阅读说明：本技术 洗衣机及其显示屏的显示控制方法 (Washing machine and display control method of display screen of washing machine ) 是由 崔旭利 范芷若 祝晨 于 2018-09-10 设计创作，主要内容包括：一种洗衣机显示屏的显示控制方法,所述显示屏包含背光源,控制装置控制背光源的闪现频率,在脱水过程中,通过控制装置控制供给背光源的闪现频率,使之配合箱体的振动频率,只在箱体振动到达的同一位置附近闪现,在其他位置关闭。一种洗衣机,包含显示屏以及控制装置,所述控制装置根据以上方法控制显示屏的显示。显示屏的每次显示都在箱体振动同一位置,从而使人眼观察到的显示内容不会因为发生重叠而模糊。(A display control method of a display screen of a washing machine is characterized in that the display screen comprises a backlight source, a control device controls the flash frequency of the backlight source, and in the dehydration process, the flash frequency supplied to the backlight source is controlled by the control device to be matched with the vibration frequency of a box body, so that the flash frequency can be flashed near the same position where the box body reaches by vibration and can be closed at other positions. A washing machine comprises a display screen and a control device, wherein the control device controls the display of the display screen according to the method. Each time the display screen is displayed, the box body vibrates at the same position, so that the display content observed by human eyes cannot be blurred due to overlapping.)

1. A display control method of a washing machine display screen is characterized in that the display screen is arranged on a box body and comprises a backlight source, and a control device controls the flash frequency of the backlight source, and is characterized in that: during the dehydration, the control device controls the flash frequency of the backlight source to match the vibration frequency of the box body, so that the flash light flashes near the same position where the box body vibrates and is closed at other positions.

2. The control method according to claim 1, characterized in that: during the dehydration, the control means sets the flash frequency supplied to the backlight to be close to or equal to one or two times the vibration frequency of the cabinet.

3. The control method according to claim 1, characterized in that: the control means sets the flicker frequency supplied to the backlight to one or two times the vibration frequency of the cabinet when the rotation speed of the drum reaches or exceeds a predetermined rotation speed during the dehydration.

4. A control method according to claim 3, characterized in that: whether the drum rotation speed reaches or exceeds a predetermined rotation speed is determined by detecting the current of the motor.

5. A control method according to claim 3, characterized in that: whether the drum rotation speed reaches or exceeds a predetermined rotation speed is determined by a detection value of a sensor mounted on the washing machine.

6. The control method according to claim 1, characterized in that: the vibration frequency of the box body is the vibration frequency of the box body at the highest dehydration rotating speed.

7. The control method according to claim 1, characterized in that: in the dehydration process, the vibration frequency of the box body is determined in real time, and the control device sets the flash frequency provided for the backlight source as the vibration frequency of the box body measured in real time.

8. The control method according to claim 1, characterized in that: in the dehydration process, the vibration frequency of the box body is determined in real time, the time when the vibration amplitude is close to the balance position is determined, the control device sets the flash frequency provided for the backlight source to be twice of the vibration frequency of the box body, and the flash is performed at the time when the vibration amplitude is close to the balance position.

9. The control method according to claim 1, characterized in that: the control device sets a flicker frequency provided to the backlight source to be twice as high as a vibration frequency of the cabinet and flicks at a time when the vibration amplitude approaches the equilibrium position.

10. The control method according to claim 9, characterized in that: when the drum reaches or exceeds a predetermined rotation speed, if the vibration frequency of the cabinet is less than a preset threshold value, a time when the vibration amplitude approaches the equilibrium position is determined, and the control means sets the flash frequency supplied to the backlight source to be twice the vibration frequency of the cabinet and flashes at the time when the vibration amplitude approaches the equilibrium position.

11. A washing machine comprises a display screen and a control device, and is characterized in that: the control device controls display of a display screen according to the control method according to any one of claims 1 to 10.

[ technical field ] A method for producing a semiconductor device

The invention relates to control of a backlight source of a washing machine display screen.

[ background of the invention ]

The display screen of the washing machine basically adopts the LED or LCD display technology. The display technologies such as LED and LCD control the backlight source to ensure stable and brightness-adjustable screen display with a certain refresh frequency. For example, the LEDs are turned on and off rapidly according to a certain frequency, and the pulse frequency is generally above 100Hz, so that human eyes can see the content without flickering.

When the washing machine dehydrates water at a high speed, the display content on the display screen on the box body vibrates left and right around a static position (balance position) along with the vibration of the box body. When the vibration amplitude is relatively large and the frequency is relatively high, due to the persistence of vision effect of human eyes, the display content viewed by people can be overlapped by a plurality of images, that is, the images become blurred and difficult to recognize, as shown in fig. 1.

