Abstract

The present invention relates to the technical field of refrigeration. A refrigerant shunt and refrigeration equipment. One end (11) of the shunt (10) is open, while a port of another end (12) has a plurality of first divided-flow holes (13); second divided-flow holes (15) are provided on a wall (14) of the shunt (10). Such structure may increase the number of divided-flow holes provided on the shunt, achieving more systematic flow paths for the divided flow of a refrigerant.

IPC Classes  ?

• F25B 41/00 - Fluid-circulation arrangements
• F28F 9/02 - Header boxesEnd plates

Abstract

Provided are an active control method and device for an inverter air conditioner. The control method comprises: starting an inverter compressor, and operate the inverter compressor for a first length of time at a first frequency; detecting the temperature of an intelligent power module IPM; detecting the temperature of an outdoor coil when the temperature of the intelligent power module IPM does not exceed a threshold; deciding whether to adjust the first frequency according to a temperature range to which the temperature of the outdoor coil belongs. If the temperature of the outdoor coil is relatively low, the first frequency is increased to improve the cooling capacity of the inverter air conditioner, and the temperature of the outdoor coil is further corrected; and if the temperature of the outdoor coil is relatively high, there is no need to adjust the first frequency, and an exhaust pressure is detected. The control method achieves active control on an inverter air conditioner, so as to achieve the purpose of maintaining the cooling capacity of the inverter air conditioner in a high-temperature environment.

IPC Classes  ?

• F25B 49/02 - Arrangement or mounting of control or safety devices for compression type machines, plants or systems

Abstract

A four-way valve (2) for a multi-split air conditioner and a multi-split air conditioner. The four-way valve (2) comprises a main valve body (21), a valve chamber (22) being provided in the main valve body (21), compressor exhaust valve ports (23), a condenser valve port (24), an evaporator valve port (25), and compressor gas return valve ports (26) communicated with the valve chamber (22) being provided on the main valve body (21), the compressor exhaust valve ports (23) and the compressor gas return valve ports (26) being multiple in number, the plurality of compressor exhaust valve ports (23) being used for connecting to exhaust conduits of a plurality of compressors (1) in a one-to-one correspondence, the condenser valve port (24) being used for connecting to an external conduit of a condenser (3), the evaporator valve port (25) being used for connecting to external conduits of a plurality of evaporators (5), and the plurality of compressor gas return valve ports (26) being used for connecting to gas return conduits of the plurality of compressors (1) in a one-to-one correspondence. The four-way valve (2) is used for realizing the changeover circulation of refrigerant in an air conditioner, reducing costs and simplifying connection structures.

IPC Classes  ?

• F25B 41/04 - Disposition of valves
• F25B 5/02 - Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
• F24F 1/00 - Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station

Abstract

Disclosed is a mounting system of an air-conditioner indoor unit, the system comprising: a wall hanging plate (101) for connecting to a wall surface, and a positioning plate (102) capable of being positioned at a set position of the wall hanging plate (101). The positioning plate (102) comprises an identifying part (103), which identifying part (103) is parallel to the wall hanging plate (101) in a state where the positioning plate (102) and the wall hanging plate (101) are relatively positioned, and a set distance is formed between the identifying part and the wall hanging plate (101) so as to mark the position of a wall penetrating hole. Further disclosed is an air-conditioner using the mounting system of an indoor unit.

IPC Classes  ?

• F24F 13/32 - Supports for air-conditioning, air-humidification or ventilation units

Abstract

A water fullness alarm device for a dehumidifier, for use in improving the reliability and stability of system response. The device comprises an alarm switch (1). The alarm switch (1) comprises a switch button (2) covered with an elastic member (3). One end of the elastic member (3) is fixed, and the other end is free. The device further comprises a rotatable bracket (4). A first end of the bracket (4) is connected with a float (5), and a second end of the bracket (4) is propped against the elastic member (3). When the float (5) floats upward, the end of the bracket (4) propped against the elastic member (3) can swing around the rotating axis of the bracket (4) and drives the elastic member (3) to trigger the switch button (2).

