frame period after the change. The image represented by the image data stored in the frame memory displayed in the previous frame period displays only the specific number of frames during the transition period.

Therefore, when the image after switching after the changed frame period is different from the image before switching after the frame period before the change, during the transition period, After the image is switched, only the specific number of frames is displayed, and the image after switching is displayed. That is, during the transition period, the switched image can be displayed after the display of the specific number of frames of the image before switching.

Therefore, during the transition period, the image can be switched. Therefore, it is possible to prevent the frame period from being changed sharply when the image before switching is switched to the image after switching, thereby reducing visual discomfort to the user.

<Embodiment 5>

Hereinafter, an electronic device according to another embodiment of the present invention will be described with reference to Figs. 6 and 7 .

[Composition of electronic equipment]

First, a configuration example of the electronic device 100' of the present embodiment will be described with reference to Fig. 6 . Fig. 6 is a view showing the overall configuration of the electronic device 100' of the embodiment.

As shown in FIG. 6, the electronic device 100' includes a display device 1', and system side control Department (control device) 30'. Further, in the electronic device 100' of the present embodiment, the timing controller 10' included in the display device 1' does not include the frame period control portion, and the system side control portion 30' includes the frame period control portion (control) The timing controller 20 of the mechanism 25 has the same configuration as the electronic device 100 described in the first embodiment. Here, for the sake of convenience, the same components as those of the first embodiment will be denoted by the same reference numerals, and their description will be omitted.

(The timing controller included in the display device)

The timing controller 10' inputs an image signal and a control signal from the system side control unit 30. The timing controller 10' drives the scanning line driving circuit 4 and the signal line driving circuit 6 in accordance with the input image signal and control signal.

[System side control unit]

The system side control unit 30' outputs the image signal and the control signal to the timing controller 10' included in the display device 1'.

(frame cycle control unit)

The frame period control unit 25 controls a mechanism for displaying the frame period information of the image on the display panel 2 included in the display device 1'. Specifically, when the frame period indicated by the frame period information included in the control signal changes, the frame period control unit 25 causes the frame period to be before the change of the frame period information. Sexually change to the frame period after the change indicated by the frame period information.

(timing controller)

The timing controller 20 determines whether or not the frame period signal of the frame period of any one of the stages of the frame period generated by the frame period control unit 25 is generated. The image signal is switched at the time point.

Furthermore, in the present embodiment, the timing controller 20 and the frame period control unit 25 constitute a control unit.

[Action of electronic machine]

The operation of the electronic device 100' of the present embodiment will be described with reference to Fig. 7 . FIG. 7 is a view showing an example of a frame period of the display panel 2 included in the display device 1 included in the electronic device 100' of the embodiment. Fig. 7(a) shows the frame period indicated by the frame period signal supplied from the system side control unit 30', and Fig. 7(b) shows the frame displayed on the display panel 2 provided in the display device 1'. cycle.

In the present embodiment, a case will be described in which the frame period indicated by the frame period information transmitted by the system side control unit 30' is changed from 16.7 ms to 100 ms, and the image signal is represented. Switch from image "A" to image "B".

The system-side control unit 30' transmits an image signal indicating the image "A" during the period from time T0 to T1, and transmits a control signal including frame period information indicating that the frame period is 16.7 ms.

The timing controller 10' of the display device 1' drives the scan line drive circuit 4 and the signal line drive circuit 6 in accordance with the frame period of 16.7 ms indicated by the received frame period information, whereby the slave system side control unit 30 The image "A" indicated by the supplied image signal is displayed on the display panel 2.

Further, when the frame period control unit 25 of the system-side control unit 30' changes the frame period from 16.7 ms to 100 ms, the period from the time T1 to the time T1 is a transition period, and the frame period is 25 ms or more. Range below 50 ms The internal frame period changes periodically.

As shown in FIG. 7(a), the frame period control unit 25 changes the frame period from 16.7 ms to 25 ms in the subsequent frame at time T1, and causes the frame period to be 25 from the second frame. The ms change to 29 ms, which in turn causes the frame period to change from 33 ms to 40 ms in the next frame. Further, the frame period control unit 25 further changes the frame period from 40 ms to 50 ms in the next frame. The frame period control unit 15 further changes the frame period from 50 ms to 100 ms in the subsequent frame at time T2, and causes the frame period to be 100 ms in the subsequent frame.

At this time, the timing controller 20 determines whether or not to switch the image signal from the time point at which the frame period information indicating the frame period of any one of the frame periods which are changed stepwise by the frame period control unit 25 is transmitted. .

