JPH04284416A - Liquid crystal touch panel - Google Patents

Abstract

PURPOSE:To prevent the visibility, operability, and outer appearance of a liquid crystal display from deteriorating owing to reflected light and stains on the surface part of the liquid crystal touch panel. CONSTITUTION:In the liquid crystal touch panel 4 consists of a liquid crystal display means 4a which displays an image of plural operation keys and an operation detecting means 4b which detects the respective displayed operation keys being pressed, a nonglare film 4c is arranged on the surface part of the touch panel 4.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a television monitor,
The present invention relates to a liquid crystal touch panel used as an operation means in various electronic devices such as a disc player, a VTR, and an air conditioner.

0002

2. Description of the Related Art In recent years, devices equipped with liquid crystal touch panels as operating means have been widely put into practical use. For example, generate a specific command signal in response to a pressed operation key,
In a remote commander that converts this command signal into an infrared signal using a light emitting diode and outputs it, the command signal can be supplied to electronic equipment such as a monitor device located at a remote location to perform various operations. In addition to configuring the operation keys as a keyboard with a plurality of press switches, there are also known devices in which some or all of the operation keys are configured as a touch panel operation section using an LCD display screen and a touch sensor.

0003

[Problem to be Solved by the Invention] In the case of a liquid crystal touch panel, operation keys are displayed on the LCD display screen,
When you press the surface of the LCD display screen according to the display of this operation key, the touch sensor detects which part of the LCD display screen was pressed, and an operation signal corresponding to the pressed position, that is, the operation key displayed at that pressed position However, since the surface of the LCD display screen is a glass panel, the light from the indoor light may be reflected on the glass panel surface, and oil components such as finger marks may adhere to the glass panel surface due to the pressing operation. However, there were problems in terms of operability and appearance, such as making the liquid crystal display difficult to see and damaging the appearance.

0004

[Means for Solving the Problems] The present invention has been made in view of the above problems, and provides a liquid crystal display means for displaying images of a plurality of operation keys, and each operation key displayed by the liquid crystal display means. In a liquid crystal touch panel comprising an operation detection means capable of detecting a pressing operation, a non-glare film is disposed on the surface of the touch panel.

[0005]

[Operation] By pasting a non-glare film on the surface of the touch panel that has been treated to have a rough surface, the light that enters the touch panel is diffusely reflected by the uneven surface, and it also attracts dirt from your hands. I won't.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a perspective view showing the appearance of an embodiment of a remote commander using a liquid crystal touch panel of the present invention, and FIG. 2 is an exploded perspective view thereof. The remote commander of this embodiment is especially a remote commander for a television monitor, but in addition to television monitors, it can also be used to remotely control various AV devices such as multi-disc players, VTRs, DAT players, tuners, main amplifiers, etc. It is designed to be able to do the following.

In FIGS. 1 and 2, reference numeral 1 denotes a remote commander main body, which is made up of an upper case 1a and a lower case 1b assembled with screws N. Reference numeral 2 designates an infrared light transmitting unit that converts a command signal generated as an electric signal into infrared light using a light emitting diode and outputs it, and reference numeral 3 (3a, 3b) represents an operation key constituted by a press switch. Note that 3a is a mode switching key for changing the operation mode for each electronic device that you want to operate, and 3b is a power key, volume key, and volume key used for normal operation of the television monitor device.
These are operation keys such as channel keys.

Reference numeral 4 denotes a touch panel operation section, and as can be seen from FIG. 2, this touch panel operation section 4 has a transparent touch panel switch 4b located on the upper surface of a liquid crystal display panel (LCD) 4a, and a non-glare film 4 on the upper surface.
c is attached and is configured to be exposed from the opening 1a1 of the upper case 1a via the frame-shaped cushion 4d.

The liquid crystal display panel 4a has a liquid crystal sealed between two glass substrates, and is further provided with a light distribution layer and transparent electrodes. In order to display various symbols, the transparent electrode is formed such that a common electrode and a fixed pattern electrode patterned in the shape of a predetermined display symbol face each other with the liquid crystal interposed therebetween.

In this liquid crystal display panel 4a, as symbols for displaying operation keys, frames indicating keys and various characters and figures displayed within the frames can be displayed, as shown in the plan view of FIG. By pressing any of the mode switching keys 3a to switch the compatible device mode, the necessary operation keys corresponding to the electronic device can be selectively selected from those shown in the touch panel operation section 4 in the figure. This is what is displayed. Note that there are many parts where multiple characters or figures are prepared within the frame of one key (for example, “
"VIDEO1" and "CLEAR" are provided in the same key frame), and one is also selectively displayed in each key frame based on the compatible device mode at that time.

For example, among the mode switching keys 3a, "" is used to switch to a mode corresponding to a multi-disc player.
When the "MDP key" is pressed, the touch panel operation section 4 displays operation keys 4k necessary for various operations of the multi-disc player, as shown in FIG. 4(a).

Similarly, when the "MONITOR key" corresponding to the monitor device is pressed among the mode switching keys 3a, the touch panel operation section 4 displays the following information as shown in FIG. 4(b).
Operation keys 4k necessary for various operations of the monitor device are displayed. In addition, “MONI” of the mode switching key 3a
TOR/TUNER key” “VTR1/2/3 key” “CD key” “AMP key” “DAT key”
Similarly, the operation keys 4k necessary for the respective compatible devices are displayed for the "OPTION key" and "OPTION key". Note that the "OPTION key" is used by the user arbitrarily setting the target electronic device and necessary operation keys.

