WO2006049270A1 - ヘッドマウントディスプレイ - Google Patents
ヘッドマウントディスプレイ Download PDFInfo
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- WO2006049270A1 WO2006049270A1 PCT/JP2005/020335 JP2005020335W WO2006049270A1 WO 2006049270 A1 WO2006049270 A1 WO 2006049270A1 JP 2005020335 W JP2005020335 W JP 2005020335W WO 2006049270 A1 WO2006049270 A1 WO 2006049270A1
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- 230000000007 visual effect Effects 0.000 claims description 41
- 238000012937 correction Methods 0.000 claims description 32
- 238000009499 grossing Methods 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 235000019557 luminance Nutrition 0.000 description 49
- 230000006870 function Effects 0.000 description 32
- 239000004973 liquid crystal related substance Substances 0.000 description 19
- 210000003128 head Anatomy 0.000 description 15
- 238000010586 diagram Methods 0.000 description 13
- 238000004364 calculation method Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 238000012545 processing Methods 0.000 description 5
- 239000003086 colorant Substances 0.000 description 4
- 238000005401 electroluminescence Methods 0.000 description 4
- 238000007405 data analysis Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000012935 Averaging Methods 0.000 description 2
- 210000004556 brain Anatomy 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000013139 quantization Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 210000000887 face Anatomy 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 238000010191 image analysis Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
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- G06T5/92—
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/422—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
- H04N21/42202—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS] environmental sensors, e.g. for detecting temperature, luminosity, pressure, earthquakes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
- H04N21/4318—Generation of visual interfaces for content selection or interaction; Content or additional data rendering by altering the content in the rendering process, e.g. blanking, blurring or masking an image region
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/57—Control of contrast or brightness
- H04N5/58—Control of contrast or brightness in dependence upon ambient light
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
- H04N5/7475—Constructional details of television projection apparatus
- H04N5/7491—Constructional details of television projection apparatus of head mounted projectors
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/0118—Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/014—Head-up displays characterised by optical features comprising information/image processing systems
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
- G09G2360/144—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light being ambient light
Definitions
- the present invention relates to a head-mounted display that is mounted on the head and has a function of displaying an image on the eyes of the wearer.
- a spectacle type that observes an image displayed on a display device such as a liquid crystal panel (LCD) as a virtual image enlarged through an optical system having an eyepiece or a half mirror.
- LCD liquid crystal panel
- Various video display devices have been proposed and are called wearable displays. Of these, the one that is worn on the head is called a head-mounted display.
- the head-mounted display is often configured to be worn on the head in the shape of a head, and is compatible with either the binocular type with a video display system in the position corresponding to both eyes or one of the left and right eyes.
- a one-eye type in which a video display system is formed at the position where it moves.
- the binocular type is mainly used for the purpose of enjoying video.
- One-eye type devices are expected to be used as display devices such as wearable personal computers and display devices that display instructions to workers.
- a system as disclosed in Japanese Patent Application Laid-Open No. 8-3 0 5 2 98 is known.
- the display unit In such a head-mounted display, the display unit is used in front of the eye, but it is desirable that it is always in front of the eye (there is no other work, so I want to be disturbed elsewhere) If not, if it ’s in front of your eyes There are various situations, such as when you don't want it or when you want to use it again. Therefore, it is preferable that the display unit can be moved from the front of the eye while being worn on the head.
- Such a head-mounted display is described in, for example, Japanese Patent Application Laid-Open No. 2 00 4 1 2 0 7 8 4 7.
- the outline is shown in Figure 4.
- the head mounted display 21 is composed mainly of a rear arm 2 2, a display arm 2 3, a display section 2 4, and an ear pad section 25.
- the display unit 24 is attached to the tip of the display arm 23, and the rear part of the strip-shaped display arm 23 is housed in the hollow part of the rear arm 22 and has the shape of the wearer's head. It can be expanded and contracted together.
- the ear pad 25 is fixed to the rear arm 22 and is configured to press the wearer's ear by the elastic biasing force of the rear arm 22.
