场致发光电源电路

场致发光灯作为一种冷光源,现如今被大量的运用在LCD显示器的背光源。此次研究,对场致发光电源电路进行具体分析,明确各项结构以及工作特性,并通过具体实验,分析电源电路方面的优势以及优化路径;并将两种场致发光电源电路作为研究对象,分析两者具体优势与驱动电源状况。     

场致发光电源电路

场致发光灯作为一种冷光源,现如今被大量的运用在LCD显示器的背光源。此次研究,对场致发光电源电路进行具体分析,明确各项结构以及工作特性,并通过具体实验,分析电源电路方面的优势以及优化路径;并将两种场致发光电源电路作为研究对象,分析两者具体优势与驱动电源状况。     

一种新型高压场致发光驱动电路的设计

提出了一种横向高压敏感功率器件的结构，采用SENSE技术制作末端功率器件。该器件是一种新型敏感器件，利用其版图结构及在结终端技术中的特殊结构，可使场致发光(EL)的驱动、智能开关电源等的保护功能更加可靠。在EL控制和驱动电路中，采用一种新型误差放大电路和PWM电路，给出了电路模型参数，并设计了一种具有极低电磁干扰和高稳定度的新型EL电路。     

一种新型显示器：分层优化薄膜场致发光显示屏

一、什么是场致发光显示屏？场致发光是在电场的作用下，直接将电能转换为光能的发光现象。实现这种发光的材料很多。利用这种材料制成的场致显示屏，将不需要真空，成为全固体化的发光器件，而且是平板显示器件。这种平板场致发光显示屏，按激发电源不同，有交流和直流两种。场致发光器是本世纪３０年代发明的。到目前为止，已经发展了三代。第一代是粉末场致发光器；第二代是夹层结构单色场致发光器，其发明人是日本的猪口敏夫；第三代是分层优化彩色薄膜场致发光器，其发明人是徐叙容教授。因为它是显示器中主动发光的后起之秀，目前世界…     

基于AT89S51的场致发射显示器驱动电路研究

介绍了场致电子发射显示器原理,与大多数显示器一样,场致电子发射显示器的整机系统是由显示屏和驱动电路两部分组成,驱动电路主要以单片机、译码器、寄存器等数字芯片组成的,用以实现对矩阵显示的行、列逻辑控制,并给出逻辑电路图。通过倍压整流的方式设计了用以驱动场致电子发射显示器的高压电源电路,最后采用汇编语言实现了对逻辑电路控制的软件设计。     

平板显示器在军用小型监控设备中的选型与应用

介绍了发光二极管显示器、液晶显示器、场致发光显示器、有机发光二极管显示器的工作原理、特性、优缺点及应用，通过对各类平板显示器的性能进行比较，给电路设计师优选显示器提供了一定选型参考。     

新型CNT-FED驱动电路的研究

碳纳米管已经作为电子源广泛应用于场致发射显示器件中。本文讨论了场致发射显示器的工作特性．以及CNTFED对驱动电路的要求。根据脉宽调制（PWM，Pulse Width Modulation）额基本原理，本文提出了新型的灰度实现方式。该方法灰度等级实现方法简单，大大降低了扫描信号的频率要求。     

场致发光屏谐振逆变器的设计

文章阐述了场致发光屏的等效电路和等效参数的测量方法。提出了谐振型逆变器的概念，分析了工作原理和设计方法，探讨了为提高效率而采取的措施。使场致发光屏逆变器的性能和效率得到显著提高。     

彩电关机消亮点电路原理与故障检修

彩电在关机后,行、场扫描电路立即停止工作,但显像管灯丝余热犹存,阳极高压(因显像管玻壳相当于一个高压电容)仍在,故显像管发光条件仍具备,就会在荧屏中心出现亮点/彩斑。为此,彩电均设置了关机后消亮点电路。电路原理分析消亮点电路有两种形式:一种是截止型消亮点电路,其基本原理是:在关机后让显像管阴、栅极之间持续保持高电压,使电子束截止,从而达到消亮点目的;第二种是中和型消亮点电路,其原理是:在关机瞬间,让显像管阴、栅极之间电压最小,使阴极电子大量发射,确保在行、场扫描结束的同时,电子束把阳极高压中和掉,从而达到消亮点之目的…     

CCFL的亮度特性及其驱动电路分析

背光组件中主要的发光器件冷阴极荧光灯(CCFL)具有特定的电气特性，通过实验研究了CCFL的与发光亮度和发光效率有关的特性，定性地分析了CCFL的自激振荡电路的工作原理。并在此基础上，对逆变振荡电路进行了定量的理论分析，为设计高效率驱动电路提供参考依据。     

Direct-current electroluminescence in zinc sulphide: State of the art

A review is made of the characteristics of direct-current electroluminescent (dc EL) displays based on powders of zinc sulfide doped with manganese and copper. These panels show yellow emission with efficiency of about 0.1 percent watt per watt and can be operated under both continuous and pulsed operation. The preparation of the panels is described and the brightness-voltage-current relationships are given. Under continuous operation, the brightness at 100 V falls from 100 fL to 50 fL in several thousand hours, while under pulsed operation little deterioration is noted in this time. So far, 36-character (each consisting of 35 dots) displays have been prepared. It is suggested that a large variety of useful displays, both analog and digital, or combinations of these, can be produced dc EL panels based on zinc sulphide.     

Passive Matrix Organic Electroluminescent Display for 3G Cellular Phone

The major features of the display technologies for 3G cellular phone are reviewed.The comparison between their potential candidates for 3G cellular phone is given ,and a detailed discussion is made on passive matrix organic electroluminescent display technology.A novel method to improve display contrast ratio is presented.Finally several 3G phone set prototypes with OLED display panels are given as well as the market forecast.     

