JP2020021031A - Display system and multi-display using the same - Google Patents

Abstract

To provide a display system capable of reducing display quality differences between some or all of multiple displays, and a multi-display using the same.SOLUTION: A display system S1 includes: a degradation amount estimating unit 4 that estimates the degradation amount of each pixel constituting each of a plurality of displays 1; and an integrated correction amount determination unit 5 that is configured to calculate a first correction amount in each display 1 on the basis of the estimated degradation amount, and readjust and determine the integrated correction amount of the first correction amount of some or all of the other displays on the basis of the first correction amount of the reference display, while using one of the multiple displays 1 as a reference display. A multi-display is constituted of the plurality of displays 1 and the display system.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a display system for performing correction between a plurality of displays and a multi-display using the same.

  Conventionally, as a liquid crystal display device having a plurality of backlight light sources, and by appropriately adjusting the luminance between the backlight light sources to the same degree, a liquid crystal display device capable of reducing the luminance difference of a display unit formed by the backlight light sources, for example, No. 1 is known. This liquid crystal display measures the brightness of one backlight light source having the longest cumulative energization time among the plurality of backlight light sources with an optical sensor, and uses the obtained brightness as a reference brightness to determine the brightness of the other backlight light sources. The brightness is adjusted to be approximately the same as the brightness.

  Thereby, the brightness unevenness between the plurality of backlight light sources is reduced, and the liquid crystal display device has a uniform display quality among the plurality of display units formed by the respective backlight light sources.

Japanese Patent No. 4186522

  By the way, in recent years, technical development in the display field has been advanced, and a display having high display quality using a self-light emitting element such as an organic light emitting diode (OLED) as a light source has been proposed. For example, an OLED panel, which is a display device employing OLEDs as self-luminous elements, has a configuration in which pixels (light sources) each having 1920 × 1080 × 3 self-luminous elements are used in the case of a general resolution.

  In order to perform a correction (hereinafter, referred to as “brightness correction”) for reducing the luminance difference between pixels in such an OLED panel, it is necessary to reduce the luminance of the light source having the largest cumulative energization time among the light sources, such as the above-described liquid crystal display. A method of performing measurement and setting as a reference luminance cannot be adopted. This is because one display unit is composed of an enormous number of pixels, and it is difficult to measure the luminance of the pixel with the longest cumulative energization time.

  Therefore, as a method of performing the luminance correction in the OLED panel, a deterioration amount of each pixel as a light source is calculated based on a driving history such as a gradation (amount of power), a light emitting time, a temperature, and the like, and each pixel is determined by a predetermined value. There has been proposed a method of correcting a driving condition so as to obtain a luminance of. Thus, in an OLED panel having one display unit having a plurality of pixels, it is possible to adjust the luminance between the plurality of pixels to the same level without performing the luminance measurement.

  In addition, since it is difficult to increase the size of the OLED panel from the viewpoint of yield and manufacturing cost, a display system having a plurality of OLED panels has been proposed in recent years. In such a display system, not only maintenance of display quality in one OLED panel but also maintenance of display quality between each OLED panel is required. However, the above method can only maintain the display quality in one OLED panel.

  The present invention has been made in view of the above points, and it is possible to reduce a difference in display quality between some or all of a plurality of displays having a self-luminous element as a pixel. It is an object to reduce a display system and a multi-display using the display system.

  In order to achieve the above object, a display system according to claim 1, comprising a plurality of pixels each having a self-luminous element, and a plurality of displays (1) each having a display unit on which an image is displayed. And a plurality of display units based on a plurality of deterioration amount estimating units (4) for estimating deterioration amounts of a plurality of pixels and a deterioration amount estimated by the deterioration amount estimating unit. An integrated correction amount determining unit (5) for determining a correction amount of a driving condition of a pixel for each pixel, and a correction unit (6) for correcting a driving condition of a pixel based on the correction amount. In such a configuration, when determining the correction amount of a plurality of pixels constituting a part or all of the plurality of displays, the integrated correction amount determination unit determines the correction amount in the part or all of the displays. After comparing the deterioration amounts of a plurality of pixels, a reference for the deterioration amount is determined.

