KR20120128859A - Method for displaying stereo-scopic image - Google Patents

Abstract

PURPOSE: A three-dimensional image display method is provided to secure shutter switching time of a shutter glass by controlling light emitting section of a light emitting block based on a light emitting section of a neighboring light emitting block. CONSTITUTION: A display device displays data corresponding to a left eye image or a right eye image on a display panel by light emitting blocks. The display device turns off first-k light emitting blocks in the entire off section of a frame section. The display device emits the light of first k light emitting blocks in a sequential on section. The display device starts an opening and closing motion of the left and right shutters displayed within the entire off section.

Description

Stereoscopic image display method {METHOD FOR DISPLAYING STEREO-SCOPIC IMAGE}

The present invention relates to a three-dimensional image display method, and more particularly to a three-dimensional image display method of the shutter glasses method.

In general, a liquid crystal display displays a two-dimensional planar image. Recently, as demand for 3D stereoscopic images increases in fields such as games and movies, 3D stereoscopic images are displayed using the liquid crystal display.

In general, stereoscopic images display stereoscopic images using the principle of binocular parallax through two eyes of a person. For example, since two eyes of a person are separated by a certain distance, images of each eye viewed from different angles are input to the brain. The stereoscopic image display device uses human binocular disparity.

As a method of using the binocular parallax, there are a spectacle method and an autostereoscopic method. The eyeglass method includes a passive polarized glasses method using a polarization filter having different polarization axes in both eyes, and a left eye shutter and a right eye image which are divided in time and periodically displayed, and a left eye shutter synchronized with the period. Active shutter glasses using glasses for opening and closing the right eye shutter, and the like. In the shutter glasses method, the left eye or right eye image is displayed on the display panel and the left eye shutter or the right eye shutter is opened during the vertical blanking period to recognize the left eye image or the right eye image displayed on the display panel.

Meanwhile, when a 3D stereoscopic image is implemented in a general 60 Hz liquid crystal display, a left eye image and a right eye image are provided at 30 Hz, respectively. Problems that are visible to the observer's eye arise. In addition, when the 3D stereoscopic image is implemented in a 120Hz liquid crystal display device which is driven at a higher frequency than the 60Hz, the left and right eye images are provided at 60Hz in both eyes, so that they are visually compared to the 60Hz level, but are still smoothly viewed compared to the left eye image and the The right eye image is mixed to generate crosstalk.

In order to increase the viewing period in the 120Hz liquid crystal display, a method of driving the vertical blanking period up to about 30% of one frame has been developed. However, since the liquid crystal display is driven by a progressive scan method, the time for which line data is applied to a plurality of horizontal lines of the liquid crystal display is different and the response speed of the liquid crystal is different. When the left eye image and the right eye image are alternately displayed on the display panel to implement the 3D stereoscopic image, the left eye image and the right eye image are mixed to generate the crosstalk. In particular, since the response speed is slower from the upper part of the display panel to the lower part, the cross talk is more severely generated at the lower side than at the upper side of the display panel. There is a problem that the quality of the stereoscopic image is degraded by such cross talk.

Accordingly, the technical problem of the present invention has been devised in this respect, and an object of the present invention is to provide a stereoscopic image display method for improving crosstalk of a stereoscopic image.

The stereoscopic image display method according to an embodiment for realizing the object of the present invention is the first to kth (k is a natural number) light emitting blocks arranged in accordance with the scan direction in which the image is displayed Data corresponding to a left eye or right eye image is output to a display panel in which display blocks are defined. The first to kth light emitting blocks are turned off in the entire off period of the frame period. The first to kth light emitting blocks sequentially emit light in the sequentially on period after the entire off period in the frame period. The opening and closing operations of the left eye shutter and the right eye shutter included in the shutter glasses are started to correspond to the left eye image or the right eye image displayed on the display panel within the entire off period.

In the present embodiment, sequentially emitting light of the first to kth light emitting blocks, at least one of the first to kth light emitting blocks may have an overlapping period overlapping the light emitting period of the previous light emitting block.

In the present embodiment, sequentially emitting the first to k th light emitting blocks, at least one of the first to k th light emitting blocks may have a light emitting section spaced apart from the light emitting section of the previous light emitting block. have.

In the present exemplary embodiment, the first light emitting block may emit light for the first light emitting period after a preset time from the time when the left eye or right eye data is output to the display panel.

In the present embodiment, the opening and closing operations of the left eye shutter and the right eye shutter included in the shutter glasses may include one shutter corresponding to an image displayed on the display panel among the left eye shutter and the right eye shutter. The first step may include opening and then closing the other of the left eye shutter and the right eye shutter.

According to the three-dimensional image display method according to an embodiment of the present invention, by controlling the light emitting period of each light emitting block individually based on the light emitting period of the neighboring light emitting block to ensure sufficient time to open and close the shutter glasses of the left eye 3D image Can improve crosstalk (3D crosstalk). In addition, it is possible to improve the 3D crosstalk and luminance non-uniformity caused by leakage light of neighboring light emitting blocks.

1 is a block diagram of a display device according to a first exemplary embodiment of the present invention.
FIG. 2 is a timing diagram of driving signals for explaining a 3D image display method by the display device of FIG. 1.
3 is a timing diagram of driving signals for explaining a 3D image display method according to Embodiment 2 of the present invention.
4 is a timing diagram of driving signals for explaining a 3D image display method according to Embodiment 3 of the present invention.
5 are timing diagrams of driving signals for explaining a 3D image display method according to Embodiment 4 of the present invention.
6 are timing diagrams of driving signals for explaining a 3D image display method according to a fifth embodiment of the present invention.
7 is a graph illustrating crosstalk values according to embodiments of the present invention.
8 are timing diagrams of driving signals for explaining a 3D image display method according to a sixth embodiment of the present invention.
9 are timing diagrams of driving signals for explaining a 3D image display method according to a seventh embodiment of the present invention.
10 are timing diagrams of driving signals for explaining a 3D image display method according to Embodiment 8 of the present invention.

Hereinafter, exemplary embodiments of the display device of the present invention will be described in detail with reference to the drawings.

1 is a block diagram of a display device according to an embodiment of the present invention.

Referring to FIG. 1, the display device includes a display panel 100, a panel driver 200, a timing controller 300, a light supply unit 400, a light source driver 500, and shutter glasses 600.

The display panel 100 includes a plurality of pixels P for displaying an image. For example, each pixel includes a switching element TR electrically connected to a gate line GL and a data line DL intersecting each other, a liquid crystal capacitor CLC and a storage capacitor CST connected to the switching element TR. ). The display panel 100 may include two substrates facing each other and a liquid crystal interposed between the two substrates.

The panel driver 200 may include a gate driver 210 and a data driver 230. The gate driver 210 generates a gate signal for driving the gate line GL and provides the gate signal to the gate line GL. The data driver 230 converts the data received from the timing controller 300 into a data voltage. The data driver 230 provides the data voltage to the data line DL.

The timing controller 300 controls the overall driving timing of the display device based on a synchronization signal received from the outside. The timing controller 300 provides the data driver 230 with a 3D image signal received from the outside or generated by the timing controller 300. The 3D video signal includes a left eye data frame and a right eye data frame. The timing controller 300 controls the driving of the light source driver 500 based on the image displayed on the display panel 100. In addition, the timing controller 300 controls the driving of the shutter glasses 600 based on the image displayed on the display panel 100.

The light supply unit 400 may include a light guide plate 410 and a light source unit 450.

