KR101322031B1 - Flat panel display controllable viewing angle and multi-view - Google Patents

Abstract

A flat panel display device capable of performing both a wide / narrow viewing angle function and a dual view / multi view function is provided. In a flat panel display device, a plurality of pixels are arranged in a matrix form, a display panel in which adjacent first pixels, second pixels, and third pixels form one group pixel among the plurality of pixels is disposed on an upper portion of the display panel, and the group pixels Signals applied to the passive barrier formed in the partial region of the light transmittance and the blocking portion located in the remaining region of the group pixel to shield the light, the first pixel constituting the display panel, the second pixel and the third pixel The control unit includes a driver for selectively driving the view control mode and the view control mode.

Flat Panel Display, Viewing Angle, Dual View, Multi View

Description

Flat panel display controllable viewing angle and multi-view

1 is a schematic block diagram of a flat panel display device according to a first embodiment of the present invention.

2 is a diagram when the display panel according to the first embodiment of the present invention operates in the field of view control mode.

3 is a diagram when the display panel of FIG. 2 operates in the view control mode.

4 is a plan view of a display panel according to a first exemplary embodiment of the present invention.

5 is a cross-sectional view of a display panel according to a second embodiment of the present invention.

6 is a plan view of a display panel according to a second exemplary embodiment of the present invention.

7 is a cross-sectional view when the display panel according to the third exemplary embodiment of the present invention operates in the visual field control mode.

8 is a cross-sectional view when the display panel according to the third exemplary embodiment of the present invention operates in the view control mode.

DESCRIPTION OF THE REFERENCE NUMERALS (S)

100: display panel 110: passive barrier

200, 400: driver 300: backlight assembly

310: active barrier

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat panel display, and more particularly, to a flat panel display capable of varying viewing angle characteristics.

Recently, with the rapid progress of semiconductor technology, the demand for flat panel display devices suitable for a new environment is rapidly increasing in accordance with the trend of lowering and lowering power of various electronic devices and miniaturization, thinning, and lightening of electronic devices. Accordingly, flat panel display devices such as a liquid crystal display (LCD), a plasma display panel (PDP), an organic electroluminescence display (OELD), and the like are being developed.

In addition, as the usage range of the flat panel display device becomes wider, a wide / narrow viewing angle structure that can be driven in a wide viewing angle mode for security or privacy protection, and can be switched to a narrow viewing angle mode in which a screen cannot be checked in terms of necessity, and Dual view structures are being introduced to expand the range of applications by simultaneously displaying different screens.

However, in the related art, a wide / narrow viewing angle structure or a dual view structure is generally divided into independent flat display devices, and thus it is difficult to simultaneously satisfy a security maintenance function and a function of providing a different screen in different directions.

In particular, in the mobile field such as personal digital assistants (PDAs) or mobile phones, there is a growing demand for a general-purpose flat panel display device that can use a security function when moving and a dual view function when mounted.

Accordingly, an aspect of the present invention is to provide a general-purpose flat panel display device that can include a wide / narrow viewing angle function for blocking a screen from a side and a dual view function for displaying different screens according to a viewing angle direction.

Another object of the present invention is to provide a flat panel display which can efficiently implement a wide / narrow viewing angle function and a dual view function by combining a barrier having proper structure and whether signal processing is performed.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the precise forms disclosed. Other objects, which will be apparent to those skilled in the art, It will be possible.

In the flat panel display according to an aspect of the present invention for achieving the above technical problem, a plurality of pixels are arranged in a matrix form, and adjacent first, second, and third pixels of the plurality of pixels are one group pixel. A passive barrier disposed on an upper portion of the display panel, the passivation barrier disposed on a portion of the group pixel, the opening configured to transmit light, and a blocking portion disposed on the remaining region of the group pixel to shield the light; And a driving unit configured to selectively drive a view control mode and a view control mode by controlling signals applied to the first pixel, the second pixel, and the third pixel of the display panel.