功能薄膜在薄膜电致发光显示技术中的应用

薄膜电致发光(thin film electroluminescence,简称TFEL或EL)显示器件,具有全固化、主动发光、重量轻、视角大、反应速度快、使用温度范围广等诸多优点,有着广泛的应用前景。TFEL器件的结构中包括了多种功能薄膜的应用,器件性能的好坏决定于各种功能薄膜的合理选择及其制备工艺。本文对TFEL器件中的功能薄膜进行了介绍。     

Display-device research and development in Japan

Current work on display devices in Japan is surveyed. Work on plasma display panels includes several methods for producing gray scale on ac-driven bistable panels, a technique for moving the display on an ac-driven panel, and new types of plasma display panels. Development on several types of alphanumeric displays, including both new and older types, is summarized. Work on light-emitting diodes includes new fabrication techniques and new types of devices. The liquid-crystal work described includes addressing techniques, color modulators, and light-addressed light valves. A new cathodochromic display tube, a high-frequency oscilloscope tube, and an electroluminescent display panel are mentioned.     

3D Shape-Morphing Display Enabled by Electrothermally Responsive,Stiffness-Tunable Liquid Metal Platform with Stretchable Electroluminescent Device

3D displays are of great interest as next-generation displays by providing intensified realism of 3D visual information and haptic perception. However, challenges lie in implementing 3D displays due to the limitation of conventional display manufacturing technologies that restrict the dimensional scaling of their forms beyond the 2D layout. Furthermore, on account of the inherent static mechanical properties of constituent materials, the current display form factors can hardly achieve robust and complex 3D structures, thereby hindering their diversity in morphologies and applications. Herein, a versatile shape-morphing display is presented that can reconfigure its shape into various complex 3D structures through electrothermal operation and firmly maintain its morphed states without power consumption. To achieve this, a shape-morphing platform, which is composed of a low melting point alloy (LMPA)-graphene nanoplatelets (GNPs)-elastomer composite, is integrated with a stretchable electroluminescent (EL) device. The LMPA in the composite, the key material for variable stiffness, imparts shape memory property and forms conductive pathways with GNPs enabling rapid electrothermal actuation. The stretchable EL device provides reliable illumination in 3D shape implementations. Experimental studies and proof-of-concept demonstrations show the potential of the shape-morphing display, opening new opportunities for 3D art displays, transformative wearable electronics, and visio-tactile automotive interfaces.     

Operation and power dissipation of thin-film transistor-controlled electroluminescent displays

The operation of the thin-film transistor-controlled electroluminescent (TFT-EL) display panel was analyzed and the power dissipation under different conditions calculated. A hybrid electronic multiplier was used to measure the dissipation of individual electroluminescent (EL) cells, TFT-EL elements, and TFT-EL panels. The results of these measurements and the luminous efficiency of the EL material are presented.     

Power source for electroluminescent panels

Requirements for the operation mode of power sources of flat electroluminescent panels are formulated. A block diagram of the power source for electroluminescent panels is developed. The effect of the current waveform on parameters of the electroluminescent panel is studied.     

Complementary high-voltage technology based on n-type CdSe:In andp-type Ge:Cu thin-film transistors

A breakthrough in the complementary thin-film transistor technology allows the production of voltage level shifters that raise a 5-V input span to an 80-V output span. The static and dynamic behavior of these level shifters is discussed. The present technology is applicable for the integration of driver circuits on the substrate of electroluminescent displays     

Stretchable High-Resolution User-Interactive Synesthesia Displays for Visual–Acoustic Encryption

Multifunctional displays, which have various functions in single-device systems without external circuits, are actively investigated as future human–machine interfaces owing to performability of unprecedented functions in compact design. However, their application is limited to visualize the mechanical/electrical signals in light. Herein, stretchable high-resolution multicolor synesthesia display, which can generate synchronized sound and light as input/output sources, is presented by transfer-printing. Transfer-printed emissive composite leads to display with enhanced optical performance and fine sound pressure level. Owing to inherent stretchability of the device, the synesthesia display can stably operate under static and dynamic deformation without distortion in sound relative to the input waveform. User-interactive synesthesia displays are demonstrated for visual−acoustic encryption, which facilitate advanced encryption, as well as multiplex quick response code that bridges multiple domains with a single device. This approach provides new directions for multifunctional displays, with potential applications in reinforced authentication.     

Voltage‐Dependent Multicolor Electroluminescent Device Based on Halide Perovskite and Chalcogenide Quantum‐Dots Emitters

Electroluminescent devices based on metal halide perovskites have attracted extensive attention owing to their high external quantum efficiency, excellent color purity, and inexpensive solution process. So far, extensive efforts have been made to improve the efficiency of the monochromatic perovskite light‐emitting diodes (LEDs). However, multicolor perovskite‐based LEDs are seldom studied. Here, an individual device capable of multicolor emission in response to the passage of external electric bias is demonstrated. With the rational design of the energy band alignment and control of the carrier transport property, color‐tunable electroluminescent devices based on inorganic halide perovskite and chalcogenide quantum‐dots are fabricated with a wide color tuning range, high color reversibility, and ultrafast color switching. The mechanism of chromaticity tuning is investigated and is explained by the shift of the exciton recombination zone with the driving voltage. The presented work will impact scientific communities by encouraging the manufacture of cost‐effective, high‐resolution, and full‐color displays and human‐centric lighting.