IPC Classes  ?

• H01H 35/18 - Switches operated by change of liquid level or of liquid density, e.g. float switch
• F24F 3/14 - Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatmentApparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidificationAir-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatmentApparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by dehumidification

Abstract

An air conditioner indoor unit, comprising a shell, the shell being provided with an indoor air inlet (1), an outdoor air inlet (2), and an air outlet (3), a double side air inlet centrifugal fan (4) being arranged inside the shell, the centrifugal fan comprising a first air inlet side (41), a second air inlet side (42), and an air outlet side, the first air inlet side (41) being arranged opposite the indoor air inlet (1), the second air inlet side (42) being arranged opposite the outdoor air inlet (2), the air outlet side being arranged opposite the air outlet (3), and a heat exchanger (5) being arranged between the first air inlet side (41) and the indoor air inlet (1).

IPC Classes  ?

• F24F 1/00 - Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station

Abstract

A method for detecting cooling medium leakage, and an air conditioner. The method comprises: when a continuous operating duration of a compressor of an air conditioner reaches a first preset duration, acquiring an indoor environment temperature and an indoor heat exchanger temperature of the air conditioner; and determining whether leakage occurs to a cooling medium of the air conditioner according to the environment temperature and the indoor heat exchanger temperature. The method is used in the field of air conditioner control without needing to provide a dedicated temperature sensor, and can realize the detection of cooling medium leakage while not increasing complete machine cost, thereby facilitating the promotion and application of an air conditioner.

IPC Classes  ?

• G01M 3/00 - Investigating fluid tightness of structures
• F24F 11/02 - Arrangement or mounting of control or safety devices

Abstract

A method for detecting cooling medium leakage and an air conditioner. The method comprises: when a continuous operating duration of a compressor of an air conditioner reaches a first preset duration, acquiring an indoor environment temperature and an outflow temperature of an indoor air outlet of the air conditioner; and determining whether leakage occurs to a cooling medium of the air conditioner according to the environment temperature and the outflow temperature. The detection method can realize the detection of cooling medium leakage while not increasing complete machine cost, thereby facilitating the promotion and application of an air conditioner.

IPC Classes  ?

• F24F 11/02 - Arrangement or mounting of control or safety devices
• F25B 49/02 - Arrangement or mounting of control or safety devices for compression type machines, plants or systems

Abstract

An air conditioner circulating system and an air conditioner. The air conditioner circulating system comprises a compressor (1), a condenser (2), a throttling device (3), a gas-liquid separator, and an evaporator (4). The condenser (2) has one end communicated with the compressor (1) and the other end is communicated with one end of the throttling device (3) through a first pipeline (5). The other end of the throttling device (3) is communicated with one end of the evaporator (4), and the other end of the evaporator (4) is communicated with the inlet of the gas-liquid separator through a second pipeline (6). The outlet of gas-liquid separator is communicated with the compressor (1). The cooling medium in the first pipeline (5) can exchange heat with the medium in the second pipeline (6) through the tube wall of the first pipeline (5) and/or the second pipeline (6). The air conditioner circulating system provided is applied to the air conditioner.

IPC Classes  ?

• F25B 41/00 - Fluid-circulation arrangements

Abstract

Disclosed are a power factor control method and apparatus. The method includes: acquiring an input voltage value; calculating a duty cycle of turn-on time of a chopper tube to a carrier period according to the input voltage value and a pre-set output voltage target value; and controlling the turn-on time or turn-off time of the chopper tube (708), or the carrier period according to the duty cycle, wherein the turn-off time of the chopper tube is not less than a first pre-set time, the turn-on time of the chopper tube is not less than a third pre-set time, the first pre-set time plus the third pre-set time is less than a second pre-set time, and the second pre-set time is a rated period of the chopper tube. The method and apparatus can improve electromagnetic compatibility of a power electronic apparatus, and reduces loss of a power switch tube.

IPC Classes  ?

