2013年5月12日星期日

The materials structural analysis of the AMOLED panel Character LCD Module


OLED the (OrganicLight-EmittingDisplay, an organic light emitting display) is an organic semiconductor material and a luminescent material emitting phenomenon in the electric field is driven by the carrier injection and composite. OLED light emitting principle is the ITO transparent electrode and a metal electrode as the anode and the cathode of the device, in the constant voltage drive, the electrons and holes injected from the cathode and the anode, respectively, to the electron and hole transport layer, electrons and holes, respectively, through the electronic migrate to the light emitting layer and a hole transport layer, and meet in the light emitting layer to form excitons and the light emitting molecule, which emits visible light through radiative relaxation. The radiated light can be observed from the ITO side, and a metal electrode film also played the role of the reflective layer.TFT LCD Module
TFT LCD side, represented by TN LCD panel working principle are introduced. TN liquid crystal component structure: nematic liquid crystals sandwiched between two glass. The first on the surface of such a glass coated with a transparent conductive film (ITO) electrode for use. Plating on the ITO glass surface to the distribution agent to the liquid crystal along a lot of and arranged parallel to the direction of the surface of the glass. The use of an electric field allows the principle of rotation of the liquid crystal, applying a voltage on the two electrodes is such that the steering direction of the liquid crystal polarization parallel to the direction of the electric field. Because the refractive index of the liquid crystal with the direction of the liquid crystal is changed, the result is the light passes through the TN type liquid crystal after its polarizing vary. You can use the power switch to control the light shade. This will be formed when the light-transmissive white the opacity when black characters can be displayed on the screen.
Obviously, the two panels of the different light sources, OLED is self-luminous, the TFT using a backlight, both the imaging mechanism is completely different. By contrast is not difficult to find, OLED has thinner and lighter, self-luminous (no backlight), wide viewing angle, high-resolution, high-brightness, response fast, low energy consumption, wide temperature range, seismic capability, low cost A soft display characteristics and can be achieved, wherein many of the characteristics of the TFT LCD panel is difficult to achieve.OLED Module

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