Dissertations / Theses on the topic 'Photo panel'

Магістерська дисертація містить: сторінок – 111, рисунків – 41 , таблиць – 21, графічна частина на 6 листах А1. Метою роботи є проектування автономної фотоелектричної насосної станції разом із теоретичним дослідженням та математичним моделюванням у програмному середовищі Matlab з використанням пакету Simulink. Дослідити працездатність системи при зміні вхідної напруги від джерела живлення. Розглянути вплив опромінення та температури на роботу фотопанелі. Провести аналіз динамічних та статичних характеристик системи, отриманих при моделюванні насосної установки. В роботі проведено аналітичний огляд різновидів, принципу роботи, переваг та недоліків автономних джерел енергії. Розглянуто приклади промислового та транспортного застосування, особливості керування та моделювання автономних енергосистем. Виконано вибір відцентрового насосу виходячи з вихідних даних напору та продуктивності, розраховано його потужність та обрано привідний асинхронний двигун, розроблено перетворювальний пристрій. Наведено математичні моделі асинхронного двигуна, фотопанелі. Розглянуті алгоритми керування електромеханічною системою.
The master's dissertation contains: pages - 111, figures - 41, tables - 21, graphic part on 6 sheets of A1. The aim of the work is to design an autonomous photovoltaic pumping station together with theoretical research and mathematical modeling in the Matlab software environment using the Simulink package. Investigate the performance of the system when changing the input voltage from the power supply. Consider the influence of radiation and temperature on the operation of the photo panel. To analyze the dynamic and static characteristics of the system obtained during the simulation of the pumping unit. An analytical review of the types, principle of operation, advantages and disadvantages of autonomous energy sources is carried out. Examples of industrial and transport application, features of control and modeling of autonomous power systems are considered. The choice of the centrifugal pump is made proceeding from initial data of pressure and productivity, its power is calculated and the driving asynchronous motor is chosen, the converter device is developed. Mathematical models of induction motor, photopanel are given. Algorithms of control of electromechanical system are considered.

This term paper deals about history, principle and use of photovoltaic panel. It describes their stucture and constantly improving properties of these panels. It outlines their gradual generational evolution from beginning to present. Then it describes the various systems involved on – grid and off – grid. It also describes and compares the photovoltaic panels and inverters from different global manufacturer. The end of this work deals about conditions of photovoltaic in the Czech republic and about Hady photovoltaic incubator, which belongs to the company Energ servis a.s. It presents a comparison of different local and the analysis of the impact of shading for the achievement of the photovoltaic panel. It makes mathematic models for calculation of the spacing range and calculation the power loss in a specific shade.

Dissertation focuses on the verification of construction family houses made of concrete shell block with internal thermal insulation system. The construction technology is transferred to the Czech Republic from France. The work focuses on building envelope. The suitability of implementation is assessed on the basis of verification selected thermal technical requirements placed on building envelope. Requirements are specified by legislation in force in the ČR. The verification was performed by using software simulations and measurements on realized buildings. Critical areas of construction technology were identified on the basis software simulations and measurements on site. It was suggested solution, in which critical areas comply the thermal technical requirements. The building envelope was checked also using the thermography imaging on site. Continuous measurement of interior temperature was used to evaluate thermal comfort in the room. In the completed buildings was tested airtightness of the building envelope, which revealed other critical areas of the building envelope. Critical areas are necessary to solve with sufficient care. The economic cost of implementing each variants of exterior walls made of concrete shell block with internal thermal insulation were compared with the economic costs of implementing external walls made of burnt clay hollow blocks and made of burnt clay hollow blocks with external thermal insulation system ETICS. Subsequently, the economic return was calculated for individual variants of external walls made of concrete shell blocks with internal thermal insulation. From the environmental viewpoint was made comparison of production greenhouse gas CO2 and SO2 (cause acid rains) during the life cycle of the individual variations of exterior walls made of concrete shell blocks with system of internal thermal insulation, exterior walls made of burnt clay hollow blocks and burnt clay hollow blocks with external thermal insulation syst

