KR20070109674A - Pixel structure of flat panel display device - Google Patents

Pixel structure of flat panel display device Download PDF

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KR20070109674A
KR20070109674A KR1020060042989A KR20060042989A KR20070109674A KR 20070109674 A KR20070109674 A KR 20070109674A KR 1020060042989 A KR1020060042989 A KR 1020060042989A KR 20060042989 A KR20060042989 A KR 20060042989A KR 20070109674 A KR20070109674 A KR 20070109674A
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green
blue
display device
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subpixels
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KR101264685B1 (en
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이선화
이동훈
최용우
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엘지.필립스 엘시디 주식회사
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/52—RGB geometrical arrangements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0209—Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display

Abstract

A pixel structure of a flat display device is provided to prevent generation of a color error of the flat display device by forming a 4x4 basic unit obtained by placing red, green, blue and white sub-pixels one by one in each row or column by a sub-pixel rendering method. Basic units each including sub-pixels arranged in a matrix form are repetitively disposed to display an image. The basic unit has 4x4 sub-pixels in column and row directions, and red, green, blue and white sub-pixels are arranged one by one in each column, and red, green, blue and white sub-pixels are arranged one by one in each row. The basic unit is formed by a sub-pixel rendering method.

Description

평면표시장치의 화소구조{Pixel structure of flat panel display device} Pixel structure of flat panel display device

도 1은 종래기술에 따른 평면표시장치의 단위화소를 도시한 도면1 is a diagram illustrating a unit pixel of a flat panel display device according to the related art.

도 2는 도 1의 단위화소를 통해 구현된 화소구조를 도시한 도면FIG. 2 is a diagram illustrating a pixel structure implemented through the unit pixel of FIG. 1. FIG.

도 3a 및 도 3b는 종래 기술에 따른 화소구조를 갖는 평면표시장치를 도시한 도면3A and 3B illustrate a flat panel display device having a pixel structure according to the related art.

도 4는 본 발명의 실시예에 따른 단위화소를 도시한 도면4 is a diagram illustrating unit pixels according to an exemplary embodiment of the present invention.

도 5는 본 발명에 따른 화소구조를 갖는 평면표시장치를 도시한 도면5 illustrates a flat panel display device having a pixel structure according to the present invention.

도 6a, 도 6b, 도 6c는 본 발명의 또 다른 실시예에 따른 단위화소를 도시한 도면들6A, 6B, and 6C are diagrams illustrating unit pixels according to yet another exemplary embodiment of the present invention.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

R: 적색 G: 녹색 B: 청색 W: 백색R: Red G: Green B: Blue W: White

V: 열 H:행V: column H: row

P1, P2: 단위화소P1, P2: unit pixel

본 발명은 평면표시장치에 관한 것으로, 더욱 상세하게는 평면표시장치의 화 소구조에 관한 것이다. The present invention relates to a flat panel display, and more particularly, to a pixel structure of a flat panel display.

통상적으로 화상을 표시하는 표시장치로 각종 평판 표시장치들이 대두되고 있다. 이러한 평판 표시장치로는 액정표시장치(Liquid Crystal Display), 전계방출표시장치(Field Emission Display), 플라즈마 표시패널(Plasma Display Panel) 및 발광표시장치(Light Emitting Display) 등이 있다. In general, various flat panel display devices have emerged as display devices for displaying images. Such flat panel displays include a liquid crystal display, a field emission display, a plasma display panel, and a light emitting display.

이러한 평판표시장치는 표시패널에 배열되는 단위화소 수에 대응되는 고유의 해상도를 가지게 된다. 또한, 고품질의 화상을 표시하기 위하여 동일 크기의 표시패널간에도 단위화소수를 높여서 해상도를 달리하고 있다. Such a flat panel display apparatus has an inherent resolution corresponding to the number of unit pixels arranged in the display panel. In addition, in order to display high-quality images, the resolution is increased by increasing the number of unit pixels even between display panels of the same size.

다양한 해상도를 가지는 표시패널에 화상을 표시하기 위해서는 입력화상의 해상도를 변환해야만 한다. In order to display an image on a display panel having various resolutions, the resolution of the input image must be converted.

