JP2011109188A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device adjusting brightness of a screen appropriately by detecting either a background luminance around the screen of a display device body including the screen and a background luminance around a user of the display device or a color temperature around the screen and a color temperature around a user, and by utilizing the detected result. <P>SOLUTION: The display device comprises the body including the screen and a remote controller for controlling the body. The remote controller includes a remote controller background luminance acquisition unit for acquiring a remote controller background luminance, namely a background luminance around the remote controller. The body includes: a screen background luminance acquisition unit for acquiring a screen background luminance, namely a background luminance around the screen; and a screen luminance adjustment unit for utilizing the acquired screen background luminance and the acquired remote controller background luminance to adjust the luminance of the screen. Also, the display device, which uses the color temperature instead of luminance, namely a value to be processed, is included. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a display device, and in particular, has means for adjusting the brightness of the screen using the background luminance around the screen and the background luminance around the remote control, or the color temperature around the screen and the color temperature around the remote control. The present invention relates to a display device.

  When viewing television, it is desirable to view with appropriate screen brightness according to the brightness of the room. In a bright room, a brighter screen looks better, and in a dark room, a darker screen looks better. However, when a bright screen is viewed in a dark room, the dark portion becomes bright, and the contrast ratio is lowered, resulting in poor image quality. Also, if you keep watching a screen that is too bright for a long time, your eyes may become tired or cause myopia or astigmatism. In a more severe case, there was an event where the child fainted by being blinded by the flashing strong light emitted from the animation screen. On the other hand, when a dark screen is viewed in a bright room, the bright part becomes dark, which also reduces the contrast ratio and deteriorates the image quality.

  In order to avoid this, conventionally, a method of adjusting the brightness of the television screen based on the background brightness (the brightness around the light emitter converted into the brightness) has been used. Specifically, a television main body equipped with a screen was provided with a sensor for detecting the background luminance of the surrounding area, and the brightness of the television screen was automatically adjusted according to the detected background luminance. . For example, Patent Document 1 has brightness detection means for detecting the brightness around a television receiver and brightness detection means for detecting the brightness level of the input video signal. A television receiver configured to calculate an optimal contrast correction value based on the luminance level of the video signal and the ambient brightness level, and to control the video signal processing circuit based on the calculated contrast correction value A machine is disclosed (see Patent Document 1).

  In general, the minimum brightness contrast (C) that can be identified can be obtained by the following expression (Expression 1) using the brightness (Lo) and background brightness (Lb) of the object to be viewed.

(Equation 1)
C = (Lb−Lo) / Lb

  According to the example of television, the luminance (Lo) of the visual target is the luminance of the television screen, and the background luminance (Lb) is the peripheral luminance that affects the luminance of the television screen. This background luminance is a luminance that is considered to be adapted to the viewer's eyes, and is affected by the viewing environment of the viewer. As can be seen from this equation, in order to keep the minimum luminance contrast (C) that can be identified constant, when the background luminance (Lb) changes in the higher direction, the luminance (Lo) of the visual target is increased, and the background luminance (Lb) ) Changes in a lower direction, the luminance (Lo) of the visual target may be lowered. In the conventional method, only the background luminance around the television body is detected as the background luminance. In order to prevent the viewer from changing the brightness level of the screen even if the background brightness around the television body changes (in other words, the viewer may feel that the screen is as clean as before the background brightness changes). In order to be able to do this, the brightness of the television screen is adjusted based only on the detection result of the background brightness around the television body. Specifically, when the background brightness around the detected television body is higher (brighter) than a certain standard brightness set in advance, the brightness of the television screen is increased to detect the detected television. When the background luminance around the main body is lower (darker) than the reference, correction is made to lower the luminance of the television screen.

JP-A-6-303551

  In recent years, large-screen televisions using liquid crystal and plasma are rapidly spreading. In these large-screen televisions, there are many opportunities for viewers to watch television at a certain distance from the television main body with the screen, and the background luminance around the television main body and the background luminance around the viewer are different. Sometimes. In this case, in order to know the background brightness accurately, it is necessary to detect not only the background brightness around the television body but also the background brightness around the viewer. This is because, for example, even if the surrounding area of the television body is standard brightness, if the surrounding area of the viewer is darker than that, the viewer's eyes are adapted to a relatively dark environment. The minimum brightness contrast cannot be maintained without reducing the brightness of the screen. (To put it plainly, viewers cannot feel that the entire room is as clean as it is at standard brightness. )

  However, in the conventional method of detecting only the background brightness around the television body as the background brightness, the background brightness around the viewer cannot be detected, so the background brightness cannot be accurately known, As a result, if the background brightness around the television body and the background brightness around the viewer are different, the screen brightness can be adjusted to an appropriate brightness that allows the viewer to feel a clean screen. could not.

  Such a problem is not limited to a television device, and can be caused equally if the background brightness around the main body and the viewer is different, such as a monitor device without a tuner. However, with regard to display devices in general including such devices, the background luminance of both the periphery of the display device main body and the periphery of the display device user (viewer, etc.) is detected and used to determine the screen luminance. It has not been done so far to adjust properly.

