WO2012118142A1

WO2012118142A1 - Display device

Info

Publication number: WO2012118142A1
Application number: PCT/JP2012/055211
Authority: WO
Inventors: 八木　健
Original assignee: 株式会社ニコン
Priority date: 2011-03-02
Filing date: 2012-03-01
Publication date: 2012-09-07
Also published as: JP2012181419A

Abstract

Provided is a display device having a display unit that performs display using light emitting elements, wherein the display device is provided with a transparent cover member that seals the display unit, and a translucent liquid material that has optical properties in correspondence with to the transparent cover member and that is enclosed in the space formed by the transparent cover member and the display unit.

Description

Display device

The present invention relates to a display device.
This application claims priority based on Japanese Patent Application No. 2011-045034 for which it applied on March 2, 2011, and uses the content here.

In recent years, a display device that is installed on a street and displays information (for example, a moving image for advertisement) provided by a provider (for example, an advertising agent) is known (for example, see Patent Document 1).
As such a display device, for example, a method of displaying a color image using a plurality of sub-pixels arranged in a matrix is known. As such a display device, a configuration in which LEDs of three colors of R (red), G (green), and B (blue) are respectively emitted as sub-pixels is known (for example, see Patent Document 2).

JP 2010-185962 A Special table 2008-047862

By the way, the display device may be used outdoors such as a soccer stadium, for example, but it is conceivable that a soccer ball collides with the display device during a competition at a position adjacent to the competition ground of the soccer stadium. However, since the display surface of the conventional display device does not have a structure that can withstand such a strong pressure, the LED may be damaged and display failure may occur.

An aspect of the present invention aims to provide a display device having excellent resistance to external pressure applied to the display surface.

The display device according to the aspect of the present invention includes a transparent cover member that seals the display unit and an optical characteristic corresponding to the transparent cover member in a display device that includes a display unit that performs display using a light emitting element. And a translucent liquid material sealed in a space formed by the transparent cover member and the display unit.

In the above aspect, the light emitting element may be a light emitting diode.

In the above aspect, a liquid storage mechanism may be provided that can store a part of the translucent liquid material through a communication path that communicates with the space.

In the above aspect, the liquid storage mechanism includes a storage portion that can store the translucent liquid material, and a closing valve that can close the communication path that connects the storage portion and the space. The valve may store the translucent liquid material overflowing from the space by opening the communication path when the pressure in the space becomes a predetermined value or more.

In the above aspect, when the light-transmitting liquid material overflows from the space into the housing portion, a replenishment mechanism for replenishing the light-transmitting liquid material in the space may be provided.

In the above aspect, at least one of the liquid storage mechanism and the replenishing mechanism may include a pressure measuring unit that measures the pressure of the space.

According to the aspect of the present invention, it is possible to provide a display device having excellent resistance against external pressure applied to the display surface.

Sectional drawing which shows schematic structure of a display apparatus. The top view which shows schematic structure of a display apparatus. The figure for demonstrating the effect | action of a display apparatus.

Hereinafter, embodiments of the display device according to the present invention will be described. In the following drawings, in order to make each component easy to see, the scale of the size may be varied depending on the component.

FIG. 1 is a cross-sectional configuration diagram showing an example of the configuration of a display device 100 according to an embodiment of the present invention. As shown in FIG. 1, the display device 100 includes an element substrate 10, a cover substrate (transparent cover member) 20 disposed to face the element substrate 10, and between the element substrate 10 and the cover substrate 20 (hereinafter referred to as a substrate). And a matching oil 30 sandwiched between 10 and 20).

The element substrate 10 has a display unit 15 that can display a desired image. The display unit 15 includes subpixels arranged in a matrix in a planar view on the base material 10a constituting the element substrate 10, and these subpixels have three colors (for example, R (red) and G (green)). And B (blue)) light emitting diodes (LEDs, light emitting elements) 11 are formed. The display unit 15 is connected to a drive circuit (not shown), and various images can be displayed by selectively lighting the LEDs 11 with the drive circuit.

The cover substrate 20 is for sealing at least the display unit 15 of the element substrate 10 and is constituted by a transparent cover member. As the cover substrate 20, for example, an acrylic plate or tempered glass is used. The surface of the cover substrate 20 constitutes a display surface 20a that displays the image of the display unit 15 facing the outside.

In the present embodiment, a transparent member is used as the cover substrate 20, but the transparent member in the present invention can transmit an image displayed on the display unit 15 to the extent that the display quality of the display unit 15 is not impaired. Also included are members with a degree of coloring or coating. As an example of the coloring or coating, a UV coat layer for protecting the display unit 15 can be exemplified.

The matching oil 30 is made of a translucent liquid material having optical characteristics corresponding to the cover substrate 20. The matching oil 30 is sealed between the

substrates

10 and 20 at a predetermined pressure. As described later, when an external pressure (impact) is applied to the display surface 20a, the matching oil 30 is dispersed and uniformed. It can be transmitted to the display unit 15 provided inside.

