JP2007199290A - Picture display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a picture display device which easily adjusts picture quality characteristics of a formed picture. <P>SOLUTION: The picture display device 1 comprises a picture forming device 2 for forming a picture according to input picture information, and a controller 3 for controlling the whole device including the picture forming device 2. The controller 3 comprises: a storage means 36 including a correction value storage means 361 for storing a correction value to correct the picture quality of the picture formed by the picture forming device 2 to predetermined picture quality, and a change value storage means 362 which stores a cumulative drive time of the picture forming device 2 and a change value of the picture quality of the formed picture varying according to the cumulative drive time while associated with each other; a picture quality correction means 32 for correcting the picture quality of the formed picture based on the correction value; a time counter 34 for counting the cumulative drive time of the picture forming device 2; and a correction value updating means 35 for updating the correction value, based on the change value corresponding to the cumulative drive time counted by the time counter 34. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an image display apparatus including an image forming apparatus that forms an image according to input image information, and a control device that controls the entire apparatus including the image forming apparatus.

Conventionally, as an image display device, a light source, a light modulation device that modulates a light beam emitted from the light source according to image information and forms an image, and projection optics that enlarges and projects an image formed by the light modulation device A projector equipped with a system is known. Examples of the light modulation device used in such a projector include a liquid crystal panel and a device using a micromirror.
As a projector using such a liquid crystal panel, a separation optical system that separates a light beam emitted from a light source into three color lights of red (R), green (G), and blue (B), and for each color light A so-called three liquid crystal panel provided with three liquid crystal panels that modulate each color light to form a color image corresponding to each color light and a color synthesis optical device that synthesizes each color image to form a full-color projection image. A plate projector is known.

Here, the transmission characteristics of the liquid crystal panel used in the three-plate projector have a non-linear S-shaped curve, and the transmission characteristics are different for each liquid crystal panel. Therefore, it is necessary to adjust the driving of each liquid crystal panel. Because of this need, images output from a liquid crystal projector are measured with a luminance meter and a color meter, and a gamma correction value is calculated from the luminance data and color difference data acquired by each instrument and stored in the memory of the liquid crystal projector. There is known a method of writing in a lookup table (LUT) (see, for example, Patent Document 1).
According to the method described in Patent Document 1, the liquid crystal projector can form and display a more natural image by driving each liquid crystal panel based on the gamma correction value set in the LUT.

JP 2001-238227 A

However, the method described in Patent Document 1 is a method performed at the stage of manufacturing a projector, and the generated image generation characteristics change due to changes in optical characteristics and the like based on use after shipment. There is a problem that it can not cope.
In other words, when an optical element such as a polarizing plate or a lamp provided in the projector is deteriorated due to secular change or the like and the image forming characteristics are changed, each liquid crystal panel is driven based on the gamma correction value set in the LUT. Even in this case, it becomes impossible to form and display an image close to nature. For this reason, it is necessary to write a gamma correction value according to the current projector status in the LUT. In such a case, it is necessary to bring the projector to a factory or the like where a luminance meter and a color meter are installed. There is a problem that it is troublesome.

On the other hand, if the model of the projector as a product is different, the optical characteristics and image quality characteristics, and thus the internal circuit are also different, so an adjustment device corresponding to the model is required. However, the old model adjustment device may be diverted to the new model adjustment device or discarded. Therefore, there is a possibility that the adjustment device corresponding to the model to be adjusted cannot be secured. In such a case, there is a problem that the LUT cannot be updated even if a projector is brought into a factory or the like.
The above problems are common to various image output devices such as a single-plate liquid crystal projector, a liquid crystal display, a plasma display (PDP), and an organic EL display, as well as the three-plate liquid crystal projector.

  An object of the present invention is to provide an image display device capable of easily adjusting the image quality characteristics of a formed image.

  In order to achieve the above object, an image display apparatus according to the present invention includes an image forming apparatus that forms an image according to input image information, and a control device that controls the entire apparatus including the image forming apparatus. An image display device, wherein the control device stores a correction value storage for storing a correction value for correcting the image quality of an image formed by the image forming device to a predetermined image quality, and an accumulated driving time of the image forming device. A storage unit having a change value storage unit that stores the change value of the image quality of the formed image that changes according to the cumulative drive time, and corrects the image quality of the formed image based on the correction value. An image quality correction unit, a clocking unit that counts the cumulative drive time of the image forming apparatus, and a correction value update that updates the correction value based on the change value corresponding to the cumulative drive time counted by the clocking unit. Characterized in that it comprises a means.

According to the present invention, the time measuring means measures the cumulative drive time of the image forming apparatus, and the correction value update means is based on the change value of the image quality corresponding to the cumulative drive time measured by the time measuring means. The correction value stored in the means is updated. According to this, since the image quality correction means can correct the image quality of the image formed by the image forming apparatus based on the updated correction value, the image quality correction of the image formed by the current image forming apparatus. Can be performed appropriately and simply.
Further, in the present invention, the correction value used when correcting the image quality of the formed image is updated by the correction value updating means according to the cumulative driving time of the image forming apparatus. There is no need to carry the image display device of the invention to a factory or the like. Therefore, it is possible to easily adjust the image quality of the formed image.
Furthermore, the configuration can be simplified as compared with an image display device that captures a displayed image by an imaging unit such as a camera and updates a correction value in accordance with the state of the captured image. This process can be simplified.

  In the present invention, the storage unit includes a reference value storage unit that stores a correction reference value indicating the predetermined image quality, and the correction value update unit includes a correction value for adjusting the change value to the correction reference value. It is preferable that a correction value generation unit that generates the correction value and a correction value update unit that updates the correction value stored in the correction value storage unit with the correction value generated by the correction value generation unit.

  According to the present invention, the correction value generation unit adjusts the correction reference value stored in the reference value storage unit of the storage unit to the correction value for adjusting the change value of the image quality according to the cumulative driving time of the current image forming apparatus. The correction value newly generated and stored in the correction value storage unit of the storage means is updated with the correction value. According to this, by generating a correction value for adjusting the change value of the image quality of the formed image obtained from the cumulative driving time of the image forming apparatus to the correction reference value, the image quality of the formed image by the current image forming apparatus is It can be adjusted appropriately. Therefore, the image quality of the image formed by the image forming apparatus can be matched with the image quality related to the correction reference value, so that an appropriate image quality can be maintained.