The light guide plate 410 is disposed under the display panel 100. The light source unit 450 includes a plurality of first to kth light emitting blocks (k is a natural number) that is arranged in a scanning direction in which an image is scanned and sequentially drives in the scanning direction. Hereinafter, the light source unit 450 includes first to fourth light emitting blocks 450a, 450b, 450c, and 450d as an example. The first to fourth light emitting blocks 450a, 450b, 450c, and 450d are included, and each light emitting block includes a light source for generating light. For example, the first to fourth light emitting blocks 450a, 450b, 450c, and 450d may be disposed on one side edge of the light guide plate 410, as shown. Alternatively, the first to fourth light emitting blocks 450a, 450b, 450c, and 450d may be disposed at both edges of the light guide plate 410 facing each other. Alternatively, the light source unit 450 may omit the light guide plate 410 and may be disposed directly under the display panel 100 in a direct structure. In the case of the direct type structure, the light source may be a fluorescent lamp or a light emitting diode.

The light source driver 500 controls emission and extinction of the first to fourth light emitting blocks 450a, 450b, 450c, and 450d of the light source unit 450 according to an image displayed on the display panel 100. The first to fourth light emitting blocks 450a, 450b, 450c, and 450d are sequentially driven. The light source driver 500 individually controls the light emission period of each of the first to fourth light emitting blocks 450a, 450b, 450c, and 450d. Accordingly, an entire off period in which all of the first to fourth light emitting blocks 450a, 450b, 450c, and 450d are turned off during the frame period, and the first to fourth light emitting blocks 450a, 450b, 450c, and 450d are turned off. It has a sequential on interval that emits light sequentially.

The shutter glasses 600 includes a left eye shutter 610 and a right eye shutter 620 which are liquid crystal shutters. The shutter glasses 600 selectively opens and closes the left eye shutter 610 and the right eye shutter 620 based on a shutter control signal provided from the timing controller 300. The shutter control signal includes a left eye open signal and a close signal for opening and closing the left eye shutter 610, a right eye off signal and a close signal for opening and closing the right eye shutter 620. The shutter control signal is arranged in the order of a left eye open signal, a right eye close signal, a right eye off signal, and a left eye close signal in consideration of a liquid crystal response speed having a shorter polling time than a rising time.

For example, when a left eye data frame is output to the display panel 100 in an Nth frame (N is a natural number), the timing controller 300 controls the left eye open signal and the left eye signal within the entire off period within the Nth frame. The right eye cloth signal is provided in sequence. When the right eye data frame is output to the display panel 100 in the N + 1th frame, the timing controller 300 may turn off the right eye signal and the left eye close signal within the entire off period in the N + 1th frame. Provide in turn. Accordingly, the shutter eyeglasses 600 are configured to emit the left eye shutter 610 based on the left eye open signal, the right eye close signal, the right eye off signal, and the left eye close signal provided from the timing controller 300. The left eye shutter signal for controlling the opening and closing of the left eye shutter signal and the right eye shutter signal for controlling the opening and closing of the right eye shutter 620 are generated to drive the left eye shutter 610 and the right eye shutter 620.

The shutter glasses 600 starts the opening / closing operation of the shutter glasses 600 within the entire off period, before the shutters 610 and 620 are fully opened and closed according to the liquid crystal response speed of the shutter glasses 600. Crosstalk (3D crosstalk) between the left eye image and the right eye image to be viewed can be prevented. The entire off period may be equal to or longer than the liquid crystal response speed of the shutter glasses 600.

Hereinafter, the first, second, third and fourth display blocks of the display panel 100 to which the first, second, third and fourth light emitting blocks 450a, 450b, 450c, and 450d respectively correspond. An example of providing light to each of the fields DB1, DB2, DB3, and DB4 will be described as an example, and the left eye data frame is white data and the right eye data frame is black data.

FIG. 2 is a timing diagram of driving signals for explaining a 3D image display method by the display device of FIG. 1.

1 and 2, one frame based on the vertical synchronization signal VSYNC may include an active period ACTIVE and a blanking period VBI. The active section ACTIVE is a section in which data is substantially output to the display panel 100, and the blanking section VBI is a section in which the data is maintained. The blanking period VBI may be set to about 5% to about 6% of one frame period.

During the Nth frame F (N), the panel driver 200 outputs a left eye data frame to the display panel 100. The left eye data frame may include first, second, third, and fourth data blocks LI1, LI2, LI3, and LI4 for left eyes. The data frame may be data corresponding to 920 × 1080 resolution, and each data block may be data corresponding to 920 × 270 resolution.

During the first period I11 of the Nth frame F (N), the left eye first data block LI1 is sequentially output in units of horizontal lines, and the second of the Nth frame F (N) is output. The left eye second data block LI2 is sequentially output in units of horizontal lines during the period I12, and the third data block for the left eye during the third period I13 of the Nth frame F (N). Outputs LI3 sequentially in horizontal line units and sequentially outputs the left eye fourth data block LI4 in horizontal line units during a fourth section I14 of the Nth frame F (N). . For example, the first line data of the left eye first data block LI1 is the first display block DB1 according to the liquid crystal response speed LC_RS after the middle period of the second section I2. The image corresponding to the line data is displayed, and the last line data of the left eye first data block LI1 is the third section I3 according to the liquid crystal response speed LC_RS. After the mid-term), an image corresponding to the last line data is displayed.

In this manner, the panel driver 200 outputs the left eye data frame to the display panel 100 during the N-th frame F (N), and the display panel 100 outputs the N-th frame ( The left eye image is displayed by being delayed by the liquid crystal response speed with respect to the starting point of F (N).

During the N + 1th frame F (N + 1), the panel driver 200 outputs a right eye data frame to the display panel 100. The right eye data frame includes first, second, third and fourth data blocks RI1, RI2, RI3, and RI4 for right eye. The panel driver 200 sequentially outputs the right eye first data block RI1 in horizontal line units during the first section I21 of the N + 1th frame F (N + 1), and During the second section I22 of the N + 1 frame F (N + 1), the right eye second data block RI2 is sequentially output in units of horizontal lines, and the N + 1 frame F (N +3) sequentially outputs the right eye third data block RI3 in the horizontal line unit during the third section I23, and the fourth section of the N + 1 frame F (N + 1). During I24, the right eye fourth data block RI4 is sequentially output in units of horizontal lines.

In this manner, the panel driver 200 outputs the right eye data frame to the display panel 100 during the N + 1th frame F (N + 1), and the display panel 100 The right eye image is displayed by being delayed by the liquid crystal response speed LC_RS with respect to the start point of the N + 1th frame F (N + 1).

On the other hand, the light source driver 500 may include the first to fourth parts after the set time Rt for the start of one frame in consideration of the driving margin time of the display panel 100 according to the liquid crystal response speed LC_RS. The light emitting blocks 450a, 450b, 450c, and 450d are sequentially driven. The set time Rt may be at least longer than the liquid crystal response speed of the display panel 100.

For example, the light source driver 500 may drive the light source 450, that is, the first, second, third, and third light emitting units 450a, 450b, 450c, and 450d to drive the light source unit 450. The fourth emission control signals BLC1, BLC2, BLC3, and BLC4 are generated. Each of the first, second, third, and fourth emission control signals BLC1, BLC2, BLC3, and BLC4 includes a light emission period having a high level for emitting each light emission block at a frame period T, and each light emission block. An unlit period with unlit low levels may be repeated.

The first light emitting block 450a emits and turns off in response to the first light emission control signal BLC1. The first emission control signal BLC1 has a first emission period OP11, and the first emission period OP11 has an Nth frame F (N) according to the liquid crystal response speed of the display panel 100. It starts from the time point which the said setting time Rt elapsed from the start point of.

The first light emitting block 450a emits light during the first light emitting period OP1 in response to the first light emission control signal BLC1. As shown in the drawing, the first light emitting block 450a is configured to respond to the first light emitting control signal BLC1 and the first light emitting block 450a starts from the completion of output of the last line data of the third left eye data block LI3. Light is emitted during one light emission period OP1. The first emission period OP11 may be about 1/5 times the frame period T. In the first emission period OP11, the first display block DB1 completes a left eye first block image corresponding to the left eye first data block LI1, and the second, third and third images are completed. In the four display blocks DB2, DB3, and DB4, second, third, and fourth block images for the left eye are not completed by the liquid crystal response speed. As a result, the first light emitting block 450a emits light in a section in which the first block image for the left eye is completed and maintained in the first display block DB1.

