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Huang C.,Shantou University | Li C.,Shantou University | Ouyang Y.-D.,Shantou University | Liu J.,Shantou Goworld Display Co. | Wu Y.-J.,Shantou Goworld Display Co.
Gongneng Cailiao yu Qijian Xuebao/Journal of Functional Materials and Devices | Year: 2013

Aluminum thin film is frequently used as the layer sandwiched between two Mo layers in the metallic bridge and acts as the function of connecting ITO pattern in the capacitive touch screen. The reflectivity of Aluminum is high for the visible light. As a result, reflectivity of the capacitive touch screen with the metallic bridge is higher than that without the metallic bridge, which affects the screen display effect. In order to reduce the reflectivity of Al film, its surface roughness is increased and then the same to the diffuse reflectance. Several Al thin films with different surface roughness are deposited by changing the DC magnetron sputtering conditions, and the reasons for different surface roughness are analyzed. The technological conditions to solve the problem of metallic bridge shadow are found.


Shen Y.,South China University of Technology | Shen Y.,Shantou Goworld Display Co. | Yao R.-H.,South China University of Technology | Lv Y.-M.,Shantou Goworld Display Co.
Guangdianzi Jiguang/Journal of Optoelectronics Laser | Year: 2013

To obtain a kind of optical switch with strong switch effect, fast response and simple structure, the liquid crystal optical switch based on dichroic dye and polymer orientation is studied. By mixing dichroic dye and polymer into the vertically aligned liquid crystal, and irradiating it by ultraviolet light under a bias voltage to cause the polymer orientation effect, the liquid crystal cells with electrically controlled polarization characteristics were obtained, which were then assembled by the mode of 0°/90° of the polarization angle to realize the liquid crystal optical switch. The insertion loss, extinction ratio and response time of the liquid crystal optical switch were measured and compared. The measuring results show that the insertion loss of the liquid crystal optical switch can be less than 0.6 dB, and the extinction ratio can be higher than 13 dB. And with the method of polymer orientation, the hysteresis of vertically aligned liquid crystal layer can be eliminated with the result of the response time lower than 20 ms. Beyond this, by controlling the bias voltage of the polymer orientation process, the insertion loss or the response time can be further reduced alternatively.


Lin G.,Shantou Goworld Display Co Ltd | Lv Y.-M.,Shantou Goworld Display Co Ltd | Wu Y.-J.,Shantou Goworld Display Co Ltd
Chinese Journal of Liquid Crystals and Displays | Year: 2015

The anti-reflecting structure and its performance of capacitive touch-display modules was studied. An analysis and comparison of several current anti-reflecting technologies of the touch-display modules were made. The results indicated that: for current modules, the inner reflectivity can reduce about 3.8% by the non air-gap technology and to lower than 2% by the super AMOLED and CBD technologies, so the readability under bright circumstance of the corresponding products can be improved effectively. In addition, two improved anti-reflecting structures respectively for LCD and OLED module were also provided. For the LCD module, the front polarizer was just laminated to the rear surface of the touch panel instead of the LCD surface, and the inner reflectivity was reduced to about 4.5%, so its readability under bright circumstance would be improved effectively and its low price would also be kept. For the OLED module, instead of attaching to the OLED itself, the circular polarizer was assembled to an OGS touch panel which would reduce the thickness of the module, and the inner reflectivity of the module was also reduced to about 1.8%.Because there was no need of OCA lamination, the price of this kind of modules would be lower than current super AMOLED modules. © 2015, Science Press. All rights reserved.


Shen Y.,South China University of Technology | Shen Y.,Shantou Goworld Display Co. | Yao R.-H.,South China University of Technology
Gongneng Cailiao/Journal of Functional Materials | Year: 2013

ITiO film was deposited by the methods of room temperature magnetron sputtering and annealed by the XeCl excimer laser in vacuum. The optic, electronic characteristics and phase structure were tested by spectrophotometer, hall-effect testing instrument and X-ray diffractometer respectively. The result show that, irradiation by excimer laser with power of 100-150mJ/cm2 can convert the thin film from the amorphous state to a polymorphic state, activate the doped Ti atoms, and decrease the resistivity of the film. In addition, improve the laser power can reduce the carrier concentration and make the transmittance increase. By the excimer laser annealing of 150mJ/cm2, the resistivity of the ITiO film was 6.93×10-4Ω·cm, and transmittance can reach 88.4%.

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