JP2014206481A - Radar display device - Google Patents

Radar display device Download PDF

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JP2014206481A
JP2014206481A JP2013084709A JP2013084709A JP2014206481A JP 2014206481 A JP2014206481 A JP 2014206481A JP 2013084709 A JP2013084709 A JP 2013084709A JP 2013084709 A JP2013084709 A JP 2013084709A JP 2014206481 A JP2014206481 A JP 2014206481A
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liquid crystal
crystal panel
temperature
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transparent conductive
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JP6155078B2 (en
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晴彦 西山
Haruhiko Nishiyama
晴彦 西山
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Toshiba Electro Wave Products Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a radar display device that enables a temperature of a liquid crystal surface to be accurately measured and enables a heating device to be appropriately controlled.SOLUTION: The radar display device comprises: a liquid crystal panel; glass; first and second transparent conductive films; a power source unit; and a control part. The glass is attached to a surface of the liquid crystal panel. The first transparent conductive film is disposed between the liquid crystal panel and the glass so as to come into contact with the surface of the liquid crystal panel, and is heated by a drive electric power being supplied. The second transparent conductive film is disposed between the liquid crystal panel and the glass so as to come into contact with the surface of the liquid crystal panel, and generates a first electric power by a temperature change in the surface of the liquid crystal panel. The power source unit supplies the drive electric power to the first transparent conductive film, and the control part estimates a first temperature on the basis of the first electric power, and implements an ON/OFF control of the power source unit on the basis of the first temperature.

Description

本発明の実施形態は、航空機等に搭載されるレーダ表示装置に関する。   Embodiments described herein relate generally to a radar display device mounted on an aircraft or the like.

一般に、航空機等に搭載される液晶は温度が下がると電界に対する応答速度が低下する。このため、低温環境においても表示性能を維持させるように液晶表面を温熱装置（ヒータ）等により温める必要がある。ただし、常温時には、加熱の必要はなく、反対に液晶の寿命の観点からもなるべく加熱を止める方が望ましい。   In general, the liquid crystal mounted on an aircraft or the like has a lower response speed to an electric field when the temperature decreases. For this reason, it is necessary to warm the liquid crystal surface with a heating device (heater) or the like so as to maintain display performance even in a low temperature environment. However, at room temperature, there is no need for heating. Conversely, it is desirable to stop heating as much as possible from the viewpoint of the life of the liquid crystal.

従来は、レーダ表示装置内部に温度センサを設置し、温熱装置の電源を制御して加熱を止める方法を採用している。ただし、温度センサを利用する場合、レーダ表示装置内部しか温度センサを設置できる場所がない。すなわち、液晶表面に温度センサを設置することはできない。このため、温度センサにより計測される温度と、液晶表面の温度とには誤差が生じることとなり、温度センサにより計測される温度に基づいて設定される設定温度に対し、液晶表面の温度が高くなりすぎる傾向にある。設定温度に対して液晶表面の温度が高い場合、液晶を必要以上に温めることになり、温熱装置における消費電力が増大することとなる。   Conventionally, a method is adopted in which a temperature sensor is installed inside the radar display device, and the heating is stopped by controlling the power supply of the heating device. However, when the temperature sensor is used, there is no place where the temperature sensor can be installed only inside the radar display device. That is, a temperature sensor cannot be installed on the liquid crystal surface. For this reason, an error occurs between the temperature measured by the temperature sensor and the temperature of the liquid crystal surface, and the temperature of the liquid crystal surface becomes higher than the set temperature set based on the temperature measured by the temperature sensor. It tends to be too much. When the temperature of the liquid crystal surface is higher than the set temperature, the liquid crystal is heated more than necessary, and the power consumption in the heating device increases.

特開２００６−４７４５５号公報JP 2006-47455 A

以上のように、従来のレーダ表示装置では、レーダ表示装置内部に温度センサを設置しているため、温度センサにより計測される温度と、液晶表面の温度との間に誤差がある。そのため、液晶表面の温度を正確に計測することが不可能であり、温熱装置を適切に制御することが不可能であった。   As described above, in the conventional radar display device, since the temperature sensor is installed inside the radar display device, there is an error between the temperature measured by the temperature sensor and the temperature of the liquid crystal surface. Therefore, it is impossible to accurately measure the temperature of the liquid crystal surface, and it is impossible to appropriately control the heating device.

