KR0124611B1 - Method & apparatus for drive control of projector/camcorder - Google Patents

Abstract

An apparatus and method for controlling a driving of a projector/camcorder are disclosed. In the apparatus, a LCD assembly section includes a LCD panel and lamp, and a cooling fan. A power supply section supplies a power source to a camcorder. A main switch cuts off or supplies the power source outputted from the power supply section. A LCD signal processor is connected to the main switch. A fan driver is connected to the LCD signal processor. A lamp driver is connected to a supplementary switch. A control section controls operations of the camcorder and supplementary switch.

Description

Projector / Camcorder Drive Control System and Method

Figure 1 (a) is a block diagram of a projector / camcorder drive control device.

(b) is a flowchart showing a conventional projector / camcorder drive control method.

2 is a block diagram of a projector / camcorder drive control unit of the present invention.

3 is a flowchart showing a projector / camcorder drive control method of the present invention.

* Explanation of symbols for main parts of the drawings

10: lamp brightness detection unit 11: LCD temperature detection unit

12: microcomputer 14: power supply

15: main SW16: secondary auxiliary SW

17: first auxiliary SW18: PJT / V / F signal processing unit

19: fan driver 20: lamp driver

21 LCD housing 22 Lens

23 fan 24 LCD unit

25 lamp

TECHNICAL FIELD The present invention relates to a projector / camcorder, and more particularly, to a projector / camcorder drive control apparatus and method for optimizing an operation state of each functional unit when performing a projector function to improve device characteristics.

In general, a projector / camcorder includes a camera unit for photographing a subject to produce an electric composite video signal, and a VCR unit and a camera unit or a VCR for recording an image signal from the camera unit on a VCR tape or reproducing a video signal recorded on a VCR tape. And a view finder for displaying a predetermined image on an internal display element by an image signal from a negative portion.

In the above projector / camcorder, when the view find function of the camcorder is selected by the user, a lamp used as a light source generates light of a weak intensity suitable for view find behind the LCD unit, and the generated light is collected through the condenser lens. The back of the wealth will be illuminated.

At this time, the user can see the image displayed on the LCD through the focus lens installed in front of the LCD.

In addition, when the user selects the project function, the rear panel of the LCD unit emits light of strong intensity and displays the image of the LCD unit on the front screen.

As described above, in order to perform both the view find and the project function, the light source should be adjustable from the light of low intensity used as the backlight for the view find to the light of strong intensity to be used for the project.

In addition, a fan must be provided to cool the appliance to a suitable temperature by dissipating heat generated by the high intensity light for the project.

However, in the conventional projector / camcorder as described above, as shown in FIG. 1, which is a flowchart showing a conventional projector / camcorder driving control method, the following is followed by the control of the light source according to the function selection and the driving of the fan for cooling the device. I had the same problem.

The lamp turns ON and OFF with the same operation according to the ON / OFF operation of the projector / camcorder function, but the screen of the projector is displayed for a long time (approximately 3 to 4 seconds) so that the user does not see the screen in the initial ON state. There was a problem that the lamp life was shortened and frequently replaced when the machine was mistaken due to a malfunction of the machine and repeated on / off operation was performed.After the completion of the projector / camcorder function, the fan was operated for a certain time. The heat generated by the LCD and the heat generated by the strong light source was cooled, but there was a problem in that the fan could not be driven when the main power was turned off, so that the device did not have sufficient cooling effect.

The present invention has been made to solve the problems of the conventional general projector / camcorder drive control, the projector / camcorder drive to improve the characteristics of the device by optimizing the operating state of each functional unit when performing the projector / camcorder function It is an object of the present invention to provide a control apparatus and method.

In order to achieve the above object, there is provided a control apparatus for controlling a key running time and controlling a fan driving time during power on / off.

Projector / camcorder drive control method of the present invention for achieving the above object is to display a light source and a fan for cooling the heat generated from the light source to control the amount of light to perform the view and project functions A projector / camcorder having an LCD unit, comprising: delaying the performance of the projector / camcorder function for a predetermined time when the system is powered on; delaying the projector / camcorder function until a predetermined light source brightness is detected; And performing a projector / camcorder function when the above-described light source luminance is detected, and driving the fan until the temperature of the LCD is cooled below a predetermined level when the system is powered off.

Hereinafter, the projector / camcorder drive control method of the present invention with reference to the accompanying drawings in detail as follows.

2 is a block diagram of a projector / camcorder drive control unit of the present invention, and FIG. 3 is a flowchart showing a projector / camcorder drive control method of the present invention.

First, as shown in FIG. 2, the configuration of the projector / camcorder drive control unit of the present invention is supplied to the power supply unit 14 and the power supply unit 14 for supplying power for operating each system that performs the function of the projector / camcorder. Projector / camcorder according to the switch operation of the main SW 15, the second auxiliary SW 16, the first auxiliary SW 17, and the main SW 15, which are connected and operate the switch under the control of the microcomputer 12. PJT / V / F signal processing unit 8, which is a main system that performs a function, drives a fan that cools the device by dissipating heat generated from a lamp used as a light source according to a switch operation of the second auxiliary SW 16. When the fan drive unit 19 and the first auxiliary SW 17 switch operation, the predetermined image according to the image signal is displayed on the LCD 24 panel embedded in the LCD assembly 21 when the view find function is performed. Also, when performing the project function, the LCD A lamp driver 20 for driving a lamp that provides light of strong intensity and light of intensity so that an image is projected on an external screen, a lamp brightness detector 10 for detecting the brightness of the lamp, and a temperature for detecting the temperature of the LCD unit The LCD section includes a temperature detecting section 11 and a display section 13 which displays a functional state of each operation by the control of the microcomputer 12.

