JPH0256592A - Electronic equipment with liquid crystal display elements - Google Patents

Abstract

PURPOSE:To evade the influence of heat generated by a light emitting element upon liquid crystal by forming cuts which are in the shapes of parts of circles or ellipses in flanks. CONSTITUTION:The liquid crystal 16 is fitted to a printed board 21 for control in parallel, the light emitting element 19 is fitted at right angles to the printed board 21 for control, and an optical waveguide 17 is provided between them. Then the light from the light emitting element 19 is reflected by part 68 of its ellipse or circle to illuminate the liquid crystal 16 and the heat generated by the light emitting element 19 is radiated from the cuts 62 and 63 using parts 68 of the ellipses or circles provided to the flanks 65 and 66. Consequently, the influence of the heat generated by the light emitting element 19 upon the liquid crystal 16 can be evaded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an optical waveguide provided between a liquid crystal display element and a light emitting element for illuminating the liquid crystal display element, and particularly relates to an optical waveguide provided between a liquid crystal display element and a light emitting element for illuminating the liquid crystal display element. The present invention relates to a structure in which light from a light emitting element can be guided to a liquid crystal display element, and the heat generated by the light emitting element does not affect the liquid crystal display element.

2. Description of the Related Art Structures in which a liquid crystal display element is illuminated with a light emitting element are already in practical use in audio equipment and the like. An example will be explained with reference to FIG. 47 is a transparent or semi-transparent liquid crystal display element (
Hereinafter referred to as liquid crystal. ), 48 is a light emitting element, 49 is a control printed circuit board, 5o is an optical waveguide for guiding the light of the light emitting element 48 to the liquid crystal 4a, and 60 to 61 are heat radiation ports for radiating the heat of the light emitting element 48. .

The optical waveguide 50 is attached to the control printed circuit board 49 using the convex portions 51 to 5 attached to the light emitting element 48.
2 is fitted into the four parts 53-54 formed in the optical waveguide 50, and then the protrusions 55-56 of the optical waveguide 50 are fitted into the recesses 57-58 of the control printed circuit board 49 and fixed with solder.

Problem to be Solved by the Invention However, with the above configuration, as shown in FIG.
must always be mounted vertically, and the light emitting element 48 must be located directly below the liquid crystal 47. Therefore, this control printed circuit board 49 cannot be installed only in a direction parallel to the user, making it difficult to attach liquid crystals with light emitting elements for illumination to various products, and the fact that the heat dissipation of the light emitting elements 48 affects the liquid crystal 47. The challenge was to give.

Means for Solving the Problems The present invention solves the above-mentioned conventional problems, and provides an electronic device having a shape using a part of an ellipse or a circle, and having a cut in the shape of a part of the ellipse on the side surface. The purpose is to provide

In order to achieve the purpose described in "Function", an electronic device having a liquid crystal of the present invention has a liquid crystal mounted in parallel on a control printed circuit board,
The light emitting element is mounted perpendicularly to the control printed circuit board, and an optical waveguide is provided between them, and a part of the ellipse or circle reflects the light from the light emitting element to illuminate the liquid crystal, and a part of the ellipse or circle provided on the side The heat generated by the light-emitting element is released by using a portion of the light-emitting element.

EXAMPLE Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 shows a leading waveguide according to an embodiment of the present invention, and FIG. 2 shows a configuration of an optical waveguide according to an embodiment of the present invention, which is attached to a control printed circuit board. Here, the optical waveguide is as shown in Figure 1.
Claw parts 1 to 6 for fixing the liquid crystal display element to the second surface 64
It also has claw parts 7 to 10 and 14 to 15 on the lower surface 67 for fixing itself to the control printed circuit board, and further has fixing parts 11 to 1 of the lamp P plate to which the light emitting element is attached.
3 and further reflects the light emitted from the light emitting element +f
+164, side surfaces 65-66, bottom surface 67, spheroid 1Ti
(Circular) part 6B, and also has a hole 69 that illuminates the liquid crystal with light reflected from each part.

The pawls 1 to 6 provided on the upper surface of the leading waveguide in FIG. 1 are provided to fix the liquid crystal display element 16. As shown in FIG. 2, the liquid crystal display element 16 is first fixed by pawls 1 and 2, then fixed by pawls 3 and 4, and then fixed by pawls 5 and 5.
It is fixed at ~6.

The pawls 5 and 6 also serve to prevent the legs 25 of the liquid crystal display element from being deformed.

The liquid crystal display element 16 is fixed in the y-axis direction by the claws 1.2.6.7. Next, the attachment of the light emitting element will be described. First, a heat lamp or the like is used as the light emitting element 19, and is soldered to the control printed circuit board 21.
Put the sewing machine [25] in 1. Also, the printed circuit board 21
A flat cable 20 is used for the electrical connection method.

After having such a configuration, the lamp P plate 18 is connected to the optical waveguide 1.
7, the lamp P plate 18 is cut out from the control printed circuit board 21 along the perforations 25. and,
The lamp P plate 18 is fixed to the optical waveguide 17, and the method of fixing it will be described below. First, the perforation 25 is configured with dimples 26 and 27 (.And, when attaching the optical waveguide 17 to the lamp P plate, dimples 11 and 12 are also provided at position 13. 11.1
Fix the lamp P plate with steps 2 and 26 and 27.