  According to this, even if a difference in display quality is caused between some or all of the plurality of displays due to a variation in brightness between the displays, the display of all or some of the displays is made. The correction of the driving condition of each pixel is performed after considering the deterioration amounts of the plurality of pixels in. Therefore, a display system capable of reducing a difference in display quality among some or all of a plurality of displays having a self-light emitting element as a pixel is provided.

  In addition, by combining a plurality of displays constituted by a plurality of pixels having self-luminous elements and the above display system, a difference in display quality between some or all of the displays has been reduced. It becomes a multi-display.

  In addition, the reference numerals in parentheses attached to the respective components and the like indicate an example of a correspondence relationship between the components and the like and specific components and the like described in the embodiments described later.

It is a block diagram showing the example of composition of the in-vehicle multi-display provided with the display system of a 1st embodiment. FIG. 2 is a block diagram illustrating a configuration example of a display system illustrated in FIG. 1. 2 is a flowchart illustrating an operation example of the display system in FIG. 1. It is a plane layout view showing an example of arrangement of a plurality of displays, (a) is an example of arrangement in which all displays are connected continuously, and (b) is an arrangement in which some displays are separated from other displays. Example, (c) is an example of arrangement in which all the display devices are separated from each other. It is a schematic diagram which shows an example of an integrated correction process, (a) is correction in a 1st display, (b) is correction in a 2nd display, (c) is correction in an nth display. It is a schematic diagram which shows an example of the integrated correction process in 2nd Embodiment, (a), (b), (c) is correction in a 1st display, a 2nd display, and an n-th display, respectively. . It is a schematic diagram which shows an example of the integrated correction process in 3rd Embodiment, Comprising: (a), (b), (c) is correction | amendment in a 1st display, a 2nd display, and an nth display, respectively. .

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, parts that are the same or equivalent are denoted by the same reference numerals and described.

(1st Embodiment)
The display system S1 according to the first embodiment will be described with reference to FIGS. The display system S1 is preferably applied to brightness correction in a multi-display having a plurality of displays 1, as shown in FIG. 1, for example. In the present embodiment, as shown in FIG. 1, an example in which the display system S1 is applied to a multi-display for in-vehicle use will be described. However, the display system S1 can of course be used for other purposes.

  First, a configuration example of an in-vehicle multi-display to which the display system S1 of the present embodiment is applied will be described.

  The in-vehicle multi-display includes, for example, a plurality of displays 1, a display system S1, an in-vehicle camera 100, a video input unit 101, and a speaker 102, as shown in FIG.

  The display 1 includes, for example, a plurality of pixels each including a self-luminous element and a thin film transistor for driving the self-luminous element, and displays various images based on an image signal from the image input unit 101. The display 1 can be referred to as an “OLED panel” when an OLED is employed as a self-light emitting element. This multi-display has a configuration having a plurality of displays 1, but the number of the displays 1 is arbitrary. The plurality of displays 1 are connected to a display system S1, for example, as shown in FIG. 1, and drive conditions, which will be described later, are corrected by the display system S1.

  In the following description, as shown in FIG. 1, in order to distinguish the plurality of displays 1, the number of the displays 1 is set to n (n: a natural number of 2 or more), and these displays 1 are referred to as “first display” for convenience. 1 display 11 "," second display 12 ", and" n-th display 1n ". FIG. 1 shows a case where n is a natural number of 3 or more, and the display 1 other than the displays 11, 12, and 1n is omitted.

  In the present embodiment, an example in which the display 1 is an OLED panel will be described. However, since the configurations of the OLED elements and the OLED panel are known, detailed descriptions thereof are omitted in this specification.

  For example, as shown in FIG. 1, the display system S1 is connected to external devices such as a vehicle-mounted camera 100, a video input unit 101, and a speaker 102, in addition to a plurality of displays 1, and outputs video signals and audio signals. The exchange of electric signals is performed.

  Note that the video input unit 101 is an arbitrary electronic device such as a car navigation system or various sensors for acquiring vehicle information in the case of an in-vehicle use. The external devices connected to the display system S1, such as the vehicle-mounted camera 100, the video input unit 101, and the speaker 102, are merely examples, and are not limited thereto, and may be appropriately changed.

[Configuration of Display System S1]
Next, a specific configuration of the display system S1 of the present embodiment will be described with reference to FIG.

