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WO2013018536A1 - Dispositif d'affichage d'image et procédé d'affichage d'image - Google Patents

Dispositif d'affichage d'image et procédé d'affichage d'image Download PDF

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Publication number
WO2013018536A1
WO2013018536A1 PCT/JP2012/068083 JP2012068083W WO2013018536A1 WO 2013018536 A1 WO2013018536 A1 WO 2013018536A1 JP 2012068083 W JP2012068083 W JP 2012068083W WO 2013018536 A1 WO2013018536 A1 WO 2013018536A1
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WIPO (PCT)
Prior art keywords
light
amount
light source
operation mode
unit
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Ceased
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PCT/JP2012/068083
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English (en)
Japanese (ja)
Inventor
香川　周一
令奈 西谷
菜美 中野
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • 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
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/041—Temperature compensation
    • 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
    • G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen

Definitions

  • the present invention relates to an image display device and an image display method for displaying an image by modulating illumination light from a light source unit with a light modulation unit.
  • a value (light quantity) related to the chromaticity of illumination light directed from a backlight unit as a light source unit to a liquid crystal panel as a light modulation unit is detected by a color sensor, a temperature in the vicinity of the light source unit is detected by a temperature sensor,
  • an image display device that controls light emission of a light source unit according to a value and temperature related to detected chromaticity (see, for example, Patent Document 1).
  • Such an image display device can appropriately adjust the chromaticity of a display image displayed on the liquid crystal panel even if the light emission characteristics of the backlight unit change due to temperature or change over time.
  • the present invention has been made to solve the above-described problems of the prior art, and its purpose is to achieve high image quality even when it has a function of correcting the amount of illumination light according to image data. It is an object to provide an image display device and an image display method capable of maintaining the above.
  • Driving amount And a light source driving unit for executing a process The light source driving unit, when the operation mode is the first operation mode, Executing a process of generating or acquiring the first drive amount; The light source driving amount having a value corresponding to the first driving amount is generated, and the light amount detected by the light amount detecting unit when the light source unit is driven by the light source driving amount is compared with the appropriate light amount.
  • an image display method includes a light source unit that receives a light source drive amount and emits illumination light having a light amount corresponding to the light source drive amount, and the illumination light according to input image data.
  • a light modulation unit that modulates and displays an image
  • a light amount detection unit that detects a light amount of the illumination light and outputs detected light amount data indicating the detected light amount, and a first light amount that stores an appropriate light amount of the illumination light
  • a storage unit a second storage unit that stores a reference drive amount that is a reference value of the light source drive amount; a mode switching process that switches an operation mode to a first operation mode or a second operation mode; In the first operation mode, the light source drive amount correction process based on the image data is not executed, and in the second operation mode, the light source drive amount correction process is executed based on the image data to generate the light source drive amount.
  • Light source A method of device executes and a light source driving unit for executing amount generation process, The light source driving unit, when the operation mode is the first operation mode, Executing a process of generating or acquiring the first drive amount; The light source driving amount having a value corresponding to the first driving amount is generated, and the light amount detected by the light amount detecting unit when the light source unit is driven by the light source driving amount is compared with the appropriate light amount.
  • the image display device or the image display method according to the present invention even when a function for correcting the amount of illumination light according to image data is provided, the change in the light emission characteristics of the light source unit can be appropriately adjusted. There is an effect that high image quality can be maintained.
  • FIG. 1 is a block diagram schematically showing a configuration of an image display device according to Embodiment 1 of the present invention. It is a block diagram which shows roughly an example of a structure of the light source drive part shown by FIG. 4 is a flowchart illustrating an example of an operation performed by a light source driving unit of the image display device according to the first embodiment. It is a block diagram which shows schematically the structure of the image display apparatus which concerns on Embodiment 2 of this invention. It is a block diagram which shows roughly an example of a structure of the light source drive part shown by FIG. 10 is a flowchart illustrating an example of an operation performed by a light source driving unit of the image display device according to the second embodiment.
