JP4219745B2 - Projector device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
According to the present invention, white light from a light source is projected onto a screen through a color wheel means, a digital micromirror device means (hereinafter referred to as DMD), and projection optical means to obtain a desired image. More specifically, the present invention relates to a so-called digital light processing system (hereinafter referred to as DLP system) projector apparatus, and more particularly to a projector apparatus capable of easily and accurately obtaining color temperature adjustment, which is color adjustment of projection light.
[0002]
[Prior art]
In DLP projectors, it is important that the color temperature, which means the quality of the projection light, is desired. In order to ensure a desired color temperature, it is necessary to detect the color temperature of the projection light and adjust it as necessary.
As a DLP projector apparatus configured to detect the color temperature of the projection light and adjust the projection temperature, for example, those disclosed in the following patent documents are known.
[0003]
[Patent Document 1]
JP 2001-188196 A (first page, FIG. 1)
[0004]
[Problems to be solved by the invention]
In a DLP projector device, a large amount of heat is generated from the light source means during use, and the generated heat causes a temperature change in the device body, resulting in a change in the shape of the device body.
In addition, with the use of a DLP projector device, the optical transmittance and reflectance of the optical system change over time.
[0005]
The DLP projector device shows the color quality on the image related to the projection light due to the above-described temperature change and aging change, so-called color temperature changes, and the predetermined color is not maintained. a problem that would not and the color tone of the image was thinking at the beginning can not be obtained.
[0006]
As a method for solving such a problem, it is possible to detect the color temperature of the projection light and adjust it to a predetermined value as necessary.
The DLP projector device disclosed in the above publication obtains light information by detecting light (OFF light) reflected from a DMD in a direction different from the direction of the projection light. The color temperature is adjusted based on the above.
[0007]
When the color temperature of projection light is detected in a DLP projector and is adjusted to a predetermined value as necessary, the color temperature is detected on the projected and imaged screen. Is the most reasonable and accurate.
However, in reality, the screen surface and the projector device are separated by a large distance, and there is a problem that a large-scale means is required to detect the color temperature on the screen surface and feed back the detection result to the projector device. It was.
[0008]
In addition, when detecting the color temperature of the projection light of the DLP projector device, if there is light other than the projection light, the color temperature of the projection light cannot be accurately detected. In this state, it is necessary to detect the color temperature of the projection light. Therefore, the color temperature is detected on the screen and the color temperature is adjusted based on the detection result in a dark environment, and the work becomes complicated and the problem becomes even more serious.
[0009]
The projector device disclosed in the above publication is configured to obtain light information by detecting light reflected from a DMD in a direction different from the direction of projection light from the DMD.
In such a configuration, since the detection of the color temperature of the light is performed in the apparatus main body, there is no problem that the means for adjusting the color temperature of the projection light is large, and the operation of detecting the color temperature itself is complicated. There is no problem of becoming.
[0010]
However, in the projector device having such a configuration, the color temperature is sensed by light (OFF light) different from the projection light, and the projection optical means changes the color temperature of the projection light due to temperature change or secular change. There is a problem that light that does not pass through the projection optical means is easily and cannot be reliably and accurately sensed and adjusted for the color temperature.
[0011]
In particular, viewers such as projector apparatuses have recently become sensitive to the color, tone, and hue of image light.
Therefore, if an image for which an accurate color temperature is not ensured is received as having an appropriate color temperature, the value of the work itself projected by the projector device will be impaired, and the problem becomes even more serious. It is becoming.
[0012]
The present invention has been made in view of the above circumstances, and the present invention can be easily performed without detecting the color temperature and adjusting the color temperature, and the color of the projection light. It is possible to detect the temperature reasonably and accurately, and therefore it is possible to adjust the color temperature of the projection light more appropriately and accurately, and it is independent of the temperature change and secular change of the device body. It is an object of the present invention to provide a projector device capable of detecting and adjusting the color temperature actually possessed at that time.
[0013]
[Means for Solving the Problems]
One aspect of the present invention is provided with a lid that can block projection light transmitted through the projection optical means at a subsequent stage of the projection optical means, and for detecting the color temperature of the projection light on the lid. This is a projector apparatus having a configuration in which sensor means is provided and adjustment is controlled so that a desired color temperature can be obtained.