As shown in (a) of FIG. 7, the timing controller 20 determines to transmit the presentation image "A" at the time of transmitting the frame period signal of the frame period of 33 ms generated in the frame period control unit 25. Image signal. Further, it is determined that the image signal indicating the image "B" is switched from the time point when the frame period signal of the frame period of 40 ms generated by the frame period control unit 25 is transmitted.

Furthermore, the timing at which the image signal is switched in the timing controller 20 is not limited thereto, and the image signal may be switched from the time point at which the frame period of any stage is transmitted during the period of the transition period.

The system side control unit 30' transmits the frame period signal and the image signal to the display device 1'.

The timing controller 10' of the display device 1' is in the period from time T1 to T2 The scanning line driving circuit 4 and the signal line driving circuit 6 are driven based on the frame period information and the image signal shown in (a) of FIG. 7 received from the system side control unit 30', whereby (b) ), the image "A" is displayed in a stepwise change to a frame period of 25 ms, 29 ms, and 33 ms, and the image "B" is changed stepwise to 40 ms and 50 ms. It is displayed after the frame period.

Further, after time T2, the image "B" is displayed in a frame period of 100 ms to drive the scanning line drive circuit 4 and the signal line drive circuit 6.

In the present embodiment, the case where the frame period control unit 25 changes the frame period indicated by the frame period information to change the frame period to 25 ms or more and 50 ms or less. Within the range, the frame period before the change is changed stepwise to the frame period after the change, but the present invention is not limited thereto.

For example, it is also possible to adopt a configuration in which the frame period before the change of the frame period is changed stepwise to the frame period after the change, regardless of whether the change of the frame period indicated by the frame period signal includes a specific range. . Moreover, when the change of the frame period indicated by the frame period signal includes a frame period of 20 ms or more, the following configuration may be adopted: in the range of the frame period of 20 ms or more, the frame period is self-contained. The frame period before the change changes stepwise to the frame period after the change.

According to the above configuration, the system-side control unit 30' periodically changes the frame period transmitted to the display device 1' when the frame period indicated by the frame period signal is changed abruptly, thereby preventing the frame period from being changed stepwise. The frame period of the image displayed on the display device 1' changes drastically. Thus, system side control The portion 30' can alleviate the visual discomfort such as flickering of an image caused by the user by the frame period of the image displayed on the display device 1' being sharply changed.

<Modification>

Next, the configuration of the display panel 2 included in the display device 1 and the display device 1' in the above-described first to fifth embodiments will be described with reference to FIG. FIG. 8 is a view showing the configuration of pixels included in the display panel 2.

(The composition of the pixels included in the display panel)

FIG. 8 shows the configuration of two pixels (pixels (n, m) and pixels (n+1, m)) among a plurality of pixels included in the display panel 2 shown in FIGS. 1 and 6.

The pixel (n, m) represents a pixel connected to the source signal line S(n) and the gate signal line G(m). The pixel (n+1, m) represents a pixel connected to the source signal line S(n+1) and the gate signal line G(m). Furthermore, the other pixels included in the display panel 2 are also configured in the same manner as the pixels.

As shown in FIG. 8, the pixel includes a TFT 200 as a switching element. The gate electrode of the TFT 200 is connected to the corresponding gate signal line G. Further, the source electrode of the TFT 200 is connected to the corresponding source signal line S. Further, the drain electrode of the TFT 200 is connected to one end of the liquid crystal capacitor Clc and the holding capacitor Ccs. Furthermore, the other end of the liquid crystal capacitor Clc is connected to the common electrode COM.

When pixel data is written to the pixel, first, a turn-on voltage is supplied from the gate signal line G to the gate electrode of the TFT 200. Thereby, the TFT 200 is switched to the on state.

Then, when the TFT 200 is in the ON state, when the source signal is supplied from the corresponding source signal line S, the source signal is supplied from the drain electrode of the TFT 200 to the pixel electrode of the liquid crystal capacitor Clc and the storage capacitor Ccs.

In this way, the source signal is supplied to the pixel electrode of the liquid crystal capacitor Clc, whereby the alignment direction of the liquid crystal enclosed between the pixel electrode of the liquid crystal capacitor Clc and the common electrode COM is based on the supplied source signal. The voltage level changes in accordance with the difference in voltage level supplied to the common electrode COM, and an image corresponding to the difference is displayed.

Further, the source signal is supplied to the storage capacitor Ccs, whereby the charge corresponding to the voltage of the source signal is accumulated in the storage capacitor Ccs. Further, the pixel can maintain a state in which an image is displayed for a certain period of time by the electric charge accumulated in the holding capacitor Ccs.