  • FIG. 1 shows the configuration of an image display apparatus 1 according to Embodiment 1 of the present invention (that is, an apparatus capable of performing the image display method according to Embodiment 1).
  • the image display device 1 includes a display image data generation unit 10, a light modulation unit 11 such as a transmissive liquid crystal panel, a light source unit 12 such as a backlight unit, a light amount detection unit 13, and the like.
  • the first storage unit 16, the second storage unit 17, and the third storage unit 18 may be separate storage devices, or may be different storage areas of the same storage device.
  • FIG. 2 is a block diagram schematically showing an example of the configuration of the light source driving unit 15 shown in FIG. As illustrated in FIG. 2, the light source driving unit 15 includes a first drive processing unit 151, a second drive processing unit 152, and a third drive processing unit 153. However, the configuration of the light source driving unit 15 is not limited to the example of FIG.
  • the display image data generation unit 10 receives image data I 0 input from the outside, and the display image conforming to the standard of the light modulation unit 11 from the image data I 0. to generate the data I 1.
  • the image processing performed by the display image data generating unit 10 is, for example, the gradation conversion processing for converting tone characteristics of the image data I 0, and a color conversion process for converting the hue or saturation of the image data I 0 Etc. are included.
  • the light modulation unit 11 is, for example, a light transmission type liquid crystal panel.
  • Optical modulator 11 receives the display image data I 1 generated from the image data I 0, in accordance with the contents of the display image data I 1, transmission of the illumination light E 0 emitted from the light source unit 12 for each pixel modulating the rate, and displays the image E 1.
  • Light source unit 12 receives a signal indicating a light source driving amount D 3 from the light source driving unit 15, which emits illumination light E 0 of the amount of light corresponding to the light source drive amount D 3.
  • the light source unit 12 includes, for example, a plurality of light emitters as the light emitter 121 that emits light.
  • the light source drive amount D 3 given to the light source unit 12, a plurality of light emitters 121 included in the light source unit 12 can be individually controlled the amount of light emitted from the.
  • the color of the illumination light emitted from the light source unit 12 (the color of the illumination light E 0 changes according to the ratio of the light emitted from the light emitters 121 of each color) and the brightness (the amount of light of the illumination light E 0 ). Or proportional to the intensity).
  • the light emitter 121 for example, red, green, and blue light emitting diodes (LEDs) or laser elements can be used. Further, red, green, and blue light emitters 121 (LEDs or laser elements) can be used in combination with other light emitters that emit light of complementary colors.
  • the light source drive amount D 3 given to the light source unit 12, for example, can employ any of the length of the current amount and the light emission time.
  • the light source drive amount D 3 may also be used both the length of the current amount and the light emission time. Further, as a light source drive amount D 3, may be a fixed value of one of the current amount and the light emission time, it controls the other as a variable value.
  • the light emitter 121 other types of light emitters such as a cold cathode ray tube can be used. Further, different types of light emitters such as LEDs and laser elements can be used in combination as the light emitter 121.
  • the light amount detection unit 13 detects the light amount of the illumination light E 0 from the light source unit 12 and outputs detected light amount data L 0 indicating the detected light amount.
  • the light quantity detection unit 13 can be configured by, for example, a color sensor that detects the light quantity of each color of red, green, and blue.
  • the temperature detection unit 14 detects the temperature of the light source unit 12 or the temperature in the vicinity of the light source unit 12 and outputs detected temperature data T 0 indicating the detected temperature.
  • the light source drive unit 15 generates a light source drive amount D 3 using the reference drive amount D 0 received from the second storage unit 17, and executes a light source drive amount generation process for supplying this to the light source unit 12.
  • FIG. 3 is a flowchart showing an example of the operation of the image display device 1 according to the first embodiment (that is, the image display method according to the first embodiment).
  • the operation start signal C 0 is input to the first drive processing unit 151 of the light source drive unit 15 at a predetermined timing.
