This paper presents the principle of raising response speed of LCD by overdrive technology,and optimizes the method of establishing a overdrive lookup table for LCD.
We can get the Bragg reflect wavelength according toλ0=np,n=(2no+ne)/3 from the relation between the reflect wavelength and pitch of cholesteric LC,and the λ0 is a fixed value,p=1/(c×HTP).The chiral dopant with different chiral power is added to the same C5 nematic phase LC and we can get the cholesteric LC with the same pitch through adjusting the added concentration of the chiral dopant.The conclusion is that the spectrum bandwidth is different though the reflect wavelength is the same from the DMS-501 testing data.The result is that the spectrum bandwidth is wide when the chiral dopant with high HTP value was added into the nematic LC,contrarily the spectrum bandwidth is narrow when the chiral dopant with low HTP value was added into the nematic LC.
The reflectance of Transparent Magenta Plastic objects in each wavelength were measured with an UV-VIS spectrophotometer.Selecting the D65 illuminant and CIE1964 Supplementary standard colorimetric tristimulus values,using CIE1976LAB Color-Difference Formula and CIEDE2000 Color-Difference Formula,compared with the human eye's visual effect,it can be found that CIEDE2000 Color-Difference Formula can be better reflected the colorchange,and it is in betteragreement with the human's vision characteristics.
The photoluminescence of organic devices of type I quantum well structure consisting of 8-hydroxyq-uinoline aluminum(Alq3) and 2-(4-biphenylyl)-5(4-tert-butyl-phenyl)-1,3,4-oxadiazole(PBD) under reverse bias modulation have been studied.Photoluminescence spectrum of these devices is mainly about Alq3.The photoluminescence of quenching of degree of different cycle number of well structure devices,under reverse electric field modulation are different.
This paper introduces implementation of edge-lit LCD TV with dynamic backlight control function,and focused on solving the flicker issue that arises in the process.
The core device of the the solid volumetric true 3D display system is digital micromirror D4100 projector system.Based on the the D4100 video driver characteristics and interface requirements,taking FPGA as a core,receiving and processing DVI data and transmitting for D4100 display system.Including the DVI video decoder,video output processing,timing control,and LVDS transmitter.Through the actualdesign of the circuit board and joint commissioning with the D4100,achieving 1024×768 projection display.
This paper presents the basic structure of transparent silver mesh electrode.The transparency and sheet resistance were predicable based on a theoretical model.The methods of fabrication of the transparent silver electrodes were summarized.The advantages and disadvantages of these technologies were analyzed.The wettability of silver inks on PET was investigated.The transparent silver mesh electrode was prepared by gravure printing and its transparency and sheet resistance were measured.The silver electrodes could be the next generation of transparent electrode applied in devices such as OLED,touch screen,organic solar cells etc.
The LED Display is usually used in the situation of head-up watching.The luminous intensity distribution in the upward 50%power angle is wasted.This paper presents a new asymmetric LAMP design concept that part of the luminous intensity in the upward 50%power angle can be transformed to the downward.After implementing the new design,the upward 50%power angle is reduced to 20° and the downward 50%power angle is increased to 40°.The luminous intensity of asymmetric LAMP in the downward 50%power angle increase 30% than the common LAMP.At the same time,the consistency of the light-matching also improved significantly,and the color bias of the display can be decreased.
Pixel defects especially bright pixel defects happen among the TFT-LCD(thin film transistor-liquid crystal display)productive process because of the complex manufacturing process.Normal repair method is to destroy the pixel's circuit by laser to make it dark.Recently a new repair method of covering the pixel using black matrix granulation by laser is developed.But its success ratio is lower than expected.With the theory of different colors absorbing light energy and some experiment,the repair success ratio is sharply raised to nearly 100%by Red、 Green、Blue pixel respectively using different laser power instead of the same power.