碩士
國立中央大學
電機工程研究所碩士在職專班
96
The Resistor or Capacitor touch screen have become popular in displays for industrial and amusing applications. We provide new method to integrate photo sensor in display panel. The touch function work or not base on touch or un-touch that will change brightness value, through the sensing by photo sensor and A/D converter, we can obtain different digital signal variation, and processing by image algorithm calculating, we can obtain the result for X/Y coordinates. Because the sensing function base on brightness change, so the shadow will cause function error for photo sensor touch panel and no function in very dark of environment. We will provide the new dynamic threshold and VGS voltage control method and algorithm processing that can solve these issues. Use the sensing value by photo sensor and adjust the threshold value suitably and photo sensor VGS voltage that effectives solve function error cause by shadow and the touch no function cause brightness change issues. Keywords : touch panel, photo sensor, dynamic threshold, photo sensor voltage control.

碩士
國立臺灣大學
電機工程學研究所
96
Touch Panel Integration on Glass is a new proposal for recent display technology. The way to produce is to add photo-sensor structure in TFT Pixel Array, then to integrate touch panel function into 15 inch a-Si TFT-LCD panel, and to enable the display panel with Light-Pen Input Display or Finger Sensing Input Display function. We embedded a-Si photo sensors every 4 lines of gate lines and data lines into 15 inch LCD panel with resolution of XGA 1024x768 to let the sensor line resolution to reach 256x192. Either use fingers to block the light or use the light pen to put the strong light on the touch panel, we allow the touch panel create movements. When use fingers to block the ambient light it will have analog signal output, then through ADC to transfer analog signal to digital signal which is acceptable by computers. FPGA provides timing chart to analog board, through SPI interface to C8051, then through USB convey to PC, and the software touch control drivers in the computer will integrate all the components and edit them to calculate, finally show the position that users been touched on the screen. The biggest advantage of photo-sensor touch panel is to lower the cost, improve the transmittance, long lasting, reduce the thickness, and improve the calibration problems of capacitive touch panel.

碩士
國立清華大學
產業研發碩士積體電路設計專班
95
In a LCD panel that has equipped with pixel photo sensors for image capture, the ambient light intensity detection is critical for the read-out circuit. In this study, for simulation purpose, we use CMOS optical sensors as detecting element and their spatial filtering signal as an indicating factor for improving the read-out circuit efficiency. In the further study, TFT array will be used for similar investigation. This thesis aims at developing an efficient method for backlight light intensity detection in touch panel. By catching a fixed backlight light source frequency we can detect the touch on the panel even working in the dark. This new touch approach will change the way we use and control the mobile phones and panel. The detecting circuits for the touch panel are integrated directly onto the screen and this makes products lighter and smaller with added portability and convenience.

碩士
國立清華大學
電子工程研究所
95
Recently, for interactive purposes, detecting devices are been developed on the existing TFT-LCD panels. Many of them are based on resistive, capacitive or inductive touch technology. All these solutions require externally added components or one more layer of screen, which add the cost and degrade the optical performance. In our study, we use a novel approach by building an additional TFT photo-diode in the existing LCD display pixel as a detecting element. This diode can be embedded during the panel manufacturing process and incurring no additional cost. After the post-product evaluation, this diode also shows no impediment to the light efficiency. In this way, by using the photo-diode array and by going with a designed detecting circuit, the imaging signal that appears on the panel can then be read out. In this study we investigate a readout circuit that can be used to distinguish the noise that comes from environment and the signal that comes from our remote controlled light-pen on hand. By the circuit we can get the required results of lower power consumption and smaller integrated chip area in comparison with using conventional ADC. In addition to the advantage of low power supply it has high output voltage swing and is suitable for implementation in advanced submicron CMOS technologies. The circuit proposed above is design in a TSMC 0.35um process and verified by HSPICE program.

