KR20010053114A - Display - Google Patents

Abstract

In particular, in the hold type display device, excellent display is achieved even in both moving and still images.

In the case of displaying a moving picture for this purpose, a driving method or an illumination method suitable for moving pictures such as making an intermediate image, intermittent driving or the like is used.

For example, in the case of displaying a still subject such as an OA screen, a driving method such as a liquid crystal is adopted.

In addition, in the image display, it detects whether a moving picture or a still picture is made and drives corresponding thereto.

In addition, research is focused on display of gradation of images.

Description

Display device {DISPLAY}

Although the response of a conventional liquid crystal display device using an active matrix type TN liquid crystal or the like has been slow, the response time of the display is drastically faster with the progress of liquid crystal materials such as the development of OBC type liquid crystal.

Therefore, the use of a liquid crystal display device in a large television apparatus or the like has been researched and developed, and the driving method at this time is getting close.

That is, in the high speed display in the liquid crystal display device, the pixel performs the hold type display. In addition, since the problem of the hold display device is described in detail in Reference 1 below, a minimum necessary description will be given in the present specification.

REFERENCE 1 Guri-Daysuichi "Liquid Display Display Type and Picture Quality in Moving Picture Display" Liquid Crystal Society, 1st LCD Forum Preview (1998-08).

First, the hold display will be described.

As shown in Fig. 1A, in pulsed display such as a CRT (cathode ray tube, so-called CRT), one field period for each pixel (time required to display one screen, currently 1/60 second in normal television broadcasting, etc.) Strong light is emitted to indicate only a fraction of the time.

On the other hand, as shown in Fig. 1B, in the liquid crystal display device, the light used for almost continuous display is held. In this FIG. 1B, the solid line is the change in the luminosity in the ideal case, and the broken line is the change in the actual luminosity.

In addition, although only conceptually shown on account of the substrate space, the luminance of the CRT shown in FIG. 1A is much higher than that of the liquid crystal shown in FIG. 1B.

However, in the case of the hold display, as shown by the solid line, the response time, which is the time from the start of the light emission of the pixel to the rated luminosity, or conversely, the time from the start of light exposure to the total darkness, For example, it is known that when a moving picture is displayed, even if it is as fast as 0 ms, the blur effect or the responsiveness of the screen is caused by the integration effect of the human eye (this is also described in detail in Reference 1).

In addition, the integrated effect of the human eye is a physiological (psychological) effect of averaging and recognizing a moving picture or image composed of several images, for example, a kind of afterimage effect.

The cause is explained very simply with reference to FIG.

Assume that the black circle 61 displayed on the upper left side of the display surface 191 in FIG. 2 (1) has moved to the position of the black circle 62 on the lower right side in the following case. In this case, as shown in (2), in the case of CRT, only a partial period of one field period indicated by the up and down arrows is displayed with a black circle 61 on the upper left side, and other periods are not indicated with the black circle as shown on the right side. .

Subsequently, a black circle 62 is displayed at a position on the lower right in a part of the next field period. In this case, since the human eye also recognizes that the black circle is moving to the bottom right in the front and back flow of the image (not shown), the movement from the top left to the bottom right of the black circle also appears smoothly.

However, in the liquid crystal display, since the black circle 61 is continuously displayed on the left side of the screen through one field period, it is difficult to recognize the movement of the black circle even if the black circle 62 is displayed on the lower right side during the next one field period. .

In other words, although there is a perception that the black circle is moving to the lower right in the flow of the image not shown in the head, in reality, it is still displayed for a certain period of time, which causes confusion in the head. As a result, blurring of the image, delay in responsiveness during operation, and the like occur.

And for this matter,

Reference 2 "Inorganic materials for information science 142 Committee A sectional meeting (liquid crystal materials) 71st research meeting B sectional meeting (Intelligent organic materials) 62nd research meeting joint research meeting materials Japanese society promotion society November 20, 1998 (Heisei 20) It is explained in.

Therefore, further description is omitted.

And the following method is known to be effective to improve the blurring of an image in such a hold display.

(1) The hold time of the display light is shortened.

(2) The display light is placed as much as possible on the screen position according to the operation of the image.

In order to shorten the holding time of (1), as described in Japanese Patent Application Laid-Open No. 9 (1997) -325716, an opening time is provided in synchronization with the vertical synchronization for display by installing a liquid crystal shutter somewhere in the display device. To control.

In addition, as described in Ref. 2 as another means, a so-called flush that causes the backlight to be synchronized and flashes in a pulse may be used.

However, in these methods, first, the utilization efficiency of light falls. Secondly, the backlight system is complicated and expensive. Third, the liquid crystal shutter at this point is difficult to speed up.

As a method of limiting the aperture ratio by the driving method, there is also a method of intermittent driving as described in References 3 and 4 below.

Ref. 3: Advancement on LCD Moving Picture Display, Daira et al., Liquid Crystal Display, 1st LCD Forum (1998-08)

Reference 4: Nakamura et al. 『Fairy Tale Vision New LCD』 1998 First Liquid Crystal Forum

However, this method also divides one field (time for displaying one screen) into a plurality of subfields and inserts a black screen as a subfield. Therefore, it is necessary to operate the drive driver at high speed, which is often difficult in circuit.

Moreover, as the method of (2), it is known that a large effect is obtained by making a field frequency high, for example, to double.

However, the field frequency of 120 Hz is a burden on the pixel driving IC and the like. Also, since the number of display screens is doubled, a circuit for so-called operation compensation is displayed in the case of displaying a compensation screen on the increased screen based on the intermediate value between the original screen and the next original screen. Since it is necessary, the scale of the signal processing circuit is also increased, resulting in an increase in cost.

In addition, there is also a gray scale display method as a countermeasure against delay in response of the screen, but a voltage adjustment method is generally used. This is a method of adjusting the voltage value applied corresponding to the gray scale data.

Also, a time division gradation display method is used in a display device such as a plasma display, which cannot be used only for binary display in a discharged state and a non-discharged state. In the time division gradation display method, one field is divided into a plurality of subfields, and gradation display is performed by a difference in the total amount of time when the subfields are turned on.

Here, when the gradation display is made into 8 bits, the length ratio is divided into eight subfields of 1: 2: 4: 8: 16: 32: 64: 128, and turned on and off as a whole as a whole. Display gradation.

At this time, on and off of each subfield are performed by the respective bit data when the gradation data is displayed in 8 bits.

There are other projection displays as display devices using liquid crystals. It consists of a light source unit for outputting substantially parallel luminous flux, a display element for controlling the amount of luminous flux transmitted in accordance with the displayed image, and a lens unit for projecting the luminous flux.

A liquid crystal display element is generally used for the display element, but a DLP element for changing the angle of the minute mirror may be used in some cases. However, the same problem occurs in this projection display.

In addition, the same problem also occurs in liquid crystal plasma displays and EL displays which are generally held display.

In the above, the problem of delayed display in the hold display device has been mainly described. However, in a display using a time division gray scale display system such as plasma display, the gray scale called pseudo contour is uniform in driving display. There is a problem that is not displayed.

Therefore, first of all, in displaying a moving picture, there is no problem caused by the integration effect, and the image, screen or surface is bright and simple and inexpensive in a hold type display device such as a projection type liquid crystal display device (display). Development was desired.

Moreover, even if it is going to implement the conventionally proposed countermeasure, the development of the technique which can be made simple and low cost was desired.

Second, the moving picture display by the conventional moving picture correspondence technology has many problems to be solved, but when displaying a moving picture or an image, it is possible to achieve smooth display with any power. When used for display, for example, when used on an OA screen or when a still image is displayed, it is an eye-friendly display not present in the CRT of a conventional liquid crystal display such as eye fatigue due to jitter. It has been lost.

However, in recent years, there has been a high demand for the common use of display devices for various devices such as game machines, personal computers, word processors, televisions, and the like. In addition, unlike in the United States, in Japan, where the housing situation is poor, there is a great expectation for a display device using liquid crystal, which is easy to form a thin and large display area unlike CRT.

Therefore, it is possible to display moving images while maintaining the original friendliness of the liquid crystal display device without jitter, flicker due to strong light, and the like, such as CRT. The emergence of devices, especially liquid crystal displays, has been desired.

In high-vision broadcasting and the like, this is possible, and development of low-cost devices has been desired.

In addition, in the case of moving picture correspondence display in which the field frequency is doubled, especially in high-vision broadcasting and the like, a circuit or the like for various kinds of processing is required and the device itself becomes expensive.

Therefore, there has been a demand for the development of a liquid crystal display device suitable for displaying a still image at a low cost for high vision.

Moreover, the recurrence of the display apparatus which does not produce a pseudo contour even if it is not a hold type was desired.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hold type liquid crystal display device, and more particularly to a hold type display device for displaying moving pictures or displaying moving pictures and still pictures separately.

1 is a view showing a state of change in luminance in CRT and LCD displays.

Fig. 2 is a diagram for explaining the cause of the response delay of the operation in the hold display.

It is a block diagram of the principal part of 1st Embodiment of this invention.

4 is a diagram showing a state of an intermediate image used for display in the second embodiment of the present invention.

Fig. 5 is a diagram showing a relationship between data flow, arrival time and display time of a screen to be displayed in the above embodiment.

6 is a configuration diagram of principal parts of the liquid crystal display device in the above embodiment.

7 is a configuration diagram of main parts of a liquid crystal display device according to a third embodiment of the present invention.

FIG. 8 is a diagram showing the contents of an image intermittently displayed in the above embodiment. FIG.

9 is a configuration diagram of principal parts of a liquid crystal display device according to a fourth embodiment of the present invention.

10 is a configuration diagram of principal parts of a liquid crystal display device according to a fifth embodiment of the present invention.

Fig. 11 is a configuration diagram of principal parts of a liquid crystal display device of a sixth embodiment of the present invention.

12 is a view conceptually showing the display method of the seventh embodiment of the present invention.

Fig. 13 is a diagram conceptually showing the gradation response in the above embodiment.

14 is a diagram conceptually showing a projection type liquid crystal display device according to an embodiment of the present invention.

FIG. 15 is a view conceptually showing the configuration and operation of the shutter of the display device of the embodiment. FIG.

Fig. 16 is a diagram showing the positional relationship between the shining start portion of the horizontal scanning line of the display portion and the opening end of the chopper in the above embodiment.

Fig. 17 is a view showing the area of light emission of the pixel and the display surface of the above embodiment in comparison with a CRT method and a normal liquid crystal display element.

18 is a diagram conceptually showing a liquid crystal display device of a ninth embodiment of the present invention.