• H02M 1/42 - Circuits or arrangements for compensating for or adjusting power factor in converters or inverters

Abstract

A variable-load, variable-frequency control method and a controller. The method is applicable in a variable-frequency air conditioner controller. The controller comprises a master control unit (MCU) (3), a direct current bus circuit, and a three-phase inverter circuit (2) connected thereto. The three-phase inverter circuit (2) drives a compressor into work. The MCU (3) generates a PWM wave to drive the three-phase inverter circuit (2) into work. The method comprises: a compressor phase current is detected; when the compressor is operating, a compressor rotor speed is calculated by the MCU (3) on the basis of the compressor phase current, and a carrier frequency of the PWM wave is set on the basis of the compressor rotor speed, where a lower PWM wave carrier frequency is set when the compressor rotor speed is low, and a higher PWM wave carrier frequency is set when the compressor rotor speed is high. The present invention implements dynamic adjustments of PWM wave carrier frequencies during operation, thus implementing optimal carrier control adapted to the driving frequency of the compressor.

IPC Classes  ?

• F24F 11/00 - Control or safety arrangements
• H02P 27/08 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters with pulse width modulation

Abstract

A single-phase variable-frequency air conditioner control method, which employs an FOC magnetic field-oriented vector control algorithm to serve as a three-phase inverter drive algorithm. The method comprises: acquiring a target compressor rotational speed and detecting a voltage value of a single-phase alternating current; extracting an alternating current voltage phase on the basis of the voltage value of the alternating current; determining a q-shaft current target value on the basis of the alternating current voltage phase and of the target compressor rotational speed, and participating in an FOC magnetic field-oriented vector control algorithm, where the determined q-shaft current target value is associated with the single-phase alternating current to adjust the output power of a compressor driver, thus allowing the output power to change in a same phase with the voltage of the single-phase alternating current. Also disclosed is a single-phase variable-frequency air conditioner controller. The single-phase variable-frequency air conditioner controller allows costs of a variable-frequency air conditioner to be reduced and circuit power factor to be increased.

IPC Classes  ?

• H02P 21/08 - Indirect field-oriented controlRotor flux feed-forward control
• F24F 11/00 - Control or safety arrangements

Abstract

The present invention relates to the field of variable-frequency air conditioners and specifically relates to an alternating-alternating variable-frequency air conditioner control method and a controller. The method comprises: acquiring a target compressor rotational speed and detecting a three-phase voltage value of a three-phase alternating current; extracting a phase and phase sequence of the three-phase voltage on the basis of the three-phase voltage value; determining a q-shaft current target value on the basis of the phase and phase sequence of the three-phase voltage and of the target compressor rotational speed, and participating in an FOC magnetic field-oriented vector control algorithm, where the determined q-shaft current target value is associated with a three-phase power source to adjust the output power of a compressor driver, thus allowing the output power to change in a same phase with the three-phase alternating current voltage. The present invention allows significantly reduced capacity of a storage capacitor while increasing power factor and obviates an active PFC circuit, thus increasing the conversion efficiency of the controller.

IPC Classes  ?

• H02P 21/00 - Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation

Abstract

A variable-frequency air conditioner control method, applicable in a variable-frequency air conditioner controller, comprising: performing a compensation control on a q-shaft current in a compressor, where the compensation method is such that: updating a q-shaft current command value on the basis of a main circuit bus voltage, Vp, and participating in a conventional FOC vector algorithm, increasing the q-shaft current command value when Vp rises, and decreasing the q-shaft current command value when Vp drops.

IPC Classes  ?

• F24F 11/02 - Arrangement or mounting of control or safety devices

Abstract

An air sweeping device for an air conditioner, comprising a rotating shaft (1) and a plurality of air sweeping blades (2). The rotating shaft (1) is arranged at the air outlet (31) of the air conditioner, and is rotatably connected with the machine shell (3) of the air conditioner. The plurality of air sweeping blades (2) are fixed side by side on the rotating shaft (1) in the axial direction of the rotating shaft (1), and obliquely arranged in the same direction relative to the rotating shaft (1). When the airflow is supplied to the air sweeping blades (2), the air sweeping blades (2) and the rotating shaft (1) can be pushed by the airflow to rotate around the axis of the rotating shaft (1).

