JP3194456U - Display panel and display device - Google Patents

Abstract

A display panel and a display device with excellent display quality are provided. A display panel includes a first substrate, a second substrate provided opposite to the first substrate, and a plurality of pixels P1 and P2. The plurality of pixels are disposed between the first substrate and the second substrate, and each includes a first electrode layer 141 and an insulating layer, and the first electrode layer is on the insulating layer. The first long electrodes S1 and S3 are installed and any two adjacent pixels among the plurality of pixels are defined as first and second pixels, respectively. The first elongate electrode of the pixel has first and second side edges that are spaced apart from each other, the second side edge being closer to the second pixel than the first side edge, And the second side edge may form a first and second angle with the surface of the insulating layer, and the second angle may be achieved by being greater than the first angle. The display device includes a display panel and a backlight module. [Selection] Figure 2

Description

  The present invention relates to a display panel and a display device, and more particularly to a horizontally driven display panel and a display device.

  With the progress of science and technology, flat display devices are widely used in various technical fields, and in particular, applied to liquid crystal display devices. Liquid crystal display devices are gradually replacing conventional CRT display devices due to their excellent characteristics such as thin and light, low power consumption and no radiation emission, and for example, mobile phones, portable multimedia devices It is applied in many electronic products such as notebook computers, liquid crystal televisions and liquid crystal monitors.

  A conventional liquid crystal display device mainly includes a liquid crystal display panel (LCD Panel) and a backlight module (Backlight Module), both of which are installed facing each other. The liquid crystal display panel includes a color filter substrate, a TFT (Thin Film Transistor) substrate, and a liquid crystal layer interposed between the two substrates. The color filter substrate, the TFT substrate, and the liquid crystal layer are arranged in an array. A plurality of arranged pixel units are formed. The backlight module emits light that passes through the liquid crystal display panel, whereby each pixel unit of the liquid crystal display panel is colored to form an image.

  In order to respond to the various needs of different consumers, each supplier constantly researches and develops new display panels and display devices to provide consumers with better display quality. Therefore, how to provide a new display panel and display device capable of providing excellent display quality in order to satisfy the needs of consumers is currently an important issue.

  In view of the above problems, an object of the present invention is to provide a display panel and a display device excellent in display quality so as to satisfy the needs of consumers. In particular, it is an object of the present invention to provide a display panel and a display device that are less likely to cause a crosstalk phenomenon and have an excellent optical effect as compared with the prior art.

  In order to achieve the above object, a display panel according to the present invention includes a first substrate, a second substrate provided to face the first substrate, and a plurality of pixels. The pixels are arranged in an array between the first substrate and the second substrate, and each has a first electrode layer and an insulating layer, and the first electrode layer is disposed on the insulating layer. And having two first adjacent electrodes arranged along the first direction among the plurality of pixels, the first pixel and the second pixel, respectively. When defined as a pixel, the first elongate electrode of the first pixel is adjacent to the second pixel, and the first elongate electrode of the first pixel is separated from the first side edge. And the second side edge, the second side edge is closer to the second pixel than the first side edge, and the first side edge and the second side edge Edge, first and second angles were respectively formed between the surface of the insulating layer, the second angle is greater than the first angle.

  In order to achieve the above object, a display device of the present invention is a display device comprising a display panel and a backlight module provided opposite to the display panel, wherein the display panel is a first display device. A substrate, a second substrate, and a plurality of pixels, wherein the first substrate and the second substrate are provided opposite to each other, and the plurality of pixels includes the first substrate; The plurality of pixels each have a first electrode layer and an insulating layer, and the first electrode layer is disposed on the insulating layer. And any two adjacent pixels arranged along a first direction among the plurality of pixels are designated as a first pixel and a second pixel, respectively. When the first elongated electrode of the first pixel is defined as The first elongated electrode of the first pixel has a first side edge and a second side edge spaced apart from each other, the second side edge being adjacent to the pixel; The first side edge and the second side edge are closer to the second pixel than the first side edge, and the first side edge and the second side edge are between the surface of the insulating layer and the second angle. The second angle is larger than the first angle.

