JP2000194337A - Display device and temperature control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the temperature inside the device from rising by controlling the luminance value of a light emitting element which raises the temperature in the device by using temperature information in the device. SOLUTION: This device is provided with a temperature obtaining means 10 which obtains temperature data in a large picture display device 1, a storage means 11 which stores the data obtained, a light emitting controlling means 13 which controls the luminance value of a light emitting element 14 based on the computed results of a control/computation processing section 12 by using the data read from the means 11, and a light emitting means 5 which drives the element 14 by the controlled luminance value. By controlling the light emitting luminance of the element 14 based on the temperature in the device 1, the temperature inside the device 1 is kept within an appropriate temperature range.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for controlling the internal temperature, and more particularly to a display device for controlling the luminance of a light emitting element so that the temperature inside the display device does not fall outside an appropriate temperature range.

[0002]

2. Description of the Related Art A light emitting element of a display device generates more heat as it emits light of higher luminance. Therefore, the higher the brightness of the image is displayed, the higher the temperature inside the device becomes. If the internal temperature of the device exceeds the operating temperature of each component, the normal operation of each component cannot be guaranteed. Therefore, it is necessary to maintain the internal temperature of the device appropriately. Therefore, conventionally, as a means for cooling or controlling the inside of the display device, a fan for discharging the air inside the display device to the outside has been used to adjust the heated temperature in the display device.

[0003]

However, in the above-mentioned conventional display device, the temperature inside the device changes depending on the brightness of the displayed screen. For example, when the displayed image has a high brightness close to white in its entirety, The temperature inside the device becomes high, it is difficult to maintain the temperature inside the device properly only with the air discharge fan, and the temperature inside the device exceeds the operating temperature at which the parts constituting the display panel operate properly. was there.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and uses the temperature information inside the display device to determine the luminance value of the light emitting element, which is one of the factors that increase the temperature inside the display device. An object of the present invention is to provide an excellent display device which automatically controls and prevents a temperature rise inside the display device.

Another object of the present invention is to provide an excellent display device capable of multiplexing and transmitting temperature information of the device to another information transmission line such as luminance control information. Another object of the present invention is to provide an excellent display device capable of acquiring temperatures at respective positions of the display device and appropriately expressing temperature information inside the display device by a temperature distribution over the entire device. .

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a temperature obtaining means for obtaining temperature information inside a display device, and a brightness value for a light emitting element based on the temperature information obtained by the temperature obtaining means. And a light-emitting means for causing the light-emitting element to emit light according to the controlled luminance value, so that the light-emitting luminance of the light-emitting element is controlled based on the temperature in the display device.

According to the present invention, the temperature in the display device, which cannot be controlled only by the exhaust fan, is increased by acquiring the temperature in the display device and controlling the light emission luminance of the light emitting element based on the temperature. By controlling the high luminance of the light emitting element that causes the luminance and automatically lowering the luminance, a display device can be obtained in which the temperature in the display device can be controlled so as not to become higher than the appropriate temperature range.

According to the present invention, in order to solve the above-mentioned problem, a temperature acquisition unit is provided in a display panel, and temperature information from the temperature acquisition unit is stored in a controller unit for controlling light emission of a light emitting element. Using another transmission path already installed between the display panel and the controller as a transmission path for transmitting to the means, multiplexing and transmitting the acquired temperature information to the storage means, and multiplexing and transmitting to the storage means. The brightness value of the light emitting element is controlled based on the stored temperature information.

According to the present invention, the temperature obtaining means is provided in the display panel, and the temperature information obtained by the temperature obtaining means is multiplexed and transmitted on a transmission line for transmitting other information such as luminance control information. Without installing a special transmission line,
A display device that can simplify management and reduce costs can be obtained.

In order to solve the above-mentioned problems, the present invention provides a plurality of temperature acquisition means provided in a plurality of display panels each having a light emitting element for acquiring temperature information, and displaying the acquired temperature information on the display panel. A storage unit for storing as temperature distribution information of each position corresponding to each position of the panel; and a light emission control unit for controlling a luminance value for the light emitting element based on the temperature distribution information read from the storage unit. The light emitting element emits light according to the luminance value of the light emitting element controlled according to the temperature based on the temperature distribution information.

