JP4479203B2 - Image projection apparatus and image projection method - Google Patents

Description

  The present invention relates to an image projection apparatus and an image projection method suitable for position setting at the time of power-on.

  In general, when projecting an image on a screen using a projector device or the like, the projector device is turned on, waits for a few minutes for the light source lamp to reach a predetermined brightness, and when the light source lamp reaches a predetermined brightness. Then, the projector apparatus position, zoom position, elevation angle adjustment by adjusting the height of the projector apparatus, keystone correction for image distortion, focus adjustment, and the like are performed so that the image is projected to a desired position on the screen.

  In addition, it is necessary to appropriately adjust the amount of projection light, adjust the color of the image, and various settings of external devices such as a connected notebook computer.

As described above, as a technique for facilitating the installation of a projector apparatus that requires time and labor, there is a technique in which a light emitting device for instructing the installation position by light irradiation is provided on the screen side. (For example, Patent Document 1)
JP-A-7-270913

  However, in the above-mentioned Patent Document 1, it is necessary to equip a light-emitting device in a fixed portion on the screen side in advance, and the projector device is the first time except when the projector device is regularly installed at the same installation position. If it is installed in the place, it is not useful at all.

  The present invention has been made in view of the above circumstances, and the object of the present invention is not dependent on the time during which the luminance of a predetermined brightness is obtained after the light source lamp is energized, and is shorter. An object of the present invention is to provide an image projection apparatus and an image projection method capable of completing installation including various adjustments over time.

According to the first aspect of the present invention, a display element that displays an image according to an input image signal, a light source that irradiates light to the display element, and light from the light source is reflected or transmitted by the display element. A projection means for projecting the obtained light image; a self-luminous element incorporated in the vicinity of the image display area of the display element; and a projection range display means for displaying the projection range of the projection means by lighting thereof; and the light source And a control means for lighting the projection range display means according to the power-on state and the detection result of the detection means .

  According to a second aspect of the present invention, in the first aspect of the invention, the control means drives the projection range display means to turn on until a predetermined time elapses after the power is turned on.

According to a third aspect of the present invention, in the first aspect of the invention, the detecting means detects a temperature or light emission luminance of the light source, and the control means is based on a detection signal from the detecting means after power is turned on. The projection range display means is driven to turn on until the light source reaches a predetermined temperature or light emission luminance.

  According to a fourth aspect of the present invention, in the first aspect of the present invention, the projection unit includes a zoom mechanism that varies a projection angle of view, and the projection range display unit is interlocked with a projection field angle of the projection unit. Then, the projection range is displayed.

According to a fifth aspect of the present invention, there is provided a projection step of projecting a light image by reflecting or transmitting light from a light source to a display element that displays an image according to an input image signal, and the vicinity of the image display area of the display element A projection range display step for displaying a projection range in the projection step by turning on a self-light emitting element incorporated in the light source, a detection step for detecting a light emission luminance state of the light source, a power-on state, and the detection step And a control step of controlling lighting driving of the self-luminous element in the projection range display step according to the detection result .

  According to the first aspect of the present invention, since the projection range is displayed immediately after the power is turned on by a self-luminous element such as an LED incorporated in the display element separately from the lamp of the light source, the light source lamp is energized. The installation including various adjustments can be completed in a shorter period of time without depending on the time when the brightness of predetermined brightness can be obtained.

  According to the invention described in claim 2, in addition to the operation of the invention described in claim 1, when the lamp of the light source reaches a predetermined brightness, the self-light emitting element can be automatically turned off.

  According to the invention described in claim 3, in addition to the action of the invention described in claim 1, the light source lamp is accurately detected from its temperature or light emission luminance when the light source lamp has a predetermined brightness, and then the light emitting element is It can be automatically turned off.

  According to the invention described in claim 4, in addition to the operation of the invention described in claim 1, even when the projection lens system has a zoom mechanism that can arbitrarily change the projection angle of view, the projection angle of view can be reduced. In conjunction with this, it is possible to always display an accurate projection range.

  According to the fifth aspect of the present invention, since the projection range is displayed immediately after the power is turned on by a self-luminous element such as an LED incorporated in the display element separately from the lamp of the light source, the light source lamp is energized. The installation including various adjustments can be completed in a shorter period of time without depending on the time when the brightness of predetermined brightness can be obtained.

  Hereinafter, an embodiment in which the present invention is applied to a projector apparatus will be described with reference to the drawings.

  FIG. 1 shows a functional configuration of an electronic circuit of the projector apparatus 10 according to the embodiment. In the figure, image signals of various standards input from the input / output connector unit 11 are unified into image signals of a predetermined format by the image conversion unit 13 via the input / output interface (I / F) 12 and the system bus SB. Later, it is sent to the display encoder 14.

  The display encoder 14 develops and stores the transmitted image signal in the video RAM 15, generates a video signal from the stored contents of the video RAM 15, and outputs the video signal to the display driving unit 16.

