WO2021166780A1 - 表示画面からの出射光の検知方法、および表示装置 - Google Patents

表示画面からの出射光の検知方法、および表示装置 Download PDF

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Publication number
WO2021166780A1
WO2021166780A1 PCT/JP2021/005106 JP2021005106W WO2021166780A1 WO 2021166780 A1 WO2021166780 A1 WO 2021166780A1 JP 2021005106 W JP2021005106 W JP 2021005106W WO 2021166780 A1 WO2021166780 A1 WO 2021166780A1
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WIPO (PCT)
Prior art keywords
light
optical sensor
display screen
display device
emitted
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2021/005106
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English (en)
French (fr)
Japanese (ja)
Inventor
昭憲 林
裕介 伴場
亮輔 堂前
伊藤　広
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Eizo Corp
Original Assignee
Eizo Corp
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Filing date
Publication date
Application filed by Eizo Corp filed Critical Eizo Corp
Priority to JP2022501843A priority Critical patent/JP7152628B2/ja
Priority to US17/800,673 priority patent/US20230138625A1/en
Priority to CN202180011414.2A priority patent/CN115023750B/zh
Publication of WO2021166780A1 publication Critical patent/WO2021166780A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/02—Details
    • G01J1/0238—Details making use of sensor-related data, e.g. for identification of sensor or optical parts
    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/30—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 using controlled light sources using electroluminescent panels
    • G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/58—Photometry, e.g. photographic exposure meter using luminescence generated by light
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • 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
    • G09G3/2092—Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • 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
    • G09G3/36—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 using liquid crystals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/02—Details
    • G01J1/04—Optical or mechanical part supplementary adjustable parts
    • G01J1/0407—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
    • G01J3/506—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors measuring the colour produced by screens, monitors, displays or CRTs
    • 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
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • 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
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0242—Compensation of deficiencies in the appearance of colours
    • 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
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0285—Improving the quality of display appearance using tables for spatial correction of display data
    • 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
    • G09G2320/0693—Calibration of display 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
    • 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 detecting emitted light from a display screen.
  • Patent Document 1 discloses that in a display device controlled so that a light source of a backlight blinks, the emitted light from each pixel is measured while moving a line sensor in accordance with the timing of pixel lighting. Has been done.
  • the present invention has been made in view of such circumstances, and an object of the present invention is to provide a method for detecting emitted light from a display screen with a simple configuration and procedure without changing the position of a sensor. Is.
  • a method of detecting light emitted from a display screen of a display device which comprises an arrangement step of arranging a photodetector including an optical sensor and a light guide member on the surface side of the display screen, and the light.
  • a method including a detection step of turning on an arbitrary area of the display screen without changing the position of the sensor, guiding the light emitted from the area to the optical sensor by the light guide member, and detecting the light by the optical sensor.
  • the light emitted from an arbitrary area of the display screen is guided by the light sensor and detected by the light guide member arranged on the surface side of the display screen. This makes it possible to detect the emitted light from the display screen with a simple configuration and procedure without using a mobile sensor and without changing the position of the sensor.
  • a brightness specifying step for specifying the brightness corresponding to the emitted light detected in the detection step is further included.
  • the chromaticity specifying step for specifying the chromaticity corresponding to the emitted light detected in the detection step is further included.
  • a diffuse reflection structure is formed on at least one of the front surface and the back surface of the light guide member.
  • a reflective structure is formed on the surface of the light guide member.
  • the metering unit is removable with respect to the display device.
  • the display device arranged on the display screen further includes a step of emitting light.
  • a display device that detects the light emitted from the display screen, includes a control unit, and a light measuring unit including a light guide member and an optical sensor is arranged on the surface side of the display screen.
  • the control unit lights an arbitrary area of the display screen without changing the position of the optical sensor, and the light emitted from the area is guided to the optical sensor by the light guide member, and the optical sensor.
  • a display device that is configured to be detectable is provided.
  • FIG. 1A is a front perspective view of the display device 10 according to the first embodiment.
  • FIG. 1B is a front view of the display unit 1. It is sectional drawing of the display part 1.
  • FIG. It is a figure which shows the functional structure of the display device 10. It is a flow chart which shows the procedure of the luminance unevenness correction processing.
  • FIG. 5A is a diagram illustrating lighting of the display screen 4.