According to the present invention, a plurality of display panels are provided at various places or in the whole area of a display device, temperature distribution information corresponding to each position of the display device is obtained from a plurality of pieces of temperature information, and a light emitting element is provided based on the temperature distribution information. By controlling the light emission luminance of the display device, it is possible to obtain a display device capable of controlling the luminance value with optimal temperature information for the entire screen.

[0012]

According to the first aspect of the present invention, a temperature acquiring means for acquiring temperature information of an apparatus, and luminance information for a light emitting element are controlled based on the temperature information acquired by the temperature acquiring means. A light emission control means is provided to emit light from the light emitting element according to luminance information controlled according to the temperature of the device, thereby controlling the high luminance of the light emitting element, which causes a rise in temperature that could not be controlled by the exhaust fan alone. Then, by automatically lowering the luminance, it is possible to control that the temperature in the display device does not become higher than the appropriate temperature range.

According to a second aspect of the present invention, there is provided a temperature obtaining means for obtaining temperature information of the apparatus, a storage means for storing the temperature information obtained by the temperature obtaining means, and a storage means for storing the temperature information. Light emission control means for controlling luminance information for the light emitting element based on the temperature information, so that the light emitting element emits light according to the luminance information controlled according to the temperature of the device, and cannot be controlled only by the exhaust fan. By controlling the high luminance of the light emitting element, which causes the temperature to increase, and automatically lowering the luminance, it is possible to control the temperature in the display device so as not to be higher than the appropriate temperature range.

According to a third aspect of the present invention, there are provided a plurality of temperature obtaining means provided around a light emitting element for obtaining temperature information at each installation position, and position information output from the plurality of temperature obtaining means. Storage means for storing temperature information as temperature distribution information of the display device based on each installation position of the temperature acquisition means; and light emission for controlling a luminance value for the light emitting element based on the temperature distribution information read from the storage means. Control means for causing the light-emitting element to emit light by a luminance value for the light-emitting element controlled according to the temperature based on the temperature distribution information of the display device. The temperature distribution information at each position of the display device is obtained from the temperature information, and the light emission luminance of the light emitting element is controlled based on the temperature distribution information. By has the effect of being able to control the brightness value at the optimal temperature information as the entire screen.

According to a fourth aspect of the present invention, there are provided a plurality of temperature obtaining means provided in a plurality of display panels each having a light emitting element for obtaining temperature information at each installation position, and the plurality of temperature obtaining means. Storage means for storing the temperature information output from the means as temperature distribution information on the display panel of the display device corresponding to each installation position of the display panel,
Light emission control means for controlling a luminance value for the light emitting element based on the temperature distribution information read from the storage means, wherein the light emission is performed based on the luminance value for the light emitting element controlled according to the temperature based on the temperature distribution information of the display device. The device emits light, and obtains temperature distribution information from a plurality of pieces of temperature information obtained from a plurality of display panels provided at various places or in the entire area of the display device, and based on the temperature distribution information, obtains the temperature distribution information of the light emitting element. By controlling the light emission luminance, there is an effect that the luminance value can be controlled with optimum temperature information for the entire screen based on the temperature information obtained from the local area.

According to a fifth aspect of the present invention, the temperature acquisition means is located around the light-emitting element, and a signal for transmitting the temperature information acquired by the temperature acquisition means; By multiplexing a signal for transmitting luminance information to the light emitting element using the same transmission path, a plurality of pieces of temperature information obtained from a plurality of display panels provided at various locations on the display device or over the entire area can be obtained. By multiplexing and transmitting the control information and other information on the transmission path, the management can be simplified and the cost can be reduced without installing a special transmission path.

According to a sixth aspect of the present invention, the temperature information of the device is obtained, and it is determined whether the obtained temperature information is within an appropriate temperature range. Without controlling, if the temperature information is higher than the appropriate temperature range, lower the brightness value of the light emitting element, if the temperature information is lower than the appropriate temperature range, control to increase the brightness value of the light emitting element,
The method comprises the steps of causing the light emitting element to emit light by the controlled luminance value, and controls the high luminance of the light emitting element which causes the temperature inside the display device to be increased which could not be controlled only by the exhaust fan. Thus, by automatically lowering the luminance, it is possible to control that the temperature in the display device does not become higher than the appropriate temperature range.

