KR101308262B1 - Liquid Crystal Display Device - Google Patents

Abstract

The present invention relates to a liquid crystal display device suitable for driving the data line sharing liquid crystal panel left and right inverted.

A liquid crystal display device includes: a liquid crystal panel in which pixels adjacent to a data line are arranged to share a data line, and the shared pixels are sequentially driven; A data driver for alternately supplying odd-numbered pixel driving signals and even-numbered pixel driving signals to a data line on the liquid crystal panel; And a switching adaptive data distribution unit for distributing pixel data to be supplied to the data driver into odd-numbered and even-numbered ones, and realigning the pixel data correspondingly according to a driving mode of the liquid crystal panel.

Left / Right Invert, Array, Share, Data Line, Data Driver

Description

Liquid crystal display device

BRIEF DESCRIPTION OF THE DRAWINGS For a better understanding of the drawings used in the detailed description of the present invention, a brief description of each drawing is provided.

1 is a plan view illustrating a data line sharing liquid crystal panel.

2 is a block diagram illustrating a data line sharing liquid crystal display device.

FIG. 3 is a detailed block diagram showing details of the switchable adaptive data distributor shown in FIG.

4 is a diagram for describing a memory map of color pixel data stored in the memory of FIG. 2.

DESCRIPTION OF THE REFERENCE NUMERALS to the main parts of the drawings "

10 liquid crystal panel 12 gate driver

14: data driver 16: timing control unit

18 switch adaptive data distribution unit 30 serial-to-parallel converter

32,34: first and second forward realigner

36,38: first and second reverse realigner 40,42: first and second selector

44: memory

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device including a data line sharing type liquid crystal panel, and more particularly, to a liquid crystal display device for driving left and right inverted.

The liquid crystal panel displays an image by adjusting the amount of light to be transmitted in response to an electrical signal for each pixel area. Such liquid crystal panels are being used as display screens of portable information terminals or display screens of computer systems, and their use is expanding in the direction of displaying moving images such as television signals. In addition, liquid crystal panels are being enlarged to meet the user's demand for larger screens. As the size of the liquid crystal panel increases, the number of data lines also increases, and many data drivers have to be used.

In order to reduce the number of data drivers, as shown in FIG. 1, a liquid crystal panel that allows two pixels to share a data line has been highlighted. According to FIG. 1, odd-numbered color subpixels and even-numbered color subpixels are connected to one data line, while each is connected to a different gate line. In other words, in a liquid crystal panel sharing a data line, one color pixel data cannot be applied to one data line. Red and green, red and blue, or green and blue are applied to the data line.

Recently, the liquid crystal panel is driven in a state in which the left and right are inverted due to the requirement of use. Accordingly, the data line sharing liquid crystal panel should also be able to be driven in an inverted form. However, when driven reversely, the odd-numbered data line and the even-numbered data line are reversed, and the image cannot be displayed normally.

Accordingly, it is an object of the present invention to provide a liquid crystal display device suitable for driving the data line sharing liquid crystal panel left and right inverted.

According to an aspect of an exemplary embodiment, there is provided a liquid crystal display including: a liquid crystal panel in which pixels adjacent to a data line are arranged to share a data line, and the shared pixels are sequentially driven; A data driver for alternately supplying odd-numbered pixel driving signals and even-numbered pixel driving signals to a data line on the liquid crystal panel; And a switching adaptive data distribution unit for distributing pixel data to be supplied to the data driver into odd-numbered and even-numbered ones, and realigning the pixel data correspondingly according to a driving mode of the liquid crystal panel.

Other objects, other advantages, and other features of the present invention in addition to the above objects will become apparent from the detailed description of the invention in conjunction with the accompanying drawings.