  The display driving unit 16 drives and displays the projection unit 17 at an appropriate frame rate, for example, 30 [frames / second] corresponding to the transmitted image signal, and projects and displays an image on a screen (not shown).

  The control unit 18 controls all the operations of the above circuits. The control unit 18 is composed of a CPU, a ROM that permanently stores an operation program executed by the CPU including a projection range display process when power is turned on, which will be described later, and a RAM that is used as a work memory. The projection operation is executed by directly receiving key operation signals of various keys provided in the key input unit 19.

The control unit 18 is also connected with an Ir receiving unit 20, an indicator unit 21, and an audio processing unit 22 via a system bus SB.
The Ir receiving unit 20 receives infrared modulated light from a remote controller (not shown) for the projector device 10, demodulates a key code signal corresponding to the key operated by the remote controller, and sends it to the key input unit 19. To do.

  The indicator unit 21 appropriately lights / flashes various operating states of the projector device 10, for example, power on / off and standby states, temperature (of the light source lamp), etc., by the LED and its driving circuit.

The sound processing unit 22 includes a sound source circuit such as a PCM sound source, converts the sound data given during the projection display operation into an analog signal, and drives the speaker 23 to emit a loud sound.
Next, a more detailed configuration of the projection unit 17 will be described with reference to FIG.

  The projector device 10 uses a micromirror element 31 as a reflective display element. First, light emitted from the light source lamp 33 enclosed in the reflector 32 is transmitted to the light guide rod 36 as, for example, R, G, or B primary color light via a color wheel 35 that is rotationally driven by a motor (M) 34. Incident.

  On the emission side of the light guide rod 36, a light source system lens 37 configured by combining a plurality of light source lenses in order to reduce lens aberration is disposed, and the primary color light emitted from the light guide rod 36 is After passing through the light source system lens 37, it is totally reflected by the mirror 38, and then enters the micromirror element 31 through the relay optical member 39 formed of one optical lens.

  Thus, the primary color light image formed by reflecting the primary color light on the micromirror element 31 is constituted by a plurality of lens groups having a zoom function and a focusing function via the relay optical member 39. The light is emitted from the projection system lens 40 and projected and displayed on a screen (not shown).

A temperature sensor 41 is disposed in the vicinity of the light source lamp 33 of the reflector 32 so that the light emission temperature of the light source lamp 33 can be detected.
In the micromirror element 31, a total of four LEDs 42, 42,... Are integrally formed in the rectangular direction adjacent to the display range for forming a light image in the reflection direction. These LEDs 42, 42,... Emit red light, for example, are driven to light based on the control of the control unit 18, and the emitted light passes through a relay optical member 39 and a projection system lens 40 to a screen (not shown). By the projection display, the position of the projection image corresponding to the display range of the micromirror element 31 can be visually recognized even when the light emission luminance of the light source lamp 33 is low as at the beginning of power-on.

Next, the operation of the above embodiment will be described.
FIG. 3 shows the contents of control by the control unit 18 immediately after the power is turned on by operating the power key provided in the key input unit 19.

  Initially, first, the lighting drive of the light source lamp 33 is started (step A01), and at the same time, counting of the time t by the timer built in the control unit 18 is started (step A02).

  After that, the LEDs 42, 42,... Integrally formed with the micromirror element 31 are simultaneously turned on (step A03), and the value of the time t becomes a predetermined value, for example, “5 (minutes)”. (Step A04), and if not, the process of returning to the process from step A03 is repeated, so that the lighting state of the LEDs 42, 42,... Is maintained until a predetermined time elapses. .

  FIG. 4 exemplifies the content projected on the screen SCR to be projected at this time. For the rectangular image display area AR generated by the light source lamp 33, the LEDs 42, 42,... For example, red spot lights SP, SP,... Are projected and displayed.

  Accordingly, even when the light source lamp 33 is turned on immediately after the power is turned on, the light emission luminance is still low and the image display area AR irradiated on the screen SCR does not reach sufficient brightness. The initial setting such as the installation position, zoom angle, elevation angle, and focus position of the projector apparatus 10 can be executed while visually recognizing the projection positions of the red spot lights SP, SP,. it can.

  If the time t has elapsed and the count value of the time t by the timer of the control unit 18 reaches a predetermined value, this is determined in step A04, and it is assumed that the entire setting operation has been completed, and the LEDs 42, 42,. Is stopped (step A05), and the processing of FIG. 3 is completed as described above, and a normal projection operation is started.

  Thus, separately from the light source lamp 33 for performing projection display, the projection range can be visually recognized immediately after the power is turned on by the LEDs 42, 42,... Incorporated in the micromirror element 31 as a display element. Installation including various adjustments can be completed in a shorter time without depending on the time when the light source lamp 33 is energized to obtain a predetermined brightness.

