JP4913022B2 - Liquid crystal display - Google Patents

Description

  The present invention relates to a liquid crystal display device in which a liquid crystal display unit is used as a display unit, such as a remote control device.

  For example, a kitchen remote controller provided in the kitchen to control the operation of a hot water supply device is equipped with an intercom function to display visitors, or to provide a TV function and display a TV image. There is known a liquid crystal display provided with a liquid crystal display.

  Thus, the liquid crystal display part of the kitchen remote controller provided in the kitchen is exposed to oily smoke and the like, and the surface is likely to become dirty. In particular, in the case where a touch sensor is attached to the surface of the liquid crystal display unit and the touch sensor is pressed with a finger and operated by a remote control, the surface of the liquid crystal display unit tends to become dirty.

As a means of wiping and cleaning the surface of the touch sensor type liquid crystal display unit, a switch to shift to the cleaning mode is provided on the surface of the liquid crystal display unit, and when the switch is pressed, input from the touch sensor is not accepted for a predetermined time. A liquid crystal display unit that can clean the surface is known (see, for example, Patent Document 1).
JP 2004-334762 A (Claim 1)

  The dirt adhering to the surface of the liquid crystal display unit may be caused by dust adsorbed on the entire liquid crystal surface by static electricity. In addition, when used in a kitchen or the like as described above, or when a touch sensor is attached to the surface, dirt or oil causes dirt.

  If dust is attached, the dust is whitish, and the darker the display on the liquid crystal display unit, the easier it is to identify the dirt. Conversely, when dirt or oil is attached, the brighter the liquid crystal display part, the easier it is to identify the dirt. That is, since the screen that easily cleans dust is different from the screen that easily cleans dirt such as hand dust, the above-mentioned conventional apparatus has a problem in that it cannot efficiently wipe off all types of dirt.

  In view of the above problems, an object of the present invention is to provide a liquid crystal display device having a cleaning mode that is easy to clean against all types of dirt.

In order to solve the above problems, a liquid crystal display device according to the present invention includes a liquid crystal display unit including a backlight, a control unit that controls display contents of the liquid crystal display unit and controls lighting of the backlight, and a control unit. An operation unit for inputting an operation signal to the liquid crystal display unit as a cleaning mode for the surface of the liquid crystal display unit when an operation signal by a predetermined operation on the operation unit is input to the control unit. A pattern in which the area of the dark area and the area of the dark part are substantially the same is displayed, and the bright part and the dark part are inverted every predetermined time .

  White dirt such as dust is easy to identify when the liquid crystal display is dark. Black stains such as dirt are easy to identify when the LCD is bright. Therefore, if the liquid crystal display unit is inverted in brightness, both white and black stains can be identified, and the surface of the liquid crystal display unit can be reliably wiped off.

  The front of the liquid crystal display may be brightened or darkened at the same time, but if the entire screen of the liquid crystal display is reversed in a light and dark state, the user will have an illusion that the liquid crystal display has failed. May occur. In such a case, in the cleaning mode, a pattern in which the area of the bright part and the area of the dark part are substantially the same may be displayed on the liquid crystal display unit, and the bright part and the dark part may be reversed every predetermined time. . If the pattern is displayed, the user can determine that the pattern displayed on the liquid crystal display unit is intentional and prevent the illusion that a failure has occurred.

In order to solve the above problems, another liquid crystal display device according to the present invention includes a liquid crystal display unit including a backlight, a control unit that controls display contents of the liquid crystal display unit and controls lighting of the backlight. An operation unit that inputs an operation signal to the control unit, and when an operation signal by a predetermined operation on the operation unit is input to the control unit, the control unit displays a liquid crystal display as a cleaning mode of the surface of the liquid crystal display unit. A striped pattern consisting of a bright part and a dark part is displayed on the part, and the striped pattern is moved .

  As is apparent from the above description, the present invention reverses the display state of the liquid crystal display unit in the cleaning mode every predetermined time, so that all kinds of dirt can be easily identified. Any dirt adhering to the surface of the can be reliably cleaned.

  Referring to FIG. 1, reference numeral 1 denotes a kitchen remote controller which is an example of a liquid crystal display device according to the present invention. The kitchen remote controller 1 is attached to the wall surface of the kitchen and controls the operation of a hot water supply device (not shown). In the present embodiment, the kitchen remote controller 1 is connected to a bathroom remote controller or an intercom device, and has a function of having a conversation with a bather in the bathroom or a visitor at the front door in response to a call from the bathroom remote controller or an entrance unit. is doing.