IPC Classes  ?

• F24F 13/10 - Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers

Abstract

Disclosed is a capillary tube throttling device, comprising a filter (301), a capillary tube (302), and a collection tube (303). The capillary tube (302) brings the filter (301) and the collection tube (303) into communication. At least two capillary tubes (302) are not equal in length. A refrigerating apparatus comprises the capillary tube throttling device. The capillary tube throttling device and the refrigerating apparatus can be used on electrical devices having higher requirements of user comfort and the reliability of the whole machine.

IPC Classes  ?

• F25B 41/06 - Flow restrictors, e.g. capillary tubes; Disposition thereof

Abstract

A heat exchange fin of a heat exchanger comprises a base plate (1). The surface of the base plate (1) is wave-shaped. Several through holes (11) matched to the cooling medium pipeline are arranged on the base plate (1). Several louver structures (12) are arranged around the through holes (11) on the base plate (1). By arranging the louver structures (12) on the wave-shaped base plate (1), air can flow toward another side of the base plate (1) by the interspaces between the adjacent louvers (121, 122, 123) of the louver structures (12) when the air flows through the valley of the base plate (1), which prevents an air current vortex from forming. In addition, the air current flow is under conditions of turbulent flow for the change of air flow direction, which benefits heat transfer between the cooling medium pipeline and the air current and improves the heat exchange efficiency of the heat exchanger.

IPC Classes  ?

• F28F 1/32 - Tubular elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
• F28D 1/04 - Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with the heat-exchange conduits immersed in the body of fluid with tubular conduits

Abstract

Disclosed is an air channel design method for a refrigerator with a centrifugal fan. The method comprises the steps of: firstly, determining a theoretical air distribution ratio according to a volume and temperature of each chamber of the refrigerator; then, analyzing and calculating to obtain key technical parameters as boundary conditions for air channel flow field analysis according to a rotation speed of the centrifugal fan and "centrifugal fan velocity triangle" determined by an impeller outlet angle; and finally, calculating and correcting the obtained air channel structure by using a simulation software. The air channel designed according to the design method can not only reasonably distribute the air volume to each chamber of the refrigerator, but also enable the simulated value of the air channel design to approach the theoretical value to the greatest extent.

IPC Classes  ?

• F25D 17/06 - Arrangements for circulating cooling fluidsArrangements for circulating gas, e.g. air, within refrigerated spaces for circulating gas, e.g. by natural convection by forced circulation
• F04D 29/28 - Rotors specially adapted for elastic fluids for centrifugal or helico-centrifugal pumps

Abstract

An air conditioner and a control method therefor. The air conditioner comprises an air conditioner body (1), a control device (2) and a data acquisition device (21) which is arranged at the exterior of the air conditioner body (1). The data acquisition device (21) comprises a temperature sensor and a humidity sensor, wherein the signal output ends of the temperature sensor and the humidity sensor are connected to the input end of the control device (2). When the air conditioner operates, the control device (2) judges temperature and humidity data acquired respectively by the external temperature sensor and humidity sensor through user-defined conditions to determine the environmental state of air, and feeds back the data to the air conditioner body (1); and the air conditioner body (1) determines the operational state according to the feedback data.

IPC Classes  ?

• F24F 11/02 - Arrangement or mounting of control or safety devices

Abstract

Disclosed is an outdoor unit of an air conditioner, the unit comprising a main outdoor unit body (1), wherein a fan (2) and a condenser (3) are arranged in the main outdoor unit body (1); the condenser (3) is arranged at the rear side of the fan (2); an air flow cavity (5) is formed between the condenser (3) and the fan (2); an air passage pipe (4) with a hollow cavity (41) is further arranged in the main outdoor unit body (1); an air outlet (411) of the hollow cavity (41) is in communication with the air flow cavity (5); an air inlet (412) of the hollow cavity (41) is in communication with the outside of the air flow cavity (5); and an electric control device (6) of the outdoor unit of the air conditioner is mounted inside the hollow cavity (41) of the air passage pipe (4).