A flat panel display device according to another aspect of the present invention is a display in which a plurality of color pixels are arranged in a matrix form, wherein a left color pixel, a reference color pixel, and a right color pixel adjacent in a horizontal direction among the plurality of color pixels form one pixel. A passive barrier disposed above the display panel and having an opening positioned on the reference color pixel to transmit light, and a blocking portion disposed on the left and right color pixels to shield the light; And a driver configured to selectively control a signal applied to the reference color pixel, the left color pixel, and the right color pixel constituting the display panel to selectively drive a view control mode and a view control mode.

According to another aspect of the present invention, there is provided a flat panel display including a plurality of pixels arranged in a matrix, and a first pixel, a second pixel, and a third pixel adjacent in a horizontal direction among the plurality of pixels forming one group pixel. An active barrier disposed above the display panel and having an opening in a transparent state for transmitting light and an opaque blocking portion for shielding light, wherein the active barrier has a transparent and opaque state in which the opening and the blocking portion are varied; And a driver configured to control a transparent state and an opaque state of the active barrier for each position, and selectively drive a view control mode and a view control mode by controlling a signal applied to the group pixels constituting the display panel.

The details of other embodiments are included in the detailed description and drawings. Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. Like reference numerals refer to like elements throughout.

Hereinafter, a flat panel display device according to embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic configuration diagram of a flat panel display according to a first exemplary embodiment of the present invention, illustrating a case of a liquid crystal display among flat panel displays.

Referring to FIG. 1, a flat panel display device according to a first exemplary embodiment may include a display panel 100 for displaying an image, a driver 200 for driving the display panel 100, and a display panel 100. And a backlight assembly 300 for supplying light and an inverter 310 for driving the backlight assembly 300.

The display panel 100 includes a plurality of pixels P in which regions are divided by gate lines GL and data lines DL that cross each other.

The plurality of pixels P constituting the display panel 100 are arranged in a matrix form forming a row and a column, and each pixel P is a red, green, and blue color pixel for displaying color. (R, G, B), and three pixels P adjacent in the horizontal direction are gathered to form one group pixel GP.

Although not shown, a thin film transistor TFT having a gate electrode, an active layer, a source electrode, and a drain electrode is disposed at an intersection of the gate line GL and the data line DL. Each pixel P is filled with a liquid crystal material equivalent to the liquid crystal cell Clc, and a storage capacitor Cst is formed to maintain a constant voltage charged in the liquid crystal cell Clc.

The display panel 100 displays an image in each pixel P according to a scan signal sequentially supplied to the gate line GL and an image signal supplied through the data line DL.

The thin film transistor TFT provided in each pixel P is turned on when the scan signal is supplied from the gate line GL to charge the liquid crystal cell Clc with the image signal received through the data line DL. The image signal charged in the liquid crystal cell Clc of each pixel P is maintained by the storage capacitor Cst for one frame period.

The passive barrier 110 disposed above the display panel 100 includes an opening 111 and a blocking unit 112. The opening 111 of the passive barrier 110 is positioned in a portion of the group pixel GP to transmit light, and the blocking unit 112 is positioned in the remaining region of the group pixel GP to shield the light.

In FIG. 1, the opening 111 of the passive barrier 110 is disposed in an area corresponding to one pixel P of the group pixels GP, and the group pixel is alternately arranged with the opening 111. The case where the positions of the openings 111 and the blocking portions 112 are shifted by a predetermined interval for each horizontal line SL is disposed in an area corresponding to the remaining pixels P of the GP.

Here, the horizontal line SL is composed of a plurality of pixels P or color pixels R, G, and B arranged adjacent to each other in the horizontal direction.

However, the present invention is not limited thereto, and the passive barrier 110 may be implemented in various forms according to various matters such as the narrow viewing angle or the wide viewing angle, the distance between the passive barrier 110 and the pixel P, and the like. .

For example, after the opening 111 of the passive barrier 110 is formed corresponding to one pixel P or only one color pixel R, G, B of one pixel P, the horizontal line Each position SL may be formed to shift its position.