- the display arm 2 3 is housed only on one side of the rear arm 22, and when the display unit 24 is placed in front of the left eye, it is shown in FIG. (The solid line indicates the case where the display arm 23 and the display unit 24 are in the stowed position, and the two-dot chain line indicates the image with the display unit 24 positioned in front of the wearer's eyes.
- the display unit 24 is placed in front of the right eye, rotate it 180 ° from the posture shown in Fig. 4 and use it in a posture that is upside down, left and right. Disclosure of the invention
- the present invention has been made in view of such circumstances, and provides a head-mounted display capable of clearly viewing an image even when the amount of light entering an eye not displaying the image changes. Is an issue.
- a first means for solving the above problem is a head mounted display having a display unit for displaying an image corresponding to the source image information on one eye of the wearer.
- It is a characteristic head mount display.
- Visual characteristics refers to the luminance data of pixels actually captured by an imaging element and recorded as source image data, and when the pixels having the luminance data are displayed. This is the relationship with the brightness perceived by the actual human eye. Generally, it changes depending on the amount of light entering the eye opposite to the eye displaying the image, and also the average brightness of the source image information. Is.
- the luminance data of the source image data is multiplied by a factor proportional to the amount of light entering the eye on the side where the display unit is not attached (in most cases, the amount of external light), and the luminance of that value is If the display is bright, the image will be brighter when there is a large amount of light entering the eye on the side where the display is not attached, and conversely, the amount of light entering the eye on the side where the display is not attached will be small. When It seems that the above problem is solved when the image becomes darker. However, the visual characteristic has the property that when the same image is viewed in a bright place, the dark part appears darker, and when viewed in a dark place, the bright part appears brighter. In addition, it is not sufficient to change the brightness of the image in proportion to the amount of light entering the eye on the side where the display unit is not mounted.
- the relationship between the luminance information for each pixel of the source image information and the luminance of the image actually displayed is determined for each screen in consideration of the visual characteristics of the human eye. Since an image having a brightness determined based on the relationship can be displayed on the display unit, an image that can be clearly seen can be displayed even when the amount of light entering the eye on the side where the display unit is not attached changes.
- the second means for solving the problem is the first means, wherein a plurality of visual characteristics are prepared, and used depending on the step of the light quantity measured by the light quantity sensor. It is characterized by having the function of selecting visual characteristics.
- the stage is determined according to the light quantity measured by the light quantity sensor ', and the visual characteristic to be used is changed according to the stage. Therefore, the visual characteristic is expressed as a function of the light quantity measured by the light quantity sensor. It is no longer necessary and correction is simple.
- a third means for solving the problem is the first means, calculating an average value of luminance of each pixel of the source image information corresponding to one screen, and calculating the average value,
- the visual characteristic is determined based on the relationship with the light quantity measured by the light quantity sensor.
- the average brightness of a single displayed image varies depending on the image, the image can only be seen by the amount of light measured by the light amount sensor. It depends on the average brightness of each screen.
- the average value of the luminance of each pixel of the source image information corresponding to one screen is calculated, and based on the relationship between the calculated average value and the light quantity measured by the light quantity sensor, Since it has a function to determine visual characteristics, a clear image can be visually recognized even in such a case.
- a fourth means for solving the above problem is a head-mounted display having a display unit for displaying an image corresponding to the source image information on one eye of the wearer.
- a light amount sensor for measuring the amount of light incident on the opposite eye; and means for prefetching a predetermined number of screen source image information; the amount of light measured by the light amount sensor; and the predetermined amount pre-read every predetermined number From the average luminance information obtained by averaging the luminances of the source image information on the number of screens and the predetermined visual characteristics, luminance information for each pixel included in the source image information and the luminance of the image actually displayed are obtained.
- the head-mounted display is characterized in that the relationship is determined for each screen, the luminance information of the source image information is corrected according to the determined relationship, and the image is displayed based on the correction result.
- the basic function of this means is the same as that of the first means, but in this means, the brightness correction processing is not performed for each screen, but the number of images to be displayed is predetermined.
- the source image information of the group of images is prefetched.
- the average luminance information is formed by taking the average value of luminance for the source image information of the predetermined number of screens.
- luminance information in the source image information is corrected according to the determined relationship, and an image is displayed based on the correction result.
