WO2000067248A1

WO2000067248A1 - Display

Info

Publication number: WO2000067248A1
Application number: PCT/JP2000/002868
Authority: WO
Inventors: Tsuyoshi Uemura; Kenji Nakao; Seiji Nishiyama; Mika Nakamura; Katsuji Hattori
Original assignee: Matsushita Electric Industrial Co., Ltd.
Priority date: 1999-04-28
Filing date: 2000-04-28
Publication date: 2000-11-09
Also published as: KR20010053114A; CN1302425A; TW548477B

Abstract

Either a dynamic image or a still image is displayed excellently on a display of, especially, a hold type. When a dynamic image is displayed, a drive method, an illuminating method suitable for a dynamic image, including creation of an intermediate image and intermittent drive, or a combination of the methods are used. For example, when a still image is mainly displayed on an OA screen, an ordinary method for driving a liquid crystal is adopted. When an image is displayed, it is judged whether the image is a dynamic image or a still image, and a corresponding drive is carried out. The gradation display of an image is also contrived.

Description

Description ^

Technical field

The present invention relates to a hold-type liquid crystal display device, and more particularly to a hold-type liquid crystal display device for displaying a moving image or displaying a moving image and a still image separately, for example, a liquid crystal display device. About. Background technology

(General background technology)

It has been said that liquid crystal display devices using conventional active matrix type TN liquid crystal display have a slow response, but in recent years the development of liquid crystal materials such as the development of OBC type liquid crystal has been said. With the progress, the display response time has been dramatically improved.

For this reason, the use of liquid crystal display devices for large-scale television devices has been studied and developed, but the driving method in this case has been closed. It has been pushed. In other words, in a high-speed display on a liquid crystal display device, the pixel performs a hold-type display. Here, the problem of the hold-type display element is described in detail in the following Reference Document 1, and therefore, the minimum necessary description will be given in this specification.

References 1 Yashiro Kurita, “Display Method of Hold-Type Display and Image Quality for Moving Image Display,” The Liquid Crystal Society of Japan, Proceedings of the 1st LCD Forum -0 8)

First, a hold-type display will be described.

As shown in Fig. 1 (a), CRT (cathode ray tube, so-called brown tube) In the pulse type display such as, each pixel has one field period (the time required to display one screen, the time required for normal television broadcasting, etc.). A strong light is emitted for display only for a small part of the time (currently 1/60 second). On the other hand, as shown in FIG. 1 (b), in the liquid crystal display device, the light used for the display is held (held) for almost one field period.

Note that, in this (b), the solid line is the change in luminous intensity in an ideal case, and the broken line is the change in actual luminous intensity. Although it is shown only conceptually due to the space requirement, the brightness of the CRT shown in (a) is much higher than that of the liquid crystal shown in (b). high .

In this case, in the case of the hold type display, the time from when the pixel starts emitting light to when the pixel reaches the rated luminous intensity, or conversely, when the dimming starts, the pixel is completely stopped. Even if the response time, which is the time until darkness, is as fast as 0 ms as shown by the solid line, when displaying a moving image, it is blurred due to the integration effect of the human eyes It is also known that the responsiveness of the screen is delayed (this is also described in the above-mentioned reference 1). Here, the integration effect of the human eye is a physiological (psychological) effect in which a moving image composed of several pixels or an image is recognized on average. This is a kind of afterimage effect. The cause of this will be described very simply with reference to FIG.

In (1) of FIG. 2, it is assumed that the black circle 61 displayed on the upper left of the display surface 91 1 has moved to the position of the black circle 62 on the lower right in the following cases. In this case, as shown in (2), if it is a CRT, a black circle 61 is displayed in the upper left corner of only a part of one field period indicated by the up and down arrows. Other periods are not displayed as black circles as shown to the right. Next, a black circle 62 is displayed at the lower right position in a very small part of the next field period. In this case, the human eye recognizes that the black circle is moving to the lower right due to the flow before and after the video (not shown). Moving down also looks smooth.

However, in the liquid crystal display device, the black circle 61 is continuously displayed at the upper left of the screen throughout one field period, so that the next one field is displayed. Even if a black dot 62 is displayed in the lower right during the C period, it is difficult to recognize the movement of the black dot. In other words, although it is recognized that the black circle is moving to the lower right due to the flow of the video not shown in the head, it is actually displayed as stationary for a certain period of time. Continuing to do so creates confusion in the mind. As a result, a poke of the video, a delay in responsiveness of the movement, and the like occur.

Regarding this issue,

Reference 2 “Organic Materials for Information Science 1442 Committee A Subcommittee (Liquid Crystal Materials) 7th Study Group B Subcommittee (Intelligent Organic Materials) 62nd Study Group Joint Materials from the Study Group, Japan Society for the Promotion of Science

It is stated in. Therefore, further description is omitted.

It is known that the following method is effective for improving the poke of an image in such a hold type display.

(1) Shorten the hold time of the display light

(2) Arrange the display light at the screen position along the movement of the image as much as possible.

In order to shorten the hold time of (1), as described in Japanese Patent Application Laid-Open No. Heisei 93-25771, a liquid crystal shutter may be placed somewhere on the display device. It is only necessary to set the opening time in synchronization with the vertical synchronization for display. Also, as another means, as described in Reference 2, the flashlight can be synchronized so that the light is synchronized and blinked in a nose-like manner. You may let the rash.

However, in these methods, firstly, the light use efficiency is reduced. Let's do it. Secondly, the 'light-light system' becomes complicated and expensive. Third, there is a difficulty in increasing the speed of the liquid crystal shutter at this time.

As a method of limiting the opening ratio by a driving method, there is a method of intermittent driving as described in the following reference documents 3 and 4.

Reference 3: Equality "On the display of LCD moving images" The Liquid Crystal Society of Japan, 1st LCD Forum Preliminary Report (1998-08)

Reference 4: Nakamura et al. “New Wide Viewing Angle LCD for Video” 1980 1st LCD Forum

Tooth or to a force ^s et al., In this technique, 1 full I Lumpur soil (1 screen that displays the time) is divided into a plurality of sub full I Lumpur de, support Boeuf I over a black screen Insert as a root. For this reason, it is necessary to operate the driving driver at a high speed, which is often difficult in terms of circuitry.

In addition, as the method (2), it is known that a large effect can be obtained by increasing the field frequency, for example, by doubling the field frequency. such was only _c that have been al but al, 1 2 0 to you in full I Lumpur de frequency HZ is that written strain on IC or the like for dynamic driving pixels. In addition, since the number of display screens is doubled, if the increased screen displays a compensation screen created based on the intermediate value between the original screen and the next original screen, etc. However, since a circuit for that purpose, so-called motion compensation, is required, the scale of the signal processing circuit is also increased, and the cost is increased.

In addition, there is a gray scale display method as a countermeasure against the fact that the image looks slow from the response of the screen, but a voltage adjustment method is generally used. This is in response to the gray scale data, Ah Ru was _c or in that to adjust the voltage value you applied technique, Ni would Yo Pula Zumade office flops of the stomach, the discharge state and the two values of the non-discharge state For display devices that can only display data, the time division gray scale display method is used. The time-division gradation display method is a method in which one field is It is divided into fields, and gradation is displayed by the difference in the total amount of time that this subfield is on. Here, when gradation display is performed in 8 bits, the length ratio is 1: 2: 4: 8: 16: 32: 64: 128. To the world! Then, by turning on and off each of them, gradation display is performed as a whole.

At this time, the on / off of each subfield depends on each bit data when the gradation data is displayed in 8-bit digital. Go.

As a display device using a liquid crystal, there is another projection type display. It consists of a light source unit that outputs a substantially parallel light beam, a display element that controls the amount of light beam transmitted according to the image to be displayed, and a lens unit that projects the light beam. It is standing. As a display element, a liquid crystal display element is generally used, but a DLP element that changes the angle of a minute mirror may be used in some cases. At the same time, a similar problem arises with this projection display.

In addition, a similar problem occurs in a liquid crystal plasma display and an EL display, which generally perform a hold-type display.

In the foregoing, the problem of slow display on a hold-type display device has been mainly described. For example, a time-sharing method such as a plasma display is used. In displays using the gradation display method, there is a problem that gradations called pseudo contours are not displayed uniformly in moving image display.

(Background technology from the viewpoint of the problem to be solved by the invention)

For this reason, first, when displaying a moving image, there is no inconvenience due to the integration effect, and the image, screen or surface is bright and simple. Therefore, development of hold-type display devices such as inexpensive liquid crystal display devices and projection-type liquid crystal display devices (displays) has been desired.

Also, basically, even if the countermeasures that have been proposed so far are taken, There was a need for the development of technology that would be simple and inexpensive.

Second, the display of moving images using these conventional moving image-capable technologies has many issues to be solved, but it is not the case when displaying moving images or images. It is very effective and provides a smooth display.On the other hand, when a liquid crystal display device for this purpose is used for displaying still images, for example, 〇 A screen If the image is displayed or a still image is displayed, the display will be easier on the CRT than the conventional liquid crystal display device has, such as eyestrain caused by jitter. That point has been lost.

At the same time, with the progress of OA in recent years, there has been a high demand for the sharing of display devices for various devices such as game machines, computers, word processor televisions, and the like. However, unlike in the United States and Europe, where housing conditions are poor, in Japan, unlike CRTs, there is great expectation for display devices that use liquid crystals, which are thin and easy to form large-sized display surfaces. ing .

As a result, it is possible to display moving images while maintaining the original gentleness of the LCD device without the jitter and the flicker caused by the strong light of the CRT. However, there has been a demand for a hold-type display device, particularly a liquid crystal display device, capable of displaying still images as in the past.

Also, there has been a demand for the development of an inexpensive device that can be used for a television broadcast or the like.

In addition, in the case of a moving image display that doubles the field frequency, especially for high-definition broadcasting, the circuit for performing various processing is required. And so on, which makes the device itself expensive. For this reason, there has been a demand for the development of an inexpensive liquid crystal display device suitable for high-vision and still image display.

Also, there has been a demand for a display device that does not generate false contours even if it is not a hold type. Disclosure of the invention

The present invention has been made with the object of solving the above problems, and is intended to provide a display device, particularly a hold-type display device, and more particularly, a display device using a liquid crystal. In order to eliminate blurring and delay in response to moving images and videos due to the integration effect, we created an intermediate image and created a black screen more easily and easily than before. That's what it is. Similarly, the above-mentioned poke and the characteristics of the image in which the response delay is liable to occur are found, and a solution is then made.

Next, in a (hold-type) display device that displays moving images and still images, when displaying moving images, it is necessary to use driving and lighting compatible with moving images, and to display still images. Switches to driving and lighting for still images.

In addition, it has been devised to determine whether the image data to be displayed is a moving image or a still image, and to display it appropriately based on this. Specifically, it has the following configuration.

In the first aspect of the present invention, a moving image is displayed on a display device using a liquid crystal or the like, in particular, on a display surface using a hold-type display element. Drive means for displaying still images as well as still image drive means, user operation, automatic detection based on communication protocols and built-in programs, etc. A switching means for judging whether the image displayed in the step is a moving image (video) or a still image, and appropriately switching the two means by a predetermined method. ing . As a result, the following operation is performed.

