A remote control white backlight liquid crystal display control circuit
A liquid crystal display and control circuit technology, applied to instruments, static indicators, etc., can solve problems such as the inability to effectively start the white LED backlight of the remote control, and achieve the effects of uniform brightness without change, stable light display, and reduced power consumption
Active Publication Date: 2019-02-01
QINGDAO HAIER TECH
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Problems solved by technology
[0006] In order to solve the technical problem in the prior art that the white LED backlight of the remote control cannot be effectively activated when the power supply voltage is low, the present invention provides a liquid crystal display control circuit for the remote control
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[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.
[0039] figure 1 It is the structural diagram of the white backlight liquid crystal display control circuit of the remote controller in the embodiment; figure 1 , The...
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The invention discloses a remote controller white backlight LCD control circuit which comprises a power supply, a main control circuit, a boost circuit, an on-off control circuit, and a white light emitting diode LED. The positive voltage input end of the main control circuit is connected to the positive electrode of the power supply, and the negative voltage input end is connected to the negative electrode of the power supply. Both the boost circuit and the on-off control circuit are connected to the power supply. The first output end of the main control circuit is connected to the input end of the boost circuit, and the second output end of the main control circuit is connected to the input end of the on-off control circuit. The output end of the boost circuit is connected to the positive electrode of the white light emitting diode LED. The output end of the on-off control circuit is connected to the negative electrode of the white light emitting diode LED. According to the white backlight LCD control circuit applied to a remote controller, a white light backlight light source with a high driving voltage can work with low power supply voltage, with the consumption of power supply power, the light display is stable, the brightness is uniform and has no change, the power consumption can be reduced, and the service life of the power supply can be prolonged to the maximum.
Description
technical field [0001] The invention relates to a remote controller circuit, in particular to a remote controller white backlight liquid crystal display control circuit. Background technique [0002] Household electrical appliances (such as washing machines, water heaters, air conditioners, televisions, etc.) that are widely used in life are generally equipped with remote controls. At present, the backlight of the remote control LCD screen mostly uses ordinary colored LEDs, such as orange LEDs, green LEDs, etc. The control circuit is composed of basic resistors and triodes. on the LCD screen. [0003] The prior art has the following disadvantages: [0004] 1. The brightness of the backlight of the LCD screen will continue to dim as the power supply of the remote control is exhausted. [0005] 2. Usually the remote controller is powered by two No. 7 alkaline power supplies. The power supply voltage of the two new power supplies is slightly higher than 3.0V. As the power su...
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IPC IPC(8): G09G3/34
CPCG09G3/3406
Inventor 董金运吴恩豪
Owner QINGDAO HAIER TECH