  In addition, as a problem similar to the case of background luminance as described above, the viewing environment of the viewer depends on the color temperature around the main body and the viewer (the color of light emitted from the object is expressed as a quantitative value). There is also a problem of being affected. In other words, when you look at the screen in a room with a low color temperature, you feel that the color temperature is higher than when you look in a room with a standard color temperature (specifically, the screen feels paler than it actually is), and the image quality is high. It gets worse. Conversely, when you look at the screen in a room with a high color temperature, you feel that the color temperature is lower than when you look at it in a room with a standard color temperature (specifically, the screen is more yellowish than the actual color). The image quality will deteriorate. However, some conventional television apparatuses can switch the color temperature according to the selection of the user according to various sources. However, the color temperature around the television body or the viewer is detected. However, there has been no device that can appropriately adjust the color temperature of the screen using this.

  Therefore, the problem to be solved by the present invention is to detect the background luminance around the screen of the display device body provided with the screen and the background luminance around the user of the display device, or the color temperature around the screen and the color temperature around the user, An object of the present invention is to provide a display device that can appropriately adjust the brightness of the screen using the detection result.

In order to solve the above problems, in the present invention, the background luminance / color temperature around the remote control is used as the background luminance / color temperature around the user of the display device.
That is, the first invention is a display device comprising a main body with a screen and a remote control for controlling the main body, the remote control for acquiring a remote control background luminance that is a background luminance around the remote control. It has a remote control background luminance acquisition unit, and the main unit uses the screen background luminance acquisition unit for acquiring the screen background luminance that is the background luminance around the screen, the acquired screen background luminance, and the acquired remote control background luminance. And a screen brightness adjusting unit for adjusting the screen brightness.
The second aspect of the invention is based on the first aspect of the invention, and the screen brightness adjustment unit obtains the screen background brightness, the remote control background brightness, and an adjustment value for adjusting the screen brightness according to a combination thereof. Rule holding means for holding a rule to be associated is provided, and this rule provides a display device that is determined to perform the adjustment as follows. That is, (1) the combination tendency of the screen background luminance and the remote control background luminance and the corresponding (2) the tendency of the adjustment value of the screen luminance are determined in the following four ways from (a) to (d). A display device is provided.
(A) (1) is “high” and “2” is “higher than average”.
(A) (1) is “Low” and (2) is “Lower than average”.
(C) “1” is “high” and “2” is “slightly lower than average”.
(D) “1” is “low” and “2” is “slightly higher than average”.
A third invention provides a display device according to the first or second invention, wherein the color temperature is used instead of the luminance which is a value to be processed.

  According to the present invention, the background luminance around the screen of the display device main body including the screen and the background luminance around the user of the display device, or the color temperature around the screen and the color temperature around the user are detected, and the detection result is used. Thus, it is possible to provide a display device capable of appropriately adjusting the brightness of the screen.

Conceptual diagram for explaining the outline of the present invention FIG. 3 is a diagram illustrating an example of functional blocks of the display device according to the first embodiment. FIG. 3 is a diagram illustrating an example of functional blocks of the display device according to the first embodiment. The figure which shows an example of the rule which a rule holding means hold | maintains Schematic which shows an example of the hardware constitutions of a main body among the display apparatuses of Example 1. FIG. Schematic which shows an example of the hardware constitutions of a main body among the display apparatuses of Example 1. FIG. Schematic which shows an example of the hardware constitutions of a remote control among the display apparatuses of Example 1. FIG. The figure which shows an example of the functional block of the display apparatus of Example 2. The figure which shows an example of the functional block of the display apparatus of Example 2. The figure which shows an example of the rule which a rule holding means hold | maintains Schematic which shows an example of the hardware constitutions of a main body among the display apparatuses of Example 2. FIG. Schematic which shows an example of the hardware constitutions of a main body among the display apparatuses of Example 2. FIG. Schematic which shows an example of the hardware constitutions of a remote control among the display apparatuses of Example 2. FIG.

0100 Display device (television device)
0110 Main body 0111 Screen 0112 Sensor for detecting background brightness around screen 0120 Remote control 0121 Sensor for detecting background brightness around remote control 0130 User (viewer)
Lighting device 0212 Screen background luminance acquisition unit 0213 Screen luminance adjustment unit 0221 Remote control background luminance acquisition unit 0812 Screen color temperature acquisition unit 0813 Screen color temperature adjustment unit 0821 Remote control color temperature acquisition unit

  Examples of the present invention will be described below. The relationship between the embodiments and the claims is as follows. The first embodiment mainly relates to claims 1 and 2, and the second embodiment mainly relates to claim 3 and the like. In addition, this invention is not limited to these Examples at all, and can be implemented in various modes without departing from the gist thereof.

<Overview>
The display device according to the present embodiment includes a main body and a remote control, and the remote control has means for acquiring background luminance around the remote control, and the main body has means for acquiring background luminance around the screen, and acquisition. The display device has means for adjusting the screen brightness using the background brightness around the screen and the background brightness around the remote control.