The transparent switch section 4b, which is superimposed on the liquid crystal display panel 4a as shown in FIG. A contact is provided that closes when the In the remote commander 1 of this embodiment, the liquid crystal display panel 4a as a display means and the transparent switch part 4b as an operation detection means allow various operation keys on a so-called touch panel, which are operated by pressing the surface of the display part, to be operated. provided. By switching the corresponding device mode as described above, it is possible to output an infrared command signal corresponding to each device such as a multi-disc player or a VTR.

A system block provided in the remote commander of this embodiment for realizing operations such as outputting an infrared command signal is configured as shown in FIG. 5, for example. 10 is a main CPU that controls the output operation of infrared command signals and the liquid crystal display operation based on operation signals from the operation keys 3a, 3b or the transparent touch panel 4b (operation key 4k); This is a sub CPU that controls storage/read operations of data (command signals). 10a and 11a are each main C
This is a clock generator for the PU 10 and sub CPU 11. 1
2a is RAM from the address data from the sub CPU 11
12 shows an address decoder that generates read/write addresses for 12. Note that 12b is a backup battery for the RAM 12.

Further, 13 is a backlight unit for liquid crystal display, 14 is an oscillator, and 15 is an LCD driver. When performing liquid crystal display on the liquid crystal display panel 4a,
The main CPU 10 controls the lighting operation of the backlight unit 13, generates an operating clock from the oscillator 14, and displays the LCD driver 15 on the liquid crystal display panel 4a as shown in FIGS. 3, 4(a) and 4(b). Executes a predetermined display operation. Of course, this display is controlled to change in accordance with the operation of the operation key 3a, as described above.

Further, when the operation key 3b or the operation key 4k on the transparent touch panel 4b is operated, the main CPU 10 causes the sub CPU 11 to read a command signal corresponding to the operated key from the RAM 12, and is supplied to the infrared transmitting section 2, which converts it into infrared light and outputs it.

Furthermore, 16 is an infrared receiver that receives infrared signals from other remote commanders, 17 is a photoamplifier that amplifies the command signal received by the infrared receiver 16 and converted into an electrical signal, and 18 is the obtained This is a waveform shaping circuit that shapes the waveform of a command signal and supplies it to the sub CPU 11.

That is, when a command signal is input from the infrared receiver 16 while this system is in the learning mode, the command signal is activated by corresponding to a predetermined operation key 4k under the control of the main CPU 10 and sub CPU 11. The command signal is registered in the RAM 12, and when the operation key 4k corresponding to the command signal is subsequently pressed, the command signal is read out from the RAM 12 and outputted from the infrared transmitter 2 as an infrared signal. In other words, this operation allows the remote commander to support various electronic devices whose command signals themselves have different formats.

Reference numeral 19 denotes an electronic sound generating section, which generates an electronic sound when, for example, an infrared command signal is output from the infrared transmitting section 2, or when a certain command signal is registered by the operation in the learning mode, etc. An electronic sound is generated under the control of the main CPU 10. This electronic sound allows the user to confirm the operation execution of the remote commander.

In the remote commander of this embodiment configured as described above, the touch panel operation section 4 is configured as described above.
, a non-glare film 4c is attached to the top surface of the transparent touch panel switch 4b, that is, the top surface of the touch panel operation section 4 is made of the non-glare film 4c, so that when the user presses the operation key 4k on the touch panel operation section 4, will touch the surface of the non-glare film 4c.

As shown in a partial cross-sectional view in FIG. 6, the non-glare film 4c has an uneven surface treated so that the light incident on the touch panel operation section 4 is diffusely reflected and therefore directly directed to the user's eyes. The reflected light component is greatly reduced. Further, due to the surface irregularities, dirt such as hand marks hardly adheres to the surface of the touch panel operation section 4. Therefore, in this embodiment, the liquid crystal display will not become difficult to see due to hand marks or reflected light, and the operability will not deteriorate, and the appearance will not deteriorate due to dirt on the surface of the touch panel operation section 4.

Although this embodiment has been described with reference to a case where a liquid crystal touch panel is mounted on a remote commander of an AV device, the present invention is applicable to a liquid crystal touch panel mounted as an operating means for any device.

[0023]

Effects of the Invention As explained above, the liquid crystal touch panel of the present invention has a non-glare film disposed on the surface of the touch panel, which reduces reflected light and prevents dirt such as finger marks from adhering to the liquid crystal touch panel. The display is always easy to see, which improves operability, and also prevents deterioration of appearance due to dirt on the surface of the touch panel.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the invention.

FIG. 2 is an exploded perspective view of this embodiment.

FIG. 3 is an explanatory diagram of operation keys provided on the touch panel operation section of this embodiment.

FIG. 4 is an explanatory diagram of operation key displays on the touch panel operation section of the embodiment.

FIG. 5 is a system block diagram of the remote commander of this embodiment.

FIG. 6 is an explanatory diagram of the non-glare film of this example.

[Explanation of symbols]

4 Touch panel operation section 4a Liquid crystal display panel 4b Transparent touch panel switch 4c Non-glare film

Claims (1)

[Claims] 1. A liquid crystal touch panel comprising: a liquid crystal display means for displaying images of a plurality of operation keys; and an operation detection means capable of detecting that each operation key displayed by the liquid crystal display means has been pressed. A liquid crystal touch panel characterized in that a non-glare film is placed on the surface of the touch panel.