According to a seventh aspect of the present invention, the temperature information inside the display device is obtained, the obtained temperature information is stored in a storage means, and the plurality of temperature information stored in the storage means are stored. It is determined whether or not the temperature calculation result based on the temperature is within the appropriate temperature range.If the temperature calculation result is higher than the appropriate temperature range, the brightness value of the light emitting element is reduced. If the temperature calculation result is lower than the appropriate temperature range, control is performed so as to increase the luminance value of the light emitting element, and each step of causing the light emitting element to emit light according to the controlled luminance value is performed. By controlling the high brightness of the light emitting element which causes the temperature inside the display device to be increased which could not be controlled by the control, and automatically lowering the brightness, the temperature inside the display device does not become higher than the appropriate temperature range. An effect that can be controlled to.

In the invention according to claim 8 of the present invention, the step of acquiring the temperature information of the device acquires the temperature information from a plurality of locations of the device, and stores the acquired temperature information in the storage means. In the step, the temperature information and the position information are stored as temperature distribution information corresponding to each of a plurality of locations where the temperature information is obtained, and it is determined whether the temperature is within an appropriate temperature range based on the temperature information read from the storage unit. The step is for judging whether or not the temperature is within an appropriate temperature range based on the temperature distribution information read from the storage means, and controlling a luminance value for causing the light emitting element to emit light in accordance with the result of the judgment. By acquiring temperature distribution information at each position of the display device from a plurality of pieces of temperature information obtained from, and controlling the light emission luminance of the light emitting element based on the temperature distribution information, the screen An effect that it is possible to control the luminance value at the optimal temperature information as the body.

According to a ninth aspect of the present invention, the step of obtaining the temperature information of the apparatus includes the steps of obtaining temperature information from a display panel of the apparatus, and storing the temperature information in storage means. The position information and the temperature information of the display panel are stored as the temperature distribution information corresponding to the position of the display panel, and a plurality of information obtained from a plurality of display panels provided at various places or in the whole area of the display device. By obtaining temperature distribution information from the temperature information and determining whether or not the temperature in the display device is within an appropriate temperature range based on the temperature distribution information, the temperature information obtained from the local area makes it possible to optimize the entire screen. This has the effect that the brightness value can be controlled by the temperature information.

According to a tenth aspect of the present invention, there is provided the temperature information obtained in the step of obtaining temperature information of the apparatus,
The method includes a step of multiplexing and transmitting the luminance value in the step of causing the light emitting element to emit light by the controlled luminance value, and obtained from a plurality of display panels provided at various parts or the entire area of the display device. Multiple temperature information is multiplexed and transmitted on a transmission line for transmitting other information such as brightness control information, so that management can be simplified and cost can be reduced without installing a special transmission line. Has the effect of being able to.

Hereinafter, based on the attached drawings and FIGS.
An embodiment of the present invention will be described in detail. (Embodiment 1) First, a large-sized image display device according to Embodiment 1 of the present invention will be described with reference to FIGS. FIG. 1 is a block diagram showing the configuration of the large-sized video display device according to the first embodiment of the present invention, and FIG. 2 is a flowchart showing an example of the operation of the large-sized video display device shown in FIG. In FIG. 1, 1 is a large image display device, 7 is a display panel, 8 is a controller unit, 10 is a temperature acquisition unit, 11
Denotes a storage unit, 12 denotes a control / arithmetic processing unit, 13 denotes a light emission control unit, 14 denotes a light emitting element, and 15 denotes a light emitting unit.

Next, with reference to FIG. 1, the configuration of the large-size image display device according to the first embodiment of the present invention will be described in more detail. In the large-sized image display device 1 shown in FIG. 1, the temperature acquiring means 10 acquires the temperature in the large-sized image display device and outputs temperature information, and the storage means 11 stores the inputted temperature information as temperature data, The arithmetic processing unit 12 controls writing / reading of data to / from the storage means 11 and also calculates a difference between an average value of the temperature in the apparatus within a unit time obtained from the temperature data stored in the storage means 11 and a preset appropriate temperature value. The light emission control means 13 outputs data for increasing or decreasing the luminance value according to
The luminance value of the light emitting means 15 is controlled in accordance with gradation data of an image (not shown) based on data for increasing or decreasing the luminance value output from the light emitting section. The light emitting means 15 emits light based on the luminance value controlled by the light emission control means 13. The light emitting element 14 is a light emitting element which is disposed at a position in the display panel 7 and emits light under the control of the light emitting means 15. The display panel 7 is formed by the light emitting element 14 and the light emitting means 15.
And the controller unit 8 is constituted by the storage unit 11, the control / arithmetic processing unit 12, and the light emission control unit 13. Each display panel 7 includes a plurality of light emitting elements 14.