FIG. 1 is a conceptual diagram for explaining the outline of the present invention. First, the outline of the present invention will be described with reference to FIG.
This figure shows an example in which the display device is a television device. A display device (television device) 0100 shown in this figure includes a main body 0110 having a screen and a remote controller 0120. This figure shows a state in which a user (viewer) 0130 is watching a television while holding the remote control at hand. The television shown in the figure is a so-called large-screen television, and the viewer views it with the viewer away from the screen to some extent. For this reason, the lighting device 0140 located in the room relatively close to the main body of the television apparatus is relatively bright around the television screen, while the surroundings of the viewer (which is also around the remote control at the same time) are compared. It is in a dark state.

  The main body of the television device is provided with a sensor 0112 for detecting the background luminance around the screen. This is the same as the conventional apparatus. In the case of a conventional apparatus, the screen brightness is adjusted based on the background brightness around the screen detected by this sensor. That is, in the case as shown in this figure, it is determined that the periphery of the screen is bright and the background luminance is high. Therefore, the luminance of the television screen to be viewed is set to a level higher than the average according to the above relational expression. Adjustments have been made. That is, in the case of a conventional apparatus, the background luminance detected by the sensor provided in the main body is regarded as the background luminance of the entire room. At this time, if the vicinity of the viewer is also bright, there is no problem even with such adjustment. However, as shown in this figure, when the background brightness around the viewer is low, the viewer's eyes are also adapting to this low background brightness, so in the high brightness screen adjusted as above, It is too bright for viewers to feel as beautiful as the entire room is bright.

  For this reason, as shown in the figure, the display device of the present invention (the television device in the example of the figure) is provided with a sensor 0121 for detecting the background luminance also on the remote control with a high probability that is close to the viewer. The background brightness around the remote control is detected. Then, the detection result of the background luminance around the remote controller is transmitted to the main body and acquired on the main body side. Thus, the main body can adjust the screen brightness based on both the background brightness around the screen detected by its own sensor and the background brightness around the remote control detected and transmitted by the remote controller. Although not shown, the main body is provided with means for adjusting the screen brightness. In the case of this figure, the background luminance around the screen acquired by the main unit is relatively high, whereas the background luminance around the remote control acquired by the remote control and transmitted to the main unit is relatively higher than this. Low. Therefore, the screen luminance adjustment unit of the main body adjusts the screen luminance to a level slightly lower than the average based on both of these background luminances. That is, in the conventional device, the screen luminance is adjusted to a level higher than the average based only on the high luminance around the screen, whereas the high luminance around the screen and the viewer's periphery are adjusted according to the device of the present invention. The screen brightness is adjusted to a level lower than this (a level slightly lower than the average) based on the lower brightness. As a result, the screen brightness is appropriate for the viewer whose eyes are adapted to the low background brightness around the user, and the viewer can feel a beautiful screen.

<Configuration>
(Display devices in general)
Next, the configuration of the display device will be described. FIG. 2 is a diagram illustrating an example of functional blocks of the display device according to the present embodiment. As shown in the figure, the “display device” 0200 of this embodiment includes a “main body” 0210 provided with a “screen” 0211 and a “remote control” 0220 for controlling the main body.
The “display device” widely includes devices having a display screen (display) for displaying an image (whether it is a moving image or a still image), and the type thereof is not limited. Typically, a television apparatus such as a large screen television corresponds to this, but a monitor apparatus that does not include a tuner may be used. In addition, even in a computer terminal device, a digital photo frame device, a car navigation device, and the like, as long as it is assumed that the brightness around the main body is different from that around the viewer, these are also referred to as “display device” according to the present invention. "include. In the following description, an example of a television device will be mainly described. However, in other display devices, a device that can achieve the object of the present invention can be realized by the same configuration. Although not included in the scope of the claims of the present invention, these devices may not necessarily use a remote control, but in this case, the device is viewed by something other than the remote control (for example, the viewer's body). A means for acquiring the background luminance around the person may be provided.

(Remote controller)
The remote control has a “remote control background luminance acquisition unit” 0221 for acquiring the remote control background luminance.

In this embodiment, “background luminance” refers to peripheral luminance that affects the luminance of the screen of a display device such as a television device. The background luminance is luminance that is considered to be adapted to the eyes of a user such as a viewer, and is affected by the viewing environment of the user. The “periphery” here is not limited to the periphery of the main body of a television device or the like, but includes the periphery of a viewer or the like. This is because the eyes of viewers and the like who are watching television adapt not only to the background brightness around the body of the television device or the like, but also to the background brightness around their own. This is because the brightness of the screen of a television device or the like can be adjusted appropriately only after acquiring and using the brightness.
Also, “remote control background luminance” refers to the background luminance around the remote control. The reason why the background brightness around the remote control is acquired as the background brightness around the user is that the remote control is very likely to exist at the user's hand during viewing of a television or the like.