When the image to be displayed is a moving image, the moving image driving means causes the display means to perform a moving image-based (suitable for a moving image) display (still for convenience of a scene). Image may be displayed). The still image driving means similarly displays still images. The switching means switches between the two means according to an image to be displayed by a predetermined method such as based on a data program recorded at the time of manufacturing.

In another invention, the hold type display means uses a liquid crystal regardless of whether it is a transmissive type or a reflective type. When receiving a video signal for display or the like, the video driving unit drives the liquid crystal corresponding to the video, or performs the video driving unit or the illumination corresponding to the video. It has a movie lighting drive unit. Of course, you may have both. As a result, the following operation is performed.

When receiving a video signal such as a normal television broadcast (or when receiving an instruction to display the video signal, etc.), the video LCD drive unit of the video driving means is used to Driving LCD for video. Similarly, the lighting driver for moving images performs lighting corresponding to moving images. According to another aspect of the invention, the moving image liquid crystal driving unit displays an image by increasing a field frequency such as 1/60 second by a predetermined factor, such as twice, as compared with a still image display. It is characterized by being a high field frequency display drive unit. As a result, the following operations are performed.

The moving image LCD drive unit is a high field frequency display drive unit, and therefore displays images with a higher field frequency than that for still image display. For this reason, an intermediate image may be created as needed, and the latter half of a field may be displayed in black or gray to the extent that the afterimage effect is not adversely affected.

In another invention, the moving image liquid crystal drive unit is an intermittent drive display drive unit that displays a screen by intermittent drive. As a result, the moving image LCD drive unit has an even-numbered image in the left half, an odd-numbered image in the right half, and more appropriately. The moving image is displayed by intermittent driving such as swapping the left and right. Of course, it will also emit knock light as needed.

According to another aspect of the present invention, the moving image lighting drive unit has a short-term lighting unit for lighting a display light such as a light-emitting diode and an electric light shorter than a period corresponding to the field frequency. are doing . As a result, the moving image lighting drive unit is shorter than the period corresponding to the field frequency such as 1/60 second, for example, the first 1/90 second equal display light. Lights up. In principle, the display is only for the first 1/120 second or the like, but may be the last 1/9 second or 1/120 second.

In another invention, the moving image lighting drive unit displays the moving image at the time of displaying the moving image.

It has a noise illuminating section that illuminates in a pulsing manner for each screen. As a result, the pulse lighting section of the moving image lighting drive section is composed of a large number of images as long as the image does not adversely affect the afterimage effect when displaying the moving image. Pulse light as a backlight for each screen of each image is turned off, for example, the last 1/120 second of one field frequency is turned off. Lights according to the prescribed procedure.

In another invention, when displaying an image, such as when receiving a video signal, the switching means is an automatic switching means that detects this and automatically switches to the moving image driving means. is there . As a result, the following operation is performed. The switching means is an automatic switching means integrated with a memory, a CPU, a computer, and the like. When a video signal is received, this is detected by a predetermined program. Then, it automatically switches to the moving image driving means. For this reason, appropriate instructions shall be given to each part such as the display means,, 'and the like.

In another invention, the automatic switching means precedes the display of a screen that moves faster than at least a difference from the previous screen (including a partial image of a specific position or property). Detect and perform video-adaptive drive Difference detection type automatic switching hand It is a step. As a result, the following operation is performed.

The automatic switching means is a difference detection type automatic switching means, and switches between commercial broadcasting and scene depending on at least the difference from the previous screen and other cases. In addition, it detects moving images, etc., and performs driving corresponding to moving images so that it can be detected and viewed easily before displaying a fast-moving screen. Therefore, although there are exceptions such as the display of a time signal, the actual display is generally delayed by at least one field. In another invention, when displaying a still image, the still image driving means emits the display light more than during the period corresponding to the field frequency. It has a normal lighting part that keeps on lighting.

Thus, the still image driving means can display the still image (for example, in the case of a moving image whose movement is slower depending on the case) so that it is easy to see when displaying the still image. The display light is turned on during the period corresponding to the ground frequency.

In other inventions, the element such as a liquid crystal display device has a response time of at least one field (in principle) so that it can sufficiently follow the fast movement of the moving image. 1/60 seconds, and 1/120 seconds depending on the case).

More specifically, it has a high-speed response element such as an OCB mode, so that the response time is as short as 10 ms and at least shorter than the period of one field.

In another invention, a judging means for judging whether the image data to be displayed is a moving image or a still image, and, if the judging means judges that the moving image is a moving image, a part of the display surface, particularly the moving Separate the part including the central part from the surrounding part, and display appropriate video-based display such as display of video-based display and display of video-based display in high mode. Since it has a moving image driving means in the center, the following operation is performed.

The judging means judges whether the image data to be displayed is a moving image or a still image. If the judging means judges that the moving image is a moving image, the center moving image driving means separates a portion including the center portion of the display surface from its peripheral portion and performs appropriate moving image display. . Therefore, at the periphery of the display surface, moving images mainly composed of still images and moving images in normal mode instead of in high or low mode are displayed. Indication of the subject is made. Note that even if the video has little movement or motion vector, it is of course possible to have a function to display still images. .

In another invention, a voltage adjustment method and a time-division gray scale display method are used in combination in a general gradation display method of a display device without being limited to the hold type. In particular, if the period of a video signal input to the display device is one field, the one field is divided into a plurality of subfields, and "a plurality of subfields are divided into a plurality of subfields. Use the number of fields-1 "bit time division gray scale display method ₀

In other inventions, the number of subfields is set to 2 (in principle, at regular intervals) in terms of simplicity, cost, and effect. Of course, it may have a function to set the interval to be irregular according to the content of the broadcast such as the CM program.

In another invention, in the gradation display, when the number of subfields is, for example, 2 and the gradation is 50% or less, one field is used. The second half is no longer displayed. This aims to solve the response delay and the integration effect.

In another invention, the subfield of 1 is 0N (normal ON for a normal liquid crystal display, 100% luminance), and OFF (0%) gradation. It is a display, and the other subfields adjust the time of 0 N (100%) according to the gradation to be assigned. In addition, the absolute luminous intensity of the (-, 100%) value of the power of the power supply in the form type, etc. It may be increased or decreased appropriately due to room, room lighting, etc.

In another invention, since it is necessary to display a moving image of 60 frames per second, the response time of each pixel element of the display device is set to 16 ms or less.

In another invention, a 0CB mode liquid crystal is used as a high-speed response means.

In other inventions, optical or mechanical shutters are used as a means of solving the response delay by the integration effect. The last period of one field is not displayed.

In another invention, the update of each displayed image of a moving image and a video is synchronized with the interruption of light by the shutter. Specifically, on the display surface of a liquid crystal display, etc. (at this time, not from the left, right, or bottom), updating is performed in order from the upper pixel row. It synchronizes with the passage of the tar (a certain level is at the opening of the shutter). For this reason, for example, immediately after updating, only the first half of one field passes light from the start of a new pixel.

In another invention, the shutter has an aperture (aperture) in which the transmitted light has half the height of the display surface (even if the light is diffused, parallel, etc.). ).

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

In another invention, a light beam scanning means, specifically, for example, a rotating mirror is used instead of the shutter.

In another invention, a small rotating prismatic mirror, a so-called micromirror device, which electrically moves the angle of a mirror on a semiconductor is used as a rotating mirror. are doing . In other inventions, the shutter is as small as the liquid crystal display (including the projection type film part).

In another invention, a liquid crystal of a mode capable of a high-speed response of 30 ms or less or the like, specifically, a CB mode or the like is used for the display unit. According to another invention, in a hold-type display device, when displaying a moving image or a video in which an image of about 1/30 to 1/60 is updated in order every second, particularly, To improve the dynamic response, an intermediate image is created from the original (raw) image data and inserted between the original images.

For this reason, the original image is a whistle that is displayed for 1/60 second each, but is displayed for 1/120 second, and the original image is displayed between the previous and next raw images. The created intermediate image is displayed for 1/120 seconds. Therefore, the overall display time is unchanged.

In other inventions, the creation of the intermediate image is based on the two raw image data before and after to be inserted, and the two raw images before and after, as well as the two raw images. I'm using overnight. Furthermore, in terms of fast and timely accurate response, an intermediate image may be created by extrapolating the previous two images (without using the latter image).

In another invention, attention has been paid to a moving vector that is easy for human eyes to see when the image is displayed when creating an intermediate image. Specifically, the brightest point and darkest point in the image, the movement of the average bright portion and the moving portion of each portion of the image, and the like. For this reason, image compression techniques (MPEG, etc.) are also used as needed.

In addition, some pixels at predetermined positions and pixels separated from each pixel at a predetermined position are extracted and weighted at a level. The sum is calculated, and the motion vector is calculated based on the difference between the absolute values of the sum of the levels on the previous and subsequent screens. In another invention, each pixel is originally in a predetermined state within one field, for example, for clear display of a moving image on a hold-type display device. The principle is to keep the darkness etc. (or in the past it was like that), but this is displayed at the end of each field I try to lose my state. As a result, the following structure is obtained, and the operation is performed.

According to the standard of the display surface, each pixel is arranged in rows and columns, in rows and columns, and in a plane or multilayer (for example, G, H, cell). The display element exhibits a display function in charge of transmitting and blocking light by applying an electric field. At this point, when the electric field applying means applies an electric field for display, the electric field is conventionally (although in practice there will be a slight decrease, but in practice) one field. Field was held constant within the time interval.

However, in the present invention, the discharging means eliminates this electric field by the small discharge. For this reason, at least in each field, at the end of one field, the electric field is 0, and in some cases, a small value that does not cause the integration effect. It is getting less.

Thus, the response delay of the moving image is improved.

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

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

In other inventions, the liquid crystal layer has a certain degree of conductivity or resistance, so that an electric field applied to the electrodes above and below the liquid crystal layer flows through the liquid crystal layer itself. It disappears within one field interval due to the current flowing.

In another invention, the electric conductivity of the liquid crystal is 10 to 10 Gemens or more. In another invention, an electric field applied to one of the upper and lower electrodes of the liquid crystal layer, or the horizontal electrode, applies an electric field to a substrate or an earth-like line formed on the substrate. It is annihilated by flowing water.

In other inventions, attention is paid to the auxiliary capacity (by devising it) to prevent the response delay of the moving image.

In other inventions, attention is paid to whether the liquid crystal on the display surface is a normally white, normally black, or misaligned.

In another invention, the polarity in applying an electric field is alternately changed every screen or every horizontal pixel column. As a result, the DC component at certain time intervals becomes zero, and charge-up is avoided. Also, the display is softer. Brief explanation of drawings

FIG. 1 is a diagram showing how luminance changes when displaying CRT and LCD.

FIG. 2 is a diagram for explaining the cause of the response delay of the movement in the hold type display.

FIG. 3 shows the configuration of the main part of the first embodiment of the present invention.