Next, the operation of the large-size image display device according to the first embodiment of the present invention will be described with reference to FIG. FIG.
5 is a flowchart illustrating a brightness control unit that performs brightness control of the light emitting element using the acquired temperature information. Now, the large-sized image display device 1 is in an operating state, and the individual light-emitting elements 14 emit light under the control of the light-emission control means 13 according to the gradation data of an image (not shown), and an image is displayed on the display panel 7. State. The luminance control process of the light emitting element 14 based on the gradation data of the image data is performed, for example, by setting the maximum luminance value obtained by the data for increasing or decreasing the luminance value to a luminance value having a ratio according to the gradation data.
Here, the description is omitted.

In such a state, first, the brightness control means is started, and the temperature in the large-sized image display device 1 is obtained by the temperature obtaining means 10 (step S3).
1) The storage means 1 stores the acquired temperature information as temperature data.
0 (step S32). Control / arithmetic processing unit 1
2 reads the temperature data from the storage means 10 and calculates the average temperature per unit time (step S33). Then, the average temperature is compared with an appropriate temperature range previously set as new temperature data, and according to the result, if the temperature data is within the appropriate temperature range, the luminance value is not changed and step S38 is performed.
To step S3 if the temperature data is out of the appropriate temperature range.
Go to step 5 (step S34).

In step S35, the light emission control means 1
Step 3 is a step S3 if the temperature data is lower than the appropriate temperature range.
The process proceeds to step S7, where the light emission control means 13 sets the maximum luminance value higher than the current maximum luminance value, and proceeds to step S38. In step S35, if the temperature data is higher than the appropriate temperature range, the light emission control means 13 proceeds to step S36. The light emission control means 13 lowers the maximum luminance value from the current maximum luminance value, and proceeds to step S38. The light emitting means 15 acquires the luminance value set by the light emission control means 13, emits light from the light emitting element 14 according to the luminance value (step S38), and returns to the temperature acquisition in step S31.

In the first embodiment, as described above, instead of cooling the temperature in the large-sized image display device, the brightness of the light-emitting element which causes the increase in the temperature which could not be controlled by the exhaust fan or the like is controlled. Accordingly, control can be performed so that the temperature in the large-sized image display device does not become higher than the appropriate temperature range.

(Embodiment 2) Next, referring to FIG.
A large-sized image display device according to Embodiment 2 of the present invention will be described. In the large image display device 2 shown in FIG.
Reference numeral 10 denotes a temperature acquisition unit that is attached to the display panel 9 and acquires the temperature therefrom and outputs the temperature information to the storage unit 11. Reference numeral 16 denotes a storage unit that multiplexes the transmission of the luminance control information to the light emitting unit 15 and stores the temperature information. 11 is a transmission path as a transmission means for transmitting to the transmission line 11. Further, the temperature acquisition unit 10, the light emitting element 14, and the light emission unit 15 are configured in the display panel 9. The other components are the same as those of the large-sized image display device 1 according to the first embodiment of the present invention, and thus the description will not be repeated.

Next, with reference to FIG. 3, the operation of the large-sized image display device according to the second embodiment of the present invention will be described. Now, it is assumed that the large-sized image display device 2 is in an operating state, the light-emitting means 15 is controlled by other means, the individual light-emitting elements 14 emit light, and an image is displayed on the display panel 9. . Therefore, temperature data inside the large-sized video display device 2 is obtained by the temperature obtaining means 10. The acquired temperature data is multiplexed and stored such that the time for transmitting the luminance value and the time for transmitting the temperature data to the transmission path 16 used for transmitting the luminance value from the controller unit 8 to the display panel 9 are separated. Transmitted to the means 11. In addition, since the operation of the large-sized video display device 2 according to the second embodiment is the same as that described in the first embodiment, the description is omitted.

In the second embodiment, the temperature acquisition means 10 is provided in the display panel 9 and the acquired temperature data is transmitted to the storage means 11 as described above. By using the existing transmission line 16 used for transmitting the luminance value and multiplexing the acquired temperature data to, for example, the luminance value described above and transmitting the multiplexed temperature data, another transmission line is not newly installed. To
Cost reduction can be achieved by reducing the number of transmission lines.