  In one embodiment, the difference between the second angle and the first angle is not less than 5 ° and not more than 20 °.

  In one embodiment, the second angle is 80 ° or less.

  In one embodiment, the first elongate electrode extends along the second direction and forms a predetermined angle between the first direction and the second direction.

  In one embodiment, the display panel further includes a liquid crystal layer disposed between the first substrate and the second substrate, and each of the plurality of pixels has a second electrode layer. The insulating layer is interposed between the first electrode layer and the second electrode layer, and the first electrode layer is disposed between the liquid crystal layer and the insulating layer.

  According to the above, in the display panel and the display device of the present invention, the first electrode layer is disposed on the insulating layer and includes the first elongated electrode, and the first pixel layer includes the first elongated electrode. When any two adjacent pixels arranged along one direction are defined as a first pixel and a second pixel, respectively, the first elongated electrode of the first pixel is the second pixel. The first elongated electrode of the first pixel has a first side edge and a second side edge spaced from each other, and the second side edge is the first side. The first and second side edges are closer to the second pixel than the edge, forming a first angle and a second angle with the surface of the insulating layer, and the second side edge The angle is formed larger than the first angle. As a result, compared to the prior art, the display panel and display device of the present invention are less prone to crosstalk and have excellent optical effects. Accordingly, the display panel and the display device of the present invention have excellent display quality and can satisfy the needs of consumers.

1 is a cross-sectional side view of a display panel according to a preferred embodiment of the present invention. FIG. 2 is a plan view of first electrode layers of two pixels in the display panel shown in FIG. 1. It is the figure which showed the 1st electrode layer in the Example from which this invention differs. It is the figure which showed the 1st electrode layer in the Example from which this invention differs. 1 is a view showing a display device according to a preferred embodiment of the present invention.

  Hereinafter, a display panel and a display device according to a preferred embodiment of the present invention will be described with reference to the related drawings. Among them, the same components are denoted by the same reference numerals.

  Please refer to FIG. 1 and FIG. FIG. 1 is a sectional side view of a display panel 1 according to a preferred embodiment of the present invention, and FIG. 2 is a plan view of a first electrode layer 141 of two adjacent pixels P1 and P2 in the display panel 1 shown in FIG. It is.

  The display panel 1 in the present embodiment is, for example, a fringe field switching (FFS) type liquid crystal display panel or another horizontal drive type liquid crystal display panel, but is not limited thereto. In the present embodiment, the first direction X, the second direction Y, and the third direction Z are shown, and any one of the first direction X, the second direction Y, and the third direction Z is shown. The two are substantially orthogonal to each other. Among these, the first direction X is substantially parallel to the extending direction of the scanning line, the second direction Y is substantially parallel to the extending direction of the data line D, and the third direction Z is , Other directions orthogonal to the first direction X and the second direction Y, respectively. Further, FIG. 2 shows only the first electrode layer 141 of the two pixels P1 and P2, and the first substrate 11, the second substrate 12, and other film layers and elements are not shown. In essence, FIG. 1 includes a cross-sectional side view along line AA in FIG.

  As shown in FIGS. 1 and 2, the display panel 1 includes a first substrate 11, a second substrate 12, and a liquid crystal layer 13. The first substrate 11 and the second substrate 12 are disposed to face each other, and the liquid crystal layer 13 is interposed between the first substrate 11 and the second substrate 12. Among these, the first substrate 11 and the second substrate 12 are made of a light-transmitting material, and are, for example, a glass substrate, a quartz substrate, or a plastic substrate, but are not limited here. The display panel 1 further includes one pixel array, and the pixel array is formed by a combination of a color filter array and a TFT array. Basically, the pixel array is formed in an array and is interposed between the first substrate 11 and the second substrate 12. Among these, the pixel array includes a plurality of pixels (or sub-pixels), and here, two adjacent pixels P1 and P2 are illustrated. In addition, the display panel 1 in this embodiment can further include a plurality of scanning lines (not shown) and a plurality of data lines D, and the plurality of scanning lines and the plurality of data lines D intersect. The plurality of pixel regions are demarcated.