19 is a diagram conceptually showing the operation of the shutter of the display device of the above embodiment.

20 is a diagram conceptually showing a display device of a tenth embodiment of the present invention.

Fig. 21 is a diagram conceptually showing the operation of the continuous image and the creation of the intermediate image, which are conceived by the eleventh embodiment of the present invention.

Fig. 22 is a configuration diagram of the liquid crystal display device of the above embodiment.

Fig. 23 is a diagram conceptually showing a circuit for displaying the twelfth embodiment of the present invention in comparison with the conventional one.

FIG. 24 is a diagram conceptually showing the luminance, the waveform of the transmittance, and the like of the above-described embodiment, in comparison with those of other methods.

Fig. 25 is a diagram conceptually showing a circuit for display in the thirteenth embodiment of the present invention.

Fig. 26 is a diagram conceptually showing a circuit for display in the fourteenth embodiment of the present invention.

Fig. 27 is a diagram conceptually showing a circuit for display in the fifteenth embodiment of the present invention.

Fig. 28 shows the operation of the sixteenth embodiment of the present invention.

29 is a diagram showing the configuration of a seventeenth embodiment of the present invention.

(Explanation of symbols for the main parts of the drawing)

1: main body of liquid crystal display

21, 22: backlight lamp

3: light guide part

4: High speed switch

5: switching unit

11: Water department

12: image distribution

13: Odd Image Memory

14: Even Picture Memory

15: 1/60 second delay circuit

16: 1/120 second delay circuit

17: averaging circuit

18: display control unit

19: display unit

20: odd-numbered image left trimmed part

21: Even-numbered image right cut off part

22: intermittent display control unit

25: communication part such as communication protocol

26: signal detection determination unit

27: moving control display control unit

28, 29: button, switch

30: judgment unit

31: sampling point collection unit

32: sample point data storage

33: comparison unit

34: moving picture display control unit

35: various moving picture display processing unit

40: division

41: display device

42: peripheral drive unit

43: center drive part

44: assimilation control unit

45: switch

46 center display

47: surrounding display surface

311: lamp

312 reflector

313: chopper

314: liquid crystal display device

315: projection lens

316: screen

341 LCD shutter

361: footnote mirror

362: Integrator

401: receiver

402: buffer for pre-input image

403: operation comparison

404: judgment unit

405: intermediate image creation unit

406: display control unit

407: display unit

511 TFT transistor

512 pixel electrode

513: gate line

514: source line

515: discharge means

516: counter electrode

531: reference potential wiring

532: resistance

533: liquid crystal resistance

534: resistance

(Initiation of invention)

Disclosure of Invention The present invention has been made in view of the above-mentioned problem. In the display device, especially a display device using a hold-type display device or a liquid crystal display, it is simpler than the conventional method to eliminate blurring and response delay due to an integration effect on moving pictures and images. For example, an intermediate image or a black screen can be easily created.

Similarly, the problem is solved after discovering the nature of the image which is likely to cause the above-mentioned blur and response delay.

Next, in a display device that displays moving pictures and still images (holding type), when moving pictures are displayed, driving or lighting corresponding to moving pictures is used, and when moving pictures are displayed, switching to driving and lighting corresponding to still pictures is performed. .

In addition, research has been focused on determining whether the image data to be displayed is a moving picture or a still picture and displaying the picture data appropriately based on this. Specifically, the configuration is as follows.

In the first aspect of the present invention, the display device using liquid crystal or the like, in particular, the drive means for moving the moving object to display on the display surface using the holding display element, i. The driving means for the still image and the switching means for determining whether the image displayed by the user's operation communication protocol and the automatic detection by the built-in program is a moving image or a still image in advance and appropriately switching the above two means in a predetermined manner. It is characterized by having. As a result, the following operation is achieved.

When the image to be displayed is a moving picture, the moving means driving means causes the display means to display the moving subject (suitable for moving pictures) (the still picture may be displayed on account of the scene).

The stationary driving means likewise displays the stationary subject.

The switching means switches both means in accordance with an image to be displayed by a predetermined method based on data or a program recorded at the time of manufacture.

In another invention, the hold display means uses a liquid crystal anyway whether it is transmissive or reflective.

The moving means driving means has a moving liquid crystal driving part for moving the liquid crystal driving corresponding to the moving image or a moving part lighting driving part for illuminating the moving image when receiving the video signal for display. And of course you may have both. As a result, the following operation is achieved.

The moving picture liquid crystal drive section of the moving picture drive means performs moving picture-compatible liquid crystal drive when receiving a video signal of a normal television broadcast or the like (or receiving an instruction to display the video signal). Similarly, the moving picture lighting drive unit provides lighting corresponding to the moving picture.

According to another aspect of the present invention, the moving picture liquid crystal driver is a high field frequency display driver for displaying an image by raising a field frequency such as 1/60 second to a predetermined multiple, such as twice as in the case of a still image display. As a result, the following operation is achieved.

The moving picture liquid crystal drive section is a high field frequency drive section, and therefore displays an image at a higher field frequency than in the case of still display.

Therefore, if necessary, an intermediate image may be created, or the second half of the field may be grayed to the extent that black or afterimage effects are not adversely affected.

In another invention, the liquid crystal driver for moving pictures is an intermittent drive display driver for displaying a screen by intermittent driving. As a result, the liquid crystal driving unit for moving pictures displays moving pictures by intermittent driving such as the left half of the even-numbered image, the right half of the odd-numbered image, and the right and left alternates as appropriate. As a matter of course, backlight dimming may be performed as necessary.

In another invention, the moving picture lighting driver has a short-term lighting section for lighting display light such as a light emitting diode or a lamp shorter than a period corresponding to the field frequency. As a result, the moving image lighting driver turns on the display light for a shorter period than, for example, the first 1/90 second, for a period corresponding to a field frequency such as 1/60 second. And this is basically the first 1/120 second display, but may be the last 1/90 or 1/120 seconds.

In another invention, the moving picture lighting driver has a pulse lighting section that lights up in a pulse form every screen in the moving picture display. As a result, the pulse lighting unit of the moving image lighting driver is composed of a plurality of images so as not to adversely affect the afterimage effect in the display of the moving image. However, for each screen of each image, pulsed light as a backlight is provided. The first 1/120 seconds of the field frequency lights up in a predetermined order, such as turning off.

In another invention, the switching means is an automatic switching means for detecting this when displaying an image such as at the time of receiving a video signal and automatically switching to the driving means for moving pictures. As a result, the following operation is achieved.

The switching means is an automatic switching means integrated with a memory, a CPU, a personal computer, or the like. When a video signal is received, the switching means detects this in a predetermined program and automatically switches to the driving means for moving pictures. In addition, appropriate instructions are given to the respective parts such as the display means and the backlight.

In another aspect of the present invention, the automatic switching means detects a fast-moving screen prior to display by at least a difference with the front screen (including a partial image of a specific position or property) and performs a moving picture corresponding drive. It is a detection type automatic switching means. As a result, the following operation is achieved.

The automatic switching means is a differential detection type automatic switching means, which detects commercial broadcasting and screen switching by at least the difference between the front screen and other cases, and makes it easy to detect and view before the display of the fast screen. Correspondence drive. Therefore, there are exceptions such as the display of time signals, but the principle is that the actual display is delayed by at least one field.

In another invention, the stationary driving means has a normal lighting unit which continuously lights the display light for a longer period of time than said during the period corresponding to the field frequency when displaying the stationary image.

As a result, the stationary driving means turns on the display light during the period corresponding to the field frequency so as to be easy to see when displaying the still image (such as in the case of moving pictures with slow operation by other cases).

According to another aspect of the present invention, a device such as a liquid crystal display device has a high-speed response in which response time is faster than at least one field period (1/60 second in principle, 1/120 second depending on the case) so that the moving picture can be sufficiently complied with. I have a device.

Specifically, it has a high speed response element such as OCB mode, so that the response time is faster than at least one field period such as 10 ms.

According to another aspect of the present invention, a judging means for judging whether image data to be displayed is a moving picture or a still picture, and if the judging means determines a moving picture, a portion of the display surface, particularly a part including a central part with a lot of motion, is separated from the peripheral part. And a central moving unit driving means for displaying an appropriate moving subject such as displaying the subject or moving subject in hi-vision mode. As a result, the following operation is achieved.

The determining means determines whether the image data to be displayed is a moving picture or a still picture. If the judging means is judged to be a moving picture, the central moving picture driving means separates the part including the central part of the display name from its peripheral part and displays the appropriate moving picture subject.

Therefore, in the periphery of the display surface, the display of the moving picture in the still picture subject and the high-vision video are displayed in the normal mode instead of the high vision mode.

And, of course, even if it is a moving picture, when there are few motions and motion vectors, it may be a matter of course that it may have a function which displays still image correspondence.

In another invention, not only the hold type, but also the voltage adjusting means and the time division gradation display method are used in the gradation display system of a display device in general. In particular, when the period of the video signal input to the display device is one field, this one field is divided into a plurality of subfields, and a time division gradation display method of "plural subfield number-1" bits is used.

In another invention, the number of subfields is 2 (in principle, equally spaced) in terms of simplicity, balance between cost and effect. Of course, you may have a function which makes it into an uneven space | interval according to broadcast content, such as a CM program.

In another invention, in the gradation display, when the number of subfields is 2, for example, when the gradation is 50% or less, the second half of one field is not displayed. This aims to solve the delay of the response and the integration effect.

In another invention, the subfield of 1 is ON (ordinarily ON for a normal liquid crystal display device, 100% luminance), OFF (0%) gradation display, and the other subfields are ON (100) according to the gradation in charge. %) Time is adjusted.

In addition, the absolute light intensity itself (whether the value is 100%) of the backlight may be appropriately increased or decreased due to the margin of power supply in the shape and the like, the degree of indoor lighting, and the like.

In another invention, the response time of each pixel element of the display device is 16 ms or less because it is necessary to display a moving picture of 60 seconds per second.

In another invention, an OCB mode liquid crystal is used as the high speed response means.

In another invention, the last period of one field is not displayed by using an optical or mechanical shutter (in principle, unlike in the case of a movie) as a means of solving the response delay caused by the integration effect.

In another invention, the update of each image of the displayed moving image and video and the blocking of light by the shutter are synchronized. Specifically, on the display surface of the liquid crystal or the like, it is sequentially updated from the upper pixel column (rather than from the left, right, and bottom at this point in time), but this update is synchronized with the passage of the shutter (or opening of the shutter means). have.

Therefore, for example, immediately after the update, light of only the first half of one field passes after the new pixel is started.