(Embodiment 3) Next, referring to FIG.
A large-size video display device according to Embodiment 3 of the present invention will be described. In the large image display device 3 shown in FIG.
Reference numeral 17 denotes a display panel having the same components as the display panel 9 shown in the second embodiment, but a plurality of display panels are provided in one large-sized video display device 3. Therefore, the large-sized image display device 3 has a structure in which a plurality of display panels 17 are provided, and the temperature acquisition means 10 is attached to each of the display panels 17.
The other components are the same as those of the large-sized image display device 2 according to the second embodiment of the present invention, and thus the description thereof will not be repeated.

Next, the operation of the large-sized image display device according to the third embodiment of the present invention will be described with reference to FIG. Now, the large image display device 3 is in the operating state, the light emitting means 15 is controlled by other means, the individual light emitting elements 14 emit light, respectively, and the image is displayed on the display panel 17. I do. Therefore, a plurality of display panels 1
The temperature data at each position inside the large-sized image display device 3 is obtained by each temperature obtaining means 10 provided in 7. The acquired temperature data, together with the position information, is multiplexed on the transmission path 16 used for transmitting the luminance value from the controller unit 8 to the display panel 9 and transmitted to the storage unit 11 for storage. The control / arithmetic processing unit 12 of the controller unit 8 uses the temperature data and the position information read from the storage unit 11 to calculate the temperature distribution of the large-sized video display device 3 and to control the luminance value obtained from the temperature distribution. Is output to the light emission control means 13. Here, for example, the ratio of the display panel 17 in which the temperature distribution is out of the preset temperature range is calculated, and the data for controlling the luminance value is such that the calculation result of the temperature distribution increases or decreases the luminance value in accordance with the preset ratio. It is assumed that the value to be reduced is calculated. In addition, since the operation of the large-sized video display device 3 according to the third embodiment is the same as that described in the second embodiment, the description is omitted.

In the third embodiment, as described above, the plurality of display panels 17 are provided at various locations or in the entire area of the large-sized video display device 3.
By providing a plurality of pieces of temperature information, a portion outside the temperature range is distant from the display panel provided with the temperature acquisition unit, as in the case of only the temperature data obtained from the local area. It is possible to control the brightness value so that the temperature becomes appropriate without being controlled so that the brightness decreases because of the position. FIG.
When the display panels 17 are arranged so as to be arranged at equal intervals as shown on the screen of the large-sized image display device 3, the position of the screen of the large-sized image display device 3 can be indicated by the position of the display panel. It is efficient. In the first, second, and third embodiments, the appropriate temperature range may be the operating temperature range of the components constituting the large-sized video display device, or may be within the operating temperature range of the components with some margin. If is a normal temperature, the lower limit need not be set as the range, and may be a range according to the installation state. In Embodiments 1, 2, and 3,
The value of the data for increasing or decreasing the luminance may be increased as the temperature becomes closer to the outside of the appropriate temperature range without being out of the appropriate temperature range. In this case, the temperature is controlled in a direction of lowering or increasing the temperature closer to the outside of the appropriate temperature range. be able to. In addition,
In the first, second, and third embodiments, when the temperature falls outside the appropriate temperature range and the brightness is controlled and then enters the appropriate temperature range, the brightness before the temperature falls outside the appropriate temperature range may be restored. When the camera returns to the appropriate temperature range, a bright and easy-to-view image can be displayed. Further, when the temperature falls below the set temperature lower than the upper limit of the appropriate temperature range, the brightness may be returned to the brightness before the temperature falls outside the appropriate temperature range. In this case, it is possible to make it difficult for the temperature to fall outside the appropriate temperature range again. In the first, second, and third embodiments, an air exhaust fan may be used in combination. In this case, the exhaust capacity of the air exhaust fan can be reduced to reduce the size and power consumption of the air exhaust fan. Further, the exhaust capacity of the air exhaust fan may be controlled using the data for increasing or decreasing the luminance, and may be decreased when the temperature is high. Further, the appropriate temperature range may be different depending on the installation position of the air exhaust fan. In this case, the brightness can be controlled according to the temperature at the position where the temperature is likely to change and at the position where the temperature is not easily changed. Embodiment 1 and Embodiment 2
In Embodiment 3, even in a display device that is not large-sized and display information is not video, by controlling luminance as in Embodiment 1, the temperature in the display device is controlled to be within an appropriate temperature range. However, especially in the case of a large size, a high-brightness light emitting element is used so that the display contents can be easily seen even in a place far from the display device, so that the temperature tends to be high, so that the effect is high, and the display information is high. In the case of a video, if the gradation data of the video, which is the display information, is not a value close to the maximum value, the light emission luminance is not reduced.If the temperature near the maximum value increases continuously, the light emission luminance may be reduced. it can. Embodiment 1, Embodiment 2 and Embodiment 3
, Control without storing the acquired past temperature information
Data for increasing or decreasing the luminance may be calculated by directly inputting the data to the calculation processing unit. In this case, it is not necessary to provide a storage unit.
Further, using the past temperature data stored in the storage unit, the data for increasing or decreasing the luminance when there is a rapid temperature change may be set to a large value, and in this case, the luminance is controlled so as to be in the appropriate temperature range sooner. be able to. Furthermore, the temperature change due to the time of day or season may be stored or set and predicted, and the brightness may be controlled by data that increases or decreases the brightness according to the predicted temperature before the temperature reaches the optimum temperature range. The luminance can be controlled so as not to fall outside the range.
In the first, second, and third embodiments, the calculation of the data for increasing / decreasing the brightness may use not only the average value of the temperature data but also the maximum value or the minimum value. Control can be performed by setting the range according to the calculation. Further, even when there are a plurality of temperature acquisition means, the temperature distribution is associated with the average value, the maximum value, the minimum value or the position information as in the third embodiment by using the plurality of temperature data obtained from the plurality of temperature acquisition means. Data for increasing or decreasing the luminance may be calculated at a ratio of temperature data that exceeds the appropriate temperature range. In this case, too, control can be performed by setting the set range of the appropriate temperature range to a range corresponding to the calculation. In addition, Embodiment 1,
In Embodiments 2 and 3, although the installation position of the temperature acquisition unit is not particularly defined, the appropriate temperature range set by the control / arithmetic processing unit may be set according to the temperature data output from the temperature acquisition unit. If the position is close to the light emitting element having a high temperature, temperature information in the device can be obtained more accurately. Further, the installation position of the temperature acquisition unit may be outside the display device, but the temperature acquisition unit may be directly heated by sunlight or the like, and the temperature of the display device may not be correctly obtained. It is desirable that the inside of the shield that prevents the temperature of the temperature acquisition unit from rising due to the external action is also included in the display device, and the temperature acquisition unit is provided at least in the display device. In the first, second, and third embodiments, the temperature acquisition unit can be realized using a temperature sensor. Further, the temperature acquisition means may output binary information indicating whether the temperature exceeds or does not exceed the set temperature. In this case, the control / brightness calculation unit performs an operation in accordance with the output temperature data, thereby obtaining the temperature data. It is possible to simplify the transmission or downsize the temperature acquisition means.

