LCD panel

Abstract

To provide a liquid crystal panel that can suppress the degradation of image quality due to diffracted light. [Solution] A liquid crystal panel comprising a first substrate 2 on which a plurality of pixel portions 17, each having a pixel electrode 5a and a circuit element 16 formed thereon, are arranged in a matrix in the vertical and horizontal directions, wherein in at least a portion of the image display area of ​​the liquid crystal panel, the planar layout of the circuit elements 16 within the plane of the pixel portion 17 is different from the planar layout of the circuit elements 16 within the plane of adjacent pixel portions 17 in the vertical and horizontal directions.

Description

Technical Field

[0001] The present invention relates to a liquid crystal panel.

Background Art

[0002] Currently, in liquid crystal panels, along with miniaturization, improvement of image quality is also desired.

[0003] FIG. 3 is a (a) top view and (b) cross-sectional view taken along line A-A' showing a liquid crystal display device in the prior art. FIG. 4 is a top view schematically showing a pixel portion of a liquid crystal panel in the prior art. FIG. 5 is a (a) partially enlarged top view and (b) partial cross-sectional view schematically showing a pixel portion of a liquid crystal panel in the prior art. As shown in FIG. 3, the liquid crystal display device in the prior art includes a liquid crystal panel 1. The liquid crystal panel 1 includes a first substrate 2 made of, for example, glass on which a transparent pixel electrode 5a and an alignment film 4 are formed, and a second substrate 3 made of, for example, glass on which a transparent counter electrode 5b and an alignment film 4 are formed. A liquid crystal 8 is enclosed in a gap between the first substrate 2 and the second substrate 3 formed by bonding the electrode surfaces facing each other through a peripheral seal 7 containing a spacer 6, which is a transmissive liquid crystal panel.

[0004] The liquid crystal panel 1 is mounted on a circuit board 9. An electrode pad 10 provided on the first substrate 2 and an electrode pad 11a provided on the circuit board 9 are electrically connected by a wire 12. A counter electrode 5b provided on the second substrate 3 and an electrode pad 11b provided on the circuit board 9 are electrically connected by, for example, an ultraviolet curable conductive resin 14 mainly composed of Ag. By applying a voltage between the pixel electrode 5a and the counter electrode 5b through these electrical connections, image display by the liquid crystal 8 is performed. Note that an opening (or light transmissive portion) 9a for allowing light to pass through is provided in a region of the circuit board 9 facing the image display region of the liquid crystal panel 1. Also, a light source (not shown) such as an LED is disposed at an arbitrary position.

[0005] As shown in Figure 4, in a conventional liquid crystal panel 1, multiple pixel units 17 are arranged in a matrix (grid) in the vertical and horizontal directions on a first substrate 2. As shown in Figures 4 and 5, each pixel unit 17 has a pixel electrode 5a and a circuit element 16 that electrically controls the pixel electrode 5a. The circuit element 16 is a semiconductor circuit element composed of, for example, a thin-film transistor based on single-crystal silicon. As shown in Figure 4, the circuit element 16 is electrically connected to the scan line 15a and the signal line 15b. Furthermore, the planar layout of the pixel electrode 5a and the circuit element 16 within the plane of each pixel unit 17 is the same for all pixel units 17 within the image display area. That is, here, each pixel electrode 5a is located approximately in the center of the plane of each pixel unit 17, and each circuit element 16 is located on the lower left side of the plane of each pixel unit 17. (See, for example, Patent Document 1) [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2014-74904 [Overview of the Initiative] [Problems that the invention aims to solve]

[0007] In conventional liquid crystal panels 1, as described above, the planar layout of the pixel electrodes 5a and circuit elements 16 within the plane of each pixel 17 is the same for all pixel 17 in the image display area. As a result, a certain regularity in the optical structure pattern is formed by multiple pixel electrodes 5a and multiple circuit elements 16 as a whole. This structure pattern generates unwanted diffracted light, which may degrade image quality.

[0008] This invention has been made in view of the above problems, and aims to provide a liquid crystal panel that can suppress the deterioration of image quality due to diffracted light. [Means for solving the problem]

[0009] A liquid crystal panel comprising a first substrate on which a plurality of pixel portions, each having a pixel electrode and a circuit element for electrically controlling the pixel electrode, are arranged in a matrix in the vertical and horizontal directions, and a second substrate on which a counter electrode is formed, wherein liquid crystal is sealed between the first substrate and the second substrate, and in at least a portion of the image display area of ​​the liquid crystal panel, the planar layout of the circuit elements within the plane of the pixel portion is different from the planar layout of the circuit elements within the plane of adjacent pixel portions in the vertical and horizontal directions.