The driver 200 selectively drives the view control mode and the view control mode by controlling a signal applied to each pixel P of the group pixel GP constituting the display panel 100.

The driver 200 generates a gate driver 210, a data driver 220, a timing controller 230, and a gamma voltage for driving the gate line GL and the data line DL of the display panel 100, respectively. The unit 240, the signal converter 250, and the like.

The gate driver 210 sequentially supplies a scan signal to the gate line GL according to a gate control signal supplied from the timing controller 230.

The data driver 220 converts pixel data (gray level) input from the timing controller 230 through the signal converter 250 into an image signal in response to a data control signal supplied from the timing controller 230. This is supplied to the data line DL.

Here, the image signal is a gamma voltage selected in response to the red, green, and blue pixel data input from the outside of the gamma voltages supplied from the gamma voltage generator 240.

The timing controller 230 outputs red, green, and blue pixel data input from the outside, and uses the gate driver 210 and the data driver by using the vertical and horizontal synchronization signals Vsync, Hsync, and the clock CLK. A gate control signal and a data control signal for controlling the driving timing of 220 are respectively generated.

The gamma voltage generator 240 generates gamma voltages for digital / analog conversion of the data driver 220 within the gray scale range and supplies the gamma voltages to the data driver 220.

The signal converter 250 recognizes one mode selected from the field of view control mode, the view control mode, or a lower mode dependent thereto, and displays pixel data output to the data driver 220 according to the recognized mode for each pixel or color. Selectively change pixel by pixel. Accordingly, the image signal applied to the pixels P of the display panel 100 from the data driver 220 is selectively changed.

The backlight assembly 300 includes a plurality of lamps such as a cold cathode fluorescent lamp or an external electrode fluorescent lamp to supply light to the display panel 100.

The inverter 310 drives the lamp by converting the DC power input from the outside into a high voltage AC waveform having a predetermined frequency suitable for the lamp of the backlight assembly 300.

FIG. 2 is a diagram when the display panel according to the first embodiment of the present invention operates in the visual field control mode, and FIG. 3 is a diagram when the display panel of FIG. 2 operates in the view control mode.

The passive barrier 110 is divided into cross sections shown in (a), (c) and (a) and (c) of FIG. 2 with a group pixel GP consisting of three pixels P1, P2, and P3. When arranged together and controlling the signal processing of each group of pixels GP, not only the wide control function but also the dual view / multi view function can be simultaneously implemented.

Here, the passive barrier 110 has a fixed structure, and the pixels P corresponding to the opening 111 and the blocking unit 112 of the passive barrier 110 are turned on / off according to each mode, or other Supply the signal.

Referring to FIGS. 2A and 2C, the passive barrier 110 is positioned at a predetermined interval on the display panel 100, and in the display panel 100, the first pixels are arranged side by side in the horizontal direction. P1, the second pixel P2, and the third pixel P3 form one group pixel GP.

The opening 111 of the passive barrier 110 is formed in the upper region of the second pixel P2 located in the middle, and the blocking unit 112 is disposed on the left and right sides of the second pixel P2. And an upper region of the third pixel P3.

The field of view control mode of the display panel 100 is a mode in which the wide viewing angle mode and the narrow viewing angle mode are selectively switched.

The blocking part 112 of the passive barrier 110 is formed on the front upper portion of the first pixel P1 and the third pixel P3. In this structure, when a signal applied to the first pixel P1 and the third pixel P3 is controlled by an image signal or a black signal, a wide viewing angle mode in which both front and side viewing angles are effective, and a narrow viewing angle mode in which side viewing angles are blocked. Is selectively switched.

Looking more specifically as follows.

Referring to FIG. 2A, in the wide viewing angle mode, an image signal corresponding to one frame is applied to all of the pixels P1, P2, and P3 constituting the display panel 100, and accordingly ( The same frame is displayed in both the front and side directions as b).

