TWI397052B - Display method for liquid crystal display - Google Patents

Description

LCD TV display method

The present invention relates to a display method, and more particularly to a display method of a liquid crystal television.

In recent years, with the increasing maturity of optoelectronic technology and semiconductor manufacturing technology, flat display devices have flourished. Among them, based on its low voltage operation, no radiation scattering, light weight and small size, LCD TVs have gradually replaced traditional cathode ray tube TVs and become the mainstream of TV products in recent years.

When a conventional LCD TV does not receive an RF-free signal or a peripheral audio-visual device has no signal input, it will display a snow-like screen or a blue screen to let the user know that there is no signal status. At this time, the backlight provided by the backlight module of the LCD TV still maintains the original brightness and consumes electric energy, thereby causing unnecessary energy waste. In addition, when the signal input by the peripheral audio-visual device is fixed, for example, when the user presses the pause button, the backlight provided by the backlight module also maintains the original brightness and wastes energy. With the gradual rise of environmental awareness and the increasing demand for energy-saving products, some traditional LCD TVs will directly turn off the backlight module and LCD panel of the LCD TV to save energy when the signal input or input signal is fixed for a period of time. . However, this method will make it impossible for the user to understand that the LCD TV is turned off because no signal input or input signal is fixed, which causes inconvenience to the user when using the LCD TV.

The invention provides a display method of a liquid crystal television, which can achieve energy saving effect without reducing the convenience of use of the liquid crystal television.

A display method of a liquid crystal television of the present invention includes the following steps. First, a backlight module of the LCD TV is turned on to provide a backlight having a first brightness, and a liquid crystal panel of the liquid crystal television is turned on to continuously display an input signal provided by a signal source. Then, when the input signal provided by the signal source remains unchanged or the signal source stops providing the input signal for more than a predetermined period, the brightness of the backlight provided by the backlight module is reduced by the first brightness, and is continuously turned on. LCD panel. Then, when the input signal provided by the signal source starts to change again or the signal source resumes providing the input signal, the brightness of the backlight provided by the backlight module is restored to the first brightness.

In an embodiment of the display method of the liquid crystal television of the present invention, the step of reducing the brightness of the backlight includes gradually reducing the brightness of the backlight.

In an embodiment of the display method of the liquid crystal television of the present invention, the step of reducing the brightness of the backlight includes turning off the backlight module.

In an embodiment of the display method of the liquid crystal television of the present invention, the step of reducing the brightness of the backlight includes reducing the magnitude of the driving current of the backlight module.

In an embodiment of the display method of the liquid crystal television of the present invention, the display method further comprises setting a preset period by a user.

Based on the above, the display method of the liquid crystal television of the present invention can achieve the purpose of energy saving by reducing the brightness of the backlight, and allows the user to understand the current state of use by the continuously open liquid crystal panel to increase the convenience of the use of the LCD TV. .

The above described features and advantages of the present invention will be more apparent from the following description.

1 is a flow chart showing a display method of a liquid crystal television according to an embodiment of the present invention. The display method of this embodiment is applicable to a liquid crystal television. The LCD TV includes a liquid crystal panel and a backlight module. The LCD panel is used to display the input signal provided by the signal source, such as a DVD player, a cable/wireless TV signal source, a computer or other signal source. The backlight module is used to provide a backlight required for the liquid crystal panel. The backlight module uses, for example, a cold cathode fluorescent lamp, a light emitting diode, or other light emitting elements.

Referring to FIG. 1, the backlight module of the LCD TV is first turned on to provide a backlight having a first brightness, and the liquid crystal panel of the liquid crystal television is turned on to continuously display the input signal provided by the signal source, as shown in step S10. Specifically, the first brightness of the backlight provided by the backlight module in step S10 is based on the principle that the liquid crystal television can be normally displayed. Generally, the first brightness referred to herein allows the user to adjust to his or her preference.

Then, in step S20, when the input signal provided by the signal source remains unchanged for more than a predetermined period, or when the signal source stops providing the input signal for more than the preset period, the backlight provided by the backlight module is provided. The brightness of the source begins to decrease from the first brightness and continues to open the liquid crystal panel. For example, after the LCD TV is turned on, the status of the input signal provided by the signal source is continuously detected. When the input signal provided by the signal source remains unchanged (for example, the user presses the pause button of the DVD player) and remains unchanged for more than the preset period, the brightness of the backlight is lowered from the first brightness. Alternatively, when the signal source no longer provides an input signal (for example, the television signal is disconnected or the program is played), and the time when the signal is not input exceeds the preset period, the brightness of the backlight is also lowered from the first brightness. The brightness of the backlight may be gradually reduced or directly decreased to a preset brightness. Finally, you can choose to completely turn off the backlight or maintain the brightness of the backlight at a lower level than the first brightness, while continuously turning on the LCD panel, so that the user can clearly see that the LCD TV is in an abnormal display state.

In addition, the aforementioned preset period may be set by the manufacturer of the LCD TV before leaving the factory, but may also be opened to the user to set according to the requirements. In addition, the method of reducing the brightness of the backlight is, for example, reducing the magnitude of the driving current of the backlight module.

Then, in step S30, when the input signal provided by the signal source starts to change again (for example, the user presses the play button of the DVD player), or when the signal source resumes providing the input signal (for example, TV signal recovery), The brightness of the backlight provided by the backlight module is restored to the first brightness. That is, the LCD TV is restored to the normal display state.

In summary, in the display method of the liquid crystal television of the present invention, when the liquid crystal television is in an abnormal display state in which the signal is fixed or the signal is fixed, the brightness of the backlight provided by the backlight module is lowered, but the liquid crystal panel is Keep on. Therefore, it is possible to save energy by reducing the brightness of the backlight, and the user can understand the current state of use by the liquid crystal panel that is continuously turned on, thereby increasing the convenience of use while saving energy.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

S10~S30‧‧‧Steps

1 is a flow chart showing a display method of a liquid crystal television according to an embodiment of the present invention.

S10~S30. . . step

Claims (5)

A display method for a liquid crystal television includes: turning on a backlight module of the liquid crystal television to provide a backlight having a first brightness, and turning on a liquid crystal panel of the liquid crystal television to continuously display an input signal provided by a signal source When the input signal provided by the signal source remains unchanged, the LCD panel continues to display the same input signal time or the signal source stops providing the input signal, so that the LCD panel does not display the input signal for more than a predetermined period of time. The brightness of the backlight provided by the backlight module is lowered by the first brightness, and the liquid crystal panel is continuously turned on; and when the input signal provided by the signal source starts to change again or the signal source restarts to provide an input signal The brightness of the backlight provided by the backlight module is restored to the first brightness. The display method of the liquid crystal television of claim 1, wherein the step of reducing the brightness of the backlight comprises gradually reducing the brightness of the backlight. The display method of the liquid crystal television of claim 1, wherein the step of reducing the brightness of the backlight comprises turning off the backlight module. The display method of the liquid crystal television according to claim 1, wherein the step of reducing the brightness of the backlight comprises reducing a magnitude of a driving current of the backlight module. The display method of the liquid crystal television according to claim 1, further comprising setting the preset period by a user.