As a configuration for the remote control to acquire the remote control background luminance, for example, an illuminance sensor is mounted on the remote control as a sensor for detecting the background luminance, and the illuminance around the remote control is measured by the sensor, and the result of the measurement A method of detecting the background luminance by converting the obtained illuminance into luminance is used. In this method, the illuminance measured using the illuminance sensor without using the luminance sensor is converted into the luminance for the following reason. That is, in general, “luminance” (unit: cd / m ² ) is an index indicating the brightness of the light emitter, whereas “illuminance” (unit: Lux) is the brightness illuminated by the light emitter. It is an indicator to show. Here, the brightness around the screen and the brightness around the user are the brightness of the room illuminated by the screen of the lighting device or the display device, which is a light emitter, so it is appropriate to measure the illuminance. However, in order to adjust the brightness of the screen using the brightness of the room, it is necessary to convert the measured illuminance into the brightness, which is the background brightness. For this reason, it is desirable that a rule for converting illuminance into luminance is held in the remote control. Alternatively, instead of performing this conversion on the remote control side, the obtained detection result of illuminance may be transmitted as it is to the main body side and converted to luminance on the transmission side. Conversion from illuminance to luminance is possible by using a known conversion formula. For example, according to Non-Patent Document 1 (Industry Development Organization Co., Ltd. “Light and Light Recording” http://www.hdcsj.com/hdc/index/led/Lights.htm), a conversion formula from illuminance to luminance Is expressed by the equation shown in (Expression 2) (page 7 of the same document).

(Equation 2)
B = K × E / π (B: luminance, K: reflection coefficient of object, E: illuminance)

Therefore, if the reflection coefficient of the object is known, the measured illuminance can be converted into luminance. For example, when the object is an object made of 18% reflective material, the illuminance 1 Lux is equal to the luminance 0.18 / πcd / m ^2. 28.6 cd / m ² . The illuminance detection result obtained as described above or the result obtained by converting the detection result into luminance is transmitted from the remote control to the display device body by the short-range wireless communication means or the like.

  Thus, since the sensor mounted on the remote controller measures the brightness of the room around the remote controller, it is desirable to be provided at a position suitable for this measurement. From this point of view, a configuration in which the sensor is provided on the operation surface of the remote control is considered as one configuration. This is because the remote control operation surface is usually placed on a tabletop or the like with the top facing up, or is held by the user and is not faced down. This is because the thickness can be measured. As another configuration, a configuration in which the sensor is provided on any of the four side surfaces of the remote control (all surfaces except the operation surface and the surface on the back side thereof) can be considered. This is also for the same reason as that provided for the operation surface. Note that the purpose of detecting the background brightness around the remote control is to detect the brightness adapted to the viewer's eyes more accurately. It can be said that it is most preferable that the surface is provided with a sensor. In this case, if the remote control is placed in a vertical position, the face that faces the user is usually faced down among the four side faces. In order to prevent this, the side surface of the remote controller may be curved. Thus, by making the surface on which the sensor of the remote controller is mounted into a curved surface, it is possible to increase the sensitivity of the sensor by using this as a lens.

  There is no particular limitation on the timing of detecting the background luminance using the sensor. Therefore, the background luminance may be continuously detected continuously from when the power source of the display device is turned on to when it is turned off. In this way, every time the background brightness around the screen or the remote control changes, it can be detected without leaking, so it can always be adjusted to an appropriate screen brightness corresponding to the background brightness. It becomes. However, since the battery capacity of the remote control is generally small, detection may be performed at the minimum necessary timing in order to save power consumption. As the timing of detection in such a case, for example, detection is performed only at the moment when the main body of the display device is turned on, or detection is performed at a predetermined interval (for example, every 10 minutes). Alternatively, the sensor may be linked to ON / OFF of the lighting switch on / off of the lighting device so that the sensor is detected each time it is turned ON / OFF. The sensor may detect the background brightness when detecting. The last example is a configuration in consideration of the high probability that the background brightness around the user changes when the user moves in addition to the high probability that the remote control is at the user's hand.

  The remote controller may be a camera-equipped mobile phone that is configured to detect background luminance using a camera mounted on the mobile phone. The remote control may be a solar cell type mobile phone. In this case, it is possible to estimate the brightness of the surroundings by measuring the amount of current generated by the solar cell, so the background luminance is detected to the extent that it is sufficient to determine the tendency of the adjustment value. It becomes possible.

(Main unit)
The main body includes a “screen background luminance acquisition unit” 0212 and a “screen luminance adjustment unit” 0213.
(Screen background brightness acquisition unit)
The screen background luminance acquisition unit is for acquiring the screen background luminance. “Screen background luminance” refers to the background luminance around the screen. As a specific configuration for the main body to acquire the screen background luminance, for example, an illuminance sensor is mounted on the main body as a sensor for detecting the background luminance, as described for the remote control background luminance. The background luminance may be detected by measuring the illuminance around the screen and converting the illuminance obtained as a result of the measurement into luminance.

Since the sensor mounted on the main body measures indoor brightness around the screen, it is desirable that the sensor be provided at a position suitable for this measurement. From such a viewpoint, as one configuration, a configuration in which the sensor is provided on the front surface, both side surfaces, or the upper surface of the main body can be considered. The reason for this is basically the same as that described for the mounting position of the sensor mounted on the remote controller, which is basically the surface facing the room. In addition, if the sensor is provided very close to the screen and facing the screen, the brightness of the screen will be picked up, and it will be difficult to accurately detect the background brightness around the screen. It is desirable to avoid the position.
The timing of detecting the background luminance using the sensor is not particularly limited, as is the case with the remote controller.

