JPH0655190U - Effect imparting device - Google Patents

Abstract

(57) [Summary] [Purpose] In an effect imparting device for imparting an effect to a generated musical sound, it is possible to switch the viewing angle characteristics of a display device by an extremely simple operation even if the playing posture changes. [Configuration] A switch 23 switches the reference voltage supplied to the driver 22 to either _one of the voltages V ₁ and V ₂ . The voltages V ₁ and V ₂ are set in advance so as to correspond to the drive voltage for optimally displaying the LCD 21 with respect to the line-of-sight direction in the upright / seated state. Therefore, the performer can obtain the optimum display by one switch 23 even if the playing posture changes.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an effect imparting device including an LCD (liquid crystal display device).

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, there has been known an effect imparting device that intentionally imparts an effect such as reverb (reverberation) or distortion (distortion) to a generated musical sound of an electric guitar or the like. Such an effect imparting device is often equipped with a plurality of operators and switches for setting various parameters related to the effect, and an LCD for displaying these setting states in real time. This is because the LCD as a display device has excellent advantages such as low power consumption, large capacity display capability, and low cost.

As is well known, an LCD, particularly a simple matrix type LCD, has stripe electrodes in the X and Y directions formed on two substrates, and the intersections thereof serve as pixels. Then, the X-direction electrodes are sequentially scanned line by line, and the signal voltage corresponding to the scanned electrodes is applied to the Y-direction electrodes according to the selected / non-selected pixels, thereby displaying an arbitrary display. It can be performed.

It is known that such an LCD has the following characteristics. The ratio (contrast) between the brightness of the selected pixel and the brightness of the non-selected pixel decreases as the number of scan side electrodes increases. The contrast characteristic and the viewing angle characteristic depend on the effective value of the drive voltage applied to the selected / non-selected pixels. For this reason, an LCD that displays a large capacity (the number of electrodes on the scanning side is large) is often provided with a viewing angle adjusting volume for changing the driving voltage. By adjusting this volume, the observer can always obtain a display that is easy to see in the direction of the line of sight.

[0005]

[Problems to be solved by the device]

 By the way, when applying the effect to the generated musical sound of an electric guitar or the like, the performer may select the effect or make various settings in the upright state or the sitting state. For example, in the upright state, the effect imparting device body is installed on the floor, and the performer operates the foot switch with his / her foot to make various selections regarding the effect, while in the seated state. There is a case in which the effect applying device is placed on the table and the volume is finely operated by hand to finely set the effect.

In such a case, as shown in FIGS. 3A and 3B, in the upright / seated state, the player's line of sight b ₁ / b ₂ and the normal line a of the LCD provided in the effect imparting device. The viewing angles φ ₁ / φ ₂ formed by and are different from each other. Therefore, there is a problem that the performer needs to adjust the viewing angle adjustment volume in order to make the displayed contents easy to see each time the playing posture is changed.

The present invention has been made in view of the above-mentioned problems, and its object is to make the viewing angle characteristic of the display device extremely simple even when the playing posture changes such as in the upright state or the sitting state. It is to provide an effect imparting device that can be switched by various operations.

[0008]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention is provided with a plurality of operators and a liquid crystal display device capable of adjusting a viewing angle for performing various displays, and gives an effect based on a setting state of the plurality of operators to a generated musical sound. In the effect imparting device, the selecting means for selecting any one of a plurality of predetermined positions and the controlling means for controlling the viewing angle characteristic of the liquid crystal display device according to the selection result of the selecting means. It is characterized by having.

[0009]

[Action]

 According to the above configuration, the viewing angle characteristic of the liquid crystal display device changes for each position selected by the selection means. Therefore, by assigning a position of the selection means for each possible viewing angle, it is possible to make the liquid crystal display device optimally display at the viewing angle by selecting the selection means.

[0010]

【Example】

 An embodiment according to the present invention will be described below with reference to the drawings. First, the electrical configuration of the effect imparting device 1 according to this embodiment will be described with reference to FIG. In this figure, 10 is a CPU, which controls each part connected via a bus. Reference numeral 11 denotes a ROM, which stores a control program used in the CPU 10, data for automatic performance, and the like. A RAM 12 temporarily stores registers used in the CPU 10 and various data.

Reference numeral 13 denotes a panel switch group, which is composed of a plurality of switches, a volume and the like for setting various control data and various parameters relating to effects. These setting states are the panel switch I. The data is supplied to the CPU 10 via the F (interface) 14 and the bus. Reference numeral 15 denotes a foot switch group, which is provided with a foot switch for switching between valid and invalid effects corresponding to each effect. As with the panel switch group 13, the setting states of these switches are the same as those of the foot switch I.D. It is supplied to the CPU 10 via the F16 and the bus.

Reference numeral 17 denotes a tone generator circuit, which generates various musical tone signals under the control of the CPU 10. Reference numeral 18 is an A / D converter, which converts an external input signal (analog) into digital. As the external input signal, for example, a signal of a musical tone generated by an electric guitar or the like is used. An effect applying circuit 19 applies various effects to the tone signal by the tone generator circuit 17 and an external input signal via the A / D converter 18 under the control of the CPU 10.

The signal to which the effect is added is converted into an analog signal by the D / A conversion unit 20 and output as an external output signal of the effect applying device 1. Then, this external output signal is sounded by a sound system (not shown) which is connected to the effect adding device 1 and is composed of an amplifier, a speaker and the like.

Reference numeral 21 is a simple matrix type LCD, and 22 is a driver (driving circuit) thereof. The driver 22 generates and supplies a signal to each electrode in the X and Y directions of the LCD 21 based on the display information supplied from the CPU 10 via the bus. As a result, each pixel of the LCD 21 is selected or deselected based on the display information, and matrix display is performed.