- correction is applied for each image, and there is a force that looks unnatural when looking at a series of images (especially moving images).
- S the correction value Is calculated for each predetermined number of images, and since the same correction value is used in a predetermined number of images, such unnaturalness can be eliminated.
- a fifth means for solving the above problem is a head mounted display having a display unit for displaying an image corresponding to the source image information on one eye of the wearer.
- a light amount sensor that determines the amount of light incident on the eye opposite to the eye, and means for pre-reading the source image information of a predetermined number of screens, the light amount measured by the light amount sensor, and the predetermined number of pre-reads Only o From the average luminance information obtained by moving and averaging the luminance of the source image information of the screen, and the predetermined visual characteristics, the luminance information for each pixel included in the source image information and the luminance of the image displayed at that time
- a head-mounted display characterized by having a function that determines the relationship for each screen and corrects the luminance information of the source image information and displays the image based on the correction result.
- the average luminance information is formed by taking an average value of luminance for the source image information of the screen image of the batch read in advance, and the average luminance of the source image information of the batch screen is obtained.
- the average brightness information was formed using the values and used for brightness correction.
- the average luminance information changes for each source image information of a group of screens, so the average luminance information changes in a step shape at the boundary of the screen of each group.
- a sixth means for solving the above problem is a head-mounted display having a display unit for displaying an image corresponding to the source surface image information on one eye of the wearer.
- a fe amount sensor that measures the amount of light incident on the opposite eye, and means for pre-reading a predetermined number of screen source image information, the amount of light measured by the pre-ready light amount sensor, and the source image information of the pre-read screen
- the relationship between the luminance information for each pixel of the source image information and the luminance of the actually displayed image is obtained for each screen from the exponential smoothed luminance information obtained by exponentially smoothing the luminance of the image and the predetermined visual characteristics.
- the head-mounted display has a function of correcting the luminance information of the source image information in accordance with the determined relationship and displaying an image based on the correction result.
- the seventh means for solving the problem is any one of the fourth means to the sixth means, wherein a plurality of visual characteristics are prepared, and the light quantity measured by the light quantity sensor It has a function of selecting the visual feature to be used according to the stage.
- FIG. 1 is a block diagram showing an image display control unit of a head mount display according to an embodiment of the present invention.
- FIG. 6 is a diagram illustrating a correction relationship between brightness information of an image output after correction and the correction.
- FIG. 3 shows a head-mounted display according to another embodiment of the present invention. It is a block diagram which shows an image display control part.
- FIG. 4 is a diagram showing the structure of a known head-mounted display.
- FIG. 5 is a diagram showing the structure of a head mount display which is another embodiment of the present invention.
- FIG. 6 is a diagram showing an outline of the control circuit of the head mounted display shown in FIG.
- FIG. 7 is a diagram showing an example of an image formed on the liquid crystal element.
- FIG. 8 is a diagram showing another example of an image formed on the liquid crystal element. BEST MODE FOR CARRYING OUT THE INVENTION
- the configuration of the head-mount display main body may be the same as that of the conventional one shown in FIG. 4 and is not directly related to the main part of the present invention.
- FIG. 1 is a block diagram showing an image display control unit of a head mounted display according to an embodiment of the present invention.
- the memory (not shown) of the moving image data holding device 1 stores source image information of moving images to be displayed. This source image information is sent to the image quality adjustment amount calculation unit 2 every minute corresponding to one screen.
- the image quality adjustment amount calculation unit 2 receives the signal from the external light measurement unit 3 and corrects the brightness of the image data as described later.
- the image data that has been subjected to the brightness correction is sent to the moving image data reproducing unit 4 to be converted into image data and displayed on the image display device 5 of the display unit.
- the external light measuring device is provided on the back side of the display unit 24 in FIG. 4 (the side opposite to the direction facing the eye) and measures the amount of external light. Since the amount of external light is considered to be equal to the amount of light that enters the eye that is not used for image display, this allows the amount of light that enters the eye that is not used for image display. Can be measured.
- the position of each pixel in the image corresponding to one screen sent from the moving image data holding device 1 is indicated by (X, y), and the luminance of the corresponding source image information is I. This is indicated by (X, y).
