KR20010018755A - display unit for microwave ovens - Google Patents

Abstract

PURPOSE: A microwave oven displayer is provided to transmit light to the LCD(liquid crystal display) uniformly by improving the structure of the display unit showing the state of the microwave oven. CONSTITUTION: A display device is composed of a circuit board(31) having a control unit; an LCD(32) showing the state of the microwave oven by the control unit; an LED(light emitting diode)(330) opposite to the both rear sides of the LCD emitting the light by the signal from the control unit; a semitransparent member between the LED and the LCD and transmitting the light of the LED to the LCD while having the light transmissivity in the center portion from the opposite portion to the LED; and a holder member supporting the LCD and the semitransparent member, and having a light transmitting passage(361) transmitting the light from the LED to the entire LCD. An LSI(large scale integration)(31a) generates the magnetron to cook food in the cooking chamber on selecting a mode. The LED installed in the both sides of the circuit board emits the light to the LCD by the LSI. The light is transmitted to the center portion of the LCD through the light transmitting passage in an LCD holder(360), and an acrylic member is mounted between the LCD and the LCD holder. The acrylic member is getting thinner to the center portion of the LCD and transmits the light through the acrylic member to the entire LCD uniformly.

Description

Display unit for microwave ovens

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave oven, and more particularly, to a display apparatus for a microwave oven which displays various states of control of various operations of a microwave oven.

As shown in FIG. 1, in a conventional microwave oven, a cooking chamber (not shown) is formed in the main body 10 for cooking various foods, and a front of the main body selectively opens and closes the cooking chamber which is an inner space thereof. The door 20 is hinged (not shown) is coupled.

In addition, the upper part of the main body 10 which is the upper side of the door is provided with a discharge grill 11 so that various odors and smoke generated through the inside can be discharged to the outside, the front side of the main body has a user The display device 30 is mounted to display a current state and the like so that the control state can be easily understood, and to be operated by a user to control cooking of various foods.

The display apparatus is mounted on a frame 12 constituting the main body 10 and includes a circuit board 31 provided with a large scale integration 31a to perform various controls, and a user controls various control states. It is largely composed of a liquid crystal display 32 for displaying the current state and the like for easy understanding.

In addition, a light emitting diode 33 is mounted at one side of the circuit board to illuminate the LCD 32 so that the user can easily recognize various types of information displayed on the LCD. A diffuse sheet 34 is in close contact with each other so that various states of the 32 can be displayed smoothly.

An acryl member 35 is closely attached to the rear surface of the diffusion member so as to appropriately adjust the brightness of the light transmitted to the LCD 32. An LCD holder 36 is mounted on the circuit board to seat the acryl member 35. The LCD, the diffusion member, the LCD holder and the like are supported by the LCD cover 37 to prevent the flow thereof.

At this time, the LCD holder is formed on the rear surface of the acrylic member 35 while forming a predetermined space so that the light transmission passage (36a) to transmit the light generated from the LED 33 to the entire portion of the LCD (32).

In addition, a cushion member 37a is mounted on the inner circumferential surface of the LCD cover 37, which is a portion in which the LCD cover and the LCD adhere to each other, thereby preventing damage caused by excessive adhesion of the LCD.

Therefore, when using a microwave oven according to a user's needs, first, food to be cooked by opening the door 20 of the main body 10 is put into a cooking chamber (not shown) inside the main body.

In such a state, the door 20 is closed again to seal the cooking chamber with respect to the outside of the main body 10, and then the display apparatus 30 is operated to perform selective operation control of the user.

That is, according to a control method for various cooking methods such as cooking time, cooking intensity, and the like, when the user selects a required mode (not shown), the LSI 31a which grasps this is controlled to generate electromagnetic waves to cook food in the cooking chamber. Will be performed.

At this time, the light emitting device 33 is caused to emit light under the control of the LSI 31a, so that various information such as the current cooking state is displayed through the LCD 32 receiving the light of the light emitting device so that the user can easily recognize the light. .