  • the predetermined timing is, for example, when the image display device 1 is started (for example, when the image display device is turned on), when the image display operation is ended (for example, when the image display device is stopped), when a channel is switched, or the like. Any one of or two or more.
  • the input timing of the operation start signal C 0 is an input operation of a user instruction using a user interface, a predetermined time interval, may be other timing such as a predetermined date.
  • a microcomputer not shown
  • the image display device 1 generates the operation start signal C 0 and the light source driving unit 15. To supply.
  • the first drive processing unit 151 When the operation start signal C 0 is input, the first drive processing unit 151 enters the first operation mode (the operation mode value is “1”), and this operation mode value is output to the third drive processing unit 153 ( Step S1).
  • the operation mode value is a signal representing the state of the first drive processing unit 151.
  • the operation mode value “1” indicates that the light source driving unit 15 is in the first operation mode
  • the operation mode value “0” indicates that the light source driving unit 15 is in the second operation mode.
  • the first drive processing unit 151 enters the first operation mode first, the reference drive amount D 0 stored in the second storage unit 17 is read, and this reference drive amount D 0 is directly used as the first drive amount D 1. (Step S2).
  • the first drive amount D 1 may be derived by calculation from the reference driving amount D 0.
  • step S1 the operation mode is switched to the second operation mode to (step S13), and the first driving unit 151, with reference to the detected light quantity data L 0 indicating the detected amount of light at a light quantity detecting unit 13, the first and correcting the drive amount D 1, and outputs it as a new first drive amount D 1 (step S11 ⁇ S15). Details of this operation will be described later.
  • the second drive processing unit 152 receives the detected temperature data T 0 indicating the temperature of the light source unit 12 or the vicinity thereof from the temperature detection unit 14 (step S3).
  • the second driving unit 152 by correcting the first drive amount D 1 with reference to the detected temperature data T 0, to generate a second drive amount D 2 (step S4).
  • Generating the second drive amount D 2 is, for example, can be implemented using a look-up table stored in a memory (not shown).
  • the amount of light emitted from a light emitting body (light source) such as an LED or a laser element varies depending on the temperature of the light emitting body even if the driving amount (for example, the supply current value or the light emission time) is the same.
  • a light emitting body such as an LED or a laser element tends to decrease in light emission amount as the temperature increases.
  • the change in the amount of light emission accompanying the temperature change varies depending on the type of light source. For this reason, the value of the drive amount for obtaining the same light emission amount at each temperature is measured in advance and stored in the memory as a lookup table, thereby correcting the change in the light emission amount of the light source unit 12 due to the temperature change. be able to.
  • the light source unit 12 includes light emitters of a plurality of colors and the light emission amount change characteristics with respect to the temperature change are different for each color light emitter, it is necessary to provide a lookup table for each color light emitter. is there.
  • the same amount of light emission can also be generated second drive amount D 2 by the processing using an arithmetic expression that models the change in the driving amount for obtaining a temperature change It is.
  • the third drive processing unit 153 determines whether the operation mode value received from the first drive processing unit 151 is “1” (that is, the first operation mode) or “0” (that is, the second operation mode). (Step S5), and the operation content is switched based on the determination result.
  • Third drive processing section 153 when it is determined that the operation mode value is "1", i.e., when a first operation mode, and outputs a second drive amount D 2 as a light source drive amount D 3 as it is (step S6). That is, when the first operation mode, the light source drive amount D 3 has the same value as the second drive quantity.
  • the third drive processing unit 153 determines that the operation mode value is “0”, that is, in the second operation mode, the third drive processing unit 153 refers to the input image data I 0 to determine the second drive amount D 2 . corrected by (corrected for contrast enhancement), it generates a light source driving amount D 3 (step S7). Details of this operation will be described later.
  • Light source unit 12 emits light of an amount corresponding to the light source drive amount D 3 (step S8).