- the output of the external light measurement unit 3 is ⁇ .
- the image quality adjustment amount calculation unit 2 calculates the luminance I of the source image information.
- This function f ( ⁇ , ⁇ ) corresponds to visual characteristics.
- the output I of this function is
- the luminance I of the source image information is indicated by Is corrected for each pixel according to equation (1) according to the measured light quantity ⁇ .
- the brightness of each pixel is
- the luminance data in the image data sent from the image quality adjustment amount calculation unit 2 to the moving image data reproduction unit is converted to I (X, y).
- the function f ( ⁇ ., ⁇ ) can also be given as a function form, and the light quantity ⁇ may be quantized to have a look-up table form at each quantized stage. If the function form becomes complicated, the light quantity ⁇ may be quantized to have a different function form at each quantized stage.
- the function f ( ⁇ , ⁇ ) corrects the image so that it looks natural when the image is viewed with the light measured by the light sensor in the eyes not using the display device. It has a functional form and can be determined as appropriate by those skilled in the art in consideration of the characteristics of the light quantity sensor, the sensor of the imaging device when taking an image, and the characteristics of the human eye. In short, it has the following properties.
- Figure 2 (a) shows I when the light intensity ⁇ is in the standard state. And a graph showing the relationship between I and I. When the amount of light ⁇ increases from this state, all I.
- the graph shown by the broken line in Fig. 2 (b) shows that I is increased at the same magnification. In this way, the dark part of the original image becomes relatively darker and more difficult to see, so the actual characteristics are I as shown by the solid line in Fig. 2 (b). The magnification is increased in the small part of I so that the value of I in this part is relatively large.
- the above is the luminance I of the source image information.
- the correction function f ( ⁇ ., ⁇ ) is obtained based on the measured light quantity ⁇ , and the brightness of the actually displayed image is obtained by this, but the image quality of the visible image is measured. May be determined by the relative relationship between the amount of light ⁇ and the brightness of the entire source image information.
- the luminance I of the source image information is used instead of the correction function f ( ⁇ ., ⁇ ).
- the correction calculation as described above is performed using the correction function g ( ⁇ , ⁇ , ⁇ ⁇ ), which is a function of the measured light quantity ⁇ and the average value ⁇ of the brightness of each pixel of the source image information in one image. You should do it.
- the correction function g (I., ⁇ , ⁇ ) corresponds to the visual characteristics. That is, the source image information in one image The average value A of brightness for each pixel
- the luminance data in the image data sent from the image quality adjustment amount calculation unit 2 to the moving image data reproduction unit is converted to I (x, y).
- FIG. 3 is a block diagram showing an image display control unit of a head mount display according to another embodiment of the present invention.
- the same components as those shown in FIG. 1 may be assigned the same reference numerals and explanations thereof may be omitted.
- the block diagram shown in FIG. 3 is different from the block diagram shown in FIG. 1 only in having a moving image data analysis unit 6. Therefore, the video data analysis unit
- the luminance correction of the source image information is not performed for each screen, but the correction value is kept constant within a predetermined number of images, and a new correction value is set for each predetermined number of images. Calculations are made and corrections are made based on these calculations.
- the moving image data analysis unit 6 reads in advance a predetermined number of source image information to be displayed next for each predetermined number of screens from the moving image data holding device 1 (referred to as pre-reading), and the luminance data thereof. Is averaged for each pixel.
- the number of image screens is, for example, the number of screens for several minutes. Let this number of screens be n When the average value of brightness A 'is / (m-n) ⁇ (5)
- the image quality adjustment amount calculation unit 2 uses this A ′ instead of A in the above equation (4) to obtain the luminance for each pixel in the same manner as in the embodiment shown in FIG.
- ⁇ can be quantized, and a table can be provided for each stage of quantized ⁇ , or the function form can be separated.
- a ' can be quantized, and there can be a table for each stage of quantized A', and the function form can be made different. You can use a combination of ⁇ and A 'quantization.
- the average luminance value A ′ is calculated for each block of image data of n screens, and is used for luminance correction of the image data of the n screens.