In another invention, the shutter is a chopper having an opening (hole) in which the passing light has a height of half of the display surface (by diffusion of light, parallelism, etc.).

In another invention, a shutter is formed of a liquid crystal capable of high-speed response such as ferroelectric mode, OCB mode, and scattering mode.

In another invention, a light beam scanning means, specifically, for example, a rotating mirror is used by switching to a shutter.

In another invention, as a rotating mirror, a small rotating footnote mirror which moves the angle of the mirror on a semiconductor electrically, a so-called micromirror device, is used.

In another invention, a shutter is a small dimension about the same as a liquid crystal display part (including a projection film part).

In another invention, a liquid crystal of a mode capable of high-speed response at 30 ms or less, specifically, an OCB mode or the like is used for the display unit.

According to another aspect of the invention, in the hold display device, the original (original) image data is used to improve the operation responsiveness in the display of moving pictures and images, in particular, images of 1/30 to 1/60 are sequentially updated in one second. Creates an intermediate image and inserts it between the original images.

Therefore, although the original image is displayed for 1/60 second each, 1/120 second is displayed, and the intermediate image created by the original image before and after etc. is displayed for 1/120 second between the original image. Therefore, the total display time is invariant.

In another invention, the creation of an intermediate image uses two original image data before and after to be inserted or image data before and after these other than these two original images. In addition, an intermediate image may be created by inserting the image outward from the previous two images (the latter image is not used) in terms of a fast and temporally accurate response.

In another invention, attention is paid to a motion vector that is easy to be noticed when an image is displayed to create an intermediate image. Specifically, it is the movement of an average brightness part, an moving part, etc. of each part of an image, such as the brightest point, the darkest point in an image, and the like. Therefore, image compression techniques (MPEG and the like) are also employed as necessary.

In addition, a sum of a plurality of pixels at predetermined positions and pixels separated from the predetermined position from each pixel may be taken out to calculate a sum of levels focused on distances, and motion vectors may be calculated above the absolute value of the sum of the levels on the front and rear screens. .

According to another invention, in principle, each pixel maintains a predetermined state in one field, for example, light and dark, in order to display a moving picture in a hold display device (or conventionally, In the end of each field, the display state is lost.

Therefore, the following structure is achieved.

Depending on the size of the display surface, the display elements of each pixel arranged in several rows, columns, and planes or multilayers (for example, G, H, and cells) according to the specification of the display surface transmit or block light by application of an electric field. The display function in charge of the

By the way, when the voltage applying means applies an electric field for display, the electric field is kept constant within one field time interval (although there is actually a slight decrease in reality).

However, in the present invention, the discharge means eliminates this electric field by little discharge. Therefore, at least in each field, at the end of one field, the electric field is zero, and in some cases, a small value such that no integral effect occurs.

As a result, the response delay of the moving picture is improved.

In another invention, the display means is formed on an active matrix substrate having a TFT or the like for driving the element.

In another invention, the display element is a liquid crystal display device using an liquid crystal, an EL display device, a liquid crystal plasma display, or the like.

In another invention, the liquid crystal layer has a certain degree of conduction or resistance, and therefore the electric field applied to the electrodes such as the upper and lower sides of the liquid crystal layer is extinguished within one field interval by the current flowing through the liquid crystal layer itself. .

In another invention, the electrical conductivity of the liquid crystal is 10 ^-10 (Ωcm) ^-1 or more.

In another invention, the electric field applied to one of the electrodes, such as the upper and lower sides of the liquid crystal layer, or the horizontal electrode, is extinguished by the flow of electricity to the earth line formed on the substrate or the substrate.

In another invention, attention is paid to supplemental doses (focused on research) to prevent delays in fairy tales.

In another invention, attention has been paid to whether the liquid crystal on the display surface is normally white or normally black.

In another invention, the polarity in application of the electric field is changed alternately every screen or every horizontal pixel row. As a result, the DC component at each time interval becomes 0, and the charge rise can be avoided. It is also a more flexible display.

Next, the embodiment of the present invention will be described.

(1st embodiment)

In the display device of this embodiment, a display device for driving a liquid crystal in a mode called OCB by TFT is used. The response time was 8ms.

The OCB mode is described in detail in, for example, Japanese Patent Laid-Open No. 8 (1996) -84254.

In addition, the panel structure (structure) using the liquid crystal of OCB mode is demonstrated in detail in reference document 5, for example.

And the panel using the liquid crystal of the OCB mode of this embodiment was produced similarly.

Reference 5: Uchida et al. 「IDRC '97」 (1997) p37

Therefore, the description of the OCB mode itself or the structure of the panel is omitted.

In addition, although a method of using a flush lamp is employed as a lighting method for moving pictures, this is described in detail in Reference 6.

Reference 6: Daira et al. 「AMLCD '98」 (1998)

Therefore, detailed description of the principle of the flush lamp and the driving method itself is omitted.

In this OCB mode liquid crystal display device using a TFT (thin film transistor) for driving the pixel, the flush lamp method is used for a moving picture corresponding to a fast moving picture such as a normal video signal or a game machine, as shown in FIG. In the case of an OA screen (when an Internet screen, an OA soft screen, or a video signal displays still images such as landscapes), that is, a display corresponding to a still image, illumination of a normal continuous lighting state was used.

In addition, in this figure, 1 is a main-body part of the liquid crystal display device of OCB mode. 21 and 22 are lamp parts for the backlight. 3 is a light guide part. 4 is a high speed switch. 5 is a switching part.

Moreover, in addition to the above, the display surface has switching means for use as a part (display portion) of other equipment such as a display of a movie recorded on a game machine VTR, an OA device such as a word processor, etc. It is not shown because there is no direct relationship to the intent.

In the case of display corresponding to a still picture, only the left lamp 21 is lit. On the other hand, in the case of the moving picture correspondence display, the lamp sections 21 and 22 on both the left and right sides are lit, but on / off lights at high speed synchronized with the vertical synchronization are made on each screen of the moving picture under the high speed switch.

Then, the observer himself switched the display method according to the display contents. Thus, a display with less blurring during moving pictures and less tired eyes during still pictures was obtained.

In this case, the light quantity of the flush lamp may be controlled by the voltage of the lamp unit (not shown) so that the brightness of the display surface does not differ in correspondence with moving pictures and still pictures.

(2nd embodiment)

In this embodiment, an intermediate image is created and inserted.

In the present embodiment, instead of the flush lamp, the field frequency is doubled (120 Hz) for display of moving pictures, thereby obtaining a display without blur as in the previous embodiment.

This state is shown in FIG. Left (1) of this figure is the content of image data transmitted one by one. (2) shows the contents of the intermediate image which are created in sequence on the basis of the transmitted image data.

As shown in (1), on the display surface 191, black squares 61 to 63 are moved from the upper left to the lower right of the screen.

Therefore, as shown in (2), intermediate images 612 and 613 showing black square operation in the middle are created. The images are displayed in the order indicated by the thick arrows in this figure.

Hereinafter, this signal processing will be described with reference to FIG. 4 shows the state of the image data displayed in this case.

In this figure, the interval of the vertical white circle "○" is 1/60 second, and the interval of the decimal point "." And ○ is 1/120 second.

1, 2,... Data on the screen is sent at 1/60 second intervals. In the normal state except for the first screen and the like, the data of each screen is divided into the first two. The divided one is then averaged with the delayed data of 1/40 second (1/60 second + 1/90 second) of the previous screen already reaching 1/60 second before, and an intermediate image is created.

This created intermediate image is used for display 1/120 seconds after the arrival of the image (1/40 second after the arrival of the previous image).

One other than the divided one is memorized for 1/60 seconds, and then divided into two again. The divided one is used for display as it is delayed by 1/60 second after arrival.

Next, the divided data is stored again for 1/120 second, and then the average value with the data of one next screen arriving after 1/60 second is 1/40 second after arrival (1 / after image arrival after 1 image). 120 seconds later) (and in this case, it actually takes some time for the averaging process, and there are some time lags between the two front and back screens, but of course they are properly compensated for).

6 shows a configuration of main parts of the apparatus. In this figure, 11 is a water phase part. 12 is an image distribution part. 13 is an odd number image storage unit. 14 is an even number image storage unit. 15 is a 1/60 second delay circuit with F1F0. 16 is likewise a 1/120 second delay circuit. 17 is an averaging circuit and has a delay circuit and a memory not shown. 19 is a display part.

In the moving picture correspondence display, the display control unit switches the display cycle of the display unit from 1/60 second to 1/120 second and selects an image to be displayed therefor.

That is, the screen data sent from the two 1/60 second delay circuits and the averaging circuit are appropriately selected and used for display.

In the present embodiment, one intermediate image is generated, but the number of intermediate images is not limited thereto. Increasing the number of intermediate images results in a smoother image.

At this time, if the number of intermediate images is increased, it is necessary to increase the frequency of displaying images accordingly.

In addition, in this case, when the first image is A, the next image is B, and the number of images inserted and displayed in the middle is 2, the first intermediate image is (2A + B) / 3, the next. The intermediate image is (A + 2B) / 3. Similarly, when the number of images is three, the intermediate images to be displayed are (3A + B) / 4, (A + B) / 4, and (A + 3B) / 4. In addition, you may create from two images before and after each.

In addition, the screen change or the user's channel switching may be performed. However, since these are not so difficult both technically and technically, further description is omitted.

As a result, high-speed display can be realized without losing brightness.

(Third embodiment)

This embodiment is intermittent driving as a driving method for moving pictures.

That is, although half of the black screen is put in one field, this results in less blurring. In this case, if the brightness of the illumination (backlight) remains the same, the brightness is halved in comparison with the still image, so that the brightness of the illumination is doubled.

The structure of the main part of this embodiment is shown in FIG.

In this figure, 11 is an odd-numbered image-left cut-out part. 12 is an even-numbered right side cropping part. 22 is an intermittent display control unit.

In the above, the intermittent display control unit sends the black image to the display unit alternately in the left / right half at intervals of 1/60 second, and also controls the luminance of the backlight twice to achieve moving picture corresponding display.

This state is shown in FIG. In this figure, the images shown from top to bottom, that is, from (1) to (4) are displayed in sequence. At this time, the left half 1911 of the odd-numbered image and the right half 1912 of the even-numbered image are erased and displayed.

(Comparative Example 1)

Although the same hard (liquid crystal display device) as in the previous three embodiments is used, blurring becomes noticeable when the display drive corresponding to the still image is performed in the case of moving pictures.

On the contrary, jitter and the like became remarkable when the display drive corresponding to the moving picture was made in the case of a still picture, and the eyes were tired for long time use.