  The display system S1 includes, for example, as shown in FIG. 2, a plurality of energization time acquisition units 2, a plurality of temperature information acquisition units 3, a plurality of deterioration amount estimation units 4, an integrated correction amount determination unit 5, And a correction unit 6. The display system S1 is, for example, an electronic control unit such as an ECU (abbreviation of Electronic Control Unit) including a CPU, a ROM, a RAM, a nonvolatile RAM, and the like. The display system S1 is configured such that various programs corresponding to, for example, deterioration amount estimation and drive condition correction, which will be described later, are stored in a storage unit such as a ROM (not shown), and the CPU reads and executes the programs.

  Hereinafter, as shown in FIG. 2, the number of the plurality of components of the display system S1, namely, the energization time acquisition unit 2, the temperature information acquisition unit 3, the deterioration amount estimation unit 4, and the correction unit 6, is indicated by the The case where the number is the same as n (n: a natural number of 2 or more) will be described.

  Also, for distinction, as shown in FIG. 2, the energization time acquisition unit 2 includes a “first energization time acquisition unit 21”, a “second energization time acquisition unit 22”, and an “n-th energization time acquisition unit”. 2n ". Further, the temperature information acquisition units 3 are referred to as a “first temperature information acquisition unit 31”, a “second temperature information acquisition unit 32”, and an “n-th temperature information acquisition unit 3n”, respectively. Similarly, the deterioration amount estimating unit 4 is referred to as a “first deterioration amount estimating unit 41”, a “second deterioration amount estimating unit 42”, and an “n-th deterioration amount estimating unit 4n”. These are referred to as “first correction unit 61”, “second correction unit 62”, and “n-th correction unit 6n”. In addition, the first display 11, the first energization time acquisition unit 21, the first temperature information acquisition unit 31, the first deterioration amount estimation unit 41, and the first correction unit 61 constitute one unit, and the second to Similarly, each of the n-th constituent elements also constitutes one unit. Also, as shown in FIG. 2, various electric signals corresponding to each unit are referred to as “first video signal”, “second video signal”, and “n-th video signal”, and “first temperature signal”, These are referred to as “second temperature signal” and “n-th temperature signal”.

  The energization time acquisition unit 2 acquires information on energization time of each pixel constituting the display 1 based on a video signal corresponding to an image to be displayed on the display 1 and an electric signal from a time measurement unit such as a timer (not shown). get. The energization time acquisition unit 2 transmits the acquired energization time information of each pixel to the deterioration amount estimation unit 4, as shown in FIG. The number of energization time acquisition units 2 is arbitrary, but is the same as the number of indicators 1 in the present embodiment. In this case, as illustrated in FIG. 2, the first energization time acquisition unit 21 acquires energization time information of each pixel included in the first display 11 and outputs an electric signal to the first deterioration amount estimation unit 41. .

  The temperature information acquisition unit 3 acquires temperature information about the display unit of the display 1 based on an electric signal corresponding to the temperature of the display unit of the display 1 using an external temperature sensor (not shown). The temperature information acquisition unit 3 transmits the acquired temperature information of the display 1 to the deterioration amount estimation unit 4. In addition, an external temperature measurement unit (for example, a temperature sensor or the like) (not shown) that measures the temperature of the display unit of the display 1 is attached to an arbitrary position.

  The deterioration amount estimating unit 4 estimates the degree of deterioration of each pixel of the display 1, that is, the deterioration amount, based on the information obtained from the energization time obtaining unit 2 and the temperature information obtaining unit 3. Specifically, for example, the deterioration amount estimating unit 4 reads a program for calculating the deterioration amount of a pixel stored in a ROM (not shown), and calculates the deterioration amount based on the energization time and temperature history accumulated for each pixel. I do. The deterioration amount estimating unit 4 transmits information on the estimated deterioration amount of each pixel to the integrated correction amount determining unit 5, as shown in FIG.

  The amount of deterioration of the OLED element can be estimated by using, for example, the following equation (1) used in a known method for estimating the life of an OLED as an estimated deterioration curve.

L = α ₀ × exp (−t × β ₀ ) + α ₁ × exp (−t × β ₁ ) (1)
The equation (1) is a known theoretical equation obtained by dividing the deterioration of the OLED into two components, an initial deterioration having a large deterioration amount (that is, a luminance reduction amount) and a normal deterioration having a small deterioration amount thereafter. In equation (1), L is luminance, α ₀ and β ₀ are coefficients in initial deterioration, α ₁ and β ₁ are coefficients in normal deterioration after initial deterioration, and t is elapsed time.

