JP7348809B2 - display control device - Google Patents

Description

The present invention relates to a display control device that controls a display device configured by bonding a light control section and a display section.

2. Description of the Related Art In recent years, in moving objects such as railway vehicles, information such as stop stations and advertisements is displayed using a display device installed above the entrance of a guest room. Such a display device makes it possible to use moving images and to display images that match the driving conditions.

When the above-mentioned display device is installed in the window of a railway vehicle, external light and the like flow in from the back of the display, resulting in a problem that the clarity of the image is reduced and the contrast ratio is poor. Therefore, it is possible to apply the display device described in Patent Document 1.

Patent Document 1 uses a first panel 110 that performs a display using a transparent OLED light emitting element, and a polymer dispersed liquid crystal that is placed on the back of the first panel and blocks or transmits light from the back. It is described that the device includes a second panel 120 and a control unit 130 that switches the second panel to a transparent state or an opaque state.

Japanese Patent Application Publication No. 2013-156635

However, Patent Document 1 does not describe any method for displaying with appropriate brightness when the display device is applied to a window of a railway vehicle or the like. BACKGROUND ART Mobile objects such as railway vehicles move to various locations at various times, and therefore require appropriate control depending on the driving environment.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a display control device that can display a display device with appropriate brightness, which is configured by overlapping a light control section and a display section provided in a window opening of a moving object. shall be.

The present invention has been made to solve the above problems, in a display control device for controlling a display device configured by overlapping a light control section and a display section provided in a window opening of a moving object, in which the moving object is traveling. a driving environment information acquisition unit that acquires environmental information; and a control unit that controls the degree of dimming of the light control unit based on the driving environment information acquired by the driving environment information acquisition unit, and the display device is installed on a door. The driving environment information acquisition unit acquires door opening/closing information indicating opening/closing of the door, operation information of the mobile body, and information regarding the traveling speed of the mobile body, and the control unit The display control device is characterized in that the degree of dimming of the dimming section is controlled based on the opening/closing information, the operation information, and the information regarding the traveling speed.

Further, the driving environment information acquisition unit acquires detection information of a light sensor that detects brightness outside the moving object, and the control unit controls the light control level of the light control unit based on the detection information of the light sensor. control.

Furthermore, the display section may be configured with an electroluminescent element.

According to the present invention, the control unit adjusts the dimming level of the light control unit based on the driving environment information acquired by the driving environment information acquisition unit, so that the brightness can be adjusted appropriately based on the driving situation of a moving object such as a railway vehicle. can be displayed on the display device.

1 is a functional configuration diagram of a display control device according to an embodiment of the present invention and a display device controlled by the display control device. 2 is a flowchart of the operation of the condition calculation section shown in FIG. 1. FIG. FIG. 3 is a functional configuration diagram of a display control device and a display device controlled by the display control device according to another embodiment of the present invention.

A display control device according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 is a functional configuration diagram of a display control device 1 and a display device 2 controlled by the display control device 1 according to the present embodiment. The display control device 1 and the display device 2 are mounted on a railway vehicle. The display device 2 is provided, for example, in a window opening formed in a door of an entrance/exit in a guest room, and the display control device 1 is provided in the door. Note that although the following embodiments will be described using a railway vehicle as a moving object, it may be a bus or the like as long as it is a moving object that is operated according to a predetermined operation plan.

The display control device 1 includes a condition calculation section 11, an operation data storage section 12, a display control section 13, and a dimming control section 14.

The condition calculation unit 11 detects the operation data stored in the operation data storage unit 12, a speed signal indicating the speed of the railway vehicle, a door opening/closing signal indicating the open/closed state of the door, and the brightness outside the railway vehicle. The degree of dimming of the dimming unit 22 of the display device 2 is adjusted based on the output signal of the optical sensor. That is, the condition calculation section 11 functions as a traveling environment information acquisition section that acquires traveling environment information of the railway vehicle, and further functions as a control section that adjusts the degree of dimming of the dimming section 22 based on the traveling environment information. The operation data is operation information, the speed signal is information regarding the traveling speed, the door opening/closing signal is door opening/closing information, the optical sensor output signal is optical sensor detection information, and these pieces of information are traveling environment information.