  In the present invention, an operation unit that outputs an operation signal for causing the control device to execute a predetermined operation is provided, and the control device causes the image forming device to form a menu screen for adjusting the image quality of the formed image. It is preferable that the correction value update unit includes a reference value update unit that updates the correction reference value according to the operation signal input from the operation unit during display of the menu screen.

  According to the present invention, the reference value update unit of the correction value update unit updates the correction reference value stored in the reference value storage unit of the storage unit by an operation on the menu screen generated by the menu display unit. The image quality can be adjusted to the user's preference. That is, the correction value generation unit newly generates a correction value that adjusts the change value according to the cumulative driving time of the current image forming apparatus to the correction reference value updated by the operation on the menu screen. The image quality of the formed image corrected by the image quality correction unit based on the correction value can be the image quality indicated by the updated correction reference value. Accordingly, image quality correction can be performed according to the user's operation on the menu screen, so that the image quality of the image formed by the image forming apparatus can be set to an image quality according to the user's preference.

  In the present invention, the image forming apparatus includes a light source, a light modulation device that modulates a light beam emitted from the light source according to the image information to form the image, and a light beam emitted from the light source. And an optical element that optically converts an incident light beam, and the time measuring means measures at least one of the first time measuring unit that measures the cumulative lighting time of the light source, the light modulation device, and the optical element. A second timing unit that counts the accumulated usage time, and the cumulative drive time is the cumulative lighting time measured by the first timing unit and the cumulative use timed by the second timing unit. It is preferable to include time.

  According to the present invention, the first time measuring unit of the time measuring unit measures the cumulative lighting time of the light source, and the second time measuring unit measures the accumulated use time of at least one of the light modulation device and the optical element. Then, the correction value update unit acquires the change value of the image quality according to the cumulative lighting time and the cumulative usage time from the change value storage unit of the storage unit, and stores the change value in the correction value storage unit of the storage unit based on the change value. Update the correction value. According to this, the image quality of the formed image is corrected according to the state of the light source whose luminance value changes with the cumulative lighting time, and the light modulation device and the optical element whose hue of the formed image changes with the cumulative usage time. Can do. Therefore, the image quality of the image formed and displayed by the current image forming apparatus can be adjusted more appropriately.

In the present invention, preferably, the light source is configured to be replaceable, and the first time measuring unit resets the cumulative lighting time when the light source is replaced.
Here, in an image display device that forms an image using light emitted from a light source, the light source may be replaced for reasons such as lifetime. In such a case, if the first time keeping unit keeps counting the cumulative lighting time of the light source as it is, the image forming apparatus sets the image with the setting of the light source whose luminance is lowered before the replacement even though the light source is replaced. It is conceivable that the formed image will be deteriorated.
On the other hand, in the present invention, when the light source is replaced, the first timer unit can newly measure the cumulative lighting time of the replaced light source by resetting the cumulative lighting time. Accordingly, the current state of the image display apparatus can be grasped more accurately, and the image quality of the formed image can be corrected more accurately.

In the present invention, it is preferable that the change value includes at least one of a color coordinate value of a white image formed by the image forming apparatus and a color coordinate value of a light beam emitted from the light source.
According to the present invention, since the color coordinate value of the white image as the change value is stored in the change value storage unit, it is possible to appropriately correct a plurality of color images included in the formed image. That is, since white light is color light in which colored light of each wavelength is combined, by correcting based on the color coordinate value of the white image that is the white light, each color image included in the white image is appropriately corrected. Can do.
In addition, since the emitted light beam from the light source is used for image formation, the hue of the formed image changes when the color coordinate value of the light beam emitted from the light source changes according to the cumulative lighting time. On the other hand, the color coordinate value of the emitted light beam of the light source corresponding to the cumulative lighting time of the light source is stored in the change value storage unit, so that a correction value is generated based on the color coordinate value, and the correction value By performing the image quality correction based on the above, the hue of the formed image can be maintained in an appropriate state.
Therefore, the image quality of the formed image can be corrected more appropriately.

[1. First Embodiment]
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a first embodiment of the invention will be described with reference to the drawings.
(1-1) Overall Configuration of Projector 1 FIG. 1 is a block diagram showing a configuration of a projector according to the present embodiment.
The projector 1 according to the present embodiment is an image display device that modulates a light beam emitted from a light source in accordance with input image information to form an image, and enlarges and projects the image on a screen SC or the like.
As shown in FIG. 1, the projector 1 includes an image forming apparatus 2 that forms an image corresponding to image information, and a control device 3 that controls the entire apparatus including the image forming apparatus 2. The projector 1 also includes an operation panel 4 and a remote control interface (hereinafter sometimes abbreviated as “remote control IF”) 5.

  Among these, the operation panel 4 is provided exposed on the outer surface of the projector 1, and the operation panel 4 is provided with a plurality of keys. And if each key is input, the operation panel 4 will output the control signal according to the said key to the control apparatus 3 mentioned later. Examples of such keys include a power key for turning on / off the projector 1, a menu key for displaying a menu screen for performing various settings, a setting key for performing a selection operation on the menu screen, and a determination key for determining selection. Etc. are provided.

  The remote control IF 5 receives an infrared signal from the remote control 9 as an external device, converts the infrared signal into a digital signal, and outputs the digital signal to the control device 3 as a control signal. The remote controller 9 is provided with the same keys as the operation panel 4. And the remote control 9 is comprised so that the infrared signal according to the input of each key may be output. That is, the operation panel 4 and the remote controller 9 correspond to the operation means of the present invention.

(1-2) Configuration of Image Forming Apparatus 2 FIG. 2 is a schematic diagram showing an optical system of the image forming apparatus 2.
The image forming apparatus 2 forms an optical image corresponding to input image information under the control of the control device 3.
As shown in FIG. 2, the image forming apparatus 2 includes an integrator illumination optical system 21, a color separation optical system 22, a relay optical system 23, an electro-optical device 24, and these optical systems 21 to 24 at predetermined positions inside. A housing 25 to be housed and a projection lens 26 are provided.

  The integrator illumination optical system 21 is an optical system that divides the light beam emitted from the light source into a plurality of partial light beams, and uniformizes the in-plane illuminance of the illumination area. The integrator illumination optical system 21 includes a light source device 211, a first lens array 212, a second lens array 213, a polarization conversion element 214, a superimposing lens 215, and a reflection mirror 216.