The second light emitting block 450b emits and turns off in response to the second light emission control signal BLC2. The second emission control signal BLC2 has a second emission period OP12. The second light emitting block 450b is turned on immediately after the first light emission period OP11 in response to the second light emission control signal BLC2 and emits light during the second light emission period OP12. The second emission period OP12 may be about 1/5 times the frame period T. In the second emission period OP12, the second display block DB2 completes a second left eye image corresponding to the second left eye data block LI2. Meanwhile, in the first display block DB1, the left eye first block image and the right eye first block image are mixed as the right eye first data block RI1 is provided. In addition, the third and fourth display blocks DB3 and DB4 may not complete the third and fourth block images for the left eye by the liquid crystal response speed. As a result, the second light emitting block 450b emits light in a section in which the second block image for the left eye is completed and maintained in the second display block DB2.

The third light emitting block 450c emits light and turns off in response to the third light emission control signal BLC3. The third emission control signal BLC3 has a third emission period OP13. The third light emitting block 450c is turned on immediately after the second light emitting period OP12 in response to the third light emission control signal BLC3 and emits light during the third light emitting period OP13. The third emission period OP13 may be about 1/5 times the frame period T. In the third emission period OP13, the third display block DB3 completes a left eye third block image corresponding to the third left eye data block LI3. Meanwhile, a first block image for the right eye is displayed on the first display block DB1, and the second display block DB2 is a mixed image in which the second block image for the left eye and the second block image for the right eye are mixed. . In addition, the fourth display block DB4 has an incomplete left eye fourth block image. As a result, the third light emitting block 450c emits light in a section in which the third block image for the left eye is completed and maintained in the third display block DB3.

The fourth light emitting block 450d is turned on immediately after the third light emitting period OP13 in response to the fourth light emission control signal BLC4 and emits light during the fourth light emitting period OP14. The fourth emission period OP14 may correspond to about 1/5 of the frame period T. In the fourth emission period OP14, the fourth display block DB4 completes a left eye fourth block image corresponding to the left eye fourth data block LI4. Meanwhile, a first block image for the right eye is displayed on the first display block DB1, a second block image for the left eye and a second block image for the right eye are mixed in the second display block DB2, and the third display image is mixed with the third display block DB2. The left eye third block image and the right eye third block image are mixed in the display block DB3. As a result, the fourth light emitting block 450d emits light in a section in which the left eye fourth block image is completed and maintained in the fourth display block DB4.

As shown, the light source 450 repeats the operation in the frame period T with a delay difference Dt with respect to a start point of the N-th frame F (N). The operation period of the light source unit 450 is sequentially turned on corresponding to about 4T / 5 sections in which the first, second, third and fourth light emitting blocks 450a, 450b, 450c, and 450d sequentially emit light. SQ_ON1), and the first, second, third and fourth light emitting blocks 450a, 450b, 450c, and 450d correspond to a section T / 5 before the first light emitting block 450a emits light. All have a total off period ALL_OFF1 that goes out.

On the other hand, the shutter glasses 600 generates a left eye shutter signal LSS and a right eye shutter signal RSS to drive the left eye shutter 610 and the right eye shutter 620. Each of the left eye shutter signal LSS and the right eye shutter signal RSS may open a shutter in response to a high level shutter signal, and may close the shutter in response to a low level shutter signal.

The shutter eyeglasses 600 open and close the left eye shutter 610 and the right eye shutter 620 in response to a left eye shutter signal LSS and a right eye shutter signal RSS.

According to the operation of the display panel 100 and the light source unit 450, the display panel 100 displays the left eye image from the first emission period OP11 to the fourth emission period OP14. The left eye shutter signal LSS has an open period OPP corresponding to the first to fourth emission periods OP11, OP12, OP13, and OP14, and uses the left eye signal in response to the open period OPP. Shutter 610 is open. The right eye shutter signal RSS has a cloth period CLP corresponding to the first to fourth light emitting periods OP11, OP12, OP13, and OP14, and responds to the cloth period CLP. The right eye shutter 620 is closed. Initially, each of the open period OPP and the cloth period CLP is an entire off period in which all of the first, second, third, and fourth light emitting blocks 450a, 450b, 450c, and 450d are turned off. ).

The liquid crystal response speed (SLC_RS) of the left eye shutter 610 and the right eye shutter 620 is started by opening and closing operations of the left eye shutter 610 and the right eye shutter 620 within the all off period ALL_OFF1. ), The liquid crystal margin time can be secured. The all off period ALL_OFF1 may be longer than the liquid crystal response speed of the shutter glasses 600. Accordingly, 3D crosstalk may be prevented by completely opening and closing (or closing and opening) the left eye shutter 610 and the right eye shutter 620 in a section in which the left eye image (or right eye image) is substantially maintained.

In addition, in consideration of the characteristic that the polling time is longer than the rising time according to the liquid crystal response speed of the shutter glasses 600, the rising time of the left eye shutter signal LSS is higher than that of the right eye shutter signal RSS. Implementing first may reduce the driving delay time of the shutter glasses 600. Therefore, the open period OPP of each of the left and right eye shutter signals LSS and RSS may be longer than the closing period CLP.

Accordingly, crosstalk between the left eye image and the right eye image due to the liquid crystal response speed SLC_RS of the shutter glasses 600 may be prevented.

Hereinafter, the same reference numerals are given to the same elements as in the above-described embodiment, and repeated descriptions will be briefly or omitted.

3 is a timing diagram of driving signals for explaining a 3D image display method according to Embodiment 2 of the present invention.

1 and 3, as illustrated in FIG. 2, the panel driver 200 may include left-eye data frames LI1 and LI2, which are arranged on the display panel 100 during the Nth frame F (N). LI3 and LI4 are output, and the right eye data frames RI1, RI2, RI3, and RI4 are output to the display panel 100 during the N + 1th frame F (N + 1).

The light source driver 500 may include the first to fourth light emitting blocks from the time when the set time Rt elapses from the start of one frame in consideration of the liquid crystal margin time of the display panel 100 according to the liquid crystal response speed. 450a, 450b, 450c, and 450d are sequentially driven.

The first light emitting block 450a emits and turns off in response to the first light emission control signal BLC1. The first emission control signal BLC1 has a first emission period OP11, and the first emission period OP11 has an Nth frame F (N) according to the liquid crystal response speed of the display panel 100. It starts from the point where the set time Rt elapsed from the start point of. The first light emitting block 450a emits light during the light emitting period OP11 from the time when the output of the last line data of the third left eye data block LI3 is completed in response to the first light emission control signal BLC1. do. The first emission period OP11 may be about 1/5 times the frame period T. As a result, the first light emitting block 450a emits light in a section in which the first block image for the left eye is completed and maintained in the first display block DB1.

The second light emitting block 450b emits and turns off in response to the second light emission control signal BLC2. The second emission control signal BLC2 has a second emission period OP12, and the second emission period OP12 defines a first overlapping period OV1 overlapping with a later stage of the first emission period OP11. Have The first overlap period OV1 may be about 1/4 times the first emission period OP11. The second light emitting block 450b is turned on at a later stage of the first light emitting period OP11 corresponding to the first overlapping period OV1 in response to the second light emission control signal BLC2, and thus the second light emitting block 450b is turned on. Light is emitted during the light emission period OP12. The second emission period OP12 may be about 1/5 times the frame period T. In the second emission period OP12, the second display block DB2 completes a second left eye image corresponding to the second left eye data block LI2. Accordingly, the second light emitting block 450b emits light in a section in which the second block image for the left eye is completed and maintained in the second display block DB2.