碩士
國立清華大學
產業研發碩士積體電路設計專班
95
Recently, for interactive purposes, detecting devices are been developed on the existing TFT-LCD panels. Many of them are based on resistive, capacitive or inductive touch technology. All these solutions require externally added components or one more layer of screen, which add the cost and degrade the optical performance. In our study, we use a novel approach by building an additional TFT photo-diode in the existing LCD display pixel as a detecting element. This diode can be embedded during the panel manufacturing process and incurring no additional cost. After the post-product evaluation, this diode also shows no impediment to the light efficiency. In this way, by using the photo-diode array and by going with a designed detecting circuit, the imaging signal that appears on the panel can then be read out. In this study we investigate a binary read out circuit that can be used to distinguish an ON/OFF signal that comes from a light beam spot shone on a photo detector array equipped in a LCD panel. In this structure, because the back light source can cause error during the signal read out period, here we used the correlated double sample (CDS) method to reduce the noise. By this way we can trace the moving light spot locus on the panel and transfer the coordinate data to the following processor for further processing. Besides, we used the hysteresis comparator as an analog to binary signal converter. This comparator circuit has designed with a bistable characteristic that has an adjustable threshold, so that the other noise influence such as thermal noise and dark current that comes from the LCD panel can be minimized. The parameters that influence the threshold variations and loop of hysteresis are observed. The circuit proposed above is design in a TSMC 0.35um process and verified by HSPICE program.

碩士
逢甲大學
工業工程與系統管理學研究所
99
Due to the technology of touch panel and related coordinate process has been developed maturely, many manufacturers apply touching technology on their new developed products, like touch panel wisdom mobile. Applying multiple manners to improve the ratio of qualified products on touch panel production can increase capacity of qualified product output, ensure high ratio for on time delivery also can assist the company saving high cost from defeat. This research applies a case study on a touch panel manufacturer by using QIT (Qualify Improvement Team) to do an improvement on touch panel operation process. The result of this research shows that the qualified ratio has increased 5.6% to 6.9% and has reduced the defective ratio 6.6% to 13.7%. Reaches higher satisfaction ranks by customers.

碩士
國立清華大學
產業研發碩士積體電路設計專班
95
In recent years, the LCD (liquid crystal display) panel technology has made great progress and gradually replaces the traditional CRT one. By some special design the panel can be embedded with photo-sensitive elements and becomes light input device too. In this study we investigate the possibility of using the light-pen to replace the conventional mouse functions. Light-pen has advantages over mouse by its non-contact and remote control characteristics, especially in pointing. But with single switch in light-pen, some functions need different approaches for reaching the same goal. Some software programs have been implemented to demonstrate the feasibilities.

碩士
國立交通大學
電子研究所
106
In the recent years, as the popularity and development of smartphone and tablet PC, the touch panel is the current trend now. Humanized operation interfaces will gradually replace the conventional keyboards, so we hope to go forward to the medium and large-sized display touch panel. Currently, the technology of touch is focused on two methods including resistive and capacitive. The characteristic of resistive touch is through the difference of voltage to fix the pressing position of the panel. Although the cost is low, after the long-termed operation, the sensitivity of pressed position by people will decrease. The capacitive touch is according to the difference of induced capacitor from finger and amplifying the sensing signal by the comparator. The technology and cost of capacitive touch are both high, but the accuracy is better than the resistive touch. According to the analysis report about the market of touch panel from NPD Display Search shows that the market for small-sized smartphone tends to saturate. Except for small-sized cell phone, tablets below 10-inch are more popular now. Many factories develops touch panels above 10-inch positively. Also, the bidirectional human-computer operation interface is expected to have varieties of developments including AI and appliance which hope to bring more convenience to people’s life. Therefore, medium and large-sized touch panels will play an important role in the future. Take cost and sensitivity into account, optical touch will become the mainstream in the future. The optical touch is to integrate sensing device into the panel. Because the sensing dots are in the pixel, we can improve the sensibility and accuracy. Also, the process technology won’t need to have too much adjustment. That is to say, it can show the complete picture without adding not only conductivity layer to achieve multi-touch but also the sensing layer. Therefore, the cost of the technology is in the dominant. In this thesis, we propose the integrated panel with photo sensing touch by using amorphous silicon thin film transistor (a-Si TFT). The panel includes the photo sensing pixel circuit which can sense light illumination by the characteristic of photo leakage from device, the gate driver on array which can avoid the crosstalk of display and sense simultaneously, and also it integrates the signals of sensing circuits. In addition, the sensing readout circuit is to amplify the difference from sensing pixel and designed by a-Si TFT to attain lower cost. The proposed circuit can satisfy both low cost and high sensitivity and have the potential to apply to large-sized smart television and electronic whiteboard. We expect to develop human-computer interactive remote touch to create the new life vision.