(Screen brightness adjustment section)
The “screen brightness adjusting unit” is for adjusting the screen brightness by using the acquired screen background brightness and the acquired remote control background brightness.
It is desirable that the screen brightness adjustment unit holds a rule for performing such adjustment.
FIG. 3 is a diagram illustrating an example of functional blocks of the display device according to the present embodiment, and illustrates an example in which the screen brightness adjustment unit includes a unit that holds a rule for performing such adjustment. In other words, as shown in the figure, the “screen brightness adjustment unit” 0313 includes a “rule holding unit” 0314. The rule holding unit is configured to hold a rule for associating the screen background luminance, the remote control background luminance, and an adjustment value for adjusting the luminance of the screen in accordance with the combination thereof.

(Specific examples of rules)
Here, a specific example of the rules held by the rule holding means will be described.
FIG. 4 is a diagram showing an example of the rules held by the rule holding means, and shows an example when the rules are defined by a table. Note that the rule is not necessarily determined by the table as described above, and may be determined by a function indicating the relationship between the screen background luminance / remote control background luminance and the adjustment value, for example.

  In the example of FIG. 4, the screen background brightness shown in (A1) is divided into two cases of “high” and “low”, and the remote control background brightness shown in (A2) is “high” and “low”. It is divided into two cases. As a result, there are four combinations of “high / high”, “low / low”, “high / low”, and “low / high” as combinations of screen background luminance and remote control background luminance. Here, the “combination tendency” is because it is not always necessary to set the exact values of the screen background luminance and the remote control background luminance in the rule. That is, as the screen background brightness and the remote control background brightness, the value of the background brightness based on the standard brightness of the room (referred to as “standard background brightness” for convenience) is set to an appropriate constant value in advance, and the detected screen background brightness, It is sufficient to achieve the object of the present invention if the rules are divided into two cases where the remote controller background luminance is higher and lower than the standard background luminance.

  In the example of FIG. 4, the tendency of the adjustment value of the screen brightness in each case is determined corresponding to the above-described four combinations of screen background brightness and remote control background brightness. As described above, in order to keep the minimum luminance contrast (C) that can be identified by the viewer constant, when the background luminance (Lb) changes in the higher direction, the luminance (Lo) of the visual target is increased, and the background luminance (Lo) When Lb) changes in the lower direction, the luminance (Lo) of the visual target may be lowered. Therefore, if it is determined that the minimum luminance contrast (C) is high, it is determined that even a slight difference in luminance can be identified even if the screen of a display device such as a television device is darkened. Adjustment is performed so as to decrease the luminance, and if it is determined that the minimum luminance contrast (C) is low, the adjustment is performed so as to increase the luminance of the screen of the display device. Specifically, the tendency of the adjustment value of the screen brightness corresponding to the tendency of the combination of the four screen background brightnesses and the remote control background brightness shown in the figure is as follows. That is, when the combination tendency of the screen background luminance and the remote control background luminance is “high and high”, the tendency of the adjustment value of the screen luminance is determined as “higher than average” as shown in the (B1) column, and “low” In the case of “high”, “slightly higher than average” is set as shown in the column (B2), and in the case of “high and low”, “slightly lower than average” is set as shown in the (B3) column. In the case of “low and low”, as shown in the column (B4), “low level than average” is set. Here, the “adjustment value tendency” is because it is not always necessary to set a strict value for the adjustment value of the screen luminance in the rule. Here, “average” is used as a reference for adjusting the screen brightness. In order to enable screen brightness adjustment based on such average, the screen brightness corresponding to the combination of the case where both the screen background brightness and the remote control background brightness are the above-mentioned standard background brightness is averaged. It may be determined as follows. In this way, for example, if the actually detected screen background brightness and the remote control background brightness are both higher than the brightness corresponding to the standard room brightness, the screen brightness is adjusted to a level higher than the average. As described above, it is possible to adjust an appropriate screen luminance level according to the background luminance.

  In the above description, the screen background brightness and the remote control background brightness have been described as being divided into two cases where the background brightness is higher and lower than the standard background brightness. However, the way of dividing is not limited to each of these two categories. One or both of the screen background luminance and the remote control background luminance may be three or more. For example, the screen background luminance and the remote control background luminance may be classified into three categories of high, middle, and low. In this case, there are nine patterns of adjustment values of the screen luminance corresponding to these combinations. There will be. In this case, the screen brightness can be adjusted in a more precise form than the four cases of the screen brightness adjustment value in the above example, but the exact value of the screen brightness adjustment value is not necessarily set. There is no change in the points that do not need to be defined.

(Hardware configuration)
(Hardware configuration of the main unit)
Next, the hardware configuration of the display device of this embodiment will be described. First, the hardware configuration of the main body will be described.
FIG. 5 is a schematic diagram showing an example of the hardware configuration of the main body of the display device of this embodiment. In the display device of this example, the screen background luminance acquisition unit of the main body includes “storage device (recording medium)” 0501, “main memory” 0502, “CPU” 0503, “I / O” 0504, and “sensor "0506". The screen brightness adjustment unit includes a “storage device (recording medium)”, a “main memory”, a “CPU”, and an “I / O”. The main body also includes a “screen” 0505 connected via an I / O.