The first overlap period OV1 may be set in various ways. That is, the first overlapping period OV11 may be determined based on the liquid crystal response speed from the time when the second block image for the left eye is completed in the second display block DB2 of the first emission period OP11. Various settings may be made within the time point at which the emission period OP11 ends. The first overlap period OV11 may be about 1/20 times the frame period T.

The third light emitting block 450c emits light and turns off in response to the third light emission control signal BLC3. The third light emission control signal BLC3 has a third light emission period OP13, and the third light emission period OP13 has a second overlapping period OV12 overlapping with a later stage of the second light emission period OP12. Have The second overlap period OV12 may be about 1/20 times the frame period T. The third light emitting block 450c is turned on at a later stage of the second light emitting period OP12 corresponding to the second overlapping period OV12 in response to the third light emission control signal BLC3. Light is emitted during the light emission section OP13. The third emission period OP13 may be about 1/5 times the frame period T. In the third emission period OP13, the third display block DB3 completes a left eye third block image corresponding to the third left eye data block LI3. Accordingly, the third light emitting block 450c emits light in a section in which the third block image for the left eye is completed and maintained in the third display block DB3.

The second overlap period OV12 may be set in various ways. That is, the second overlap period OV12 is the second overlap image from the time when the third block image for the left eye is completed in the third display block DB3 of the second emission period OP12 according to the liquid crystal response speed. Various settings may be made within the time point at which the emission period OP11 ends.

The fourth light emitting block 450d emits and turns off in response to the fourth light emission control signal BLC4. The fourth light emission control signal BLC4 has a fourth light emission period OP14, and the fourth light emission period OP14 defines a third overlapping period OV13 overlapping with a later stage of the third light emission period OP13. Have The third overlap period OV13 may be about 1/20 times the frame period T. The fourth light emitting block 450d is turned on later in the third light emitting period OP13 corresponding to the third overlapping period OV13 in response to the fourth light emission control signal BLC4 and is thus turned on. Light is emitted during the light emission section OP14. The fourth emission period OP14 may be about 1/5 times the frame period T. In the fourth emission period OP14, the fourth display block DB4 completes a left eye fourth block image corresponding to the left eye fourth data block LI4. Accordingly, the fourth light emitting block 450d emits light in a section in which the left eye fourth block image is completed and maintained in the fourth display block DB4.

The third overlap period OV13 may be set in various ways. That is, the third overlapping period OV13 may be configured to be generated from the third overlapping period OV13 from the time when the fourth block image for the left eye is completed in the fourth display block DB4 of the third emission period OP31 according to the liquid crystal response speed. Various settings may be made within a time point at which the emission period OP13 ends. In addition, the first, second and third overlapping periods OV11, OV12, and OV13 may be set differently.

As shown, the light source 450 repeats the operation in the frame period T with a delay difference Dt with respect to a start point of the N-th frame F (N). The operation period of the light source unit 450 is sequentially turned on corresponding to about 3T / 5 sections in which the first, second, third and fourth light emitting blocks 450a, 450b, 450c, and 450d sequentially emit light. SQ_ON2) and corresponding to about 2T / 5 sections before the first light emitting block 450a emits light by the first, second and third overlapping sections OV12, OV12, and OV13. The second, third, and fourth light emitting blocks 450a, 450b, 450c, and 450d may have a total off period ALL_OFF2.

The opening and closing operations of the left eye shutter 610 and the right eye shutter 620 are started within the all off period ALL_OFF2, so that the liquid crystal response speed of the left eye shutter 610 and the right eye shutter 620 is SLC_RS. ), The liquid crystal margin time can be secured. Accordingly, 3D crosstalk may be prevented by completely opening and closing (or closing and opening) the left eye shutter 610 and the right eye shutter 620 in a section in which the left eye image (or right eye image) is substantially maintained. The all off period ALL_OFF2 may be longer than the liquid crystal response speed of the shutter glasses 600. The total off period ALL_OFF2 may sufficiently secure the liquid crystal driving time of the shutter glasses 600 when compared to the first embodiment described in FIG. 2.

Accordingly, crosstalk between the left eye image and the right eye image due to the liquid crystal response speed SLC_RS of the shutter glasses 600 may be prevented.

4 is a timing diagram of driving signals for explaining a 3D image display method according to Embodiment 3 of the present invention.

Referring to FIGS. 1 and 4, as described with reference to FIG. 2, the panel driver 200 may include left-eye data frames LI1 and LI2, which are arranged on the display panel 100 during the Nth frame F (N). LI3 and LI4 are output, and the right eye data frames RI1, RI2, RI3, and RI4 are output to the display panel 100 during the N + 1th frame F (N + 1).

The light source driver 500 may include the first to fourth light emitting blocks from a time point when the set time Rt has elapsed with respect to a start point of one frame in consideration of the driving margin time of the display panel 100 according to the liquid crystal response speed. 450a, 450b, 450c, and 450d are sequentially driven.

Compared to the second embodiment described above, the first, second, third and fourth of the first, second, third and fourth light emission control signals BLC1, BLC2, BLC3, and BLC4 according to the present embodiment. Each of the fourth emission periods OP21, OP22, OP23, and OP24 is longer than each of the first, second, third, and fourth emission periods OP11, OP12, OP13, and OP14.

The first emission control signal BLC1 has the first emission period OP21 from a time point when the set time Rt elapses with respect to a start point of the Nth frame F (N). The first light emitting block 450a emits light during the first light emitting period OP21 after the set time Rt in response to the first light emission control signal BLC1. The first emission period OP21 may be about 1/4 times the frame period T.

The second light emitting block 450b emits and turns off in response to the second light emission control signal BLC2. The second light emission control signal BLC2 has a second light emission period OP22, and the second light emission period OP22 defines a first overlapping period OV21 overlapping with a later stage of the first light emission period OP1. Have The first overlap period OV11 may be about 1/20 times the frame period T. The first overlap period OV11 may be set in various ways. That is, the first overlap period OV21 may be the first overlap period OV21 from the time when the second block image for the left eye is completed in the second display block DB2 of the first emission period OP21 according to the liquid crystal response speed. Various settings may be made within a time point at which the emission period OP21 ends.

The third light emission control signal BLC3 has a third light emission period OP23, and the third light emission period OP23 defines a second overlapping period OV12 overlapping with a later stage of the second light emission period OP22. Have The second overlap period OV12 may be about 1/20 times the frame period T. The second overlap period OV12 may be set in various ways. That is, the second overlap period OV12 is the second overlap image from the time when the third block image for the left eye is completed in the third display block DB3 of the second emission period OP22 according to the liquid crystal response speed. Various settings may be made within the time point at which the emission period OP22 ends.

The fourth light emission control signal BLC4 has a fourth light emission period OP24, and the fourth light emission period OP24 has a third overlapping period OV13 overlapping with a later stage of the third light emission period OP23. Have The third overlap period OV13 may be about 1/20 times the frame period T. The third overlap period OV13 may be set in various ways. That is, the third overlapping section OV13 may be configured to be generated when the fourth block image for the left eye is completed in the fourth display block DB4 of the third light emitting section OP23 according to the liquid crystal response speed. Various settings may be made within the time point at which the emission period OP23 ends. In addition, the first, second and third overlapping periods OV11, OV12, and OV13 may be set differently.

As shown, the light source 450 repeats the operation in the frame period T with a delay difference Dt with respect to a start point of the N-th frame F (N). The operation period of the light source unit 450 may include a sequential on period corresponding to about 17T / 20 sections in which the first, second, third, and fourth light emitting blocks 450a, 450b, 450c, and 450d emit light sequentially. SQ_ON3 and corresponding to about 3T / 20 sections before the first light emitting block 450a emits light by the first, second, and third overlapping sections OV21, OV22, and OV23. The second, third, and fourth light emitting blocks 450a, 450b, 450c, and 450d may have a total off period ALL_OFF3.

