Abstract:
PURPOSE:To always automatically fix the brightness on a display device by outputting an operation signal corresponding to a light intensity signal and driving the display device based on this signal. CONSTITUTION:A display device 1 on which a picture based on an image pickup signal is displayed, an optical sensor 12 which outputs a light intensity signal corresponding to the intensity of inputted light, and a signal processing circuit 28 which outputs the operation signal are provided. A light intensity signal S1 corresponding to the intensity of light L from the display device 1 is outputted by the optical sensor 12, and an operation signal S2 corresponding to this light intensity signal S1 is outputted by the signal processing circuit 28, and the display device 1 is driven based on this operation signal S2. Thus, the brightness on the display device 1 is always fixed by what is called feedback action.
Abstract:
PURPOSE:To make a view finder small-sized and light-weight by arranging a substrate, on which circuit parts are mounted, in the vicinity of the peripheral part of the optical path between a plane display device and an eyepiece lens. CONSTITUTION:A plane display device 21 on which a picture based on an image pickup signal is displayed and an eyepiece lens 28 which magnifies the image displayed on a display face 22 of this display device 21 are provided, and substrates 30 and 31 on which circuit boards are mounted are arranged in the vicinity of the peripheral part of an optical path 25 between the display device 21 and the eyepiece lens 28. Since substrates 30 and 31 are arranged in this manner, the depth of the view finder is reduced. Thus, the view finder is made relatively small-sized and light-weight.
Abstract:
PURPOSE:To always automatically obtain the brightness on a display device as a proper brightness corresponding to the intensity of peripheral light by outputting an operation signal corresponding to a light intensity signal to drive the display device. CONSTITUTION:An optical sensor 27 which outputs a light intensity signal S1 corresponding to the intensity of inputted peripheral light L, a signal processing circuit 28 which outputs an operation signal S2, and a display device 1 where the brightness is adjusted are provided. The light intensity signal S1 corresponding to the intensity of inputted peripheral light L is outputted by the optical sensor 27, and the operation signal S2 corresponding to this light intensity signal S1 is outputted by the signal processing circuit 28, and the display device 1 is driven based on this operation signal S2. Thus, the brightness on the display device 1 is always automatically obtained as a proper brightness corresponding to the intensity of peripheral light.
Abstract:
PURPOSE:To attain miniaturization while shortening the length of the view finder by arranging two mirrors on the light path between a display device and an eyepiece and changing the travelling direction of light to be emitted from the display device so as to be made incident to the eyepiece. CONSTITUTION:At least two mirrors 26 and 27 are arranged on a light path 25 between a display device 21 and an eyepiece 30, and the travelling direction of light to be emitted from a display surface 22 of the display device 21 is changed by these two mirrors 26 and 27 so as to be made incident to the eyepiece 30. Therefore, the line distance from the display surface 22 to the eyepiece 30 can be shortened comparing to the distance when the mirror is not used. Thus, the length of the view finder itself can be shortened and the view finder can be made relatively smaller and light in weight.
Abstract:
PURPOSE:To separate signals in a simple constitution by controlling the gain of the signal for a filter with the use of the control signal of signal regulation for dropout compensation. CONSTITUTION:The signal from a delay line 20 is supplied through a first gain control amplifier 27 to a phase shifter 21, and the signal from a band pass filter 24 is supplied through a second gain control amplifier 28 to an adder 23. Further, the two signals supplied to a switch 8 are supplied to a level comparing circuit 29, and a comparation output is supplied to the amplifiers 27 and 28. Consequently a feedback control is executed for the amplifier 27 so that the levels of the two signals supplied to the switch 8 may be equal, and the amplifier 20 is controlled by the control signal. Then a level fluctuation due to a delay line 20 is eliminated for the signal from the amplifier 28, and an comb line filter can be formed with the use of the signal. Thus, the fluctuation of a filter characteristic caused by a temperature change can be eliminated in a simple constitution.
Abstract:
PROBLEM TO BE SOLVED: To calculate a battery residual usable time corresponding to a current using condition, and to display it on at least one out of two display means. SOLUTION: A video camera 60 is provided with a microcomputer 63 provided with a communication circuit 65 attached with a battery pack 1 for outputting battery residual capacity information, charge/discharge current detection information and battery cell voltage detection information, and for receiving the each information from the battery pack 1, a calculation circuit 66 for calculating a battery residual amount in the present, based on the each received information from the battery pack 1, a display control circuit 67 for generating a display signal and a panel/EFV control circuit 68, a display device 64 having a liquid crystal panel 101 and a view finder (EFV) 102, and a panel opening and closing switch 79 for detecting the opening and closing of the liquid crystal panel 101. The panel/EFV control circuit 68 displays the battery residual usable time on at least one out of the liquid crystal panel 101 and the view finder 102, based on a detection result in the panel opening and closing switch 79. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To enhance cost performance, portability, and safety by introducing chargeability for a plurality of battery packs of different series. SOLUTION: This battery pack charging device includes a battery pack mounting part 3 in which a first terminal part 10 consisting of a plurality of terminals to admit mounting of a first battery pack and a second terminal part 20 consisting of a plurality of terminals to admit mounting of a second battery pack are provided opposing in such a condition as apart at a distance L0 to allow the first battery pack and the second battery pack only in isolated condition to be mounted on the first terminal part 10 and second terminal part 20.
Abstract:
PROBLEM TO BE SOLVED: To display a usable residual time with high precision by receiving the residual capacity information, charge and discharge current detection information, and voltage detection information from a battery pack, and calculating and displaying the battery residual capacity on the basis of each information. SOLUTION: A battery pack 1 for outputting battery residual capacity information, charge and discharge current detection information and battery cell voltage detection information is installed to a video camera 60. The communication circuit 65 of a microcomputer 63 receives each information from the pack 1, and a calculating circuit 66 calculates the present battery residual capacity on the basis of each information received by the circuit 65. A display control circuit 67 generates a display signal according to the calculation result. A display device 64 displays the battery residual capacity according to this display signal. This structure is conformable to the kind of battery cell and a battery cell in the future, the usable residual time can be known, and the precision of display can be also enhanced.
Abstract:
PROBLEM TO BE SOLVED: To make such injections of charging energies possible as to be optimum respectively for all the battery pack with a plurality of different maximum charging voltages and currents each other. SOLUTION: A battery pack 1 has at least a battery cell 20, a non-volatile memory 17 for storing the informations of the maximum charging current and voltage of the battery 20, and a communication circuit 30 for transmitting these informations of the maximum charging current and voltage. Also, a battery charging device 100 has both a communication circuit 102 for receiving the transmitted informations of the maximum charging current and voltage from the battery pack 1 and a microcomputer 101. This microcomputer 101 of the battery charging device 100 senses the voltage on charging the battery cell 20 sent from the battery pack 1, and so changes over the control of the battery pack 1 to a constant-current or constant-voltage charging in response to the sensed voltage as not to exceed the maximum charging current or voltage according to the case of the constant-current or constant-voltage charging.