  When an OLED element constituting a pixel is driven with a predetermined constant current, the measured value of the temporal change of the luminance of the OLED element is applied to the above equation (1) to calculate various coefficients, thereby calculating the elapsed time. An estimated deterioration curve indicating the relationship with the pixel brightness is created in advance. At this time, for the OLED element, an acceleration coefficient corresponding to the initial luminance and an acceleration coefficient corresponding to the environmental temperature are calculated, and various estimated deterioration curves corresponding to the current amount and the environmental temperature are created. The data of the various estimated deterioration curves obtained in this way are stored in a ROM (not shown) or the like, and the measured elapsed time and temperature of each pixel are applied to the estimated deterioration curve. This makes it possible to estimate the degree of deterioration of each pixel due to the accumulated energizing time, the temperature history, or a factor obtained by integrating them. Note that the estimation of the deterioration amount of each pixel is not limited to the above-described method, and another known method may be employed.

  The integrated correction amount determination unit 5 determines the correction amount between some or all of the plurality of correction units 6 described below in order to reduce the difference in display quality between some or all of the plurality of displays 1. Make a decision.

  Specifically, the integrated correction amount determination unit 5 determines the driving condition to be executed by each correction unit 6 based on the deterioration amount of each pixel constituting each display 1 estimated by each deterioration amount estimation unit 4. Determine the correction amount. Then, the integrated correction amount determination unit 5 uses, for example, one of the displays 1 as a reference to reduce a difference in display quality between some or all of the displays 1 among the plurality of displays 1. Based on the estimated deterioration amount of a predetermined pixel in one display 1, the correction amount in another display 1 is determined.

  Note that the determination of the correction amount by the integrated correction amount determination unit 5 is not limited to being performed based on the estimated deterioration amount of the predetermined pixel, but is based on the average of the estimated deterioration amount of each pixel of the predetermined display 1. It may be performed, or may be performed based on another estimated deterioration amount.

  Hereinafter, for the sake of simplicity, the correction amount of the other display 1 determined by the integrated correction amount determination unit 5 is referred to as “integrated correction amount”. In the determination of the integrated correction amount by the integrated correction amount determination unit 5, some or all of the plurality of displays 1 are used as a reference for integrated correction for reducing a difference in display quality. One display 1 is referred to as a “reference display” for convenience. Further, the display 1 on which the integrated correction is performed by the reference display is referred to as a “target display” for convenience.

  That is, in the present embodiment, the integrated correction amount determination unit 5 determines one of the plurality of displays 1 as a reference display, and re-adjusts the correction amount of the target display based on the reference display. , And serves to equalize the display quality between the reference display and the target display. In other words, the integrated correction amount determination unit 5 sets the correction amount of each display 1 calculated based on the estimated deterioration amount by the deterioration amount estimating unit 4 as the “first correction amount” and sets the correction amount of the reference display unit as the first correction amount. Based on this, the first correction amount of the target display is readjusted to determine the second correction amount, that is, the integrated correction amount. The correction amount in each display 1 determined by the integrated correction amount determination unit 5 is transmitted to each correction unit 6 as shown in FIG. The details of the determination of the integrated correction amount by the integrated correction amount determination unit 5 will be described later.

  The correction unit 6 determines a driving condition of each pixel based on the first correction amount or the integrated correction amount calculated by the integrated correction amount determination unit 5 in order to reduce a luminance difference between pixels in each display 1. Is corrected. That is, the correction unit 6 performs the brightness correction in each display 1 based on the first correction amount or the integrated correction amount. As a correction of the driving condition of each pixel, for example, it is conceivable to adjust a current amount (gradation) so that each pixel has the same brightness as the initial brightness. In addition, as a method of correction, a method of adjusting a current amount to be equivalent to the luminance of a pixel based on the luminance of another pixel with reference to one pixel among the pixels whose luminance has been reduced from the initial luminance is also used. Alternatively, any other method may be employed.

  In the following description, the correction performed by the correction unit 6 based on the integrated correction amount is referred to as “integrated correction”.

[Operation example]
Next, an operation example of the display system S1 will be described with reference to FIGS.

  The display system S1 starts the operation shown in FIG. 3, for example, when the ignition of the automobile is turned on and the plurality of indicators 1 are turned on.