- the average luminance value A ′ changes abruptly between the image data of one n-screen and the image data of the next n-screen, and as a result, correction is made for each n-screen.
- the values may be different and look unnatural. In order to cope with this, it is effective to obtain the moving average value of the brightness of the image data of n screens and use it instead of obtaining the average value of the brightness of each n screen screen. It is.
- an exponential smoothing value of luminance may be used instead of the moving average.
- the exponential smoothing value A,, (k) of the brightness in the image of the predetermined screen (kth) is
- a k) a'y 0 (x, y) lm-r ⁇ -a) 'A k- ⁇ ) ... (6)
- FIG. 5 is a diagram showing an outline of a mounting portion of the head mount display according to the embodiment of the present invention.
- the head-mounted display 3 1 includes a rear arm 3 2, a display arm 3 3, a display unit 3 4, and an ear pad unit 3 5 as main parts.
- the display unit 3 4 is attached to the tip of the display arm 3 3, and the rear part of the strip-shaped display arm 3 3 is housed in the hollow part of the rear arm 3 2, and is shaped like the wearer's head. It can be expanded and contracted together.
- the ear pad 3 5 is fixed to the rear arm 3 2 and presses the wearer's ear by the elastic biasing force of the rear arm 3 2.
- the display arm 3 3 is housed only on one side of the rear arm 3 2, and when the display 3 4 is placed in front of the left eye, it is shown in FIG. (The solid line indicates the case where the display arm 3 3 and the display unit 3 4 are in the storage position, and the two-dot chain line indicates the image with the display unit 3 4 positioned in front of the wearer's eyes.
- the display unit 34 is placed in front of the right eye, rotate it 180 ° from the posture shown in Fig. 5 and use it in a posture that is upside down, left and right.
- the configuration up to this point is the conventional head mount display shown in Figure 4.
- the configuration is the same.
- the head mount display shown in FIG. 5 is different in that a light quantity sensor 36 is attached to the housing opposite to the side facing the eyes of the display unit 34. It is preferable that the light quantity sensor has the same directivity as one eye.
- FIG. 34 an image forming apparatus composed of a liquid crystal element using a backlight as a light source and an optical system for projecting an image formed on the image forming apparatus to human eyes are incorporated.
- Figure 6 shows an overview of the control circuit for this head-mounted display.
- the output signal of the light quantity sensor 36 is input to C P U 4 1.
- C P U 4 1 stores the source video information of the video to be displayed.
- the source video information includes, for example, the hue, saturation, and relative brightness for each pixel.
- the brightness is a relative brightness because the absolute brightness is determined by this relative brightness information and the brightness of the knock light 43.
- the C P U 41 receives the signal from the light quantity sensor 36, modifies the source video information according to the signal, and sends it to the image processing device 42.
- the image processing device 42 converts this information into a signal for driving the L C D driver 44 and gives a command to the L C D driver 44. Based on this command, the L C D driver 44 actually drives the liquid crystal element 45 and displays an image on the liquid crystal element 45.
- FIG. 1 An example of an image formed on the liquid crystal element 45 is shown in FIG.
- a liquid crystal display portion 52 on which a liquid crystal element is mounted is formed, and the outside thereof is a frame portion (indicated by oblique hatching) on which no liquid crystal element is mounted.
- the background is gray (black in the figure)
- the character information that is the display image and its frame are displayed in lighter gray (white in the figure).
- the outermost periphery of the liquid crystal display 52 is gray that is brighter than the background (white in the figure) and displays the image The boundary with the frame that cannot be made clear.
- the CPU 4 1 controls the brightness of the background and the display image by receiving the signal from the light intensity sensor 3 6 and controlling the brightness of the backlight 4 3 and the relative brightness of each pixel.
- the external environment is bright, that is, when there is a large amount of light incident on the eyes that do not display images, bright external light and images overlap in the brain and the contrast (ratio of brightness between the displayed image and the background) decreases. It looks like. For this reason, when the output p from the light sensor is larger than the threshold value 0 1, the brightness of the character and background is selected so that the displayed image (character), background, and contrast become larger.