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

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

FIG. 6 is a configuration diagram of a main part of the liquid crystal display device according to the above embodiment. FIG. 7 is a configuration diagram of a main part of a liquid crystal display device according to a third embodiment of the present invention.

FIG. 8 shows the contents of images that are displayed intermittently in order in the above embodiment. It is a figure.

FIG. 9 is a configuration diagram of a main part of a liquid crystal display device according to a fourth embodiment of the present invention.

FIG. 10 is a configuration diagram of a main part of a liquid crystal display device according to a fifth embodiment of the present invention.

FIG. 11 is a configuration diagram of a main part of a liquid crystal display device according to a sixth embodiment of the present invention.

FIG. 12 is a diagram conceptually showing a display method according to the seventh embodiment of the present invention.

FIG. 13 is a diagram conceptually showing the inter-grayscale response in the above embodiment.

FIG. 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 diagram conceptually showing the configuration and operation of the shutter of the display device of the above embodiment.

FIG. 16 is a diagram showing a positional relationship between the start of shining of the horizontal scanning line of the display unit and the opening tip of the chopper in the above embodiment.

FIG. 17 is a diagram conceptually showing the light emitting operation of the pixel and the display surface of the above embodiment, in comparison with a CRT method and a normal liquid crystal display element. FIG. 18 is a view conceptually showing a liquid crystal display device according to a ninth embodiment of the present invention.

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

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

FIG. 21 is a diagram showing a sequence of continuous images focused on by the eleventh embodiment of the present invention. FIG. 3 is a diagram conceptually showing the creation of an intermediate image.

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 display according to the 12th embodiment of the present invention, in comparison with a conventional circuit.

FIG. 24 is a diagram conceptually showing brightness and transmittance waveforms and the like of the above embodiment in comparison with those of other systems.

FIG. 25 is a diagram conceptually showing a circuit for display according to 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 is a diagram showing the operation of the sixteenth embodiment of the present invention. FIG. 29 is a diagram showing the configuration of the seventeenth embodiment of the present invention. (Explanation of code)

1 Main unit of liquid crystal display

2 1 Light lamp

2 2 Light lamp

3 Light guide

4 High-speed switch

5 Switching section

1 1 Receiver

1 2 Image distribution section

1 3 Odd image storage

1 4 Even image memory

1 5 1/60 sec delay circuit 1 6 1/1 2 0 second delay circuit 1 7 Averaging circuit

1 8 Display controller

1 9 Display

2 0 Odd-numbered image left truncated part 2 1 Even-numbered image right truncated part

2 2 Intermittent display control section

2 5 Communication protocol storage

2 6 Signal detection judgment section

2 7 Display control switching unit for video

2 8 button, switch

2 9 button, switch

3 0 Judgment unit

3 1 Sampling point sampling unit

3 2 Sampling point data storage

3 3 Comparison section

3 4 Video display control

3 5 Various video display processing units

4 0 Classification part

4 1 Display device

4 2 Peripheral drive

4 3 Central drive

4 4 Video compatible control unit

4 5 switch

4 6 Center display surface

4 7 Peripheral display surface 3 1 1 Lamp

3 1 2 Reflector

3 1 3

3 1 4 LCD device

3 1 5 Projection lens

3 1 6 Screen

3 4 1 LCD shutter

3 6 1 Square pillar mirror

3 6 2 Integrator

4 0 1 Receiver

4 0 2 First input image buffer 4 0 3 Motion comparison section

4 0 4 Judgment unit

4 0 5 Intermediate image creation unit

4 0 6 Display controller

4 0 7 Display

5 1 1 T F T Transistor 5 1 2 Pixel electrode

5 1 3 Gate line

5 1 4 Source line

5 1 5 Discharge means

5 1 6 Counter electrode

5 3 1 Reference potential wiring

5 3 2 Resistance

5 3 3 LCD resistance

5 3 4 Resistance The form of implementation of the invention

Hereinafter, the present invention will be described based on the embodiments.

(First Embodiment)

In the display device of this embodiment, a display device that drives a so-called OCB mode liquid crystal by TFT is used. The response time was 8 ms.

The 0CB mode is described in detail in, for example, Japanese Patent Publication No. 7-84244. Further, the configuration (structure) of a cell using a 0CB mode liquid crystal is described in, for example, Reference 5. A panel using the 0 CB mode liquid crystal of the present embodiment was also prepared in the same manner. Reference 5: Uchida et al., “IDRC, 97” (19997) p 3 7 For this reason, the description of the structure of the 0 CB mode itself is omitted. In addition, a method using a flash lamp as a lighting method for moving images was adopted, and this is described in detail in Reference 6.

Reference 6: Equality "AMLCD, 98" (1998) For this reason, a detailed explanation of the principle of the flash lamp and the driving method is also provided. Omit it.

The CB mode liquid crystal display device that uses a TFT (thin film transistor) to drive the pixels has a normal video signal as shown in Fig. 3. Use the flash lamp method for screen display that supports fast-moving moving images such as games, etc., and use the OA screen (internet screen, OA software screen or When a still image such as a landscape is displayed even with a video signal), that is, in the case of a display corresponding to a still image, normal lighting is used, and in this drawing, the lighting is used. Is the main unit of the OCB mode liquid crystal display It is. 21 and 22 are knock light lamps. 3 is a light guide. 4 is a high-speed switch. 5 is a switching section.

In addition, in addition to the above, the display surface is a game machine, the display of a movie recorded on a VTR, a part of other equipment such as an OA equipment such as a single processor (display part). Although there are switching means for use as such and a keyboard or the like, these are not shown because they have no direct relation to the purpose of the present invention. .

And, in the case of a still image compatible display, only the left lamp 21 is lit. On the other hand, in the case of a video-compatible display, the left and right lamp sections 21 and 22 are lit, but with the high-speed switch, each video screen is synchronized with vertical synchronization. On and off at high speed.

Then, when the observer himself switched the display method according to the displayed content, he obtained a display with few pokes at the time of a moving image and with less eyestrain at the time of a still image. Was.

In this case, the light amount of the flash lamp is not shown so that the brightness of the display surface does not differ between video and still images. It is, of course, acceptable to do so.

(Second embodiment)

In the present embodiment, an intermediate image is created and inserted.

In the present embodiment, the field frequency is doubled (120 Hz) instead of the flash lamp, and the display corresponding to the moving image is displayed. As in the embodiment, a display without poke was obtained.

This is shown in Figure 4. The left side (1) of the figure shows the contents of the image data transmitted in order. (2) is the content of the intermediate image created in order based on the transmitted image data. As shown in (1), the black squares 6 1 to 6 3 on the display surface 19 1 are lower right than upper left on the screen. Go to. For this reason, as shown in (2), intermediate images 61 2 and 62 3 showing the movement of a black square in the middle are created. Then, the images are displayed in the order shown by the thick arrows in the figure.

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

In this figure, the interval between the vertical white circles “〇 j” is 1/60 seconds, and the interval between the decimal point “.” And 〇 is 1/120 seconds. By the way, the data of the screens of numbers 1, 2, ... shown in the horizontal direction at the top of the figure are transmitted at 1/60 second intervals. Then, except for the first screen, etc., in the steady state, the data of each screen is first branched into two. Then, the branched one is delayed by 1/40 seconds (1/60 seconds + 1/90 seconds) of the screen that has already arrived 1/60 seconds ago. An intermediate image is created by taking the average value of the data and the average. Then, the created intermediate image is used for display at 1/120 second after the arrival of the image (1/40 second after the arrival of the next image). . The other branch is stored for 1/60 of a second and then branched into two more. The branched 1 is used for display as it is with a delay of 1/60 second after arrival.

Next, the data branched again is stored for another 1/120 second, and then the average value of the data of the next screen arriving 1/60 second later and 1/60 second after arrival It is used for display 40 seconds later (1/120 seconds after the next image arrives). (Note that in this case, the averaging process actually requires some time and there are some time lags between the two adjacent screens, but these are not appropriate. Of course, they are compensated.)

Fig. 6 shows the configuration of the main part of this device. In this figure, 11 is an image receiving unit. Reference numeral 2 denotes an image distribution unit. 13 is an odd-numbered image storage unit. 14 is an even-numbered image storage unit. 1 5 is FIFO This is a 1/60 second delay circuit with 16 is a 1/120 second delay circuit similarly. Reference numeral 17 denotes an averaging circuit, which has a delay circuit and memory (not shown). 19 is a display unit.

The display control unit switches the display cycle of the display unit from 1/60 second to 1/120 second when displaying a moving image, and for that purpose, Select the image to be displayed. In other words, 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 video is generated, but the number of intermediate video is not limited to this. 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 for displaying images accordingly.

In this case, the image is created.If 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 created. The image is (2A + B) / 3, and the next intermediate image is (A + 2B) / 3. Similarly, when the number of images is 3, the displayed intermediate images are (3A + B) / 4, (A + B) / 4, and (A + 3B) / 4 in that order. In addition, it may be created from two images before and after. In addition, it is also acceptable to provide for a change of a scene and a channel of a user. However, they are not difficult to understand, both technically and technically, and will not be described further.

As a result, high-speed display was achieved without sacrificing brightness.

(Third embodiment)

In the present embodiment, intermittent driving is performed as a driving method corresponding to a moving image. In other words, half the black screen is put in one field, but this also gave results with less blur. Even in this case, if the brightness of the lighting (no, 'right') is left as it is, the brightness will be halved compared to a still image. Of course, the luminous intensity of this was doubled.

FIG. 7 shows a configuration of a main part of the present embodiment.

In this figure, 11 is an odd-numbered image left-side truncated portion. Reference numeral 12 denotes a right-side truncated portion of the even-numbered image. 22 is an intermittent display control unit.

Based on the above, the intermittent display control unit alternately sends the black image on the left or right half to the display unit at a period of 1/60 second, and also displays the By controlling the luminous intensity twice, a video-compatible display is achieved.

This is shown in Figure 8. In this figure, the images shown in (1) to (4) are displayed in order from top to bottom. At this time, the left half 1911 of the odd-numbered image and the right half 1912 of the even-numbered image are deleted and displayed.

(Comparative Example 1)

Although the same hardware (liquid crystal display device) as in the previous three embodiments was used, blurring was noticeable when performing display driving for still images in the case of moving images. Conversely, in the case of a still image, when the display drive for a moving image is performed, jitter and the like become conspicuous, and eyes are tired after a long use.

(Fourth embodiment)

The present embodiment relates to a liquid crystal display device that displays a moving image and a still image separately. In the liquid crystal display device of the present embodiment, a video signal is provided with a video detecting means so that a video signal is automatically displayed corresponding to a moving image. As a result, in the case of a video signal, driving is performed for moving images as in the first embodiment, and in the case of a still image, driving is performed for still images. . Note that the specific content of the detection of whether or not a video is a moving image is described below. In the case of NTSC-based color television broadcasting, a clock signal, a luminance signal, This is done by detecting the presence or absence of the carrier color signal. The configuration of the main part of the device in this case is shown in Fig. 9 (a).

