JPS62124591A - Display function check device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a display function checking device that automatically determines whether or not the display function of an electronic device such as a tuner is normal.

[Prior Art and Its Disadvantages] In an electronic device, for example, a tuner 1 as shown in FIG.
It has a display section consisting of 12..., and when each switch is pressed, the display section of the corresponding combination lights up.

Conventionally, in order to automatically check the display function of the tuner 1, a combination of a robot or an air cylinder and a television camera has been considered.

However, these methods have the disadvantage that the cost of configuring the system is high.

[Object of the Invention] The present invention has been made in view of the above-mentioned circumstances, and its purpose is to provide an inexpensive display function checking device that can automatically check the display function of an electronic device such as a tuner.

[Summary of the Invention] The present invention provides a method for determining whether or not the display function of an electronic device that has a light emitting display section consisting of a plurality of pushbutton switches and a plurality of light emitting elements that each emit light when the pushbutton switches are operated is normal. The display function checking device includes: a pushbutton switch drive section comprising a plurality of plungers arranged to turn on and off a pushbutton switch of the electronic device; The present invention is a display function checking device that includes a light receiving section including a light receiving element, and a control section that receives an output signal from the light receiving section and determines whether or not the display state of the light emitting display section is normal.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows the overall configuration of a display function checking device 2 for checking the display function of the tuner 1 shown in FIG. 5 as a sample. In the figure, a plurality of plungers 22, 22... are arranged on the base plate 21, and a plurality of CDS cells 2 are arranged opposite to these plungers 22, 22...
3.23... are arranged. These CDS cells 2
3, 23... are fixed to the base plate 21 via the light receiver fixing plate 24 with light receiver fixing fittings 25. The plungers 22, 22... are connected to the pushbutton switches 11, 11-... of the tuner 1, respectively, and the CDS cells 23, 23-..., respectively.
... are positioned to face the display sections 12, 12, ..., respectively. These plungers 22.22...
・A pushbutton switch drive unit consisting of a CDS cell 23
The light receiving section consisting of . . . 23 is covered with a light shielding cover 26 to prevent malfunction due to external light. A limit switch 27 is provided at the end of the row of plungers 22, 22, to detect whether or not the tuner 1 is set at an appropriate position. Further, a stopper 28 is provided on the base plate 21 to position the tuner 1 in the lateral direction.

FIGS. 2 and 3 are enlarged views of a pair of plungers 22 and CDS cell 23 indicated by A in FIG. 1, respectively. In the figure, the plunger 22 is formed by screwing an L-shaped metal fitting 33 onto the shaft 32 of a DC solenoid 31, and a polycap 34 is attached to the tip of this L-shaped metal fitting 33. That is, when a current flows through the DC solenoid 31, the shaft 32 is drawn in, thereby moving the L-shaped fitting 33 in the direction shown by the arrow in FIG.
As a result, the LED 12 of the tuner 1 corresponding to the switch 11 lights up.

Therefore, the light is transmitted to the LED 12 facing the LED 12
The light enters the DS cell 23, and the resistance value of this CDS cell 23 decreases. At this time, since the detection bandwidth of the CDS cell 23 is wide, light from any color of LED can be detected.

The light reception signal of the CDS cell 23 is sent to the control section 29, and the control section 29 determines whether the correct location on the display section of the tuner 1 is lit. If the correct location is not lit, that is, the display function of the tuner 1 fails, the check is interrupted midway, and the buzzer 30 generates an intermittent sound to notify the outside. Also, if the correct location is lit, that is, the test passes, proceed to the next item. When all the items have been checked, it is determined that the display function of the tuner 1 is normal, and the buzzer 30 generates a continuous sound to notify the outside.

FIG. 4 shows a circuit diagram of the control section 29. As shown in FIG. That is, the signals from the above-mentioned CDS cells 23, 23, .・Logic circuit 4 consisting of AND OR circuit 42
Sent to 3. The output signal of the logic circuit 42 is sent to the inverting circuit 4.
The signal is sent to one input terminal of an AND circuit 44 via 4a, and is also sent to the other input terminal of an AND circuit 45. A pulse signal from a pulse generating circuit 46 is input to the other input terminals of the AND circuits 44 and 45, respectively. The output signal of the AND circuit 45 is sent to an intermittent sound generation circuit 47, and a drive signal is sent from the intermittent sound generation circuit 47 to the buzzer 30 described above. The output signal of the AND circuit 44 is sent to the pulse generating circuit 46 via the delay circuit 48, and is also sent to the counter 49.
is sent to the clock terminal. Furthermore, the output terminal of the AND circuit 44 is connected to a power source E via a start switch 50. The output signal of the counter 49 is sent to a display section 51 and a decoder 52 having output terminals 1 to n. A power source E is connected to each reset terminal of the decoder 52 and the counter 49 via a limit switch 27.