In addition, various odors and smoke generated while cooking food in the cooking chamber are guided to various air passages not shown and discharged to the outside through the discharge grill 11.

When the cooking is completed by the various processes as described above, the user opens the door 20 to take out the cooked food inside the cooking chamber, thereby completing all the processes.

On the other hand, the light emitting element 33 which illuminates the LCD 32 among the parts of the microwave oven which performs the above operation is provided with its position biased to one side of the circuit board, so that the opposite side from the side of the LCD is opposite. It transmits light toward you.

However, such a structure has a problem that the opposite side of the LCD 32, which is relatively far from the light emitting device, becomes darker than the side of the LCD located close to the light emitting device, thereby preventing a smooth display. Done.

Accordingly, in the related art, the thickness of the acrylic member 35 positioned at the rear of the LCD 32 to transmit light gradually becomes thinner from the position adjacent to the light emitting device to the opposite side thereof, and is transmitted to the overall LCD 32. The brightness of the light is uniformly adjusted.

However, considering that the trend of the general microwave oven is gradually increasing, the farther away from the light emitting device, the brightness of the light transmitted to the LCD is gradually reduced, so that the brightness of the entire display of the LCD is not the same. It caused a defect.

This problem is intensified gradually because the brightness control structure of the LCD, which has been applied to a microwave oven having a relatively small size, has been applied to a microwave oven, which is gradually increasing in capacity.

In order to solve the above problems, the brightness of the light emitting device may be further brightened, but this causes one side of the LCD in the vicinity of the light emitting device to be excessively bright, resulting in a problem in that the display is not smoothly made in this area. As it is, this too is impossible.

The present invention has been made in order to improve the above-described conventional problems, by improving the structure of the display device for controlling the various operations of the microwave oven and display various states can be made to constantly transmit the light to all parts of the LCD. The purpose is to make it.

1 is a perspective view showing a typical microwave oven.

Figure 2a is an exploded cross-sectional view showing a state where the display device of a typical microwave oven is disassembled.

Figure 2b is a sectional view of the main part showing a state in which a display apparatus of a typical microwave oven is assembled.

Figure 3a is an exploded cross-sectional view showing a disassembled state of the display device of the microwave oven according to the present invention.

Figure 3b is a sectional view of the main part showing a state in which the display device of the microwave oven according to the present invention is assembled.

Explanation of symbols on the main parts of the drawings

30: display device 330: light emitting element

350: acrylic member 360: LCD holder

361: light transmission path

According to a feature of the present invention for achieving the above object, the present invention provides a circuit board having a control unit for performing various controls, a liquid crystal display for displaying the current state of the microwave oven under the control of the control unit; A light emitting device installed at positions corresponding to both rear sides of the liquid crystal display and emitting light according to a signal of the controller, and installed between the light emitting device and the liquid crystal display to transmit light of the light emitting device to the liquid crystal display, A holder member having a translucent member having good light transmittance toward the center from a portion corresponding to the light emitting device, and a light transmitting path for supporting the liquid crystal display and the translucent member and transferring the light from the light emitting device to all parts of the liquid crystal display. It is configured to include.

The translucent member is formed such that its thickness decreases toward the center from a portion corresponding to the light emitting device.

The light transmission path formed in the holder member may be formed to be gradually inclined toward the side where the liquid crystal display is located toward the center side of the liquid crystal display in the same way as the shape of the translucent member.

Hereinafter, with reference to the accompanying Figures 3a and 3b showing an embodiment of the present invention in more detail as follows. The same as those of the prior art have been described with the same reference numerals.

3A is an exploded cross-sectional view illustrating a disassembled display device of the microwave oven according to the present invention, and FIG. 3B is a cross-sectional view of main parts illustrating the assembled display device of the microwave oven according to the present invention.

