JPH0249637A - Liquid crystal display wristwatch equipped with energometric function - Google Patents

Abstract

PURPOSE:To dispense with a special examination machine at the time of shipment examination by providing a pulse measuring test mode for detecting a change of external light for turning a pulse detection pattern ON and OFF at a predetermined cycle and displaying the turning ON/OFF number of times per min other than a usual pulse measuring mode. CONSTITUTION:A liquid crystal panel 2 is provided with a pulse detection pattern 2c other than a time display part 2a and a calendar display part 2b and a photoreflector 3 being an optical pulse sensor is arranged to the under surface of the pulse detection pattern 2c. When a pulse measuring function mode is selected by the operation of a switch button 4, the photoreflector 3 arranged to the under surface of the pulse detection pattern 2c detects the turning ON/OFF number of times being a cycle of a change of the external light due to the turning ON/OFF of the pulse detection pattern 2c and displays the turning ON/OFF number of times per a min, that is, performs the same display as pulse measurement. By repeating the turning ON/OFF of the pulse detection pattern 2c at a definite cycle, pulse function is examined on the basis on whether a predetermined number of pulses are displayed. Therefore, the examination number of times are reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a structure that facilitates a pulse function test of a liquid crystal display wristwatch with a pulse measurement function having an optical pulse sensor.

[Conventional technology]

2. Description of the Related Art Recently, multi-functional wristwatches, especially digital display watches, have been commercialized, which have various built-in sensors and display predetermined functions based on their functions. One of them is a multifunctional wristwatch that displays pulse rate. There are several types of pulse measurement methods of this type, and one that has been commercialized is an optical pulse measurement method that detects pulses by capturing changes in light caused by blood flow. This optical pulse measurement method uses a phototransistor or the like as a pulse sensor, and the pulse sensor is placed at a position away from the digital display. Then, the pulse rate is measured by placing the fingertip on the top surface of the pulse sensor through a windshield or another piece of glass that covers the pulse sensor. On the other hand, when products having such a pulse measurement function are shipped, the pulse measurement function is inspected, but conventionally this has been done using an inspection machine having a light source that blinks at a predetermined period.

[Problem to be solved by the invention]

However, if a liquid crystal display wristwatch incorporates an optical pulse sensor and a pulse measurement function is added, a shipping inspection process for the pulse function becomes necessary. Moreover, as mentioned above, to test the pulse measurement function, use a testing machine with a light source that flashes at a predetermined period, set the light source and pulse sensor so that they correspond, and check the flashing period of the light source. This is done by detecting whether or not a predetermined pulse rate is displayed. Therefore, a special inspection machine is required, and there is a problem in that it takes time to send the watch to the inspection machine.

The present invention aims to solve the above-mentioned conventional problems and provide a liquid crystal display wristwatch with an optical pulse function that does not require a special inspection machine during shipping inspection.

[Means to solve the problem]

In order to achieve the above object, the present invention has the following configuration. That is, the liquid crystal display wristwatch with an optical pulse measurement function according to the present invention has an optical pulse sensor disposed below the liquid crystal display panel, a pulse detection pattern on the liquid crystal display panel that overlaps with the optical pulse sensor, and a pulse detection pattern that is similar to the normal one. In addition to the pulse measurement mode, there is a pulse measurement test mode in which changes in external light are detected by blinking the pulse detection pattern at a predetermined period, and the number of blinks per minute is displayed.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a plan view of a liquid crystal display wristwatch with a pulse measurement function showing an embodiment of the present invention. In the figure, 1 is the windshield glass, 2
2 is a liquid crystal panel arranged on the lower surface of the windshield 1, and the liquid crystal panel 2 is provided with a pulse detection pattern 2c in addition to a time display section 2a and a calendar display section 2b. As shown, a photoreflector 6, which is an optical pulse sensor, is arranged. 4.5.
6.7 is a switch button.

In Figure 1, it is Thursday, July 14th, 12:34:56 PM.
Displaying seconds.