Further, the output signals of each stage of the decoder 52 are transmitted to the plunger drive circuit 5 through a diode matrix circuit 53, respectively.
4, and the plunger drive circuit 54 sends drive signals to the plungers 22, 22, . . . , respectively, and the buzzer 3
A drive signal is sent to 0.

Next, the operation of this control section 29 will be explained.

First, when tuner 1 is not set on base plate 2I,
The counter 49 has been reset by the limit switch 2f. When the tuner 1 is set, the limit switch 27 is automatically opened and the reset is canceled, and when the start switch 50 is pressed, the pulse from the pulse generation circuit 4B is input to the counter 49.
As a result, "1" is displayed on the display section 51, and the voltage at the output terminal 1 of the decoder 52 becomes r HJ (+15V
') becomes. Then, this voltage is applied to the plunger drive circuit 54, and as a result, the plunger 22 operates, and its L-shaped metal fitting 33 pushes the corresponding push button switch 11 of the tuner 1.

As a result, the LE corresponding to this pushbutton switch 11
D12 lights up. The light from this LED 12 is detected by the opposing CDS cell 23, and the output signal of this CDS cell 23 is sent to the comparator 40. The comparator 40 outputs a signal of rHJ (+15V) when the CDS cell 23 is lit, and outputs a signal of rLJ (OV) when the CDS cell 23 is not lit. The data from the comparator 40 and the data output from the diode matrix circuit 53 are compared in the logic circuit 43,
When the two match, the output becomes rLJ, and when they do not match, the output becomes rHJ. On the other hand, since the pulse generating circuit 4G generates a pulse immediately after the plunger 22 is driven (approximately 1 second later), in the case of a pass, the output of the logic circuit 43 is r
LJ, which is inverted by the inverting circuit 44a and input to the AND circuit 44. Therefore, AND circuit 44
A pulse is generated at the output of the counter 49, and this pulse is input to the counter 49. As a result, the display section 51 of the counter 49 displays “
2" is displayed, and the output 2 of the decoder 52 is rH.
J, and automatically proceeds to the next step. In the case of failure, the output of the logic circuit 43 becomes rHJ, and therefore a pulse is generated at the output of the AND circuit 45, which is input to the intermittent sound generating circuit 47, and as a result, the buzzer 30 emits an intermittent sound.

When all the steps pass, the output n of the decoder 52 becomes rHJ, so the continuous sound generation circuit 55 is driven and the buzzer 30 generates a continuous sound. This allows the operator to know that the display function of the tuner 1 is normal. In addition, if a lamp is displayed along with the buzzer 30,
Judgments can be made more clearly.

Incidentally, in the above embodiment, the case where the present invention is used as a check device for the tuner 1 has been described, but it goes without saying that the present invention can be applied as a check device for display functions in other electronic devices.

[Effects of the Invention] As described above, according to the present invention, it is possible to automatically check the display function of a tuner, etc. without using a conventional system that combines a television camera, etc. A display function check device can be provided.

[Brief explanation of drawings]

1 is a partially exploded perspective view showing the overall configuration of a display function check device according to an embodiment of the present invention; FIG. 2 is an enlarged perspective view showing main parts of the device shown in FIG. 1; The figure is a side view, FIG. 4 is a diagram showing the circuit configuration of the control section in FIG. 1, and FIG. 5 is a perspective view showing the tuner.・
...Control unit, 31...DC solenoid, 33...L
Glyph metal fittings.

Claims (1)

[Claims] In a display function checking device for determining whether or not the display function of an electronic device having a plurality of pushbutton switches and a light-emitting display section consisting of a plurality of light-emitting elements each of which emits light when the pushbutton switches are operated is normal or not, the electronic A pushbutton switch drive unit, which is arranged to face each pushbutton switch of the device and is composed of a plurality of plungers that turn the switches on and off; The light-receiving unit includes a plurality of light-receiving elements that receive light from the light-emitting elements, and a control unit that receives an output signal from the light-receiving unit and determines whether the display state of the light-emitting display unit is normal. A display function check device characterized by: