Black Friday - Projectors

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  • Black Friday discounts in Czechia, Slovakia and Austria, from 30th October to 30th November 2025.
  • Black Friday discounts in Germany and Hungary, from 30th October to 1st December 2025.
  • The list of products currently available in the Campaign can be found on this website below (“Goods”).
  • Alza reserves the right to limit, for certain Goods, the number of items each customer may purchase during the Campaign.
  • The available stock of some products is distributed among consumers in the Czech Republic, Slovakia, Austria, Hungary, and other countries served by Alza, based on earlier order times. This does not apply to specific regional/language versions of the products.
  • Alza, as a retailer, organises the Campaign primarily to serve the needs of individual consumers and therefore reserves the right to refuse purchases made with the intent of resale.
  • Alza reserves the right to modify the selection of discounted Goods during the Campaign.
  • An item is considered purchased at the discounted Campaign price only when Alza confirms the Buyer’s order and the Buyer pays for the Goods (placing Goods in the shopping cart does not constitute a completed purchase). If the Buyer chooses cash on delivery as the payment method, it is sufficient to submit the order to Alza; however, the discount applies only once the cash on delivery payment has been made.
  • On the product page of each item participating in the Black Friday campaign, we display, in accordance with applicable regulations, the lowest price available in our e-shop in the 30 days preceding the start date of the Black Friday promotion, as well as the discounted price provided within the framework of the Black Friday promotion, according to the specifications in Article VII of our GTC.
  • The discount provided within the framework of the Campaign cannot be combined with other discounts available on the alza.cz, alza.sk, alza.at, alza.de or alza.hu website.
  • Goods participating in the Campaign cannot be purchased by phone or fax, but exclusively online.
  • For details, please read the terms and conditions of the Campaign carefully, which you can find here.
  • Alza reserves the right to change the terms and conditions of the campaign.
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Overhead projectors

Black Friday - Projectors - additional info

Projectors are excellent presentation tools as well as perfect home cinema devices. They can be easily connected to DVD players and computers, so you can sit back, munch popcorn, and enjoy great cinematic experiences in the comfort of your own home.

Projectors typically have many input signal options, featuring composite, S-Video, VGA or HDMI. You can project on plain white walls, but to get the best performance, choose from the range of professional projection screens available. Depending on the way in which they process the internal video signal, projectors are either LCD or DLP. Although these technologies are different, and LCD projectors used to be considered better for projecting data from computers while DLP models were ideal for screening films, today both technologies are practically equivalent.

LCD Projectors
The light source in LCD projectors passes through three primary colour filters. Each then passes into one of three LCD panels through a permeable layer. Finally, all three colours are combined again and projected through an optical device onto a screen, where they are displayed as a complete picture. These devices are both lightweight and easy to maintain.

DLP Projectors
DLP projectors work with DMD chips and use a large number of microscopic mirrors, with each mirror representing one pixel. The image is again broken down into the three primary colours (red, blue, green) and then passes through the micro mirrors and lens before being projected onto a screen.

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