JP2015145891A - Projection type display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projection type display device that can project a projection image with sufficient brightness from immediately after the start of the projection.SOLUTION: There is provided a projection type display device having a light source and including light source temperature adjustment means for adjusting the temperature of the light source and pre-projection start operation detection means for detecting an operation before the start of projection, and when a result of the detection by the pre-projection start operation detection means is determined as an operation before the start of the projection, the projection type display device starts the adjustment of the temperature of the light source, and when an operation to start projection is not performed within a specified time, ends the adjustment of the temperature of the light source.

Description

  The present invention relates to a projection display device including a light source, and more particularly to activation of the projection display device.

  2. Description of the Related Art Conventionally, there has been known a projection display device that modulates light from a light source in accordance with an input video signal by a light modulation element such as a liquid crystal panel and enlarges and projects an image on a screen or a wall.

  High pressure mercury lamps and metal halide lamps are mainly used as light sources for projection display devices. These light sources take a certain period of time until they become sufficiently bright after the start of lighting, but this is necessary in order to stabilize the temperature of the light sources. In many projection display devices, an image prepared in advance is projected until the brightness of the light source is stabilized, and initialization of the projection display device is performed using this time.

  However, it may take several tens of seconds to stabilize the luminance of the light source, which may take several tens of seconds, which is overwhelmingly long with respect to the initialization inside the projection display device, and the user must wait until the luminance is stabilized. Therefore, it is desired to shorten the time until the luminance of the light source is stabilized.

  Patent Document 1 discloses a projection display device that changes the amount of heat released from a light source in accordance with the temperature of the light source. When the temperature of the light source is high, the amount of heat released from the light source is increased, and when the temperature of the light source is low, such as immediately after startup, the amount of heat released from the light source is decreased, so that the temperature rise after the start of driving the light source Therefore, it is possible to improve the time until the luminance is stabilized.

  Patent Document 2 discloses a projection display device that shortens the time until the brightness is stabilized by controlling the rotational speed of a fan that cools the light source. By cooling the light source cooling fan at a rotational speed that is smaller than the rotational speed at the time of steady driving after the light source starts to be driven, it is possible to improve the time until the brightness is stabilized.

JP 2004-287190 A JP 2007-328005 A

  However, since the prior art disclosed in the above-mentioned patent document is control performed after the projection of the projection display device is started, it is possible to reduce the time required for luminance stabilization, but sufficient luminance immediately after the start of projection. Can not get.

  Accordingly, an object of the present invention is to provide a projection display device that enables a projected image to obtain sufficient luminance immediately after the start of projection.

  In order to achieve the above object, the present invention provides a projection display apparatus having a light source, comprising: a light source temperature adjusting means for adjusting a temperature of the light source; and a pre-projection start operation detecting means for detecting a pre-projection start operation. And when the detection result of the pre-projection start operation detecting means corresponds to the pre-projection start operation, temperature adjustment of the light source is started, and when the projection start operation is not performed within a specified time, The temperature adjustment is terminated.

  According to the present invention, it is possible to provide a projection display device that enables a projected image to obtain sufficient luminance immediately after the start of projection.

System configuration of projection display apparatus in embodiment 1 System configuration of remote control in embodiment 1 Flowchart in the first embodiment Flowchart in the second embodiment

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[Example 1]
FIG. 1 shows a system configuration of a projection display apparatus according to the first embodiment. FIG. 2 shows the system configuration of the remote controller according to the second embodiment.

  A video signal given from an external device such as a PC is first input to the video signal input unit 1. The video signal input unit 1 includes an AD converter that converts an analog signal such as a VGA or Video signal into a digital signal, a receiver that converts a digital signal such as HDMI (registered trademark) or DVI into a predetermined digital signal format, and the like.

  The digital video signal converted by the video signal input unit 1 is sent to the video signal processing unit 2. The video signal processing unit 2 reads the resolution of the input video signal and performs a scaling process for converting the resolution to a resolution required for internal processing, a menu display at the time of button operation, a keystone correction (keystone correction) process, and the like.

  The digital signal processed in the predetermined format by the video signal processing unit 2 is sent to the liquid crystal driving unit 3 and converted into a liquid crystal driving signal for driving the liquid crystal panel in the optical unit 6.

  The ballast 4 is a power source for the light source 5, and the amount of light emitted from the light source 5 is kept constant by performing constant power control. The controller 10 performs lighting control of the light source 5 or dimming processing for adjusting the light emission level of the light source 5.