  In step S301, a video signal is input to the display system S1 by the in-vehicle camera 100 or the video input unit 101. Subsequently, the CPU proceeds with the process to step S302. In step S302, the plurality of energization time acquisition units 2 acquire the accumulated energization time of each pixel in each of the plurality of displays 1 based on the video signal and the time information obtained by the unillustrated time measurement unit. In subsequent step S303, the plurality of temperature information acquisition units 3 acquire the temperature information of the display units of the plurality of displays 1.

  Although an example in which step S303 is executed after step S302 has been described, the order may be reversed or the steps may be executed simultaneously.

  Next, in step S304, the deterioration amount estimating unit 4 estimates the deterioration amount of each pixel of each of the plurality of displays 1 based on the accumulated energization time obtained in step S302 and the temperature information obtained in step S303. Then, the integrated correction amount determination unit 5 calculates a first correction amount for each pixel based on the estimated deterioration amount. Subsequently, the CPU proceeds with the process to step S305.

  In step S305, the integrated correction amount determination unit 5 determines whether or not integrated correction is necessary for some or all of the plurality of displays 1. If it is determined that the integrated correction is necessary, that is, if YES in step S305, the CPU proceeds with the process to step S306.

  Here, an example of a criterion for determining whether to execute the integration correction will be described with reference to FIG.

  4 (a) to 4 (c), for simplicity of description, the left and right directions of the vehicle on which the display system S1 is mounted and the up and down directions orthogonal thereto are defined by arrows for convenience. In FIG. 4A, for example, four displays 11 to 14 are continuously arranged so as to be connected, and an electronic mirror, a CID (center information display), a CID (center information display), and the like are arranged in order from the first display 11 to the fourth display 14. The example used as a meter and an electronic mirror is shown. Further, FIG. 4A illustrates an example in which the first display 11 is an electronic mirror for displaying an image on the left side of the vehicle, and the fourth display 14 is an electronic mirror for displaying an image on the right side of the vehicle.

  For example, as shown in FIG. 4A, when the user is looking at the second display 12 used as a CID, a third display 13 used as a meter can enter the field of view of the user. At this time, if there is a luminance difference equal to or more than a predetermined value between each pixel of the second display 12 and each pixel of the third display 13, that is, a difference in display quality, the user feels discomfort and the visibility is reduced. Would. Therefore, in order to suppress such a problem by adjusting the display quality to the same level, integrated correction between the second display 12 and the third display 13 is performed.

  Here, "matching the display quality to the same degree" means that the variation in luminance between the display devices 1 is set to a predetermined value or less, and that a sense of incongruity in human vision is eliminated. This predetermined value is appropriately changed according to specifications and the like.

  On the other hand, in the example illustrated in FIG. 4A, it is difficult to assume that the user simultaneously views the electronic mirror of the first display 11 and the electronic mirror of the fourth display 14. As described above, regarding the display devices 1 that are unlikely to enter the field of view of the user at the same time, even if there is a difference in their display qualities, there is no particular hindrance, so that the integrated correction may not be performed.

  Note that the number and arrangement of the plurality of display devices 1 are arbitrary, and are not limited to the example shown in FIG. For example, as shown in FIG. 4B, the first display 11, the second display 12, the third display 13, and the fourth display 14 are arranged in this order from the left in the left-right direction on the paper surface, and Even when the fifth display 15 is arranged below the display 12, the integrated correction can be made in the same way. That is, the second display 12, the fifth display 15 used as the CID, and the third display 13 used as the meter are integrated and corrected, and the first display 11, the fourth display used as the electronic mirror are provided. 14 may be individually corrected independently of these. Also, as shown in FIG. 4 (c), even if the indicators 11 to 15 in FIG. 4 (b) are arranged apart from each other, it is determined whether or not to execute the integrated correction based on the same concept. Can be determined.

  Also, in the above description, an example in which the target for which the integrated correction amount is determined based on the arrangement of the plurality of displays 1 has been described, but the integrated correction amount determination is performed according to the type of video displayed by the display 1, that is, the design of the video. May be determined. For example, the display devices 1 used as CIDs or the display devices 1 used as meters may be the targets of the integrated correction, or the target of the integrated correction may be determined comprehensively according to the arrangement and the type of the design. Good. As described above, the target of the integrated correction may be determined by an arbitrary index.