(4th Embodiment)

This embodiment relates to a liquid crystal display for displaying moving pictures and still pictures separately.

In the case of a video signal, the liquid crystal display device of the present embodiment is provided with image detection means in a signal circuit so as to automatically display moving pictures. As a result, in the case of the video signal, the driving corresponds to the moving image as in the first embodiment, and in the case of the still image, the driving corresponds to the still image.

In the present embodiment, the NTSC type color television broadcast is detected by detecting the presence of a clock signal, a luminance signal, and a carrier color signal. The structure of the principal part of the apparatus in this case is shown to FIG. 9A.

In this figure, 25 is a storage unit such as a communication protocol. 26 is a signal detection determination unit. 27 is a moving picture display control switching unit.

The signal detection determination unit judges whether or not the image signal sent to the display unit by the award unit is a moving picture based on various communication protocols, and if necessary, switches the display necessary for the moving picture correspondence display switching unit.

Specifically, the contents of the switching are, as described above, doubled the amount of light in the backlight together with those for the intermittent display that doubles the display period.

However, the determination of whether or not the moving picture is performed may not be determined by the leading edge image signal, but may be detected by a switch or button operation by the user of the apparatus. The configuration in this case is shown in Fig. 9B.

Specifically, the judging section 30 determines that the video is selected as a moving picture when the channel of the television receiver is selected, and determines that it is a still picture when the keyboard is operated.

Also in this embodiment, although it differs somewhat according to the screen, the effect similar to the previous three embodiment was acquired.

(5th Embodiment)

This embodiment relates to a liquid crystal display device for judging whether or not moving pictures are taken into consideration, based on a difference between a signal of a previous screen and a signal currently received, in particular, the difference in signal level described above.

Therefore, a memory and a differential circuit are used. The above is the same as that of the fourth embodiment described above.

The structure of the principal part of this embodiment is shown in FIG.

In this figure, 30 is a determination part. 31 is a sampling point. 32 is the sample point data storage. 33 is a comparison part. 34 is a moving picture display control unit. 35 is a processing unit for displaying various moving pictures.

The sampling point collecting unit collects predetermined pixel data for each data of each screen on which the receiving unit receives, etc., and notifies the comparison unit.

The comparison unit compares the sample point data in front of the screen stored in the sample point data storage unit with the data notified by the sample point collecting unit, performs a predetermined operation to obtain the difference, and sends it to the judgment unit, and sends the notified data. The data is sent to a sample point data storage unit consisting of F1F0 to update the stored contents.

The judging section judges whether the image is a moving picture or a still picture on the basis of the difference sent, and notifies the moving picture corresponding display control section of the judgment result.

The moving picture display control unit causes the moving picture display unit to display the moving picture corresponding to various moving picture display processing units or display units when a notification of moving picture is provided.

Therefore, in the liquid crystal display of the present embodiment, even if the still image is displayed even in the video recorded on the tape and the broadcasted video, the display is automatically displayed corresponding to the still picture. Therefore, it becomes easier to see.

(6th Embodiment)

In the present embodiment, even if the moving picture is moving only in the displayed figure, only the center part of the display surface corresponds to the moving picture.

In other words, even in the case of moving pictures, only the center of the display surface is actually moving on the display surface.

Specifically, for example, if it is a news program, it is separate if it is a unit of seconds or minutes, but if each screen is updated 60 times a second, it is actually the face of the announcer that is moving as a figure. As a matter of fact, only pitchers and batters are in the drama. In many cases, what is moving is only in the center of the screen being displayed.

Further, particularly in the case of large screen display, the viewer hardly sees the end of the display surface, the peripheral portion, and the like. Specifically, for example, in the baseball real state, only the pitcher and the ball in the center of the screen are seen, and the ground wall, the grass in the lower part, and the like are not seen.

In addition, most of the important parts of the displayed image are near the center of the display surface. Sheriffs and villains staring at each other in the Western drama may be seen at the left and right ends of the screen, but in this case, the sense of urgency is the main, and whether the displayed image is bad does not have much meaning. Therefore, only the center portion of the screen is used for moving picture display.

The display device of this embodiment focuses on the above, and the configuration thereof is shown in Fig. 11A.

In this figure, 40 is a division part. 41 is a display device, 42 is a peripheral drive part therein, 43 is a center drive part, and 44 is a moving picture correspondence control part which controls the center drive part in the same way in moving picture correspondence display. 45 is a switch.

The division section divides the image data from the image receiving section into the peripheral section and the central section and sends them to the peripheral section and the central section, respectively.

If the judging unit judges that the moving picture is a moving picture, the transmission of the image data from the dividing part to the central drive part is switched to a switch and sent to the moving picture correspondence control part.

The moving picture correspondence control unit displays the sent image data in the center of the display surface in correspondence with the moving picture. Therefore, necessary processing such as lighting of the dedicated backlight of the corresponding unit is also performed.

Fig. 11B shows a schematic configuration of the display surface of this device as seen from the back side.

46 is the display element portion in the center and is on the viewer side. 47 is a peripheral display element section on the back side.

In the present embodiment, a smooth display without jitter or the like without impairing the quality of the moving picture is obtained, and the price is also inexpensive as compared with the corresponding moving picture.

And also in the display apparatus of this embodiment, as a result of the observation test which used various image data, the very favorable screen similarly to 1st Embodiment was obtained.

In the present embodiment, not only the manufacturer of the device but also adjustments with a broadcasting station and the like are necessary, but if the communication protocol, compression such as MPEG, and other communication standards themselves are sent as fine data, the periphery of each screen is sent. Great effects occur in increasing the number of channels, miniaturization of the recording apparatus, or low cost in other types of display devices such as CRTs.

(7th Embodiment)

In this embodiment, gradation display is performed without inserting a black screen in order to make a moving image easier to see.

Then, despite using a liquid crystal that operates at a high speed as described above, what is not so fast seen haphazardly occurs because the display is maintained for one field period.

Therefore, if the holding time of the display is shortened, a high speed response is obtained.

As a means, the time which does not display an image within one field time is formed, and it is possible to reliably speed up the insertion of a black screen, but the brightness decreases.

However, the inventors have found that the slow response and the appearance of afterimages are remarkable in halftone images. That is, when a bright image moves, the afterimage is not noticeable.

In more detail, the half-tone response, in particular, the delay of responsiveness is remarkable when the image of less than half the brightness is moving. The most noticeable afterimage is the case where a dark gray pattern operates on a black background.

And this was confirmed even in the TV image of CRT display, and afterimage was easy to see on a dark screen.

Therefore, in this embodiment, the voltage adjustment method and the time division gradation display method are used together in the gradation display method.

Therefore, the liquid crystal display device of the present embodiment is particularly effective when used in display portions such as television receivers in which smooth operation is important. However, in recent years, many OA terminals, such as personal computers, are used for AV applications.

The display device adopts an active matrix substrate using TFTs, and a liquid crystal of a high-response OCB mode liquid crystal of 3 ms.

A display method comprising: dividing one frame (display interval of) into front and rear first subframes (images displayed at the previous display interval) and second subframes (images displayed at the second display interval). At this time, a driving method using a voltage adjustment method and a time division gradation display method of 1 bit in combination was used. 12 conceptually shows a display method of the display device of the present embodiment.

Fig. 12 shows driving waveforms when the gradation level is 0%, 30%, 50%, 70%, and 100%, respectively.

When the gradation level is 50% or more, the second second subframe is fixed to the maximum voltage and applied. If the gradation level is 50% or less, the applied voltage of the second subframe in the second half is minimum.

Although the means, the first subframe is applied by varying the voltage value by the voltage adjusting method. The voltage applied to the first subframe at this time is adjusted to be the maximum voltage at 50% when the gradation level is 50% or less.

When the gradation level is 50% or more, the value is obtained by subtracting 50% from the gradation level (that is, the difference is 0 to 50%). Therefore, the maximum is at 50%.

In this embodiment, since the minimum voltage is the voltage at which the luminance is the lowest, some bias voltage is applied and interpolation is performed therebetween.

That is, the second subframe corresponds to the maximum bit when the gray scale data is digitally represented, and the first subframe outputs the analog output. At this time, if 1-bit time division gradation is displayed, it is indicated.

In this case, when the gradation level is 50% or less, a rest period during which no voltage is applied is inserted for one subframe. In particular, the response becomes a problem because the luminance is low, which is very effective.

Here, since one frame is divided into two to be written, the frequency of writing the liquid crystal panel is scanned twice as fast. Therefore, there is a need for a liquid crystal device that responds at a relatively high speed. Since the response speed of this device needs to be completed within one frame, it has to be 16ms (= 1ch ÷ 60) or less. It is preferable that this response speed is lower than the response between all the gradations.

Fig. 13 shows waveforms to be applied in response between the gray levels. The gradation response of 30%-0%, 30%-110%, 60%-0% is shown to A-C of FIG. 13, respectively.

In this embodiment, since the 1-bit time division gradation display method is used in combination, in the display of 50% or less, it flashes every subframe. This is similar to inserting a black screen similarly.

When it changes to 0%, when it changes to 100%, it inserts just before it changes, and it has the characteristic that a response becomes high speed.

In the case of 50% or more, a full black screen is not inserted, but the change is accompanied by a change in luminance, so that the response can be seen quickly. In the case of displaying the luminance of 100%, it is the same as the conventional voltage adjusting method.

In the method of the present embodiment, there is a drawback that the effect of improving the response speed is lowered in the gradation of 50% or more in comparison with the method of inserting a black screen in theory. However, this gradation region is not a problem even if the response is slow as can be seen from the above description. On the other hand, the liquid crystal display of the present embodiment has a great advantage that the brightness does not decrease at all.

12 and 13, the liquid crystal display element used in the present embodiment uses a liquid crystal in the OCB mode, so that the response speed is sufficiently fast and therefore the change in the amount of transmitted light is almost the same as the driving waveform. lost.

In addition, although the display element using the liquid crystal of the OCB mode of this embodiment used the normally black which becomes black display in the low voltage state, this may be reversed, and if a high-speed response is obtained, the liquid crystal itself is limited to the OCB mode. Of course not.

That is, for example, even if a TN type liquid crystal device having a response speed of about 8 ms is generally used, if the driving voltage is increased to give a high speed response, the effect of the present embodiment can be obtained.

However, the liquid crystal display device of the present embodiment sufficiently exhibits its effects and performances at present, such as an OCB type liquid crystal display device, a ferroelectric liquid crystal display device, and an anti-ferroelectric liquid crystal display device. Of course.