Here, the translucent liquid material having optical characteristics corresponding to the cover substrate 20 is composed of a liquid (including a gel) having the same refractive index as that of the cover substrate 20, and the image light from the display unit 15 is obtained. It means that it can be transmitted.

The matching oil 30 is preferably optically transparent, but black display by the display unit 15 may be enhanced by adding black paint. The matching oil 30 is sealed in a space K formed between the element substrate 10 and the cover substrate 20 by a sealing member 12 disposed so as to surround the display unit 15.

Since the matching oil 30 has the same refractive index as that of the cover substrate 20 as described above, the image light from the display unit 15 is not refracted at the boundary portion with the cover substrate 20. As a result, the cover substrate 20 prevents the occurrence of problems such as distorting the image displayed by the display unit 15 due to the difference in refractive index, and a clear image can be displayed, so that a good display quality can be obtained. ing.

The display device 100 according to the present embodiment is preferably used as an advertising display unit adjacent to a competition ground of a soccer stadium, for example, in an environment where external pressure may be applied to the display surface 20a.

In such a place adjacent to the competition ground, the soccer ball may collide with the display surface 20a of the display device 100, and local external pressure may be applied to the display surface 20a. At this time, according to the display device 100 according to the present embodiment, the external pressure applied to the display surface 20a can be made uniform (distributed) by the action of the matching oil 30 sealed in the space K between the

substrates

10 and 20. it can. Thereby, it can relieve | moderate that the strong pressure is locally applied to the display part 15, and generation | occurrence | production of the malfunction that the display part 15 is damaged by external pressure can be prevented.

FIG. 2 is a plan view showing a schematic configuration of the display device 100, and FIG. 3 is a diagram for explaining the operation of the display device 100.
As shown in FIG. 2, an oil storage mechanism (liquid storage mechanism) that can store the matching oil 30 on the side surface of the display device 100 via a communication path 42 that communicates with a space K in which the matching oil 30 is sealed. 40.

The oil storage mechanism 40 is provided in the oil storage tank 41, an oil storage tank (storage unit) 41 that can store the matching oil 30, a communication path 42 that connects the oil storage tank 41 and the space K, and the oil storage tank 41. And a closing valve 43 that can close the communication passage 42.

The communication path 42 is composed of a tubular member. As shown in FIG. 3, the shutoff valve 43 is applied when an external pressure is applied to the display surface 20 a so that the pressure in the space K containing the matching oil 30 in the display device 100 is equal to or higher than a predetermined threshold value (upper limit value). The matching oil 30 overflowing from the space K by opening the communication passage 42 can be stored in the oil storage tank 41. Here, the upper limit value of the pressure in the space K at which the closing valve 43 opens is defined based on a value that is equalized by the matching oil 30 and may cause damage to the display unit 15.

When the matching oil 30 overflowing from the space K is stored in the oil storage tank 41, the amount of the matching oil 30 sealed in the space K is insufficient. Thus, when the amount of the matching oil 30 is insufficient, the pressure in the space K becomes low. Therefore, when the external pressure is applied again to the display surface 20a, the external pressure cannot be made uniform as described above, and the display unit 15 is damaged. There is a fear.

On the other hand, the display device 100 according to the present embodiment has an oil replenishment mechanism (a replenishment mechanism) that replenishes the space K with the matching oil 30 when the matching oil 30 overflows from the space K to the side surface as shown in FIG. ) 50.

The oil replenishment mechanism 50 includes a tank 51 that stores the matching oil 30 to be replenished, a pump 52 that supplies the matching oil 30 from the tank 51 to the space K, a communication path 53 that connects the tank 51 and the space K, And a sensor (pressure measurement unit) 54 capable of detecting the pressure in the space K.

The oil replenishment mechanism 50 detects the internal pressure in the space K by the sensor 54, and drives the pump 52 when the pressure in the space K exceeds the upper limit, that is, when the matching oil 30 overflows from the space K, As shown in FIG. 3, the matching oil 30 stored in the tank 51 is supplied into the space K.

Note that the oil replenishing mechanism 50 supplies the matching oil 30 while measuring the pressure in the space K by the sensor 54. Thereby, it is possible to prevent the matching oil 30 from being supplied excessively in the space K.

As described above, the oil replenishing mechanism 50 replenishes the matching oil 30 that is insufficient in the space K, so that even when the external pressure is applied to the display surface 20a again, the external pressure is made uniform and the display unit 15 is prevented from being damaged. It is like that.

As described above, according to this embodiment, since the matching oil 30 is sealed between the

substrates

10 and 20, for example, a soccer ball in a game collides with the display surface 20a of the display device 100, and the display surface 20a Even when the external pressure is applied locally, the external pressure applied to the display surface 20a can be made uniform by the action of the matching oil 30. Thereby, the pressure applied to the display part 15 can be relieved and it can prevent that the display part 15 is destroyed by external pressure.