  In step S306, the integrated correction amount determination unit 5 determines the integrated correction amount for the target display to be subjected to the integrated correction determined by the above method among the plurality of displays 1. Specifically, the integrated correction amount determination unit 5 sets one of the plurality of displays 1 as a reference display, and further calculates the first correction amount of another target display based on the estimated deterioration amount of each pixel. The correction is performed to determine a second correction amount, that is, an integrated correction amount. Thereafter, the CPU proceeds with the process to step S307.

  In step S307, each correction unit 6 corrects the driving condition of each pixel in each display 1 based on the integrated correction amount determined by the integrated correction amount determination unit 5. Thereafter, the CPU proceeds with the process to step S308.

  On the other hand, if it is determined in step S305 that the integration correction is unnecessary, that is, if NO in step S305, the CPU proceeds with the process to step S309. In step S309, the integrated correction amount determination unit 5 transmits the first correction amount calculated based on the estimated deterioration amount of each pixel of each display 1 to each correction unit 6 as it is. In step S310, each correction unit 6 corrects the driving condition of each pixel in each display 1 based on the first correction amount calculated by the integrated correction amount determination unit 5. That is, in step S310, each correction unit 6 performs independent correction of the driving conditions, that is, individual correction, for each display 1 without being affected by the deterioration state of the other display 1. Thereafter, the CPU proceeds with the process to step S308.

  In addition, the individual correction is performed in such a manner that each pixel constituting one display 1 is not affected by the deterioration amount of each pixel in another display 1 in one display 1. It can also be said to be a correction for reducing the luminance variation in 1.

  In step S308, each display 1 drives (emits light) each pixel based on the video signal and the driving conditions corrected by the integration correction or the individual correction to display various images.

  The display system S1, for example, as shown in FIG. 3, repeats the operation processing of steps S301 to S308 at predetermined intervals until each display 1 is turned off.

(Integrated correction)
Next, an example of the integrated correction by the integrated correction amount determination unit 5 will be described with reference to FIG.

  FIG. 5 shows the relationship between the elapsed time and the relative luminance indicating the ratio of the luminance of each pixel to an arbitrary initial luminance. The relative luminance of each pixel at a certain elapsed time t is represented by a white circle and each pixel is represented by a white circle. Are averaged (hereinafter, referred to as “average degradation curve”) with a solid line. In FIG. 5, the second display 12 shown in FIG. 5B is a reference display which is a reference of the integrated correction, and the other displays 1 shown in FIGS. The degradation curve is indicated by a broken line, and the direction in which the relative luminance is adjusted by correcting each pixel is indicated by a white arrow.

  Note that the “elapsed time” here simply refers to the time elapsed since each display 1 was turned on, and is a different concept from the accumulated driving time obtained by accumulating the driving time for each pixel. . In FIG. 5, it means that the lower the relative luminance is, the larger the deterioration amount is.

  5 (a) to 5 (c), among the displays 1, the one having the lowest average deterioration curve, that is, the second display 12 having a large amount of deterioration is used as a reference display, and the average deterioration curve is used as the reference display. An example in which integrated correction of another display 1 is executed as a reference curve is shown. More specifically, in the second display 12, for each pixel constituting the second display 12, as shown in FIG. 5B, the relative luminance on the average deterioration curve is used as a reference, The correction amount is determined so that In the target display device different from the second display device 12 among the plurality of display devices 1, for each pixel constituting the target display device, as shown in FIGS. The correction amount is determined so that the luminance becomes equivalent to the relative luminance on the curve.

  As a result, in each of the displays 1, the variation in the brightness within the display 1 is reduced, and the variation in the brightness between the reference display and the target display is also reduced, and the display quality is adjusted to the same degree. be able to. Further, since the average deterioration curve of the display 1 having the lowest average deterioration curve is used as a reference and the correction of each pixel of the other display 1 is executed in accordance with the reference, the load due to the driving of each pixel of the other display 1 is adjusted. Is expected to be reduced and the life is extended. Further, the effect of improving the appearance and reducing the power consumption by reducing the luminance variation is expected.

  According to the present embodiment, the display system S1 is capable of reducing a difference in display quality among a part or all of the plurality of displays 1 having pixels as self-luminous elements. Further, by using the display system S1, a multi-display in which a variation in display quality among the plurality of displays 1 is suppressed is obtained.

(2nd Embodiment)
A display system according to the second embodiment will be described with reference to FIG.

  In FIG. 6, the relationship between the elapsed time and the relative luminance is shown, and the relative luminance of each pixel at a certain elapsed time t is indicated by a white circle, and the relative luminance among the pixels constituting the display 1 is the lowest. The estimated deterioration curve of the pixel (hereinafter referred to as “minimum deterioration curve”) is indicated by a solid line. In FIG. 6, the second display 12 shown in FIG. 6B is a reference display which is a reference of the integrated correction, and the other displays 1 shown in FIGS. The degradation curve is indicated by a broken line, and the direction in which the relative luminance is adjusted by correcting each pixel is indicated by a white arrow.

  As shown in FIG. 6, the display system according to the present embodiment differs from the first embodiment in that the correction processing in the reference display and the target display in the integrated correction by the integrated correction amount determination unit 5 is different. In the present embodiment, this difference will be mainly described.

  In the present embodiment, the reference display in the integrated correction is the display 1 having the pixel with the lowest relative luminance among the plurality of displays 1. More specifically, in the examples shown in FIGS. 6A to 6C, when the minimum deterioration curves of the respective displays 1 are compared, the second display 12 has the one with the largest decrease in relative luminance. Therefore, the reference display is the second display 12.

  As shown in FIG. 6B, in the second display 12 that is the reference display, a pixel different from the pixel having the lowest relative luminance (hereinafter, referred to as “reference pixel” in the present embodiment) among the pixels. The correction amount is adjusted so that the luminance becomes substantially the same as the luminance of the reference pixel.

  On the other hand, in the other displays 1, which are target displays, that is, the first display 11 and the n-th display 1n, as shown in FIGS. The correction amount is adjusted so that the luminance becomes substantially the same as the luminance of the pixel. That is, in the target display, each pixel is corrected by the integrated correction amount determined based on the estimated deterioration amount of the reference pixel of the reference display.

  That is, in the present embodiment, the integrated correction amount determination unit 5 sets the pixel having the lowest relative luminance as a reference pixel and corrects the other pixels of the display 1 having the reference pixel and each pixel of the other display 1. The amount is adjusted, and integrated correction is performed so that the luminance of all pixels is almost the same.

  According to the present embodiment, as in the first embodiment, a display system is obtained in which an effect of reducing a difference in display quality of a part or all of the plurality of displays 1 can be obtained. Further, in the present embodiment, since the luminance of each display 1 is reduced as a whole because the pixel having the lowest relative luminance is used as a reference, the effect of reducing the power consumption is higher than that of the first embodiment. At the same time, it is expected that the load due to the energization of each pixel is reduced and the life is extended.

(Third embodiment)
A display system according to the third embodiment will be described with reference to FIG.

  In FIG. 7, as in FIG. 5, the relationship between the elapsed time and the relative luminance is shown, and the relative luminance of each pixel at a certain elapsed time t is indicated by a white circle, The deterioration curve of the pixel having the highest relative luminance (hereinafter referred to as the “maximum deterioration curve”) is indicated by a solid line. Further, in FIG. 7, the n-th display 1n shown in (c) is a reference display which is a reference of the integrated correction, and the other displays 1 shown in (a) and (b) have the highest reference display. The degradation curve is indicated by a broken line, and the direction in which the relative luminance is adjusted by correcting each pixel is indicated by a white arrow.

  As shown in FIG. 7, the display system of the present embodiment differs from the above-described first embodiment in that the correction processing in the reference display and the target display in the integrated correction by the integrated correction amount determination unit 5 is different. In the present embodiment, this difference will be mainly described.

  In the present embodiment, the reference display in the integrated correction is the display 1 having the pixel with the lowest relative luminance among the plurality of displays 1. Specifically, in the examples shown in FIGS. 7A to 7C, when the minimum deterioration curves of the respective displays 1 are compared, the n-th display 1n has the one with the smallest decrease in relative luminance. Therefore, the reference display is the n-th display 1n.

  In the n-th display 1n, which is the reference display, as shown in FIG. 7C, a pixel different from the pixel having the highest relative luminance (hereinafter, referred to as “reference pixel” in the present embodiment) among the pixels is , The correction amount is adjusted so that the luminance becomes substantially the same as the luminance of the reference pixel.