  These are connected to each other via a data communication path such as “system bus” 0507, and perform transmission / reception and processing of information. The storage device stores various programs executed by the CPU. The main memory provides a work area which is a work area when the program is executed by the CPU. A plurality of memory addresses are assigned to the main memory and the storage device, respectively, and a program executed by the CPU performs processing by exchanging data with each other by specifying and accessing the memory address. It is possible. In this example, a screen background luminance acquisition program and a screen luminance adjustment program are stored in the storage device, and these programs are automatically read from the storage device when the power is turned on, for example, and reside in the main memory.

  Next, a hardware configuration related to each unit will be specifically described. First, a hardware configuration related to screen background luminance acquisition will be described. The screen background luminance acquisition program executes processing for acquiring screen background luminance. Specifically, for example, a sensor for detecting background luminance is mounted on the main body, and the background luminance around the screen provided in the main body is detected by the sensor. This detection can be performed using a known technique. Therefore, although detailed description is omitted here, for example, an illuminance sensor using a phototransistor or a photodiode (hereinafter referred to as “sensor”) is connected to the main body via the I / O, and the screen is displayed. The sensor detects the illuminance around the screen based on the detection instruction of the background luminance acquisition program. The detection result of the illuminance is converted into background luminance, and the background luminance obtained as a result of the conversion is temporarily stored in the main memory. Therefore, the storage device may hold a conversion rule from illuminance to luminance. In this case, the rule is read out to the main memory, and the screen background luminance acquisition program refers to this rule. The background luminance can be obtained from the detection result of the illuminance. A specific example of this rule is as described in the configuration of the remote control background luminance acquisition unit.

  Next, a hardware configuration related to the screen brightness adjustment unit will be described. The screen brightness adjustment program executes a process of adjusting the screen brightness based on the screen background brightness obtained by the above process and the remote control background brightness received from the remote controller. As a premise for this, the remote controller background luminance acquired by the remote controller is transmitted from the remote controller by short-range communication means or the like, and the main body receives this via the I / O and stores it in the main memory. In addition, the screen brightness adjustment program first reads the screen background brightness and the remote control background brightness stored in the main memory. Next, the screen brightness adjustment program adjusts the screen brightness using the screen background brightness and the remote control background brightness. For this reason, it is desirable that the main body holds a rule for obtaining an adjustment value from the screen background luminance and the remote control background luminance.

  FIG. 6 is a schematic diagram illustrating an example of the hardware configuration of the main body of the display device according to the present embodiment, and illustrates an example of the case where the main body of the display device holds such rules. The hardware configuration of the main body of this example is basically the same as that shown in FIG. 5, but in this example, “storage device” 0601 includes a screen according to the screen background luminance, the remote control background luminance, and a combination thereof. Is associated with an adjustment value for adjusting the brightness (abbreviated as “background brightness / adjustment value association rule” in the figure). The rule is read into the main memory, and the screen brightness adjustment program uses the screen background brightness and the remote control background brightness to obtain the adjustment value with reference to the rule, and the screen based on the adjustment value. Adjust the brightness. Adjustment of the screen based on the adjustment value may be performed using a known technique.

(Remote control hardware configuration)
Next, the hardware configuration of the remote controller will be described.
FIG. 7 is a schematic diagram illustrating an example of a hardware configuration of a remote controller in the display device of the present embodiment. The remote control background luminance acquisition unit of the remote control of this example includes “storage device (recording medium)” 0701, “main memory” 0702, “CPU” 0703, “I / O” 0704, and “sensor” 0705. Composed.

  Next, a hardware configuration related to remote control background luminance acquisition will be described. The remote control background luminance acquisition program executes processing for acquiring the remote control background luminance. Specifically, for example, an illuminance sensor is mounted on the remote controller, the illuminance around the remote controller is detected by the sensor, and this is converted into luminance to obtain the background luminance. The specific configuration for this is the same as the configuration described for obtaining the screen background luminance.

<Effect>
According to the invention of the present embodiment, the brightness of the screen (luminance) can be obtained by using more accurate background luminance including not only the background luminance around the display device body including the screen but also the background luminance around the user of the display device. ) Can be appropriately adjusted. It is possible to provide a display device.

<Overview>
The display device according to the present embodiment is basically the same as the device according to the first embodiment, but the color temperature is used instead of the luminance according to the first embodiment as a value to be processed. It is an object of the present invention to provide a display device capable of appropriately adjusting brightness (color temperature). That is, the display device according to the present embodiment includes a main body and a remote controller. The remote controller has means for acquiring the color temperature around the remote controller, and the main body has means for acquiring the color temperature around the screen. The display device has means for adjusting the color temperature of the screen using the acquired color temperature around the screen and the color temperature around the remote control.

<Configuration>
(Display devices in general)
FIG. 8 is a diagram illustrating an example of functional blocks of the display device according to the present embodiment. As shown in the figure, the “display device” 0800 of this embodiment includes a “main body” 0810 having a “screen” 0811 and a “remote control” 0820 for controlling the main body.
The type of “display device” is not limited, and is similar to the display device of the first embodiment in that it includes a wide range of devices having a display screen (display) for displaying an image.

(Remote controller)
The remote control includes a “remote control color temperature acquisition unit” 0821 for acquiring the remote control color temperature.