[ summary of the invention ]

It is an object of the invention to improve the display of a display screen in a vibrating state.

The invention provides a display control method of a display screen of a washing machine, wherein the display screen comprises a backlight source, a control device controls the flash frequency of the backlight source, and in the dehydration process, the flash frequency supplied to the backlight source is controlled by the control device to be matched with the vibration frequency of a box body, so that the flash frequency can flash only at the same position where the box body reaches in a vibration mode and can be closed at other positions. Wherein the flashing of the backlight occurs in accordance with a pulse signal controlled by the control means.

In some embodiments, the control device sets the flash frequency provided to the backlight to be close to or equal to one or two times the vibration frequency of the cabinet during the dehydration process.

Preferably, the control means sets the flicker frequency supplied to the backlight to one or two times the vibration frequency of the cabinet when the rotation speed of the drum reaches or exceeds a predetermined rotation speed during the dehydration.

Preferably, it is determined whether the drum rotation speed reaches or exceeds a predetermined rotation speed by detecting a current of the motor.

Preferably, it is determined whether the drum rotation speed reaches or exceeds a predetermined rotation speed through a detection value of a sensor mounted on the washing machine. Wherein the sensor can be an acceleration sensor, a displacement sensor, a Hall sensor, a 3D sensor and the like.

Preferably, the vibration frequency of the box body is the vibration frequency of the box body at the highest dehydration rotating speed. It is also feasible to set the flicker frequency of the backlight to be close to or equal to one or two times the vibration frequency of the cabinet at the highest dehydration rotation speed even at a lower rotation speed. When the rotation speed is low, the phenomenon that the displayed content is overlapped and blurred is not easy to occur. Fixedly setting the flicker frequency of the backlight to be close to or equal to one or two times the vibration frequency of the cabinet at the highest dehydration rotation speed can simplify the control circuit and the program.

Preferably, during the dehydration process, the vibration frequency of the cabinet is determined in real time, and the control means sets the flash frequency supplied to the backlight to the vibration frequency of the cabinet measured in real time.

In the dehydration process, the vibration frequency of the box body is determined in real time, the time when the vibration amplitude is close to the balance position is determined, the control device sets the flash frequency provided for the backlight source to be twice of the vibration frequency of the box body, and the flash is performed at the time when the vibration amplitude is close to the balance position.

The control device sets a flicker frequency provided to the backlight source to be twice as high as a vibration frequency of the cabinet and flicks at a time when the vibration amplitude approaches the equilibrium position.

If the vibration frequency of the cabinet is small, for example, lower than 20hz, setting the flicker frequency of the backlight to this frequency tends to cause a visual effect of flickering of the display content. And if the flicker frequency of the backlight is increased to two times, the observed effect of flicker can be obviously relieved. Then, when the drum reaches or exceeds a predetermined rotation speed, if the vibration frequency of the cabinet is less than a preset threshold value, a time when the vibration amplitude approaches the equilibrium position is determined, and the control means sets the flicker frequency supplied to the backlight source to twice the vibration frequency of the cabinet and flashes at the time when the vibration amplitude approaches the equilibrium position.

The invention also provides a washing machine, which comprises a display screen and a control device, wherein the control device controls the display of the display screen according to the method.

When the flash frequency of the backlight source is close to or equal to the vibration frequency of the box body, no matter the flash (maximum value, balance position, minimum value or other positions) is at any position of the vibration, the backlight source is started to enable the display screen to display at the same position or nearby where the display screen reaches along with the vibration of the washing machine box body at each moment, and therefore the display content observed by human eyes cannot be blurred due to overlapping.

When the flash frequency of the backlight is close to or equal to twice the vibration frequency of the cabinet, the backlight is turned on at the same frequency as the frequency at which the cabinet vibrates to the equilibrium position. Therefore, the opening time of the backlight source is controlled to be coincident with the time when the box body reaches the equilibrium position, each time of display of the display screen can be at the same position of vibration of the box body, and therefore display contents observed by human eyes cannot be blurred due to overlapping.

The invention will be further described with reference to the accompanying drawings.

[ description of the drawings ]

FIG. 1 is a human eye observation effect of a display screen showing ghost images generated by vibration of a box body;

FIG. 2 is a diagram illustrating the connection relationship between the relevant components of the washing machine;

FIG. 3 is a diagram illustrating the relationship between the backlight lighting frequency and time and the vibration of the cabinet according to the first embodiment;

fig. 4 is a diagram showing the correspondence between the backlight lighting frequency and time and the cabinet vibration in the second embodiment.