In this figure, reference numeral 25 denotes a communication protocol storage unit. 26 is a signal detection determination unit. Reference numeral 27 denotes a moving image corresponding display control switching unit. The signal detection determination unit determines whether or not the image signal transmitted from the image receiving unit to the display unit is a moving image based on various communication protocols, and switches the display corresponding to the moving image if the image signal is determined to be a moving image. Switch the necessary display to the section.

Specifically, as described above, the switching is performed by doubling the display cycle, intermittently displaying the image, and simultaneously reducing the light intensity of the light source by two times. And so on.

However, whether or not a video is a moving image is not determined from the signal of the image, but is detected by a switch or button operation by the user of the device. Of course, you can do it. The configuration in this case is shown in (b). Specifically, if the channel of the television receiver is selected, the determination unit 30 determines that the video is a moving image, and the keyboard is operated. If not, it is determined to be a still image.

Also in the present embodiment, although there are some differences depending on the screens, almost the same results as those of the previous three embodiments were obtained.

(Fifth embodiment)

The present embodiment relates to a liquid crystal display device that determines whether or not a video is a moving image by focusing on the difference between the signal of the previous screen and the currently received signal, particularly, the difference of the signal level described above. .

For this purpose, a memory and a difference circuit are used. The other points are the same as those in the fourth embodiment. FIG. 10 shows the configuration of the main part of the present embodiment.

In this figure, 30 is a judgment unit. 31 is a sampling point sampling unit. Reference numeral 32 denotes a sample point data storage unit. 33 is a comparison section. Reference numeral 34 denotes a moving image corresponding display control unit. Reference numeral 35 denotes various moving image display processing units.

The sample point sampling unit samples pixel data determined in advance from the data 每 of each screen received by the image receiving unit and notifies the comparing unit.

The comparison unit compares the data of the sample point one screen before stored in the sample point data storage unit with the data notified from the sample point sampling unit, and performs a predetermined operation. Then, the difference is obtained, the difference is sent to the judgment unit, and the notified data is sent to the sample point data storage unit composed of the FIFO, and the storage contents are updated. Let it go.

The determination unit determines whether the image is a moving image or a still image based on the transmitted difference, and notifies the determination result to the moving image corresponding display control unit.

When the moving image display control unit is notified that the image is a moving image, the moving image display control unit causes the various moving image display processing units and the display unit to display the image corresponding to the moving image.

Therefore, in the liquid crystal display device of the present embodiment, even if a still image is displayed even if a video recorded on a tape or a video being broadcast is displayed. , The corresponding display is automatically performed. This makes it even easier to see.

(Sixth embodiment)

In the present embodiment, even if a moving image is displayed, only the center of the display surface moves in the displayed figure, and the moving image is displayed only in the center. It is a thing.

In other words, even in the case of a moving image, it is almost always the case that only the center of the display surface actually moves on the display surface, rather than in many cases. .

Specifically, for example, if it is a news program, it is different if it is a unit such as seconds or minutes, but if you take each screen updated 60 times per second, you will get a figure In fact, it is only the face of the announcer that is moving that is moving, and if it is a live broadcast of baseball, it is virtually a pitcher butter. Only the hero, if it is a dramas, is only the hero and its vicinity, and the indoor room and the baseball stadium in the background are almost still. However, most of the time, the only thing that is moving is in the center of the displayed screen.

Furthermore, especially in the case of a large-screen display, the viewer rarely sees the edge and the periphery of the display surface. Specifically, for example, in the case of the actual situation of baseball, only the pitcher and the pole in the center of the screen are seen, and the spherical wall in the background and the lawn in the lower part are not seen.

In addition, most of the displayed images are located near the center of the display surface. In some cases, the sheriff and the villain glaring in the Western play are displayed on the left and right edges of the screen, but in such a case, the sense of urgency is mainly displayed. The quality of the video does not make much sense. Therefore, only the center part of the screen is displayed for moving images.

The display device of the present embodiment has been noted above, and its configuration is shown in FIG. 11A.

In this figure, reference numeral 40 denotes a dividing part. Reference numeral 41 denotes a display device, 42 denotes a peripheral drive unit therein, 43 denotes a central drive unit, and 44 denotes a central drive unit for displaying moving images. It is a moving image corresponding control unit that performs such control. 4 5 is a switch.

The dividing unit divides the image data from the image receiving unit into a peripheral one and a central one, and sends them to the peripheral driving unit and the central driving unit, respectively. If the determination unit determines that the image is a moving image, the image data from the classification unit to the central drive unit is determined. Switch the switch to send the video to the video control unit. The moving image corresponding control unit displays the transmitted image data in the center of the display surface in correspondence with the moving image. For this reason, necessary processing such as lighting of the dedicated backlight only for this section is also performed.

(B) of FIG. 11 shows a schematic configuration of the display surface of this device viewed from the back side.

Reference numeral 46 denotes a display element section in the center, which is on the viewer side. 47 is a peripheral display element section on the back.

In the present embodiment, the display is easy without jitters and the like without deteriorating the quality of the moving image, and all prices are compatible with the moving image. It will be easier.

Also, in the display device of the present embodiment, as a result of an observation experiment using various image data, a very good screen was obtained in the same manner as in the first embodiment. Was.

In the case of this embodiment, it is necessary to coordinate not only with the device manufacturer, but also with a broadcasting station, etc., but it is necessary to comply with communication protocols, compression such as MPEG, and other communication standards. By sending coarse data at the periphery of each screen, it is possible to increase the number of channels, reduce the size of the recording device, and even use it for other types of display devices such as CRTs. Great effect on cost reduction, etc. (Seventh Embodiment)

In the present embodiment, gradation display is performed without inserting a black screen in order to make it easy to view a moving image.

Now, despite the use of the very fast-acting liquid crystal described above, the only thing that doesn't seem so fast is that the display is held for one field. It occurs.

Therefore, if the display holding time is shortened, a high-speed response can be obtained. That As a means, providing a time during which no video is displayed within one field time and inserting a black screen during that time can certainly be speeded up, but the brightness is reduced You

However, the inventor of the present application discovered that the phenomenon that response was slow and an afterimage was seen was remarkable in a halftone image. That is, when a bright image moves, the afterimage is inconspicuous.

To explain in more detail, there is a noticeable delay in response in the case of a halftone response, particularly when an image with a luminance of less than half moves. The most noticeable afterimage is the black and dark gray pattern that moves. This was also confirmed in the CRT-displayed TV image, and the afterimage was easily seen in a dark scene.

Therefore, in the present embodiment, the voltage adjustment method and the time division gray scale display method are used in combination with the gray scale display method.

For this reason, the liquid crystal display device of this embodiment is particularly effective when used in a display portion of a television receiver or the like where smooth movement is important. However, in recent years, office automation (OA) terminals such as computers have become more and more heavily used for AV applications, and as a result, there is no significant effect on these. O

The display device used an active matrix substrate using TFT, and the liquid crystal used was a high-speed response OCB mode liquid crystal of 3 ms.

The display method is as follows. One frame (display interval) is divided into the first and second subframes (images displayed at the first display interval) and the second subframe (second half). (The image displayed at the display interval of) is divided into the images, and the driving method that uses both the voltage adjustment method and the 1-bit time-division gradation display method is used. Was. FIG. 12 schematically shows a display method of the display device according to the present embodiment. It is shown carefully.

In the figure, (a;), (b), (c), (d), and (e) have gradation levels of 0%, 30%, 50%, 70%, and 10%, respectively. The drive waveform at 0% is shown. When the gradation level is 50% or more, the second subframe in the latter half is fixed and applied at the maximum voltage. If the gradation level is 50% or less, the applied voltage of the second subframe in the latter half will be the minimum.

In this method, the first subframe applies a variable voltage value using a voltage adjustment method. At this time, the applied voltage of the first subframe is adjusted so that when the gradation level is 50% or less, it becomes the maximum voltage at 50%. 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 value is reached at 50%. In the present embodiment, since the minimum voltage is a voltage at which the brightness becomes the lowest, a slight bias voltage is applied, and interpolation is performed during that time.

In other words, the second subframe corresponds to the maximum bit when the gradation data is digitally described, and the remaining sub-frames are analog-output. Is the first subframe. At this time, it indicates that 1-bit time-division gradation display is to be performed.

In this case, if the gradation level is 50% or less, one subframe is inserted for the idle period in which no voltage is applied. In particular, the response becomes a problem when the luminance is low, and this is extremely effective.

In this case, one frame was divided into two and writing was performed. Therefore, the writing frequency of the liquid crystal panel was doubled and scanning was performed at high speed. Therefore, a liquid crystal device that responds relatively quickly is required. The response speed of this element had to be less than 16 ms (= 1 second ÷ 60) because it was necessary to complete the response within one frame. This response between all gray levels Desirably less than the response speed.

FIG. 13 shows the applied waveform in the response between gray levels. (A), (b), and (c) in the figure show the inter-grayscale responses of 30% to 0%, 30% to 100%, and 60% to 0%, respectively. In this embodiment, since the 1-bit time-division gradation display method is also used, the display blinks at every subframe when the display is 50% or less. This is the same as introducing a pseudo black screen. When the value changes to 0%, and when the value changes to 100%, a black screen is inserted just before the change, and the response is speeded up. .

In the case of 50% or more, a complete black screen is not inserted, but the effect of making the response appear fast because of the change in luminance is produced. Displaying 100% luminance is the same as the conventional voltage adjustment method.

In the method of the present embodiment, indeed, compared with the method of inserting a black screen theoretically, the drawback that the effect of improving the response speed is reduced at gradations of 50% or more is lower. is there . However, as can be seen from the above description, this gradation region does not pose any problem even if the response is slow. On the other hand, the liquid crystal display device of the present embodiment has a great advantage that the brightness is not reduced at all.

Although drive waveforms are shown in FIGS. 12 and 13, the liquid crystal display element used in the present embodiment uses a 0 CB mode liquid crystal, so that a sufficient response can be obtained. The speed was fast, and the change in the amount of transmitted light was almost the same as the drive waveform. In the display device using the OCB mode liquid crystal according to the present embodiment, a normally black display which provides a black display when the voltage is low is used. The opposite is also true. If a high-speed response can be obtained, it is needless to say that the liquid crystal itself and the OCB mode are not limited. In other words, for example, even for a TN type liquid crystal element with a response speed of about 80 ms, which is commonly used, if the drive voltage is increased to achieve high-speed response, The effects of the embodiment can be obtained.

However, at present, the liquid crystal display device of the present embodiment can sufficiently exhibit its effects and performances by using 0 CB type liquid crystal display device, ferroelectric liquid crystal display device, and antiferroelectric liquid crystal. It is a display element, and it is needless to say that these are preferable. In addition to the liquid crystal, it is also good for a DMD type display element or the like. Note that the liquid crystal display device may be of a direct-view type or a projection type.

Although the present embodiment is divided into two subframes, it is needless to say that more subframes may be used. . In that case, higher-speed writing is required, but the effect of high-speed writing is high. In this case, if the length of the subframe is changed, gradation display can be satisfactorily realized.

Specifically, for example, when dividing into three sub-frames, the first, second, and third sub-frames are divided into one sub-frame and one sub-frame having a length of 1: 2: 4. Divide it into pieces.