(Characteristics of TFTs using an oxide semiconductor as a semiconductor layer)

In the first to fifth embodiments, the TFT 200 is not particularly limited. However, as the TFT 200, a TFT including a semiconductor layer using an oxide semiconductor as a material can be used. Further, the oxide semiconductor contains, for example, IGZO (InGaZnOx).

The characteristics of the TFT 200 in the case where an oxide semiconductor is used as the TFT 200 will be described with reference to FIG. Fig. 9 is a view showing the characteristics of various TFTs. Specifically, FIG. 9 shows a TFT using an oxide semiconductor as a semiconductor layer, an a-Si (amorphous silicon) TFT, and a TFT using LTPS (Low Temperature Poly Silicon). Characteristics of the person.

In Fig. 9, the horizontal axis (Vgh) indicates the voltage value of the on-voltage supplied to the gate in each of the TFTs, and the vertical axis (Id) indicates the amount of current between the source and the drain in each of the TFTs.

In particular, the period shown as "TFT-on" in the figure indicates the turn-on voltage. While the voltage value corresponds to the ON state, the period shown as "TFT-off" in the figure indicates a period in which the voltage is turned off in accordance with the voltage value of the ON voltage.

As shown in FIG. 9, the amount of current (i.e., electron mobility) of the TFT using the oxide semiconductor is higher than that of the TFT using the a-Si. Although the illustration is omitted, the TFT using the oxide semiconductor is 20 to 50 times higher than the TFT using the a-Si in the on state, and the on-characteristic is excellent, so that it is easy to cause the frame. The period is 16.7 ms or less, that is, the refresh rate is 60 Hz or more.

In the display panel 2 included in the display devices 1 and 1' of the first to fifth embodiments, the TFTs can be driven by smaller TFTs by using TFTs having oxide semiconductors having such excellent turn-on characteristics. Thereby, the display panel 2 can make the ratio of the area occupied by the TFTs in each pixel small. That is, the aperture ratio of each pixel can be increased, and the transmittance of the backlight can be improved. As a result, a backlight that consumes less power can be used, or the brightness of the backlight can be suppressed, so that power consumption can be reduced.

Moreover, since the TFT has excellent on-characteristics, the electron mobility at the time of writing the source signal to each pixel can be increased, and the time taken for the writing can be further shortened, so that the display panel 2 can be easily shortened. Frame period (ie, it is easy to increase the refresh rate).

Further, as shown in FIG. 9, the leakage current when the TFT using the oxide semiconductor is in the off state is about one-hundredth of that of the TFT using a-Si, and the disconnection characteristic in which the leakage current is hardly generated is excellent. . In this way, the disconnection characteristic is excellent, and thus the frame period is easily 33 ms or more, that is, Make the refresh rate below 30 Hz.

In the display panel 2 of the first to fifth embodiments, a TFT using an oxide semiconductor having such excellent disconnection characteristics is used for each pixel, whereby the source signals of the plurality of pixels included in the display panel 2 can be maintained for a long period of time. In the state of entering, the frame period of the display panel 2 can be easily extended (that is, the refresh rate is easily lowered).

[Additional item 1]

The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention. That is, the embodiment obtained by combining the technical means appropriately changed within the scope disclosed in the scope of the patent application is also within the technical scope of the present invention.

Further, in the modification, the present invention has been described as an example in which a display device using a TFT using an oxide semiconductor is used for each pixel. However, the present invention is not limited thereto, and a-- is used for each pixel. The present invention can also be applied to a TFT of Si, a display device using another TFT such as a TFT of LTPS.

[Addition 2]

A display device according to an aspect of the present invention includes: a display panel including a plurality of gate lines; and a plurality of data lines arranged to intersect the plurality of gate lines; and a plurality of pixels defined by the plurality of gate lines and the plurality of data lines; and a control mechanism that controls the frame period with reference to the frame period information to display an image on the display panel; The above control mechanism is in the above frame period When the frame period indicated by the information changes from the first frame period to the second frame period, the frame period is periodically changed from the first frame period to the second frame period.

According to the above configuration, the frame period control means operates to include the first frame period and the display period in which the first frame period is used and the display time in which the second frame period is used. During the transition of the frame period of the middle frame period of the second frame period, and during the transition period, the value of the intermediate frame period is changed stepwise.

Therefore, when the frame period of the frame period information indicated by the frame period information changes sharply, the display device can also reduce the image caused to the user by the frame period indicated by the frame period signal being sharply changed. Visual discomfort such as flickering.

Furthermore, the image may be a moving image or a still image. Moreover, in the case where the image is a still image, the frame period refers to a refresh rate.