Referring to FIG. 2C, in the narrow viewing angle mode, an image signal for displaying one frame only on the second pixel P2 among the plurality of pixels P1, P2, and P3 constituting the display panel 100. Is applied, and a black signal is applied to the first pixel P1 and the third pixel P3.

Accordingly, as shown in (c), a normal frame is displayed in the front direction, and a black frame distorted in the normal frame is displayed in the side direction.

On the other hand, the view control mode of the display panel 100 is a mode in which the dual-view mode and the multi-view mode are selectively switched.

In the structure as shown in FIGS. 3A and 3C, when a signal applied to the second pixel P2 is controlled as an image signal or a black signal, the dual view mode, front and On both sides, the multi-view mode, which displays three different frames, is selectively switched.

Looking more specifically as follows.

Referring to FIG. 3A, a black signal is applied to the second pixel P2 among the pixels P1, P2, and P3 of the display panel 100, and one frame is displayed on the first pixel P1. The first image signal is applied. Then, a second image signal for displaying another frame is applied to the third pixel P3.

Accordingly, a black frame is displayed at the front side as shown in (b), and two different frames are displayed at both sides.

Referring to FIG. 3C, a first image signal constituting one frame is applied to the second pixel P2, and a second image signal constituting another frame is applied to the first pixel P1. The third image signal forming another frame is applied to the third pixel.

As such, when the structure of the passive barrier 110 and the additional signal processing of each pixel P1, P2, and P3 are used, the viewing angle characteristic of the flat panel display device may be efficiently changed, and at the same time, the dual view / multiview function may be performed. Can be provided.

Therefore, while providing a confidentiality function through wide-area control, and when a multi-view such as navigation is required, by providing a dual view / multi-view function, it is possible to provide a variety of different information according to the user's viewing direction.

FIG. 4 is a plan view of a display panel according to a first exemplary embodiment of the present invention, and illustrates an example in which an opening 111 of the passive barrier 110 is formed in a region corresponding to each pixel P. Referring to FIG.

Here, the position of the opening 111 and the blocking portion 112 constituting the passive barrier 110 is a constant interval (for example, for each horizontal line SL), as shown in (a) to (c) of FIG. 1 pixel or 1 color pixel).

When the plurality of pixels P arranged in the horizontal direction form one horizontal line SL, the driving unit 200 converts the horizontal lines SL into the reference horizontal line SL and the alternate horizontal line SL. Drives alternately.

Here, the reference horizontal lines SL indicate the first frame in the visual field control mode, and the alternating horizontal lines SL indicate the second frame in the view control mode.

The color pixels R, G, and B constituting one pixel P may be disposed to be adjacent to each other in a horizontal direction as shown in FIGS. 4A and 4B, or as shown in FIG. 4C. It may be arranged to be adjacent to.

5 is a cross-sectional view of a display panel according to a second embodiment of the present invention, and FIG. 6 is a plan view of a display panel according to a second embodiment of the present invention.

Referring to FIG. 5, the flat panel display according to the second exemplary embodiment of the present invention is a passive barrier for controlling light blocking / transmission at each pixel P constituting the display panel 100 and the display panel 100. 110, a driver 200 for driving the display panel 100 according to a mode.

The structure of the display panel 100 refers to FIG. 1.

As shown in FIG. 5, the passive barrier 110 on the display panel 100 includes an opening 111, a left color pixel C1, and a right color pixel positioned above the reference color pixel C2 to transmit light. Located in the upper portion of the (C3) is composed of a blocking unit 112 for shielding the light. Here, each of the color pixels C1, C2, and C3 is one of the red, green, and blue color pixels R, G, and B that constitute the pixel P of the display panel 100. For example, when the green color pixel G is the reference color pixel C2, the red color pixel R becomes the left color pixel C1, and the blue color pixel B becomes the right color pixel C3. do.

The driver 200 selectively drives the view control mode and the view control mode by controlling signals applied to the reference color pixel C2, the left color pixel C1, and the right color pixel C3 constituting the display panel.