이러한 해상도 변환은 입력 화상신호의 샘플링율을 변환시켜 이루어지며, 저해상도의 화상을 고해상도 화상으로 변환하는 해상도 확대(Resolution Extend)와 고해상도의 화상을 저해상도 화상으로 해상도 축소(Resolution Reduction)로 구분된다. The resolution conversion is performed by converting a sampling rate of an input image signal, and is classified into resolution extend for converting a low resolution image into a high resolution image and resolution reduction of a high resolution image into a low resolution image.

해상도 변환 중 해상도 축소는 저해상도의 표시패널(QVGA(320×240)의 해상도)에 고해상도 이미지(VGA(640×480)의 해상도)를 표시하고자 할 경우 일부 데이터를 제외하고 샘플링하는 서브 픽셀 랜더링(sub-pixel rendering)방식을 취하게 된다. The resolution reduction during the resolution conversion is performed by sub-pixel rendering (sub-sampled) when some high-resolution images (resolutions of VGA (640 × 480)) are displayed on a low-resolution display panel (resolution of QVGA (320 × 240)). -pixel rendering.

즉, 서브픽셀 랜더링 방식은 픽셀을 이루는 서브픽셀들 즉, R, G, B, W의 화소를 개별적으로 직접 배열하여 고해상도 이미지를 저해상도의 표시패널에 화상으 로 표시하게 된다. That is, in the subpixel rendering method, a high resolution image is displayed as an image on a low resolution display panel by directly arranging subpixels constituting pixels, that is, pixels of R, G, B, and W individually.

이와 같은 서브 픽셀 랜더링 방식은 도 1에 도시된 바와 같이, 고해상도의 이미지를 저해상도 표시패널의 기본단위(P1)를 형성한다. 이때, 상기 2×2의 기본단위(P1)는 하나씩의 R, G, B, W 서브 픽셀들을 매트릭스 형태로 배열한다. As shown in FIG. 1, the sub pixel rendering method forms the basic unit P1 of the high resolution image panel of the low resolution display panel. In this case, the 2 × 2 basic unit P1 arranges one R, G, B, and W subpixels in a matrix form.

또한, 상기 2×2의 기본단위(P1)는 저해상도 표시패널의 해상도인 QVGA(320×240)에 적합하도록 반복적으로 배치되어 도 2에 도시된 바와 같은 평면표시장치의 화소구조를 형성한다.In addition, the 2 × 2 basic unit P1 is repeatedly arranged to conform to the QVGA (320 × 240), which is the resolution of the low resolution display panel, thereby forming the pixel structure of the flat panel display device as shown in FIG. 2.

그러나, 도 2에 도시된 상기 화소구조를 갖는 평면표시장치는 도 3a 및 도 3b에 도시된 컬러 에러(color error)가 발생되는 문제점이 있다. However, the flat display device having the pixel structure illustrated in FIG. 2 has a problem in that a color error illustrated in FIGS. 3A and 3B is generated.

즉, 제1 및 제3 열(V1, V3... V319)과 같은 홀수열에는 적(R), 청(B), 적(R), 청(B)의 서브픽셀들이 연속적으로 배치되고, 제2 및 제4 열(V2, V4...V320)과 같은 짝수열에는 녹(G), 백(W),녹(G), 백(W)의 서브픽셀들이 연속적으로 배치된다. That is, subpixels of red (R), blue (B), red (R), and blue (B) are continuously arranged in odd columns such as the first and third columns (V1, V3, ... V319), Subpixels of green (G), white (W), green (G), and white (W) are successively arranged in even columns such as the second and fourth columns (V2, V4 ... V320).

이때, 도 3a에 도시된 바와 같이, 상기 제1 및 제3 열과 같은 홀수열(V1, V3... V319)에 하이전압을 인가하여 각 홀수열에 위치한 서브픽셀을 온(on)시키면, 백라이트의 광이 온(on)된 서브픽셀의 컬러필터층을 통과하여 노란색(Y)을 구현하게 되고, 도 3b에 도시된 바와 같이, 제2 및 제4 열과 같은 짝수열(V2, V4...V320)에 하이전압을 인가하여 각 짝수열에 위치한 서브픽셀을 온(on)시키면, 백라이트의 광이 온(on)된 서브픽셀의 컬러 필터층을 통과하여 옅은 녹색(Bl)을 구현하게 됨으로써, 상기와 같은 화소구조를 갖는 액정표시장치에는 컬러에러가 발생되는 문제점 이 있다. In this case, as shown in FIG. 3A, when a high voltage is applied to odd-numbered columns V1, V3... V319 as the first and third columns, the sub-pixels located in each odd-numbered column are turned on. Yellow is passed through the color filter layer of the subpixel in which light is turned on, and as shown in FIG. 3B, even columns V2, V4... V320 as the second and fourth columns are illustrated. When a high voltage is applied to each subpixel positioned on even-numbered columns, light of the backlight passes through the color filter layer of the subpixel on to realize pale green color (Bl). A liquid crystal display having a structure has a problem that color errors occur.