Further, the height of the lamp P plate 18 is set higher than the height of the leading waveguide 17 and fixed. The method for fixing the liquid crystal display element 16 and the lamp P+Ji 18 to the leading waveguide 17 has been described above.
The method of fixing to 1 will be described. First, a convex portion 27.2 is provided on the leading waveguide 17, and a concave portion 22.23 is provided on the control printed circuit board 21. Further, holes 24 are provided in the control printed circuit board 21 for mounting the legs 25 of the liquid crystal display element 16. At the same time, the legs 25 of the liquid crystal display element 16 are attached to the holes 24, and the convex portions 28 and 29 of the optical waveguide are attached.
into the recesses 22 and 23 of the printed circuit board. Then, the legs 25 of the liquid crystal display element 16 are connected to the control printed circuit board 21.
Solder. Also, a pawl 7 is attached to the bottom of the optical waveguide 17.
．． 8.14.15 are provided so that the direct optical waveguide does not touch the soldered parts of the control printed circuit board 21. Under such a configuration, the light emitted from the light emitting element 19 of the lamp P plate 18 is reflected by the eight portions 29 of the leading waveguide 17 and illuminates the liquid crystal display element 16, which is a +14 component.

In addition, the heat emitted from the light emitting element 19 is transferred to the heat radiation port 62.6.
3 is emitted to the outside, and does not affect the liquid crystal display element 16.

Next, a method for driving the light emitting element 19 when a liquid crystal having a light emitting element for illumination as described above is attached to a high frequency heating device will be described. FIG. 3 shows a block diagram of the control section of the high-frequency heating device of this embodiment. In the figure, 30 is a microcomputer (hereinafter referred to as a microcomputer), to which a CPU (central information processing unit) 30-2 is connected via approximately 110 (manual power, output section) 30-1, and a ROM (read-only Ifl memory) is connected to this. A device) 30-4 and a RAM (a storage device that can read and write) 30-3 are connected. Furthermore, the microcomputer 30 has a heating start switch 3.
2a, a cancel switch 32b, a cooking menu selection switch 32C, a time setting switch 32d, 32c, and 32f. Furthermore, a high frequency generating means 34, a liquid crystal display element 35, and a light emitting element 33 for illuminating the liquid crystal display element 35 are connected.

On the other hand, the ROM section 30d of the microcomputer 30 includes the input section 3.
When a predetermined heating function is selected from 2, the function is to perform a predetermined heating that matches this function. Further, the ROM section 30d of the microcomputer 30 is provided with the function of counting the time signal taken in through the pulse generating circuit 31 and measuring the heating time. Also, the ROM section 30d of the microcomputer 30
, the values such as the heating function and heating time set in a predetermined input section are stored in the RAM section 30c, and the liquid crystal display element 3 is stored in the RAM section 30c.
5 has the function of displaying its contents. Furthermore, the ROM section 30d of the microcomputer 30 has a cancel switch 32b.
When is pressed, the contents stored in the RAM section 30c are erased, and when the heating switch 3251 is pressed, the contents stored in the RAM section 30c are erased.
Based on the contents stored in 30c, the high frequency generating means 3
4 to start heating, and further to control the high frequency generation means 34 based on the separately measured heating time. Further, the ROM section 30d of the microcomputer 30 stores information about the progress of the heating content being progressed on the liquid crystal display element 35 after the start of heating, for example, the set heating time ++ 'i
It has the function of subtracting and displaying the value as time passes.

Furthermore, the ROM section 30d of the microcomputer 30 stores information about the microcomputer 30 when in a mode other than all-off or clock adjustment mode.
It has the function of outputting an ACTUE signal to the output port R1 connected to. FIG. 4 shows the flowchart.

FIG. 5 shows a driving circuit for a light emitting element. First, AC power is taken in through a low-voltage transformer 40, and a desired power line 42 is formed by a half-wave rectifier circuit 41.

A coil section 43 of a relay for outputting the high frequency generating means 34 is connected to this power supply line, and a transistor 44 is also connected thereto. This transistor 44
is connected to the output port R1 of the microcomputer 30. Further, the transistor 44 is connected to a so-called latch circuit 45.

A transistor 46 is connected to the output port Ro,
A light emitting element 59 is interposed between the transistor 46 and the power supply line 42.

Under the above configuration, when the cooking menu key is selected and input in the input unit 32, the microcomputer 30 operates to
The ACT I VE signal is output to the RO port, the transistor 46 is turned on, and the light emitting element 59 lights up.

Effect of the invention As described above, according to the present invention, the following effects can be obtained.

(1) By using a split P plate structure for the light emitting element, costs are reduced and workability is improved.

(2) The optical waveguide also serves as a stopper for the display element, making it easy to work with.

(3) When mounting a control printed circuit board using the backlight configuration of the present invention, space is saved and the practicality is extremely high.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an optical waveguide according to an embodiment of the present invention, FIG. 2 is an exploded perspective view showing how to mount the optical waveguide on the control unit printed circuit board 21, and FIG. 3 is an exploded perspective view showing the same configuration. FIG. 4 is a flowchart showing the configuration of a part of the ROM of the control unit with the same configuration, and FIG. The circuit diagram shown in FIG. 6 is an exploded perspective view showing a conventional leading waveguide and its mounting method on a control printed circuit board. 16.35...Liquid crystal display element, 17...
・Optical waveguide, 19.33...Light emitting element, 22~
23... Optical waveguide fixing hole, 24... Display element fixing hole, 30... Microcomputer, 32... Input section. Name of agent: Patent attorney Shigetaka Awano Haka 1/6
- Display element 19 - Light-emitting element light guide 5IL word fig. fig. 3θ

Claims (1)

[Claims] an input means for inputting data consisting of functional information and numerical information; a semi-transmissive or transmissive liquid crystal display element having display areas for each of the functional information and numerical information; and a light emitting device for illuminating the liquid crystal display element. an optical waveguide for guiding light from the light emitting element to the liquid crystal display element, the input means, the liquid crystal display element, and a control section for controlling the light emitting element, and the optical waveguide rotates. An electronic device having a liquid crystal display element having a shape using a part of an elliptical or spherical surface and having a hole in the side surface.