Referring to FIG. 6A, the plurality of color pixels R, G, and B adjacent in the horizontal direction form one horizontal line SL, and the position of the opening 111 every three horizontal lines SL. Is repeated, and the position of the opening 111 is shifted by one color pixel for each horizontal line SL.

Referring to FIG. 6B, the blocking part 112 and the opening 111 of the passive barrier 110 are diagonally formed. When the passive barrier 110 is configured in a stepped manner, some color breakage may occur, and this is solved through the diagonal structure.

7 is a cross-sectional view when the display panel according to the third embodiment of the present invention operates in the visual field control mode, and FIG. 8 is a cross-sectional view when the display panel according to the third embodiment of the present invention operates in the view control mode. to be.

The third embodiment of the present invention uses an active barrier 310, controls the position of the opening 311 and the blocking portion 312 of the active barrier 310 according to the mode, and performs additional signal processing. It provides wide control and multi view together.

7 and 8, the flat panel display device according to the third embodiment includes a display panel 100, an active barrier 310, and a driver 400.

Since the configuration of the display panel 100 is the same as that of FIG. 1, a detailed description thereof will be omitted.

The active barrier 310 is disposed on the display panel 100 and is formed to have an opening 311 in a transparent state that transmits light and an blocking portion 312 in an opaque state that shields the light. When the mode of the display panel 100 is changed, the transparent and opaque states of the opening 311 and the blocking part 312 forming the active barrier 310 are changed to shift the positions of the opening 311 and the blocking part 312. do.

The driver 400 selectively drives the view control mode and the view control mode by controlling signals applied to the pixels P1 to P5 constituting the display panel 100, and controls the active barrier 310 according to the mode. By controlling the transparent / opaque state for each position of the active barrier 310.

Here, the view control mode is a mode in which the wide viewing angle mode and the narrow view angle mode are selectively switched, and the view control mode is a mode in which the dual view mode and the multi view mode are selectively switched.

Assuming that the opening 311 and the blocking part 312 of the active barrier 310 are positioned in the field control mode as shown in FIG. 7, the light applied to the first to fifth pixels P1 to P5 is controlled. The viewing angle mode and the narrow viewing angle mode are selectively switched.

For example, an image signal is transmitted to the second pixel P2 and the fourth pixel P4 corresponding to the opening 311, and the first pixel P1 and the third pixel P3 corresponding to the blocking unit 312. When the black signals are applied to the fifth pixel P5, the side viewing angles are blocked to enter the narrow viewing angle mode.

In addition, when the image signal is applied to all of the first to fifth pixels P1 to P5, all regions of the active barrier 310 are made transparent, and the entire range is set to the opening 311. The luminance and the resolution of the frame indicated by are stored in the wide viewing angle mode.

In the case of switching to the view control mode, the driving unit 400 shifts the positions of the opening 311 and the blocking unit 312 of the active barrier 310 to a certain degree as shown in FIG. 8, and is applied to each of the pixels P1 to P5. Properly control the signal to switch between dual view mode and multi view mode.

The positions of the opening 311 and the blocking portion 312 constituting the active barrier 310 may be changed to correspond to one color pixel as well as one pixel.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand.

Therefore, the embodiments described above are provided to fully inform the scope of the invention to those skilled in the art, and should be understood as illustrative and not limiting in all aspects. The invention is only defined by the scope of the claims.

The flat panel display device according to the present invention configured as described above may comprehensively perform a wide / null viewing angle function for blocking a screen from a side and a dual view / multi view function for displaying different screens according to a viewing angle direction.

In addition, the flat panel display device according to the present invention can efficiently implement the wide / narrow viewing angle function and the dual view / multi view function through a relatively simple structure by combining a barrier having a proper structure and whether the signal is processed.