Detailed operation description of FIG. 2 is as follows.

First, when a user inputs a main power key (not shown), the control unit 12 receives a key signal to turn on the main power switch 15 and the auxiliary switches 16 and 17.

At this time, the lamp 25 by the on of the first auxiliary switch 17 becomes brighter and it takes time for several seconds until the full brightness.

At this time, the control unit is configured such that the system does not operate even if the user inputs an off key or other key until the lamp 25 becomes the projector possible brightness.

The method in which the system does not operate by the microcomputer 12 for a predetermined time may be configured such that other keys do not operate for a predetermined time after power-on key input.

According to another embodiment of the present invention, it is possible to determine whether projection is possible by detecting the brightness (brightness) of the lamp 25. As shown in FIG. 2, the microcomputer detects the brightness level as a brightness detection sensor around the lamp 25. If the predetermined brightness level is higher, the microcomputer 12 may control another operation by a key input.

The means for controlling the power-on key operation time in such a projector / camcorder device is not limited to the above embodiments, and various implementations can be realized in the current technology level.

When the user powers off after the projection, the power output to the motor of the fan driver 19 may be supplied for a predetermined time to effectively cool the LCD 24 in the LCD assembly 21.

This realization means can be realized by the power switch control in the microcomputer 12, the detailed configuration can be effectively controlled at the time of power-off by controlling the switching time of the second auxiliary switch (16).

In addition, the temperature sensor 11 detecting the LCD temperature inputs the current temperature to the microcomputer 12, and the microcomputer 12 can control the first auxiliary switch 16 according to the current temperature.

Referring to the control method by the projector / camcorder drive control unit of the present invention having the configuration as described above is as follows.

Projector having a light source 25 with adjustable light quantity to perform view find and projector functions, a fan 23 for cooling heat generated from the light source, and an LCD assembly 21 for displaying an image signal. In the camcorder, when the main SW 15, the first and second sub-SWs 17 and 16 are turned on and the system is powered on, the projector / camcorder function is stored for the reference setting time stored in the microcomputer 12. Will delay execution.

This detailed description shows that when the user presses the power-on key as shown in FIG. 3, the main first and second switches are turned on and are supplied to the power source.

At this time, when the user selects the projection function, the amount of light of the lamp 25 is increased until the projection is possible under the control of the microcomputer 12.

At this time, if the user inputs another key, the reference setting time, which is the time required for the preset lamp light amount to be projectable light amount, is compared with the input time of the projection mode key, and the key is increased. When the execution of the operation is stopped and the reference set time is small, the key operation is executed to allow the system to operate in a state where complete projection is possible.

In general, when the viewfinder function of the camcorder uses weak intensity light as the backlight light source, the temperature caused by the heat generated from the LCD unit is lower than the temperature of the LCD unit generated by the strong intensity light when the projector function is performed.

Therefore, the above system operation is mainly used when selecting a projector function.

The projector / camcorder drive control method of the present invention controlled by the above method does not operate the main system (projector / camcorder) because the main power is turned on and the main system (projector / camcorder) does not operate during the reference setting time or until the brightness of the lamp has a predetermined level or more. To prevent waste, and extend the life of the lamp.

In addition, even after the operation of the main system (projector / camcorder) is finished, the temperature of the LCD unit is detected and compared to cool down to a predetermined temperature, thereby having a sufficient cooling effect of the device.

Claims (4)

A camcorder device having a projector function, comprising: an LCD assembly including an LCD panel, a lamp, and a cooling fan, a power supply for supplying power to the device, a main switch for interrupting / supplying power output from the power supply, and an auxiliary Switch, the fan driver 19 and the lamp driver connected to the LCD signal processor connected to the main switch and the auxiliary switch, respectively, when the power on key input does not operate the device even if a different key is input for a predetermined time or when the power off input Projector / camcorder drive control device comprising a control unit for controlling the auxiliary switch for supplying power to the fan drive unit / off for a predetermined time after the power off. The projector according to claim 1, wherein the control unit receives a luminance level detected by a luminance detection sensor installed around a lamp in the LCD assembly when the power is turned on, and sets the operation suppression time of another key signal in comparison with a predetermined reference signal. Camcorder drive controller. The method of claim 1, wherein the control unit receives a signal detected by a temperature sensor installed around the LCD panel in the LCD assembly when the power off and compares with the predetermined reference signal to control the off time of the second auxiliary switch, characterized in that Projector Camcorder Drive Control. In the camcorder unit with the projector function, the projector mode selection step is to increase the lamp light quantity to the projectable brightness by selecting the projector mode, and to set the preset reference time and the projector mode selection time when another key is input after the projector mode is selected. A comparison step of comparing, and a projector / camcorder drive control method operating in a control step of controlling to stop a key operation for a reference set time in the comparing step.