  In the present embodiment, “color temperature” refers to a color value representing the color of light emitted from an object. More specifically, the color of light to be expressed corresponds to the color of light emitted from a black body at a certain temperature, and the temperature of the black body at that time is used as the color temperature. The user's eyes such as viewers have adapted to this color temperature, and the color temperature is affected by the viewing environment of the user. The color temperature varies depending on the type of light emitted from the object. For example, the light bulb color fluorescent lamp is 3000K (Kelvin), the day white fluorescent lamp is 5000K, the daylight fluorescent lamp is 6500K, the sunlight is 5500K, and the studio light is 3200K. Etc. are known. The color temperature standard for Japanese television (NTSC-J) is 9300K. This color temperature is important for the accurate reproduction of the color.When the color temperature is higher than the standard, it feels paler than the actual color, and conversely, when the color temperature is lower than the standard, it is more yellow than the actual color. It feels like a tasty color.

“Remote control color temperature” refers to the color temperature around the remote control. The reason why the color temperature around the remote controller is acquired as the color temperature around the user is the same as that described for the brightness around the remote controller.

  As a configuration for the remote controller to acquire the remote controller color temperature, for example, a color temperature sensor may be mounted on the remote controller and the color temperature around the remote controller may be measured by the sensor. This color temperature sensor may also serve as an illuminance sensor for detecting background luminance.

(Main unit)
The main body includes a “screen color temperature acquisition unit” 0812 and a “screen color temperature adjustment unit” 0813.

(Screen color temperature acquisition unit)
The screen color temperature acquisition unit is for acquiring the screen color temperature. “Screen color temperature” refers to the color temperature around the screen. As a configuration for the main body to acquire the screen color temperature, for example, a color temperature sensor may be mounted on the main body, and the color temperature around the screen provided by the sensor may be detected. A specific configuration for that purpose may be the same as that described above for the remote controller color temperature.

(Screen color temperature adjustment unit)
The “screen color temperature adjustment unit” is for adjusting the color temperature of the screen using the acquired screen color temperature and the acquired remote controller color temperature.
It is desirable that the screen color temperature adjustment unit holds a rule for performing such adjustment.
FIG. 9 is a diagram illustrating an example of functional blocks of the display device according to the present embodiment, and illustrates an example in which the screen color temperature adjustment unit includes a unit that holds a rule for performing such adjustment. In other words, as shown in the figure, the “screen color temperature adjustment unit” 0913 includes a “second rule holding unit” 0914. The second rule holding means is configured to hold a rule for associating the screen color temperature, the remote controller color temperature, and an adjustment value for adjusting the screen color temperature in accordance with the combination thereof.

(Specific examples of rules)
Here, a specific example of the rules held by the second rule holding means will be described.
FIG. 10 shows an example of a rule held by the second rule holding unit, and shows an example where the rule is defined by a table. Note that the rule is not necessarily determined by the table as described above, and may be determined by a function indicating the relationship between the screen color temperature / remote control color temperature and the adjustment value, for example.

  In the example of FIG. 10, the screen color temperature shown in (A1) is divided into two cases of “high” and “low”, and the remote controller color temperature shown in (A2) is two of “high” and “low”. It is divided into two cases. As a result, there are four combinations of “high / high”, “low / low”, “high / low”, and “low / high” as combinations of screen color temperature and remote controller color temperature. The reason for the “combination tendency” here is the same as in the case of background luminance. That is, as the screen color temperature and the remote controller color temperature, the color temperature based on the standard brightness of the room (referred to as “standard color temperature” for convenience) is determined in advance, and the detected screen color temperature and remote controller color temperature are the same. It is sufficient to achieve the object of the present invention if the rules are divided into two cases of higher and lower than the standard color temperature.

  Further, in the example of FIG. 10, the tendency of the adjustment value of the screen color temperature in each case is determined corresponding to the combination tendency of the four screen color temperatures and the remote controller color temperature described above. Specifically, when the combination tendency of the screen color temperature and the remote controller color temperature is “high and high”, the tendency of the adjustment value of the screen color temperature is defined as “lower than average” as shown in the (B1) column. In the case of “low / high”, the level is set to “slightly lower than average” as shown in column (B2), and in the case of “high / low”, “slightly higher than average” is set as shown in column (B3). In the case of “low level”, it is determined as “higher than average” as shown in the column (B4). Here, the reason for “adjustment value tendency” is the same as in the case of the adjustment value of the screen brightness. Here, the “average” is used as a reference for adjusting the screen color temperature. In order to enable the screen color temperature adjustment based on such average, the screen color temperature corresponding to the combination in which both the screen color temperature and the remote control color temperature are the standard color temperatures described above is set. It may be determined as an average value. In this way, for example, if the detected screen color temperature and the remote control color temperature are both higher than the color temperature corresponding to the standard room brightness, the screen color temperature is adjusted to a level lower than the average. As described above, an appropriate screen color temperature level can be adjusted according to the color temperature.

  Note that the method of dividing the screen color temperature and the remote control color temperature is not limited to the case where the screen color temperature and the remote control color temperature are divided into two cases, that is, the case where the screen color temperature is higher than the standard color temperature and the case where the remote control color temperature is lower. The point that one or both of them may be three or more is the same as that described for the background luminance.