The operation data storage unit 12 stores operation data of the train to which the railway vehicle belongs. The operation data includes train number, destination, stop station, type, setting point, dimming setting data, etc. The train number is a unique number given to the train to which the relevant railway vehicle belongs on the diagram. The destination is the destination of the train to which the train number is assigned. The stopping station is the stopping station of the train assigned the train number. The type is the type of the train to which the train number is assigned, such as local stop or express train. The set point is a distance from a station, for example, for a facility such as a tunnel or a point. In this embodiment, a point (point) for performing dimming control, which will be described later, is also set as a set point. The light control setting data is setting data for the light control degree of the light control unit 22, which will be described later.

The operation data storage section 12 also includes display data displayed on the display section 21 of the display device 2. Further, since the operation data storage section 12 may be changed due to the nature of the data as described above, it is preferable that the operation data storage section 12 is capable of being updated. For example, the operation data storage section 12 may be constituted by a semiconductor memory or the like, and in that case, it is sufficient to have means for communicating with the outside and to be able to be rewritten through communication. In this embodiment, since the display control device 1 is provided in the door, the communication means may be wired, but it is preferable to use wireless communication. Further, in this embodiment, the operation data is stored in advance in the display control device 1, but the operation data may be obtained by downloading from other devices in the railway vehicle, an external server, etc., if necessary, for example.

The display control unit 13 converts the display data read out from the operation data storage unit 12 by the condition calculation unit 11 in accordance with the output format to the display device 2 and outputs the converted data.

The dimming control section 14 adjusts the degree of dimming of the dimming section 22 of the display device 2 based on the dimming data output by the condition calculation section 11.

The display device 2 includes a display section 21 and a light control section 22. The display section 21 is composed of an EL (electroluminescence) display. The display unit 21 displays the display data output from the display control unit 13 toward the interior of the passenger compartment of the railway vehicle. The EL display of this embodiment is a well-known transparent display that is transparent when an image or the like is not displayed. In this embodiment, a transparent display is used to function as a window when images and the like are not displayed. Note that as long as the display is transparent, it is not limited to the EL display, and other types of displays such as a liquid crystal display may be used.

The light control section 22 is provided so as to be overlapped and bonded so as to be located on the back side of the display section 21 (outside the railway vehicle). The light control unit 22 is a glass whose light transmittance can be changed, and is composed of, for example, two pieces of glass and a layer formed between the two glasses and made of a material whose light transmittance is variable. There is. The material whose light transmittance is variable is, for example, a material such as liquid crystal or EC (electrochromic) whose light transmittance can be changed by applying/not applying a voltage. The light transmittance of the layer made of such a material as the light control unit 22 is controlled by applying a voltage from a transparent substrate formed of two sheets of glass. In other words, the degree of dimming can be changed by changing the light transmittance.

The speed signal is, for example, a signal output by speed detection means such as a speed generator provided in a railway vehicle. The door opening/closing signal is a signal indicating opening/closing of the door on which the display device 2 is provided. The optical sensor output signal is a signal output from an optical sensor provided, for example, at a window opening where the display device 2 is provided. The optical sensor only needs to be installed at a position where it can detect the brightness outside the railway vehicle. Further, as the optical sensor, an existing sensor may be used as long as it can detect the brightness outside the railway vehicle.

Next, the operation of the display control device 1 having the above-described configuration will be explained with reference to the flowchart shown in FIG. 2. The flowchart shown in FIG. 2 is mainly executed by the condition calculation unit 11.

First, the condition calculation unit 11 determines whether there is display control based on operation data (step S1). For example, whether or not display control based on operation data is to be performed can be set from the driver's cab, and the determination is made by referring to the setting. If there is no display control based on the operation data (step S1: No), the process advances to step S9, which will be described later.

On the other hand, if the display control based on the operation data is to be performed (step S1: Yes), the condition calculation unit 11 determines whether the operation data is being recognized (step S2). If the operation data is not being recognized because the operation data is not stored in the operation data storage section 12, etc., the process advances to step S9, which will be described later.

On the other hand, if the operation data is being recognized (step S2: Yes), the condition calculation unit 11 determines whether the dimming control point in the operation data is the current travel point (step S3). In step S3, the condition calculation unit 11 calculates the distance traveled based on the travel speed indicated by the speed signal after the door is closed to determine whether the light control point set in the operation data is to be performed (light adjustment point). The decision is made by comparing it with the calculated travel points. That is, after the door opening/closing signal indicates that the door is closed, the distance from the station (distance after the door is closed) is calculated based on the speed signal. Then, the determined distance and the dimming control point are compared. An example of such a dimming control point is a tunnel.