[ detailed description ] embodiments

As shown in fig. 2, the washing machine 1 includes a cabinet 2, a display 3 on the cabinet, a drum 5 rotatably driven by a motor 4, a sensor 6 mounted in the cabinet, and a control device 7. Wherein the display screen 3 comprises a backlight 8 arranged behind it and providing illumination thereto. The backlight 9 is turned on or off according to a pulse signal controlled by the control device 7.

In order to eliminate the blurring caused by the persistence of vision, the control device 7 can control the flash frequency supplied to the backlight 8 so that the flash frequency is turned on only at the same position where the cabinet vibrates and turned off at other positions in accordance with the vibration frequency of the cabinet 2.

As shown in fig. 3, when the flicker frequency supplied to the backlight 8 coincides with the vibration frequency of the cabinet 2, each of the flicker times appears in the vicinity of the same position where the cabinet 2 vibrates, regardless of the position where the backlight 8 is vibrated, and thus it is possible to ensure that the display contents are not blurred. In the figure, a sine wave 11 is a vibration displacement wave of the cabinet 2, and a thick short line 12 indicates a period of time during which the backlight 8 flashes.

However, when the vibration frequency of the cabinet 2 is low, for example, 20Hz, the appearance of flickering of the display content is easily caused. At this time, if the flicker frequency supplied to the backlight 8 is increased to 2 times of the vibration frequency of the cabinet to about 40Hz, the appearance of display flicker can be greatly reduced.

Thus, a threshold value, for example 20Hz, may be preset. If the frequency of the vibrations of the cabinet 2 is less than a preset threshold, the control device 7 increases the flash frequency supplied to the backlight 8. As shown in fig. 4, it can be found that only at the equilibrium position where the casing 2 is vibrated, the time interval for the casing to vibrate to the same position is equal and 2 times the vibration frequency. The flash frequency supplied to the backlight 8 can then be increased to twice the frequency of the box vibration while the flash 8 is occurring at a time when the vibration amplitude is close to the equilibrium position. At this time, the appearance of the flicker of the display content is improved. In fig. 4, a sine wave 13 is a vibration displacement wave of the cabinet 2, and a thick short line 14 indicates a period during which the backlight 8 flashes.

In general, when the dewatering rotation speed of the drum exceeds a certain value, for example, 1000 rpm, the blurring of the display is relatively easily generated, and the vibration frequency of the casing 2 is usually 20 ± 3.3 Hz. Therefore, the frequency of the backlight 8 may be set in accordance with the vibration frequency of the cabinet 2 only when the spin-drying rotation speed of the drum 5 exceeds a predetermined rotation speed, for example, 1000 revolutions, and the power supply pulse may be controlled at the normal frequency of the flash before the rotation speed of the drum 5 reaches the predetermined rotation speed. Also, the flicker frequency of the backlight 8 may be set to a certain preset value, for example, 20Hz, based on empirical values without detecting the real-time vibration frequency of the cabinet. In other alternative embodiments, it is also possible to set the flash frequency to this preset value throughout the dewatering process.

Wherein it is possible to determine whether the drum rotation speed reaches or exceeds the predetermined rotation speed by detecting the current of the motor or by the detection value of the sensor 6 mounted on the washing machine.

For better results, the vibration frequency of the tank 2 can be determined in real time during the dehydration, and the control device 7 sets the flash frequency supplied to the backlight 8 to the vibration frequency of the tank 2 measured in real time.

It is also possible that the vibration frequency of the cabinet 2 is determined in real time only when the rotation speed of the drum during the dehydration reaches or exceeds a predetermined rotation speed, and the control device 7 sets the flash frequency supplied to the backlight 8 to the vibration frequency of the cabinet 2 measured in real time.

In addition, during the dehydration, it is also determined whether the drum rotation speed reaches or exceeds a predetermined rotation speed through the detection value of the sensor 6. When the rotational speed of the drum reaches or exceeds a predetermined rotational speed, the vibration frequency of the cabinet 2 is determined, and if the vibration frequency of the cabinet 2 is less than a preset threshold value, for example, 20Hz, the time when the vibration amplitude approaches the equilibrium position is determined, and the control device 7 sets the flash frequency supplied to the backlight 8 to twice the measured vibration frequency of the cabinet 2 according to the above information and flashes at the time when the vibration amplitude approaches the equilibrium position. The above information can be detected in real time under the control of the control device 7, and corresponding adjustment can be performed in real time.

The various embodiments described above and shown in the drawings are illustrative of the invention and are not exhaustive of the invention. Any modification of the present invention by a person of ordinary skill in the related art within the scope of the basic technical idea of the present invention is within the scope of the present invention.