そこで、目的は、液晶表面の温度を正確に計測することが可能であり、温熱装置を適切に制御することが可能なレーダ表示装置を提供することにある。   Therefore, an object is to provide a radar display device capable of accurately measuring the temperature of the liquid crystal surface and capable of appropriately controlling the heating device.

実施形態によれば、レーダ表示装置は、液晶パネル、ガラス、第１及び第２の透明導電膜、電源ユニット及び制御部を具備する。ガラスは、前記液晶パネルの表面に取り付けられる。第１の透明導電膜は、前記液晶パネルの表面に接触するように、前記液晶パネルと前記ガラスとの間に設けられ、駆動電力が供給されることで発熱する。第２の透明導電膜は、前記液晶パネルの表面に接触するように、前記液晶パネルと前記ガラスとの間に設けられ、前記液晶パネルの表面の温度変化により第１の電力を生成する。電源ユニットは、前記第１の透明導電膜へ前記駆動電力を供給する。制御部は、前記第１の電力に基づいて第１の温度を推定し、前記第１の温度に基づいて前記電源ユニットのオン／オフ制御を実施する。   According to the embodiment, the radar display device includes a liquid crystal panel, glass, first and second transparent conductive films, a power supply unit, and a control unit. The glass is attached to the surface of the liquid crystal panel. The first transparent conductive film is provided between the liquid crystal panel and the glass so as to be in contact with the surface of the liquid crystal panel, and generates heat when driving power is supplied. The second transparent conductive film is provided between the liquid crystal panel and the glass so as to be in contact with the surface of the liquid crystal panel, and generates a first power by a temperature change of the surface of the liquid crystal panel. The power supply unit supplies the driving power to the first transparent conductive film. The controller estimates a first temperature based on the first power, and performs on / off control of the power supply unit based on the first temperature.

本実施形態に係るレーダ表示装置の機能構成を示す図である。It is a figure which shows the function structure of the radar display apparatus which concerns on this embodiment. 図１に示すガラスに発熱用ＩＴＯ、第１のセンサ用ＩＴＯ、及び、第２のセンサ用ＩＴＯが蒸着される際の図を示す。The figure at the time of ITO for heat generation, ITO for 1st sensors, and ITO for 2nd sensors being vapor-deposited on the glass shown in FIG. 1 is shown. 図２の破線部における断面図を示す。Sectional drawing in the broken-line part of FIG. 2 is shown. 図２，３に示す発熱用ＩＴＯ、第１のセンサ用ＩＴＯ、及び、第２のセンサ用ＩＴＯが蒸着されたガラスが、液晶パネルに取り付けられる際の図を示す。The figure at the time of the glass in which the ITO for heat_generation | fever shown in FIG.2,3, ITO for 1st sensor, and ITO for 2nd sensor having been vapor-deposited attached to a liquid crystal panel is shown. 図１に示す制御部が電源ユニットをオンからオフへ切り替える際の図を示す。The figure when the control part shown in FIG. 1 switches a power supply unit from ON to OFF is shown. 図１に示す制御部が電源ユニットをオフからオンへ切り替える際の図を示す。The figure when the control part shown in FIG. 1 switches a power supply unit from OFF to ON is shown.

以下、実施の形態について、図面を参照して説明する。   Hereinafter, embodiments will be described with reference to the drawings.

図１は、本実施形態に係るレーダ表示装置１０の機能構成を示す模式図である。図１に示すレーダ表示装置１０は、液晶パネル１１、発熱用ＩＴＯ（Indium Tin Oxide）１２、第１のセンサ用ＩＴＯ１３、第２のセンサ用ＩＴＯ１４、ガラス１５、電源ユニット１６及び制御部１７を具備する。   FIG. 1 is a schematic diagram illustrating a functional configuration of a radar display device 10 according to the present embodiment. The radar display device 10 shown in FIG. 1 includes a liquid crystal panel 11, a heat generating ITO (Indium Tin Oxide) 12, a first sensor ITO 13, a second sensor ITO 14, a glass 15, a power supply unit 16 and a control unit 17. To do.