상술한 문제점을 해결하기 위한 본 발명의 목적은 서브픽셀 랜더링(sub-pixel rendering) 방식을 통해 형성된 기본단위를 반복적으로 배치하여 형성한 화소구조에 있어서, 컬러 에러의 발생을 방지할 수 있도록 하는 평면표시소자의 화소구조를 제공함에 있다. An object of the present invention for solving the above problems is a plane that can prevent the occurrence of color errors in the pixel structure formed by repeatedly placing the basic unit formed by the sub-pixel rendering method (sub-pixel rendering) The present invention provides a pixel structure of a display device.

상술한 문제점을 해결하기 위한 본 발명에 따른 평면표시장치의 화소구조는 서브픽셀들이 매트릭스형태로 배열된 기본단위를 반복적으로 배치하여 화상을 표시하는 평면표시장치의 화소구조에 있어서, 상기 기본단위는 열과 행 방향으로 4×4의 서브픽셀들을 갖되, 상기 각 열에 R(적), G(녹), B(청), W(백)의 서브픽셀들이 하나씩 배열되고, 상기 각 행에 R(적), G(녹), B(청), W(백)의 서브픽셀이 하나씩 배열되는 것을 특징으로 한다. 상기 기본단위는 서브픽셀 랜더링 방법을 통해 형성하는 것을 특징으로 한다. The pixel structure of the flat panel display device according to the present invention for solving the above problems is a pixel structure of the flat panel display device for displaying an image by repeatedly placing the base unit arranged in a matrix form of the sub-pixel, the base unit is 4x4 subpixels in the column and row directions, each of which has R (red), G (green), B (blue), and W (white) subpixels arranged in each row, and R (red) in each row ), G (green), B (blue), W (white) subpixels are arranged one by one. The basic unit may be formed through a subpixel rendering method.

상기와 같은 특징을 갖는 본 발명의 실시예를 첨부된 도면을 참조하여 보다 상세히 설명하면 다음과 같다. An embodiment of the present invention having the features as described above will be described in more detail with reference to the accompanying drawings.

본 발명은 고해상도의 이미지를 서브픽셀 랜더링(sub-pixel rendering)방식을 통해 샘플링하여 4×4의 기본단위(도 4의 P2)를 형성하고, 이를 반복적으로 배치하여 저해상도의 표시패널에 상응하는 화소구조를 형성한다. According to the present invention, a high-resolution image is sampled through a sub-pixel rendering method to form a 4 × 4 basic unit (P2 in FIG. 4), and the pixels are repeatedly arranged to form a pixel corresponding to a low resolution display panel. To form a structure.

도 4는 본 발명의 일 실시예에 따른 평면표시장치의 화소구조를 도시한 도면 으로, 이를 참조하여 설명하면 다음과 같다. 4 is a diagram illustrating a pixel structure of a flat panel display device according to an embodiment of the present invention.

도 4에 도시된 바와 같이, 열과 행방향으로 4×4의 서브픽셀들이 매트릭스형태로 배열된 기본단위(P2)를 구성하되, 상기 각 열에는 R(적), G(녹), B(청), W(백)의 서브픽셀들이 하나씩 위치되고, 상기 각 행에는 R(적), G(녹), B(청), W(백)의 서브픽셀들이 하나씩 위치되도록 한다. As shown in FIG. 4, 4 × 4 subpixels are arranged in a matrix form in columns and rows, and each column includes R (red), G (green), and B (blue). ), W (white) subpixels are positioned one by one, and each row R (red), G (green), B (blue), W (white) subpixels are positioned one by one.