FIG. 2 is a sectional view taken along line II in FIG. The liquid crystal panel 2 includes an upper glass 2d, a lower glass 2e, an upper polarizing plate 2f, and a lower polarizing plate 2g. 8 is a circuit board, 9 is a circuit chip, and 10 is a circuit sealing frame, in which the circuit chip 9 is molded with resin IGa, and the plane and direction of the photoreflector B are positioned. 11 is a crystal oscillator, 12 is a capacitor which is a part of the circuit component, 16 is a battery, 14 is a battery press plate that supports the battery 16 and conducts the (+) pole with the circuit board 8, and 15 is a battery receiver. Spring connects circuit board 8 (-
) Conductivity is established between the poles. 16 is a frame member ■, 17
1 is a frame member (2), which positions and supports the liquid crystal panel 2, circuit board 8, battery 13, battery press plate 14, etc. 18 is a reflector with a notch 1 in the photoreflector part.
8a.

Figure 3 shows the state in which it is used for pulse measurement.
A) is immediately after the pulse measurement function mode is selected by operating the switch button 4. The pulse detection pattern 2C goes out, the photoreflector 6 becomes visible, and the calendar display section 2b shows "
-1” display will start blinking. FIG. 3(B) shows that by placing the finger 19 on the photoreflector O, the photoreflector 6 detects the change in X141 due to the blood flow of the person being measured.
The pulse rate is measured from the period, and the pulse rate 72 is displayed instead of "-1".

In FIG. 4, the pulse measurement test mode is selected by simultaneous operation of switch buttons 4 and 7, and the pulse detection pattern 2C flashes, alternating with the states shown in FIGS. 4(A) and 4(B). Now select the pulse measurement test mode using switch buttons 4 and 7.
Since this mode is unnecessary for the user, a special operation method is used so that it cannot be easily selected.

In FIG. 4 (A,), the pulse detection pattern 2c is turned off and the fourth
Figure (B) shows a state in which the pulse detection pattern 2c is lit. Therefore, the photoreflector 6 placed on the bottom surface of the pulse detection pattern 2c detects the number of blinks, which is the cycle of changes in external light due to the blinking of the pulse detection pattern 2c, and measures the number of blinks per minute, that is, the pulse rate measurement. It appears to have a similar display. Here, the pulse function is tested by repeating the blinking of the pulse detection pattern 2c at a constant cycle to see if a predetermined pulse rate (60 in FIG. 4) is displayed.

〔Effect of the invention〕

As is clear from the above explanation, according to the present invention, the pulse function of a liquid crystal display watch with a built-in optical pulse sensor and a pulse measurement function can be tested using an optical pulse sensor placed on the bottom surface of a specific display pattern of the liquid crystal panel. A sensor detects the cycle of changes in external light due to the blinking of the display pattern, and the number of blinks per minute is displayed. Therefore, it is possible to test the pulse rate function, a special function not found in conventional watches, without using a special testing machine. In addition, since no inspection machine is used, there is no need to spend time setting up the clock and inspection machine.
This reduces inspection man-hours.

Furthermore, conventionally, the pulse sensor has been placed in a position that avoids the LCD panel, which creates design constraints and increases the cost of the watch case. However, by placing the pulse sensor on the bottom surface of the LCD panel as in the present invention, design constraints and the cost of the watch case can be reduced. This has the effect of eliminating the need for an amplifier.

[Brief explanation of the drawing]

Figure 1 shows a pulse meter that is an embodiment of the present invention. ] A plan view of a functional liquid crystal display wristwatch, FIG. 2 is a sectional view taken along the line ■-■ in FIG. (A) and (B) are plan views showing one embodiment of the pulse measurement test mode. 2...Liquid crystal panel, 2c...Pulse detection pattern, 6...Photoreflector. Figure 3, flash

Claims (1)

[Claims] In a liquid crystal display wristwatch with a pulse measurement function, an optical pulse sensor such as a photoreflector is placed on the bottom of the liquid crystal panel.
A pulse detection pattern is provided on a liquid crystal panel portion covering the optical pulse sensor, and in addition to a pulse measurement mode in which the pulse detection pattern is turned off, the pulse is measured by placing a fingertip on the fingertip, and the pulse rate is displayed, a pulse measurement test mode is provided. A liquid crystal display wristwatch with a pulse measurement function, wherein the pulse detection pattern blinks at a predetermined cycle in the pulse measurement test mode, and the number of blinks per minute is displayed by detecting the blinking cycle.