液晶パネル１１は、計測により得られる計測結果を表示する。液晶パネル１１は、温度が０度以下に下がると、電界に対する応答速度が低下する。   The liquid crystal panel 11 displays the measurement result obtained by the measurement. When the temperature of the liquid crystal panel 11 decreases to 0 degrees or less, the response speed to the electric field decreases.

発熱用ＩＴＯ１２は、透明導電膜であり、一方の面がガラス１５に蒸着される。発熱用ＩＴＯ１２は、液晶パネル１１の表面における表示エリアを覆うようにガラス１５に蒸着される。   The heat generating ITO 12 is a transparent conductive film, and one surface is deposited on the glass 15. The heating ITO 12 is deposited on the glass 15 so as to cover the display area on the surface of the liquid crystal panel 11.

発熱用ＩＴＯ１２は、陽電極、陰電極及び抵抗部を備える。陽電極と陰電極とは、電源ユニット１６と接続する。電源ユニット１６により陽電極と陰電極との間に電位差が与えられることで、発熱用ＩＴＯ１２において陽電極が設けられる部位には、陽電荷が誘起され、陰電極が設けられる部位には陰電荷が誘起される。発熱用ＩＴＯ１２の抵抗部は、陽電極と陰電極との電位差により生じる電流により発熱する。ガラス１５が液晶パネル１１に取り付けられる際、発熱用ＩＴＯ１２の他方の面は液晶パネル１１に接触する。発熱用ＩＴＯ１２は、抵抗部の発熱により、液晶パネル１１を加熱する。   The heat generating ITO 12 includes a positive electrode, a negative electrode, and a resistance portion. The positive electrode and the negative electrode are connected to the power supply unit 16. By applying a potential difference between the positive electrode and the negative electrode by the power supply unit 16, a positive charge is induced in the portion where the positive electrode is provided in the heat generating ITO 12, and a negative charge is generated in the portion where the negative electrode is provided. Induced. The resistance portion of the heat generating ITO 12 generates heat due to a current generated by a potential difference between the positive electrode and the negative electrode. When the glass 15 is attached to the liquid crystal panel 11, the other surface of the heat generating ITO 12 contacts the liquid crystal panel 11. The heat generating ITO 12 heats the liquid crystal panel 11 by the heat generated by the resistance portion.

第１のセンサ用ＩＴＯ１３は、透明導電膜であり、ガラス１５を液晶パネル１１に取り付けた際に、液晶パネル１１の上部に相当するガラス１５の位置に蒸着される。第１のセンサ用ＩＴＯ１３は、液晶パネル１１の表面における表示エリア外の上部において、液晶パネル１１の左端から右端までのほぼすべての領域を覆うようにガラス１５に蒸着される。   The first sensor ITO 13 is a transparent conductive film, and is deposited at the position of the glass 15 corresponding to the upper part of the liquid crystal panel 11 when the glass 15 is attached to the liquid crystal panel 11. The first sensor ITO 13 is deposited on the glass 15 so as to cover almost the entire region from the left end to the right end of the liquid crystal panel 11 in the upper portion outside the display area on the surface of the liquid crystal panel 11.

第１のセンサ用ＩＴＯ１３は、陽電極、陰電極及び抵抗部を備える。陽電極と陰電極とは、制御部１７と接続する。抵抗部では、液晶パネル１１の温度が変化すると電流が発生する。抵抗部に電流が発生することで、第１のセンサ用ＩＴＯ１３において陽電極が設けられる部位に陽電荷が誘起され、陰電極が設けられる部位に陰電荷が誘起される。制御部１７には、陽電極と陰電極との電位差により生じる第１の電流が与えられる。   The first sensor ITO 13 includes a positive electrode, a negative electrode, and a resistance portion. The positive electrode and the negative electrode are connected to the control unit 17. In the resistance portion, current is generated when the temperature of the liquid crystal panel 11 changes. When a current is generated in the resistance portion, a positive charge is induced in a portion where the positive electrode is provided in the first sensor ITO 13, and a negative charge is induced in a portion where the negative electrode is provided. The controller 17 is given a first current generated by the potential difference between the positive electrode and the negative electrode.