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

2 is a view illustrating a data line sharing liquid crystal display according to an exemplary embodiment of the present invention. The liquid crystal display of FIG. 2 is connected to the driving gate driver 12 connected to the gate lines GL1 to GLn on the liquid crystal panel 10, and to the data lines DL1 to DLm on the liquid crystal panel 10. Data driver 14 is provided. In the liquid crystal panel 10, red, green, and blue color sub-pixels are formed in each pixel area divided by the gate lines GL1 to GLn and the data lines DL1 to DLm. The color sub-pixels are grouped into two groups to share the data line DL. Further, odd-numbered pixels are connected to odd-numbered gate lines and even-numbered pixels are connected to even-numbered gate lines. Color sub-pixels are arranged in the order of red, green, and blue in each pixel line.

The gate driver 12 sequentially and exclusively enables the plurality of gate lines GL1 to GLn. To this end, a plurality of gate signals exclusively having shift enable pulses (that is, widths of gate high voltages) are sequentially supplied by their widths to the plurality of gate lines GL1 to GLn. The width of the enable pulse corresponds to half of the horizontal sync signal.

The data driver 14 supplies pixel driving signals to the plurality of data lines DL1 to DLm when any one of the plurality of gate lines GL1 to GLn is enabled to drive odd-numbered pixels or even-numbered pixels. To be possible. When the odd gate lines GL1, GL3,..., GLn-1 are enabled, the data driver 14 transmits pixel driving signals to be charged to the odd pixels to the plurality of data lines DL1 to DLm. Output On the contrary, when the even-numbered gate lines GL2, GL4,..., GLn are enabled, the data driver 14 transmits a pixel driving signal to be charged in the even-numbered pixels to the plurality of data lines DL1 to GLm. Supply.

The switching adaptive data distribution unit 18 divides the color pixel data from an external video source (for example, the video signal demodulation unit of the graphic card or the television receiving module of the computer system) into the odd and even pixel data. do. When dividing the pixel data, the switchable adaptive data distribution unit 18 rearranges the color sub-pixels in accordance with the arrangement of the pixels on the gate line in response to whether the liquid crystal panel 10 is driven in the left-right inverted state or the forward state. . The rearranged pixel data is supplied to the data driver.

FIG. 3 is a detailed block diagram illustrating in detail the switching adaptive data distribution unit 18 shown in FIG. Referring to FIG. 3, the switchable adaptive data distributor 18 includes first and second forward reorderers 32, 34 and first reverse reorderers 36, 38 connected to the serial-to-parallel converter 30. ). The serial-to-parallel converter 30 converts color pixel data sequentially input from an external video source into a parallel form. By this serial-to-parallel converter 30, two sets of color pixel data (i.e., odd-numbered red, green and blue pixel data (Ro, Go, Bo) and even-numbered red, green and blue pixel data (Re, Ge) , Be)) in parallel form to the first and second forward realigners 32,34 and the first and second reverse realigners 36,38. Using two sets of color pixel data, the first forward rearranger 32 is the odd-numbered red and blue pixel data (Ro, Bo) and even-numbered that can be supplied to the odd-numbered pixels in the driving state of the forward state. The green pixel data Ge is rearranged in order. The second forward rearranger 34 also uses two sets of color pixel data, which is the odd-numbered green pixel data Go and the even-numbered red and even-numbered pixels that can be supplied to the even-numbered pixels in driving in the forward state. The blue pixel data Re and Be are rearranged in order. Using two sets of color pixel data, the first reverse rearranger 36 uses odd-numbered green pixel data and even-numbered blue and red pixel data that can be supplied to the odd-numbered pixels in driving in the reverse state. Rearrange the order of Be, Re). The second reverse rearranger 38 also uses two sets of color pixel data, and even-numbered blue and red pixel data (Be, Re) and radix which can be supplied to even-numbered pixels in driving in the reverse state. The first green pixel data Go is rearranged in order. The first and second forward realigners 32 and 34 and the first and second reverse realigners 36 and 38 enable rearrangement of the pixel data by wirings.