즉, 4×4의 기본단위(P2)는 제1 열(V1)에 R(적), G(녹), B(청), W(백)의 서브픽셀들이 하나씩 순서대로 위치되고, 제2 열(V2)에 상기 G(녹), R(적), W(백), B(청)의 서브픽셀들이 하나씩 순서대로 위치되고, 제3 열(V3)에 B(청), W(백), R(적), G(녹)의 서브픽셀들이 하나씩 순서대로 위치되고, 제4 열(V4)에 W(백), B(청), G(녹), R(적)의 서브픽셀들이 하나씩 순서대로 위치된다. 또한, 제1, 제2, 제3 및 제4 열(V1, V2, V3, V4)의 서브픽셀들의 배열이 상기와 같이 하나의 열에 R(적), G(녹), B(청), W(백)가 각각 하나씩 위치되면 제1, 제2, 제3 및 제4 행(H1, H2, H3, H4)의 서브픽셀 또한 하나의 행에 R(적), G(녹), B(청), W(백)의 서브픽셀들이 각각 하나씩 위치된다. That is, in the 4 × 4 basic unit P2, subpixels of R (red), G (green), B (blue), and W (white) are positioned one by one in the first column V1, and the second The subpixels of G (green), R (red), W (white), and B (blue) are positioned one by one in column V2, and B (blue) and W (white) in the third column V3. ), R (red), and G (green) subpixels are placed one by one, and in the fourth column V4, W (white), B (blue), G (green), and R (red) subpixels Are placed in order one by one. In addition, the arrangement of the subpixels of the first, second, third and fourth columns V1, V2, V3, and V4 is R (red), G (green), B (blue), When W (white) is positioned one by one, the subpixels of the first, second, third, and fourth rows H1, H2, H3, and H4 are also R (red), G (green), and B ( Blue) and W (white) subpixels are positioned one by one.

이와 같이 각 열(V1, V2, V3, V4) 또는 각 행(H1, H2, H3, H4)에는 R(적), G(녹), B(청), W(백)의 서브픽셀들이 하나씩 위치되도록 한 4×4의 기본단위를 저해상도 표시패널의 해상도인 QGVA(320×240)에 적합하도록 반복적으로 배치한다. In this way, each subpixel V1, V2, V3, V4 or each row H1, H2, H3, H4 has one subpixel of R (red), G (green), B (blue), and W (white). The 4 × 4 basic unit positioned so as to be positioned is repeatedly arranged so as to conform to the QGVA (320 × 240), which is the resolution of the low resolution display panel.

따라서, 상기와 같은 4개의 열(V1, V2, V3, V4)의 및 4개의 행(H1, H2, H3, H4)을 갖는 기본단위(P2)가 반복적으로 배치된 화소구조를 갖는 평면표시장치는 도 5에 도시된 바와 같이, 서로 상이한 색들을 갖는 R(적), G(녹), B(청), W(백)의 서 브픽셀들이 균일하게 분포되어 있어, 2가지 색만 반복적으로 배치되던 종래의 평면표시장치에서 발생된 컬러에러를 방지할 수 있게 된다. Accordingly, a flat panel display having a pixel structure in which the basic units P2 having the four columns V1, V2, V3, and V4 and four rows H1, H2, H3, and H4 are repeatedly arranged. As shown in FIG. 5, subpixels of R (red), G (green), B (blue), and W (white) having different colors are uniformly distributed, and only two colors are repeatedly arranged. The color error generated in the conventional flat display device can be prevented.

즉, 도 5에 도시된 바와 같이, 제1, 제2...제320 열(V1, V2 ...V320) 중 어느 하나의 열에는 하나의 R(적), G(녹), B(청), W(백)의 서브픽셀들이 위치된 기본단위의 하나의 열이 반복적으로 배치되고, 이때, 제1, 제2...제320 열(V1, V2 ...V320) 중 어느 하나의 열에 하이전압을 인가하여 서브픽셀들을 온(on)시키면, 백라이트의 광이 온(on)된 서브픽셀의 컬러필터층을 통과하여 백(W)색을 구현하게 된다. That is, as shown in Figure 5, one of the first, second ... 320 columns (V1, V2 ... V320) is one R (red), G (green), B ( Blue), one column of the basic unit in which the subpixels of W (white) are positioned is repeatedly arranged, and at this time, any one of the first, second, ..., 320th columns (V1, V2, ... V320). When the subpixels are turned on by applying a high voltage to the column of, the light of the backlight passes through the color filter layer of the subpixel that is turned on to realize the white color (W).