第２のセンサ用ＩＴＯ１４は、透明導電膜であり、ガラス１５を液晶パネル１１に取り付けた際に、液晶パネル１１の下部に相当するガラス１５の位置に蒸着される。第２のセンサ用ＩＴＯ１４は、液晶パネル１１の表面における表示エリア外の下部において、液晶パネル１１の左端から右端までのほぼすべての領域を覆うようにガラス１５に蒸着される。   The second sensor ITO 14 is a transparent conductive film, and is deposited on the glass 15 corresponding to the lower part of the liquid crystal panel 11 when the glass 15 is attached to the liquid crystal panel 11. The second sensor ITO 14 is deposited on the glass 15 so as to cover almost the entire region from the left end to the right end of the liquid crystal panel 11 in the lower portion outside the display area on the surface of the liquid crystal panel 11.

第２のセンサ用ＩＴＯ１４は、陽電極、陰電極及び抵抗部を備える。陽電極と陰電極とは、制御部１７と接続する。抵抗部では、液晶パネル１１の温度が変化すると電流が発生する。抵抗部に電流が発生することで、第２のセンサ用ＩＴＯ１４において陽電極が設けられる部位に陽電荷が誘起され、陰電極が設けられる部位に陰電荷が誘起される。制御部１７には、陽電極と陰電極との電位差により生じる第２の電流が与えられる。   The second ITO for sensor 14 includes a positive electrode, a negative electrode, and a resistance portion. The positive electrode and the negative electrode are connected to the control unit 17. In the resistance portion, current is generated when the temperature of the liquid crystal panel 11 changes. When a current is generated in the resistance portion, a positive charge is induced in a portion where the positive electrode is provided in the second sensor ITO 14, and a negative charge is induced in a portion where the negative electrode is provided. The controller 17 is given a second current generated by the potential difference between the positive electrode and the negative electrode.

ガラス１５は、発熱用ＩＴＯ１２、第１のセンサ用ＩＴＯ１３、及び、第２のセンサ用ＩＴＯ１４が蒸着される。図２は、ガラス１５に発熱用ＩＴＯ１２、第１のセンサ用ＩＴＯ１３、及び、第２のセンサ用ＩＴＯ１４が蒸着される際の模式図を示す。また、図３は、図２の破線部におけるガラス１５、発熱用ＩＴＯ１２、第１のセンサ用ＩＴＯ１３、及び、第２のセンサ用ＩＴＯ１４の断面図を示す。図２において、発熱用ＩＴＯ１２は、液晶パネル１１の表面における表示エリアを覆うように、略長方形形状でガラス１５に蒸着される。第１のセンサ用ＩＴＯ１３は、液晶パネル１１の表面における表示エリア外の上部において、液晶パネル１１の左端から右端までのほぼすべての領域を覆うように、折り返されてガラス１５に蒸着される。第２のセンサ用ＩＴＯ１４は、液晶パネル１１の表面における表示エリア外の下部において、液晶パネル１１の左端から右端までのほぼすべての領域を覆うように、折り返されてガラス１５に蒸着される。図４は、発熱用ＩＴＯ１２、第１のセンサ用ＩＴＯ１３、及び、第２のセンサ用ＩＴＯ１４が蒸着されたガラス１５が、液晶パネル１１に取り付けられた際の模式図を示す。   On the glass 15, the heating ITO 12, the first sensor ITO 13, and the second sensor ITO 14 are deposited. FIG. 2 is a schematic diagram when the heat generating ITO 12, the first sensor ITO 13, and the second sensor ITO 14 are deposited on the glass 15. FIG. FIG. 3 is a cross-sectional view of the glass 15, the heat generating ITO 12, the first sensor ITO 13, and the second sensor ITO 14 in the broken line portion of FIG. In FIG. 2, the heating ITO 12 is deposited on the glass 15 in a substantially rectangular shape so as to cover the display area on the surface of the liquid crystal panel 11. The first sensor ITO 13 is folded and deposited on the glass 15 so as to cover almost the entire region from the left end to the right end of the liquid crystal panel 11 in the upper portion outside the display area on the surface of the liquid crystal panel 11. The second sensor ITO 14 is folded back and deposited on the glass 15 so as to cover almost the entire region from the left end to the right end of the liquid crystal panel 11 at the lower portion outside the display area on the surface of the liquid crystal panel 11. FIG. 4 is a schematic diagram when the glass 15 on which the heat generating ITO 12, the first sensor ITO 13, and the second sensor ITO 14 are deposited is attached to the liquid crystal panel 11.