IPC Classes  ?

• F24F 1/24 - Cooling of electric components

Abstract

A zero-crossing signal detection circuit relates to the field of air conditioner detection devices, and comprises a zero-crossing signal detection circuit (1), a signal conversion circuit (2), and a single-chip machine (3) that are sequentially connected. The zero-crossing signal detection circuit (1) is further connected to a power frequency alternating current. The zero-crossing signal detection circuit (1) comprises a resistance-capacitance buck circuit (11) and a half-wave rectifying circuit (12). The signal conversion circuit (2) comprises a triode amplifier output circuit (21). One end of the resistance-capacitance buck circuit (11) is connected to the power frequency alternating current. The other end of the resistance-capacitance buck circuit (11) is connected to an input terminal of the half-wave rectifying circuit (12). An output terminal of the half-wave rectifying circuit (12) is connected to an input terminal of the triode amplifier output circuit (21). An output terminal of the triode amplifier output circuit (21) acts as an output terminal of zero-crossing signals, and is connected to the single-chip machine (3). The detection circuit has a simple structure, and the circuit has low power consumption.

IPC Classes  ?

• G01R 19/175 - Indicating the instants of passage of current or voltage through a given value, e.g. passage through zero
• G01R 15/00 - Details of measuring arrangements of the types provided for in groups , or

Abstract

An evaporator device of an indoor unit of an air conditioner comprises a base (1) and an outer cover (3). The base (1) and the outer cover (3) form an air passage. The evaporator device further comprises a cross-flow fan (2) and an evaporator (4) in the air passage. The cross-section of the evaporator (4) is a curved surface. The evaporator (4) is fixed on the base (1) and uniformly surrounds the cross-flow fan (2).

IPC Classes  ?

• F25B 39/02 - Evaporators
• F24F 13/30 - Arrangement or mounting of heat-exchangers
• F24F 3/06 - Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatmentApparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units

Abstract

Disclosed are a refrigerator powered by multiple energy sources and a power supply control method thereof. The main problem to be solved by the present invention is to perform integrated switching control of electrical power such as various low voltage energy sources, then boost same to a direct current relatively higher than the direct current after rectifying the utility power, access various current and commonly used converters and compressors, and finally realize the compatibility of the refrigerator with various energy sources. Provided is a refrigerator powered by multiple energy sources, including an MCU, a utility power supply module, a low voltage energy source power supply module, a storage battery power supply module, and an appliance control circuit, wherein the three power supply modules and the appliance control circuit are connected to the MCU, the three power supply modules are connected to each other in parallel and then connected to an integrated switching module, the integrated switching module is connected to the appliance control circuit and to the MCU, and the MCU performs centralized control on the three power supply modules and the appliance control circuit. The multiple energy source power supply control system in the present invention can realize the compatibility of the refrigerator with various energy sources and at the same time can greatly lower the cost and improve the reliability and universality of the product.

IPC Classes  ?

• F25D 11/00 - Self-contained movable devices associated with refrigerating machinery, e.g. domestic refrigerators
• F25D 29/00 - Arrangement or mounting of control or safety devices
• F24J 2/00 - Use of solar heat, e.g. solar heat collectors (distillation or evaporation of water using solar energy C02F 1/14;roof covering aspects of energy collecting devices E04D 13/18;devices for producing mechanical power from solar energy F03G 6/00;semiconductor devices specially adapted for converting solar energy into electrical energy H01L 31/00;photovoltaic [PV] cells including means directly associated with the PV cell to utilise heat energy H01L 31/525;PV modules including means associated with the PV module to utilise heat energy H02S 40/44)

Abstract

An indoor unit of an air conditioner comprises an indoor unit body (3) hinge-connected to a rotary base (1). A driving wheel (2) capable of driving the indoor unit body (3) to swing about a hinge shaft is disposed on the rotary base (1). An air outlet (4) is disposed on the back side of the indoor unit body (3).

IPC Classes  ?