  • FIG. 5B is a diagram illustrating detection of emitted light from the display screen 4. It is a figure explaining the update process of unevenness correction data.
  • FIG. FIG. 8A is a cross-sectional view of the display unit 1 in the modified example 2 when an electric field is applied to the light guide plate 7b.
  • FIG. 8B is a cross-sectional view of the display unit 1 in the modified example 2 when no electric field is applied to the light guide plate 7b.
  • FIG. 9A is a cross-sectional view showing a modified example 3 when the light guide plate 7b is provided on a part of the display screen 4.
  • FIG. 9B is a cross-sectional view of the modified example 3 in the case where the air layer 7c is provided between the protective glass 7 and the display device 6.
  • FIG. 10A is a cross-sectional view of the display unit 1 in the modified example 4 using the flat mirror 7d.
  • FIG. 10B is a cross-sectional view of the display unit 1 in the modified example 4 using the curved mirror 7d. It is a front view of the display part 1 in the modification 5.
  • FIG. 14A is a cross-sectional view of the display unit 1 according to the third embodiment
  • FIG. 14B is a front view of the display unit 1 according to the third embodiment.
  • FIG. 16A is a cross-sectional view of the display unit 1 according to the modified example 1 of the third embodiment
  • FIG. 16B is a front view of the display unit 1 according to the modified example 1 of the third embodiment.
  • FIG. 18A is a cross-sectional view of the display unit 1 according to the modified example 3 of the third embodiment
  • FIG. 18B is a front view of the display unit 1 according to the modified example 3 of the third embodiment
  • FIG. 19A is a cross-sectional view of the display unit 1 according to the modified example 4 of the third embodiment
  • FIG. 19B is a front view of the display unit 1 according to the modified example 4 of the third embodiment. It is a figure explaining the detection of the light emitted from the display screen 4 in the modification 4.
  • First Embodiment> (1.1. Configuration of display device 10) The configuration of the display device 10 will be described with reference to FIGS. 1 and 2.
  • the display device 10 is composed of a display unit 1, a bezel 2, and a leg unit 3.
  • the display unit 1 displays an image (including a still image and a moving image) on the display screen 4.
  • the bezel 2 is attached from the back surface to the side surface of the display unit 1, and is formed of an insulator such as engineering plastic.
  • the bezel 2 is provided with a power indicator, various keypads used for user operation, a speaker, and the like.
  • the legs 3 are attached to the back surface of the bezel 2 and support the display 1.
  • the optical sensor 5 is arranged inside the bezel 2 in front of the display unit 1.
  • the optical sensors 5 are arranged inside the upper, lower, left, and right bezels 2 so as to surround the outer periphery of the display screen 4.
  • the display screen 4 includes a display device 6 arranged on the back side of the display unit 1 and a protective glass 7.
  • the display device 6 is composed of, for example, an organic EL display panel, and displays an image by emitting light from a light emitting element corresponding to the pixels of the display screen 4.
  • the protective glass 7 is arranged on the surface side of the display screen 4 in order to protect the display device 6. Although the details will be described later, the protective glass 7 functions as a light guide member that transmits the emitted light from the display device 6 and reflects the emitted light to guide the light sensor 5. In the example shown in FIG.
  • the optical sensor 5 is arranged on the side of the protective glass 7, but the present invention is not limited to this example, and the optical sensor 5 may be arranged on the side of the display device 6, for example. .. Further, in order to guide all the emitted light from the display device 6 to the optical sensor 5 without leaking to the outside, the surface of the protective glass 7 on which the optical sensor 5 is arranged or the side surface of the display device 6 is formed on the optical sensor 5. All may be mirrored except for the placement position.
  • the display device 10 includes a control unit 8 and a storage unit 15 in addition to the above-mentioned optical sensor 5 and display device 6.
  • the control unit 8 includes a display control unit 11, a sensor control unit 12, a brightness identification unit 13, and an unevenness correction processing unit 14.
  • the display control unit 11 controls the light emitted from the display device 6.
  • the sensor control unit 12 specifies the intensity of the emitted light detected by the optical sensor 5.
  • the brightness specifying unit 13 specifies the brightness of the emitted light detected by the optical sensor 5.
  • the unevenness correction processing unit 14 corrects the brightness unevenness of the display screen 4. Details of each function will be described later.
  • Each of the above-mentioned components may be realized by software or hardware.