電源ユニット１６は、制御部１７の指示に従い、発熱用ＩＴＯ１２への電力の印加をオン／オフする。電源ユニット１６は、オンとなっている際に、発熱用ＩＴＯ１２へ電力を印加し、オフとなっている際に、発熱用ＩＴＯ１２への電力の印加を停止する。   The power supply unit 16 turns on / off the application of power to the heat generating ITO 12 in accordance with an instruction from the control unit 17. The power supply unit 16 applies power to the heat generating ITO 12 when it is on, and stops applying power to the heat generating ITO 12 when it is off.

制御部１７は、第１のセンサ用ＩＴＯ１３から出力される第１の電流を受け取る。制御部１７は、受け取った第１の電流から第１の電力レベルを求める。制御部１７は、電力レベルと、液晶パネル１１の表面温度との関係を予め記録している。制御部１７は、記録している関係を用い、求めた第１の電力レベルから、液晶パネル１１の表面における第１の温度を推定する。また、制御部１７は、例えば、１０度程度を第１の閾値温度として設定する。なお、ここで、第１の閾値温度とは、急激な温度変化があった場合であっても、液晶パネル１１の表面の温度を後述する第２の閾値温度以上で維持可能な温度である。制御部１７は、電源ユニット１６がオンの状態において、第１の温度が第１の閾値温度未満の温度から第１の閾値温度に達した場合、電源ユニット１６に対してオフ制御を実施する。図５は、制御部１７が電源ユニット１６をオンからオフへ切り替える際の模式図を示す。   The control unit 17 receives the first current output from the first sensor ITO 13. The control unit 17 obtains a first power level from the received first current. The control unit 17 records the relationship between the power level and the surface temperature of the liquid crystal panel 11 in advance. The control unit 17 estimates the first temperature on the surface of the liquid crystal panel 11 from the obtained first power level using the recorded relationship. Further, the control unit 17 sets, for example, about 10 degrees as the first threshold temperature. Here, the first threshold temperature is a temperature at which the temperature of the surface of the liquid crystal panel 11 can be maintained at a second threshold temperature or higher, which will be described later, even when there is a sudden temperature change. When the first temperature reaches the first threshold temperature from a temperature lower than the first threshold temperature in a state where the power supply unit 16 is on, the control unit 17 performs the off control on the power supply unit 16. FIG. 5 is a schematic diagram when the control unit 17 switches the power supply unit 16 from on to off.

制御部１７は、第２のセンサ用ＩＴＯ１４から出力される第２の電流を受け取る。制御部１７は、受け取った第２の電流から第２の電力レベルを求める。制御部１７は、記録している関係を用い、求めた第２の電力レベルから、液晶パネル１１の表面における第２の温度を推定する。制御部１７は、例えば、０度を第２の閾値温度と設定する。なお、ここで、第２の閾値温度とは、液晶パネル１１が電界に対して規定通りの表示動作を行える温度である。制御部１７は、電源ユニット１６がオフの状態において、第２の温度が第２の閾値温度を超える温度から第２の閾値温度に達した場合、電源ユニット１６に対してオン制御を実施する。図６は、制御部１７が電源ユニット１６をオフからオンへ切り替える際の模式図を示す。   The control unit 17 receives the second current output from the second sensor ITO 14. The control unit 17 obtains a second power level from the received second current. The control unit 17 estimates the second temperature on the surface of the liquid crystal panel 11 from the obtained second power level using the recorded relationship. For example, the control unit 17 sets 0 degree as the second threshold temperature. Here, the second threshold temperature is a temperature at which the liquid crystal panel 11 can perform a prescribed display operation with respect to an electric field. When the second temperature reaches the second threshold temperature from the temperature exceeding the second threshold temperature in a state where the power supply unit 16 is off, the control unit 17 performs the on control on the power supply unit 16. FIG. 6 is a schematic diagram when the control unit 17 switches the power supply unit 16 from OFF to ON.