  The light source device 211 illuminates the electro-optical device 24 by emitting the light beam emitted from the light source lamp 211A in a certain direction. The light source device 211 includes a light source lamp 211A, a reflector 211B, a collimating concave lens 211C, and a lamp box (not shown) that houses them. The light beam emitted from the light source lamp 211A is emitted as convergent light to the front side of the apparatus by the reflector 211B, collimated by the collimating concave lens 211C, and emitted to the first lens array 212. The light source device 211 is configured to be replaceable together with the lamp box.

The first lens array 212 divides the light beam emitted from the light source device 211 into a plurality of partial light beams, and includes a plurality of small lenses arranged in a matrix in a plane orthogonal to the illumination optical axis A. It is configured.
The second lens array 213 is an optical element that condenses a plurality of partial light beams divided by the first lens array 212 described above, and in the same manner as the first lens array 212, a matrix is formed in a plane orthogonal to the illumination optical axis A. It comprises a plurality of small lenses arranged in a shape.

The polarization conversion element 214 aligns the polarization direction of each partial light beam divided by the first lens array 212 with substantially one direction of linearly polarized light, and improves the utilization rate of light source light used in the electro-optical device 24 described later. is there.
The superimposing lens 215 condenses a plurality of partial light beams that have passed through the first lens array 212, the second lens array 213, and the polarization conversion element 214, and the light beams of a later-described liquid crystal panel 243 that constitutes the electro-optical device 24. Superimpose on the image forming area. The light beam emitted from the superimposing lens 215 is bent by the reflection mirror 216 and emitted to the color separation optical system 22.

The color separation optical system 22 includes two dichroic mirrors 221 and 222 and a reflection mirror 223. A plurality of partial light beams emitted from the integrator illumination optical system 21 by the dichroic mirrors 221 and 222 are converted into red (R), It has a function of separating light of three colors, green (G) and blue (B).
The dichroic mirrors 221 and 222 are optical elements in which a wavelength selection film that reflects a light beam in a predetermined wavelength region and transmits a light beam of another wavelength is formed on a substrate. Among these, the dichroic mirror 221 disposed in the front stage of the optical path reflects blue light and transmits other color light. Further, the dichroic mirror 222 arranged at the rear stage of the optical path reflects green light and transmits red light.

  The relay optical system 23 includes an incident side lens 231, a relay lens 233, and reflection mirrors 232 and 234, and has a function of guiding red light transmitted through the dichroic mirror 222 constituting the color separation optical system 22 to the electro-optical device 24. ing. Here, the relay optical system 23 is provided in the optical path of the red light because the optical path length of the red light is longer than the optical path lengths of the other color lights, thereby preventing a decrease in light use efficiency due to light divergence or the like. It is to do. In the present embodiment, the optical path length of red light is increased. However, for example, the optical path length of blue light may be increased. In such a case, the relay optical system 23 may be disposed on the blue light path.

  The blue light separated by the dichroic mirror 221 is bent by the reflection mirror 223 and then supplied to the electro-optical device 24 via the field lens 241. The green light separated by the dichroic mirror 222 is supplied to the electro-optical device 24 through the field lens 241 as it is. Further, the red light is condensed and bent by the lenses 231 and 233 and the reflection mirrors 232 and 234 constituting the relay optical system 23 and supplied to the electro-optical device 24 through the field lens 241. Note that the field lens 241 provided in the preceding stage of the optical path of each color light of the electro-optical device 24 converts each partial light beam emitted from the second lens array 213 into a light beam parallel to the illumination optical axis A.

The electro-optical device 24 is an image forming device that modulates an incident light beam to form a color image under the control of the control device 4 described later.
The electro-optical device 24 includes three incident-side polarizing plates 242 and three liquid crystal panels 243 (the red light liquid crystal panel is 243R, the green light liquid crystal panel is 243G, and the blue light liquid crystal panel is 243B). And three exit-side polarizing plates 244 and a cross dichroic prism 245. Then, the incident-side polarizing plate 242, the liquid crystal panel 243, and the exit-side polarizing plate 244 perform light modulation of each color light incident thereon.

The incident-side polarizing plate 242 receives each color light separated by the color separation optical system 22 and transmits only polarized light in a certain direction among the incident light beams, and absorbs other light beams.
The exit-side polarizing plate 244 has the same configuration as the incident-side polarizing plate 242 and transmits only polarized light in a predetermined direction among the light beams emitted from the liquid crystal panel 243 and absorbs other light beams.
The incident-side polarizing plate 242 and the exit-side polarizing plate 244 are set so that the directions of the polarization axes that transmit the incident light are orthogonal to each other.

The liquid crystal panel 243 corresponds to the light modulation device of the present invention, in which a liquid crystal as an electro-optical material is hermetically sealed in a pair of transparent glass substrates. For example, a polysilicon TFT (Thin Film Transistor) is used as a switching element. Have. Then, the liquid crystal panel 243 modulates the polarization direction of the polarized light beam emitted from the incident side polarizing plate 242 in accordance with a drive signal given by the control device 4 described later to form an image. Note that a liquid crystal panel using a TFD (Thin Film Diode) as a switching element may be employed.
The cross dichroic prism 245 corresponds to the color synthesizing optical device of the present invention, and forms a color image by synthesizing the optical image modulated for each color light emitted from the emission side polarizing plate 244.

  The projection lens 26 is a projection optical system that enlarges and projects the color image formed by the electro-optical device 24 onto a projection object such as a screen SC. Although not shown in detail, the projection lens 26 is configured as a combined lens in which a plurality of lenses are combined, and the plurality of lenses are housed in a lens holding cylinder 261.

(1-3) Configuration of Control Device 3 The control device 3 controls the entire apparatus of the projector 1 including the image forming apparatus 2 as described above. As shown in FIG. 1, the control device 3 includes an image information processing unit 31, an image quality correction unit 32, a panel driving unit 33, a time measuring unit 34, a correction value updating unit 35, and a storage unit 36.

Among these, the storage means 36 stores various data necessary for driving the projector 1. The storage means 36 is provided with a correction value storage unit 361, a change value storage unit 362, and a reference value storage unit 363.
The correction value storage unit 361 stores correction values for correcting each color image formed by the liquid crystal panels 243R, 243G, and 243B by the image quality correction unit 32 described later. This correction value can be updated by a correction value updating means 35 described later.

  The change value storage unit 362 stores the change value of the image quality of the image formed by the image forming apparatus 2 described above. Specifically, the change value storage unit 362 includes a color coordinate value of the emitted light beam according to the cumulative lighting time of the light source lamp 211A that constitutes the light source device 211, and a light source among the optical components that constitute the image forming apparatus 2 described above. The color coordinate value of the white image corresponding to the cumulative driving time of the optical components excluding the lamp 211A is stored. In other words, in the present embodiment, the change value of the image quality of the formed image depends on the color coordinate value of the light beam emitted from the light source lamp 211A corresponding to the cumulative lighting time of the light source lamp 211A and the cumulative usage time of the optical component. The color coordinate value of the white image formed by the optical component is stored in the change value storage unit 362.