  • the first drive processing unit 151 determines whether the operation mode value is “1” (that is, the first operation mode) or “0” (that is, the second operation mode) (step S9). ), The operation content is switched based on the determination result.
  • the light amount detection unit 13 uses the brightness of the illumination light E 0 from the light source unit 12 as the light amount of light emitted from the light source unit 12.
  • Detected light amount data L 0 representing the detected light amount is output.
  • the first driving unit 151 receives the detection light quantity data L 0 (step S10), and compared with the reference light quantity L R stored in the first storage unit 16, determines appropriate or not is detected light ( Step S11). Details of this determination processing will be described later.
  • Light source unit 12 when having a plurality of colors of light emitters, the light source unit is detected light amount for each light emitters of each color included in 12, also detected light quantity data L 0 is generated as data for each light emitter of each color .
  • the first drive processing unit 151 sets the value of the first drive amount D 1 at that time as the reference drive amount D 0 and the second storage unit 17.
  • the value of the reference drive amount stored in the second storage unit 17 is updated (step S12), the operation mode value is changed to “0”, and the operation mode is changed from the first operation mode to the first operation mode. It switched to second operation mode with (step S13), and the first drive amount D 1 at that time is output to the second driving unit 152 without correcting (step S14).
  • first driving unit 151 Detected when the light quantity data L 0 is detected light indicated is determined not to be appropriate, first driving unit 151, first corrects the drive amount D 1, a new first drive amount D 1 as the second It outputs to the drive process part 152 (step S15). In this correction operation, also referred to the maximum drive amount D M, which is stored in the third storage unit 18. Details of this operation will be described later.
  • step S9 if the operation mode value "0", the first driving unit 151 outputs without correcting the first drive amount D 1 at that time (step S16). Operation after the first drive amount D 1 is output is similar to the operation described above, the detected temperature data T 0 from the temperature detecting unit 14 is outputted (step S3), and with reference to the detected temperature data T 0 second drive amount D 2 is generated (step S4), and a second drive amount D 2 from the light source drive amount D 3 is generated (step S5 ⁇ S7), the light source unit 12 by the light source drive amount D 3 is driven to emit light (Step S8).
  • the first driving unit 151 will be described in detail the operation determines proper or not the detected light quantity data L 0 (step S11).
  • the first drive processing unit 151 compares the ratio of each color value in the reference light amount (that is, the appropriate light amount L R ) with the ratio of each color value in the detected light amount data L 0 .
  • the light source unit 12 includes red, green, and blue light emitters
  • the light source unit 12 emits red, green, and blue light
  • the reference light amount and the detected light amount data L 0 are red, green
  • the data represents the amount of blue light.
  • the red reference light amount is “40”
  • the green reference light amount is “45”
  • the blue reference light amount is “50”
  • the red detection light amount indicated by the detection light amount data L 0 is “9”
  • the green detection light is detected.
  • the reference light amount and the detected light amount are normalized so that the maximum value is “100”.
  • the normalized reference light amount is “80” for the red reference light amount, “90” for the green reference light amount, and “100” for the blue reference light amount.
  • the normalized detected light intensity is “90” for the red detected light intensity, “80” for the green detected light intensity, and “100” for the blue detected light intensity.
  • the determination threshold value is set in advance in consideration of the white stability required in the image display device.
  • the first driving unit 151 corrects the first drive amount D 1, detailed description will be given of the operation of generating a first drive amount D 1 new (Step S15).
  • the first driving unit 151 within the first drive amount D 1 does not exceed the maximum drive amount D M that is stored in the third storage unit 18, the ratio of detected light intensities of each color indicated by the detected light quantity data L 0 , so as to be close to the ratio of each color of the reference light intensity, to correct the first drive amount D 1.
  • the reference light amount normalized so that the maximum value is “100” is red reference light amount “80”, green reference light amount “90”, and blue reference light amount “ "and the detected light intensity of the red color indicated by the detected light quantity data L 0 is" 100 90 "green detection light quantity is” 80 ", a blue detection light amount” will be described which is 100 ".
