Painel tátil

Painel tátil de um laptop.
Painel tátil em um celular.

Um painel tátil (Touchpad em Inglês) é um dispositivo sensível ao toque que traduz a posição de pressão do toque para o sistema operacional na tela. É utilizado principalmente em Notebooks para substituir o mouse, mas também pode ser encontrado em telemóveis/celulares, em reprodutores de média portáteis/tocadores de mídia portáteis, em PDAs e em videogames.[1]

Atualmente, os painéis táteis identificam vetores x e y, usando a capacitância proporcionada pela pele dos dedos (ou um objeto condutor de eletricidade) na sua superfície. Então, o microprocessador identifica o valor das cargas e sabe quais células foram pressionadas. Para gerar um movimento, ele identifica quais as primeiras e quais as últimas células pressionadas, gerando linhas retas em intervalos de milissegundos. Essas linhas geradas a cada milissegundo, juntas, formam o movimento do cursor.

Os modelos antigos utilizavam sensores de pressão. Porém, este sistema não é mais utilizado nos atuais painéis táteis (como nos dos portáteis, principalmente), por não possuírem a mesma qualidade e durabilidade das novas tecnologias.

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Referências

  1. ↑ https://www.uol.com.br/start/ultimas-noticias/2013/02/22/do-touchpad-ao-botao-share-descubra-todos-os-segredos-do-controle-do-ps4.htm

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