[0014]
Its detailed configuration receives a light source means for outputting white light, a color wheel for outputting a plurality of primary color light enter the white light from said light source means, the primary light from the color wheel means, image a digital micromirror device means for reflecting light for configuring, the light is transmitted from the digital micromirror device means, and projection optical means for obtaining an image obtained by enlarging a desired size, for the projection disposed downstream of the optical means, a lid capable of shielding the light for projection coming through the optical means for the projection, is attached to the surface on the side for shielding light for the projection of the lid, the sensor means for detecting the color temperature of the light for projection from the projection optical device, light from the digital micromirror device means constitutes a predetermined image based on the data of the video In, and a control means color temperature of the projected light based on the detection result from the sensor means so that the output as desired, for controlling operation of the color wheel means and said digital micromirror device means, A projector device comprising:
[0015]
In the projector apparatus having the above-described configuration, the lid is specifically held on the side of the casing constituting the apparatus main body, and is configured to shield and release the optical path of the projection light as desired, and to constitute the projection optical means For example, a cap that can be attached to and detached from the last stage lens to be protected is included.
[0016]
In the projector device according to the aspect of the present invention, when the control unit changes the output level of light from the DMD from 100 to substantially 0%, the color temperature is adjusted corresponding to each level. Is configured.
Furthermore, when the control means changes the output level of light from the DMD from 100 to substantially 0%, there is a projector device including a storage unit that stores a reference value corresponding to each level.
[0017]
In the projector device according to one aspect of the present invention having such a configuration, the sensor means attached to the surface of the lid that shields the projection light detects the color temperature related to the projection light. The detection of the color temperature is performed by the apparatus main body, and the sensor means is located at the subsequent stage of the optical means, so that the sensor means senses the projection light via the optical means.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described in detail based on the embodiment shown in FIGS. However, the present invention is not limited to the embodiments.
As shown in FIG. 1, the projector device 1 includes a casing 2, a light source unit 3, a color wheel unit 4, a DMD 5, a projection optical unit 6, a lid 7, a sensor unit 8, and a control unit 9. Is provided.
[0019]
The casing 2 has an opening 10 at the front for allowing the projection light from the projection optical means 6 to pass therethrough.
The light source means 3 outputs white light, and ON / OFF of the output is controlled by the control means 9.
[0020]
The color wheel means 4 inputs light from the light source 3 and outputs a plurality of primary color lights.
The color wheel means 4 is a disk-shaped color filter 11 colored in red (R), green (G) and blue (B) in a region divided in the radial direction, and rotates the color filter 11 at a predetermined angular velocity. It is mainly composed of a motor 12 to be driven.
[0021]
The rotation of the motor 12 is controlled by the control means 9 so as to transmit and transmit projection light based on video signal data relating to the video.
A condenser lens 13 is interposed between the light source means 3 and the color wheel means 4 for narrowing the white light from the light source means 3 to a predetermined size and sending it to the color filter 11.
[0022]
The DMD 5 includes a digital micromirror device (not shown), and receives primary color light sent via the color wheel means 4 and reflects light for constituting an image.
The DMD 5 is controlled by the control means 9 so as to reflect and transmit the projection light based on the video signal data relating to the video.
[0023]
An optical means 14 is interposed between the color wheel means 4 and the DMD 5 to send the R, G, and B primary color lights from the color wheel means 4 to the DMD 5 as parallel light.
[0024]
The projection optical means 6 transmits light for projection from the DMD 5 and enlarges it to obtain an image of a desired size on the screen.
Specifically, the projecting optical means 6 mainly includes a lens group (not shown) and a cylindrical body 15 that holds the lens group in a predetermined state.
[0025]
As shown in FIGS. 1 and 2, the projector device 1 has a lid 7, which can shield projection light transmitted through the projection optical means 6, on the inside of the front portion of the casing 2. It is slidably arranged.
The lid 7 is formed with a window portion 16 that allows the projection light from the projection optical means 6 to pass therethrough and a shielding portion 17 that shields the projection light.
[0026]
On the other hand, the lid body 7 has a rack gear portion 18 formed on the bottom surface, and is provided with a pinion gear 19 that meshes with the rack gear portion 18. The lid body 7 is directed in the directions of arrows A and B with respect to the projection optical means 6. It is configured to slide.
Reference numeral 20 denotes a geared motor that rotationally drives the pinion gear 19.
[0027]
Accordingly, when the lid 7 is slid in the direction of arrow A by outputting the geared motor 20 in the forward direction, the projection optical means 6 is positioned in the window portion 16.
At this time, the window portion 16 of the lid body 7 takes a position facing the opening portion 10 of the casing 2, and the projection light from the projection optical means 6 passes through the window portion 16 in the direction of the screen (not shown). It is possible to proceed.
On the other hand, when the lid 7 is slid in the direction of the arrow B by outputting the geared motor 20 in the reverse direction, the projection optical means 6 is positioned at the shielding portion 17, and the projection from the projection optical means 6 is performed. Light is shielded.