That is, the present invention is referred to as a light emitting device (hereinafter referred to as "LED") to emit light by receiving the signal of the circuit board on both sides of the circuit board 31 which is a side corresponding to the liquid crystal display (hereinafter referred to as "LCD") 32 330, respectively, and between the LCD and the circuit board, an acrylic member 350 is formed to be inclined so as to gradually decrease in thickness toward the center side of the LCD and the circuit board, and the acrylic member 350 and the circuit board 31 are mounted. LCD holder 360 formed with a light transmission path 361 to support the LCD 32 and the acrylic member 350 and to transmit the light emitted from the LED 330 to the entire portion of the LCD 32. ) By attaching.

On the other hand, instead of the acrylic member 350, it is also possible to use a member having a relatively good light transmittance toward the center. That is, for example, it is also possible to use those which can control the light transmittance by the properties of the film coated on the surface irrespective of the thickness.

In addition, the light transmission path 361 formed in the LCD holder is formed to be gradually inclined toward the side where the LCD 32 is located toward the center side of the LCD 32 in the same way as the shape of the acrylic member 350.

Such a configuration of the present invention is more preferable in order to obtain a more smooth performance to apply to a microwave oven having a relatively large size.

If described in more detail the operation according to the configuration of the present invention will be described later.

First, according to a control method for various cooking methods such as cooking time, cooking intensity, and the like, when the user selects a required mode, the LSI 31a which grasps this mode controls and generates a magnetron to perform food cooking in the cooking chamber.

In this process, the LED 330 emits light due to the control of the LSI 31a. At this time, the LEDs are installed at both sides of the circuit board 31, respectively, from both sides of the LCD 32. The light is transmitted towards you.

This light transmission is gradually concentrated to the center side of the LCD 32 through the light transmission path 361 formed in the LCD holder 360, wherein an acrylic member 350 is provided between the LCD and the LCD holder. As the acrylic member is formed such that its thickness decreases gradually toward the center of the LCD 32, light that passes through the acrylic member and illuminates the LCD 32 is directed toward the entire surface of the LCD 32. Uniform delivery can be achieved.

That is, in the vicinity of the LED 330 which is a relatively thick portion of the acrylic member 350, although the light generated by the light emission of the LED 330 is strong, a large amount in the process of passing through the acrylic member 350 On the contrary, although the light generated by the light emission of the LED is weaker as the distance from the LED 330 gradually decreases, the amount of light absorbed in the process of passing through the acryl member 350 becomes thin. You lose.

In this case, the shape of the LCD holder 360 is also inclined toward the LCD 32 as the light transmission path 361 toward the inner side is taken into consideration in consideration of the shape of the acrylic member. The light transmitted by the light guided by the light transmission path 361 of the LCD holder can be more smoothly delivered.

As described above, the present invention improves the liquid crystal display brightness adjusting structure of the microwave oven, so that even light can be transmitted to all parts of the liquid crystal display, thereby enabling the display to be smoothly performed.

Claims (3)

A circuit board having a control unit for performing various controls; A liquid crystal display for displaying the current state of the microwave oven under the control of the controller; A light emitting element installed at a position corresponding to both rear sides of the liquid crystal display and emitting light according to a signal of the controller; A translucent member disposed between the light emitting device and the liquid crystal display to transmit the light of the light emitting device to the liquid crystal display, and having a light transmissive member having a light transmittance toward the center from a portion corresponding to the light emitting device; And a holder member supporting the liquid crystal display and the translucent member and having a light transmission path for transmitting the light from the light emitting element to all parts of the liquid crystal display. The method of claim 1, The translucent member is a display device for a microwave oven, characterized in that the thickness is reduced toward the center from the portion corresponding to the light emitting element. The method of claim 2, The light transmission path formed in the holder member is formed to be inclined toward the side where the liquid crystal display is located gradually toward the center side of the liquid crystal display in the same way as the shape of the translucent member.