(Hardware configuration)
(Hardware configuration of the main unit)
Next, the hardware configuration of the display device of this embodiment will be described. First, the hardware configuration of the main body will be described.
FIG. 11 is a schematic diagram showing an example of the hardware configuration of the main body in the display device of this embodiment. In the display device of this example, the screen color temperature acquisition unit of the main body includes “storage device (recording medium)” 1101, “main memory” 1102, “CPU” 1103, “I / O” 1104, and “sensor 1106. The screen color temperature adjustment unit includes a “storage device (recording medium)”, a “main memory”, a “CPU”, and an “I / O”. The main body also includes a “screen” 1105 connected via an I / O.

  These are connected to each other via a data communication path such as a “system bus” 1107 to transmit / receive information and process information. The storage device stores various programs executed by the CPU. The main memory provides a work area which is a work area when the program is executed by the CPU. A plurality of memory addresses are assigned to the main memory and the storage device, respectively, and a program executed by the CPU performs processing by exchanging data with each other by specifying and accessing the memory address. It is possible. In this example, a screen color temperature acquisition program and a screen color temperature adjustment program are stored in the storage device, and these programs are automatically read from the storage device when the power is turned on, for example, and reside in the main memory.

  Next, a hardware configuration related to each unit will be specifically described. First, a hardware configuration related to screen color temperature acquisition will be described. The screen color temperature acquisition program executes processing for acquiring the screen color temperature. Specifically, for example, a color temperature sensor is mounted on the main body, and the color temperature around the screen provided in the main body is measured by the sensor. This measurement may be performed using a known technique. The detected color temperature is temporarily stored in the main memory.

  Next, a hardware configuration related to the screen color temperature adjustment unit will be described. The screen color temperature adjustment program executes processing for adjusting the screen color temperature based on the screen color temperature obtained by the above-described processing and the remote control color temperature received from the remote control. As a premise for this, the remote controller color temperature acquired by the remote controller is transmitted from the remote controller by short-range communication means or the like, and the main body receives this via the I / O and stores it in the main memory. Then, the screen color temperature adjustment program first reads the screen color temperature and the remote control color temperature stored in the main memory. Next, the screen color temperature adjustment program adjusts the screen brightness by using the screen color temperature and the remote control color temperature. Therefore, it is desirable that the main body holds a rule for obtaining an adjustment value from the screen color temperature and the remote control color temperature.

  FIG. 12 is a schematic diagram illustrating an example of the hardware configuration of the main body of the display device according to the present embodiment, and illustrates an example when the main body of the display device holds such rules. The hardware configuration of the main body of this example is basically the same as that shown in FIG. 11, but in this example, the “storage device” 1201 has a screen according to the screen color temperature, the remote control color temperature, and a combination thereof. Is associated with an adjustment value for adjusting the brightness of the image (abbreviated as “color temperature / adjustment value association rule” in the figure). The rule is read into the main memory, and the screen color temperature adjustment program uses the screen color temperature and the remote control color temperature to obtain an adjustment value by referring to the rule, and based on the adjustment value. Adjust the color temperature of the screen. Adjustment of the screen based on the adjustment value may be performed using a known technique.

Next, the hardware configuration of the remote controller will be described.
FIG. 13 is a schematic diagram illustrating an example of a hardware configuration of a remote controller in the display device of the present embodiment. The remote controller color temperature acquisition unit of the remote controller of this example includes “storage device (recording medium)” 1301, “main memory” 1302, “CPU” 1303, “I / O” 1304, and “sensor” 1305. Composed.

(Remote control hardware configuration)
Next, a hardware configuration related to remote controller color temperature acquisition will be described. The remote control color temperature acquisition program executes processing for acquiring the remote control color temperature. Specifically, for example, a color temperature sensor is mounted on the remote controller, and the color temperature around the remote controller is detected and acquired by the sensor. The specific configuration for this is the same as the configuration described for obtaining the screen color temperature.

<Effect>
According to the invention of the present embodiment, the brightness (color temperature) of the screen can be appropriately adjusted by using the color temperature around the display device body including the screen and the color temperature around the user of the display device. It is possible to provide a display device that can be used.

Claims (3)

A display device comprising a main body with a screen and a remote control for controlling the main body,
The remote control
A remote control background luminance acquisition unit for acquiring a remote control background luminance that is a background luminance around the remote control;
The body is
A screen background luminance acquisition unit for acquiring a screen background luminance which is a background luminance around the screen;
A screen brightness adjustment unit for adjusting the screen brightness using the acquired screen background brightness and the acquired remote control background brightness;
A display device. The screen brightness adjustment section
Rule holding means for holding a rule for associating the screen background luminance, the remote control background luminance, and an adjustment value for adjusting the screen luminance according to a combination thereof;
The display device according to claim 1, wherein the rule is set to perform the adjustment as follows.
Trend of screen background brightness and remote control background brightness: Trend of adjustment value of screen brightness High High: Higher than average Low Low: Lower than average High Low: Slightly lower than average Low High: Slightly higher than average The display device according to claim 1 or 2,
A display device in which color temperature is used instead of luminance that is a value to be processed.

Images