  • various functions can be realized by executing a program by a CPU (Central Processing Unit).
  • the program may be stored in a storage unit 15 realized by a memory, an HDD (Hard Disk Drive), an SSD (Solid State Drive), or the like, or may be stored in a non-temporary recording medium that can be read by a computer. ..
  • each of the above-mentioned components may be realized by so-called cloud computing by reading a program stored in an external storage unit.
  • various circuits such as ASIC (Application Specific Integrated Circuit), FPGA (Field Programmable Gate Array), or DRP (Dynamic Reconfigurable Processor) can be realized.
  • step S110 the display control unit 11 lights a part of the area of the display screen 4 to emit the emitted light.
  • the display control unit 11 causes a part of the display device 6 to emit light in order from R1 which is the upper left region of the display screen 4 to Rn which is the lower right region. Turn it on.
  • the shape, size, and number of the areas to be sequentially lit can be appropriately set, but it is preferable that the area is set so as to cover the display screen 4. Further, the regions may be set exclusively for each other or may be set so as to overlap each other.
  • step S120 the emitted light from the emitted region is detected by the optical sensor 5.
  • the optical sensor 5 As shown in FIG. 5B, the light emitted from a part of the display screen 4 is reflected in the protective glass 7 that functions as a light guide member, and is detected by the optical sensor 5.
  • step S130 the sensor control unit 12 determines whether or not the emitted light from the entire area of the display screen has been detected. When the emitted light from all the regions is detected (Yes in step S130), step S140 is performed. If the emitted light from all the regions is not detected (No in step S130), steps S110 and S120 are repeated.
  • the brightness specifying unit 13 specifies the brightness for each lit area based on the detection result of the optical sensor 5 (that is, the intensity of the detected emitted light).
  • the sensor calibration coefficient matrix C is stored in the storage unit 15.
  • the sensor calibration coefficient matrix C has a correspondence relationship between the brightness value for each region of the display screen 4 measured by a luminance meter or the like at the time of manufacturing the display device 10 and the detection value of the optical sensor 5 at the time of light emission in the region.
  • the brightness specifying unit 13 specifies the brightness of each lit area of the display screen 4 based on the detection result data R of the optical sensor 5 and the sensor calibration coefficient matrix C.
  • step S150 the unevenness correction processing unit 14 updates the unevenness correction data M.
  • the storage unit 15 includes unevenness correction data M and unevenness correction target matrix T.
  • the unevenness correction data M is data relating to the correction amount of the luminance unevenness for each area of the display screen 4 measured at the time of manufacturing the display device 10, and is the data referred to when performing the luminance unevenness correction for arbitrary image data.
  • the unevenness correction target matrix T is data that defines the amount of luminance unevenness (rate of change in luminance with respect to the reference value) that should be targeted for each region of the display screen 4.
  • the updated unevenness correction data Mref can be expressed by the following equation (1). Subsequent luminance unevenness correction is performed using the unevenness correction data Mref updated in this way.
  • the display device 10 includes a protective glass 7 as a light guide member, an optical sensor 5, and a control unit 8.
  • the protective glass 7 is installed on the front surface side of the display screen 4, and the optical sensor 5 is installed on the outer peripheral side of the display screen 4.
  • the control unit 8 lights a part of the display screen 4. The light emitted from the region is guided to the optical sensor 5 by the protective glass 7 as a light guide member, and is detected by the optical sensor 5.
  • the luminance unevenness correction data of the display screen 4 can be updated, and an appropriate luminance unevenness correction process can be performed.
  • a modified example 1 of the first embodiment will be described with reference to FIG. 7.
  • a pattern 7a for reflecting the light emitted from the display device 6 is formed on the surface of the protective glass 7 in the first modification.
  • the pattern 7a may be formed by dot printing on the surface of the protective glass 7, or may be realized by attaching the lens structure to the surface of the protective glass 7. With such a configuration, it is possible to specifically realize a light guide member that guides the light emitted from the display device 6 to the optical sensor 5.
  • Modification 2 will be described with reference to FIGS. 8A and 8B.
  • a light guide plate 7b that switches between transmission and reflection of emitted light when an electric field is applied is attached to the surface of the protective glass 7 in the second modification.
  • the light guide plate 7b is realized by, for example, PDLC (Polymer Dispersed Liquid Crystal) glass.