  • the red, larger than the detection light amount reference amount of light, the green, the detection light quantity is small compared to the reference amount of light, corresponding to the red light emitter of the first drive amount D 1
  • the driving amount is smaller than the current amount (for example, by a predetermined amount), and the driving amount corresponding to the green light emitter is larger than the current amount (for example, by a predetermined amount). 1 corrects the drive amount D 1.
  • the maximum drive amount DM is exceeded by correcting the green drive amount, the drive amounts corresponding to the red and blue light emitters are reduced.
  • Providing the maximum drive amount D M has the effect of preventing the life of the light source unit 12 is shortened by giving an excessive driving amount.
  • Third driving unit 153 operates to generate a light source driving amount D 3 at about (Step S5 ⁇ S16) will be described in detail. If the operation mode value "1" from the first driving unit 151, the third driving unit 153 outputs the second driving amount D 2 as a light source drive amount D 3 as it is (step S6). On the other hand, when the operation mode value is “0”, the third drive processing unit 153 generates the light source drive amount D 3 by correcting the second drive amount D 2 with reference to the input image data I 0. (Step S7). Specifically, it operates as follows.
  • the third drive processing unit 153 detects the average luminance of each frame of the input image data I 0 and accumulates the detected average luminance of each frame for several frames.
  • the third drive processing unit 153 is a multiplication coefficient that has a small value when the accumulated average luminance is low, and a large value when the accumulated average luminance is high. For example, the third drive processing unit 153 has a value from 0 to 1.
  • a multiplication coefficient within the range of is generated.
  • Third drive processing section 153 the generated multiplication factor, by multiplying the second drive amount D 2, generates a light source driving amount D 3.
  • the average luminance of each frame is accumulated and used for several frames.
  • the image quality may be deteriorated when the brightness of the light source section changes abruptly. This is to prevent such image quality deterioration.
  • the first driving unit 151 when the first operation mode, repeatedly determining the detected light quantity data L 0 proper (step S11) is until the first correction driving amount D 1 (step S15), and detects after the light quantity data L 0 is properly judged (step S11), the first driving unit 151, the second operation mode becomes (step S13), and outputs without correcting the first drive amount D 1 (step S14).
  • Third driving unit 153 between the first driving unit 151 is the first operation mode, and outputs a second drive amount D 2 as a light source drive amount D 3 as it is (Step S15).
  • the light quantity detection unit 13 can detect a change in the light quantity of each color due to a long-term characteristic change such as a secular change in the light emission characteristic of the light source part 12 without being affected by the contents of the input image data I 0. It becomes.
  • the third drive processing unit 153 corrects the second drive amount D 2 in accordance with the input image data I 0 after the first drive processing unit 151 enters the second operation mode (step S14) (step S14).
  • ⁇ 1-3 Effects of First Embodiment
  • a high-quality image with high contrast in the second operation mode which is a normal image display mode.
  • a display can be provided, and in the first operation mode, a change in light emission intensity with respect to the driving amount of the light source unit 12 caused by a long-term change in characteristics such as a change in characteristics over time can be detected with high accuracy. There is an effect that can be corrected.
  • ⁇ 1-4 Modification of Embodiment 1
  • red, green, and blue LEDs or a laser light source can be used.
  • a red, green or blue LED or laser light source and a light source that emits light of a complementary color can be used in combination.
  • a combination of a red laser light source and a cyan LED that is a complementary color thereof can be used.
  • the operation after the operation start signal C 0 is input has been described.
  • the first drive processing unit 151 is in the second operation mode.
  • the reference drive amount D 0 stored in the second storage unit 17 is output as the first drive amount D 1 .
  • the first driving unit 151 is a display image data I 1 when the first operation mode, if the data representing the black, successively illuminates each color of the light-emitting body having the light source unit 12 for each color, it sync Thus, the amount of light can be detected.