以上のように、本実施形態では、レーダ表示装置１０は、液晶パネル１１とガラス１５との間に、発熱用ＩＴＯ１２、第１のセンサ用ＩＴＯ１３、及び、第２のセンサ用ＩＴＯ１４を設けるようにしている。これにより、レーダ表示装置１０は、液晶パネル１１の表面に接触するように第１及び第２のセンサ用ＩＴＯ１３，１４が設けられることになり、液晶パネル１１の表面の温度を正確に計測することが可能となる。   As described above, in the present embodiment, the radar display device 10 is provided with the heat generating ITO 12, the first sensor ITO 13, and the second sensor ITO 14 between the liquid crystal panel 11 and the glass 15. ing. Accordingly, the radar display device 10 is provided with the first and second sensor ITOs 13 and 14 so as to be in contact with the surface of the liquid crystal panel 11, and accurately measures the temperature of the surface of the liquid crystal panel 11. Is possible.

また、本実施形態では、第１のセンサ用ＩＴＯ１３は、液晶パネル１１の上部に位置するように設置され、第２のセンサ用ＩＴＯ１４は、液晶パネル１１の下部に位置するように設置される。制御部１７は、電源ユニット１６がオン状態であり、かつ、第１のセンサ用ＩＴＯ１３から出力される第１の電流に基づく第１の温度が第１の閾値温度に温度上昇中に達する場合、電源ユニット１６をオフ状態とする。また、制御部１７は、電源ユニット１６がオフ状態であり、かつ、第２のセンサ用ＩＴＯ１４から出力される第２の電流に基づく第２の温度が第２の閾値温度に温度下降中に達する場合、電源ユニット１６をオン状態とする。   In the present embodiment, the first sensor ITO 13 is disposed so as to be positioned above the liquid crystal panel 11, and the second sensor ITO 14 is disposed so as to be positioned below the liquid crystal panel 11. When the power supply unit 16 is in the ON state and the first temperature based on the first current output from the first sensor ITO 13 reaches the first threshold temperature while the temperature rises, the control unit 17 The power supply unit 16 is turned off. Further, the controller 17 is in a state where the power supply unit 16 is in an off state, and the second temperature based on the second current output from the second sensor ITO 14 reaches the second threshold temperature while the temperature is decreasing. In this case, the power supply unit 16 is turned on.

液晶パネル１１の表面において、上部の温度は下部の温度よりも高いことが知られている。つまり、第１のセンサ用ＩＴＯ１３から与えられる第１の電流により求められる第１の温度、すなわち、液晶パネル１１の上部で計測される温度は、液晶パネル１１の表面で計測される温度のうちで最も高い温度である。制御部１７は、第１の温度に基づいて電源ユニット１６をオンからオフへ切り替えるように制御しているため、液晶パネルの表面の温度が必要以上に高くならないように正確に管理することが可能となる。   It is known that the upper temperature is higher than the lower temperature on the surface of the liquid crystal panel 11. That is, the first temperature obtained by the first current given from the first sensor ITO 13, that is, the temperature measured at the top of the liquid crystal panel 11 is the temperature measured at the surface of the liquid crystal panel 11. The highest temperature. Since the control unit 17 controls the power supply unit 16 to be switched from on to off based on the first temperature, it can be accurately managed so that the temperature of the surface of the liquid crystal panel does not become higher than necessary. It becomes.