The liquid crystal response speed (SLC_RS) of the left eye shutter 610 and the right eye shutter 620 is started by opening and closing operations of the left eye shutter 610 and the right eye shutter 620 within the all off period ALL_OFF3. ), The liquid crystal margin time can be secured. The all off period ALL_OFF3 may be longer than the liquid crystal response speed of the shutter glasses 600. Accordingly, 3D crosstalk may be prevented by completely opening and closing (or closing and opening) the left eye shutter 610 and the right eye shutter 620 in a section in which the left eye image (or right eye image) is substantially maintained.

Accordingly, crosstalk between the left eye image and the right eye image due to the liquid crystal response speed SLC_RS of the shutter glasses 600 may be prevented. In addition, according to the present exemplary embodiment, since the emission period is longer than that of the first and second embodiments, the luminance characteristic of the display device may be improved.

5 are timing diagrams of driving signals for explaining a 3D image display method according to Embodiment 4 of the present invention.

1 and 5, as described with reference to FIG. 2, the panel driver 200 may include left-eye data frames LI1 and LI2, which are arranged on the display panel 100 during the Nth frame F (N). LI3 and LI4 are output, and the right eye data frames RI1, RI2, RI3, and RI4 are output to the display panel 100 during the N + 1th frame F (N + 1).

The light source driver 500 controls first, second, third, and fourth light emission to drive the light source 450, that is, the first to fourth light emitting blocks 450a, 450b, 450c, and 450d. Generate signals BLC1, BLC2, BLC3, BLC4.

The first light emitting block 450a emits and turns off in response to the first light emission control signal BLC1. The first emission control signal BLC1 has a first emission period OP11, and the first emission period OP11 has an Nth frame F (N) according to the liquid crystal response speed of the display panel 100. It starts from the point where the set time Rt elapsed from the start point of. The set time Rt may be about 3/4 times the frame period T. The first emission period OP11 may correspond to about 1/5 times the frame period T.

As shown in the drawing, the first light emitting block 450a emits light in response to the first light emitting control signal BLC1 being output from the last line data of the third data block LI3 for the left eye. Light is emitted during the section OP11. In the first emission period OP11, the first display block DB1 completes a left eye first block image corresponding to the left eye first data block LI1. As a result, the first light emitting block 450a emits light in a section in which the first block image for the left eye is completed and maintained in the first display block DB1.

The second light emitting block 450b emits and turns off in response to the second light emission control signal BLC2. The second emission control signal BLC2 has a second emission period OP12, and the second emission period OP12 defines a first overlapping period OV11 that overlaps with a later stage of the first emission period OP11. Have The first overlap period OV11 may be about 1/20 times the frame period T. The second light emitting block 450b is turned on at a later stage of the first light emitting period OP11 corresponding to the first overlapping period OV11 in response to the second light emission control signal BLC2, and thus the second light emitting block 450b is turned on. Light is emitted during the light emission period OP12. The second emission period OP12 may be about 1/5 times the frame period T. In the second emission period OP12, the second display block DB2 completes a second left eye image corresponding to the second left eye data block LI2. Accordingly, the second light emitting block 450b emits light in a section in which the second block image for the left eye is completed and maintained in the second display block DB2.

The first overlap period OV11 may be set in various ways. That is, the first overlapping period OV11 may be determined based on the liquid crystal response speed from the time when the second block image for the left eye is completed in the second display block DB2 of the first emission period OP11. Various settings may be made within the time point at which the emission period OP11 ends.

The third light emitting block 450c emits light and turns off in response to the third light emission control signal BLC3. The third emission control signal BLC3 has a third emission period OP13, and the third emission period OP13 starts after an interval A1 has elapsed from an end point of the second emission period OP12. do. The separation section A1 may be about 1/10 times the frame period T. The third light emitting block 450c emits light during the third light emitting period OP13 after the separation period A1 in response to the third light emission control signal BLC3. That is, the light source 450 does not emit light in the separation section A1 as a whole. The third emission period OP13 may be about 1/5 times the frame period T. In the third emission period OP13, the third display block DB3 completes a left eye third block image corresponding to the third left eye data block LI3. Accordingly, the third light emitting block 450c emits light in a section in which the third block image for the left eye is completed and maintained in the third display block DB3.

The fourth light emitting block 450d emits and turns off in response to the fourth light emission control signal BLC4. The fourth light emission control signal BLC4 has a fourth light emission period OP14, and the fourth light emission period OP14 defines a second overlapping period OV12 overlapping with a later stage of the third light emission period OP13. Have The second overlap period OV12 may be about 1/20 times the frame period T. The fourth light emitting block 450d is turned on later in the third light emitting period OP13 corresponding to the second overlapping period OV12 in response to the fourth light emitting control signal BLC4 and is turned on. Light is emitted during the light emission section OP14. The fourth emission period OP14 may be about 1/5 times the frame period T. In the fourth emission period OP14, the fourth display block DB4 completes a left eye fourth block image corresponding to the left eye fourth data block LI4. Accordingly, the fourth light emitting block 450d emits light in a section in which the left eye fourth block image is completed and maintained in the fourth display block DB4.

The separation section A1 considers a section in which the third block image for the left eye is maintained in the third display block DB3 according to the liquid crystal response speed and the first and second overlapping sections OV11 and OV12. It can be set in various ways. The first and second overlapping periods OV11 and OV12 may be set differently.

As shown, the light source 450 repeats the operation in the frame period T with a delay difference Dt with respect to a start point of the N-th frame F (N). The operation period of the light source unit 450 has a sequential on period SQ_ON4 and an overall off period ALL_OFF.

During the sequential on period SQ_ON4 corresponding to about 4T / 5 sections, the second light emitting block 450b overlaps with the first light emitting block 450a and sequentially emits light corresponding to the first overlapping section OV11. In addition, the third light emitting block 450c emits light after the separation section A1, and the fourth light emitting block 450d corresponds to the second overlapping section OV12 to correspond to the third light emitting block 450c. Superimposed on and emits light sequentially. The first, second, third, and fourth light emitting blocks 450a, 450b, and 450c during the all off period ALL_OFF4 corresponding to a period T / 5 before the first light emitting block 450a emits light. , 450d) are all extinguished.

The liquid crystal response speed (SLC_RS) of the left eye shutter 610 and the right eye shutter 620 is started by opening and closing operations of the left eye shutter 610 and the right eye shutter 620 within the all off period ALL_OFF4. ), The liquid crystal margin time can be secured. The all off period ALL_OFF4 may be longer than the liquid crystal response speed of the shutter glasses 600. Accordingly, 3D crosstalk may be prevented by completely opening and closing (or closing and opening) the left eye shutter 610 and the right eye shutter 620 in a section in which the left eye image (or right eye image) is substantially maintained.

According to the present embodiment, 3D crosstalk and luminance nonuniformity can be improved by light leaking from neighboring light emitting blocks. For example, when the second light emitting block 450b emits light, the second light emitting block 450b provides light to the second display block DB2 and is adjacent to the second display block DB2. Leakage light of the second light emitting block 450b is provided to the first and third display blocks DB1 and DB3. Therefore, 3D crosstalk displayed on the first and third display blocks DB1 and DB3 can be viewed, and the first and third display blocks DB1 and DB3 are relatively displayed on the second display. It may have a higher luminance than the block DB2. According to the present exemplary embodiment, by providing the separation section A1 that turns off all the light emitting blocks in the middle section of the section in which the light emitting blocks sequentially emit light, 3D crosstalk and luminance nonuniformity due to leaked light may be improved. Can be.

6 are timing diagrams of driving signals for explaining a 3D image display method according to a fifth embodiment of the present invention.