  FIG. 3 is a diagram showing the temporal change characteristic of the light flux emitted from the light source lamp 211A. That is, FIG. 3 is a diagram showing changes in the x-coordinate value and the y-coordinate value of the emitted light beam according to the cumulative lighting time of the light source lamp 211A. FIG. 4 is a diagram showing a temporal change characteristic of a white image formed by the optical component according to the cumulative driving time of the optical component, and a diagram showing a chromaticity change of the y coordinate of the white image. 3 and 4, each plotted point (square) is an actual measurement value, a solid line is an approximate straight line of the actual measurement value, and a dotted line indicates a correction reference value described later.

Here, a change in the formed image due to the temporal change of the light source lamp 211A and the optical component will be described.
In the light source lamp 211A, the luminance ratio of the emitted light beam, that is, the color coordinate value (x, y) changes according to the cumulative lighting time. Specifically, as shown in FIG. 3, the color coordinate values of the emitted light flux when the cumulative lighting time of the light source lamp 211A is 0 hour are x = 0.328 and y = 0.388, whereas When the lighting time is 800 hours, x = 0.331 and y = 0.396, and when the cumulative lighting time is 2000 hours, x = 0.333 and y = 0.396. Thus, the color coordinate value of the emitted light beam of the light source lamp 211A is not constant with respect to the cumulative lighting time of the light source lamp 211A, and the color coordinate value (x, y) tends to increase. For this reason, the hue of the image formed from the light flux emitted from the light source lamp 211A changes in accordance with the cumulative lighting time of the light source lamp 211A.

In addition, each optical element such as a liquid crystal panel 243, each polarizing plate constituting the incident side polarizing plate 242, the exit side polarizing plate 243, and the polarization converting element 214 (hereinafter, the liquid crystal panel 243 and each optical element are collectively referred to as “optical”. The image quality of the image formed by the image forming apparatus 2 changes with time.
Specifically, the optical components of the image forming apparatus 2 excluding the light source lamp 211A are deteriorated by incidence of a light beam emitted from the light source lamp 211A, for example, ultraviolet rays. For this reason, as shown in FIG. 4, the color coordinate value (y coordinate value) of the formed white image tends to increase according to the accumulated usage time of these optical components, and is formed compared to the initial use of the projector 1. The image quality deteriorates.

An approximate expression of the color coordinate value change according to the cumulative lighting time of the light source lamp 211A (the solid line expression in FIG. 3) and an approximate expression of the color coordinate value change according to the cumulative usage time of the optical component (FIG. The change value storage unit 362 stores a solid line formula (4).
Further, the reference value storage unit 363 calculates the color coordinate value (x = 0.328, y = 0.388) of the emitted light beam when the cumulative lighting time of the light source lamp 211A calculated from each approximate expression is 0 hour. The color coordinate value (y = 0.3475) when the accumulated usage time of the optical component is 0 hour is stored as a correction reference value.

Returning to FIG. 1, the image information processing means 31 of the control device 3 digitally processes the image information input to the projector 1 to convert it into digital information that can be internally processed, and outputs the digital information to the image quality correction means 32.
The image quality correction unit 32 performs correction on the image information input from the image information processing unit 31 based on the correction value stored in the correction value storage unit 361 of the storage unit 36. Then, the image quality correction unit 32 outputs the corrected image information to the panel drive unit 33.
The panel driving means 33 is connected to each liquid crystal panel 243 and drives each liquid crystal panel 243 in accordance with input image information. Thereby, an image is formed on each liquid crystal panel 243.

The time measuring unit 34 measures the cumulative driving time of the image forming apparatus 2.
Specifically, the time measuring unit 34 measures the first time counting unit 341 that measures the cumulative lighting time of the light source lamp 211A, and the second time measuring unit 342 that measures the cumulative usage time of the optical components other than the light source lamp 211A in the image forming apparatus 2. And is configured. When the light source lamp 211A is replaced, the first timer 341 resets the cumulative lighting time of the light source lamp 211A and measures the cumulative lighting time of the newly replaced light source lamp 211A. That is, the cumulative driving time of the present invention is the cumulative lighting time of the light source lamp 211A and the cumulative usage time of the optical components in the present embodiment.

  The correction value updating unit 35 stores the accumulated light source lamp 211A timed by the first time measuring unit 341 of the time measuring unit 34 and the accumulated usage time of the optical components timed by the second time measuring unit 342. The correction value stored in the correction value storage unit 361 of the means 36 is updated. The correction value update unit 35 includes a cumulative lighting time acquisition unit 351, a cumulative usage time acquisition unit 352, a change value acquisition unit 353, a correction value generation unit 354, and a correction value update unit 355.

The cumulative lighting time acquisition unit 351 and the cumulative usage time acquisition unit 352 respectively include the cumulative lighting time of the light source lamp 211A and the cumulative usage time of the optical components measured by the first clocking unit 341 and the second clocking unit 342 of the clocking unit 34. To get.
The change value acquisition unit 353 stores the respective color coordinate values corresponding to the cumulative lighting time of the light source lamp 211A acquired by the cumulative lighting time acquisition unit 351 and the cumulative usage time acquisition unit 352 and the cumulative usage time of the optical components. Obtained from the change value storage unit 362 of the means 36.
For example, when the cumulative lighting time and the cumulative usage time are both 500 hours, the change value acquisition unit 353 calculates from the approximate expression of the color coordinate value change of the emitted light beam of the light source lamp 211A stored in the change value storage unit 362. The color coordinate value (x = 0.330, y = 0.391) is acquired, and the color coordinate value (y = 0.349) is acquired from the approximate expression of the color coordinate value of the optical component.

