40results about How to "Prevent white spots" patented technology

This invention relates to a liquid crystal display device using a color filter which uses a specific liquid crystal composition and a specific pigment. The present invention provides a liquid crystal display device which prevents decreases in voltage holding ratio (VHR) of a liquid crystal layer and increases in ion density (ID), and solves the problem of display defects such as white spots, uneven alignment, and burn-in. This liquid crystal display device is characterized by preventing decreases in the voltage holding ratio (VHR) of a liquid crystal layer and increases in ion density (ID), and by suppressing the occurrence of display defects such as burn-in, and in particular is useful in VA-mode and PSVA-mode liquid crystal display devices for active matrix driving, and can be applied in liquid crystal display devices such as liquid crystal TVs, monitors, mobile phones and smart phones.

The present invention relates to a liquid crystal display device using color filters in which a specific liquid crystal composition and a specific pigment are used. The present invention provides a liquid crystal display device in which the voltage holding rate (VHR) of a liquid crystal layer is reduced, and an increase in ion density (ID) is prevented, and which overcomes problems with display defects such as white voids, uneven alignment, and image retention. This liquid crystal display device has the features of reducing the voltage holding rate (VHR) of a liquid crystal layer, preventing an increase in ion density (ID), and suppressing display defects such as image retention, and is therefore useful particularly as a liquid crystal display device having a VA mode or PSVA mode for active-matrix driving, and can be applied as a liquid crystal display such as for a liquid crystal TV, a monitor, a portable telephone, or a smartphone.

This invention provides a liquid-crystal display element that has the following: a first substrate and a second substrate laid out so as to face each other; thin-film transistors that are provided on the first substrate and sandwich a liquid-crystal layer containing a liquid-crystal composition between the first and second substrates; and pixel electrodes that are driven by said transistors and comprise a transparent conductive material. Each thin-film transistor has a gate electrode, an oxide semiconductor layer provided such that an insulating layer is interposed between said oxide semiconductor layer and the gate electrode, and a drain electrode and a source electrode provided so as to be electrically connected to the oxide semiconductor layer. The liquid-crystal composition contains one or more compounds selected from the group consisting of compounds that can be represented by general formulas (LC3) through (LC5) and one or more compounds selected from the group consisting of compounds that can be represented by general formulas (II-a) through (II-f).

The provided liquid crystal display device prevents reduction in the voltage holding ratio (VHR) of the liquid crystal layer, prevents increases in the ion density (ID), and solves the problem of display faults such as white spots, orientation irregularities, burn-in, etc. As the liquid crystal layer, this liquid crystal display device uses a liquid crystal composition which contains a liquid crystal compound of a specific structure, and, as an in-cell retardation film, uses an optically anisotropic body obtained by polymerizing a polymerizable liquid crystal composition which contains, in a specific ratio, a polymerizable liquid crystal compound of a specific structure. Because this liquid crystal display device has the feature of preventing reduction in the voltage holding ratio (VHR) of the liquid crystal layer, preventing increases in the ion density (ID) and suppressing the occurrence of display faults such as burn-in, the liquid crystal display device is particularly useful as an active matrix VA mode or PSVA mode liquid crystal display device, and can be applied to liquid crystal display devices such as liquid crystal televisions, monitors, mobile telephones and smart phones.

This invention provides a liquid-crystal display element that has the following: a first substrate and a second substrate laid out so as to face each other; a plurality of gate wires and data wires that are laid out on the first substrate in a matrix pattern and sandwich a liquid-crystal layer containing a liquid-crystal composition between the first and second substrates; thin-film transistors provided at the intersections of the gate wires and the data wires; and pixel electrodes that are driven by said transistors and comprise a transparent conductive material. Each thin-film transistor has a gate electrode, an oxide semiconductor layer provided such that an insulating layer is interposed between said oxide semiconductor layer and the gate electrode, and a drain electrode and a source electrode provided so as to be electrically connected to the oxide semiconductor layer. The liquid-crystal composition contains one or more compounds selected from the group consisting of compounds that can be represented by general formula (LC1) or general formula (LC2) and one or more compounds selected from the group consisting of compounds that can be represented by general formulas (II-a) through (II-f).

