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Keypad

About: Keypad is a research topic. Over the lifetime, 5719 publications have been published within this topic receiving 79844 citations.


Papers
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Journal ArticleDOI
TL;DR: A brain-computer interface that can help users to input phone numbers based on the steady-state visual evoked potential (SSVEP), which has noninvasive signal recording, little training required for use, and high information transfer rate.
Abstract: This paper presents a brain-computer interface (BCI) that can help users to input phone numbers. The system is based on the steady-state visual evoked potential (SSVEP). Twelve buttons illuminated at different rates were displayed on a computer monitor. The buttons constituted a virtual telephone keypad, representing the ten digits 0-9, BACKSPACE, and ENTER. Users could input phone number by gazing at these buttons. The frequency-coded SSVEP was used to judge which button the user desired. Eight of the thirteen subjects succeeded in ringing the mobile phone using the system. The average transfer rate over all subjects was 27.15 bits/min. The attractive features of the system are noninvasive signal recording, little training required for use, and high information transfer rate. Approaches to improve the performance of the system are discussed.

765 citations

Patent
22 Sep 1992
TL;DR: In this paper, a central data processor, a control unit for each gaming machine within the system, and a user interface which includes a keypad, a card reader and a display.
Abstract: An information and communication system permits communication between gaming machines and a central control system and between a player or operator and a central control system. The system includes a central data processor, a control unit for each gaming machine within the system which is in communication with the central data processor and a user interface which includes a keypad, a card reader and a display. A user interface is secured to each gaming machine and operatively connected to the control unit. The keypad can be used by a player or operator to transmit information to the central data processor. The control unit can be used to identify special players and transmits messages, including promotional messages, for display. The control unit includes memory which contains personality data for the gaming machine and can be used to transmit the personality data from the user interface to its memory. The control unit can accept personality data from a card inserted into the card reader and can be enabled by a personal identification number entered on the keypad. The system provides multiple features including automated maintenance, game accounting, security, player tracking, event tracking, employee/player interaction from the game to the central data processor, cashless operation of gaming machines, reserving gaming machines and other functions.

751 citations

Patent
31 Jul 2002
TL;DR: In this paper, a wireless data input system has one or more switches (SW) on a keypad or the like and a number of individually addressable RFID tags (A, B, C).
Abstract: A wireless data input system has one or more switches (SW) on a keypad or the like and a number of individually addressable RFID tags (A, B, C). Each switch operates to enable a corresponding subset of the individually addressable RFID transponder tags, such that a unique permutation of tag codes recognized by a RFID reader identifies actuation of each particular switch or key.

718 citations

Patent
07 Feb 1992
TL;DR: In this paper, the authors describe an automated casino gaming system with a central game controller to which a number of automated writer stations are connected, each of which has a keypad with two colored LEDs mounted under each key.
Abstract: An automated casino gaming system includes a central game controller to which a number of automated writer stations are connected. In the keno playing embodiment disclosed, the automated writer stations each have a keypad with two colored LEDs mounted under each key. To play a game, patrons first insert a card into the automated writer station to identify their account maintained on the central game controller. The patron then enters a wager on the automated writer station. As the patron picks the desired numbers, LEDs of one color associated with the keys for the numbers will light. The patron presses a PLAY key to transmit an electronic "ticket" to the central game controller. When the period for entering wagers has ended, the central game controller requests a random draw from a separate, secure random number generator. The central game controller credits the accounts of winning players according to a preconfigured pay table before transmitting the results to the automated writer stations, where the draw is displayed on the keypad one number at a time using a second color of LED. The system can be configured with a cutoff level, with wins above the cutoff level being flagged for handpayment or for the automatic generation of tax forms. Cashier workstations connected to the central game controller implement a total cash management system which tracks all transactions and determines the amount of cash that should be at each cashier station.

561 citations

Patent
21 Apr 2008
TL;DR: In this paper, specific ambient and user behaviour sensing systems and methods are presented to improve friendliness and usability of electronic handheld devices, in particular cellular phones, PDAs, multimedia players and similar.
Abstract: Specific ambient and user behaviour sensing systems and methods are presented to improve friendliness and usability of electronic handheld devices, in particular cellular phones, PDAs, multimedia players and similar. The improvements and special functions include following components: a. The keypad is locked/unlocked (disabled/enabled) and/or the display activated based on the device inclination relative to its longitudinal and/or lateral axes. b. The keypad is locked if objects are detected above the display (for example the boundary of a bag or pursue). c. The keypad is locked/unlocked (disabled/enabled) and/or the display activated based on electric field displacement or bio-field sensing systems recognizing the user hand in any position behind the handheld device. d. The electric response signal generated by an electric field through the user hand in contact with a receiver plate is used to identify the user and in negative case lock the device. e. Connection with incoming calls is automatically opened as soon as a hand is detected behind the device and the device is put close to the ear (proximity sensor). f. The profile (ring-tone mode, volume and silent mode) can be changed just putting the device in a specific verse (upside up or upside down). g. Has a lateral curved touchpad with tactile markings over more surfaces to control a mouse pointer/cursor or selection with the thumb finger.

553 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202357
202288
202130
202075
201978
201882