全彩LED显示屏通常是仰视的应用环境,上视角范围内的亮度没有被有效利用.本论文提出了一种将LAMP器件上视角范围内的亮度,向下视角范围转移的设计方法.通过设计得到透镜型面数据,制作透镜模具,封装成成品灯珠并进行测试,非对称LAMP器件上视角20°,下视角40°.下视角增大后,在同等条件下,非对称器件与常规器件相比,下视角可视范围内亮度提升了30％.同时,配光的一致性也获得了明显提升,降低了色偏差.由于上视角减小,也减少了上视角范围内的亮度造成的光污染.
Based on the structure and luminescence mechanism of OLED,this paper Introduces the OLED driving circuits,discusses some problems of the various driving circuits,and puts forward their applicability.
The current mainstream technologies of the liquid crystal display(LCD),plasma display panels(PDP) and organic light emitting display(OLED) all exist the problem of low color reproduction,which cannot satisfy with the real digital high-definition display requirements.Compared with current mainstream displays,a laser display has the incomparable advantages,which will become the mainstream technology.It detailedly introduces the principle,characteristics of laser display technology,the technology progress of domestic and international laser display,the existing problems and so on.Finally,it points out that the laser display may lead the fourth technological revolution in display.
Pixel defects especially bright pixel defects happen among the TFT-LCD(thin film transistor-liquid crystal display)productive process because of the complex manufacturing process.Normal repair method is to destroy the pixel's circuit by laser to make it dark.Recently a new repair method of covering the pixel using black matrix granulation by laser is developed.But its success ratio is lower than expected.With the theory of different colors absorbing light energy and some experiment,the repair success ratio is sharply raised to nearly 100%by Red、 Green、Blue pixel respectively using different laser power instead of the same power.
According to development of middle and small size LCD panel,It is necessary that enterprise should has High-performance Manufacturing Execution System(MES).Radio Frequency Identification(RFID) was introduced in material transfer for auto transfer,it reduces production server loader for control production information and transfer rule.In order to avoid file server affecting production,inspection result inspection file are sent to MES with two ways,it fulfills inspection data and operation integration.In order to improve the user answer speed and lose production database server loader,Report system get data from engineer database.Its application in TFT-LCD manufacturer line showed that both production efficiency and quality were greatly improved.
In order to Measure the Birefringence of nematic Liquid Crystal,a wedge method was proposed according to the principle of fringes of equal thickness.The ordianry light(o light) and the extraordinary light(e light) were achieved by switching direction of the wedge,and the number of fringes on both sides of air and liquid crystal were counted to determine the refraction index of o light and e light.respectively.The result inicated that the approach was simple,convenient and avoiding the influence of many factors with error under control.
The excellence property of polyimide and applications of polyimide film in liquid crystal display have been introduced in the article.Applications of polyimide film in alignment film,the driving IC package,flexible connection,color filter of LCD have been discussed especially.The required of polyimide film structure,property and technology is difference for difference kinds of aspects.It has been discussed in detail in the following article.
Transparent displays are suitable for building windows,automobile windows and the shop window and many kinds of applications.In addition to the original transparent display function,it still has the possible development potential as information display,thus the market focus.But at present main manufacturers only focus on how to improve light transmittance of the transparent liquid crystal panel,and there is little research on its chromaticity characteristic.In the practical application,the display has high light transmittance,but the color of the goods behind the display is not accurate,the application effect is not ideal.In this paper,we adopt the company production 31.5 UV2A transparent liquid crystal panel and study the chromaticity coordinates deviation of different color light when they go through the transparent display,and the effect on chromaticity.
This paper outlines the AMOLED display principle and its advantages,and discusses the core technology of preparating AMOLED display in detail,including evaporation,TFT backplane technology and packaging,etc.The impact of these technologies on the performance and life of AMOLED display was mainly analyzed,and these key technologies were demonstrated comparatively.Finally,the further research to improve the performance of AMOLED display was prospected.