If the displayed data exceeds 50%, the third subframe is set to ON. The second subfield shall be set ON if the value obtained by subtracting the amount displayed in the third subframe from the displayed data exceeds 25%. The first subframe displays the value obtained by subtracting the amount displayed in the second and third subframes from the display data using the voltage adjustment method. That is, the first sub-frame is performed by the voltage adjustment method, and the remaining sub-frames are divided into sub-frames of 1 j-bit time division. A gradation display method is used.

This relationship is the same as the number of subframes increases.

In the present embodiment, the subframe for performing the voltage adjustment method is the first subframe. Although it was a frame, it is a matter of course that the present invention is not limited to this. No matter where you place the subframe to which the voltage regulation method is applied, it is possible to insert a pause.

(Eighth embodiment)

The present embodiment relates to a projection type display using a chopper.

FIG. 14 is a diagram conceptually showing the configuration of the display device of the present embodiment. In this figure, 311 is a light source. 3 1 2 is a reflecting mirror. 3 1 3 is the chino. Numeral 314 is a liquid crystal display element (or a liquid crystal panel of a display device). 3 15 is a projection lens. 3 16 is a screen. Also, the arrows and the thick arrow-shaped boxes indicate each ray, the luminous flux and their direction.

As can be seen from the figure, the light source light 311 provided with the reflecting mirror 12 becomes an almost parallel light flux, and is incident on the liquid crystal panel 314. An image is formed on the LCD panel 314, which is enlarged by the projection lens 315 and projected on the screen 316. In this case, as described above, the chiton 311 is inserted between the light source 311 and the liquid crystal panel 314.

Now, as shown in Fig. 15, this chino is a large enough disk with a rectangular hole 3 1 3 1, and this disk rotates at high speed. As a result, the light source light 311 is intermittently incident on the liquid crystal panel 314 through the opening 311. The vertical length of the rectangular hole 3 131 is smaller than the vertical length of the liquid crystal panel 3 14, and the light emitted from the light source at a certain moment is It will illuminate a part of the cell. In the present embodiment, as shown in FIGS. 15 and 16, the vertical size (H) of this hole is half that of the liquid crystal panel (2H). And. In addition, the opening of this chipper 3 13 3 is the same as that of the liquid crystal scanning direction. Rotated to move.

In addition, as shown in Fig. 16, the rotation speed of this capacitor is adjusted so that the scanning speed of the liquid crystal panel and the traveling speed of the holes are not only the same. The phase was adjusted so that the hole illuminated the area where the new data was written by the scan and the hole was written at the same time. As a result, when new data is written to the LCD panel, an image is projected at the same time that the image at that point is projected. Project for only the time (1/120 seconds). After that, light is not transmitted because it is shielded by the chopper's shield. In FIG. 16, the liquid crystal element at the horizontal line indicated by 600 shines for the image display, and at the same time, the tip of the opening 3 13 1 of the chino 3 13 Position. After a lapse of 1/120 seconds, the rear end of the opening comes to this horizontal line.

Therefore, as shown in (c) of FIG. 17, the display is stopped for a certain period of time, so that it is close to CRT in terms of image. This figure shows the relationship between the brightness (Candela Lux, etc.) and time in the case of CRT (a) and the case of normal liquid crystal (b) for comparison. is there .

By using this display device, it was possible to perform good high-speed display without blurring the image even on a screen where the image is switched at high speed.

In the present embodiment, a 0 CB type liquid crystal element having a response speed of about 20 ms is used as the liquid crystal display element. According to experiments, when the response speed of the liquid crystal element itself was slow, the effect was small, and the effect appeared only in the liquid crystal element whose response speed was 30 ms or less. Here, the response speed is the response time from dark to light when a voltage at which the transmitted light amount becomes 10% and a voltage at which the transmitted light amount becomes 90% are applied alternately. It is the sum of the response times from light to dark. The response time is the time required for the change in transmitted light amount to change from 10% to 90%. Although a liquid crystal display element is used in the present embodiment, this is similarly effective for a DLP element. In other words, basically, the same effect can be obtained if the device holds the display state for one field period.

In addition, although a chopper for shielding light from the light source was used, other mechanical shutters may be used. In other words, basically, any structure may be used as long as the opening moves in the direction of liquid crystal scanning.

Using a mechanical shutter, such as a chopper, has the advantage of being the simplest structure. In this embodiment, the light-shielding portion of this chopper is made of an object that absorbs light, but it may be a reflector because it only needs to be able to shield light. Furthermore, when light is reflected to the light source side by using a reflector, the light flux can be reused, and the brightness can be improved.

(Comparative example)

A flash lamp was used in place of the light source and the chiono in this embodiment. In this case, it flashes in the same manner as in the present embodiment, but the flashing is not synchronized with the liquid crystal display. In this case as well, the effect of speeding up was found, but the effect of this embodiment was not seen. This is because there is an area displaying old display data at the moment when it is turned on.

In this embodiment, in synchronization with the display start of the horizontal scanning line of the liquid crystal display device and the display start direction, only one half cycle (one cycle = 1/60 second) passes through the opening. Light is emitted. As a result, good responsiveness not seen in movie display (the entire screen is displayed at the same time) was obtained (the ninth embodiment).

In this embodiment, a liquid crystal shutter is used instead of the chopper according to the above embodiment.

FIG. 18 conceptually shows the configuration of the projection type liquid crystal display device of the present embodiment. In this figure, reference numeral 341 denotes a liquid crystal shutter. Others In the configuration, the same reference numerals are given to the same components as those in the above embodiment.

As shown in this figure, the projection display has a liquid crystal shutter 341 inserted 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 arranged side by side, and as shown in Fig. 19, this is aligned with the scan direction of the liquid crystal panel. I let you do it.

Now, this liquid crystal shutter needs to be switched at high speed. For this reason, in the present embodiment, a ferroelectric liquid crystal element capable of high-speed response and a ΔCB type liquid crystal element are used.

Good characteristics were obtained in any case. The response speed of the ferroelectric liquid crystal device was 20 as, and the response speed of the 0CB type liquid crystal device was 10 ms. Of course, if the drive voltage is increased, it is possible to further increase the speed.

Also, it is desirable that the liquid crystal shutter has a high transmittance. In this case, the above-mentioned ferroelectric liquid crystal element and 0CB type liquid crystal element have a low transmittance because a polarizing plate is used. On the other hand, a scattering type liquid crystal such as an ordinary polymer-dispersed type liquid crystal element has a low light loss due to a high transmittance, but has a difficulty in high-speed response. For this reason, in the present embodiment, a response speed of 10 ms was obtained by using a high driving voltage of 30 V.

As described above, the projection type display device has been described as an example in the present embodiment, but it is needless to say that the present invention is not limited to this. That is, the effects of the present invention can be obtained by arranging a liquid crystal shutter on the back surface of the direct-view type liquid crystal display element.

In the present embodiment, since the liquid crystal shutter is used as compared with the previous embodiment, the shutter means is almost the same as the liquid crystal display element. The size is the same, and as a result, the overall size is reduced, and therefore, it can be easily applied to a direct-view display device.

(Embodiment 10)

This embodiment relates to the projection type display as in the previous two embodiments, but uses a prismatic mirror for the shutter means. It scans light.

FIG. 20 conceptually shows the configuration of the projection display of the present embodiment. In this figure, 361 is a prismatic mirror. 36 2 is an integrator. In addition, other configurations are the same as those in the previous two embodiments, and thus are denoted by the same reference numerals.

As shown in this figure, the light emitted from the lamp 311 is converted into a rectangular light beam via the integration circuit 362, which rotates at high speed. Irradiation is performed on prism 361. Then, the reflected light is applied to the liquid crystal panel 316. At this time, the luminous flux changes its reflection direction with the high-speed rotation of the prismatic mirror 361. Then, by making the scanning direction of the light reflected from the prism mirror 361 and the scanning direction of the liquid crystal panel 314 the same, the two Good high-speed display can be performed in the same manner as described in the embodiment.

When a prismatic mirror is used, there is no loss of brightness in principle, unlike the chopper method or the liquid crystal shutter. For this reason, it is preferable in terms of light use efficiency.

In addition to the above, micro mirrors that display by moving the angle of minute mirrors formed on a semiconductor crystal electrically, and 'Is (texis sense) It is also possible for the tool to produce and announce it.

(Eleventh Embodiment)

In this embodiment, a continuous video screen is analyzed to detect its movement, An intermediate image is formed by vector operation.

Figure 21 shows the movement of the video vector that is the subject of this embodiment. In the present embodiment, as shown on the left side of FIG. 21, a continuous image having a moving sequence of a screen (1), a screen (2), a screen (3). It is. In this case, it is classified into a case where the movement between images is small and a case where the movement is large. Only when the movement is large, the intermediate image is synthesized and displayed, focusing on the movement vector.

In the case of the input images shown on the left side of (1), (2), and (3) in Fig. 21, the three images (1), (2), and (3) that have been input move relative to each other. As shown on the right of this figure, the movements are intermediate (1.5), (2.

5) was introduced.

As a result, good display characteristics were obtained.

FIG. 22 shows the configuration of the liquid crystal display device of the present embodiment. In this figure, reference numeral 401 denotes a receiving unit. Reference numeral 402 denotes a first input image memory, which is composed of a single screen FIFO. Reference numeral 4003 denotes a motion comparing unit that detects and compares the motion between the frames that follow each other. Numeral 404 denotes a judgment unit for judging the necessity of creating an intermediate image by comparing the comparison result of the comparison unit with a threshold value separately held. Reference numeral 4005 denotes an intermediate image creation unit that creates an intermediate image when the determination unit determines that an intermediate image needs to be created. Reference numeral 406 denotes a display control unit. When the intermediate image creation unit creates an intermediate image, the display time of the image that has been resinized by the reception unit is set to a half field, and It is a display control unit that displays the intermediate image for the remaining half field. Reference numeral 407 denotes a display unit using a liquid crystal. Next, the processing contents and operation of the motion comparing section will be described in some detail. The motion comparison unit of the present embodiment calculates the sum (absolute value) of the difference for each pixel of successive screens and compares this with a threshold value that is separately stored. Is detected. In addition to the above, focusing on the brightest pixel for each pixel, which is most noticeable to a normal viewer, and taking the difference in the change in that position. There are various means, such as recognizing the pixel in the center of the screen. However, some of these are technologies that are also employed in MPEG, for example, as shown in Fig. 21. Therefore, further description is omitted.

Note that the present embodiment is also an application of the second embodiment shown in FIGS. 4 to 6 in some aspects. Therefore, further description of the present embodiment will be omitted.

(First and Second Embodiments)

The present embodiment relates to a mechanism and a circuit for displaying a black screen. FIG. 23 shows the circuit of the present embodiment in comparison with a conventional circuit. (A) of this figure is a circuit of the present embodiment, and (b) is a circuit of the prior art. In this figure, 511 is TFT. Reference numeral 512 denotes a pixel electrode. 5 1 3 is the gate line. 5 14 is a source line. 5 15 is a discharging means. Numeral 516 is a counter electrode. 5 17 is a reference potential (line, earth).