  In this embodiment, the TFT arrays in the plurality of pixels P1 and P2 are disposed on the first substrate 11, and each of the first electrode layer 141, the insulating layer 142, and the second electrode layer 143 is provided. I have. The second electrode layer 143, the insulating layer 142, and the first electrode layer 141 are disposed in order from the bottom toward the top from the first substrate 11 to the second substrate 12. Among these, the insulating layer 142 covers the second electrode layer 143, and the first electrode layer 141 is provided on the insulating layer 142, so that the insulating layer 142 and the second electrode layer 141 are connected to the second electrode layer 141. The first electrode layer 141 is interposed between the liquid crystal layer 13 and the insulating layer 142 while being interposed between the electrode layer 143 and the electrode layer 143. Further, the data line D is also provided on the first substrate 11, and the pixel P1 can be provided with another insulating layer 145 covering the data line D, and the second electrode layer 143 has It is provided on the insulating layer 145 to prevent the second electrode layer 143, the data line D, and the first electrode layer 141 from being short-circuited. Among these, the material of the insulating layer 142 and the insulating layer 145 is not limited, but may be, for example, silicon oxide (SiOx), silicon nitride (SiNx), or other insulating materials. The first electrode layer 141 and the second electrode layer 143 are transparent conductive layers, and the material thereof is not limited. For example, indium tin oxide (ITO) or indium zinc oxide is used. It can be an indium-zinc oxide (IZO). In this embodiment, the first electrode layer 141 is a pixel electrode electrically connected to the data line D, and the second electrode layer 143 is a common electrode. However, in other embodiments, the first electrode layer 141 may be a common electrode while the second electrode layer 143 may be a pixel electrode.

  The display panel 1 may further include a black matrix BM and a filter layer (not shown). The black matrix BM is installed on the first substrate 11 or the second substrate 12 and corresponds to the data line D. Installed. The black matrix BM is a non-translucent material, such as a metal or resin, and the metal can be, for example, chromium, chromium oxide, or a chromium oxynitride compound. In the present embodiment, the black matrix BM is disposed on the side of the second substrate 12 facing the first substrate 11 and is located above the third direction Z in the data line D. When the display panel 1 is viewed from above, the black matrix BM can cover the data lines D. In addition, the filter layer (not shown) is provided on the second substrate 12 and the black matrix BM on the side facing the first substrate 11 or on the first substrate 11. Since the black matrix BM is made of a non-light-transmitting material, a non-light-transmitting region can be formed on the second substrate 12, and as a result, a light-transmitting region can be defined. The black matrix BM forms a plurality of light shielding regions and at least one light shielding region between two adjacent filter portions. In the present embodiment, the black matrix BM and the filter layer are respectively installed on the second substrate 12, but in other embodiments, the black matrix BM or the filter layer is installed on the first substrate 11, The first substrate 11 may be a BOA (BM on array) substrate or a COA (color filter on array) substrate, but is not limited thereto. The display panel 1 can further include a protective layer (for example, over-coating, not shown), and the protective layer can cover the black matrix BM and the filter layer. In this case, the material of the protective layer may be a photoresist material, a resin material or an inorganic material (for example, SiOx / SiNx) in order to protect the black matrix BM and the filter layer from being damaged by the influence of the subsequent process. it can. The display panel 1 further includes two alignment layers (not shown). One alignment layer is disposed so as to cover the first electrode layer 141, and the other alignment layer is a black matrix. The BM and the filter layer are installed on the side facing the first substrate 11.

  Please refer to FIG. 2 again. The pixels P1 and P2 are pixels arranged adjacent to each other, and the first electrode layer 141 in each pixel includes a plurality of long electrodes (S1, S2, and S3). In one pixel, a long electrode adjacent to a pixel adjacent thereto is defined as a first long electrode (that is, the long electrodes S1 and S3 can be referred to as a first long electrode). . More specifically, since the first electrode layer 141 in this embodiment is a pixel electrode, the first electrode layer 141 is further provided through the opening O while further including at least one opening O. It is electrically connected to the corresponding pixel TFT (one of the TFT arrays, not shown). Here, the gray scale voltage of the pixel P1 (or P2) is input to the first electrode layer 141 via the source and drain of the TFT.