If the dimming control point matches the current travel point (step S3: Yes), the condition calculation unit 11 determines whether the dimming setting data specified by the operation data is a direct value (step S4). When the dimming setting data is a direct value, it means that the value specified in the dimming setting data is data indicating the dimming level of the dimming unit 22 as it is. The dimming intensity set in this dimming setting data is not limited to the characteristics of the point (tunnel, etc.), but may also be set according to the contents of the content to be displayed, or can be set based on both the characteristics of the point and the contents of the content. It may be set based on.

If the dimming setting data is a direct value (step S4: Yes), the condition calculation unit 11 sets the light sensor use flag to OFF and performs dimming control using the dimming setting data instructed by the operation data. (Step S5). That is, the degree of dimming indicated by the dimming setting data is output to the dimming control section 14 . Then, the dimming control section 14 adjusts (controls) the dimming degree of the dimming section 22 based on the dimming degree obtained from the condition calculating section 11 .

On the other hand, if the dimming setting data is not a direct value (step S4: No), the condition calculation unit 11 sets the optical sensor use flag to ON (step S6). Thereafter, dimming control is performed based on the optical sensor output signal.

Furthermore, if the dimming control point does not match the current travel point (step S3: No), the condition calculation unit 11 determines whether the optical sensor use flag is OFF (step S7). If the optical sensor use flag is OFF (step S7: Yes), the condition calculation unit 11 maintains the previous control state (step S8). That is, if the previous control state was based on operation data, control is performed using the operation data, and if the previous control state was an optical sensor, control is performed using the optical sensor.

Further, if step S1 is No, step S2 is No, and the optical sensor use flag is ON (step S7: No), the condition calculation unit 11 calculates that the optical sensor input value (optical sensor output signal) is in the condition table. It is determined whether or not it matches (step S9). That is, dimming control is performed based on the optical sensor output signal. As shown below, the condition table is a table that is set according to the time of day, evening, night, etc., and the weather, such as sunny or cloudy. It is determined whether the output signal (luminance) matches.

If the light sensor detection brightness is higher than the brightness indicating a clear daytime as determined in step S9, the condition calculation unit 11 controls the darkness of the light adjustment unit 22 to 100% (step S10). In other words, the condition calculation section 11 instructs the dimming control section 14 to set the dimming degree to a state (100%) that does not allow the passage of external light.

According to the judgment in step S9, if the light sensor detected brightness is higher than the brightness indicating a cloudy daytime and less than the brightness indicating a sunny daytime, the condition calculation unit 11 adjusts the intensity of the light control unit 22. control to 80% (step S11). That is, the condition calculation section 11 instructs the dimming control section 14 to set the dimming degree to 80%.

According to the judgment in step S9, if the light sensor detected brightness is higher than the brightness indicating evening and less than the brightness indicating cloudy daytime, the condition calculation unit 11 sets the intensity of the light control unit 22 to 60%. control (step S12). In other words, the condition calculation section 11 instructs the dimming control section 14 to set the dimming degree to 60%.

If it is determined in step S9 that the light sensor detected brightness is less than the brightness indicating night, the condition calculation unit 11 controls the darkness of the light control unit 22 to 0% (step S13). That is, the condition calculation section 11 instructs the dimming control section 14 to set the dimming degree to a state (0%) that allows all external light to pass through. Note that one or more steps may be provided between step S12 and step S13 to control the dimming level between 0% and 60%.

If the input value of the optical sensor does not match the condition table (outside the condition range), the condition calculation unit 11 controls the intensity (light control intensity) of the light control unit 22 to the ratio defined by default (step S14). ).

In steps S10 to S13 described above, the intensity (light control level) of the light control unit 22 is adjusted stepwise, but the light control level may be adjusted linearly according to the brightness value of the optical sensor.

Further, in the flowchart of FIG. 2, the usage of the operation data and the use of the optical sensor are separated, but they may be combined. For example, the configuration may be such that the direct value set in the operation data is used as a base and the direct value is finely adjusted based on the detection result of the optical sensor.