  The optical unit 6 includes an illumination optical element, a liquid crystal panel, a color separation unit, a color synthesis unit, and the like. The light from the light source 5 has a uniform illuminance distribution by the illumination optical element, and is separated into RGB three colors by the color separation means. The separated light is irradiated to separate liquid crystal panels for RGB, and the transmittance (reflectance) is changed according to the video signal. An image is generated by combining the transmitted light (reflected light) of RGB by the color combining means.

  The image generated by the optical unit 6 is enlarged and projected onto the screen 300 by the projection lens 7.

  The power supply unit 8 converts an AC power input from the outside into a DC power supply, supplies power to each unit in the ballast 4 or the projection display device 100, and also improves a power factor by a PFC circuit.

  The light source temperature adjustment unit 9 is configured by a heater or the like, and preheats the light source 5. In FIG. 1, the light source 5 and the light source temperature adjustment unit 9 are illustrated separately, but may be configured inside the light source 5.

  The control unit 10 includes a CPU such as a microcomputer, and performs overall control of the projection display apparatus 100. For example, on / off control of the light source 5, zoom / focus control of the projection lens 7, power supply control to each circuit, or cooling FAN drive (not shown), etc. is performed by a control signal to the ballast 4. In addition, when the light source 5 is not turned on or when the temperature inside the projection display apparatus 100 is abnormal, the light source 5 is turned off, and the LED is turned on to notify the user of the abnormality. Is going.

  A storage unit 11 is connected to the control unit 10 and is composed of a non-volatile memory such as an EEPROM or a FLASH memory. The setting data of the projection display device 100, the status recording at the time of occurrence of an abnormality (recording of an error code), etc. Used for.

  The user operates the projection display device 100 from the remote controller 200 or the operation panel 13. When an operation is performed with the remote control 200, a signal from the remote control 200 is received by the remote control light receiving unit 12 and data is transmitted to the control unit 10. When an operation is performed on the operation panel 13, the control unit 10 detects which button is pressed. The control unit 10 accepts various operations such as power on / off (projection start, projection end) in accordance with data transmitted from the light receiving sensor 12 or a button pressed on the operation panel 13.

  The acceleration sensor 14 detects an installation state such as an inclination of the projection display device 100. For example, a square projection image can be realized on the projection plane by detecting the tilt angle of the projection display apparatus 100 and applying a keystone correction called keystone correction to the projection image. Alternatively, it can also be detected that it is installed face down, such as when installed on the ceiling.

  The communication unit 15 can control the projection display device 100 by connecting the projection display device 100 to a peripheral device such as a PC, and corresponds to RS232C, USB, or LAN. By performing communication via the communication unit 15, it is possible to control power on / off from other than the remote control 200 and the operation panel 13, and to obtain data inside the projection display device 100 even when no projection is performed. It becomes.

Next, the system configuration of the remote controller 200 shown in FIG. 2 will be described. The remote control 200 includes a remote control control unit 201, an input unit 202, a transmission unit 203, and an operation detection unit 204.
The input unit 202 includes buttons arranged on the remote controller 200. When the user presses a button on the remote controller 200, the remote controller control unit 201 detects which button is pressed. The remote control control unit 201 transmits data corresponding to the pressed button to the projection display device 100 via the transmission unit 203.

  The motion detection unit 204 is configured by an acceleration sensor or the like, and has a function of detecting the movement of the remote controller 200. The remote control unit 201 detects the movement of the remote control 200 in addition to the information on the pressed button, and transmits it to the projection display apparatus 100.

  Next, the operation of the projection display apparatus in Embodiment 1 will be described. FIG. 3 is a flowchart according to the first embodiment.

(Step S101)
First, it is assumed that the user holds the remote control 200 to perform a power-on operation (hereinafter, a projection start operation) when the projection display apparatus 100 is in a standby state (non-projection state). At this time, the remote control unit 201 of the remote control 200 determines that the remote control 200 has moved based on the detection result of the operation detection unit 204 and transmits motion information from the transmission unit 203.

  In the projection display apparatus 100, movement information of the remote control is received by the remote control light receiving unit 12 and sent to the control unit 10.

(Step S102)
When the control unit 10 receives the operation information of the remote controller 200, the control unit 10 determines that the user will perform a projection start operation thereafter, starts driving the light source temperature adjusting unit 9, and preheats the light source 5 in advance.

(Step S103)
The control unit 10 waits for the projection start operation to be performed while continuing the preheating of the light source 5.