  In addition, the plurality of long electrodes (including the first long electrode) extend along the second direction Y and are arranged at intervals in the first direction X. In this embodiment, the number of long electrodes is three (indicated by S1, S2, and S3), and the plurality of long electrodes S1, S2, and S3 are spaced apart from each other by a certain distance. 1 in parallel along direction X. However, in different embodiments, the number of elongated electrodes may be, for example, two, four (see, for example, those shown in FIGS. 3A and 3B), or any other number.

  As described above, in the display panel 1, when a plurality of scanning lines receive a scanning signal, the TFTs of the pixels corresponding to the scanning lines are turned on, and one data signal corresponding to the pixels of each row is supplied to the display panel 1. By transmitting to the corresponding pixel electrodes of the plurality of pixels via the plurality of data lines D, screen display on the display panel 1 becomes possible. In this embodiment, the gray scale voltage is applied to the first electrode layer 141 (pixel electrode) of each pixel by each data line D, and an electric field is generated between the first electrode layer 141 and the second electrode layer 143. By driving the liquid crystal molecules in the liquid crystal layer 13 so as to rotate on a plane constituted by the first direction X and the second direction Y, the light is adjusted thereby, and an image is displayed on the display panel 1. Can be displayed.

  In this case, as described below, one outermost long electrode (that is, the first long electrode) in one first electrode layer 141 of the plurality of pixels P1 is adjacent to each other. And a second side edge adjacent to the adjacent pixel P2, and each of the first side edge and the second side edge is an insulating layer 142. And a first angle θ1 and a second angle θ2. That is, in this embodiment, as shown in FIG. 1, the outermost long electrode S3 (first long electrode) near the pixel P2 in the pixel P1 (may be the first pixel) is the pixel. It has a first side edge S31 separated from P2 (which may be a second pixel) and a second side edge S32 close to the pixel P2, and the surface of the first side edge S31 and the insulating layer 142 The angle formed by the second side edge S32 and the surface of the insulating layer 142 is the second angle θ2. In this case, the second angle θ2 is larger than the first angle θ1 (θ2> θ1), and preferably the difference between the second angle θ2 and the first angle θ1 is 5 ° or more and 20 ° or less. (5 ° ≦ (θ2−θ1) ≦ 20 °).

  Similarly, in the pixel P2 in this embodiment, the outermost long electrode S1 (that is, the first long electrode) adjacent to the adjacent pixel P1 is also the first side edge S11 that is separated from the pixel P1. And the second side edge S12 close to the pixel P1, and the angle formed by the first side edge S11, the second side edge S12, and the surface of the insulating layer 142 is also the first angle θ1. And the second angle θ2 (θ2> θ1).

  More specifically, in the long electrode S2 which is not located on the outermost side in the pixel, in order to make the electric field distribution in each pixel uniform, the two side edges and the insulating layer 142 are arranged. Are preferably the same third angle θ3, more preferably the third angle θ3 and the first angle θ1 are the same.

  In one embodiment, the first angle θ1 is 47 °, for example, and the second angle θ2 is 68 °, for example. In another embodiment, the first angle θ1 is, for example, 60 °, and the second angle θ2 is, for example, 68 °. In another embodiment, the first angle θ1 is, for example, 32 °, and the second angle θ2 is, for example, 40 °. Further, all the pixels in the present embodiment can have all the technical features of the elongated electrodes S1 to S3 in the first electrode layer 141 of the pixel P1 (or P2). Alternatively, in other embodiments, only some of the pixels may have the technical features of the elongated electrodes S1 to S3 in the first electrode layer 141 of the pixel P1 (P2). Is not limited to this.