碩士
長庚大學
電機工程學系
103
Full cover past two years, due to progress and technology, the yield has been upgraded to the mass production of high technology to fit the whole saturation Monitor LCD volume requirements, the scope of the original amount of the liquid crystal (LC marin) authentication methods are inadequate use. This thesis adding auxiliary columnar spacers density and reduce the amount of the liquid crystal panel to improve the liquid crystal display full color unevenness bonding defects, and research pillar spacers for low-density bubble surrounding color unevenness (Mura) and vacuum test uneven color effect. The results when the main pillar spacers density by 0.1% and the auxiliary columnar spacers density of 2% design time, in the liquid crystal trickle-injection method (One Drop filling; ODF) to obtain the maximum amount of liquid crystal dropping range, while improving Full fitting color unevenness and bubble low temperature does not occur.

碩士
國立中央大學
環境工程研究所在職專班
106
Coagulation followed by chemical oxidation were employed to remove color. The effects of pH, reaction time, coagulant as well polymer dosage and NaOCl were examined. The results showed that removal efficiencies of chemical oxygen demand (COD) and color by coagulation were 9.14% and 62.33%, respectively. Decolorizaiton was 100% after addition of NaOCl. Coagulation can effectively remove resin and color particles, thus, it can reduce the color. NaOCl could then destruct the color functional groups and also oxidize come organic compounds. The removal efficiency of COD by NaOCl was 34.61%.

碩士
長庚大學
化工與材料工程研究所
98
Nowadays the photo spacer has completely replaced traditional ball spacer in LCD panel industries. By utilizing the newly developed process, not only the cost and production processes are saved, but also the risks of yield loss or scrapped panel products are reduced. It is known that, in the LCD panel, total liquid crystal weight is relative to the height of photo spacer. If the photo spacer is more higher, it means there should be more liquid crystal used in panel. Therefore, it would cause panel scrapped if the photo spacer height is inconsistent during the process operation. To improve the automation of the LCD panel process, a feedback mechanism for self regulating the weight of liquid crystal by the deviation of photo spacer height is studied in this work. The precise liquid crystal weight needed for different photo spacer height is first verified in this study. Then one can set up the related table between liquid crystal weight and photo spacer height in LCD dropping machine. Finally, the results of cell gap experiments demonstrate that the correct liquid crystal weight can be automatically regulated according the measured deviation of the photo spacer height.

