This master thesis is focused on designing a concept of a biodynamic tunable white luminaire for the interior capable of producing user defined output or simulating the conditions of natural exterior lighting. The thesis describes the physiological basis of human sensitivity to lighting and the consequences, as well as the principles of semiconductor radiation sources. Finally, it deals with methods of sensing the lighting conditions and describing the design and functions of the system elements and final implementation.

This diploma thesis focuses on the czech manufacturer Lucis, s.r.o. in the field of innovative activities. The company manufactures luminaires which combine technical and design aspects using current modern technologies and, at the same time places great emphasis on high-quality hand-made custom production. The aim of this diploma thesis is to present proposals for innovative activities that will increase the productivity of the company Lucis and its economic results. Proposals for innovation activities are built on the basis of an analysis of the current state of the company and on the basis of a research that was executed on a topic of customer service satisfaction. KLÍČOVÁ SLOVA Inovace, mezinárodní obchod, svítidla, design KEYWORDS Innovation, international

The thesis deals with analysis of the public lighting system from the point of view of light sources and luminaries. It focuses on the specifics of the lighting systems such as lighting for pedestrian crossings or decorative lighting. It analyzes the energy consumption depending on daylight and how it manifests a shift sunrise and sunset on the consumption of electricity. The work clarifies how the model can be simplified sunrise, sunset for the entire Czech Republic. Based on the distribution of municipalities with population over 10,000 and modeling of sunrise and sunset calculation is carried out power consumption of lighting systems and compared to the total consumption of the Czech Republic. Simplification is an estimate of the consumption of electricity to villages to 10 000 people on the basis of the estimate, the final consumption of electricity for public lighting for the entire Czech Republic.

This master thesis is a design study of LED interior light units. Aim of the study is to design set of three luminaire types – office table light, standard lamp and a pendant luminaire. All three lights are following the same design. Curve is the main shape for this light set. LED, called light source of the future, is supposed to be the only light source at all three units. LEDs were chosen as the contemporary most efficient and modern light source. Use of LEDs has many positive economical and social aspects. Use of innovative design, most recent technologies and modern shapes brings new inspiration and variety into current interior light world. Development of light systems study is mapping light units history from the beginning into presence. It brings interesting look into interior light history.

The Light-emitting diodes (LEDs) are rapidly emerging as the dominant light source given their high luminous efficacy, long lift span, and thanks to the newly enacted efficiency standards in favor of the more environmentally-friendly LED technology. The LED lighting market is expected to reach USD 105.66 billion by 2025. As such, the lighting industry requires LED drivers, which essentially are power converters, with high efficiency, wide input/output range, low cost, small form factor, and great performance in power factor, and luminance flicker. These requirements raise new challenges beyond the traditional power converter topologies. On the other hand, the development and improvement of new device technologies such as printed thin-film capacitors and integrated high voltage/power devices opens up many new opportunities for mitigating such challenges using innovative circuit design techniques and solutions. Almost all electric products needs certain power delivery, regulation or conversion circuits to meet the optimized operation conditions. Designing a high performance power converter is a real challenge given the market’s increasing requirements on energy efficiency, size, cost, form factor, EMI performance, human health impact, and so on. The design of a LED driver system covers from high voltage AC/DC and DC/DC power converters, to high frequency low voltage digital controllers, to power factor correction (PFC) and EMI filtering techniques, and to safety solutions such as galvanic isolation. In this thesis, we study design challenges and present corresponding solutions to realize highly integrated and high performance LED drivers combining switched-capacitor and resonant converters, applying re-configurable multi-level circuit topology, utilizing sigma delta modulation, and exploring capacitive galvanic isolation. A hybrid switched-capacitor-resonant (HSCR) LED driver based on a stackable switched-capacitor (SC) converter IC rated for 15 to 20 W applications. Bulky transformers have been replaced with a SC ladder to perform high-efficiency voltage step-down conversion; an L-C resonant output network provides almost lossless current regulation and demonstrates the potential of capacitive galvanic isolation. The integrated SC modules can be stacked in the voltage domain to handle a large range of input voltage ranges that largely exceed the voltage limitation of the medium-voltage-rated 120 V silicon technology. The LED driver demonstrates > 91% efficiency over a rectified input DC voltage range from 160 VDC to 180 VDC with two stacked ICs; using a stack of four ICs > 89.6% efficiency is demonstrated over an input range from 320 VDC to 360 VDC . The LED driver can dim its output power to around 10% of the rated power while maintaining >70% efficiency with a PWM controlled clock gating circuit. Next, the design of AC main rectifier and inverter front end with sigma delta modulation is described. The proposed circuits features a pair of sigma delta controlled multilevel converters. The first is a multilevel rectifier responsible for PFC and dimming. The second is a bidirectional multilevel inverter used to cancel AC power ripple from the DC bus. The system also contains an output stage that powers the LEDs with DC and provides for galvanic isolation. Its functional performance indicates that integrated multilevel converters are a viable topology for lighting and other similar applications.

En esta investigación se plantea los elementos del visual merchandising interno en relación a la intención de compra en tiendas por departamento en la categoría de ropa para niños, puesto que en los últimos años esta técnica ha ido cambiando a través del tiempo generando nuevas experiencias a los consumidores. Esta investigación busca evaluar las variables del visual merchandising interno de este punto de venta en esa categoría con la finalidad de determinar si presentaban una relación con la intención de compra o no. La metodología de investigación expuesta es correlacional. El estudio estuvo divido en dos etapas, la primera con enfoque cualitativo donde se presenta los resultados de las entrevistas a profundidad al público objetivo primario padres de familia y al público objetivo secundario a los expertos en el tema. En segundo enfoque es cuantitativo donde se desarrolla una encuesta y se corrobora con lo investigado anteriormente. El resultado de la investigación muestra que todas las variables del visual merchandising interno presenta una correlación con la intención de compra. Sin embargo, cuatro de estas variables iluminación, color, presentación de productos y decoración presentan una correlación media. Mientras que, el diseño de tienda presenta una correlación débil por lo cual no se podría concluir con certeza cuál es la correlación real entre esta variable. / In this research, the elements of visual internal merchandising are proposed in relation to the intention to buy in department stores in the category of children's clothing, since in recent years this technique has been changing over time generating new experiences for consumers. This research seeks to evaluate the internal visual merchandising variables of this point of sale in that category in order to determine if they had a relationship with the intention of purchase or not. The research methodology presented is correlational. The study was divided into two stages, the first with a qualitative approach where the results of the in-depth interviews are presented to the primary target audience, parents and the secondary target audience to experts in the field. In the second approach, it is quantitative where a survey is developed and corroborated with what was previously investigated. The result of the investigation shows that all the variables of the visual internal merchandising have a correlation with the intention of purchase. However, four of these variables lighting, color, product presentation and decoration have a medium correlation. Meanwhile, the store design has a weak correlation, so it cannot be concluded with certainty what the real correlation between this variable is. / Trabajo de investigación

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I designed the lighting for William Shakespeare's complex piece, The Merchant of Venice, which was produced by the UMass Amherst Theater Department. In this thesis paper, I will discuss the creative process from start to finish, including relevant lighting paperwork and production photographs.