Display device
AssigneeCitizen Watch Co., Ltd.
InventorsSase Masahiro, Igarashi Kiyotaka, Takashi Osa, Noritoshi Suzuki
Life of this patent
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Abstract
A hand display device having a hand driven by a pulse motor in which graduations or symbols representing plural types of functions to be indicated by the hand are arranged so as to display the mutal positions on a dial, and by selecting one of the functions, the hand stays at a position of graduation or symbol corresponding to a selected function for a relatively longer time than that corresponding to unselected function to display functional display selectively.
Claims6
A hand display device with a hand for changeably displaying one display value of a first function and another display value of a second function, a dial having said hand attached therereto and graduations or symbols for said first function and second fucntion, respectively, and a driving means for said hand, said driving means comprising a first function signal generating circuit for generating a first function signal, and a second function signal generating circuit for generating a second function signal, a mode control circuit for generating a mode switching signal for changing from one display value of said first function to another display value of said second function, a drive control circuit for selectively producing mutually different drive control signals under a first function signal when said mode switching signal is in a first state and under a second function signal when said mode switching signal is in a second state, a drive circuit for producing a drive signal under said drive control signal, and a pulse motor for receiving said drive signal from said drive circuit and interlocking with said hand, said graduations or symbols for said first function and said graduations or symbols for said second function on said dial being arranged substantially not to occupy the same positions, and an occurrence time interval of said drive signal being controlled so that said hand stays at a position of a graduation or symbol corresponding to a selected function among said graduations or symbols for a relatively longer time than at a position of a graduation or symbol corresponding to an unselected function and so that said hand passes a position of a graduation or symbol corresponding to an unselected function in a relatively shorter time than a position of a graduation or symbol corresponding to a selected function.
A hand display device with a hand for changeably displaying one display value of a first function and another display value of a second function, a dial having said hand attached thereto and graduations or symbols for a first function and second function respectively, and a driving means for said hand,
- said driving means comprising:
- a mode control circuit for generating a mode switching signal in response to a change from one display value of said first function to another display value of second function,
- a drive control circuit for producing a first function signal when said mode switching signal is in a first state and a second function signal when said mode switching signal is in a second state,
- a drive circuit for producing a drive signal under one signal which is being produced of said first and second function signals, and
- a pulse motor for receiving said drive signal from said drive circuit and interlocking with said hand,
- said graduations or symbols for said first function and said graduations or symbols for said second function on said dial being arranged substantially not to occupy said same positions, and
- said drive control circuit having a function for controlling an occurrence interval of said drive signal so that said hand stays at a position of a graduation or symbol corresponding to a selected function among said graduations or symbols for a relatively longer time than at position of a graduation or symbol corresponding to an unselected function and so that said hand passes a position of a graduation or symbol corresponding to an unselected function in a relatively shorter time than a position of a graduation or symbol corresponding to a selected function.
Dependencies are inferred from the claim text.