According to the present embodiment, in the display control device 1, the condition calculation unit 11 adjusts the light control unit 22 based on the operation data as the running environment information of the railway vehicle, the speed signal, the door opening/closing information, and the optical sensor output signal. Since the luminous intensity is adjusted, it is possible to adjust the dimming intensity according to the driving position, time of day, weather, etc., and the content displayed on the display device 2 may be visible due to a decrease in contrast ratio due to external light, etc. This prevents the display from decreasing in brightness and enables display at appropriate brightness. In addition, since the dimming level is automatically switched, the burden on the crew is reduced.

In addition, since the condition calculation unit 11 has acquired the operation data, it is possible to appropriately adjust the light at a point such as a tunnel where the light should be adjusted. Furthermore, since the condition calculation unit 11 has acquired information regarding the running speed of the railway vehicle, it is possible to calculate the distance from the station, for example, and it is possible to easily detect the point where the light should be adjusted. Furthermore, position detection means such as GPS is not required.

Furthermore, since the condition calculation unit 11 has acquired the door opening/closing signal, it is possible to detect the departure or stop of the railway vehicle based on the door opening/closing signal.

Further, since the display device 2 is provided on the door, various information can be displayed at a position that catches the attention of passengers.

Further, since the display section 21 is constituted by an EL display, it is a self-luminous display means and does not require a backlight or the like, and the display section 21 can be constructed thinly.

In addition, in the embodiment mentioned above, not only the display device 2 but also the display control device 1 was provided in the door part, but a configuration as shown in FIG. 3 may be used. In the configuration shown in FIG. 3, the door section 100 is provided with a display device 2 and a second control device 1b. The first control device 1a shown in FIG. 3 is provided inside the railway vehicle other than the door portion 100.

In FIG. 3, the operation data storage section 12, display control section 13, and dimming control section 14 are the same as those described in FIG. The first condition calculation unit 11a of the first control device 1a performs control equivalent to the condition calculation unit 11 explained in FIG. That is, the flowchart in FIG. 2 is executed. The second condition calculation unit 11b of the second control device 1b receives information regarding display control (display content, etc.) and information regarding dimming control (degree of dimming, etc.) transmitted from the first condition calculation unit 1a, and displays the information. It is output to the control section 13 and the dimming control section 14.

The configuration shown in FIG. 3 allows the second control device 1b provided in the door 100 to have a minimum configuration, so the second control device 1b can be miniaturized and can be easily placed inside the door. becomes. Further, the first control device 1a can also control a plurality of display devices 2.

Further, in the above-described embodiment, the distance from the station is determined by detecting that the door is closed using the door opening/closing signal, but departure from the station may be detected using other methods. For example, a change in speed from 0 km/h may be detected. In this case, a door opening/closing signal is not required.

Further, in the above-described embodiment, the display device 2 is provided in the door, but the display device 2 is not limited to the door, and may be provided in the window in the passenger room. Furthermore, by providing the display device 2 in a window or the like provided in front of the driver's cab, it can be used like a head-up display.

Note that the present invention is not limited to the above embodiments. That is, those skilled in the art can implement various modifications based on conventionally known knowledge without departing from the gist of the present invention. Of course, such modifications fall within the scope of the present invention as long as they still have the configuration of the display control device of the present invention.

1 Display control device 11 Condition calculation unit (driving environment acquisition unit, control unit)
12 Operation data storage section (operation information)
2 Display device 21 Display section 22 Light control section

Claims (3)

In a display control device that controls a display device configured by overlapping a light control section and a display section provided in a window opening of a moving body,
a driving environment information acquisition unit that acquires driving environment information of the mobile object;
a control unit that controls the degree of dimming of the light control unit based on the driving environment information acquired by the driving environment information acquisition unit;
Equipped with
The display device is provided on the door part,
The traveling environment information acquisition unit acquires door opening/closing information indicating opening/closing of the door, operation information of the mobile object, and information regarding the traveling speed of the mobile object,
The control unit controls the degree of dimming of the light control unit based on the door opening/closing information, the operation information, and the information regarding the traveling speed.
A display control device characterized by: The driving environment information acquisition unit acquires detection information of an optical sensor that detects brightness outside the mobile object,
The control unit controls the degree of dimming of the light control unit based on the detection information of the optical sensor.
The display control device according to claim 1 , characterized in that: 3. The display control device according to claim 1 , wherein the display section is comprised of an electroluminescent element.

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