Moreover, a DMD type liquid crystal display element etc. may be sufficient besides liquid crystal. The liquid crystal display itself is irrespective of its direct type or projection type.

Incidentally, in the present embodiment, the subframe is divided into two subframes, but more subframes may be used. In this case, although faster writing is required, the speed-up effect is high.

If the length of the subframe is changed at this time, gray scale display can be satisfactorily realized.

Specifically, for example, when dividing into three subframes, the first, second and third subframes are divided so as to have a length of 1: 2: 4, respectively.

Although the display content is 50% or more, the third subframe is turned ON. The second subframe is turned on when the value obtained by subtracting the number indicated by the third subframe from the display data exceeds 25%.

The first subframe displays a value obtained by subtracting the number indicated by the second and third subframes from the display data by the voltage adjusting method. That is, the first first subframe is performed by the voltage adjusting method, and the remaining subframes use the time division gradation display method of "number of subframes-1" bits.

This relationship is the same even if the number of subframes increases.

In this embodiment, although the subframe which performs the voltage adjustment method was made into the first subframe, of course, it is not limited to this.

This is because it is possible to insert the rest period wherever the subframe to which the voltage adjustment method is applied is placed.

(8th Embodiment)

This embodiment relates to a projection display using a chopper.

14 is a diagram conceptually showing the configuration of the display device of this embodiment. In this figure, 311 is a light source. 312 is a reflector. 313 is a chopper. 314 denotes a liquid crystal display element (or display device liquid crystal panel). 315 is a projection lens. 316 is a screen. In addition, the perimeter of an arrow and a thick arrow shows each light beam, a light beam, and their direction.

As can be seen from this figure, the light source light 311 with the reflector 12 becomes a substantially parallel luminous flux, which is incident on the liquid crystal panel 314. An image is formed on the liquid crystal panel 314, and the image is magnified by the projection lens 315 and projected onto the screen 316.

Here, as described above, the chopper 313 enters between the light source 311 and the liquid crystal panel 314.

As shown in Fig. 15, the chopper 313 has a rectangular hole 3131 formed in a sufficiently large disk, and the disk is rotated at high speed so that the light source light 311 can be opened through the opening 3131. This intermittently enters the liquid crystal panel 314.

The vertical length of the rectangular hole 3131 is smaller than the vertical length of the liquid crystal panel 314, and the light emitted by the light source at any moment illuminates a portion of the liquid crystal panel.

In the present embodiment, as shown in Figs. 15 and 16, the longitudinal size H of this hole is half that of 2H of the liquid crystal panel.

The chopper 313 was rotated such that the opening 3131 operates in the same direction as the scanning direction of the liquid crystal.

Further, as shown in Fig. 16, the rotation speed of the chopper is adjusted so that the scanning speed of the liquid crystal panel and the traveling speed of the hole not only coincide with each other, but also new data is written by scanning and the area where the hole is written. The phase was adjusted to illuminate.

In this way, new data is written to the liquid crystal panel, and at the same time, the image starts projecting the image at that point and projects for half the time (1/120 seconds) of one field.

After that, since it is shielded by the shield part of a chopper, light does not pass. The liquid crystal element of the horizontal portion indicated by 600 in FIG. 16 shines for image display, and at the same time, the tip of the opening 3131 of the chopper 313 comes to this position. And after 1/120 second elapses, the rear end of the opening comes to this horizontal portion.

Therefore, as shown in Fig. 17C, since the display stops for a certain period of time, the image is closer to the CRT.

In this figure, for comparison, the relationship between the brightness (candela, luxe, etc.) and time in the case of CRT (a) and in the case of normal liquid crystal (b) is shown.

By using this display device, even on a screen in which the image is switched at high speed, the image can be satisfactorily displayed at high speed without blurring.

In this embodiment, an OCB type liquid crystal device having a response speed of about 20 ms is used as the liquid crystal display device. According to the experiment, when the response speed of the liquid crystal device itself was slow, the effect was small, and the effect appeared was a liquid crystal device having a response speed of 30 ms or less.

Here, the response speed is the sum of the response time from dark to light and the response time from light to dark when alternating voltages of 10% transmitted light and voltages of 90% transmitted light are alternately applied. .

In addition, each response time is a useful time until it changes to 90% of the change of the transmitted light quantity.

In this embodiment, a liquid crystal display element is used, but this effect is similar to that of a DLP element. In other words, basically, a device that maintains the display state for one field period has the same effect.

Moreover, although the chopper of shielding light source light was used, of course, other mechanical shutters may be sufficient. In other words, any structure may be used as long as the opening moves in the scanning direction of the liquid crystal.

Using a mechanical shutter such as a chopper has the advantage of being the simplest structure. In the present embodiment, the light shielding portion of the chopper is made of an object that absorbs light.

In addition, the reflection of the light toward the light source side by using the reflector leads to the reuse of the light beam, thereby improving the brightness.

(Comparative Example)

A flush lamp was used in place of the light source and the chopper of this embodiment. In this case, the light flickers as in the present embodiment, but the flashing is not synchronized with the liquid crystal display.

Also in this case, although the effect of speed-up was seen, the effect of about this embodiment was not seen. This is because there is an area displaying the previous display data at the moment of lighting.

In the present embodiment, light transmission through the opening is performed for 1/2 cycle (1 cycle = 1/60 second) in synchronization with the display start direction of the horizontal scanning line of the liquid crystal display device. Therefore, good response that cannot be seen in the display of the movie (the entire screen is displayed at the same time) or the like has been obtained.

(Ninth embodiment)

This embodiment uses a liquid crystal shutter instead of the chopper in the previous embodiment.

18 conceptually shows a configuration of the projection type liquid crystal display device of this embodiment. In the figure, 341 is a liquid crystal shutter. In addition, about the other structure, the same code | symbol is attached | subjected about the same thing as a previous Example.

As shown in the figure, the projection display inserts a liquid crystal shutter 341 between the light source 311 and the liquid crystal display panel 314. This liquid crystal shutter has a structure in which a plurality of horizontal electrodes are lined up, and this was scanned in accordance with the scanning direction of the liquid crystal panel as shown in FIG.

And this liquid crystal shutter needs to be switched at high speed. Therefore, in this embodiment, a ferroelectric liquid crystal device and an OCB type liquid crystal device capable of high speed response are used.

And all the favorable characteristics were obtained. In addition, the response speed was 20 kW in the ferroelectric liquid crystal device, and the response speed was 10 ms in the OCB type liquid crystal device. Of course, it is possible to further increase the speed by increasing the driving voltage.

Moreover, it is preferable that a liquid crystal shutter is high transmittance. By the way, the above-described ferroelectric liquid crystal device or OCB type liquid crystal device uses a polarizing plate, so the transmittance is low.

On the other hand, scattering liquid crystals, such as a conventional polymer dispersed liquid crystal device, have a high light transmittance and thus have low light loss, but have high difficulty in high-speed response. Therefore, in this embodiment, the response speed 10ms was obtained using the high drive voltage of 30v.

As mentioned above, although the projection type display apparatus was demonstrated as an example in this embodiment, it cannot be overemphasized. That is, it is also possible to arrange | position a liquid crystal shutter on the back surface of a direct view type liquid crystal display element, and to acquire the effect of this invention.

In the present embodiment, since the liquid crystal shutter is used in comparison with the previous embodiment, the shutter means becomes almost the same size as the liquid crystal display element, and thus the whole can be miniaturized and can be easily applied to the direct-view display device. have.

(10th embodiment)

This embodiment is related to the projection type display similarly to the above two embodiments, but the scanning of light is performed by using a footnote mirror for the shutter means.

Fig. 20 conceptually shows the configuration of the projection display of this embodiment. In this figure, 361 is a footnote mirror. 362 is an integrator. In addition, since the other structure is the same as the previous two embodiment, the same code | symbol was attached | subjected.

As shown in this figure, the light emitted from the lamp 311 is converted into a square beam of light via the integrator 362, and is irradiated to the circumferential mirror 361 that rotates at high speed.

The reflected light is then irradiated onto the liquid crystal panel 316. However, at this time, the light beam changes the reflection direction in accordance with the high speed rotation of the circumferential mirror 361.

By making the scanning direction of the light reflected from the circumferential mirror 361 and the scanning direction of the liquid crystal panel 314 the same, good high-speed display is possible as described in the foregoing two embodiments.

In addition, when the foot mirror is used, unlike the chopper method or the liquid crystal shutter method, there is no loss of brightness in principle. Therefore, it is preferable at the point of utilization efficiency of light.

In addition to the above, a micromirror device (manufactured and released by Texas Instruments, etc.) may be used to display the angle of the micromirrors formed on the conductor crystal by electrically moving.

(Eleventh embodiment)

In this embodiment, successive video images are analyzed and their motion is detected to form intermediate images by vector computation.

21 shows the operation of the video vector to be the object of this embodiment.

In the present embodiment, as shown on the left side of FIG. 21, the screen 1, the screen 2, the screen 3. In succession, successive images with motion are input. In this case, the motion is classified into when the motion between the images is small and when the motion is large.

Only when the motion is large, the intermediate image is displayed by focusing on the motion vector.

In the case of the input images shown on the right (1), (2), and (3) of Fig. 21, the three input images (1), (2), and (3) are large in motion with each other, As shown, images (1.5) and (2.5) having intermediate movements were inserted.

As a result, good display performance was obtained.

22 shows the configuration of the liquid crystal display device of this embodiment. In this figure, 401 is a receiver. 402 is a buffer for a pre-input image and consists of F1FO in one screen portion. 403 is an operation comparison unit which detects and compares motion between frames before and after each other. 404 is a judging section for judging the necessity of creating an intermediate image by comparing the movement with a threshold value that separately holds the comparison result of the comparing section. 405 is an intermediate image preparation unit for creating an intermediate image when the judgment unit determines that it is necessary to create an intermediate image. 406 is a display control unit. When the intermediate image creating unit creates an intermediate image, the display control unit causes the display time of the previous image received by the receiving unit to be half a field, and then displays the intermediate image by the remaining half field. . 407 is a display unit using liquid crystal.

Next, the processing content and operation of the operation comparison unit will be described in detail.

The operation comparison unit of the present embodiment takes the sum (absolute value) of the differences for each pixel of the screens that are continuous with each other, and detects the difference in comparison with a threshold value held separately.

In addition to the above, the viewer usually pays attention to the brightest pixel for each pixel that is most noticeable and takes the difference in the change of the position. There are various means such as placing importance on the pixel in the center of the screen.

However, some of these are techniques employed in MPEG and the like as described in Fig. 21, for example. Therefore, further description is omitted.

