• Customers Visiting On November
    Nov 08 , 2019

    Customers Visiting On November

    Italy Customer Visiting On November 6th, We have our Italy customer Andrea with his colleages visting our factory. We had the meeting talking about TFT LCD Displays for small size 3.5''-4.3''. Customer visited our workshop, tested our samples,  confirmed the project details: price, lead time etc. Order will be confirm after they back to Italy and test on their product. The main products relate to: 3.5'' standard TFT LCD Display, 3.5'' touch screen display, 3.5'' TN Display, 3.5'' IPS LCD Display, 4.3'' touch panel screen and 4.3'' customized display
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  • Customers Visiting
    Oct 17 , 2019

    Customers Visiting

    Russia Customer Visiting from Auguest to October This is a customized project, it takes around 2 months from the first time meeting to order delivery. Our friend Filipp has visited us for 3 times, and very satisfied with our product and service. The second project starts from the second week after first order delivered. Here we would like to share with you of our Customize project management: 1. Inquiry → 2. Engineer analysis → 3. Quotation → 4. Order confirmed → 5. Prepare drawing → 6. Drawing confirmed → 7. Custom Fee → 8. Prepare Samples → 9. Sample Approved → 10. Mass Order production → 11. Delivery
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  • Customers Visiting in September
    Sep 24 , 2019

    Customers Visiting in September

    Sinocrystal -- Customer Visiting on September US Customer Visiting Customer Visiting Plant Customer Checking Samples
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  • Liquid crystal is a state of matter – like liquid, solid, and gas. The term “liquid crystal” is used to denote a material that e
    Oct 11 , 2018

    Liquid crystal is a state of matter – like liquid, solid, and gas. The term “liquid crystal” is used to denote a material that e

    Liquid crystal is a state of matter – like liquid, solid, and gas. The term “liquid crystal” is used to denote a material that exhibits a liquid phase under certain conditions. In order to understand what differentiates a liquid crystal phase from a liquid or solid phase, it is necessary to understand what defines these phases. The difference lies in the order of matter on a molecular, atomic or subatomic level. Order is a function of the energy stored within matter, and hence a function of the temperature of matter. Thus, one could say that temperature equals motion. There is no motion at absolute zero temperature (0 Kelvin). Very close to absolute zero, a state of matter called the “Bose-Einstein condensate” can exist. A little further away from absolute zero we have solids, which are characterized by limited motion of the molecules, atoms and ions that make up the material. This limited motion is a vibration within the molecule, and an oscillation around a fixed position. In a crystal for example, the centers of gravity within the molecules vibrate around fixed positions on a crystal lattice, while the general orientation of non-spherical molecules vibrates around a preferred orientation. When a solid melts, this long range order (fixed average position, fixed average orientation many thousands of molecular units across) breaks up. If both long range orders (position and orientation) dissipate at the same time as when the melting point is reached, a liquid phase is formed. In a liquid, there still is some level of order, but only in a short range (i.e. a few molecules across). The hydrogen bonds between water molecules are a good example. When, with increasing temperature, this short range order gets lost and the molecules become completely independent in their motion, we speak about a gas or vapor. Finally, when electrons or other sub-atomic particles lose their order with respect to the rest of the molecule, we speak about plasma. Nature does not require that each phase is formed: Some materials can go from solid to gas without a liquid phase. Neither does nature require that positional and orientational order get lost in one step and at the same temperature. Depending on environmental conditions such as pressure or solvent concentration in a mixture, phases may be skipped or additional phases may appear when changing the temperature of a material. If positional order gets lost at the melting point, but orientational long range order is maintained up to a higher temperature, a liquid crystal phase is formed. The temperature at which all orientational long range order gets lost is called clearing point, as at such temperature a typically milky liquid crystal turns into a clear fluid. Positional long range order can get lost in steps while orientational order is maintained. As a result there can be many liquid crystal phases with different geometry and distinct phase transition temperatures between them. In some phases the liquid crystal is al...
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  • Most (not all) LCDs change the polarization state of light passing through a layer of liquid crystal material
    Aug 02 , 2019

    Most (not all) LCDs change the polarization state of light passing through a layer of liquid crystal material

    On the most basic level, most (not all) LCDs change the polarization state of light passing through a layer of liquid crystal material. The geometry of that layer is controlled by a competition between boundary conditions and an applied electric field. Usually, for this type of LCD, nematic liquid crystals are used with special coatings applied to the rear and front substrates. The coatings serve to create the boundary conditions and to apply the required electric field. On the outside of the LCD cell, optical films (including polarizer films) are attached. They translate the change in polarization of the light into a bright and dark contrast. The display structure gets assembled in such a way that zero applied field gives one extreme brightness state and fully applied field results in the other extreme. An intermediate field creates an intermediate brightness level. The most common materials used to impose boundary conditions are called polyimides. A solution (or a precursor) of a polyimide is deposited on the substrates and cured. The type of polyimide and the type of liquid crystal define what angle the liquid crystal molecules will assume at the contact point between the polyimide and the liquid crystal. If the materials are ‘similar’, the LC molecules lay flat. If they are dissimilar (like oil and water), the LC molecules stand upright. ‘Molecular engineering’ is used to achieve the ideal angle for the application, which is different for different kind of displays. In order to define the direction of alignment, the polyimide surface is uni-directionally rubbed or brushed. LC molecules align parallel to that rubbing direction. If the angle and rubbing direction do not match on the two alignment surfaces, the liquid crystal alignment is elastically deformed. The nematic LC molecules want to be parallel to each other, but if the rubbing direction on either surface is orthogonal, the LC molecules are forced to twist very slightly from molecule to molecule until across the entire layer the direction has turned by 90°. There are three principal modes of deformation possible in a nematic liquid crystal. Each has its own elastic constant (spring constant). Some deformation may require more or less force, depending on the molecular structure of the liquid crystal. The three principal deformations are called ‘splay’, ‘bend’, and ‘twist’.
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