[0028]
The lid 7 is provided with sensor means 8 for detecting the color temperature related to the projection light from the projection optical means 6 on the shielding part 17.
The sensor means 8 is connected to the control means 9, and the color wheel means so that the projection light from the DMD 5 via the projection optical means 6 forms a predetermined image based on the data stored in the control means 9. 4 and detection for adjusting the color temperature so as to control the operation of the DMD 5.
[0029]
Here, the adjustment of the color temperature, that is, the control of the control means 9 for controlling the adjustment so that the output is as desired when the color temperature of the projection light is not as desired based on the detection result from the sensor means 8. For example, as shown in FIG. 3, the input level changes unambiguously corresponding to the 1024 gradations from 1023 to almost 0 while the input level changes to 256 gradations from 255 to almost 0. The operation of the color wheel means 4 and the DMD 5 is controlled so as to follow the characteristic curve (γ curve).
Note that the data shown in FIG. 3 serving as a reference for adjusting the color temperature is stored in a storage unit (not shown) of the control means.
[0030]
The projector device 1 is configured as described above.
Hereinafter, the adjustment of the color temperature of the projector apparatus 1 will be described.
The operator first turns on the main switch of the projector device 1 to start the operation, operates the remote control means (not shown), outputs the geared motor 20 in the reverse direction via the control means 9, and closes the lid body 7. Slide in the direction of arrow B.
Here, the projection optical means 6 is positioned at the shielding portion 17 so that the projection light is shielded, and the sensor means 8 covers the final stage lens of the projection optical means 6.
[0031]
Next, the operator, via the remote control device and a control unit 9 causes the light source unit 3 outputs white light.
Here, the white light from the light source means 3 is narrowed down to a predetermined size via the condenser lens 13 and further outputted to the optical means 14 side as primary color light via the color wheel means 4.
[0032]
The primary color light is transmitted as parallel light to the DMD 5 via the optical means 14, and is input to the projection optical means 6 as a white light for inspection based on video signal data at 100% input in the DMD 5. Reflected and sent out.
The light from the DMD 5 becomes projection light through the projection optical means 6 and travels to the lid 7, but the projection light is shielded by the lid 7 and reaches the sensor means 8.
[0033]
Here, the sensor means 8 detects the color temperature of the projection light and sends the data to the control means 9.
The control means 9 judges whether or not the data from the sensor means 8 matches the value when the input level and the output level are at the 100% input level of the built-in memory. Instruct to proceed.
[0034]
That is, the sensor means 8 detects the configuration of the ratio (color temperature) of R, G, and B (white color) when the input level is 100%, and the control means 9 If it is determined whether or not it is configured with a ratio (color temperature) of R, G and B at a predetermined ratio based on the ratio stored in the built-in memory, and it is determined that it is configured with a predetermined ratio If there is not, an instruction is given to proceed to detection of the next stage.
[0035]
On the other hand, when it is determined that white light with an input level of 100% is not composed of a predetermined ratio of R, G and B (color temperature), the control means 9 is stored in the built-in memory. A signal for adjusting the color temperature is sent to the DMD 5 so that the same ratio can be obtained.
[0036]
Here, when the color temperature is secured when the output level is 100%, the relationship between the input level and the output level is detected in the case where the output level is 95%, which is lower by 5%. To adjust the color temperature.
[0037]
Hereinafter, in the same manner, the input level is lowered by 5 percent so that the relationship between the input level and the output level has a characteristic as shown in FIG. 3, and detection up to almost 0 percent and the color as necessary. Adjust the temperature.
Since measurement is impossible at an input level of 0 percent, a value that can be regarded as substantially 0 percent, for example, a value of 0.5 percent is used.
[0038]
As described above, since the projector device 1 directly detects the color temperature at that point in time for the projection light via the projection optical means 6, it is performed for the light that is not the projection light. Compared with the case of detecting the color temperature, a more accurate detection result can be obtained, and furthermore, the color temperature can be adjusted more appropriately for the projection light.
[0039]
Further, as described above, the projector device 1 can detect the color temperature by the sensor means 8, the control means 9 and the like attached to the lid 7, and detects the color temperature on the screen surface. Compared to the above, the detection and the adjustment of the color temperature are not excessive and can be easily performed.
[0040]
In addition, when detecting projection light, according to the prior art, only the projection light to be detected should be free of other light, so the color temperature detection operation itself is performed in an environment with extremely low brightness. It tends to get worse.
However, in the projector apparatus 1, the sensor means 8 senses only the projection light when detecting the color temperature, and the color temperature can be detected regardless of the surrounding brightness. Workability is ensured in adjusting the temperature.