And this embodiment is also an application of 2nd Embodiment shown to FIGS. 4-6 in some aspects. Therefore, the above description of this embodiment is omitted.

(12th Embodiment)

This embodiment relates to a machine and a circuit for displaying a black screen.

The circuit of this embodiment is shown in FIG. 23 compared with the conventional one. 23A is a circuit of this embodiment, and 23B is a circuit of the prior art.

In this figure, 511 is TFT. 512 is a pixel electrode. 513 is a gate line. 514 is a source line. 515 is a discharge means. 516 is a counter electrode. 517 is the reference potential (line, earth).

In the display element using the conventional active matrix, the pixel electrode 512 is connected through the TFT 511 as shown in Fig. 23B.

When the pixel electrode is charged, the TFT 511 is turned on to apply the high potential to the gate line 513 so that the source line 514 and the pixel electrode 512 become conductive.

In this case, a predetermined voltage is applied to the pixel electrode by applying a predetermined voltage to the source line. Next, the TFT transistor is turned OFF by applying a low potential to the gate line. At this time, since the source line and the pixel electrode become high resistance, the pixel electrode is opened. At this time, the counter electrode 516 is connected to the reference potential (earth) 517.

Since charges accumulate between the counter electrode and the pixel electrode and have high resistance between the counter electrode and the pixel electrode, the charge is maintained for a period until the next charge is made. Therefore, while the constant voltage is applied between the pixel electrode and the counter electrode, the transmittance is constant. The transmittance at this time was as shown in Fig. 24B.

FIG. 24A is a diagram conceptually illustrating a case of comparing the same display in the CRT. In this figure, the case where the pattern which gradually increases brightness is applied is shown.

24C is a diagram showing a circuit of the display element of this embodiment. This embodiment is characterized in that a resistor 515 as a discharge means is inserted between the pixel electrode 512 and the reference potential 517.

This resistance gradually discharges the charge accumulated between the pixel electrode and the counter electrode, and discharges the charge before the next writing occurs.

In addition, the discharge time at this time is based on CR time constant. This obtained the transmittance | permeability as shown in FIG. 20C. As a result, fast response similar to that of CRT was obtained.

(Thirteenth Embodiment)

This embodiment is similar in purpose to the previous embodiment, but is characterized in that a resistor for leaking the potential of the pixel electrode of the TFT array is added.

The structure of this embodiment is shown in FIG. As shown in the figure, in this array configuration, the reference potential wiring 531 of the same potential as the counter electrode is dragged in parallel with the gate line 513, and a resistance (a) is formed between the wiring 531 and the pixel electrode 512. 532) is inserted.

The resistance was an amorphous silicon layer doped with only a proper amount of impurities. At this time, in the state where the voltage was not applied, the display used the normally black mode which is a dark state.

Thereby, favorable display performance was obtained similarly to the previous embodiment.

(14th Embodiment)

This embodiment has the same purpose as the previous two embodiments, but is characterized in that the charge of the pixel electrode is discharged by lowering the resistance value of the liquid crystal layer.

In order to reduce the resistance of the liquid crystal layer, an ionic substance may be added to the liquid crystal. At this time, the retention rate which a liquid crystal has is effective as it is 50% or less. Moreover, at this time, the auxiliary capacitance normally formed in a liquid crystal element was made small, and it was effective by making it equal or smaller than a pixel capacitance.

Moreover, the electrical conductivity of the liquid crystal layer is effective at 10 ⁻¹⁰ (Ωcm) ⁻¹ or more, and preferably 10 ⁻⁸ (Ωcm) ⁻¹ or more.

At this time, the display used the normally black mode which is a dark state in the state which a voltage is not applied.

The conceptual circuit structure of this embodiment is shown in FIG. In this figure, 533 is a resistance of the liquid crystal layer itself. However, since lowering the resistance value of the liquid crystal layer itself is not such a difficult technique, the above description of this embodiment is omitted.

(15th Embodiment)

This embodiment is substantially the same as the previous two embodiments, but relates to the "normally white mode".

That is, although the previous two embodiments were "normally black mode", of course, this embodiment is not limited to this. That is, the "normally white mode" in which the display is in the "bright state" in the state where the voltage is not applied may be possible.

By the way, in the normally white mode, it is necessary to apply a relatively high voltage to display black. Therefore, after discharging the pixel electrodes, it is necessary to provide a circuit that converges to a high voltage.

Thus, in the present embodiment, as shown in Fig. 27, a power supply line 542 for supplying a black voltage is formed, and this and the recovery electrode 512 are connected through a resistor.

In addition, in this figure, 542 is a power supply line which supplies black voltage. 541 is a power supply line. 543 is a TFT for dislocation holding.

A high voltage is applied to this power supply line 542 and held by the TFT transistor.

In addition, VH and VL are alternately applied to the power supply line 541, and this voltage corresponds to the black display voltage when it is applied to the source line. Then, the electrode line 542 supporting this was formed, and this potential was held by the TFT transistor 543. Since the pixel electrode is connected to this power supply line 541 through a resistor, the pixel electrode realizes the characteristic of saturation toward the black voltage and high speed even in the normally white mode.

In general, the electric field supplied to the pixel electrode, that is, the electric field supplied to the signal line, is often changed in polarity for each screen and one field of the image.

At this time, the sign of black display voltage is also switched, for example, + 6V and -6V. Here, a waveform in which the power supply voltage value is switched for each field is applied to the power supply line 542. For example, in the above example, an alternating electric field between + 6V and -6V is applied.

It goes without saying that the present embodiment is not limited to one field inversion driving. That is, the system may be reversed at high speed, such as H inversion driving, in which polarity is switched every 1 (1 horizontal line). It is necessary here to apply a voltage corresponding to the black display of the source signal to the power supply line 542.

Moreover, it is not limited to the liquid crystal display element of a narrow meaning, It may be an EL type display element. Moreover, any liquid crystal mode may be sufficient, and a TN liquid crystal, an IPS liquid crystal, an OCB liquid crystal, or a VA liquid crystal may be sufficient as it.

In addition, the faster the responsiveness of the liquid crystal mode, the higher the effect of speedup. Therefore, TN mode, IPS mode, or high speed OCB mode, which is basically high speed, is suitable. Moreover, the EL element is basically high speed, and the effect of the present invention was high.

If the element is high speed, it can respond to the electric field to be discharged, and thus high speed can be realized. The response speed of the device when the black-and-white response was made was effective when the response time filling the rise time and fall time of the response time was 16sm or less.

(16th Embodiment)

This embodiment is similar to the seventh embodiment, except that the application time of the voltage pulse to be applied within one field time is adjusted depending on the gradation of the image.

28 shows the operation of the hold display element of this embodiment. FIG. 28A is a gray level of the pixel in the first, second, third, and fourth field times.

FIG. 28B shows the relationship between the applied voltage and time in the first, second, third, and fourth field time for FIG. 28A.

In this figure, for example, in the second field time, the gradation is 1/3 as shown in Fig. 28A, and therefore, as shown in Fig. 28B, the first 1/3 of the total T in the second field time interval is shown. Only 100% of the time interval is applied.

By this, a good display of a moving picture was obtained. However, the circuit configuration for exerting this action is merely changing the time interval instead of the voltage adjustment depending on the gradation, and since the contents are simple, the illustration is omitted.

(17th Embodiment)

This embodiment relates to the product which combined several above embodiments.

This is shown in FIG. As shown in this figure, the display device not only achieves display corresponding to moving and still images, but also displays appropriately according to the contents of the program.

Therefore, image compression such as MPEG can also be used, and high-vision and the like can be appropriately displayed.

As mentioned above, although this invention was demonstrated according to some embodiment, it cannot be overemphasized that this invention is not limited to these. That is, for example, you may do as follows.

1) The display is not limited to 60 screens per second, and the pixel density is, for example, high-vision compatible.

2) The liquid crystal is made to be other than OCB mode.

3) In the sixth embodiment, the display surface is further divided. Alternatively, only the center is in OCB mode.

4) The displayed moving picture is recorded on a tape or disc.

5) The intermittent drive is made to double the field frequency. Therefore, in this case, the left half of the odd numbered screens, the right half of the odd numbered screens, and the left half of the even numbered screens are displayed in the order of the right half.

6) The pixel position to be sampled as a moving object is also selected according to the contents of the broadcast program.

7) When a plurality of most bright points exist as a motion vector, the function of noting that the maximum number of pixels is added is added.

8) Polarity reversal is done per unit compartment.

9) The determination of moving picture or still picture is made based on the presence or absence of the gradation change of the pixel of several predetermined positions.

10) If the change of the gradation is less than the threshold value, the moving image is displayed in the same way as the still image.

11) The detection of the motion vector adds a function of changing an object according to a news program, a live broadcast of a sport, or the like. The program or the like is stored in advance in a separate program table, and is compared with a built-in calendar or timer.

12) The light emitting body as a backlight is made of LED, semiconductor laser, electroluminescent sense and the like which are excellent in response to luminance change.

13) An electro-optic crystal such as bismuth silicon oxide is used as a hold display device.

14) The display device itself is not held.

As described above, in the present invention, particularly in a hold display device such as a liquid crystal display device, it is possible to easily perform moving images and display images with low cost.

In addition, by switching the display method corresponding to the moving picture and the display method corresponding to the still image, either type of display can be supported and good display can be obtained.

In addition, since the wide and thin display device can be used as a display part (part) common to various devices such as a television and a word processor, the use is also expanded.

In addition, since the display surface is divided and displayed appropriately in accordance with the type of screen, the apparatus is inexpensive without degrading the quality of moving pictures.