Further, in the display device according to an aspect of the present invention, preferably, in the frame period control means, the control means changes the frame period in a range of 25 ms or more.

Therefore, when the frame period of the frame period information indicated by the frame period information changes sharply, the display device can also reduce the visual impact on the user by the frame period of the image displayed on the display panel. Discomfort, especially if the frame period is more than 25 ms, that is, the refresh rate varies by a range of 40 Hz or less.

The human eye is easy to feel when the frame period is more than 25 ms. Therefore, the frame period is changed stepwise in a range of 25 ms or more, thereby more effectively reducing the discomfort to the user.

Further, in the display device according to an aspect of the present invention, preferably, the frame period control means changes the frame period in a range of 50 ms or less.

Therefore, when the frame period of the frame period information indicated by the frame period information changes sharply, the display device can also reduce the visual impact on the user by the frame period of the image displayed on the display panel. Discomfort, especially when the frame period is in a range of less than 50 ms, that is, the refresh rate varies by a range of 20 Hz or more.

The human eye is prone to discomfort when the frame period is less than 50 ms. Therefore, the frame period is changed step by step within a frame period of 50 ms or less, thereby effectively reducing the user's cause. Discomfort.

Furthermore, the human eye is most likely to feel uncomfortable when the frame period is 25 ms or more and 50 ms or less. Therefore, the frame period is changed stepwise in the range of 25 ms or more and 50 ms or less. Thereby, the discomfort to the user can be more effectively alleviated.

Moreover, preferably, the display device according to an aspect of the present invention further includes a frame memory that stores image data indicating an image displayed by the first frame period, wherein the control mechanism causes the frame to be During the period of periodic change, the image represented by the image data stored in the frame memory only displays a specific number of frames.

Further, in a display device according to an aspect of the present invention, preferably, the control unit determines the specific number of frames by referring to the frame period information.

Further, in a display device according to an aspect of the present invention, preferably, the control means is different in an image displayed by the first frame period and an image displayed by the second frame period. And storing the image data indicating the image displayed by the second frame period in the frame memory is delayed until the image data indicating the image displayed in the first frame period is only displayed. The number of frames is up.

According to the above configuration, when the frame period indicated by the frame period signal changes sharply from the first frame period to the second frame period, the display device stores the information in the first frame period in the frame memory. The image represented by the image data in the body displays only a specific number of frames during a period in which the frame period is changed stepwise (hereinafter, also referred to as a transition period).

Thereby, the image displayed in the second frame period (also referred to as the second image) and the image displayed in the first frame period (also referred to as the first image) are different images. In the case, during the transition period, the second image may be displayed after the first image is displayed only for the specific number of frames. That is, during the transition period, the second image can be displayed after being displayed after the display of the specific number of frames of the first image.

Therefore, the image can be switched during the transition period, so that the frame period can be prevented from being drastically changed from the first image to the second image, and the visual discomfort to the user can be reduced.

Further, in a display device according to an aspect of the present invention, preferably, each of the plurality of pixels includes a TFT including a semiconductor layer using an oxide semiconductor as a material.

Further, in the display device according to an aspect of the present invention, the oxide semiconductor system IGZO is preferable.

According to the configuration described above, in the display device, it is easy to change the frame period, that is, the refresh rate, by using an oxide semiconductor having excellent on-characteristics and off-characteristic characteristics as the TFT of the semiconductor layer for each pixel.

Moreover, the control device according to an aspect of the present invention is characterized in that it comprises a control mechanism for controlling a frame period of an image displayed on the display panel, wherein the control mechanism causes the frame to be When the period changes from the first frame period to the second frame period, the frame period is changed stepwise from the first frame period to the second frame period.

According to the above configuration, when the control device changes the frame period sharply, the frame period of the image displayed on the display device can be prevented by changing the frame period sent to the display device stepwise. Change eagerly. Thereby, the control device can reduce the visual discomfort of the flickering of the image caused by the user by the frame period of the image displayed on the display device being drastically changed.

Moreover, an electronic device according to an aspect of the present invention is characterized in that it includes a display device and a control device, and the display device includes a display panel including: a plurality of gate lines; and the plurality of a plurality of data lines configured by crossing the gate lines; and a plurality of pixels defined by the plurality of gate lines and the plurality of data lines; wherein the control device controls the image displayed on the display panel The frame period, the electronic device includes a control mechanism, which is from the first frame period to the second frame in the frame period When the period changes, the frame period is periodically changed from the first frame period to the second frame period.

According to the above configuration, when the electronic device changes sharply in the frame period, the frame period of the image displayed on the display panel included in the display device can be prevented from rapidly changing. Thereby, visual discomfort such as flickering of an image caused by the user can be alleviated.