In a conventional display element using an active matrix, as shown in (b) of the figure, the pixel electrode 5 1 2 is connected via the TFT 5 1 1. Is connected.

When charging the pixel electrode, the TFT 511 is turned on by applying a high potential to the gate line 513, and the source line 511 and the pixel electrode are turned on. Make 5 1 2 conductive. At this time, 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 have high resistance, the pixel electrode is open. At this time, the counter electrode 516 is the reference potential (earth). Connected to 7.

Electric charge is accumulated between the counter electrode and the pixel electrode, and the electric charge is retained until the next charge is performed because the resistance between the counter electrode and the pixel electrode is high. For this reason, a constant voltage is applied between the pixel electrode and the counter electrode, and the transmittance is constant. The transmittance at this time was as shown in (b) of Fig. 24. FIG. 24 (a) is a diagram conceptually showing a case where the same display is performed by CRT for comparison. This figure shows the case where the printing pattern is gradually increased in brightness.

(C) of FIG. 24 is a diagram showing a circuit of the display element of the present embodiment. The present embodiment is characterized in that a resistor 515 as discharging means is inserted between the pixel electrode 512 and the reference potential 517. Due to this resistance, the charge accumulated between the pixel electrode and the counter electrode is slowly discharged, and the charge is discharged before the next write occurs. I'm doing it. The discharge time at this time follows the CR time constant. As a result, the transmittance as shown in (c) of FIG. 20 was obtained. As a result, high-speed 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. FIG. 25 shows the configuration of the present embodiment. As shown in this figure, in this array configuration, a reference potential wire 531 having the same potential as the counter electrode is drawn in parallel with the gate line 513. A resistor 532 was inserted between the wiring 531 and the pixel electrode 512. This resistor uses an amorphous silicon layer doped with an appropriate amount of impurities. At this time, I used the "normally black mode" where the display is dark and no voltage is applied. As a result, good display characteristics were obtained as in the previous embodiment. (The 14th embodiment)

The purpose of this embodiment is the same as that of the previous two embodiments, but the charge of the pixel electrode is discharged by lowering the resistance of the liquid crystal layer. It is unique in that

In order to lower the resistance of the liquid crystal layer, an ionic substance may be added to the liquid crystal. At this time, it was effective if the retention of the liquid crystal was 50% or less. In this case, the effect was obtained by reducing the auxiliary capacitance normally formed in the liquid crystal element and making it equal to or smaller than the pixel capacitance. The effect was obtained when the conductivity of the liquid crystal layer was 10 to 10 Ω cm or more, and more preferably 10 to 8 Q cm or more.

In this case, the display was in the “No-Mary Black Mode” where the display was dark and no voltage was applied.

FIG. 25 shows a conceptual circuit configuration of the present embodiment. In this figure, 533 is the resistance of the liquid crystal layer itself. However, lowering the resistance value of the liquid crystal layer itself is not such a difficult technique, and further description of the present embodiment will be omitted.

(Fifteenth Embodiment)

This embodiment is almost the same as the previous two embodiments, but relates to the “normally one white mode”.

In other words, the previous two embodiments were “normally black mode”, but the present embodiment is not limited to this. Of course. In other words, it is also possible in the "normally white mode" in which the display is "bright" when no voltage is applied.

In the normally white mode, a relatively high voltage must be applied to display black. As a result, the pixel electrode After powering up, the circuit must converge to a higher voltage.

Therefore, in the present embodiment, as shown in FIG. 27, a power supply line 542 for supplying a black voltage is formed, and this is connected to the pixel electrode 521 via a resistor. Connected. In this figure, 542 is a power supply line for supplying a black voltage. 5 4 1 is a power supply line. Reference numeral 543 denotes a TFT for maintaining the potential. A high voltage is applied to the power supply line 542, and the power supply line 542 is held by a TFT transistor.

Further, VH and VL are alternately applied to the power supply line 541, and this voltage corresponds to the black display voltage when applied to the source line. Then, an electrode wire 542 for holding this is formed, and this potential is held by the TFT transistor 543. Since the pixel electrode is connected to this power supply line 541 via a resistor, it achieves the characteristic of saturating toward black voltage, and achieves normally-white mode. It also realized high-speed riding.

In general, the electric field supplied to a pixel electrode, that is, the electric field supplied to a signal line, is often switched in polarity for each screen of an image or for each field. . In this case, the sign of the black display voltage is switched, for example, to +6 V and 16 V. In this case, a waveform in which the power supply voltage value is switched every field was applied to the power supply line 542. For example, in the above-mentioned example, an alternating electric field of +6 v and 16 v was applied.

The present embodiment is not limited to one-field inversion drive, as a matter of course. That is, a method in which electric field inversion is performed at high speed, such as H inversion driving in which the polarity is switched every 1 (one horizontal line), may be used. What is required here is to apply a voltage corresponding to the black display of the source signal to the power supply line 542.

Further, the present invention is not limited to a liquid crystal display element in a narrow sense, and may be an EL display element. Furthermore, any liquid crystal mode is acceptable, and a TN liquid crystal, an IPS liquid crystal, a 0CB liquid crystal, and a VA liquid crystal may be used.

In addition, the faster the response of the liquid crystal mode, the higher the effect of speeding up. For this reason, the TN mode, the IPS mode, and the OCB mode, in which the mode is basically high speed, in which a high voltage is applied, are suitable. In addition, the EL element was basically fast, and the effect of the present invention was high.

If the element is high-speed, it can respond to the electric field that is discharged, and can achieve high-speed operation. When the black-and-white response was applied, the response speed of the element was effective when the response time, which is the sum of the rise time and the fall time of the response time, was 16 ms or less.

(Sixteenth Embodiment)

The present embodiment is similar to the seventh embodiment, except that the application time of the voltage pulse applied within one field time depends on the gradation of the image. The point of adjustment is different.

FIG. 28 shows the operation of the hold-type display element of the present embodiment. (A) of this figure is the pixel gradation at the first, second, third, and fourth field times. (B) shows the relationship between the applied voltage and time within the first, second, third, and fourth field times with respect to (a). . In this figure, for example, in the second field time, the gradation is almost 1/3 as shown in (a), and therefore, as shown in (b). Within the two-field time interval, 100% of the voltage is applied only in the first one-third of the time interval (T).

As a result, a good moving image display was obtained. However, the circuit configuration to achieve this effect is simple because the display interval can be changed instead of voltage adjustment according to the gradation. Therefore, illustration of the bother is omitted. (Embodiment 17)

This embodiment relates to a product in which some of the above embodiments are combined.

Figure 29 illustrates this. As shown in this figure, this display device is not only capable of displaying moving images and still images, but is also appropriate for the content of the program. For this reason, image compression such as MPEG is also used, and in addition, it is possible to appropriately display a vision and the like.

As described above, the present invention has been described based on some embodiments, but it is needless to say that the present invention is not limited to these embodiments. That is, for example, the following may be performed.

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

2) The liquid crystal is other than OCB mode.

3) In the sixth embodiment, the number of divisions of the display surface is further increased. Alternatively, only the center part is in OCB mode.

4) The displayed moving images are recorded on tape or disk.

5) The intermittent drive is performed by doubling the field frequency. Therefore, in this case, the left half of the odd-numbered screen, the right half, the left half of the even-numbered screen, and the right half are displayed in this order.

6) The pixel position to be sampled for judging whether it is a moving image or not is also selected according to the contents of the broadcast program (position). .

7) As a motion vector, if there are a lot of brightest points, functions such as paying attention to the maximum number of pixels are added.

8) Polarity reversal is performed for each unit block. 9) Whether a moving image or a still image is determined is based on the presence or absence of a change in the gradation of the pixel at a predetermined number of positions.

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

1 1) The function of detecting motion vectors is provided with the function of changing the target by broadcasting live news programs and sports. Whether a news program is available or not is determined by storing a separate program guide in advance and comparing it with the built-in calendar or timer. Is done.

1 2) The light source used as a light source is an LED, a semiconductor laser, an electronic light emitting device, etc., which are highly responsive to changes in luminance. ing .

13) An electro-optical crystal such as a bismuth silicon oxide is used as a hold-type display element.

14) The display device is not a hold type. INDUSTRIAL APPLICABILITY As described above, according to the present invention, simple, low-cost, and excellent, especially in a hold-type display device such as a liquid crystal display device. It is possible to display moving images and images.

Also, by switching between the display method for video and the display method for still images, both types of display can be supported, and a good display can be obtained. .

In addition, the wide and thin display device can be easily used as a common display component (part) for various devices such as televisions and word processors. It spreads.

In addition, the display surface is divided and displayed appropriately according to the type of screen. 89 / 8ioeLT, 89 ϋ ¾ M

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Claims

The scope of the claims

1. A moving image driving means for causing a display means to display mainly a moving image, and a still image driving means for causing a still image to be mainly displayed, and the two means are switched by a predetermined method. A display device characterized by having switching means for switching.

2. The above display means

It is a display means using liquid crystal.

The moving image driving means,

When displaying an image, the display means using the liquid crystal drives the liquid crystal corresponding to the moving image.The liquid crystal driving unit for the moving image or the same lighting for the moving image corresponding to the moving image. The display device according to claim 1, characterized by having a lighting drive unit.

3. The moving means for a moving image

An intermediate image creating means for creating an intermediate image from two consecutive image data, etc .;

In displaying a moving image, an intermediate image inserting sub-means for inserting the intermediate image created above between the two consecutive images and displaying the intermediate image,

(1) There is a small field frequency adjustment method that reduces the display interval of the images, so that the display time of the moving image remains unchanged despite the insertion of the intermediate image. The display device according to claim 1, wherein the display device is operated.

4. The moving image driving means includes:

2. The display device according to claim 1, wherein the display device is an intermittent drive display driving means for displaying a screen by intermittent drive.

5. The moving means for a moving image

Displays a moving image with a higher field frequency than that of a still image. 2. The display device according to claim 1, wherein the display device is a field frequency display means.

6. The driving means for a moving image

The display according to claim 1, characterized in that it is a shutter time-division using moving image driving means that uses at least one of a shutter type and a time-division gray scale display method. apparatus.

7. The illumination drive unit for moving images,

Claims characterized in that when displaying each image, a short-term lighting small portion that turns on the display light shorter than a period corresponding to the field frequency is provided. The display device according to 2.

8. The illumination drive unit for moving images,

3. The display device according to claim 2, wherein the display device has a pulse lighting section that lights in a pulse form for each screen when displaying a moving image.

9. The switching means includes:

The method according to claim 1, wherein when receiving a video signal, the video signal is detected by a predetermined procedure and automatically switched to the moving image driving means. The display device according to any one of 8.

10. The automatic switching means comprises:

This is a difference detection type automatic switching method that detects a screen that moves faster than at least the difference from the previous screen before displaying it, and performs video-compatible driving based on this. The display device according to claim 9, wherein:

1 1. The still image driving means includes:

When displaying a still image, it has a normal lighting section that lights a light source such as a display light during the period corresponding to the field frequency. The display device according to any one of claims 1 to 8.