Claims (128)

Moving means for causing the display means to display the moving subject; Similarly, the stationary driving means for displaying the stationary subject, And a switching means for switching the both means by a predetermined method. The method of claim 1, wherein the display means, It is a display means using a liquid crystal, The drive means for assimilation A display apparatus comprising a moving image liquid crystal driver for driving a liquid crystal corresponding to a moving image or a moving image lighting driver for illuminating a moving image corresponding to a display means using the liquid crystal when displaying an image. The method of claim 1, wherein the drive means for assimilation, Intermediate image creation means for creating an intermediate image based on two image data or the like successive to each other, and A medium image insertion small means for inserting and displaying the created intermediate image between two successive images in a moving picture display; A display device characterized in that it has a small field frequency shortening adjustment means for changing the display time of a moving picture despite the insertion of the intermediate picture by reducing the display interval of one picture. The method of claim 1, wherein the drive means for assimilation, And an intermittent drive display drive means for displaying a screen by intermittent drive. The method of claim 1, wherein the drive means for assimilation, And a high field frequency display means for displaying a moving picture by raising the field frequency higher than that of a still image. The method of claim 1, wherein the drive means for assimilation, A display apparatus characterized by being a drive means for moving the shutter time division using at least one of a shutter method and a time division gradation display method. According to claim 2, The lighting driver for moving picture, Display of each image WHEREIN: The display apparatus which has the short-term lighting baking part which lights up a display light shorter than the period corresponding to a field frequency. According to claim 2, The lighting driver for moving picture, Display apparatus comprising a pulse lighting unit for lighting a pulse in every screen for moving picture display The method according to any one of claims 1 to 8, wherein the switching means, And an automatic switching means which detects this in a predetermined order and automatically switches to the moving means for moving when receiving a video signal. The method of claim 9, wherein the automatic switching means, And a differential detection type automatic switching means for detecting a moving screen at least prior to the display by at least the difference with the front screen and driving the moving picture based on this. The driving means for stopping according to any one of claims 1 to 8, A display apparatus characterized by having a normal lighting unit for lighting a light source such as display light during a period corresponding to a field frequency when displaying a still image. 10. The method of claim 9, wherein the driving means for stopping, A display apparatus characterized by having a normal lighting unit for lighting a light source such as display light during a period corresponding to a field frequency when displaying a still image. The method of claim 10, wherein the driving means for stopping, A display apparatus characterized by having a normal lighting unit for lighting a light source such as display light during a period corresponding to a field frequency when displaying a still image. The display means according to any one of claims 1 to 8, wherein A liquid crystal display device, wherein the liquid crystal display device is a high-speed response device whose response time is faster than at least one field period. The method of claim 9, wherein the display means, A liquid crystal display device, wherein the liquid crystal display device is a high-speed response device whose response time is faster than at least one field period. The method of claim 10, wherein the display means, A liquid crystal display device comprising a liquid crystal, wherein the liquid crystal display element is a high-speed response element whose response time is faster than at least one field period. The method of claim 11, wherein the display means, A liquid crystal display device comprising a liquid crystal, wherein the liquid crystal display element is a high-speed response element whose response time is faster than at least one field period. The method of claim 12, wherein the display means, A liquid crystal display device comprising a liquid crystal, wherein the liquid crystal display element is a high-speed response element whose response time is faster than at least one field period. The method of claim 13, wherein the display means, A liquid crystal display device comprising a liquid crystal, wherein the liquid crystal display element is a high-speed response element whose response time is faster than at least one field period. The display means according to any one of claims 1 to 8, wherein A moving picture compatible display portion formed as a part of the display surface; It consists of the still image display part which consists of a remainder display surface, The drive means for assimilation, In the case of a moving picture, the moving picture display part is a moving picture drive means for causing the moving picture display part to be displayed on the moving picture compatible display part. The switching means, A judgment decimal step for judging whether the image data to be displayed is a moving picture or a still picture, and And if the judging means determines that it is a moving picture, the display portion moving picture driving means has a display surface partial moving drive control means for causing a display of an appropriate moving subject to be displayed on the moving picture-compatible display part of the display surface. Display device. 21. The display device according to claim 20, wherein the moving picture compatible display portion comprises: And a center portion of the screen. Moving means for causing a display of the moving subject on the holding display means; Similarly, the stationary driving means for displaying the stationary subject, And a switching means for switching the both means by a predetermined method. 23. The method of claim 22, wherein the drive means for assimilation, An intermediate image creating means for creating an intermediate image based on two image data or the like continuous with each other; A medium image insertion means for inserting and displaying the created intermediate image between two successive images in a moving picture display; A display device characterized in that it has a small field frequency shortening adjustment means for changing the display time of a moving picture despite the insertion of the intermediate picture by reducing the display interval of one picture. 23. The method of claim 22, wherein the drive means for assimilation, And an intermittent drive display drive means for displaying a screen by intermittent drive. 23. The method of claim 22, wherein the drive means for assimilation, And a high field frequency display portion for displaying moving pictures by raising the field frequency higher than that of the still image. 23. The method of claim 22, wherein the drive means for assimilation, A display apparatus characterized by being a drive means for moving the shutter time division using at least one of a shutter method and a time division gradation display method. 23. The method of claim 22, wherein the moving light driving unit, Display of each image WHEREIN: The display apparatus which has the short-term lighting baking part which lights up a display light shorter than the period corresponding to a field frequency. 23. The method of claim 22, wherein the moving light driving unit, Display apparatus comprising a pulse lighting unit for lighting a pulse in every screen for moving picture display The method according to any one of claims 22 to 28, wherein the switching means, And an automatic switching means for detecting this in a predetermined order and automatically switching to the moving means for moving when displaying an image. The method of claim 29, wherein the automatic switching means, And a differential detection type automatic switching means for detecting a moving screen at least prior to the display by at least the difference with the front screen and driving the moving picture based on this. 29. The stationary driving means according to any one of claims 22 to 28, A display apparatus characterized by having a normal lighting unit for lighting a light source such as display light during a period corresponding to a field frequency when displaying a still image. 30. The method of claim 29, wherein the driving means for stopping, A display apparatus characterized by having a normal lighting unit for lighting a light source such as display light during a period corresponding to a field frequency when displaying a still image. 31. The method of claim 30, wherein the driving means for stopping, A display apparatus characterized by having a normal lighting unit for lighting a light source such as display light during a period corresponding to a field frequency when displaying a still image. The display means according to any one of claims 22 to 28, wherein A display device characterized by using a fast response element whose response time is at least one field period. The method of claim 29, wherein the display means, A display device characterized by using a high speed response device having a response time of at least one field period. The method of claim 30, wherein the display means, And a high-speed response element whose response time is at least one field period is used. 32. The apparatus of claim 31, wherein the display means is And a high-speed response element whose response time is at least one field period is used. The method of claim 32, wherein the display means, And a high-speed response element whose response time is at least one field period is used. The method of claim 33, wherein the display means, And a high-speed response element whose response time is at least one field period is used. The display means according to any one of claims 22 to 28, wherein A moving picture compatible display portion formed as a part of the display surface; It consists of the still image display part which consists of a remainder display surface, The drive means for assimilation, In the case of a moving picture, the moving picture display part is a moving picture drive means for causing the moving picture display part to be displayed on the moving picture compatible display part. The switching means, Determination means for determining whether the image data to be displayed is a moving picture or a still picture, and And if the judging means judges that it is a moving picture, the display portion moving picture driving means has a display surface partial moving picture drive control minority stage, which causes the moving picture corresponding display part of the display surface to display an appropriate moving subject. Device. 41. The display device as claimed in claim 40, wherein the moving picture compatible display portion comprises: And a center portion of the screen. In the gradation display method of the display device, A gradation display method characterized by using a voltage adjustment method and a time division gradation display method together, The method according to claim 42, wherein in the gradation display method of the display device, When the period of the video signal displayed by the display device is one field, the one field is divided into a plurality of subfields, at least one of the subfields is performed by the voltage adjustment method, and the other subfields are performed by the time division gradation display method. A gradation display method of a display device, characterized in that. The method of claim 43, wherein the number of the plurality of subfields is two. 45. The gradation display method according to any one of claims 42 to 44, wherein an application time of a voltage pulse to be applied is adjusted in accordance with any of gradation degrees of an image to be displayed. 45. The method according to any one of claims 42 to 44, wherein when the gradation degree of the moving picture to be displayed is less than or equal to half of the maximum value, a pause period of one half of one field is inserted in the first half or the second half thereof. The gradation display method of the display device. The gradation of the display device according to claim 45, wherein when the gradation degree of the moving image to be displayed is less than or equal to half of the maximum value, a pause period of one half of one field is inserted in the first half or the second half thereof. How to display. 45. The display device of claim 42, wherein the display device comprises: A gradation display method of a display device, characterized in that it is of a hold type. The display device of claim 45, wherein the display device comprises: A gradation display method of a display device, characterized in that it is of a hold type. The display device of claim 46, wherein the display device comprises: A gradation display method of a display device, characterized in that it is of a hold type. Means for dividing one field into a plurality of subfields for display in accordance with the gradation degree of each image of a moving picture to be displayed; A voltage adjustment display acting means for adjusting the voltage determined in the gradation degree to display on the display means for at least one divided subfield of the means to be divided by the field; And a time division gradation display means for causing the display means to display the time division gradation display determined in the gradation diagram for the other subfields. The method of claim 51, wherein the plurality of subfields are equal to two of equal time intervals, The time division gradation display means, And a time division gradation display means corresponding to 50% or more for displaying a subfield of 1 as 100% gradation only when gradation is 50% or higher. A gradation degree detecting means for detecting a gradation degree of each image of a moving picture to be displayed for each field; Application time interval determination means for determining a time interval for applying a voltage for each field based on the detected gray level; And a gradation degree corresponding voltage application means for applying a predetermined voltage to the beginning or end of one field only at a predetermined time interval of the application time interval determination means. The display device according to any one of claims 51 to 53, wherein A display device characterized by using a hold display element for a pixel as display means. The display device according to any one of claims 51 to 53, wherein And a high speed response display means having a response time of an element of the display unit of 16 ms or less. The display device of claim 55, wherein the display device is A display device characterized by using a hold display element for a pixel as display means. The display device according to claim 55, wherein the high speed response type display means comprises: A display device comprising liquid crystal display means. The display means according to claim 57, wherein the display means using the liquid crystal, A display device comprising display means using liquid crystal in an OCB mode. The display means according to claim 57, wherein the display means using the liquid crystal, A display device using ferroelectric liquid crystal. The display means according to claim 57, wherein the display means using the liquid crystal, A display device using antiferroelectric liquid crystal. A display device having a light source, shutter means, and display means for displaying a moving picture, The shutter means, In the display of an image, when the light emitted from the light source enters the display means through the shutter means, the state of transmitting the light from the light source, the state of shielding, and the state corresponding to displaying each image are switched in a predetermined order. Display device characterized in that the transmission shield switching means. 