  • the light amount detection unit 13 can be configured by a monochrome optical sensor instead of a color sensor, and the cost can be reduced.
  • FIG. 4 shows the configuration of an image display apparatus 2 according to Embodiment 2 of the present invention (that is, an apparatus capable of performing the image display method according to Embodiment 2).
  • FIG. FIG. 5 is a block diagram schematically showing an example of the configuration of the light source driving unit 25 shown in FIG.
  • FIG. 6 is a flowchart illustrating an example of an operation (that is, an image display method according to the second embodiment) by the light source driving unit 25 of the image display apparatus 2 according to the second embodiment. 4, components that are the same as or correspond to those shown in FIG. 1 (Embodiment 1) are assigned the same reference numerals.
  • FIG. 1 Embodiment 1
  • the image display device 2 includes a display image data generation unit 10, a light modulation unit 11, a light source unit 22, a light amount detection unit 13, a temperature detection unit 14, and a light source drive unit. 25, a first storage unit 16, a second storage unit 17, and a third storage unit 18.
  • the light source drive unit 25 includes a first drive processing unit 151, a second drive processing unit 152, and a third drive processing unit 253.
  • the image display device 2 according to the second embodiment is basically the same as the image display device 1 according to the first embodiment. .
  • the amount of illumination light for each of a plurality of image display regions in the light modulation unit 11 (for example, a liquid crystal panel) (that is, light emission corresponding to each of the plurality of image display regions of the light modulation unit 11).
  • the amount of light emitted from the body is individually controlled.
  • the third drive processing unit 253 is configured to be able to give a different light source drive amount D 3 for each of the plurality of image display regions of the light modulation unit 11.
  • the light modulation unit 11 is divided into a plurality of image display areas
  • the light source unit 22 includes a plurality of light emitters respectively corresponding to the plurality of image display areas
  • the light source driving unit 25 performs the second operation.
  • the light source drive amount correction process in the mode step S7, the light source drive amount corresponding to each of the plurality of light emitters is supplied based on the image data of each of the plurality of image display areas.
  • ⁇ 2-2 Operation of Embodiment 2
  • the third drive processing unit 253 refers to the input image data I 0 and corrects the second drive amount D 2 for each illumination area. it allows to produce a light source drive amount D 3. Specifically, the third drive processing unit 253 detects the average luminance of each frame of the input image data I 0 for each of a plurality of image display areas set in the screen. The image display area in this screen is determined so as to coincide with the illumination area of the corresponding light source unit. The third drive processing unit 253 accumulates the detected average luminance for each image display area for several frames.
  • the third drive processing unit 253 applies a multiplication coefficient in a range from 0 to 1 which is a small value when the accumulated average luminance is low and a large value when the accumulated average luminance is high. Generate. Third drive processing section 253, the generated multiplication factor, by multiplying the second drive amount D 2, generates a light source driving amount D 3. By operating in this way, the illumination light in the region where the average luminance of the input image data I 0 is high becomes brighter, and the illumination light in the region where the average luminance of the input image data I 0 is low becomes darker. As a result, the contrast between bright and dark areas in the image is improved, and the illumination light becomes darker in areas with low average luminance, thereby reducing power consumption.
  • the third driving unit 253 when the first driving unit 151 is in the first operation mode, the third driving unit 253 outputs the second driving amount D 2 as a light source drive amount D 3 as it is Therefore, the light quantity detection unit 13 can detect a change in the light quantity of each color due to a long-term characteristic change such as a secular change in the light emission characteristic of the light source part 22 without being affected by the contents of the input image data I 0. Become.
  • the intensity of illumination light in each region influences each other, so that it is very difficult to detect a change in the characteristics of the light source unit 22.
  • the light quantity change of each color due to a long-term characteristic change such as a secular change of the light emission characteristic of the light source unit 22 is not affected by the contents of the input image data I 0. It is possible to provide a high-quality display image that can be detected and corrected with high accuracy and has high contrast.