  To be described again, in the present embodiment, the second angle θ2 is made larger than the first angle θ1, and the following advantages are brought about. When the second angle θ2 is larger than θ1 (θ2> θ1), two adjacent long electrodes in two adjacent pixels [that is, the long electrode S3 (first long electrode) of the pixel P1] And the long edges S32 and S12 of the long electrode S1 (first long electrode) of the pixel P2] are relatively close to each other, and the first electrode layer 141 and the first electrode Since the electric field between the two electrode layers 143 is relatively concentrated and dense, a crosstalk phenomenon is less likely to occur. Therefore, the two pixels P1 and P2 can be designed to be relatively close to each other, the resolution of the display panel 1 can be relatively increased, and the light emission area of the pixels can be increased. In addition, when the first angle θ1 is reduced (when it is smaller than the second angle θ2), the electric field between the long electrode and the second electrode layer 143 in the same pixel is relatively horizontal. This means that the pretilt angle of the liquid crystal is excellent in uniformity, and the control performance for the liquid crystal is improved, so that a preferable optical effect of the display panel 1 can be realized.

  Here, the method of making the second angle θ2 larger than the first angle θ1 can be achieved by, for example, using a photomask technique twice. That is, by controlling the photomask etching parameters (for example, etching time, gas,...) Twice, different first angles θ1 and second angles θ2 can be obtained. Alternatively, the first angle θ1 and the second angle θ2 that are different depending on the technique of the multi-tone mask can be obtained. In this case, the multi-tone mask technique includes a gray-tone mask (GTM) technique and a half-tone mask (half-tone mask, HTM) technique. By obtaining two types of photoresists having different thicknesses in accordance with the process, two different types of etching gradients are generated on the elongated electrodes S1 and S3, and thereby different first angles θ1 and second angles θ2 are set. Can be obtained. The second angle θ2 is larger than the first angle θ1, but the second angle θ2 should not be excessively increased, and is preferably set to 80 degrees or less (θ2 ≦ 80 °), for example. This is because, when an alignment layer (not shown) exists on the first electrode layer 141 and the second angle θ2 is too large, the side edge gradient of the long electrode S3 at the second angle θ2 is increased. When the alignment layer is formed, the thickness of the alignment layer on the side edge is reduced, and in some cases, the alignment layer is torn, resulting in a non-uniform phenomenon. This is because an adverse effect is caused on the orientation.

  Reference is now made to FIGS. 3A and 3B showing the first electrode layers 141a and 141b in different embodiments of the present invention. First, it should be noted that the patterns of the first electrode layers 141a and 141b in FIGS. 3A and 3B are merely examples, and the present invention should not be limited thereto.

  As shown in FIG. 3A, the main difference between the first electrode layer 141a and the first electrode layer 141 in FIG. 2 is that the first electrode layer 141a has long electrodes S1 and S3 (both are first electrodes). It is a place where only two long electrodes are provided.

  Further, as shown in FIG. 3B, the main difference between the first electrode layer 141b and the first electrode layer 141 in FIG. 2 is that, in the first electrode layer 141b, the extending direction of the data line D is different from the first electrode layer 141b. Although four elongated electrodes S1, S2, S3, and S4 extending substantially in parallel are provided, the first direction X and the second direction Y are not perpendicular to each other, and are predetermined. By forming an acute angle, the pixels are configured to have a parallelogram shape. In addition, each of the long electrodes S1, S2, S3, and S4 in the first electrode layer 141b has two bent portions in the vertical direction in the drawing. Among these, the long electrodes S1 and S4 correspond to first long electrodes that are respectively close to adjacent pixels.

  Reference is now made to FIG. 4 showing a display device 2 in a preferred embodiment of the present invention.

  The display device 2 includes a display panel 3 and a backlight module 4, and the display panel 3 and the backlight module 4 are installed to face each other. Among these, the display panel 3 can be the above-described display panel 1, and the first electrode layer of the pixel of the display panel 1 is the above-described first electrode layer 141, 141a or 141b, or a change mode thereof. can do. The structure of the first electrode layer and its details can be referred to above and will not be described again here. When the light E emitted from the backlight module 4 is transmitted through the display panel 3, it is displayed in color via each pixel in the display panel 3, and an image can be formed.