Further, either the voltage V ₁ or the voltage V ₂ is switched and supplied to the driver 22 by the switch 23, and is used as a reference voltage for determining the drive voltage to the LCD 21. Here, the voltages V ₁ and V ₂ are preset so as to satisfy the following conditions. That is, this condition means that when the driver 22 uses the voltage V ₁ / V ₂ as the reference voltage, it supplies the LCD 21 with a drive voltage that maximizes the contrast in the direction of the line of sight b ₁ / b ₂ (see FIG. 3). ,. The relationship between the drive voltage and the voltage V ₁ / V ₂ as the reference voltage is, for example, when the LCD 21 is driven by the voltage averaging method, the voltage V ₁ / V ₂ and the control in the line of sight b ₁ / b ₂ direction. The drive voltage that maximizes the last is equal to each other. The voltages V ₁ and V ₂ can be reset by a semi-fixed volume control (not shown) or a program so that they can respond even if the performer changes and the viewing angle changes.

Next, the external configuration of the effect imparting apparatus 1 will be described with reference to FIG. As shown in this figure, the following is provided on the front surface of the effect imparting device 1. That is, on the front, there are a switch group 13a, an operator group 13b for setting parameters of the distortion effect, an operation group 13c for setting parameters of the reverb effect, a foot switch 15b for the distortion effect, a foot switch 15c for the reverb effect, And a display surface of the LCD 21.

Here, the switch group 13a, the operator group 13b and the operator group 13c correspond to the panel switch group 13 in FIG. 1, and the foot switches 15b and 15c correspond to the foot switch group 15 in FIG. To do. The player can enable / disable the corresponding effect by stepping on these foot switches, and can finely adjust each effect by finely adjusting the corresponding control group. ing. For example, adjustment of the TONE knob in the operator group 13b changes the tone color in the distortion effect, and adjustment of the TIME knob in the operator group 13c changes the reverberation time in the reverb effect. Since the details of these manipulator groups are not directly related to the present invention, the description thereof will be omitted.

Further, an input terminal 18a for receiving an external input signal, an output terminal 20a for outputting an external output signal, and a switch 23 are attached to the back surface of the effect imparting apparatus 1, and the input terminal 18a is designated by A in FIG. The input terminal of the / D conversion section 18 and the output terminal 20a are connected to the output terminal of the D / A conversion section 20 in FIG. The switch 23 is a slide type and can be switched to either left or right.

Next, the operation of this embodiment will be described. First, when the effect applying device is powered on, the CPU 10 performs initialization processing to clear the RAM 12 and write initial values to various registers and flags. Then, the CPU 10 reads the setting states of the panel switch group 13 and the foot switch group 15 at predetermined intervals, and performs various processes based on the setting states. Examples of such various processes include a process of reading performance data from the ROM 11 and supplying it to the tone generator circuit 17 to generate a musical tone signal based on the performance data, and a setting state and a foot by each operator group. There is a process of giving an effect based on the validity / invalidity of the switch to the tone signal by the tone generator circuit 17 and the external input via the A / D converter. Further, the CPU 10 supplies the setting states of the panel switch group 13 and the foot switch group 15 to the driver 22 as display information, thereby causing the LCD 21 to display the setting states. At this time, if the voltage V ₁ is selected by the switch 23, the contrast in the direction of the line of sight b ₁ is maximized on the LCD 21, while if the voltage V ₂ is selected, the contrast in the direction of the line of sight b ₂ is increased. It will be the maximum.

According to this embodiment, when the foot switch for the corresponding effect is enabled, the effect corresponding to the operation amount of the corresponding operation group is input via the external input terminal 18a. The signals and the musical tone signals generated by the tone generator circuit 17 from the ROM 11 based on the automatic performance data are added to the signals. Further, according to this embodiment, the optimum contrast with respect to the line-of-sight direction can be obtained by one switch 23, so that the playing posture changes from the sitting state to the upright state and vice versa. However, the display content of the LCD 21 can be instantly observed in an optimal state for that posture. In addition, in the above-described embodiment, the switch 23 is an alternative, but it may be a type in which one of a plurality of switches is selected.

[0021]

[Effect of device]

 According to the invention described above, the viewing angle characteristic of the liquid crystal display device changes for each position selected by the selection means. Therefore, by allocating the position of the selection means for each possible viewing angle, it becomes possible to perform the optimum display for the liquid crystal display device at the viewing angle by selecting the selection means. Can be switched by an extremely simple operation.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an effect imparting device according to an embodiment of the present invention.

FIG. 2 is a plan view showing a configuration of an operation portion in the embodiment.

3A is an explanatory diagram of a viewing angle φ ₁ , and FIG. 3B is an explanatory diagram of a viewing angle φ ₂ .

[Explanation of symbols]

10 ... CPU, 11 ... ROM, 12 ... RAM, 1
3 ... Panel switch group, 15 ... Foot switch group,
19 ... Effect applying circuit, 21 ... LCD, 22 ...
… Driver, 23… switch

Claims (1)

[Scope of utility model registration request] 1. An effect imparting device comprising a plurality of manipulators and a liquid crystal display device capable of adjusting a viewing angle for performing various kinds of display, and imparting an effect based on a setting state of the plurality of manipulators to a generated musical sound. An effect imparting means, comprising: a selection means for selecting any one of the plurality of selected positions, and a control means for controlling the viewing angle characteristic of the liquid crystal display device according to the selection result of the selection means. apparatus.