The correction value generation unit 354 includes the color coordinate value of the emitted light beam according to the cumulative lighting time of the light source lamp 211A acquired by the change value acquisition unit 353, and the color coordinate value of the white image according to the cumulative usage time of the optical component. Thus, a correction value suitable for the current state of the image forming apparatus 2 is generated.
Specifically, the correction value generation unit 354 firstly, among the correction reference values stored in the reference value storage unit 363 of the storage unit 36, the color coordinate value (x = x) that is the correction reference value of the light beam emitted from the light source lamp 211A. 0.328, y = 0.388) and a color coordinate value (y = 0.3475) which is a correction reference value of the white image formed by the optical component. Then, the correction value generation unit 354 matches the color coordinate value of the emitted light beam according to the cumulative lighting time of the light source lamp 211A acquired by the change value acquisition unit 353 with the correction reference value related to the emitted light beam, and the change value acquisition unit. A correction value for newly matching the color coordinate value of the white image corresponding to the accumulated usage time of the optical component acquired in step 353 with the correction reference value related to the white image is generated.

For example, when both the cumulative lighting time of the light source lamp 211A and the cumulative usage time of the optical component are 500 hours, the correction value generation unit 354 has a color related to the emitted light flux of the light source lamp 211A acquired by the change value acquisition unit 353. The coordinate values (x = 0.330, y = 0.391) are adjusted to color coordinate values (x = 0.328, y = 0.388), which are correction reference values related to the light flux emitted from the light source lamp 211A. Then, a correction value for adjusting the color coordinate value (y = 0.349) of the white image formed by the optical component to the color coordinate value (y = 0.375) that is the correction reference value related to the white image is generated. .
Then, the correction value update unit 355 updates the correction value stored in the correction value storage unit 361 of the storage unit 36 with the correction value generated by the correction value generation unit 354.

(1-4) Image Quality Adjustment Processing FIG. 5 is a diagram illustrating a processing flow of image quality adjustment processing by the control device 3.
The control device 3 of the present embodiment always executes image quality adjustment processing described below, and stores it in the correction value storage unit 361 of the storage unit 36 according to the cumulative lighting time of the light source lamp 211A and the cumulative usage time of the optical components. The correction value thus updated is updated, and the image quality correction unit 32 adjusts the image quality of the formed image based on the correction value, thereby adjusting the image quality of the formed image according to the current situation of the image forming apparatus 2.
In this image quality adjustment process, as shown in FIG. 5, first, the cumulative lighting time acquisition unit 351 of the correction value updating unit 35 calculates the cumulative lighting time of the light source lamp 211 </ b> A measured by the first clocking unit 341 of the clocking unit 34. Obtain (step S11).
Then, the accumulated usage time acquisition unit 352 of the correction value update unit 35 acquires the accumulated usage time of the optical component measured by the second timing unit 342 of the timing unit 34 (step S12).

Next, the change value acquisition unit 353 from the change value storage unit 362 of the storage unit 36, the color coordinate value of the emitted light beam according to the cumulative lighting time acquired by the cumulative lighting time acquisition unit 351, and the cumulative usage time acquisition unit 352. The color coordinate value of the white image corresponding to the accumulated usage time acquired in step S13 is acquired (step S13).
Thereafter, the correction value generation unit 354 uses the color coordinate values, which are correction reference values related to the luminous flux emitted from the light source lamp 211A, stored in the reference value storage unit 363 of the storage unit 36, and the correction reference values related to the white image. Get a color coordinate value. Then, the correction value generation unit 354 generates a correction value for adjusting each color coordinate value acquired by the change value acquisition unit 353 to each color coordinate value that is a correction reference value (step S14).

Then, the correction value update unit 355 updates the correction value stored in the correction value storage unit 361 of the storage unit 36 with the correction value generated by the correction value generation unit 354 (step S15).
Thereafter, the image quality correction unit 32 corrects the image information input from the image information processing unit 31 based on the correction value stored in the correction value storage unit 361, and outputs the corrected image information to the panel driving unit 33. An image with corrected image quality is formed by the drive means 33 (step S16).
Thus, the image quality adjustment process ends.

According to the projector 1 of the present embodiment as described above, the following effects can be obtained.
That is, the color coordinate value of the emitted light beam according to the cumulative lighting time of the light source lamp 211A measured by the first time measuring unit 341 of the time measuring unit 34 and the cumulative usage time of the optical components timed by the second time measuring unit 342. The change value acquisition unit 353 of the correction value update unit 35 acquires the color coordinate value of the corresponding white image from the change value storage unit 362 of the storage unit 36. Then, the correction value generation unit 354 adjusts each color coordinate value acquired by the change value acquisition unit 353 to the color coordinate value that is each correction reference value stored in the reference value storage unit 363 of the storage unit 36. A correction value is newly generated. Then, the correction value update unit 355 updates the correction value stored in the correction value storage unit 361 with the generated correction value.
According to this, since the image quality of the image formed by the current image forming apparatus 2 can be matched with the correction reference value, the image quality correction of the image formed by the image forming apparatus 2 can be performed appropriately and It can be done easily.
In addition, since the correction value stored in the correction value storage unit 361 is constantly updated, it is not necessary for the user to make troublesome image quality adjustments, and an image whose image quality is always appropriately corrected can be formed.

  In addition, the correction value update unit 35 updates the correction value used when correcting the image quality of the formed image according to the cumulative lighting time of the light source lamp 211A and the cumulative usage driving time of the optical components. There is no need to carry the projector 1 to a factory or the like for image quality adjustment. Therefore, it is possible to easily adjust the image quality of the formed image.

  Further, the correction value generation unit 354 of the correction value update unit 35 converts the color coordinate value of the emitted light beam according to the cumulative lighting time of the light source lamp 211A and the color coordinate value of the white image according to the cumulative usage time of the optical component. Based on this, a correction value for adjusting each color coordinate value to the correction reference value is generated. According to this, it is possible to correct the image quality of the formed image in accordance with the deterioration of the light source lamp 211A and the optical components that have a great influence on the image quality of the image formed by the image forming apparatus 2. Accordingly, it is possible to form and project an image with more appropriate image quality correction.

  In addition, when the light source lamp 211A is replaced, the first time measuring unit 341 of the time measuring unit 34 resets the accumulated lighting time that has been timed and measures the cumulative lighting time of the newly replaced light source lamp 211A. According to this, even when the light source lamp 211A is replaced due to the lifetime or the like, the cumulative lighting time of the light source lamp 211A newly attached to the projector 1 can be accurately measured, and thus the correction value can be updated. Can be done appropriately. Therefore, the image quality correction according to the current image forming status of the image forming apparatus 2 can be performed reliably and appropriately.

[2. Second Embodiment]
Next, a projector 1A according to a second embodiment of the invention will be described.
The projector 1A of the present embodiment has the same configuration as that of the projector 1 shown in the first embodiment, but is different from the projector 1 in that the image quality adjustment can be manually performed. In the following description, parts that are the same as or substantially the same as those already described are assigned the same reference numerals and description thereof is omitted.