一方、第２のセンサ用ＩＴＯ１４から与えられる第２の電流により求められる第２の温度、すなわち、液晶パネル１１の下部で計測される温度は、液晶パネル１１の表面で計測される温度のうちで最も低い温度である。制御部１７は、第２の温度に基づいて電源ユニット１６をオフからオンへ切り替えるように制御しているため、液晶パネルの表面の温度が０度未満にならないように正確に管理することが可能となる。   On the other hand, the second temperature obtained by the second current supplied from the second sensor ITO 14, that is, the temperature measured at the lower part of the liquid crystal panel 11 is the temperature measured at the surface of the liquid crystal panel 11. The lowest temperature. Since the control unit 17 controls the power supply unit 16 to be switched from OFF to ON based on the second temperature, it can be accurately managed so that the temperature of the surface of the liquid crystal panel does not become less than 0 degrees. It becomes.

したがって、本実施形態に係るレーダ表示装置１０によれば、液晶表面の温度を正確に計測でき、温熱装置を適切に制御できる。これにより、液晶パネルの寿命延長が期待できると共に、消費電力を抑制することができる。   Therefore, according to the radar display device 10 according to the present embodiment, the temperature of the liquid crystal surface can be accurately measured, and the thermal device can be appropriately controlled. Thereby, the lifetime of the liquid crystal panel can be expected to be extended and the power consumption can be suppressed.

本発明の実施形態を説明したが、この実施形態は、例として提示したものであり、発明の範囲を限定することは意図していない。この実施形態は、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことができる。この実施形態やその変形は、発明の範囲や要旨に含まれると同様に、特許請求の範囲に記載された発明とその均等の範囲に含まれるものである。   Although the embodiment of the present invention has been described, this embodiment is presented as an example and is not intended to limit the scope of the invention. This embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. This embodiment and its modifications are included in the scope of the present invention and the gist thereof, and are also included in the invention described in the claims and the equivalent scope thereof.

１０…レーダ表示装置、１１…液晶パネル、１２…発熱用ＩＴＯ、１３…第１のセンサ用ＩＴＯ、１４…第２のセンサ用ＩＴＯ、１５…ガラス、１６…電源ユニット、１７…制御部   DESCRIPTION OF SYMBOLS 10 ... Radar display apparatus, 11 ... Liquid crystal panel, 12 ... ITO for heat generation, 13 ... ITO for 1st sensors, 14 ... ITO for 2nd sensors, 15 ... Glass, 16 ... Power supply unit, 17 ... Control part

Claims (3)