1 and 6, as described with reference to FIG. 2, the panel driver 200 may include left-eye data frames LI1 and LI2, which are arranged on the display panel 100 during the Nth frame F (N). LI3 and LI4 are output, and the right eye data frames RI1, RI2, RI3, and RI4 are output to the display panel 100 during the N + 1th frame F (N + 1).

The light source driver 500 controls first, second, third, and fourth light emission to drive the light source 450, that is, the first to fourth light emitting blocks 450a, 450b, 450c, and 450d. Generate signals BLC1, BLC2, BLC3, BLC4.

The first emission control signal BLC1 has a first emission period OP11, and the first emission period OP11 has an Nth frame F (N) according to the liquid crystal response speed of the display panel 100. It starts from the point where the set time Rt elapsed from the start point of. The set time Rt may be about 3/4 times the frame period T. The first emission period OP11 may correspond to about 1/5 times the frame period T.

The second light emission control signal BLC2 has a second light emission period OP12, and the second light emission period OP12 has a first overlapping period OV21 overlapping with a later stage of the first light emission period OP11. . The first overlap period OV21 may be longer than the first overlap period OV11 of the fourth embodiment. For example, the first overlap period OV21 may be about 1/10 times the frame period T.

The third emission control signal 450c has a third emission period OP13 spaced apart from the second emission period OP12 by the separation period A2. The spacing section A2 may be longer than the spacing section A1 of the fourth embodiment. For example, the separation section A2 may be about 1/5 times the frame period T.

The fourth light emission control signal BLC4 has a fourth light emission period OP14, and the fourth light emission period OP14 has a second overlapping period OV22 overlapping with a later stage of the third light emission period OP13. . The second overlap period OV22 may be longer than the second overlap period OV12 of the fourth embodiment. For example, the second overlapping period OV22 may be 1/2 of the third light emitting period OP13.

As described above, the separation section A2 may be increased by lengthening the first and second overlapping sections OV21 and OV22. The separation section A2 considers a section in which the third block image for the left eye is maintained in the third display block DB3 according to the liquid crystal response speed and the first and second overlapping sections OV21 and OV22. It can be set in various ways.

As shown, the light source 450 repeats the operation in the frame period T with a delay difference Dt with respect to a start point of the N-th frame F (N). The operation period of the light source unit 450 has a sequential on period SQ_ON5 and a total off period ALL_OFF5. During the sequential on period SQ_ON5 corresponding to about 4T / 5 sections, the second light emitting block 450b overlaps with the first light emitting block 450a in order to sequentially correspond to the first overlapping section OV21. Emits light, the third light emitting block 450c emits light after the separation section A2, and the fourth light emitting block 450d corresponds to the second overlapping section OV22. ) And emit light sequentially. The first, second, third and fourth light emitting blocks 450a, 450b, and 450c during the all off period ALL_OFF5 corresponding to a period T / 5 before the first light emitting block 450a emits light. , 450d) are all extinguished.

The left-eye shutter 610 and the right-eye shutter 620 are opened and closed within the all off period ALL_OFF5, and according to the liquid crystal response speed SLC_RS of the left-eye shutter 610 and the right-eye shutter 620. Liquid crystal drive time can be secured. The all off period ALL_OFF5 may be longer than the liquid crystal response speed of the shutter glasses 600. The left eye through the shutter glasses 600 in a section in which the left eye image is substantially maintained by completely opening the left eye shutter 610 and completely closing the right eye shutter 620 within the all off period ALL_OFF5. You can recognize the video.

Compared to the present embodiment and the fourth embodiment described above, the separation section A2 is long by using the first and second overlapping sections OV21 and OV22, so that the light leaked from the neighboring light emitting blocks 3D crosstalk and luminance non-uniformity can be improved more effectively. On the other hand, since the emission period of each light emitting block is the same, the overall luminance of the display device may be substantially the same.

7 is a graph illustrating crosstalk values according to embodiments of the present invention.

2 to 7, the first, second, third and fourth display blocks DB1, DB2, DB3, and DB4 of the display panel 100 may correspond to the first, second, third, and fourth display blocks. The 3D crosstalk value at the fourth measuring points 1, 2, 3, 4 was measured.

First, according to the stereoscopic image display method according to the first embodiment described in FIG. 2, the 3D crosstalk value of the third measurement point 3 is the smallest, and then the second, first and fourth measurement points 2 , 1, 4) in order to increase the 3D crosstalk value. Although the 3D crosstalk values of the first, second, third and fourth measurement points 1, 2, 3, and 4 were slightly different, they were all at or near the allowable values.

According to the stereoscopic image display method according to the second embodiment described in FIG. 3, the 3D crosstalk value of the second measurement point 2 is the smallest, and the first, third and fourth measurement points 1, 3 are as follows. , 4) 3D crosstalk increased in order. Although the 3D crosstalk value of the fourth measuring point is somewhat large, the 3D crosstalk values of the other first, second and third measuring points 1, 2 and 3 are all smaller than or close to the allowable values. It was.

According to the stereoscopic image display method according to the fourth embodiment described with reference to FIG. 5, the 3D crosstalk value of the third measurement point 3 is the smallest, and the first, second and fourth measurement points 1, 2, 4) 3D crosstalk value increased in order. Although the 3D crosstalk values of the first, second, third and fourth measurement points 1, 2, 3, and 4 were slightly different, they were all smaller than or close to the allowable values.

According to the stereoscopic image display method according to the fifth embodiment described with reference to FIG. 6, the 3D crosstalk value of the third measurement point 3 is the smallest, and the first, fourth and second measurement points 1, 4, 2) 3D crosstalk value increased in order. Although the 3D crosstalk values of the first, second, third and fourth measurement points 1, 2, 3, and 4 were slightly different, they were all smaller than or close to the allowable values.

As such, it can be seen that the 3D crosstalk value of the display device according to example embodiments has good characteristics.

8 are timing diagrams of driving signals for explaining a 3D image display method according to a sixth embodiment of the present invention.

1 and 8, as described with reference to FIG. 2, the panel driver 200 may include left-eye data frames LI1, LI2, and the left eye data frame on the display panel 100 during the Nth frame F (N). LI3 and LI4 are output, and the right eye data frames RI1, RI2, RI3, and RI4 are output to the display panel 100 during the N + 1th frame F (N + 1).

The light source driver 500 controls first, second, third, and fourth light emission to drive the light source 450, that is, the first to fourth light emitting blocks 450a, 450b, 450c, and 450d. Generate signals BLC1, BLC2, BLC3, BLC4.

The first light emitting block 450a emits and turns off in response to the first light emission control signal BLC1. The first light emission control signal BLC1 has a first light emission period OP31, and the first light emission period OP31 has respect to a start point of the Nth frame F (N) of the display panel 100. It starts from the time point which the said setting time Rt passed. The set time Rt may be about 3/4 of the frame period T. The first emission period OP31 may be about 1/5 times the frame period T.

As shown in the drawing, the first light emitting block 450a is configured to respond to the first light emitting control signal BLC1 and the first light emitting block 450a starts from the completion of output of the last line data of the third left eye data block LI3. Light is emitted during one light emission section OP31. In the first emission period OP31, the first display block DB1 completes a left eye first block image corresponding to the left eye first data block LI1. As a result, the first light emitting block 450a emits light in a section in which the first block image for the left eye is completed and maintained in the first display block DB1.

The second light emitting block 450b emits and turns off in response to the second light emission control signal BLC2. The second emission control signal BLC2 has a second emission period OP32, and the second emission period OP32 is located after the end of the first emission period OP31. The second light emitting block 450b emits light during the second light emitting period OP32 in response to the second light emission control signal BLC2. The second emission period OP32 may be about 3/20 times the frame period T. In the second emission period OP32, the second display block DB2 completes a second left eye image corresponding to the second left eye data block LI2. Accordingly, the second light emitting block 450b emits light in a section in which the second block image for the left eye is completed and maintained in the second display block DB2.