  • an electric field is applied to the light guide plate 7b during normal use to make the display screen 4 visible, and at the time of specific work such as detecting the emitted light from the display device, the light guide plate 7b is used.
  • the application of the electric field to the display device 6 can be stopped, and the light emitted from the display device 6 can be guided to the optical sensor 5, and the control can be performed according to the intended use.
  • FIGS. 9A and 9B Modification 3 will be described with reference to FIGS. 9A and 9B.
  • the region that reflects the emitted light can be changed by applying an electric field only to a part of the light guide plate 7b. With such a configuration, it is possible to change the region that reflects the emitted light according to the lighting region.
  • an air layer 7c is provided between the protective glass 7 and the display device 6. By providing the air layers 7c having different refractive indexes in this way, it becomes easy to propagate the emitted light reflected by the light guide plate 7b in the protective glass 7.
  • Modification 4 will be described with reference to FIGS. 10A and 10B.
  • a mirror 7d for reflecting the light emitted from the display device 6 is installed on the surface of the protective glass 7 in the modified example 4 as a light guide member.
  • the mirror 7d is configured to be removable, and the display screen can be visually recognized by removing it during normal use.
  • FIG. 10A illustrates a mode in which a flat mirror 7d is installed.
  • FIG. 10B illustrates an embodiment in which a curved mirror 7d is installed.
  • Second Embodiment> (2.1. Configuration) A second embodiment of the present invention will be described with reference to FIGS. 12 and 13.
  • the second embodiment is different from the first embodiment in that it includes a chromaticity specifying step for specifying the chromaticity corresponding to the emitted light detected by the optical sensor 5.
  • a chromaticity specifying step for specifying the chromaticity corresponding to the emitted light detected by the optical sensor 5.
  • control unit 8 is used for each region of the R (Red), G (Green), and B (Blue) colors in the light emitting element of the display device 6. Light is emitted and the light intensity of each color is detected by the light sensor 5 (steps S110 to S240 in FIG. 13).
  • step S250 the control unit 8 compares the light intensity of R, G, B measured in advance with the newly acquired detection result of R, G, B, and R, for each detected region, Specify the chromaticity of G and B.
  • step S260 the control unit 8 updates the color unevenness correction data so that the ratios of R, G, and B are the same. As a result, the display color can be adjusted to the target color.
  • three types of optical sensors 5 may be arranged corresponding to the respective colors of R, G, and B.
  • the sensor for each color of R, G, and B can be obtained.
  • the chromaticity is accurately measured even when the chromaticity of each R, G, B changes due to aging. It becomes possible.
  • the photometric unit 20 includes a light propagation unit 21 as a light guide member and an optical sensor 22.
  • the light measuring unit 20 is formed in a flat rectangular parallelepiped shape, and as shown in FIG. 14B, preferably has a larger area than the display screen 4 when viewed from the front, and more preferably has a wider area than the display device 10. To be equipped.
  • the light propagation unit 21 is made of glass or the like, and the front surface 21a of the light propagation unit 21 is mirrored. As a result, the light propagation unit 21 transmits the emitted light from the display device 6 and functions as a light guide member that reflects the emitted light and guides the emitted light to the optical sensor 5. As an example, a plurality of optical sensors 5 (three in the example shown in FIG. 14) are provided at predetermined positions on the upper surface of the photometric unit 20.
  • the light propagation unit 21 may further have a structure for controlling the reflection direction of the emitted light. Further, a configuration for diffusing the emitted light may be provided on the surface of the display device 6.
  • the photometric unit 20 independent of the display device 10 is used, and the light emitted from an arbitrary region of the display screen 4 is guided to the optical sensor 22 by the light propagation unit 21 and detected. ..
  • the light measuring unit 20 is configured to be removable from the display device 10, it is possible to apply the technical idea of the present application to the existing display devices of various sizes.
  • the optical sensor 22 is provided without changing the predetermined position of the photometric unit 20, which eliminates the need for a mechanism for moving the optical sensor 22 and a process for controlling the movement of the optical sensor 22.
  • the front surface 21a of the light propagation unit 21 is surface-treated by a diffuse reflection structure.
  • a diffuse reflection structure By performing such a surface treatment, it is possible to promote the diffusion of the emitted light in the light propagation unit 21, and it becomes easy to guide the emitted light to the optical sensor 22.