(2-1) Overall Configuration of Projector 1A FIG. 6 is a block diagram showing the configuration of the projector 1A according to this embodiment.
Similarly to the projector 1 described above, the projector 1A forms an image according to input image information and projects the image onto the screen SC. As shown in FIG. 6, the projector 1A includes an image forming apparatus 2, a control apparatus 3A, an operation panel 4, and a remote control IF 5.
Among these, the operation panel 4 is provided with an image quality adjustment key 41 for displaying a menu screen for adjusting the image quality of an image formed and projected by the projector 1. The remote controller 9 is also provided with a similar image quality adjustment key 91, and an infrared signal output from the remote controller 9 together with the input of the image quality adjustment key 91 is received by the remote controller IF 5.

(2-2) Configuration of Control Device 3A The control device 3A controls the entire device including lighting of the light source lamp 211A of the image forming apparatus 2 and driving of the liquid crystal panel 243, similarly to the control device 3 described above. The control device 3A includes an image information processing unit 31, an image quality correcting unit 32, a panel driving unit 33, a time measuring unit 34, a correction value updating unit 35A, a storage unit 36, and a menu display unit 37.

Among these, the correction value updating unit 35A is similar to the correction value updating unit 35 described above, in accordance with the cumulative lighting time of the light source lamp 211A and the cumulative usage time of the optical components constituting the image forming apparatus 2, and The correction value stored in the correction value storage unit 361 is updated to adjust the image quality of the formed image. The correction value updating unit 35A is configured to be able to manually adjust the image quality of the formed image by an operation on the projected menu screen.
The correction value update unit 35A includes an accumulated lighting time acquisition unit 351, an accumulated usage time acquisition unit 352, a change value acquisition unit 353, a correction value generation unit 354A, a reference value update unit 356, and a correction value update unit 355A. ing.

  Among these, the correction value generation unit 354A corresponds to the color coordinate value of the emitted light beam of the light source lamp 211A corresponding to the cumulative lighting time of the light source lamp 211A acquired by the change value acquisition unit 353 and the cumulative usage time of the optical component. Correction for adjusting the color coordinate value of the white image formed by the optical component to the correction reference value related to the emitted light beam and the correction reference value related to the white image stored in the reference value storage unit 363 of the storage unit 36 Generate a new value. Further, the correction value generation unit 354A adds the color coordinate value of the emitted light beam according to the cumulative lighting time and the white image according to the cumulative usage time to each correction reference value updated by the reference value update unit 356 described later. A correction value for adjusting the color coordinate value is newly generated. The correction value generation unit 354A temporarily stores the generated correction values in the storage unit 36.

The reference value update unit 356 updates the correction reference value according to an operation on an image quality adjustment menu screen (hereinafter, may be abbreviated as “image quality adjustment screen”) formed by the menu display unit 37 described later.
When the OK key K1 (see FIG. 7) is input on the image quality adjustment screen, the correction value update unit 355A stores the correction value generated by the correction value generation unit 354A in the correction value storage unit 361 of the storage unit 36. Update the correction value.

FIG. 7 is a diagram illustrating an example of the image quality adjustment menu screen.
The menu display unit 37 generates image information of a menu screen for performing various settings of the projector 1, and outputs the image information to the panel driving unit 33, thereby causing the image forming apparatus 2 to form a menu screen. The menu display unit 37 receives an infrared signal that is output when the image quality adjustment key 41 of the operation panel 4 is input or when the image quality adjustment key 91 of the remote controller 9 is input and the image quality adjustment key 91 is input. When the remote control IF 5 receives light, for example, an image quality adjustment screen VM as shown in FIG. 7 is generated.

  Specifically, the menu display unit 37 forms the image quality adjustment screen VM as an OSD (On Screen Display) menu displayed in the display area DA of the projection image projected from the projector 1. Then, the menu display unit 37 displays the color display area CA, the scroll bar SB, the OK key K1, and the cancel key K2 in the menu display area MA constituting the image quality adjustment screen VM.

In the color display area CA, color patterns of cyan (C), magenta (M), yellow (Y), white (W), red (R), green (G), and blue (B) are displayed in order from the left. Is done.
The scroll bar SB is displayed so as to switch the display state of each color displayed in the color display area CA by moving left and right by the operation of the operation panel 4 and the remote controller 9 by the user. Note that the movable bar of the scroll bar SB is located on the leftmost side in the initial display state.
The OK key K1 is a key that is input when setting the image quality of the formed image to the image quality set on the image quality adjustment screen VM, and the cancel key K2 is input when canceling the set image quality. Key to be played.

Here, the image quality adjustment on the image quality adjustment screen VM will be described.
The menu display unit 37 first generates image information of the image quality adjustment screen VM. The menu display unit 37 corrects the image information of the generated image quality adjustment screen VM according to the correction value generated by the correction value generation unit 354A and temporarily stored in the storage unit 36, and displays the image information. It outputs to the panel drive means 33. For this reason, in the initial display state of the image quality adjustment screen VM, the color pattern displayed in the color display area CA displays each color that has been subjected to image quality correction based on the correction value generated by the correction value generation unit 354A.

  Thereafter, when the user operates the scroll bar SB, the reference value update unit 356 uses the correction reference value related to the emitted light beam of the light source lamp 211A stored in the reference value storage unit 363 of the storage unit 36 as the light source. The lamp 211A is updated so as to fluctuate on the approximate straight line (see FIG. 3) of the cumulative lighting time of the lamp 211A-the color coordinate value (x coordinate value and y coordinate value) of the emitted light beam, and a white image formed by the optical component is also displayed. The correction reference value is updated so as to vary on the approximate straight line (see FIG. 4) of the accumulated usage time of the optical component−the color coordinate value of the white image.

  Specifically, on the image quality adjustment screen VM, when the scroll bar SB is moved to the right side shown in FIG. 5 by the user's operation, the cumulative lighting time of the light source lamp 211A shown in FIG. A color coordinate value (x coordinate value and y coordinate value) which is a correction reference value of the emitted light beam is increased along the approximate straight line, and the accumulated usage time of the optical component shown in FIG. 4-approximation of the color coordinate value of the white image A color coordinate value, which is a correction reference value of the white image, is increased along the straight line. That is, when the scroll bar SB is moved to the right side, the color coordinate values (x coordinate value and y coordinate value) that are correction reference values related to the emitted light beam indicated by the dotted line in FIG. 3 move upward, and in FIG. The color coordinate value, which is the correction reference value related to the white image indicated by the dotted line, moves upward.