  On the other hand, as shown in FIGS. 7A and 7B, in the other displays 1, which are the target displays, that is, the first display 11 and the second display 12, each of the pixels constituting them is the reference display. The correction amount is adjusted so that the luminance becomes substantially the same as the luminance of the pixel. That is, in the target display, each pixel is corrected by the integrated correction amount determined based on the estimated deterioration amount of the reference pixel of the reference display.

  That is, in the present embodiment, the integrated correction amount determination unit 5 sets the pixel having the highest relative luminance as a reference, and sets all pixels of the display 1 having the reference pixel and all the other displays 1 to the same degree as the reference pixel. Integrated correction for adjusting the correction amount so as to match the luminance of the image.

  According to the present embodiment, as in the first embodiment, a display system is obtained in which an effect of reducing a difference in display quality of a part or all of the plurality of displays 1 can be obtained. Further, in the present embodiment, since the pixel having the highest relative luminance is used as a reference, the power consumption is higher than in the first embodiment, but the luminance of each display 1 is generally higher and the visibility is higher. Is expected to be higher.

(Other embodiments)
Note that the display system and the multi-display using the display system described in each of the above-described embodiments are merely examples of the present invention, and are not limited to the above-described embodiments. Changes can be made as appropriate within the described range.

  In each of the above embodiments, the example of the determination of the integrated correction amount has been described. However, the present invention is not limited to these examples as long as the difference in display quality between a part or all of the display devices 1 can be reduced.

  For example, the integrated correction amount determination unit 5 integrates each display 1 based on a deterioration curve obtained by averaging an average deterioration curve of each display 1 to be integrated corrected among the plurality of displays 1. The correction amount may be determined. The reference for the integrated correction amount is not limited to the above, and may be the largest one of the average deterioration curves of the indicators 1 to be subjected to the integrated correction, or a deterioration curve obtained by averaging the lowest deterioration curves. May be present, or may be the largest one of the minimum deterioration curves. In addition, the average of the maximum deterioration curves of the indicators 1 to be integrated and the minimum one of the maximum deterioration curves may be used as the reference for determining the integrated correction amount. As described above, the reference of the integrated correction amount may be appropriately changed.

  In summary, the integrated correction amount determining unit 5 determines the integrated correction amount of a plurality of pixels constituting a part or all of the plurality of displays 1 when determining the integrated correction amount of the plurality of pixels. After comparing the estimated deterioration amounts of a plurality of pixels in 1, the reference of the estimated deterioration amount is determined. Then, the integrated correction amount determination unit 5 determines the integrated correction amount for each pixel over the plurality of displays 1 based on the determined reference of the estimated deterioration amount.

REFERENCE SIGNS LIST 1 display 2 energization time acquisition unit 3 temperature information acquisition unit 4 deterioration amount estimation unit 5 integrated correction amount determination unit 6 correction unit

Claims (4)

A display system configured by a plurality of pixels having self-luminous elements and performing brightness correction between a plurality of displays (1) having a display unit on which an image is displayed,
A plurality of deterioration amount estimation units (4) for estimating deterioration amounts of the plurality of pixels;
An integrated correction amount determination unit (5) that determines a correction amount of the driving condition of the pixel for each of the plurality of displays based on the deterioration amount estimated by the deterioration amount estimation unit;
A correction unit (6) that corrects the driving condition of the pixel based on the correction amount,
The integrated correction amount determination unit, when determining the correction amount of the plurality of pixels constituting a part or all of the plurality of displays, the part or all of the displays A display system for comparing the deterioration amounts of the plurality of pixels and determining a reference of the deterioration amount.   The integrated correction amount determination unit, the predetermined display as a reference display, based on the deterioration amount of the predetermined pixel of the plurality of pixels constituting the reference display, the plurality of displays 2. The display system according to claim 1, wherein the correction amount of the plurality of pixels constituting part or all of the display units different from the reference display unit is determined. 3.   The integrated correction amount determination unit, based on the average obtained by averaging the deterioration amount of the plurality of pixels in some or all of the plurality of displays, the plurality of displays 2. The display system according to claim 1, wherein the correction amount of the plurality of pixels constituting part or all of the display is determined. 3. The plurality of indicators,
A multi-display comprising: the display system according to claim 1.

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