[0010] A liquid crystal panel comprising a first substrate on which a plurality of pixel portions, each having a pixel electrode and a circuit element for electrically controlling the pixel electrode, are arranged in a matrix in the vertical and horizontal directions, and a second substrate on which a counter electrode is formed, wherein liquid crystal is sealed between the first substrate and the second substrate, and in at least a portion of the image display area of ​​the liquid crystal panel, the planar layout of the pixel electrodes within the plane of the pixel portion is different from the planar layout of the pixel electrodes within the plane of adjacent pixel portions in the vertical and horizontal directions. [Effects of the Invention]

[0011] According to the present invention, it is possible to suppress the deterioration of image quality due to diffracted light. [Brief explanation of the drawing]

[0012] [Figure 1] (a) Top view, (b) Partial cross-sectional view schematically showing the pixel portion of the liquid crystal panel in Embodiment 1 of the present invention. [Figure 2] (a) Top view, (b) Partial cross-sectional view schematically showing the pixel portion of the liquid crystal panel in Embodiment 2 of the present invention. [Figure 3] (a) Top view, (b) Cross-sectional view of A-A' illustrating a liquid crystal display device in the prior art. [Figure 4] A schematic top view showing the pixel area of ​​a liquid crystal panel in conventional technology. [Figure 5] (a) Partially enlarged top view, (b) Partial cross-sectional view schematically showing the pixel area of ​​a liquid crystal panel in conventional technology. [Modes for carrying out the invention]

[0013] The liquid crystal display device in the embodiment of the present invention has the same basic configuration as the conventional liquid crystal display device shown in Figure 3. The liquid crystal panel 1 in the embodiment of the present invention is a light-transmitting liquid crystal panel in which liquid crystal 8 is sealed in the gap between the first substrate 2 and the second substrate 3, which are formed by bonding a first substrate 2 made of glass, for example, on which pixel electrodes 5a and alignment films 4 are formed, and a second substrate 3 made of glass, for example, on which counter electrodes 5b and alignment films 4 are formed, with the electrode surfaces facing each other via a peripheral seal 7 containing a spacer 6. The electrical connection structure between the liquid crystal panel 1 and the circuit board 9 is the same as the structure shown in Figure 3.

[0014] In the embodiment of the present invention, the liquid crystal panel 1 is driven by a field sequential method that utilizes RGB light emitted from a light source such as an LED. However, the driving method of the liquid crystal panel 1 is not limited to this, and may also be a color filter method in which a color filter is provided at each pixel portion 17 of the liquid crystal panel 1.

[0015] In embodiments of the present invention, the liquid crystal panel 1 is, for example, a ferroelectric liquid crystal panel using a ferroelectric liquid crystal as the liquid crystal 8. However, the liquid crystal 8 is not limited to this and may be, for example, a nematic liquid crystal.

[0016] The pixel electrode 5a and counter electrode 5b are made of a transparent conductive material such as ITO. The alignment film 4 is made of an inorganic alignment film such as SiO2 or an organic alignment film made of an organic polymer compound. The first substrate 2 and the second substrate 3 may be made of transparent plastic or the like. The liquid crystal panel 1 may also be configured as a light-reflecting liquid crystal panel. In this case, the first substrate 2 is made of silicon, for example, and the second substrate 3 is made of glass, for example. That is, the present invention can be applied not only to light-transmitting liquid crystal panels but also to light-reflecting liquid crystal panels. However, the present invention is preferably applied to light-transmitting liquid crystal panels. [Examples]

[0017] Figure 1 is a schematic top view and a partial cross-sectional view of the pixel portion of a liquid crystal panel in Embodiment 1 of the present invention. As shown in Figure 1, in the liquid crystal panel 1 of Embodiment 1 of the present invention, a plurality of pixel portions 17 are arranged in a matrix (grid) in the vertical and horizontal directions on a first substrate 2. Each pixel portion 17 has a pixel electrode 5a and a circuit element 16 that electrically controls the pixel electrode 5a. The circuit element 16 is a semiconductor circuit element composed of, for example, a thin-film transistor based on single-crystal silicon. The circuit element 16 is electrically connected to the scan line 15a and the signal line 15b. These configurations are the same as those of the liquid crystal panel 1 in the prior art shown in Figure 4 above.

[0018] In the liquid crystal panel 1 in Example 1 of the present invention, the planar layout of the pixel electrode 5a in the plane of each pixel portion 17 is the same for all pixel portions 17 within the image display region. That is, here, for all pixel portions 17 within the image display region, the pixel electrode 5a is disposed substantially at the center in the plane of the pixel portion 17. On the other hand, the planar layout of the circuit element 16 in the plane of each pixel portion 17 is not the same for all pixel portions 17 and is different for at least some of the pixel portions 17. Specifically, for example, in at least some of the pixel portions 17, the planar layout of the circuit element 16 in the plane of each pixel portion 17 is configured to be different from the planar layout of the circuit element 16 in the plane of the pixel portions 17 adjacent to each other in the vertical and horizontal directions. For example, in some of the pixel portions 17, as shown in FIG. 1(b), the circuit element 16 of the pixel portion 17 located at the center of the drawing is disposed substantially at the center in the plane of the pixel portion 17, the circuit element 16 of the pixel portion 17 located on the left side of the drawing is disposed on the right side in the plane of the pixel portion 17, and the circuit element 16 of the pixel portion 17 located on the right side of the drawing is disposed on the left side in the plane of the pixel portion 17.