1 2. The driving means for a still image, When a still image is displayed, it has a normal lighting section that lights a light source such as a display light during a period corresponding to the field frequency. The display device according to claim 9.

1 3. The still image driving means,

When displaying a still image, it has a normal lighting section that lights a light source such as a display light during the period corresponding to the field frequency. The display device according to claim 10.

1 4. The above display means

It uses liquid crystal, and the liquid crystal display element is a high-speed responsive image element whose response time is at least shorter than that of one field. The display device according to any one of claims 1 to 8, which is a feature.

1 5. The above display means

It uses liquid crystal, and the liquid crystal display element is a high-speed responsive image element whose response time is at least shorter than that of one field. The display device according to claim 9, which is a feature.

1 6. The above display means

Liquid crystal is used, and the liquid crystal display element is a high-speed responsive image element whose response time is at least shorter than one field period. The liquid crystal display device according to claim 10, which is a feature.

1 7. The above display means

Liquid crystal is used, and the liquid crystal display element is a high-speed responsive image element whose response time is at least shorter than one field period. The liquid crystal display device according to claim 11, which is a feature.

1 8. The above display means

It uses liquid crystal, and the liquid crystal display element 13. The liquid crystal display device according to claim 12, characterized in that the liquid crystal display device is a high-speed response image element having a time interval shorter than at least one field period.

1 9. The above display means

Liquid crystal is used, and the liquid crystal display element is a high-speed response image element whose response time is at least faster than one field period. The liquid crystal display device according to claim 13, wherein:

20. The above display means

A video-capable display part consisting of a part of the display surface,

It consists of a still image display part consisting of the remaining display surface,

The moving image driving means,

In the case of a moving image, the display means is a moving image driving means for displaying a moving image mainly on the moving image compatible display portion,

The switching means includes:

The judgment sub-means for judging whether the image data to be displayed is a moving image or a still image, and if the judgment sub-means determines that the moving image is a moving image, the moving portion corresponding to the moving image on the display surface is provided to the display portion moving image driving device 9. The display device according to claim 1, further comprising: a driving control sub-means for a moving image on a display surface portion for performing an appropriate moving image display in an appropriate manner. The display device according to the above.

2 1. The display part that can be used for video

21. The display device according to claim 20, wherein the display device includes a central portion of the screen.

2 2. Moving image drive means for causing the hold type display means to display mainly moving images;

Similarly, a display device comprising: a still image driving means for displaying a still image mainly; and a switching means for switching between the two means by a predetermined method. .

2 3. The driving means for moving images

An intermediate image creation sub-means for creating an intermediate image from two consecutive image data, etc .;

In displaying a moving image, an intermediate image insertion sub-means for inserting and displaying the intermediate image created above between the two consecutive images,

(1) There is a field frequency reduction adjustment method that reduces the display interval of the images, so that the display time of the moving image remains unchanged despite the insertion of the above intermediate images. The display device according to claim 22, wherein the display device is configured to perform the following operations.

2 4. The moving image driving means,

23. The display device according to claim 22, wherein the display device is an intermittent drive display driving means for displaying a screen by intermittent drive.

25. The moving means for moving images

23. The display device according to claim 22, wherein the display device is a high field frequency display section that displays a moving image with a higher field frequency than that of a still image.

26. The moving image driving means

22. The display according to claim 22, characterized in that the shutter is a driving means for a moving image using a temporally divided shutter which uses at least one of the shutter method and the time-division gradation display method. apparatus.

2 7. The moving image lighting drive unit

Claims characterized in that, when displaying each image, a short-term lighting small portion for illuminating the display light shorter than a period corresponding to the field frequency is provided. 22. The display device according to 2 above.

2 8. The moving image lighting drive unit includes:

Lights in a pulsed manner for each screen when displaying moving images. 23. The display device according to claim 22, wherein the display device has a portion.

2 9. The switching means

When displaying an image, it is an automatic switching means for detecting this in a predetermined procedure and automatically switching to the moving image driving means. The display device according to any one of claims 22 to 28.

30. The automatic switching means comprises:

A difference detection type automatic switching means that detects a screen that moves faster than at least the difference from the previous screen before displaying it, and performs video-based driving based on this. 29. The display device according to claim 29, wherein the display device is characterized in that:

3 1. The still image driving means,

When displaying a still image, it has a normal lighting section that lights a light source such as display light during the period corresponding to the field frequency. A display device according to any one of claims 22 to 28.

3 2. The driving means for a still image,

When displaying a still image, it is characterized in that it has a normal lighting section that lights a light source such as a display light during the period corresponding to the field frequency. 29. The display device according to claim 29.

3 3. The still image driving means,

When displaying a still image, it has a normal lighting section that lights a light source such as a display light during the period corresponding to the field frequency. The display device according to claim 30.

3 4. The above display means

Claim 22-Claim 2 characterized by using a high-speed response element whose response time is at least shorter than the period of one field. The display device according to any one of 8 above.

3 5. The above display means 29. The method according to claim 29, wherein a high-speed response element whose response time is at least shorter than a period of one field is used. Display device.

3 6. The above display means

30. The liquid crystal display according to claim 30, wherein a high-speed response element is used in which the response time is at least shorter than the period of one field. apparatus.

3 7. The above display means

31. The liquid crystal display according to claim 31, wherein a high-speed response element whose response time is at least shorter than a period of one field is used. apparatus.

3 8. The above display means

33. The liquid crystal display according to claim 32, wherein a high-speed response image element whose response time is at least shorter than a period of one field is used. apparatus.

3 9. The above display means

34. The liquid crystal display according to claim 33, wherein a high-speed response element whose response time is at least shorter than a period of one field is used. apparatus.

40. The above display means

A video-capable display part consisting of a part of the display surface,

The moving image driving means,

In the case of a moving image, the display means is a driving means for a moving image on a display surface portion for displaying a moving image mainly on the moving image compatible display portion.

The switching means includes: The judgment sub-means for judging whether the image data to be displayed is a moving image or a still image, and if the judgment sub-means determines that the moving image is a moving image, the display portion moving image driving means displays the moving image corresponding to the display surface Claim 22 to Claim 28, characterized in that it has a drive control small means for a moving image on a display surface that allows an appropriate moving image to be displayed appropriately on a portion. Display device described in any of them.

4 1. The display part that can handle video

41. The display device according to claim 40, wherein the display device includes a central portion of the screen.

4 2. In the gradation display method of the display device,

A gradation display method for a display device, characterized in that a voltage adjustment method and a time division gradation display method are both used.

4 3. Regarding the gradation display method of the display device,

When the period of the video signal displayed by the display concealment is set to one field, the one field is divided into a plurality of subfields, and the subfield is divided into a plurality of subfields. 43. The display device according to claim 42, wherein at least one of the fields is performed by a voltage adjustment method, and the other subfields are performed by a time-division gradation display method. The gradation display method.

44. The gradation display method for a display device according to claim 43, wherein the number of the plurality of subfields is two.

45. The method according to claims 42 to 44, characterized in that the application time of the applied voltage pulse is adjusted according to the gradation of the image to be displayed. A gradation display method for a display device according to any one of the above.

4 6. If the gradient of the video image to be displayed is less than half of the maximum value, insert a pause of half the length of one field in the first half or the second half. Claims 42 to 44, which are characterized in that The display method of a display device according to any one of claims 1 to 4.

4 7. If the gradient of the video image to be displayed is less than half of the maximum value, insert a pause of half the length of one field into the first half or the second half. The gradation display method for a display device according to claim 45, wherein the gradation display method is performed.

4 8. The above display device

The gradation display method for a display device according to any one of claims 42, 43, or 44, characterized in that the display device is a hold type.

4 9. The above display device is

The gradation display method for a display device according to claim 45, wherein the display device is a hold type.

50. The above display device is

47. The gradation display method for a display device according to claim 46, wherein the display device is a hold type.

5 1. A field that divides one field into multiple sub-fields in order to display the video according to the gradient of each image. Division means and,

For at least one of the divided sub-fields of the field dividing means, the voltage is adjusted based on the gradient and displayed on the display means. Display action means and,

A time-division gradation display means for performing a time-division gradation display determined from the gradation in another subfield and causing the display means to perform display; A display device characterized by:

52. The plurality of sub-fields are 2 at equal time intervals, and the time-division gradation display means includes:

Only when the gradient is 50% or more, the subfield of 1 is changed to 100%. The display device according to claim 51, wherein the display device is a time-division gray scale display means corresponding to 50% or more, which is displayed with a gradient.

5 3. Gradient detection means for detecting the gradient of each image of the video to be displayed for each field,

An application time interval determining means for determining a time interval for applying a voltage for each field based on the detected gradient;

A voltage application means for applying a predetermined voltage at the beginning or at the end of one field only at the time interval determined by the application time interval determination means. Characteristic display device.

5 4. The above display device is

The display device according to any one of claims 51 to 53, characterized in that a hold-type display element is used for a pixel as a display means.

5 5. The above display device is

A high-speed response type display means in which the response time of the element of the display section is 16 ms or less, characterized by any one of claims 51 to 53. The display device according to claim 1.

5 6. The above display device is

The display device according to claim 55, wherein as the display means, a hold-type display element is used for a pixel.

5 7. The high-speed response type display means

The display device according to claim 55, wherein the display device is a display device using a liquid crystal.

5 8. The display means using the above liquid crystal

The display device according to claim 57, wherein the display device is a display device using an OCB mode liquid crystal.

5 9. The display means using the above liquid crystal is

The display device according to claim 57, wherein the display device uses a ferroelectric liquid crystal.

60. The display means using the above liquid crystal is

The display device according to claim 57, wherein the display device is a display means using an antiferroelectric liquid crystal.

6 1. A display device having a light source, shutter means, and display means for displaying a moving image,

One of the above shutter methods is

When displaying an image, when the light emitted from the light source passes through the shutter means and enters the display means, the light from the light source is transmitted and shielded. A display device characterized in that it is a transmission shielding switching means that switches between a state corresponding to displaying each image in a predetermined procedure.

62. The method according to claim 61, wherein the switching of the shutter means as the transmission / shielding switching means is characterized in that a cycle of the switching is synchronized with a screen update time of the display means. Display device.

6 3. The shutter means includes:

The display device 64 according to claim 62, wherein the scanning direction is a scanning direction-compatible shutter that is equivalent to the scanning direction of the display means. Ivy One means is

The display device according to claim 61, wherein the display device is a liquid crystal shutter.

6 5. The liquid crystal shutter is

The display device according to claim 64, wherein the display device is a liquid crystal shutter using a ferroelectric liquid crystal.

6 6. The liquid crystal shutter is The display device according to claim 64, wherein the display device is a liquid crystal shutter using a CB type liquid crystal.

6 7. The liquid crystal shutter is

The display device according to claim 64, wherein the display device is a liquid crystal shutter using a scattering type liquid crystal.

6 8. The shutter is

The display device according to any one of claims 61 to 63, characterized in that the display device is a mechanical shutter.