The first embodiment of the present invention described above,
The large-sized image display device and the temperature control method thereof in 2 and 3 can be easily realized by software in addition to hardware.

[0035]

The present invention is constructed as described above, and in particular, the temperature information inside the display device is obtained by the temperature obtaining means, and the luminance control means controls the light emitting element based on the temperature information to reduce the brightness of the image. By controlling, instead of cooling the temperature inside the display device, the high brightness of the light emitting element which causes the temperature inside the display device which could not be controlled only by the exhaust fan and the high brightness due to the high brightness of the light emitting element can be obtained. Control
By automatically lowering the brightness, it is possible to control so that the temperature in the display device does not become higher than the appropriate temperature range.

According to the present invention, the temperature obtaining means is further provided in the display panel, and the temperature information obtained by the temperature obtaining means is multiplexed and transmitted on a transmission line for transmitting other information such as luminance control information. Accordingly, management can be simplified and cost can be reduced without installing a special transmission path.

According to the present invention, furthermore, a plurality of display panels are provided at various places or in the entire area of the display device, and temperature distribution information at each position of the display panel of the display device is obtained from the plurality of pieces of temperature information. By controlling the light emission luminance of the light emitting element based on this, it is possible to control the luminance value with optimum temperature information for the entire screen. It is efficient to arrange the display panels on the entire screen of the display device so as to be arranged at equal intervals, since the position of the display device can be indicated by the position of the display plate.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a large-sized video display device according to a first embodiment of the present invention;

FIG. 2 is a flowchart showing an example of the operation of the large-sized image display device shown in FIG. 1,

FIG. 3 is a block diagram showing a configuration of a large-sized video display device according to a second embodiment of the present invention;