[0019] Note that the planar layout of the circuit element 16 in the plane of each pixel portion 17 is preferably configured so that no particular regularity occurs in the entirety of all pixel portions 17 within the image display region (so as to be in a random state). In this case, it is preferably configured so that no regularity occurs at least in the vertical and horizontal directions, and more preferably, so that no regularity occurs even in the diagonal direction. The region configured so that no regularity occurs is preferably the entire image display region, but may be only a partial region of the image display region. Also, in the case where regularity occurs locally only in a very small part of the image display region, it can be regarded that no regularity occurs in the entire image display region.

[0020] In the liquid crystal panel 1 in Example 1, since the regularity of the planar structure pattern formed by the plurality of circuit elements 16 within the image display region is disrupted, the generation of unnecessary diffracted light is reduced.

Example

[0021] FIG. 2 is a (a) top view and (b) partial cross-sectional view schematically showing the pixel portion of the liquid crystal panel in Example 2 of the present invention. The liquid crystal panel 1 in Example 2 of the present invention has the following configuration in addition to the configuration of the liquid crystal panel 1 in Example 1 described above. That is, as shown in FIG. 2, in the liquid crystal panel 1 in Example 2 of the present invention, the planar layout of the pixel electrode 5a in the plane of each pixel portion 17 is not the same for all the pixel portions 17 in the image display region, and is different from each other in at least some of the pixel portions 17. Specifically, for example, the planar layout of the pixel electrode 5a in the plane of each pixel portion 17 is configured to be different from the planar layout of the pixel electrode 5a in the plane of the pixel portions 17 adjacent to each other in the vertical and horizontal directions. For example, as shown in FIG. 2(b), the pixel electrode 5a of the pixel portion 17 located at the center of the drawing is arranged substantially at the center in the plane of the pixel portion 17, the pixel electrode 5a of the pixel portion 17 located on the left side of the drawing is arranged on the right side in the plane of the pixel portion 17, and the pixel electrode 5a of the pixel portion 17 located on the right side of the drawing is arranged on the left side in the plane of the pixel portion 17.

[0022] Note that the planar layout of the pixel electrode 5a in the plane of each pixel portion 17 is preferably configured so that no particular regularity occurs in the whole of all the pixel portions 17 in the image display region (so as to be in a random state). In this case, it is preferably configured so that no regularity occurs at least in the vertical and horizontal directions, and more preferably so that no regularity occurs even in the diagonal direction. The region configured so that no regularity occurs is preferably the entire image display region, but may be only a part of the image display region. Also, when local regularity occurs only in a very small part of the image display region, it can be regarded that no regularity occurs in the whole image display region.

[0023] Also, in Example 2, the configuration of Example 1 is not essential and can be omitted.

[0024] In the liquid crystal panel 1 of Example 2, the regularity of the planar structure pan formed by multiple pixel electrodes 5a within the image display area is disrupted, thereby reducing the generation of unwanted diffracted light.

[0025] The present invention is not limited to the embodiments described above, and other embodiments are possible. [Explanation of Symbols]

[0026] 1 LCD panel 2 First board 3 Second board 4. Alignment film 5a Pixel electrode 5b Counter electrode 6 Spacers 7. Peripheral seal supply liquid crystal 9 Circuit board 9a Opening (or light-transmitting part) 10 electrode pads 11a Electrode Pads 11b Electrode Pads 12 wires 14 Conductive resin 15a Scan lines 15b signal line 16 Circuit Elements 17 Pixel section

Claims

1. A liquid crystal panel comprising a first substrate on which a plurality of pixel portions, each having a pixel electrode and a circuit element for electrically controlling the pixel electrode, are arranged in a matrix in the vertical and horizontal directions, and a second substrate on which a counter electrode is formed, wherein liquid crystal is sealed between the first substrate and the second substrate, In at least a portion of the image display area of ​​the liquid crystal panel, the planar layout of the circuit elements within the plane of the pixel portion differs from the planar layout of the circuit elements within the plane of adjacent pixel portions in the vertical and horizontal directions. A liquid crystal panel characterized by the following features.

2. The liquid crystal panel according to claim 1, characterized in that, in at least a portion of the image display area of ​​the liquid crystal panel, the planar layout of the circuit elements within the plane of the pixel portion is configured such that no regularity occurs between the plurality of pixel portions arranged in the vertical and horizontal directions.

3. A liquid crystal panel comprising a first substrate on which a plurality of pixel portions, each having a pixel electrode and a circuit element for electrically controlling the pixel electrode, are arranged in a matrix in the vertical and horizontal directions, and a second substrate on which a counter electrode is formed, wherein liquid crystal is sealed between the first substrate and the second substrate, In at least a portion of the image display area of ​​the liquid crystal panel, the planar layout of the pixel electrodes within the plane of the pixel portion differs from the planar layout of the pixel electrodes within the plane of adjacent pixel portions in the vertical and horizontal directions. A liquid crystal panel characterized by the following features.

4. The liquid crystal panel according to claim 3, characterized in that, in at least a portion of the image display area of ​​the liquid crystal panel, the planar layout of the pixel electrodes within the plane of the pixel portion is configured such that no regularity occurs between the plurality of pixel portions arranged in the vertical and horizontal directions.

Images