62. The method of claim 61, wherein the switching of the shutter means, which is the transparent shield switching means, A display device characterized in that the period is synchronized with the screen update time of the display means. The method of claim 62, wherein the shutter means, And a scanning direction corresponding shutter means whose scanning direction is the same as the scanning direction of the display means. The method of claim 61, wherein the shutter means, A display device, characterized in that the liquid crystal shutter. The method of claim 64, wherein the liquid crystal shutter, A display device comprising a liquid crystal shutter using a ferroelectric liquid crystal. The method of claim 64, wherein the liquid crystal shutter, A liquid crystal shutter using an OCB type liquid crystal. The method of claim 64, wherein the liquid crystal shutter, A display device comprising a liquid crystal shutter using a scattering liquid crystal. 63. The method of any of claims 61 to 63, wherein the shutter comprises: Display device characterized in that the mechanical shutter. The method of claim 68, wherein the mechanical shutter, And a wheel having an opening having a predetermined dimension and shape corresponding to the dimension and shape of the display surface of the display means and rotating at a predetermined angular speed. The display device of claim 61, wherein the display device comprises: A display device characterized by using a hold display element for a pixel as display means. The display device of claim 68, wherein the display device is A display device characterized by using a hold display element for a pixel as display means. The display device of claim 69, wherein the display device comprises: Display device characterized in that a hold display element is used for a pixel as display means A display device having a light source, a beam scanning means, and display means for displaying a moving image, The beam scanning means, And a periodic switching light beam scanning means for periodically switching the traveling direction of the light source light corresponding to the display of each image when the light emitted from the light source enters the display means via the light beam scanning means. 74. The method of claim 73, wherein the light beam scanning means, And a rotation angle mirror which directs the light source light reflected by the display means in response to the switching of the image. The method of claim 74, wherein the rotation angle mirror, Display device characterized in that the small rotating angle mirror. 76. A display device according to any one of claims 73 to 75, wherein the display means is A display device comprising liquid crystal display means. The method of claim 76, wherein the display means, A display apparatus characterized by having a high-speed response display element having a response speed of the element of 30 ms or less. 78. The display device of claim 77, wherein the high speed response display device comprises: A display device using a liquid crystal in OCB mode. 78. The display device of claim 77, wherein the high speed response display device comprises: A display device using a liquid crystal in a ferroelectric mode. 78. The display device of claim 77, wherein the high speed response display device comprises: A display device using a liquid crystal in an antiferroelectric mode. 76. The display device of claim 73, wherein the display device comprises: Display device characterized in that the projection display device. The display device of claim 76, wherein the display device is Display device characterized in that the projection display device. 78. The display device of claim 77, wherein the display device is Display device characterized in that the projection display device. 79. The display device of claim 78, wherein the display device is Display device characterized in that the projection display device. The display device of claim 79, wherein the display device comprises: Display device characterized in that the projection display device. 76. The display device of claim 73, wherein the display device comprises: A display device comprising a hold type display element for a pixel as display means. 78. The display device of claim 77, wherein the display device is A display device comprising a hold type display element for a pixel as display means. 82. The display device of claim 81, wherein the display device A display device comprising a hold type display element for a pixel as display means. 82. The display device of claim 82, wherein the display device is A display device comprising a hold type display element for a pixel as display means. 76. The display device of claim 73, wherein the display device further comprises: Intermediate interpolation image creating means for creating at least one intermediate image to be inserted in the middle of two consecutive images, based on at least the two consecutive image data; Display image group creating means for inserting the created at least one intermediate image between the two consecutive images, and creating a group of images to be displayed thereby; And a display speed control means for sequentially displaying the created display image group at the same moving speed as in the case where the intermediate image is not inserted by shortening the display time per image. . 87. The display device of claim 86, wherein the display device further comprises: Intermediate interpolation image creating means for creating at least one intermediate image to be inserted in the middle of two consecutive images, based on at least the two consecutive image data; Display image group creating means for inserting the created at least one intermediate image between the two consecutive images, and creating a group of images to be displayed thereby; And a display speed control means for sequentially displaying the created display image group at the same moving speed as in the case where the intermediate image is not inserted by shortening the display time per image. . In a display device for displaying a moving picture, Intermediate interpolation image creating means for creating at least one intermediate image to be inserted in the middle of two consecutive images, based on at least the two consecutive image data; Display image group creating means for inserting the created at least one intermediate image between the two consecutive images, and creating a group of images to be displayed thereby; And a display speed control means for sequentially displaying the created display image group at the same moving speed as in the case where the intermediate image is not inserted by shortening the display time per image. . 93. The apparatus according to claim 92, wherein the intermediate insertion image creating means is A data storage means for storing video data of at least two screens; Computing means for computing the video data of the data storage decimal stage; A display device comprising a calculation result utilization fractional fraction which uses the result of calculation of the fractional fraction to generate an intermediate inserted image. 93. The apparatus according to claim 92, wherein the intermediate insertion image creating means is And an average image generating means employing the average image for generating the intermediate image based on the average value of the before and after moving images and the interpolation value. 93. The apparatus according to claim 92, wherein the intermediate insertion image creating means is And an operation-use intermediate image creation means for creating an intermediate insertion image by detecting an operation based on at least the preceding and subsequent data. 93. The apparatus according to claim 92, wherein the intermediate insertion image creating means is And a motion vector-focused intermediate image creating means for generating an intermediate image by focusing on a motion vector between each image of which motion has been detected based on at least the preceding and subsequent image data. 98. The display device of claim 92, wherein the display device comprises: A display device comprising liquid crystal display means using liquid crystal as display means. 98. The liquid crystal display device of claim 97, wherein the liquid crystal display means, A display device comprising display means using liquid crystal in an OCB mode. 98. The liquid crystal display device of claim 97, wherein the liquid crystal display means, A display device using ferroelectric liquid crystal. 98. The liquid crystal display device of claim 97, wherein the liquid crystal display means, A display device using antiferroelectric liquid crystal. 98. The display device of claim 92, wherein the display device comprises: A display device comprising a hold type display element for a pixel as display means. A plurality of pixels are arranged side by side in the vertical and horizontal directions, thereby having a moving picture corresponding display means capable of displaying a moving picture. An electric field applying means for applying an electric field, Electric field holding means for maintaining the applied electric field; A display element for displaying by electric field application, And discharge means for discharging the electric field held by the electric field holding means within a predetermined time. 103. The electric field holding means of claim 102, 1 field electric field holding means for maintaining an applied electric field by 1 field, The discharge means, And one field discharge means for discharging an electric field held by said one field electric field holding means within one field. 102. The display device of claim 102, wherein the display device is And an active matrix substrate having a TFT for driving said electric field applying means, said electric field holding means, and a display element or constituting a part thereof. 105. The display device according to any one of claims 102 to 105, wherein the discharge means is formed on the active matrix substrate. 105. The display device of claim 102, wherein the display element is A display device using liquid crystal. 105. The display device of claim 102, wherein the display element is A display device characterized by being an EL display element. 107. The method of any one of claims 102-105, wherein the discharging means is A display device characterized in that the material itself constituting the display element existing in the portion of the electric field applying means that applies a high electric field is a display element combined discharging means that discharges by an appropriate resistance to perform a function. 107. The method of claim 106, wherein the discharge means, A display device characterized in that the material itself constituting the display element existing in the portion of the electric field applying means that applies the electric field is a display element combined discharge means that discharges by an appropriate resistance and exerts a function. 107. The apparatus of claim 107, wherein the discharge means is A display device characterized in that the material itself constituting the display element existing in the portion of the electric field applying means that applies the electric field is a display element combined discharge means that discharges by an appropriate resistance and exerts a function. 109. The display device according to claim 108, wherein the electrical conductivity of the resistance of the discharge means combined with the display element is 10 ^-10 (Ωcm) ^-1 or more. 109. The display device according to claim 109, wherein the electrical conductivity of the resistance of the discharge means combined with the display element is 10 ^-10 (Ωcm) ^-1 or more. 119. The display device according to claim 110, wherein the electrical conductivity of the resistance of the discharge means combined with the display element is 10 ^-10 (Ωcm) ^-1 or more. 103. The method of claim 102 or 103, wherein the active matrix substrate, A pixel electrode, And a storage capacitor having a smaller capacitance than the pixel electrode. 103. The method of claim 102 or 103, wherein the active matrix substrate, Display device characterized in that it does not have a subcapacity. 107. The display device according to any one of claims 102 to 105, wherein A display device characterized by using a hold display element for a pixel as display means. A plurality of pixels are arranged side by side in the vertical and horizontal directions, thereby having a moving picture corresponding display means capable of displaying a moving picture. An electric field applying means for applying an electric field, Electric field holding means for maintaining the applied electric field; A display element which is displayed by application of an electric field and is black when the electric field is low, And discharge means for discharging the electric field held by the electric field holding means within a predetermined time. 118. The electric field holding means according to claim 117, 1 field electric field holding means of maintaining an approved electric field by 1 field, The discharge means, And one field discharge means for discharging the electric field held by the one field electric field holding means within one field. 118. A display device according to claim 118, having a black display voltage supply means for supplying a black display voltage. A plurality of pixels are arranged side by side in the vertical and horizontal directions, thereby having a moving picture corresponding display means capable of displaying a moving picture. An electric field applying means for applying an electric field, Electric field holding means for maintaining the applied electric field; A display element which is displayed by applying an electric field and which becomes white when the electric field is low; And discharge means for discharging the electric field held by the electric field holding means within a predetermined time. 119. The apparatus of claim 120, wherein the field holding means is 1 field electric field holding means of maintaining an approved electric field by 1 field, The discharge means, And one field discharge means for discharging the electric field held by the one field electric field holding means within one field. 118. A display device according to claim 120, further comprising a black display voltage supply means for supplying a black display voltage. 122. The display device of claim 120, wherein the display device comprises: A display device using liquid crystal in an OCB mode. The display device of claim 117, wherein the display device is A display device comprising a hold type display element for a pixel as display means. As a driving method of a display device in which a plurality of pixels are arranged side by side in the vertical and horizontal directions, thereby having a moving picture corresponding display means capable of displaying moving pictures, and displaying by applying an electric field, An electric field in gas step for applying an electric field to a display element of said moving picture corresponding display means for display; An electric field holding step for holding the applied electric field; A discharge step of discharging the held electric field within a predetermined time; An alternating step of alternating the polarity of the electric field applied by the electric field in gas step according to a predetermined rule; And a display element alternate discharge path supply step for supplying a voltage synchronized with the alternating electric field as a discharge path of the display element discharged in the discharge step. 126. The apparatus of claim 125, wherein the display means is A display device driving method comprising: a hold type display device. As a display device to display by electric field application, An electric field applying means for applying an electric field, Electric field holding means for maintaining the applied electric field; Discharge means for discharging the held electric field within a predetermined time; Discharge potential supply means for supplying a discharge potential to exhibit the action of the discharge means; Alternating polarity control means for controlling to apply an electric field by alternating the polarity of the voltage to the electric field applying means; And alternating discharge potential applying means for applying a voltage synchronized with said alternating electric field to said discharge potential supply means. 127. The display device of claim 127, wherein A display device comprising a hold type display element for a pixel as display means.