The third light emitting block 450c emits light and turns off in response to the third light emission control signal BLC3. The third emission control signal BLC3 has a third emission period OP33, and the third emission period OP33 starts after a distance A3 elapses from an end point of the second emission period OP32. do. The separation section A3 may be 1/10 times the frame period T. The third light emitting block 450c emits light during the third light emitting period OP33 after the separation period A3 in response to the third light emission control signal BLC3. That is, the light source 450 does not generate light during the separation section A3. The third emission period OP33 may be about 1/5 times the frame period T. In the third emission period OP33, the third display block DB3 completes a left eye third block image corresponding to the third left eye data block LI3. Accordingly, the third light emitting block 450c emits light in a section in which the third block image for the left eye is completed and maintained in the third display block DB3.

The fourth light emitting block 450d emits and turns off in response to the fourth light emission control signal BLC4. The fourth emission control signal BLC4 has a fourth emission period OP34, and the fourth emission period OP34 is positioned after an end point of the third emission period OP33. The fourth light emitting block 450d emits light during the fourth light emitting period OP34 in response to the fourth light emission control signal BLC4. The fourth emission period OP34 may be about 3/20 times the frame period T. In the fourth emission period OP34, the fourth display block DB4 completes a left eye fourth block image corresponding to the left eye fourth data block LI4. Accordingly, the fourth light emitting block 450d emits light in a section in which the left eye fourth block image is completed and maintained in the fourth display block DB4.

The separation section A3 may be set in various ways in consideration of a section in which the third block image for the left eye is maintained in the third display block DB3 according to the liquid crystal response speed.

As shown, the light source 450 repeats the operation in the frame period T with a delay difference Dt with respect to a start point of the N-th frame F (N). The operation period of the light source unit 450 has a sequential on period SQ_ON6 and a total off period ALL_OFF6. During the sequential on period SQ_ON6 corresponding to about 4T / 5 sections, the first and second light emitting blocks 450a and 450b emit light sequentially and the third and fourth light emitting blocks 450c and 450d. ) Emits light sequentially after the separation period A3. In addition, the first, second, third and fourth light emitting blocks 450a and 450b during the entire off period ALL_OFF6 corresponding to about T / 5 before the first light emitting block 450a emits light. , 450c, and 450d are all turned off.

The liquid crystal response speed (SLC_RS) of the left eye shutter 610 and the right eye shutter 620 is started by opening and closing operations of the left eye shutter 610 and the right eye shutter 620 within the all off period ALL_OFF6. ), The liquid crystal margin time can be secured. The all off period ALL_OFF6 may be longer than the liquid crystal response speed of the shutter glasses 600. Accordingly, 3D crosstalk may be prevented by completely opening and closing (or closing and opening) the left eye shutter 610 and the right eye shutter 620 in a section in which the left eye image (or right eye image) is substantially maintained.

In addition, in consideration of the characteristic that the polling time is longer than the rising time according to the liquid crystal response speed of the shutter glasses 600, the rising time of the left eye shutter signal LSS is higher than that of the right eye shutter signal RSS. Implementing first may reduce the driving delay time of the shutter glasses 600. Therefore, the open period OPP of each of the left and right eye shutter signals LSS and RSS may be longer than the closing period CLP.

Accordingly, crosstalk between the left eye image and the right eye image due to the liquid crystal response speed SLC_RS of the shutter glasses 600 may be prevented. In addition, by providing the separation section A1 that turns off all of the light emitting blocks in a middle section of the light emitting blocks that sequentially emit light, 3D crosstalk and luminance nonuniformity due to leaked light may be improved.

9 are timing diagrams of driving signals for explaining a 3D image display method according to a seventh embodiment of the present invention.

1 and 9, as described with reference to FIG. 2, the panel driver 200 may include left-eye data frames LI1, LI2, and the left eye data frame on the display panel 100 during the Nth frame F (N). LI3 and LI4 are output, and the right eye data frames RI1, RI2, RI3, and RI4 are output to the display panel 100 during the N + 1th frame F (N + 1).

The light source driver 500 controls first, second, third, and fourth light emission to drive the light source 450, that is, the first to fourth light emitting blocks 450a, 450b, 450c, and 450d. Generate signals BLC1, BLC2, BLC3, BLC4.

The first light emitting block 450a emits and turns off in response to the first light emission control signal BLC1. The first light emission control signal BLC1 has a first light emission period OP31, and the first light emission period OP31 has respect to a start point of the Nth frame F (N) of the display panel 100. It starts from the time point which the said setting time Rt passed. The set time Rt may be 3/4 times the frame period T. The first emission period OP31 may be 1/5 times the frame period T.

The second light emitting block 450b emits and turns off in response to the second light emission control signal BLC2. The second emission control signal BLC2 has a second emission period OP32, and the second emission period OP32 has elapsed by a first separation period A41 from an end point of the first emission period OP31. Then begins. The first separation section A41 may be 1/20 times the frame period T. The second emission period OP32 may be about 3/20 times the frame period T.

The third light emitting block 450c emits light and turns off in response to the third light emission control signal BLC3. The third light emission control signal BLC3 has a third light emission period OP33, and the third light emission period OP33 is positioned after an end point of the second light emission period OP32. The third emission period OP33 may be about 3/20 times the frame period T.

The fourth light emitting block 450d emits and turns off in response to the fourth light emission control signal BLC4. The fourth light emission control signal BLC4 has a fourth light emission period OP34, and the fourth light emission period OP34 has elapsed by a second separation period A42 from an end point of the third light emission period OP33. Then begins. The second separation section A42 may be 1/20 times the frame period T. The fourth emission period OP34 may be about 1/5 times the frame period T.

The first separation section A41 may be variously set in consideration of a section in which the second block image for the left eye is maintained in the second display block DB2 according to the liquid crystal response speed. The second separation section A42 may be variously set in consideration of a section in which the second block image for the left eye is maintained in the fourth display block DB4 according to the liquid crystal response speed.

As shown, the light source 450 repeats the operation in the frame period T with a delay difference Dt with respect to a start point of the N-th frame F (N). The operation period of the light source unit 450 has a sequential on period SQ_ON7 and a total off period ALL_OFF7. During the sequential on period SQ_ON7 corresponding to about 4/5, the second light emitting block 450b emits light after the first light emitting block 450a emits light after the first spacing period A41, and The third light emitting block 450c emits light immediately after the second light emitting block 450b, and the fourth light emitting block 450d emits light by the third light emitting block 450c and after the second separation section A42. To emit light. Luminance non-uniformity caused by leakage light of neighboring light emitting blocks may be improved by the first and second separation periods A41 and 42.

In addition, the first, second, third and fourth light emitting blocks 450a, 450b, during the entire off period ALL_OFF7 corresponding to about T / 5 before the first light emitting block 450a emits light. 450c and 450d) are both turned off.

The liquid crystal response speed (SLC_RS) of the left eye shutter 610 and the right eye shutter 620 is started by opening and closing operations of the left eye shutter 610 and the right eye shutter 620 within the all off period ALL_OFF7. ), The liquid crystal margin time can be secured. The all off period ALL_OFF7 may be longer than the liquid crystal response speed of the shutter glasses 600. Accordingly, 3D crosstalk may be prevented by completely opening and closing (or closing and opening) the left eye shutter 610 and the right eye shutter 620 in a section in which the left eye image (or right eye image) is substantially maintained.

Accordingly, crosstalk between the left eye image and the right eye image due to the liquid crystal response speed SLC_RS of the shutter glasses 600 may be prevented. In addition, by providing the first and second separation sections A41 and A42 between the light emitting sections, 3D crosstalk and luminance nonuniformity may be improved by light leaked from a neighboring light emitting block.