(Step S104)
When the user performs a projection start (power-on) operation, the control unit 10 receives the information and starts turning on the light source 5 and other initialization necessary for projection. At this time, since the light source 5 is preheated in advance, the luminance of the light source 5 is stabilized even after lighting, and an image can be projected at a predetermined luminance after the internal initialization.

(Step S105)
If the user does not perform the projection start operation, power is wasted even if the light source 5 continues to be preheated. For this reason, the preheating time is specified, and the projection start operation is waited within the specified time.

(Step S106)
When the projection start operation is not performed within the specified time, the preheating of the light source is finished, and the process shifts to the standby state and finishes.

  Through the above control, the projection display device can detect a pre-projection operation and adjust the temperature of the light source in advance, so that the projected image can obtain sufficient brightness immediately after the start of projection.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

[Example 2]
In the first embodiment, the movement of the remote control is the operation before starting projection. In the second embodiment, a case will be described in which the external power-on is a pre-projection operation.

  The system configuration of the projection display apparatus in the second embodiment is the same as the system configuration of the projection display apparatus in the first embodiment of FIG. Therefore, the description of the system configuration is omitted.

  FIG. 4 is a flowchart according to the second embodiment. From the flowchart in the embodiment 1 of FIG. 3, the motion detection of the remote control in step S101 is changed to power-on in step S201 and internal initialization in step S202.

  Hereinafter, the operation of this embodiment will be described with reference to the flowchart of FIG.

(Step S201)
When AC power is turned on from the outside, the projection display apparatus 100 converts the power to the DC power in the power supply unit 8 as described above, and starts supplying power to the inside.

(Step S202)
When power is supplied to the control unit 10, the control unit 10 itself is first initialized. Thereafter, necessary peripheral circuits (devices) are initialized, and the projection display apparatus 100 is in a state where it can shift to a standby state.

(Step S102)
When the initialization is completed, the control unit 10 determines that the user will subsequently perform a projection start operation, starts driving the light source temperature adjustment unit 9 and preheats the light source 5 in advance.

  The subsequent processing is the same as in the first embodiment, and projection is started if a projection start operation is performed after the external power is turned on. If the projection start operation is not performed within the specified time, the preheating of the light source is terminated and the standby state is entered.

  With the above control, it is determined that the external power is turned on as a pre-projection operation of the projection display device, and the temperature of the light source is adjusted in advance, so that the projected image can obtain sufficient brightness immediately after the start of projection. .

  In the first embodiment, it is possible to adjust the temperature of the light source in advance by determining the movement of the remote controller as the operation before starting projection. In the second embodiment, turning on the external power is the operation before starting the projection.

  There are other possible operations before the start of projection. For example, even after a video signal output device such as a PC or AV device and a projection display device are connected by a cable or the like, it is expected that projection will start thereafter.

  Therefore, the input (connection) of the video signal may be the operation before starting the projection. Further, the input of (or connection to) a communication signal such as RS232C or USB may be a pre-projection operation.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

DESCRIPTION OF SYMBOLS 1 Video signal input part 2 Video signal processing part 3 Liquid crystal drive part 4 Ballast 5 Light source 6 Optical unit 7 Projection lens 8 Power supply part 9 Light source temperature adjustment part 10 Control part 11 Storage part 12 Remote control light-receiving part 13 Operation panel 14 Acceleration sensor 15 Communication Unit 100 projection display device 200 remote control 201 remote control unit 202 input unit 203 transmission unit 204 operation detection unit 300 screen

Claims (5)

A projection display device having a light source,
Light source temperature adjusting means for adjusting the temperature of the light source;
Pre-projection start operation detecting means for detecting a pre-projection start operation is provided,
When the detection result of the pre-projection start operation detecting means corresponds to the pre-projection start operation, the temperature adjustment of the light source is started,
The projection display device characterized in that when the projection start operation is not performed within a specified time, the temperature adjustment of the light source is terminated. Equipped with remote control operation detection means for detecting the movement of the remote control,
The projection display apparatus according to claim 1, wherein the pre-projection start operation detecting unit is the remote control operation detecting unit.   The projection display apparatus according to claim 1, wherein the pre-projection start operation detecting unit detects an external power input.   The projection display apparatus according to claim 1, wherein the pre-projection operation detection unit detects an input of a video signal.   The projection display apparatus according to claim 1, wherein the pre-projection operation detection unit detects an input of a communication signal.