The innovative design of flat panel volume computed tomography (CT) systems has recently led to the emergence of a wide spectrum of new applications for both diagnostic and interventional purposes, such as ultra-high resolution bone imaging, image guided interventions, dynamic CT angiography, and interventional neuroradiology. Most of these applications require low X-ray dose to limit potential harm to the patient. One of the main challenges of low dose imaging is to maintain a quantum noise limited system to achieve the highest possible signal to noise ratio (SNR) at a given dose. One potential method to achieve a quantum noise limited system is to employ a high gain detector. Current flat panel CT technology is based on indirect conversion detectors that contain a scintillator and hydrogenated amorphous silicon (a-Si:H) p-i-n photodetectors which have a gain below unity and require a specialized p-layer. In this thesis, an alternative detector to the p-i-n photodetector, which can achieve gain above unity and thus aid in achieving quantum noise limited systems is investigated for large area flat panel imaging. The proposed detector is based on amorphous selenium (a-Se). Amorphous selenium is the most highly developed photoconductor for large area direct conversion X-ray imaging and is still the only commercially available large area direct conversion flat panel X-ray detector. However, the use of a-Se for indirect conversion imaging has not been significantly explored. Amorphous selenium has field dependent mobility and conversion efficiency, which increase with increasing electric field. It is also the only large area compatible avalanche-capable material; a property that was discovered more than 30 years ago. This unique property could be leveraged to provide the gain necessary for low dose medical imaging applications. The only current commercial avalanche capable a-Se optical detector uses electron beam readout in vacuum, which is not large area compatible and makes integration with pixelated readout electronics challenging. The detector structure proposed in this research seeks to address the challenges associated with integration of an avalanche capable a-Se detector with large area X-ray imager. One important aspect in the development of a-Se avalanche detectors is reducing the dark current and preventing a-Se breakdown as the electric field across the device is increased. A high dark current reduces the dynamic range of the detector, it increases the noise level, and it can lead to crystallization of the detector due to joule heating. To overcome the dark current problem, different blocking layers that allow for integration with large area flat panel imagers were investigated. Experimental results from fabricated devices provided the basis for the choice of the most suitable blocking layer. Two device structures are proposed using the selected blocking layer, a vertical structure and a lateral structure, each having associated benefits and drawbacks. It was shown that introducing a polyimide blocking layer brought down the dark current more than four orders of magnitude at high electric fields and does not deteriorate the charge transport properties of the detectors. The polyimide blocking layer also greatly minimizes physical stress related crystallization in a-Se improving reliability. Gain above unity was observed in the vertical structure and the initiation of impact ionization was verified by performing time-of-flight experiments. Although impact ionization was not verified in the lateral structure, this device structure was found to be highly sensitive to ultraviolet light due to the absence of a top contact layer. Devices were fabricated on several different substrates, including a CMOS substrate, to demonstrate their integration compatibility with large area readout electronics. The exhibited performance of the vertical device structure demonstrates that it is a suitable alternative to the p-i-n photodetector for low dose imaging applications.

博士
中原大學
生物醫學工程研究所
100
By using the feature of radio-pharmaceutical tracking, molecular imaging modalities offer bio-functional information of living tissues. Compare to those modalities offering anatomical images, molecular imaging offers more specific diagnosis and earlier detections to the lesions. Applying small cameras with high-resolution capability to image specific target on human body at a close position to gain high quality images for diagnosis, has been showing its potential on clinical use. The purpose of this study is to develop a flat panel gamma camera and to study the required technology. The proposed camera is requested to satisfy the following three specifications to show its practicality of in-vivo imaging. First, the proposed camera should be capable of processing dual-modality imaging applications, i.e. positron and single-photon imaging. Second, a good resolution performance (better than 3 mm) should be shown. Third, a successive imaging area larger than 80×80 mm2 is required. In this study, the architecture of crystal array composed of needle like elements coupling onto PSPMTs was chosen to be the development basis. Five terms of work were processed to achieve the objectives. The first term is to evaluate the imaging performances, manipulation, and availability of six scintillators. According to the test results, LYSO was chosen for processing the following terms of work. The second term is to build a base imaging unit (an imaging detector based on a single PSPMT) for technology validating and evaluate its performance. The results showed that the proposed imaging unit is capable of offering promising performances (pixel width < 0.8 mm and energy resolution < 15%) for the dual-modality imaging. The third term is to study the influences of the continuous light guide on degradations of imaging performances, and to evaluate the effectiveness of light guide thickness to make the imaging area successive. According to the experimental results, 2mm-thick light guide was chosen to develop the proposed dual-modality camera. In the fourth term of work, a camera meeting the purpose of this study and with the specifications obtained from the previous terms of work applied was built. The effective imaging area was extended successively to 89×89 mm3. The results showed that the proposed camera offers outstanding performances for positron (about 2 mm resolution) and single-photon imaging (sub-millimeter achievable with pin-hole collimation). The last term is to evaluate the influence of the camera’s intrinsic radiations on single-photon imaging. The results showed that the proposed camera is capable of offering correct and quality images in single-photon imaging applications. In this study, by basic studies on scintillation materials and continuous light-guide influences, a dual-modality camera for positron and single-photon imaging was completed. It is shown that outstanding performances and a practical size of imaging area were achieved, therefore, the objectives and technical requests of this study are satisfied.