In addition, since the display device 100 includes the oil storage mechanism 40, when a very strong external pressure is applied to the display surface 20a and the pressure in the space K exceeds a predetermined threshold, the closing valve 43 is opened and matching in the space K is performed. The oil 30 can escape to the oil storage tank 41.

Therefore, as compared with the configuration in which the matching oil 30 cannot escape to the oil storage tank 41, the pressure increase in the space K can be suppressed and the display unit 15 can be prevented from being damaged.

Furthermore, since the display device 100 includes the oil replenishing mechanism 50, when the matching oil 30 is stored in the oil storage tank 41 from the space K as described above, the pump 52 is driven to supply the matching oil 30 to the space K. Can be replenished.

Therefore, the oil replenishing mechanism 50 can maintain the pressure in the space K at a predetermined pressure by replenishing the matching oil 30 in the space K, and even when the external pressure is applied to the display surface 20a again, the pressure is made uniform. It is possible to prevent the display unit 15 from being damaged.

Further, since the matching oil 30 has the same refractive index as that of the cover substrate 20, the image of the display unit 15 is prevented from being refracted and distorted at the boundary portion of the cover substrate 20, and the image is clear. Good display quality can be obtained.

In addition, this invention is not limited to the said embodiment, In the range which does not deviate from the meaning of invention, it can change suitably.

For example, although the case where the oil replenishing mechanism 50 includes the sensor 54 that detects the pressure in the space K has been described in the above embodiment, the oil storage mechanism 40 may include the sensor 54. In this case, the pump 52 of the oil replenishing mechanism 50 is driven based on the pressure signal detected by the sensor 54. The oil storage mechanism 40 may be configured to control the opening / closing of the closing valve 43 based on the detection signal of the sensor 54. The sensor 54 may be provided in each of the oil storage mechanism 40 and the oil replenishment mechanism 50.

In the above embodiment, the case where the display device 100 is used as an advertising display unit of a soccer stadium has been exemplified, but the application of the display device 100 according to the present invention is not limited to this.

For example, by arranging the display device 100 on the floor of a pool, the present invention can be applied to a use in which a user (swimmer) can swim while viewing a desired image. In this case, the display device 100 is waterproofed at least on the display surface side.

The display device 100 arranged on the floor surface of the pool in this way may cause an impact on the display surface side by the user's feet when the user who is swimming stops halfway and stands on the floor surface. Moreover, since the water pressure is always applied to the floor surface of the pool by the water stored in the pool, the water pressure is also applied to the display surface 20a of the display device 100 arranged on the floor surface.

Even in such a case, according to the display device 100 of the present invention, as described above, the matching oil 30 sealed between the element substrate 10 and the cover substrate 20 acts locally on the display surface 20a. By equalizing the external pressure applied to the pressure, the pressure applied to the display unit 15 can be reduced. Therefore, the display device 100 of the present invention is effective even when the display device 100 is arranged on the floor surface of a pool that may receive a local external pressure on the display surface 20a.

Note that the display device of the present invention may be installed in a conventional display device, for example, because it may be subject to external pressure locally other than the above-described display unit for advertising in a soccer stadium or a display unit installed on the bottom of a pool. It can be used in various difficult places.

K ... space, 11 ... LED (light emitting diode, light emitting element), 15 ... display unit, 20 ... cover substrate (transparent cover member), 30 ... matching oil (translucent liquid material), 40 ... oil storage mechanism (liquid storage) Mechanism), 41 ... oil storage tank (storage unit), 42 ... communication path, 43 ... blocking valve, 50 ... oil replenishment mechanism (replenishment mechanism), 54 ... sensor (pressure measuring unit), 100 ... display device

Claims

In a display device having a display portion that performs display using a light emitting element,
A transparent cover member for sealing the display unit;
And a translucent liquid material having optical characteristics corresponding to the transparent cover member and sealed in a space formed by the transparent cover member and the display unit.
The display device according to claim 1, wherein the light emitting element is a light emitting diode.
The display device according to claim 1, further comprising a liquid storage mechanism capable of storing a part of the translucent liquid material via a communication path communicating with the space.
The liquid storage mechanism includes a storage portion that can store the translucent liquid material, and a closing valve that can close the communication passage that connects the storage portion and the space.
The display according to claim 3, wherein when the pressure in the space becomes equal to or greater than a predetermined value, the blocking valve opens the communication path and stores the translucent liquid material overflowing from the space in the storage portion. apparatus.
The display device according to claim 4, further comprising a replenishment mechanism that replenishes the space with the light-transmitting liquid material when the light-transmitting liquid material overflows from the space to the housing portion.
6. The display device according to claim 4, wherein at least one of the liquid storage mechanism and the replenishing mechanism includes a pressure measuring unit that measures the pressure of the space.