  A liquid crystal display unit 2 is provided on the front surface of the kitchen remote controller 1. The liquid crystal display unit 2 is provided with a backlight at the back, and the backlight is turned on when characters or images are displayed on the liquid crystal display unit. Both the lighting control of the backlight and the display control to be displayed on the liquid crystal display unit are performed by a control unit built in the kitchen remote controller 1. In the present embodiment, when a touch sensor is further attached to the surface of the liquid crystal display unit 2 and the user touches an icon displayed on the liquid crystal display unit 2 with a fingertip or the like, a signal specifying the selected icon is transmitted to the control unit. It is comprised so that it may be input.

  Switches and the like are provided below the liquid crystal display unit 2, and in addition to touching and operating the surface of the liquid crystal display unit 2, a signal may be input to the control unit by pressing these switches 3.

  In the present embodiment, a cleaning icon 21 is displayed on the liquid crystal display unit 2, and when the icon 21 is touched, a signal is output from the touch sensor, and the control unit detects that the cleaning icon 21 is touched. I did it. In addition, in the case where the touch sensor is attached to the surface of the liquid crystal display unit 2 as in the present embodiment, the touch sensor may be configured to be switched to the cleaning mode by touching the icon 21. In the kitchen remote control of the type that is not attached to the part 2, a dedicated switch for shifting to the cleaning mode may be provided in addition to the switch 3, or the existing switch 3 may be operated by simultaneous multiple presses or long presses. You may make it switch to cleaning mode.

  When a signal indicating that an operation for shifting to the cleaning mode has been performed is input to the control unit by any of the above operations, the control unit shifts to the cleaning mode for a predetermined time and then returns to the normal operation mode. did.

  When the mode is shifted to the cleaning mode, for example, as shown in FIG. 2, the display of the liquid crystal display unit 2 is repeatedly displayed every predetermined time in a bright state where nothing is displayed and a dark state where nothing is displayed. In the dark state display shown in the lower side of FIG. 2, the display of the liquid crystal display unit may be darkened as shown in the figure with the backlight on, but the backlight is turned off. It may be in a dark state.

  As shown in FIG. 2, when the entire screen of the liquid crystal display unit 2 is in a bright and dark state as shown in FIG. 2, the user may have broken down the kitchen remote controller 1 when the screen is switched to the cleaning mode. There is a risk of the illusion of being. For this reason, the display when the mode is shifted to the cleaning mode is uniform over the entire surface, and some pattern or the like may be displayed.

  For example, as shown in FIG. 3, the display of the liquid crystal display unit 2 may be a checkered pattern composed of a bright part and a dark part, and the bright part and the dark part may be inverted in light and dark every predetermined time. The light / dark reversal may be reversed at once, but the light / dark reversal may be gently reversed.

  In the case of displaying a pattern as shown in FIG. 3, a striped pattern is displayed as shown in FIG. 4, and the bright part and the dark part are not reversed on the spot, but partially reversed. The striped pattern may appear to move up and down by shifting.

  In each of the above embodiments, when a predetermined time elapses after shifting to the cleaning mode, it automatically returns to the original operation mode, but when the return timing approaches, the cycle of light / dark reversal is shortened and the mode is You may comprise so that it may alert | report that a return is approaching.

  In addition, this invention is not limited to an above-described form, You may add a various change in the range which does not deviate from the summary of this invention.

The figure which shows the structure of one embodiment of this invention First form displayed on liquid crystal display unit Second form displayed on the liquid crystal display unit Third form displayed on the liquid crystal display unit

Explanation of symbols

1 Kitchen remote control 2 Liquid crystal display 3 Switch 21 Icon

Claims (3)

A liquid crystal display unit having a backlight, a control unit for controlling display contents of the liquid crystal display unit and controlling the lighting of the backlight, and an operation unit for inputting an operation signal to the control unit. When an operation signal by a predetermined operation is input to the control unit, the control unit displays a pattern in which the area of the bright part and the area of the dark part are substantially the same on the liquid crystal display part as a cleaning mode of the surface of the liquid crystal display part And a bright portion and a dark portion are inverted every predetermined time . 2. The liquid crystal display device according to claim 1, wherein the pattern is a striped pattern, and the striped pattern appears to move in the vertical direction . A liquid crystal display unit having a backlight, a control unit for controlling display contents of the liquid crystal display unit and controlling the lighting of the backlight, and an operation unit for inputting an operation signal to the control unit. When an operation signal by a predetermined operation is input to the control unit, the control unit displays a striped pattern composed of a bright part and a dark part on the liquid crystal display unit as a cleaning mode of the surface of the liquid crystal display unit, and the striped pattern is displayed. A liquid crystal display device characterized by being moved .

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