  • the diffuse reflection structure dot printing and (/ or) surface treatment for imparting a lens array shape can be performed. In these cases, the dot printing pattern, the shape, size, and density of the lens array may be appropriately designed in consideration of the shape of the light propagation portion 21, the position with the light sensor 22, and the like.
  • the back surface 21b of the light propagation unit 21 is surface-treated by a diffuse reflection structure. Specifically, a diffusion sheet may be attached, or dot printing or a lens array shape may be added. By performing such a surface treatment, the diffusion of the emitted light in the light propagation unit 21 can be further promoted, and the design for guiding the emitted light to the optical sensor 22 becomes easy.
  • the optical sensor 22 is arranged on the front surface of the photometric unit 20.
  • one optical sensor 22 may be arranged at the center of the front surface of the photometric unit 20, or may be arranged at another location on the front surface of the photometric unit 20.
  • the front surface 21a and the back surface 21b of the light propagation portion 21 are surface-treated by a diffuse reflection structure.
  • the light measuring unit 20 in the modified example 4 has an uneven Fresnel mirror 24 formed on the front surface thereof.
  • the Fresnel mirror 24 is formed on an arc centered on the optical sensor 22 when viewed from the front.
  • the light emitted from an arbitrary region of the display device 6 passes through the light propagation portion 21 and is reflected by the Fresnel mirror 24, and is guided to the optical sensor 22 through the locus Lr. Be taken.
  • the Fresnel mirror 24 is formed, the emitted light is reflected on the virtual parabolic surface P and can be guided to the optical sensor 22 in the same manner as passing through the virtual locus Lf. With such a configuration, it becomes easy to arrange one optical sensor 22 in the center of the upper surface of the photometric unit 20 and design the optical sensor 22 to guide the light emitted from the display device 6.
  • the application of the present invention is not limited to the above embodiment.
  • the number, shape, and placement position of the optical sensors 5 are not limited to the above aspects.
  • the number of optical sensors 5 may be one, or may be arranged on the bezel instead of inside the bezel.
  • the display screen 4 is realized by the light emitting element of the display device 6 emitting light, but the present invention is not limited to this mode.
  • the technical idea of the present disclosure can be applied to a so-called liquid crystal panel in which the light from the backlight is blocked by the liquid crystal unit.
  • the removable mirror 7d is used as the light guide member, but the light guide member in other embodiments may also have a removable configuration.
  • the photometric unit 20 may be provided with a control unit and may execute some or all of the functions of the control unit 8 such as the sensor control unit 12 or the brightness identification unit 13. Further, the light measuring unit 20 may be arranged so as not to be removable, that is, a fixed arrangement.
  • the present invention can also be realized as a program that causes the control unit 8 to exert each of the above-mentioned functions.
  • the present invention can also be realized as a computer-readable non-temporary recording medium that stores the above-mentioned program.
  • Display part 2 Bezel 3: Leg part 4: Display screen 5: Optical sensor, 6: Display device, 7: Protective glass, 7a: Pattern, 7b: Light guide plate, 7c: Air layer, 7d: Mirror, 8: Control unit, 10: Display device, 11: Display control unit, 12: Sensor control unit, 13: Brightness identification unit, 14: Unevenness correction processing unit, 15: Storage unit, 20: Photometric unit, 21: Light Propagation part, 21a: front side, 21b: back side, 22: optical sensor, 24: Frenel mirror, 24a: top, 24b: groove part

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  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Computer Hardware Design (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Liquid Crystal (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Control Of El Displays (AREA)
PCT/JP2021/005106 2020-02-21 2021-02-10 表示画面からの出射光の検知方法、および表示装置 Ceased WO2021166780A1 (ja)

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US17/800,673 US20230138625A1 (en) 2020-02-21 2021-02-10 Method for detecting emitted light from display screen and display apparatus
CN202180011414.2A CN115023750B (zh) 2020-02-21 2021-02-10 显示画面的射出光的检测方法以及显示装置

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TW202132751A (zh) 2021-09-01
US20230138625A1 (en) 2023-05-04
CN115023750A (zh) 2022-09-06
JPWO2021166780A1 (https=) 2021-08-26
TW202141004A (zh) 2021-11-01
CN115023750B (zh) 2023-08-15
TWI776393B (zh) 2022-09-01
WO2021166796A1 (ja) 2021-08-26
JP7152628B2 (ja) 2022-10-12

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