The first selector 40 includes two sets of color pixel data from the first and second forward realigners or the first and second reverse realigners 36 in response to the forward / inverse mode control signal F / R. 2 sets of color pixel data from (38) are supplied to the second selector (42). When the forward mode is designated by the forward / reverse mode control signal F / R, the first selector 40 generates two sets of color pixel data from the first and second forward realigners 32 and 34. It supplies to 2 selection part 42. When the reverse mode is designated by the forward / reverse mode control signal F / R, the first selector 40 generates two sets of color pixel data from the first and second reverse realigners 36 and 38. It supplies to 2 selection part 42.

The second selector 42 transfers two sets of color pixel data, which are rearranged in the forward or reverse direction, from the first selector 42 to the memory 44 alternately, so that the odd and even color pixels are distributed. To be stored in the formatted form. The memory 44 stores two sets of rearranged color pixel data alternately input from the second selector 42 in different storage areas. Alternatively, the memory 44 may be sequentially supplied to the data driver 14 shown in FIG. 2 in a state where the odd-numbered color pixel data and the even-numbered color pixel data stored in different storage areas are separated. 4A shows a memory map of pixel data stored in the memory 44 when driving in the forward state, and FIG. 4B shows a memory map of pixel data stored in memory 44 when driving in the reverse state (ie, left and right reverse state). Indicates. As shown in Figs. 4A and 4B, the memory 44 becomes identical to the arrangement of the pixels in the forward mode and the reverse mode. Accordingly, even if the data line sharing liquid crystal panel is driven in the reverse state (i.e., left and right reverse state), the image is displayed accurately. The second selector 42 is controlled by one of the memory control signals MCS supplied to the memory 44 by the timing controller 16 of FIG. 2.

As described above, in the data line sharing liquid crystal display according to the present invention, the color pixel data is rearranged to be suitable for forward or reverse driving in accordance with forward / reverse driving of the liquid crystal panel. Accordingly, even if the data line sharing liquid crystal panel is driven in the reverse state (i.e., left and right reverse state), the image is displayed accurately.

As described above, the present invention has been described with reference to the embodiments shown in the drawings, which are merely exemplary, and a person of ordinary skill in the art without departing from the spirit and scope of the present invention. It will be apparent that various modifications, changes, and equivalent other embodiments are possible. Accordingly, the scope of the present invention to be protected should be defined by the appended claims.

Claims (5)

Pixels adjacent to the data line are arranged to share the data line and share the data line. A liquid crystal panel in which pixels are sequentially driven; The odd pixel driving signals are excellent with the data line on the liquid crystal panel. A data driver to alternately supply the first pixel driving signals; And Pixel data to be supplied to the data driver is superior to those of the odd number. And the pixels according to the driving mode of the liquid crystal panel. A switchable adaptive data distribution for reordering the data, The switch adaptive data distribution unit A memory for storing pixel data supplied to the data driver; Parallel number of the pixel data to be sequentially supplied to the memory A serial-to-parallel converter that converts data into data; Display of parallel pixel data from the serial-to-parallel converter in forward mode A first realignment unit arranged according to a position to be; A second reordering unit for arranging parallel pixel data from the serial-to-parallel converter according to the position to be displayed in the reverse mode; And And a selector for selectively supplying rearranged pixel data from the first and second rearrangements to the memory. delete The method according to claim 1, The first realignment portion includes first and second forward realigners, The first forward realigner, Cardinal red and blue pixel data that can be supplied to cardinal pixels And green pixel data of eventh order in order, The second forward realigner, A liquid crystal display for arranging the odd-numbered green pixel data and the even-numbered red and blue pixel data that can be supplied to even-numbered pixels in order. The method according to claim 1, The second realignment portion includes first and second reverse realigners, The first reverse realigner, The odd-numbered green pixel data and the even-numbered blue and red pixel data that can be supplied to the odd-numbered pixels are arranged in order, The second reverse realigner, A liquid crystal display for arranging even-numbered blue and red pixel data and odd-numbered green pixel data that can be supplied to even-numbered pixels in order. The method according to claim 1, The memory stores a pixel data alternately input from the selection unit. Liquid crystal display for storing by different.

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