Claims (20)

A display panel in which a plurality of pixels are arranged in a matrix and wherein adjacent first pixels, second pixels, and third pixels of the plurality of pixels form one group pixel; A passive barrier disposed on the display panel, the passive barrier having an opening positioned in a portion of the group pixel to transmit light and a blocking portion positioned in the remaining region of the group pixel to shield the light; And And a driver configured to selectively drive a view control mode and a view control mode by controlling signals applied to the first pixel, the second pixel, and the third pixel of the display panel. The opening is positioned above the second pixel, the blocking part is positioned above the first pixel and the third pixel, The view control mode is divided into a wide viewing angle mode and a narrow viewing angle mode, And the driving unit applies an image signal forming one frame to all the pixels forming the display panel in the wide viewing angle mode. The method of claim 1, And the first pixel, the second pixel, and the third pixel are adjacent to each other in a horizontal direction. delete delete delete The method of claim 1, The view control mode is divided into a wide viewing angle mode and a narrow viewing angle mode, The driving unit includes: And in the narrow viewing angle mode, an image signal forming one frame is applied to the second pixel among the plurality of pixels, and a black signal is applied to the first pixel and the third pixel. delete The method of claim 1, The view control mode is divided into a dual view mode and a multi view mode, The driving unit includes: In the dual view mode, a black signal is applied to the second pixel among the plurality of pixels, a first image signal constituting one frame is applied to the first pixel, and another frame is applied to the third pixel. And a second image signal. The method according to claim 1 or 8, The view control mode is divided into a dual view mode and a multi view mode, The driving unit includes: In the multi-view mode, a first image signal forming one frame is applied to the second pixel among the plurality of pixels, and a second image signal forming another frame is applied to the first pixel. And a third image signal forming another frame to three pixels. The method of claim 1, Position of the opening and the blocking portion constituting the passive barrier, And a plurality of horizontal lines which are adjacent to each other in the horizontal direction, and are shifted by a predetermined interval for each horizontal line. The method of claim 1, The driving unit includes: Based on a plurality of horizontal lines of pixels adjacent to each other in a horizontal direction, the driving is alternately performed by dividing the horizontal line and the alternating horizontal line. And displaying a first frame of the field of view control mode using the reference horizontal line, and displaying a second frame of the view control mode using the alternating horizontal line. The method of claim 1, And the first pixel, the second pixel, and the third pixel are adjacent to each other in the vertical direction. A display panel in which a plurality of color pixels are arranged in a matrix form, wherein a left color pixel, a reference color pixel, and a right color pixel adjacent in a horizontal direction of the plurality of color pixels form one pixel; A passive barrier disposed above the display panel and configured to have an opening positioned above the reference color pixel to transmit light and a blocking portion positioned above the left color pixel and the right color pixel to shield the light; And A driver configured to selectively drive a view control mode and a view control mode by controlling signals applied to the reference color pixel, the left color pixel, and the right color pixel constituting the display panel; The passive barrier, A plurality of color pixels adjacent in a horizontal direction form a horizontal line, and the positions of the openings are repeated every three horizontal lines, and the positions of the openings are shifted by one color pixel in each horizontal line. Display device. delete 14. The method of claim 13, The passive barrier, Flat panel display, characterized in that formed in oblique lines. A display panel in which a plurality of pixels are arranged in a matrix form, wherein a first pixel, a second pixel, and a third pixel adjacent in a horizontal direction among the plurality of pixels form one group pixel; An active barrier disposed on the display panel and having an opening in a transparent state for transmitting light and an blocking portion in an opaque state for shielding light, wherein the opening and the blocking portion have a transparent and opaque state; And And a driver configured to control a transparent state and an opaque state of the active barrier for each position, and selectively drive a view control mode and a view control mode by controlling signals applied to the group pixels constituting the display panel. Flat panel display. delete 17. The method of claim 16, The view control mode is divided into a wide viewing angle mode and a narrow viewing angle mode, And the active barrier keeps all areas transparent in the wide viewing angle mode. delete 17. The method of claim 16, Position of the opening and the blocking portion constituting the active barrier, And a color pixel corresponding to each of the plurality of pixels or the color pixels constituting each of the plurality of pixels.

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