  On the image quality adjustment screen VM, when the scroll bar SB is moved to the left as shown in FIG. 5 by the user's operation, the correction is performed along the approximate straight line of the cumulative lighting time of the light source lamp 211A-the color coordinate value of the emitted light beam. The color coordinate value (x coordinate value and y coordinate value) which is the reference value is decreased, and the correction reference for the white image is taken along the approximate straight line of the accumulated use time of the optical component-the color coordinate value of the white image shown in FIG. Decrease the color coordinate value. That is, when the scroll bar SB is moved to the left, the correction reference value related to the emitted light beam indicated by the dotted line in FIG. 3 moves downward, and the correction reference value related to the white image indicated by the dotted line in FIG. Moving.

The correction value generation unit 354A then outputs the color coordinate value of the emitted light beam according to the current cumulative lighting time obtained from the approximate straight line shown in FIGS. 3 and 4 and the color coordinate value of the white image according to the cumulative usage time. Is newly generated as a correction value to be adjusted to each correction reference value after movement. Then, the correction value generation unit 354A temporarily stores the correction value in the storage unit 36.
After that, the menu display unit 37 is a correction value newly generated by the correction value generation unit 354A and temporarily stored in the storage unit 36, and cyan (C), magenta (M), yellow (Y), white The color patterns of (W), red (R), green (G), and blue (B) are corrected, and the color patterns are displayed in the color display area CA of the image quality adjustment screen VM. As a result, the user can visually grasp how the image quality is adjusted.

When the OK key K1 is input by the user's operation on the image quality adjustment screen VM, the correction value update unit 355A uses the correction value temporarily stored in the storage unit 36 to correct the storage unit 36. The correction value stored in the value storage unit 361 is updated.
On the other hand, when the cancel key K2 is input by an operation on the image quality adjustment screen VM, the menu display unit 37 stops image formation on the image quality adjustment screen VM, and the panel drive unit 33 performs image information processing. The liquid crystal panel 243 is driven according to image information input from the means 31 via the image quality correction means 32, and an image corresponding to the image information is formed. When the cancel key K2 is input and the correction reference value stored in the reference value storage unit 363 of the storage unit 36 has already been updated, the correction reference value is updated to the value before the update. return.

(2-3) Image Quality Adjustment Processing FIG. 8 is a diagram illustrating a processing flow of image quality adjustment processing by the control device 3A.
The control device 3A of the present embodiment performs image quality adjustment by executing image quality adjustment processing described below. In the image quality adjustment process of the present embodiment, the image quality adjustment process of the first embodiment described above is always executed, whereas the image quality adjustment keys 41 and 91 of the operation panel 4 or the remote controller 9 are input by the user. Executed.
In this image quality adjustment process, as shown in FIG. 8, first, the same processes as S11 to S14 of the image quality adjustment process of the first embodiment described above are executed. That is, in the image quality adjustment process, when the image quality adjustment keys 41 and 91 are input, the cumulative lighting time acquisition unit 351 constituting the correction value update unit 35A of the control device 3A measures the time by the first timer unit 341 of the timer unit 34. The accumulated lighting time of the light source lamp 211A thus obtained is acquired (step S21).
Then, the accumulated usage time acquisition unit 352 acquires the accumulated usage time of the optical component measured by the second timing unit 342 of the timing unit 34 (step S22).

Next, the change value acquisition unit 353 is formed of the optical component based on the color coordinate value of the emitted light beam of the light source lamp 211A based on the acquired cumulative lighting time of the light source lamp 211A and the cumulative usage time of the optical component. The color coordinate value of the white image is acquired from the change value storage unit 362 of the storage unit 36 (step S23).
Thereafter, the correction value generation unit 354A uses the acquired color coordinate value of the emitted light beam and the color coordinate value of the white image as a correction reference value related to the emitted light beam of the light source lamp 211A stored in the reference value storage unit 363, and Then, a correction value to be adjusted to the correction reference value relating to the white image formed by the optical component is generated, and the correction value is temporarily stored in the storage unit 36 (step S24).

  Then, the menu display unit 37 generates image information of the image quality adjustment screen VM, outputs the image information to the panel drive unit 33, and forms the image quality adjustment screen VM (step S25). At this time, the menu display unit 37 displays the color pattern corrected by the correction value generated by the correction value generation unit 354A and temporarily stored in the storage unit 36 in the color display area CA on the image quality adjustment screen VM.

When the scroll bar SB is moved by a user operation on the image quality adjustment screen VM, the reference value update unit 356 is stored in the reference value storage unit 363 according to the position of the scroll bar SB. The correction reference value relating to the light flux emitted from the light source lamp 211A and the correction reference value relating to the white image formed by the optical component are updated (step S26).
Then, the correction value generation unit 354A newly generates a correction value corresponding to the updated correction reference value (step S27), and temporarily stores the correction value in the storage unit 36. As a result, a color pattern that has been corrected based on the newly generated correction value is displayed in the color display area CA of the image quality adjustment screen VM.

When the OK key K1 of the image quality adjustment screen VM is input by the user's operation, the correction value update unit 355A uses the correction value temporarily stored in the storage unit 36 and the correction value stored in the storage unit 36. The correction value stored in the storage unit 361 is updated (step S28).
Thereafter, the image quality correction unit 32 refers to the correction value stored in the correction value storage unit 361 and updates the image information input from the image information processing unit 31 based on the correction value. The image information is output to the panel driving unit 33. Thereby, image quality correction based on the newly set correction value is performed (step S29).
Thus, the image quality adjustment process ends.

According to the projector 1A of the present embodiment as described above, the same effects as the projector 1 shown in the first embodiment can be obtained, and the following effects can be obtained.
That is, the menu display unit 37 causes the image forming apparatus 2 to form the image quality adjustment screen VM, and the reference value update unit 356 of the correction value update unit 35 responds to the operation on the image quality adjustment screen VM. The correction reference value stored in the reference value storage unit 363 is updated. According to this, the correction value can be updated according to the updated correction reference value. Therefore, the image quality of the formed image can be easily adjusted according to the user's preference.
In the image quality adjustment screen VM, the color pattern corrected based on the correction value corresponding to the updated correction reference value is displayed in the color display area, so that the user executes the image quality adjustment operation while checking the color pattern. can do. Therefore, image quality adjustment can be easily performed.