  In addition, in the above embodiment, when the light source lamp 33 has a predetermined brightness and a predetermined time has passed so that the projection range can be directly visually recognized without using the LEDs 42, 42,..., The LEDs 42, 42,. Are automatically stopped so that unnecessary lighting driving of the LEDs 42, 42,... Is avoided, and the spot light SP accompanying the light emission of the LEDs 42, 42,. , SP,... Are projected adjacent to the projection contents, and the display quality is not deteriorated, and the normal projection operation can be immediately performed.

  In the above embodiment, the lighting of the LEDs 42, 42,... Has been described as being performed for a predetermined time immediately after the power is turned on depending on the rising characteristics of the light source lamp 33. However, the present invention is not limited to this. Instead of the control based on time, when the temperature of the light source lamp 33 detected by the temperature sensor 41 reaches a preset temperature, it is determined that the light source lamp 33 emits light with a necessary luminance. The lighting drive of the LEDs 42, 42,... May be stopped, and a luminance sensor may be provided in a part of the reflector 32 in place of the temperature sensor 41 so that the light emission luminance of the light source lamp 33 is directly and accurately determined. When the light source lamp 33 detects and determines that the light source lamp 33 emits light with a necessary luminance, the lighting drive of the LEDs 42, 42,... May be stopped.

  Further, the LEDs 42, 42,... Are integrated into the micromirror element 31, and the light emitted from the LEDs 42, 42,... Is similar to the light image formed by the micromirror element 31, and the relay optical member 39 and the projection system lens 40 are used. The projection system lens 40 is projected onto the projection target, so that even if the projection system lens 40 has a zoom mechanism, is it possible to always display an accurate projection range in conjunction with the projection angle of view? it can.

  In the embodiment described above, the LEDs 42, 42,... That emit red light are used as the self-light-emitting elements for irradiating the projection range. It is not limited by the invention.

  In the above embodiment, the projector device 10 has been described as forming and displaying a color light image using the micromirror element 31 and the color wheel 35 that are reflective display elements. The elements for forming a color light image are not limited to these, and a transmissive display element, for example, a transmissive color liquid crystal display panel may be used instead of a reflective display element.

  In addition, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

  Further, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent elements are deleted from all the constituent elements shown in the embodiment, at least one of the problems described in the column of the problem to be solved by the invention can be solved, and described in the column of the effect of the invention. In a case where at least one of the obtained effects can be obtained, a configuration in which this configuration requirement is deleted can be extracted as an invention.

1 is a block diagram showing a circuit configuration of a projector device according to an embodiment of the invention. The figure which shows the detailed structure of the projection unit of FIG. The flowchart which shows the processing content immediately after power activation which concerns on the embodiment. The figure which illustrates the projection content immediately after power activation which concerns on the embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Projector apparatus, 11 ... Input / output connector part, 12 ... Input / output interface (I / F), 13 ... Image conversion part, 14 ... Display encoder, 15 ... Video RAM, 16 ... Display drive part, 17 ... Projection unit, DESCRIPTION OF SYMBOLS 18 ... Control part, 19 ... Key input part, 20 ... Ir receiving part, 21 ... Indicator part, 22 ... Audio | voice processing part, 23 ... Speaker, 31 ... Micromirror element, 32 ... Reflector, 33 ... Light source lamp, 34 ... Motor (M), 35 ... color wheel, 36 ... light guide rod, 37 ... light source system lens, 38 ... mirror, 39 ... relay optical member, 40 ... projection system lens, 41 ... temperature sensor, 42 ... LED, AR ... image display Area, SB ... system bus, SCR ... screen.

Claims (5)

A display element that displays an image according to an input image signal;
A light source that emits light to the display element;
Projection means for projecting a light image obtained by reflecting or transmitting light from the light source by the display element;
A projection range display unit that has a self-luminous element incorporated in the vicinity of the image display region of the display element, and displays the projection range of the projection unit by lighting thereof;
Detecting means for detecting a state of light emission luminance of the light source;
An image projection apparatus comprising: a control unit that drives the projection range display unit to turn on according to a power-on state and a detection result of the detection unit.   2. The image projection apparatus according to claim 1, wherein the control means drives the projection range display means to turn on until a predetermined time elapses after the power is turned on. The detection means detects the temperature or emission luminance of the light source,
2. The image projection apparatus according to claim 1, wherein the control means drives the projection range display means to turn on until the light source reaches a predetermined temperature or light emission luminance by a detection signal from the detection means after power is turned on. . The projection unit has a zoom mechanism that varies a projection angle of view,
The image projection apparatus according to claim 1, wherein the projection range display unit displays the projection range in conjunction with a projection angle of view of the projection unit. A projection step of projecting a light image by reflecting or transmitting light from a light source to a display element that displays an image according to an input image signal;
A projection range display step of displaying a projection range in the projection step by lighting a self-luminous element incorporated in the vicinity of the image display area of the display element;
A detection step of detecting the state of light emission luminance of the light source;
An image projection method comprising: a control step of controlling lighting driving of the self-luminous element in the projection range display step based on a power-on state and a detection result of the detection step .

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