  • the operation of the image display device 2 according to the second embodiment is basically the same as the operation of the image display device 1 according to the first embodiment.
  • ⁇ 2-3 Effects of Second Embodiment
  • a high-quality image with high contrast in the second operation mode which is a normal image display mode.
  • a display can be provided, and in the first operation mode, a change in light emission intensity with respect to the driving amount of the light source unit 22 due to a long-term change in characteristics such as a change in characteristics over time can be detected with high accuracy. There is an effect that can be corrected.
  • FIG. 7 shows the configuration of an image display apparatus 3 according to Embodiment 3 of the present invention (that is, an apparatus capable of performing the image display method according to Embodiment 3).
  • FIG. FIG. 8 is a block diagram schematically showing an example of the configuration of the light source driving unit 35 shown in FIG.
  • FIG. 9 is a flowchart illustrating an example of an operation (that is, an image display method according to the third embodiment) by the light source driving unit 35 of the image display device 3 according to the third embodiment.
  • the same or corresponding components as those shown in FIG. 1 (Embodiment 1) are denoted by the same reference numerals.
  • FIG. 7 shows the configuration of an image display apparatus 3 according to Embodiment 3 of the present invention (that is, an apparatus capable of performing the image display method according to Embodiment 3).
  • FIG. 8 is a block diagram schematically showing an example of the configuration of the light source driving unit 35 shown in FIG.
  • FIG. 9 is a flowchart illustrating an example of an operation (
  • the image display device 3 according to Embodiment 3 does not include the temperature detection unit 14 (FIG. 1) in Embodiment 1 as shown in FIG. 7, and the light source as shown in FIG.
  • the driving unit 35 is different from the image display device 1 according to the first embodiment in that the driving unit 35 does not include the second driving processing unit 152 (FIG. 2) in the first embodiment.
  • the operation (image display method) of the image display device 3 according to the third embodiment is the same as the first embodiment in that steps S3 and S4 (FIG. 3) in the first embodiment are not provided, as shown in FIG. 1 is different from the operation (image display method) of the image display apparatus 1 according to FIG.
  • the image display device 3 according to the third embodiment is basically the same as the image display device 1 according to the first embodiment.
  • Light source driving unit 35 when the operation mode is the first operation mode, the first drive amount D 1 generated or obtained to process (steps S2 or S14, S15) executes, corresponding to the first drive amount D 1 generating a light source drive amount D 3 whose value.
  • the light source driving unit 35 as a result of the amount of light quantity detection unit 13 has detected when driving the light source unit 12 by the light source drive amount D 3, and compared with appropriate light quantity L R is, whether a predetermined condition is satisfied A determination process (steps S8 to S11) for determination is executed.
  • the change process (step S12) and the second operation mode setting process (step S13) for switching the operation mode to the second operation mode are executed and it is determined that the predetermined condition is not satisfied in the determination process, the detected light amount data L 0 depending on, it executes drive amount changing processing of changing the first value of the drive amount D 1 a (step S15).
  • the operation (image display method) of the image display apparatus 3 according to the third embodiment is basically the same as the first embodiment except that steps S3 and S4 (FIG. 3) in the first embodiment are not provided.
  • 1 is the same as the operation (image display method) of the image display apparatus 1 according to FIG.
  • ⁇ 3-3 Effects of Embodiment 3
  • a high-quality image with high contrast is obtained in the second operation mode, which is a normal image display mode.
  • a display can be provided, and in the first operation mode, a change in light emission intensity with respect to the driving amount of the light source unit 12 caused by a long-term change in characteristics such as a change in characteristics over time can be detected with high accuracy. There is an effect that can be corrected.
  • the image display device 3 has a function capable of maintaining the temperature of the light source unit 12 substantially constant when a light emitter having low temperature dependency is used as the light source of the light source unit 12. It is effective in the case of having, and the configuration can be simplified.