  In summary, in the display panel and display device of the present invention, the first electrode layer is disposed on the insulating layer and has the first elongated electrode, and among the plurality of pixels, When any two adjacent pixels arranged along the first direction are defined as a first pixel and a second pixel, respectively, the first elongated electrode of the first pixel is the second pixel. The first elongate electrode of the first pixel has a first side edge and a second side edge that are separated from each other, and the second side edge is the first side edge. The first and second side edges are closer to the second pixel than the one side edge, and the first side edge and the second side edge form a first angle and a second angle with the surface of the insulating layer, respectively. The second angle is formed larger than the first angle. As a result, compared to the prior art, the display panel and display device of the present invention are less prone to crosstalk and have excellent optical effects. Accordingly, the display panel and the display device of the present invention have excellent display quality and can satisfy the needs of consumers.

  The above is merely illustrative and not limiting. Any equivalent modifications or changes made without departing from the technical idea and scope of the present invention are included in the scope of claims for utility model registration.

  With the above configuration, the present invention provides a new display panel and display device having excellent display quality to satisfy consumer needs.

DESCRIPTION OF SYMBOLS 1, 3 Display panel 11 1st board | substrate 12 2nd board | substrate 13 Liquid crystal layer 141, 141a-141b 1st electrode layer 142, 145 Insulating layer 143 2nd electrode layer 2 Display apparatus 4 Backlight module BM Black matrix D Data line E Light O Opening P1, P2 Pixel S1-S4 Long electrode S11, S31 First side edge S12, S32 Second side edge X First direction Y Second direction Z Third direction θ1 First angle θ2 Second angle θ3 Third angle

Claims (10)

A first substrate;
A second substrate provided facing the first substrate;
A plurality of pixels arranged in an array between the first substrate and the second substrate, each having a first electrode layer and an insulating layer;
The first electrode layer is disposed on the insulating layer and has a first elongated electrode,
When any two adjacent pixels arranged in the first direction among the plurality of pixels are defined as a first pixel and a second pixel, respectively, the first of the first pixels The elongated electrode is adjacent to the second pixel,
The first elongate electrode of the first pixel has a first side edge and a second side edge that are separated from each other, and the second side edge is more than the first side edge. Are also close to the second pixel, and the first side edge and the second side edge form a first angle and a second angle with the surface of the insulating layer, respectively. The display panel, wherein the second angle is larger than the first angle.   The display panel according to claim 1, wherein a difference between the second angle and the first angle is 5 ° or more and 20 ° or less.   The display panel according to claim 1, wherein the second angle is 80 ° or less. The first elongated electrode extends along a second direction, and forms a predetermined angle between the first direction and the second direction. Display panel as described. A liquid crystal layer disposed between the first substrate and the second substrate;
Each of the plurality of pixels includes a second electrode layer, the insulating layer is interposed between the first electrode layer and the second electrode layer, and the first electrode layer is The display panel according to claim 1, wherein the display panel is disposed between a liquid crystal layer and the insulating layer. A display device comprising a display panel and a backlight module provided opposite to the display panel,
The display panel includes a first substrate, a second substrate, and a plurality of pixels.
The first substrate and the second substrate are provided facing each other, and the plurality of pixels are arranged in an array between the first substrate and the second substrate, Each pixel has a first electrode layer and an insulating layer, and the first electrode layer is disposed on the insulating layer and has a first elongated electrode, When any two adjacent pixels arranged in the first direction among the pixels are defined as a first pixel and a second pixel, respectively, the first elongated shape of the first pixel An electrode is adjacent to the second pixel;
The first elongate electrode of the first pixel has a first side edge and a second side edge that are separated from each other, and the second side edge is more than the first side edge. Are also close to the second pixel, and the first side edge and the second side edge form a first angle and a second angle with the surface of the insulating layer, respectively. The display device, wherein the second angle is larger than the first angle.   The display device according to claim 6, wherein a difference between the second angle and the first angle is 5 ° or more and 20 ° or less.   The display device according to claim 6, wherein the second angle is 80 ° or less.   The first elongate electrode extends along a second direction, and forms a predetermined angle between the first direction and the second direction. The display device described.   The display panel further includes a liquid crystal layer disposed between the first substrate and the second substrate, the plurality of pixels each including a second electrode layer, and the insulating layer Is interposed between the first electrode layer and the second electrode layer, and the first electrode layer is disposed between the liquid crystal layer and the insulating layer. The display device according to claim 6.

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