[0041]
The projector device 1 has a configuration in which sensor means 8 for detecting the color temperature is attached to the lid body 7 and the projection light from the projection optical means 6 is shielded by the lid body 7 sliding relative to the casing. It has become.
But in a projector device the operator can easily approach the lens of the last stage of the projection optical unit 6, the lid 7 is intended caps like which can removably by the operator's hand, and, on its inner surface The sensor means 8 may be provided.
[0042]
In the adjustment of the color temperature of the projector device 1 described above, the configuration of the ratio of R, G, and B (color temperature) for white light when the input level is 100% is obtained, and as necessary. The color temperature is adjusted, and then the relationship between the input level and the output level is detected when the output level is 95%, which is lower by 5%. Thereafter, the input level is similarly decreased by 5%.
However, based on the detection accuracy and the time spent adjusting the color temperature, it is preferable to appropriately select the value, for example, by lowering the input level by 3 percent.
[0043]
Although the characteristic curve showing the relationship between the input level and the output level shown in FIG. 3 is continuous, it becomes a discrete value in detecting the actual ratio of R, G, and B (color temperature).
This is what is desired assuming that the configuration of the ratio of R, G, and B (color temperature) changes continuously, and indicates that there is no singular point.
[0044]
In the projector apparatus 1, the color temperature is checked and adjusted based on the characteristic curve (γ curve) shown in FIG. 3, but the characteristic curve may be appropriately selected as desired, and the control means 9 It is desirable that the characteristic curve stored in the above can be appropriately rewritten.
[0045]
The projector apparatus 1 is operator has a configuration that functions by operating the remote control device, the top surface of the casing, carry out the operation directly by disposing the operating portion on the side surface or the like configuration, and further, the remote control The configuration may be a combination of operation by the apparatus and direct operation.
[0046]
Although the projector apparatus 1 has a configuration in which a video signal indicating the content of projection is built in, the projector apparatus 1 may have a configuration in which the video signal is supplied from the outside via a cable or the like.
[0047]
【The invention's effect】
The present invention is provided with a lid for shielding the projection light from the projection optical means, and a sensor means for detecting the color temperature is provided on the light shielding side of the lid. The projector is capable of accurately detecting the color temperature and adjusting the color temperature as necessary, and can easily detect the color temperature and adjust the color temperature.
The present invention also changes the output level of the projection light from the projection optical means from 100 percent to substantially 0 percent, and stores and checks the color temperature value related to the color temperature corresponding to each output level. By providing such a function, it is possible to check and adjust the color temperature corresponding to a change in the output level of the projection light from 100 percent to substantially 0 percent.
[Brief description of the drawings]
FIG. 1 is a configuration explanatory diagram illustrating a configuration of an embodiment of the present invention.
FIG. 2 is a perspective view showing a main part of the embodiment shown in FIG.
FIG. 3 is a characteristic curve showing the relationship between input and output related to color temperature in the embodiment shown in FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Projector apparatus 2 Casing 3 Light source means 4 Color wheel means 5 DMD
6 Projection optical means 7 Lid 8 Sensor means 9 Control means 10 Opening 16 Window 17 Shield

Claims (5)

Light source means for outputting white light;
A color wheel for outputting a plurality of primary color light enter the white light from said light source means,
Receiving the primary light from the color wheel unit, and a digital micromirror device means for reflecting light for constituting the image,
Wherein light is transmitted from the digital micromirror device means, and projection optical means for obtaining an image obtained by enlarging a desired size,
Disposed downstream of the projection optical means, a lid capable of shielding the light for projection coming through the optical means for the projection,
Sensor means for detecting said is attached to the surface on the side for shielding light for the projection of the lid, the color temperature of the light for projection from the projection optical means,
As light from the digital micromirror device means constitutes a predetermined image based on the data of the video, and the color temperature of the projected light is output as desired based on the detection result from the sensor means Control means for controlling the operation of the color wheel means and the digital micromirror device means ,
A projector device comprising: The projector apparatus according to claim 1, wherein the lid body is held by a casing constituting the apparatus main body, and shields and releases an optical path of projection light as desired. The lid, the projector device according to claim 1, wherein the cap to protect the final lens of the optical means for the projection. It said control means, the output level of the projected light from the projection optical device when changing to 0% from 100%, any of claims 1 to 3 to adjust the color temperature corresponding to each output level The projector device according to item 1 . It said control means, the output level of the projected light from the projection optical device when changing to 0% from 100%, to claim 4 comprising a storage unit which stores a reference value corresponding to the output level The projector apparatus as described.

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