The invention discloses a PCB laminating structure and method based on a buffer material, wherein the intermediate layer is a mirror steel plate and a laminated unit; The mirror steel plate is symmetrically distributed on the upper and lower sides of the lamination unit, a plurality of substrate units are arranged in the lamination unit, and mirror steel plates are arranged between adjacent substrate units. The substrate unit comprises: a plate to be pressed, a buffer layer symmetrically distributed on the upper and lower sides of the plate to be pressed; The buffer layer comprises a release film and a buffer material, and the release film is symmetrically distributed on the upper and lower sides of the buffer material; The buffer material is a prepreg. The FR The prepreg is used as cushioning material, which improves the uniformity of temperature and pressure in pressing process, is beneficial to the thickness control of plate, and avoids the appearance of white spots after pressing and the phenomenon of delamination, skateboard and deviation of layer inside the plate after pressing.

The invention relates to a cleaning solution for solar monocrystalline silicon wafers, which comprises 1% to 5% by mass of 30% hydrogen peroxide solution, 0.05% to 0.30% by mass of potassium hydroxide and 94.95% to 98.95% by mass of pure water. The solar single crystal silicon wafer cleaning solution utilizes the strong oxidizing properties of hydrogen peroxide and OH ‑ The corrosion of the oxide film can effectively remove the organic matter, oxide film and pollutants deposited in the oxide film on the surface of the silicon wafer, improve the cleanliness of the silicon wafer surface, and prevent white spots and chromatic aberrations during flocking. In addition, the present invention also relates to a cleaning method for solar monocrystalline silicon chips.

The invention relates to a corrosion protection method, in particular to a method for preventing corrosion of an aluminum can after cooking. The method for preventing corrosion of aluminum cans after cooking includes the following steps: before cooking aluminum cans, adding an acid resistant to high temperatures above 121°C and oxidation resistance to RO water used for cooking and sterilization of aluminum cans, and adjusting the pH of the RO water to 5.0 to 7.0, and control the conductivity of RO water below 50μs / cm; or before the aluminum cans are cooked, add corrosion and scale inhibitors whose corrosion inhibition rate increases with the increase of temperature to the RO water used for the cooking and sterilization of aluminum cans agent, the mass percentage of corrosion and scale inhibitor to RO water is greater than 0 and not greater than 2.5‰. In the present invention, the pH value of the RO water for cooking and sterilization is controlled to be 5.0 to 7.0, and the conductivity of the RO water is controlled below 50 μs / cm, or a corrosion and scale inhibitor is added to the RO water for cooking and sterilization of aluminum cans. Prevent the water quality of the retort from causing white spots on the aluminum cans after high-temperature cooking and sterilization.

The present invention relates to a liquid crystal display device employing a colour filter in which a specific liquid crystal composition, a specific pigment, and a specific compound are used. The present invention provides a liquid crystal display device which inhibits a reduction in the voltage holding ratio (VHR) of a liquid crystal layer, inhibits an increase in ion density (ID), and resolves problems related to display defects such as white spots, alignment unevenness, and burn-in. This liquid crystal display device is characterized in that a reduction in the voltage holding ratio (VHR) of the liquid crystal layer is inhibited, an increase in ion density (ID) is inhibited, and the occurrence of display defects such as burn-in is suppressed. Accordingly, the liquid crystal display device is particularly useful as an active-matrix-drive TN-mode, IPS-mode, polymer-stabilized IPS-mode, FFS-mode, OCB-mode, VA-mode, or ECB-mode liquid crystal display device. Furthermore, the liquid crystal display device is applicable as a liquid crystal display device such as a liquid-crystal TV, monitor, portable telephone, or smartphone.