- the brightness of the display image (text information) and its frame are set to be approximately the same as the brightness felt by the eyes not displaying the image, and the background brightness is darker than the display image and frame.
- the frame indicating the outermost periphery of the liquid crystal display unit is preferably controlled so as to have the same brightness as the display image.
- the character information that is the display image and its frame appear dazzling.
- the background of the characters will be crushed in black and will not be visible. Therefore, when the output p from the light sensor is smaller than the threshold 0 2 ( ⁇ 2 ⁇ ⁇ 1), the brightness of the text and background is selected so that the contrast is reduced.
- it is preferable to control the brightness of the displayed image so that it is brighter than the background so that the brightness of the background is almost the same as the brightness felt by the eyes not displaying the image.
- the frame indicating the outermost periphery of the liquid crystal display unit so as to have the same brightness as the display image.
- the thresholds ⁇ 1 and 0 2 and the functions f (p) and g (iO) may be changed according to user preferences.
- a display element that does not require backlighting such as organic EL (electroluminescence)
- the brightness of the pixel is controlled using only the display element.
- a frame indicating the outermost periphery of the liquid crystal display is displayed, but this frame is not necessarily displayed.
- this frame is displayed using the liquid crystal display itself, but from the back side of the liquid crystal, the light guide is used to illuminate 13 minutes corresponding to the frame to The outer periphery may be clarified.
- FIG. 8 shows another image of the image formed on the liquid crystal element 45.
- the liquid crystal display 52 has a first background consisting of gray (black in the figure) and a lighter gray (in the figure) formed on the inside.
- a second background consisting of white is provided, and the text information and the frame of the display image are displayed in the second background, ⁇ 2 darker than the background (black in the figure) Display).
- the second background is a rectangular frame, but in FIG. 8 (3 ⁇ 4), the second background is formed in accordance with the shape of the character.
- Such a display method is generally dazzling to the human eye when the area occupied by the second background is large, so the display method shown in Fig. 7 is generally better, but it may be used in some cases. It may be necessary.
- the CPU 4 1 uses the light sensor 3 By controlling the luminance of the backlight 43 and the relative brightness of each pixel in response to the signal from 6, the brightness of the first background, the second background, and the image is controlled.
- the external environment is bright, that is, when there is a large amount of light incident on the eyes that do not display the image, the bright external light overlaps with the image in the brain, and the contrast of the image (the brightness of the character, the second and the background) Ratio, and the ratio of the second background to the first spine; Therefore, if the output from the light intensity sensor is greater than 0 threshold value e3, the brightness of the character and the background is selected so that the contrast between the character and the second background will be better;
- the brightness of the second background is set to be approximately the same as the brightness felt by the eyes not displaying the display image, and the brightness of the image (text information) and the first background Control to darken.
- the character information that is the display image and its frame appear dazzling.
- the background of the characters will be crushed in black and will not be visible. Therefore, when the output P from the light sensor is smaller than the threshold ⁇ 4 ( ⁇ 4 ⁇ ⁇ 3), the brightness ratio between the character and the second background, and the second background so that the contrast is reduced. And the ratio of the first background brightness.
- the brightness of the video (text information) and the first background should be approximately the same as the brightness felt by the eyes not displaying the video, and the brightness of the second background It is preferable to control the brightness.
- the thresholds 0 3, ⁇ 4 and the functions h) and k (p) may be changed according to the user's preference.
- a display element that does not require backlight such as organic EL (electro luminescence)
- the brightness of the pixel is controlled only by the display element.
- the display is gray, but it is of course possible to use color.
- a usage method that uses a single color instead of gray, and a display method that displays images with various colors.
- the power balance of the image to be displayed in consideration of the color balance of the light incident on the eye that does not display the image.
- the entire visual field of the eyes that do not display images usually does not have the same color, but even if a large red object is presented in front of the eyes, for example, people recognize it as red .
- the displayed image appears to overlap the red object, making it difficult to see the red color in the image.
- the color balance of the displayed image is brought closer to green so that the image is easy to see.