[3. Modification of Embodiment]
It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
For example, in the first embodiment, the image quality adjustment processing is always performed when the power of the projector 1 is input and image formation is performed by the image forming apparatus 2, but the cumulative lighting of the light source lamp 211A is performed. You may make it implement when time and the accumulated use time of an optical component have passed predetermined time.
In the second embodiment, when the image quality adjustment keys 41 and 91 are input, the image quality adjustment process is executed. However, as in the projector 1 of the first embodiment described above, the cumulative lighting time of the light source lamp 211A. In addition, the correction value may be generated and updated according to the accumulated usage time of the optical component. In such a case, when the image quality adjustment keys 41 and 91 are input, the menu display unit 37 forms the image quality adjustment screen VM, and the reference value update unit 356 sets the correction reference value by the operation on the image quality adjustment screen VM. Update it. Then, the update of the correction value that is automatically performed thereafter may be performed according to the updated correction reference value.

  In each of the above-described embodiments, the cumulative driving time of the image forming apparatus 2 is the cumulative lighting time of the light source lamp 211A and the cumulative usage time of the optical components. However, the present invention is not limited to this and may be either one. . Further, when the liquid crystal panel 243 and other optical elements are configured to be replaceable, the accumulated usage time may be counted independently.

In each of the above embodiments, the configuration in which the image forming apparatus 2 has a substantially L shape in plan view has been described. However, the configuration is not limited thereto, and for example, a configuration having a substantially U shape in plan view may be employed.
In each of the above embodiments, the transmissive liquid crystal panel 243 having a different light beam incident surface and light beam emission surface is used. However, a reflection type liquid crystal panel having the same light incident surface and light emission surface is used. Also good.
Furthermore, although the three liquid crystal panels 243R, 243G, and 243B are used in the projector 1 of each embodiment, the present invention is not limited to this. That is, the present invention can also be applied to a projector using two, or four or more liquid crystal panels.

  In each of the embodiments, the projector 1 including the liquid crystal panel 243 is exemplified as the light modulation device. However, the light modulation device may have other configurations as long as the light modulation device forms an optical image by modulating incident light according to image information. You may employ | adopt a light modulation apparatus. For example, the present invention can also be applied to a projector using a light modulation device other than the liquid crystal layer, such as a device using organic EL (ElectroLuminescence) or a micromirror. When such a light modulation device is used, the polarizing plates 242 and 244 on the light beam incident side and the light beam emission side can be omitted.

In each of the above embodiments, only the front type projector 1 that projects an image from the direction of observing the screen is illustrated, but the present invention is a rear type projector that projects an image from the side opposite to the direction of observing the screen. Is also applicable.
In each of the above-described embodiments, the projector is exemplified as the image display device. However, the present invention is not limited to this, and the present invention is not limited to this. Applicable.

  The present invention can be used not only for projectors but also for image display devices such as displays.

1 is a block diagram showing a configuration of a projector according to a first embodiment of the invention. FIG. 2 is a schematic diagram showing an optical system of the image forming apparatus in the embodiment. The figure which shows the time-dependent change characteristic of the emitted light beam of the light source lamp in the said embodiment. The figure which shows the time-dependent change characteristic of the white image formed with the optical component in the said embodiment. The figure which shows the processing flow of the image quality adjustment process in the said embodiment. The block diagram which shows the structure of the projector which concerns on 2nd Embodiment of this invention. The figure which shows an example of the image quality adjustment menu screen in the said embodiment. The figure which shows the processing flow of the image quality adjustment process in the said embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Projector (image display apparatus), 2 ... Image forming apparatus, 3 ... Control apparatus, 4 ... Operation panel (operation means), 9 ... Remote control (operation means), 32 ... Image quality correction means, 34 ... Time measuring means, 35 ... Correction value update means, 36 ... storage means, 37 ... menu display means, 211A ... light source lamp (light source), 243 (243R, 243G, 243B) ... liquid crystal panel (light modulation device), 341 ... first timer, 342 ... Second timing unit, 354, 354A ... correction value generation unit, 355, 355A ... correction value update unit, 356 ... reference value update unit, 361 ... correction value storage unit, 362 ... change value storage unit, 363 ... reference value storage unit .

Claims (6)

An image display device comprising: an image forming apparatus that forms an image according to input image information; and a control device that controls the entire apparatus including the image forming apparatus.
The controller is
A correction value storage unit that stores a correction value for correcting the image quality of an image formed by the image forming apparatus to a predetermined image quality;
A storage unit having a change value storage unit that stores the accumulated drive time of the image forming apparatus and the change value of the image quality of the formed image that changes according to the accumulated drive time;
Image quality correction means for correcting the image quality of the formed image based on the correction value;
Clocking means for clocking the cumulative drive time of the image forming apparatus;
Correction value updating means for updating the correction value based on the change value corresponding to the accumulated drive time measured by the time measuring means;
An image display device comprising: The image display device according to claim 1,
The storage means
A reference value storage unit for storing a correction reference value indicating the predetermined image quality;
The correction value update means includes
A correction value generating unit that generates a correction value for adjusting the change value to the correction reference value;
A correction value update unit that updates the correction value stored in the correction value storage unit with the correction value generated by the correction value generation unit;
An image display device comprising: The image display device according to claim 2,
An operation means for outputting an operation signal for causing the control device to execute a predetermined operation;
The controller is
The image forming apparatus comprises menu display means for forming a menu screen for adjusting the image quality of the formed image,
The correction value update means includes
An image display device comprising: a reference value update unit that updates the correction reference value according to the operation signal input from the operation means during display of the menu screen. The image display device according to any one of claims 1 to 3,
The image forming apparatus includes:
A light source;
A light modulation device that modulates a light beam emitted from the light source according to the image information to form the image;
An optical element disposed on the optical path of the light beam emitted from the light source and optically converting the incident light beam;
The timing means is
A first timer for measuring the cumulative lighting time of the light source;
A second timer for measuring the accumulated usage time of at least one of the light modulator and the optical element;
The image display device, wherein the cumulative drive time includes the cumulative lighting time measured by the first time measuring unit and the cumulative use time measured by the second time measuring unit. The image display device according to claim 4,
The light source is configured to be replaceable,
The said 1st time measuring part resets the said cumulative lighting time, if the said light source is replaced | exchanged, The image display apparatus characterized by the above-mentioned. In the image display device according to claim 4 or 5,
The image display apparatus characterized in that the change value includes at least one of a color coordinate value of a white image formed by the image forming apparatus and a color coordinate value of a light beam emitted from the light source.

Images