  • 1, 2, 3 image display device 10 display image data generation unit, 11 light modulation unit, 12, 22 light source unit, 13 light quantity detection unit, 14 temperature detection unit, 15, 25, 35 light source drive unit, 16 first Storage unit, 17 second storage unit, 18 third storage unit, 121, 221 light emitter, 151 first drive processing unit, 152 second drive processing unit, 153, 253, 353 third drive processing unit.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

L'invention porte sur un dispositif d'affichage d'image et un procédé d'affichage d'image dans lesquels un niveau de lumière d'éclairage est corrigé en correspondance avec des données d'image. Selon le dispositif et le procédé, une unité d'attaque de source de lumière génère ou acquière un premier niveau d'attaque (D1) dans un premier mode de fonctionnement (étapes (S2, S14, S15)), il est déterminé si des résultats obtenus par comparaison d'un niveau de lumière détecté à un niveau de lumière correct (LR) satisfont ou non des conditions prédéterminées, ledit niveau de lumière détecté étant obtenu lorsqu'une unité source de lumière est attaquée par un niveau d'attaque de source de lumière (D3) généré sur la base du premier niveau d'attaque (étapes (S8-S11)), quand les conditions prédéterminées sont satisfaites, une valeur d'un niveau d'attaque de référence stocké (D0) est changée pour la valeur du premier niveau d'attaque (étape (S12)), et le mode est basculé vers un second mode (étape (S13)), et quand les conditions prédéterminées ne sont pas satisfaites, la valeur du premier niveau d'attaque est changée en correspondance avec les données de niveau de lumière détecté (L0) (étape (S5)).
PCT/JP2012/068083 2011-07-29 2012-07-17 Dispositif d'affichage d'image et procédé d'affichage d'image Ceased WO2013018536A1 (fr)

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JP2011-166219 2011-07-29

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JP2016075826A (ja) * 2014-10-07 2016-05-12 株式会社リコー 画像投射装置、画像投射方法およびプログラム

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WO2018147067A1 (fr) * 2017-02-10 2018-08-16 シャープ株式会社 Dispositif de source de lumière laser

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JPH08313879A (ja) * 1995-05-16 1996-11-29 Sony Corp 液晶表示装置およびその調整方法
JP2006030416A (ja) * 2004-07-14 2006-02-02 Mitsubishi Electric Corp 画像表示装置および画像表示方法
JP2006318733A (ja) * 2005-05-12 2006-11-24 Rohm Co Ltd 照明装置及びこれを用いた表示装置
JP2007279197A (ja) * 2006-04-04 2007-10-25 Epson Imaging Devices Corp 液晶装置及び電子機器
JP2008096696A (ja) * 2006-10-12 2008-04-24 Sony Corp バックライト制御装置、バックライト制御方法、および液晶表示装置
JP2008145964A (ja) * 2006-12-13 2008-06-26 Lg Phillips Lcd Co Ltd 液晶表示装置

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JPH08313879A (ja) * 1995-05-16 1996-11-29 Sony Corp 液晶表示装置およびその調整方法
JP2006030416A (ja) * 2004-07-14 2006-02-02 Mitsubishi Electric Corp 画像表示装置および画像表示方法
JP2006318733A (ja) * 2005-05-12 2006-11-24 Rohm Co Ltd 照明装置及びこれを用いた表示装置
JP2007279197A (ja) * 2006-04-04 2007-10-25 Epson Imaging Devices Corp 液晶装置及び電子機器
JP2008096696A (ja) * 2006-10-12 2008-04-24 Sony Corp バックライト制御装置、バックライト制御方法、および液晶表示装置
JP2008145964A (ja) * 2006-12-13 2008-06-26 Lg Phillips Lcd Co Ltd 液晶表示装置

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Publication number Priority date Publication date Assignee Title
JP2016075826A (ja) * 2014-10-07 2016-05-12 株式会社リコー 画像投射装置、画像投射方法およびプログラム

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