[Industrial availability]

The display device of the present invention can be used in various display devices using an active matrix method, such as a liquid crystal display device, an organic EL (electroluminescence) display device, and electronic paper.

1‧‧‧ display device

1'‧‧‧ display device

2‧‧‧ display panel

4‧‧‧Scan line driver circuit

6‧‧‧Signal line driver circuit

8‧‧‧Common electrode drive circuit

10‧‧‧Sequence controller (control mechanism)

10'‧‧‧Sequence Controller (Control Mechanism)

12‧‧‧Power circuit

15‧‧‧ Frame cycle control department (control agency)

20‧‧‧Sequence controller (control mechanism)

25‧‧‧ Frame Cycle Control Department (Control Agency)

30‧‧‧System side control unit (control device)

30'‧‧‧System side control unit (control device)

100‧‧‧Electronic machines

200‧‧‧Electronic machines

Fig. 1 is a view showing the overall configuration of an electronic apparatus according to an embodiment of the present invention.

2(a) and 2(b) are views showing an example of a frame period of a display panel of a display device included in an electronic device according to an embodiment of the present invention.

3(a) and 3(b) are views showing an example of a frame period of a display panel of a display device included in an electronic device according to another embodiment of the present invention.

4(a) and 4(b) are views showing an example of a frame period of a display panel of a display device included in an electronic device according to still another embodiment of the present invention.

5(a) and 5(b) are views showing an example of a frame period of a display panel of a display device included in an electronic device according to still another embodiment of the present invention.

Fig. 6 is a view showing the overall configuration of an electronic apparatus according to still another embodiment of the present invention.

7(a) and 7(b) are diagrams showing an electronic apparatus according to still another embodiment of the present invention. A diagram of an example of a frame period of a display panel of a display device.

Fig. 8 is a view showing the configuration of pixels included in a display panel of the display device of the present invention.

Fig. 9 is a view showing the characteristics of various TFTs.

1‧‧‧ display device

2‧‧‧ display panel

4‧‧‧Scan line driver circuit

6‧‧‧Signal line driver circuit

8‧‧‧Common electrode drive circuit

10‧‧‧Sequence controller (control mechanism)

12‧‧‧Power circuit

15‧‧‧ Frame cycle control department (control agency)

30‧‧‧System side control unit (control device)

100‧‧‧Electronic machines

Claims (10)

A display device, comprising: a display panel, comprising: a plurality of gate lines; a plurality of data lines arranged in a manner intersecting the plurality of gate lines; and the plurality of gate lines and the a plurality of pixels delineated by a plurality of data lines; and a control mechanism that controls the frame period with reference to the frame period information while displaying an image on the display panel; and the control mechanism is in the frame period information When the frame period indicated changes from the first frame period to the second frame period, the frame period is changed stepwise from the first frame period to the second frame period. The display device of claim 1, wherein the control means causes the frame period to be changed stepwise within a range of 25 ms or more. A display device according to claim 1 or 2, wherein said control means causes said frame period to be changed stepwise within a range of 50 ms or less. The display device of any one of claims 1 to 3, further comprising: a frame memory that stores image data representing an image displayed in the first frame period, and wherein the control means causes the message During the period in which the frame period is changed step by step, the image represented by the image data stored in the frame memory is displayed for only a specific number of frames. The display device of claim 4, wherein The control unit determines the specific number of frames by referring to the frame period information. The display device of claim 5, wherein the control means causes the second display to be different when the image displayed in the first frame period is different from the image displayed in the second frame period The image data of the image displayed by the frame period is stored in the frame memory and the storage timing is delayed until the image data indicating the image displayed in the first frame period is displayed for a specific number of frames. The display device according to any one of claims 1 to 6, wherein each of the plurality of pixels is provided with a TFT including a semiconductor layer using an oxide semiconductor as a material. The display device of claim 7, wherein the oxide semiconductor system is IGZO. A control device is provided with a control mechanism for controlling a frame period of an image displayed on a display panel, wherein the control mechanism changes the frame period from the first frame period to the second frame In the case of a cycle, the frame period is periodically changed from the first frame period to the second frame period. An electronic device characterized by comprising a display device and a control device, the display device comprising a display panel comprising: a plurality of gate lines; and a plurality of data lines arranged to intersect the plurality of gate lines And delineated by the plurality of gate lines and the plurality of data lines a plurality of pixels; the control device controls a frame period of the image displayed on the display panel; and the electronic device includes a control mechanism that changes from the first frame period to the second frame period in the frame period The frame period is changed stepwise from the first frame period to the second frame period.