따라서 상기와 같은 각 열 또는 각 행에는 R(적), G(녹), B(청), W(백)의 서브픽셀들이 하나씩 위치되도록 한 4×4의 기본단위가 반복적으로 배열된 화소구조를 갖는 평면표시장치에는 컬러에러의 발생을 방지할 수 있게 된다. Therefore, a pixel structure in which 4 × 4 basic units are repeatedly arranged so that subpixels of R (red), G (green), B (blue), and W (white) are positioned in each column or row as described above. In the flat panel display having the color error can be prevented.

더불어, 본 발명의 또 다른 실시예로서 도 6a, 도 6b, 도 6c에 도시된 기본단위 이외에도 각 열 또는 각 행에 R(적), G(녹), B(청), W(백)의 서브픽셀들이 하나씩 위치되도록 한 4×4의 기본단위로 형성된 모든 기본단위는 본 발명의 또 다른 실시예의 예시로서 해석될 수 있다. 때문에 본 발명의 범위는 설명된 실시예에 의해 한정되는 것이 아니라 특허 청구범위에 기재된 기술적 사상에 의해 정해져야 한다. In addition, as another embodiment of the present invention, R (red), G (green), B (blue), W (white) in each column or each row in addition to the basic units shown in Figs. 6A, 6B, and 6C. All of the basic units formed of 4 × 4 basic units having subpixels positioned one by one may be interpreted as an example of another embodiment of the present invention. Therefore, the scope of the present invention should not be limited by the described embodiments, but should be defined by the technical spirit described in the claims.

본 발명에 의하면, 서브픽셀 랜더링(sub-pixel rendering)방식에 의해 각 열 또는 각 행에 R(적), G(녹), B(청), W(백)의 서브픽셀들이 하나씩 위치되도록 4×4 의 기본단위를 형성함으로써, 이 단위화소를 반복적으로 배치하여 형성된 기본단위를 통해 평면표시장치의 컬러에러의 발생을 방지할 수 있게 되는 효과가 있다. According to the present invention, the subpixels of R (red), G (green), B (blue), and W (white) are positioned one by one in each column or each row by sub-pixel rendering. By forming the base unit of × 4, it is possible to prevent the occurrence of color errors in the flat panel display device through the base unit formed by repeatedly arranging the unit pixels.

Claims (2)

서브픽셀들이 매트릭스형태로 배열된 기본단위를 반복적으로 배치하여 화상을 표시하는 평면표시장치의 화소구조에 있어서, In the pixel structure of a flat panel display device which displays an image by repeatedly arranging basic units in which subpixels are arranged in a matrix form, 상기 기본단위는 열과 행 방향으로 4×4의 서브픽셀들을 갖되, 상기 각 열에 R(적), G(녹), B(청), W(백)의 서브픽셀들이 하나씩 배열되고, 상기 각 행에 R(적), G(녹), B(청), W(백)의 서브픽셀이 하나씩 배열되는 것을 특징으로 하는 평면표시장치의 화소구조. The basic unit has 4 × 4 subpixels in column and row directions, and each subpixel of R (red), G (green), B (blue), and W (white) is arranged in each column. A pixel structure of a flat panel display device, wherein subpixels of R (red), G (green), B (blue), and W (white) are arranged one by one. 제1 항에 있어서, 상기 기본단위는 The method of claim 1, wherein the basic unit 서브픽셀 랜더링 방법을 통해 형성하는 것을 특징으로 하는 평면표시장치의 화소구조.A pixel structure of a flat panel display device formed by a subpixel rendering method.
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US8395571B2 (en) 2009-07-14 2013-03-12 Samsung Display Co., Ltd. Pixel arrangement structure for organic light emitting display
CN105185352A (en) * 2015-08-28 2015-12-23 厦门天马微电子有限公司 Method and device for image rim modification
CN105185352B (en) * 2015-08-28 2018-10-30 厦门天马微电子有限公司 The edge method of modifying and edge decorating device of image
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