FIG. 4 is a block diagram showing a configuration of a large-sized video display device according to a third embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 large image display device 2 large image display device 3 large image display device 7 display panel 8 controller unit 9 display panel 10 temperature acquisition unit 11 storage unit 12 control / computation processing unit 13 light emission control unit 14 light emitting element 15 light emission unit 16 transmission path 17 Display panel

Claims (10)

[Claims] A temperature acquisition unit for acquiring temperature information of the device; and a light emission control unit for controlling luminance information for a light emitting element based on the temperature information acquired by the temperature acquisition unit. A light-emitting element that emits light according to the obtained luminance information. A temperature acquisition unit for acquiring temperature information of the apparatus; a storage unit for storing the temperature information acquired by the temperature acquisition unit; and luminance information for the light emitting element based on the temperature information stored by the storage unit. A display device, comprising: a light-emission control unit for controlling the light-emitting element to emit light according to luminance information controlled according to the temperature of the device. 3. A plurality of temperature obtaining means provided around the light emitting element to obtain temperature information at each installation position, and the position information and the temperature information output from the plurality of temperature obtaining means are stored in each of the temperature obtaining means. The display device, comprising: storage means for storing the temperature distribution information of the display device based on the installation position; and light emission control means for controlling a luminance value for the light emitting element based on the temperature distribution information read from the storage means. A light emitting element that emits light according to a luminance value of the light emitting element controlled according to a temperature based on the temperature distribution information. 4. A plurality of temperature obtaining means provided in a plurality of display panels each having a light emitting element for obtaining temperature information at each installation position, and displaying the temperature information output from the plurality of temperature obtaining means on the display panel. Storage means for storing as temperature distribution information corresponding to each installation position, and light emission control means for controlling a luminance value for the light emitting element based on the temperature distribution information read from the storage means,
A display device, wherein the light emitting device emits light according to a luminance value of the light emitting device controlled according to a temperature based on temperature distribution information of the display device. 5. A signal for transmitting temperature information obtained by the temperature obtaining means, wherein the temperature obtaining means is located around the light emitting element, and a signal for transmitting luminance information from the light emission control means to the light emitting element. 5. The display device according to claim 1, wherein the display device is multiplexed using the same transmission path. 6. The temperature information of the device is obtained, and it is determined whether or not the obtained temperature information is within a proper temperature range. If the temperature information is within the proper temperature range, the luminance value of the light emitting element is not changed, If the temperature value is lower than the appropriate temperature range, the brightness value of the light emitting element is decreased, and if the temperature information is lower than the appropriate temperature range, the brightness value of the light emitting element is controlled to increase, and the light emitting element emits light with the controlled brightness value. A method for controlling a temperature of a display device. 7. A temperature information inside the display device is obtained, the obtained temperature information is stored in a storage means, and a temperature calculation result based on the plurality of temperature information stored in the storage means is set within an appropriate temperature range. The brightness value of the light emitting element is not changed if it is determined whether or not there is an appropriate temperature range, and if the temperature calculation result is higher than the appropriate temperature range, the brightness value of the light emitting element is reduced, and the temperature calculation result is higher than the appropriate temperature range. A method for controlling the temperature of a display device, comprising the steps of: controlling the luminance value of the light emitting element to increase if the luminance is low, and causing the light emitting element to emit light according to the controlled luminance value. 8. The step of obtaining the temperature information of the apparatus includes the steps of obtaining temperature information from a plurality of locations of the apparatus, and the step of storing the obtained temperature information in a storage unit. Storing temperature information and position information as temperature distribution information corresponding to each position of the location, and determining whether or not the temperature is within an appropriate temperature range based on the temperature information read from the storage means; 8. The temperature control method for a display device according to claim 7, wherein it is determined whether or not the temperature is within an appropriate temperature range based on the information, and a luminance value for causing the light emitting element to emit light is controlled according to a result of the determination. 9. The step of obtaining temperature information of the device includes obtaining temperature information from a display panel of the device, and the step of storing the temperature information in storage means includes a step of obtaining temperature distribution information corresponding to a position of the display panel. 9. The method according to claim 7, wherein the position information and the temperature information of the display panel are stored. 10. The method according to claim 1, further comprising a step of multiplexing and transmitting the temperature information obtained in the step of obtaining the temperature information of the device and the luminance value in the step of causing the light emitting element to emit light by the controlled luminance value. 10. The temperature control method for a display device according to claim 6, 7, 8, or 9.