10 are timing diagrams of driving signals for explaining a 3D image display method according to Embodiment 8 of the present invention.

1 and 10, as described with reference to FIG. 2, the panel driver 200 may include left-eye data frames LI1, LI2, and the left eye data frame on the display panel 100 during the Nth frame F (N). LI3 and LI4 are output, and the right eye data frames RI1, RI2, RI3, and RI4 are output to the display panel 100 during the N + 1th frame F (N + 1).

The light source driver 500 controls first, second, third, and fourth light emission to drive the light source 450, that is, the first to fourth light emitting blocks 450a, 450b, 450c, and 450d. Generate signals BLC1, BLC2, BLC3, BLC4.

The first light emitting block 450a emits and turns off in response to the first light emission control signal BLC1. The first light emission control signal BLC1 has a first light emission period OP31, and the first light emission period OP31 has respect to a start point of the Nth frame F (N) of the display panel 100. It starts from the time point which the said setting time Rt passed. The set time Rt may be 3/4 times the frame period T. The first emission period OP31 may be about 1/5 times the frame period T.

The second light emitting block 450b emits and turns off in response to the second light emission control signal BLC2. The second emission control signal BLC2 has a second emission period OP32, and the second emission period OP32 defines a first overlapping period OV31 that overlaps with a later stage of the first emission period OP31. Have The first overlap period OV31 may be about 1/20 times the frame period T. The second emission period OP32 may be 3/20 times the frame period T.

The third light emitting block 450c emits light and turns off in response to the third light emission control signal BLC3. The third emission control signal BLC3 has a third emission period OP33, and the third emission period OP33 starts after an interval A5 has elapsed from an end point of the second emission period OP32. do. The separation section A5 may be 1/5 times the frame period T. The third emission period OP33 may be about 3/20 times the frame period T.

The fourth light emitting block 450d emits and turns off in response to the fourth light emission control signal BLC4. The fourth light emission control signal BLC4 has a fourth light emission period OP34, and the fourth light emission period OP34 defines a second overlapping period OV32 overlapping with a later stage of the third light emission period OP33. Have The second overlap period OV32 may be about 1/20 times the frame period T. The fourth emission period OP34 may be 1/5 times the frame period T.

The separation section A5 considers a section in which the third block image for the left eye is maintained in the third display block DB3 according to the liquid crystal response speed and the first and second overlapping sections OV31 and OV32. It can be set in various ways.

As shown, the light source 450 repeats the operation in the frame period T with a delay difference Dt with respect to a start point of the N-th frame F (N). The operation period of the light source unit 450 has a sequential on period SQ_ON8 and a total off period ALL_OFF8. During the sequential on period SQ_ON8 corresponding to about 4/5 periods, the second light emitting block 450b overlaps with the first light emitting block 450a corresponding to the first overlapping period OV31 and sequentially emits light. The third light emitting block 450c emits light after the second light emitting block 450b emits light after the separation period A5, and the fourth light emitting block 450d includes the second overlapping period OV32. Corresponding to the third light emitting block 450c and emitting light sequentially.

The first, second, third, and fourth light emitting blocks 450a, 450b, and 450c during the all off period ALL_OFF8 corresponding to about T / 5 before the first light emitting block 450a emits light. , 450d) are all extinguished.

The left eye shutter 610 and the right eye shutter 620 are opened and closed within the all off period ALL_OFF8 so that the liquid crystal response speed SLC_RS of the left eye shutter 610 and the right eye shutter 620 may be changed. Liquid crystal drive time can be secured. The all off period ALL_OFF8 may be longer than the liquid crystal response speed of the shutter glasses 600. The left eye through the shutter glasses 600 in a section in which the left eye image is substantially maintained by completely opening the left eye shutter 610 and completely closing the right eye shutter 620 within the all off period ALL_OFF4. You can recognize the video.

Accordingly, crosstalk between the left eye image and the right eye image due to the liquid crystal response speed SLC_RS of the shutter glasses 600 may be prevented. In addition, by using the first and second overlapping sections OV31 and OV32, the separation section A5 is long, thereby effectively improving 3D crosstalk and luminance non-uniformity caused by light leaked from a neighboring light emitting block. Can be.

In the above embodiments, the 3D image is divided into a left eye image and a right eye image and displayed at 120 Hz. However, the 3D image is divided into a plurality of images for the left eye and a plurality of images for the right eye. A three-dimensional image can be displayed at the above frequency. In addition, a 3D image may be displayed at a frequency of 120 Hz or more by inserting a black image between the left eye image and the right eye image. The black image may be inserted in at least one frame section. As described above, when the 3D image is displayed at a frequency of 120 Hz or more, each of the open section and the close section of the shutter glasses may have a length corresponding to a plurality of frames in which the left eye image or the right eye image is displayed.

Although described with reference to the embodiments above, those skilled in the art will understand that the present invention can be variously modified and changed without departing from the spirit and scope of the invention as set forth in the claims below. Could be.

100: display panel 200: panel driver
210: gate driver 230: data driver
300: timing control unit 400: light source supply unit
410: light guide plate 450: light source
500: light source driving unit

Claims (15)

Outputs data corresponding to a left-eye or right-eye image to a display panel in which the first to k-th display blocks are defined by the first to k-th (k is natural numbers) light emitting blocks arranged according to the scanning direction in which the image is displayed. Doing;
Turning off all of the first to kth light emitting blocks in an entire off period of a frame period;
Sequentially emitting light of the first to kth light emitting blocks in a sequentially on section after the entire off section of the frame section; And
And opening and closing operations of the left eye shutter and the right eye shutter included in the shutter glasses in response to the left eye or right eye image displayed on the display panel within the entire off period. The method of claim 1, wherein sequentially emitting the first to kth light emitting blocks comprises:
At least one of the first to k-th light emitting blocks has a light emitting section having a different length. The method of claim 1, further comprising sequentially emitting the first to kth light emitting blocks,
And the first to k-th light emitting blocks have light emission sections having the same length as each other. The method of claim 1, further comprising sequentially emitting the first to kth light emitting blocks,
At least one of the first to k-th light emitting blocks has an overlapping section overlapping the light emitting section of the previous light emitting block. The stereoscopic image display method according to claim 4, wherein the overlapping sections included in each light emitting section have the same length. The stereoscopic image display method according to claim 4, wherein the overlapping sections included in each light emitting section have different lengths. The method of claim 1, further comprising sequentially emitting the first to kth light emitting blocks,
At least one of the first to k-th light emitting blocks has a light emitting section spaced apart from a light emitting section and a spaced section of a previous light emitting block. The stereoscopic image display method of claim 7, wherein the spaced intervals in the sequentially on periods have the same length. The stereoscopic image display method of claim 7, wherein the spaced intervals in the sequentially on periods have different lengths. The light emitting device of claim 1, wherein the first light emitting block among the first to kth light emitting blocks emits light during the first light emitting period after a preset set time from the time when the first line data of the first display block is output. Stereoscopic image display method. The stereoscopic image display method of claim 10, wherein the set time is longer than a liquid crystal response speed of the display panel. The stereoscopic image display method according to claim 10, wherein the set time is a time taken for outputting from the first line data of the first display block to the last line data of the k-1th display block. The stereoscopic image display method of claim 1, wherein the entire off period is longer than a liquid crystal response speed of the shutter glasses. The method of claim 13, wherein the opening and closing operations of the left eye shutter and the right eye shutter are started.
First opening one shutter corresponding to an image displayed on the display panel among the left eye shutter and the right eye shutter; And
Thereafter, closing the other one of the shutter for the left eye and the shutter for the right eye. The stereoscopic image display method of claim 14, wherein the open section of the shutter of the shutter glasses is longer than the closed section of the shutter.

Images