- the colors of all visible things that do not display video shift to similar colors. For example, under the incandescent lamp, a person who has a red sight in the entire field of vision hardly feels it. If you look at the video in such a state, it will feel blue overall. Therefore, it is possible to provide an image that looks natural by bringing the color balance of the displayed image closer to red.
- This kind of video color control can be realized as follows. First, the light quantity sensor 36 in FIG. 5 is changed to a color sensor. Then, the output of the color sensor is read by C P U 4 1 and the hue information of the source video information is changed based on the data. Then, the color balance is adjusted by providing the changed hue information to the image processing apparatus 12.
- the color balance can be adjusted, for example, by using R GB three color LEDs for knock light 43 and controlling the amount of light emitted by each LED.
- the force error sensor When controlling the color balance based on the color that the user is actually looking at, the force error sensor should have the same directivity as the visual field of the human eye, and the directivity should be the same as the user's line of sight. Arrange it so that it faces.
- an omnidirectional color sensor is used. Or, place the one with directivity almost equal to the visual field of the human eye so that the directivity faces the same direction as the user's line of sight. May be estimated and used.
Abstract
Description
Claims
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JP2004317546A JP2006126691A (ja) | 2004-11-01 | 2004-11-01 | 映像表示装置 |
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JP2004-321523 | 2004-11-05 | ||
JP2004321523A JP2006133439A (ja) | 2004-11-05 | 2004-11-05 | ヘッドマウントディスプレイ |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2244119A2 (en) | 2009-01-15 | 2010-10-27 | Brother Kogyo Kabushiki Kaisha | Image display device |
CN102542921A (zh) * | 2010-12-22 | 2012-07-04 | 黄志奇 | 一种参数自适应控制的头戴显示器驱动控制结构 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0561794U (ja) * | 1992-01-27 | 1993-08-13 | 横河電機株式会社 | 液晶表示装置 |
JPH11288246A (ja) * | 1998-04-01 | 1999-10-19 | Canon Inc | 画像表示装置及び該装置における表示制御方法 |
JP2000298246A (ja) * | 1999-02-12 | 2000-10-24 | Canon Inc | 表示装置、表示方法および記憶媒体 |
JP2003216094A (ja) * | 2002-01-18 | 2003-07-30 | Pioneer Electronic Corp | プラズマディスプレイパネルの駆動方法及び駆動装置 |
JP2004233908A (ja) * | 2003-01-31 | 2004-08-19 | Nikon Corp | ヘッドマウントディスプレイ |
JP2005014788A (ja) * | 2003-06-26 | 2005-01-20 | Calsonic Kansei Corp | ヘッドアップディスプレイ |
-
2005
- 2005-10-31 WO PCT/JP2005/020335 patent/WO2006049270A1/ja active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0561794U (ja) * | 1992-01-27 | 1993-08-13 | 横河電機株式会社 | 液晶表示装置 |
JPH11288246A (ja) * | 1998-04-01 | 1999-10-19 | Canon Inc | 画像表示装置及び該装置における表示制御方法 |
JP2000298246A (ja) * | 1999-02-12 | 2000-10-24 | Canon Inc | 表示装置、表示方法および記憶媒体 |
JP2003216094A (ja) * | 2002-01-18 | 2003-07-30 | Pioneer Electronic Corp | プラズマディスプレイパネルの駆動方法及び駆動装置 |
JP2004233908A (ja) * | 2003-01-31 | 2004-08-19 | Nikon Corp | ヘッドマウントディスプレイ |
JP2005014788A (ja) * | 2003-06-26 | 2005-01-20 | Calsonic Kansei Corp | ヘッドアップディスプレイ |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2244119A2 (en) | 2009-01-15 | 2010-10-27 | Brother Kogyo Kabushiki Kaisha | Image display device |
EP2244119A3 (en) * | 2009-01-15 | 2011-11-16 | Brother Kogyo Kabushiki Kaisha | Image display device |
US8159417B2 (en) | 2009-01-15 | 2012-04-17 | Brother Kogyo Kabushiki Kaisha | Image display device |
CN102542921A (zh) * | 2010-12-22 | 2012-07-04 | 黄志奇 | 一种参数自适应控制的头戴显示器驱动控制结构 |
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