6 9. The mechanical shutter is:

7. A wheel having an opening having a predetermined size and shape corresponding to the size and shape of the display surface of the display means, and rotating at a predetermined angular speed each time. The display device according to 8.

7 0. The above display device is

The display device according to any one of claims 61 to 67, wherein a hold-type display element is used for a pixel as a display means.

7 1. The above display device

69. The display device according to claim 68, wherein as the display means, a hold-type display element is used for a pixel.

7 2. The above display device

The display device according to claim 69, wherein as the display means, a hold-type display element is used for a pixel.

7 3. A display device having a light source, light beam scanning means, and display means for displaying a moving image,

The light beam scanning means,

When the light emitted from the light source enters the display means via the light beam scanning means Further, the display device is characterized by being a periodic switching type light beam scanning means for periodically switching the traveling direction of the light source light in accordance with the display of each image.

7 4. The light beam scanning means,

The display device according to claim 73, wherein said display means is a rotating prism mirror for directing the reflected light source light in accordance with switching of an image.

7 5. The above rotating prism Mira

The display device according to claim 74, wherein the display device is a small rotating prism mirror.

7 6. The display means,

The display device according to any one of claims 73 to 75, wherein the display device is a display means using a liquid crystal.

7 7. The display means comprises:

The display device according to claim 76, characterized by having a high-speed response display element whose response speed is 30 ms or less.

7 8. The high-speed response display element

The display device according to claim 77, wherein the display device is a display device using a 0CB mode liquid crystal.

7 9. The high-speed response display element

The display device according to claim 77, wherein the display device is a display element using a ferroelectric mode liquid crystal.

80. The high-speed response display element comprises:

The display device according to claim 77, wherein the display device uses a liquid crystal in an antiferroelectric mode.

8 1. The above display device The display device according to any one of claims 73 to 75, wherein the display device is a projection type display device.

8 2. The above display device

The display device according to claim 76, wherein the display device is a projection display device.

8 3. The above display g

The display device according to claim 77, wherein the display device is a projection display device.

8 4. The above display device is

The display device according to claim 78, wherein the display device is a projection display device.

8 5. The above display device is

The display device according to claim 79, wherein the display device is a projection display device.

8 6. The above display device

The display device according to any one of claims 73 to 75, characterized in that a hold-type display element is used for a pixel as a display means.

8 7. The above display device is

88. The display device according to claim 77, wherein the display means uses a hold-type display element for a pixel.

8 8. The above display device

28. The display device according to claim 81, wherein as the display means, a hold-type display element is used for each pixel.

8 9. The above display device is

As a display means, a hold-type display element is used for the pixel. The display device according to claim 82, wherein the display device is provided.

9 0. The above display device is additionally

At least one intermediate image that should be inserted between two consecutive images At least one intermediate image that is created based on the two consecutive image data Creation means and,

The at least one intermediate image created above is inserted between the two consecutive images, and the image group to be displayed by this is inserted between the two consecutive images. Creation method Display image group creation means and,

By reducing the display time for each image, the display image group created above is reduced in order by the same moving speed of the moving image as when the intermediate image was not inserted. The display device according to any one of claims 73 to 75, characterized by having display speed control means for displaying.

9 1. The above display device is additionally

At least one intermediate image should be inserted between two consecutive images. At least one intermediate image is created based on the two consecutive image data. Means and

Insert the at least one intermediate image created above between the two consecutive images between the consecutive images to create a group of images to be displayed. Sutu display image group creation means and,

The display image group created above is displayed in sequence at the same moving speed of the moving image as when the intermediate image was not inserted by reducing the display time per image. The display device according to claim 86, further comprising display speed control means.

9 2. In a display device that displays moving images,

At least one intermediate image should be inserted between two consecutive images. At least one intermediate image created based on the two consecutive image data Image creation means and,

Insert the at least one intermediate image created above between the two consecutive images between the consecutive images to create a group of images to be displayed. The display image group creation means and

The display image group created above is displayed in order at the same moving speed of the moving image as when the intermediate image was not inserted by shortening the display time per image. A display device characterized by having display speed control means.

9 3. The interposed image creating means is:

A data storage means for storing video data of at least two screens, a calculation means for calculating the video data of the data storage means, and a calculation result of the calculation means for intermediate The display device according to claim 92, further comprising: a calculation result utilization creating means used for creating an insertion image.

9 4. The intermediate insertion image creating means,

103. The display device according to claim 92, wherein the display device is an intermediate image creating means employing an average value or the like for generating an intermediate image based on an average value or an interpolated value of a moving image before and after.

9 5. The intermediate insertion image creating means,

By detecting motion at least based on the continuous data before and after the data, it can be used as a moving-use intermediate image generating means for generating an interposed image. The display device according to claim 92, which is a feature.

9 6. The intermediate insertion image creating means,

At least a moving vector that generates an intermediate image with an eye on the moving vector between each of the images detected based on the continuous preceding and following image data The display device according to claim 92, wherein the display device is an inter-image creation unit.

9 7. The display device is:

The display device 98 according to any one of claims 92 to 96, wherein the display device has a liquid crystal display means using a liquid crystal as the display means. The liquid crystal display means

The display device according to claim 97, wherein the display device is a display device using an OCB mode liquid crystal.

9 9. The liquid crystal display means comprises:

The display device according to claim 97, wherein the display device is a display unit using a ferroelectric liquid crystal.

100. The liquid crystal display means comprises:

The display device according to claim 97, wherein the display device is a display device using an antiferroelectric liquid crystal.

1 0 1. The above display device

The display device according to any one of claims 92 to 96, wherein a hold-type display element is used for a pixel as a display means.

102. Pixels are arranged in a large number in a row in the vertical and horizontal directions, and thus, have a moving image corresponding display means capable of displaying a moving image, and each pixel of the moving image corresponding means has:

An electric field applying means for applying an electric field;

An electric field holding means for holding the applied electric field;

A display element for performing display by applying an electric field;

A display means for discharging the electric field held by the electric field holding means within a predetermined time.

1 0 3. The electric field holding means,

Maintain the applied electric field for one field. It is a means of holding

The discharging means,

10. A field discharge means for discharging an electric field held by said one field electric field applying means within one field. The display device according to 2.

1 0 4. The display device comprises:

An active matrix substrate on which a TFT for driving the electric field applying means, the electric field holding means and a display element or forming a part thereof is formed; The display device according to claim 102, wherein the display device is characterized in that:

105. The method according to any one of claims 102 to 105, wherein the discharging means is formed on the active matrix substrate. A display device according to any one of the preceding claims.

10 6. Ij display element (5,

The display device according to any one of claims 102 to 105, characterized in that the display device is a display element using a liquid crystal.

1 0 7. The display element is:

The display device according to any one of claims 102 to 105, characterized in that the display device is an EL display element.

1 0 8. The discharging means

The material constituting the display element, which is present in the portion of the electric field applying means to which a high or low electric field is applied, is used as a display element that functions by discharging due to its appropriate resistance. The display device according to any one of claims 102 to 105, characterized in that the display device is a discharging means.

1 0 9. The discharging means

A display element present in a portion of the electric field applying means to which a high or low electric field is applied. The material according to claim 106, characterized in that the substance constituting the material is a display element / multiple discharge means that performs a function by discharging with an appropriate resistance. Display device.

1 10. The discharging means

The material constituting the display element, which is present at the portion of the electric field applying means to which a high or low electric field is applied, discharges by a suitable resistance and functions as a display element. The display device according to claim 107, wherein the display device is a discharging unit.

10. The display device according to claim 10, wherein the electrical conductivity of the resistance of the display element / discharge means is 10 -10 di-mens or more.

10. The display device according to claim 10, wherein the conductivity of the resistance of the display element / discharge means is 10 -10 dimens or more.

11. The display device according to claim 10, wherein the electrical conductivity of the resistance of the display element and discharge means is 10 -10 diment or more. The active matrix board is

Pixel electrode and

The display device according to claim 102, wherein the display device has an auxiliary capacitor having a smaller capacity than the pixel electrode.

1 1 5. The active matrix board is

The display device according to claim 102 or 103, wherein the display device does not have an auxiliary capacitor.

1 1 6. The above display device

The display device according to any one of claims 102 to 105, wherein a hold-type display element is used for a pixel as a display means. .

1 17 7. Many pixels are arranged vertically and horizontally, thereby It has moving image corresponding display means capable of displaying moving images, and each pixel of the moving image corresponding means has

An electric field applying means for applying an electric field;

Electric field holding means for holding the applied electric field;

A display element that performs display by applying an electric field, and that displays black when the electric field is low;

And a discharge means for discharging the electric field held by the electric field holding means within a predetermined time.

1 18. The electric field holding means,

The one-field electric field holding means for holding the applied electric field for one field.

The discharging means,

11. A field discharge means for discharging an electric field held by said one-field electric field applying means within one field. The display device according to 7.

11. The display device according to claim 11, further comprising black display voltage supply means for supplying a black display voltage.

There are a large number of pixels arranged side by side in the vertical and horizontal directions, and a moving image corresponding display means capable of displaying a moving image is provided.

An electric field applying means for applying an electric field;

Electric field holding means for holding the applied electric field;

A display element that performs display by applying an electric field, and displays a white image when the electric field is low;

A display means for discharging an electric field held by the electric field holding means within a predetermined time.

1 2 1. The electric field holding means comprises:

A one-field electric field holding means for holding the applied electric field for one field;

The discharging means,

13. The one-field discharge means for discharging the electric field held by the one-field electric field applying means within one field. The display device according to 0.

12. The display device according to claim 12, further comprising black display voltage supply means for supplying a black display voltage.

1 2 3. The display element is:

The display device according to any one of claims 120 to 122, characterized in that a liquid crystal in OCB mode is used.

1 2 4. The above display device

The display device according to any one of claims 11 to 12, wherein a hold-type display element is used for each pixel as the display means. .

1 25. A display device in which a large number of pixels are arranged in a row in the vertical and horizontal directions, and which has a moving image corresponding display means capable of displaying a moving image, and performs display by applying an electric field. The driving method of

An electric field application step for applying an electric field to the display element of the moving image corresponding display means for display;

An electric field holding step for holding the applied electric field,

A discharge step for discharging the held electric field within a predetermined time and an alternating step for alternating the polarity of the electric field applied by the electric field application step according to a predetermined rule. And

The discharge path of the display element discharged in the discharge step is as follows. A method of driving a display device, comprising: a display element alternating discharge path supply step for supplying a voltage synchronized with an alternating electric field.

1 2 6. The above display means

The display device driving method according to claim 125, wherein the display device is a hold-type display device.

1 2 7. A display device for performing display by applying an electric field, comprising an electric field applying means for applying an electric field,

Electric field holding means for holding 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 for exhibiting the action of the discharge means;

Alternating polarity control means for controlling the electric field application means to apply an electric field by alternating the polarity of the voltage;

A display device characterized by having alternating discharge potential applying means for applying a voltage synchronized with the alternating electric field to the discharge potential supplying means.

1 2 8. The above display device is

28. The display device according to claim 127, wherein as the display means, a hold-type display element is used for each pixel.