液晶パネルと、
前記液晶パネルの表面に取り付けられるガラスと、
前記液晶パネルの表面に接触するように、前記液晶パネルと前記ガラスとの間に設けられ、駆動電力が供給されることで発熱する第１の透明導電膜と、
前記液晶パネルの表面に接触するように、前記液晶パネルと前記ガラスとの間に設けられ、前記液晶パネルの表面の温度変化により第１の電力を生成する第２の透明導電膜と、
前記第１の透明導電膜へ前記駆動電力を供給する電源ユニットと、
前記第１の電力に基づいて第１の温度を推定し、前記第１の温度に基づいて前記電源ユニットのオン／オフ制御を実施する制御部と
を具備するレーダ表示装置。 LCD panel,
Glass attached to the surface of the liquid crystal panel;
A first transparent conductive film that is provided between the liquid crystal panel and the glass so as to be in contact with the surface of the liquid crystal panel, and generates heat when supplied with driving power;
A second transparent conductive film that is provided between the liquid crystal panel and the glass so as to be in contact with the surface of the liquid crystal panel, and generates a first power by a temperature change of the surface of the liquid crystal panel;
A power supply unit for supplying the driving power to the first transparent conductive film;
A radar display device comprising: a controller that estimates a first temperature based on the first power and performs on / off control of the power supply unit based on the first temperature. 前記液晶パネルの表面下方に接触するように、前記液晶パネルと前記ガラスとの間に設けられ、前記液晶パネルの表面下部の温度変化により第２の電力を生成する第３の透明導電膜を具備し、
前記第２の透明導電膜は、前記液晶パネルの表面上部に接触するように、前記液晶パネルと前記ガラスとの間に設けられ、前記液晶パネルの表面上部の温度変化により第１の電力を生成し、
前記制御部は、前記第１の電力に基づいて第１の温度を推定し、前記電源ユニットから前記第１の透明導電膜へ前記駆動電力が供給され、かつ、前記第１の温度が予め設定する第１の閾値温度に温度上昇中に達した場合、前記駆動電力の供給を停止し、
前記制御部は、前記第２の電力に基づいて第２の温度を推定し、前記電源ユニットから前記第１の透明導電膜へ前記駆動電力が供給されず、かつ、前記第２の温度が予め設定する第２の閾値温度に温度下降に達した場合、前記駆動電力の供給を開始する請求項１記載のレーダ表示装置。 A third transparent conductive film is provided between the liquid crystal panel and the glass so as to be in contact with a lower surface of the liquid crystal panel, and generates a second power by a temperature change at a lower surface of the liquid crystal panel. And
The second transparent conductive film is provided between the liquid crystal panel and the glass so as to be in contact with the upper surface of the liquid crystal panel, and generates a first power by a temperature change of the upper surface of the liquid crystal panel. And
The controller estimates a first temperature based on the first power, the driving power is supplied from the power supply unit to the first transparent conductive film, and the first temperature is preset. When the temperature reaches the first threshold temperature during the temperature rise, the supply of the driving power is stopped,
The controller estimates a second temperature based on the second power, the driving power is not supplied from the power supply unit to the first transparent conductive film, and the second temperature is set in advance. The radar display device according to claim 1, wherein when the temperature reaches a second threshold temperature to be set, the supply of the driving power is started. 液晶パネルと、
前記液晶パネルの表面に取り付けられるガラスと、
前記液晶パネルの表面に接触するように、前記液晶パネルと前記ガラスとの間に設けられ、駆動電力が供給されることで発熱する第１の透明導電膜と、
前記液晶パネルの表面上部に接触するように、前記液晶パネルと前記ガラスとの間に設けられ、前記液晶パネルの表面上部の温度変化により第１の電力を生成する第２の透明導電膜と、
前記液晶パネルの表面下方に接触するように、前記液晶パネルと前記ガラスとの間に設けられ、前記液晶パネルの表面下部の温度変化により第２の電力を生成する第３の透明導電膜と、
前記第１の透明導電膜へ前記駆動電力を供給する電源ユニットと、
前記第１の電力に基づいて第１の温度を推定し、前記電源ユニットから前記第１の透明導電膜へ前記駆動電力が供給され、かつ、前記第１の温度が予め設定する第１の閾値温度に温度上昇中に達した場合、前記駆動電力の供給を停止し、前記第２の電力に基づいて第２の温度を推定し、前記電源ユニットから前記第１の透明導電膜へ前記駆動電力が供給されず、かつ、前記第２の温度が予め設定する第２の閾値温度に温度下降に達した場合、前記駆動電力の供給を開始する制御部と
を具備するレーダ表示装置。 LCD panel,
Glass attached to the surface of the liquid crystal panel;
A first transparent conductive film that is provided between the liquid crystal panel and the glass so as to be in contact with the surface of the liquid crystal panel, and generates heat when supplied with driving power;
A second transparent conductive film that is provided between the liquid crystal panel and the glass so as to be in contact with the upper surface of the liquid crystal panel, and generates first electric power by a temperature change of the upper surface of the liquid crystal panel;
A third transparent conductive film provided between the liquid crystal panel and the glass so as to be in contact with a lower surface of the liquid crystal panel, and generating a second power by a temperature change at a lower surface of the liquid crystal panel;
A power supply unit for supplying the driving power to the first transparent conductive film;
A first temperature is estimated based on the first power, the driving power is supplied from the power supply unit to the first transparent conductive film, and the first threshold is preset by the first temperature. When the temperature reaches a temperature rise, the supply of the drive power is stopped, a second temperature is estimated based on the second power, and the drive power is transferred from the power supply unit to the first transparent conductive film. And a control unit that starts supplying the drive power when the second temperature reaches a second threshold temperature set in advance and the second temperature has decreased.
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