• F24F 13/32 - Supports for air-conditioning, air-humidification or ventilation units
• F24F 1/00 - Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station

Abstract

A defrosting and frequency variable heat pump/air conditioning apparatus comprises an indoor machine (20) and an outdoor machine (10), with the outdoor machine (10) comprising a condenser (1), a fan (2), a four way switching valve (3), a throttle mechanism (5) and a compressor (5), wherein the condenser (1) has one end thereof connected to the indoor machine (20) via a connection pipeline (7), and the other end thereof connected with the compressor (8) and the indoor machine (20) via the four way valve (3), cut-off valves (6) are provided between the indoor machine (20) and both the condenser (1) and the four way valve (3), the throttle mechanism (5) is provided between the cut-off valve (6) in the connection pipeline (7) and the condenser (1), and a pipeline heater (4) is provided between the throttle mechanism (5) and the condenser (1).

IPC Classes  ?

• F25B 47/02 - Defrosting cycles
• F25B 29/00 - Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
• F25B 30/00 - Heat pumps

Abstract

An all-weather energy-saving method and device for a refrigerator and an all-weather energy-saving refrigerator are disclosed. The method comprises: obtaining a real-time external ambient temperature by using a temperature sensor, and controlling the operations of a fan and a compressor according to the external ambient temperature. The device comprises: an external ambient temperature obtaining module which is used to obtain a real-time external ambient temperature, and an operation control module which is used to control the operations of a fan and a compressor according to the external ambient temperature. The refrigerator comprises: a temperature sensor which is arranged at the outer surface of the refrigerator and used to detect an external ambient temperature, an external ambient temperature obtaining module which is connected with the temperature sensor and used to obtain a real-time external ambient temperature, and an operation control module which is connected with the external ambient temperature obtaining module and used to control the operations of a fan and a compressor according to the external ambient temperature. The applications of the method and the device result in a decreased temperature gradient in the refrigerating compartment of the refrigerator and more even temperature distribution in the refrigerator, thereby the temperature match among the compartments of the refrigerator is kept constantly.

IPC Classes  ?

• F25D 29/00 - Arrangement or mounting of control or safety devices
• F25D 11/02 - Self-contained movable devices associated with refrigerating machinery, e.g. domestic refrigerators with cooling compartments at different temperatures

Abstract

A fastening structure for a handle part includes a handle (2) provided on the door shell (1) and a foamed layer provided in the door shell (1). The structure also comprises a fastening block (3) connected to the handle (2) and a reinforcing iron part (6) provided between the door shell (1) and the foamed layer. The fastening block (3) is passed through a through hole (11) formed in the door shell (1), and is in snap-fit engagement with the reinforcing iron part (6) fixed on the foamed layer. The reinforcing iron part (6) includes a self-locking elastic retainer (61) and a fastening block inserting hole (62). The fastening block (3) is pressed and clamped in the fastening block inserting hole (62) by the self-locking elastic retainer (61). The structure is easy to install and has high reliability.

IPC Classes  ?

• F25D 23/02 - DoorsCovers
• E05B 1/00 - Knobs or handles for wingsKnobs, handles, or press buttons for locks or latches on wings
• F16B 21/09 - Releasable fastening devices with a stud engaging a keyhole slot

Goods & Services

Refrigerators; ice chests; air conditioning installations; cooling installations and machines; water heaters; electric kettles; air humidifiers; bakers' ovens; electric heating apparatus; water purifying apparatus and machines.

Abstract

The present invention discloses a liquid crystal display method, which can adjust the brightness of different segments of backlight according to the different images. Especially, the present invention discloses a liquid crystal display method, which includes: receiving a image signal; analyzing the image signal; dividing the image into at least two image segments according to the analysis result of the image signal; dividing the backlight into at least two backlight segments according to the division result of the image; adjusting the brightness of the backlight in each backlight segment; adjusting the image signal in each image segment. The liquid crystal display method of the present invention divide the image and the backlight according to the image signal, while adjusting the brightness of the image and backlight in each segment to not only decrease the power consumption of the liquid crystal display, but also increase the contrast of the image signal, thereby improving the effect of liquid crystal display.

IPC Classes  ?

• G09G 3/36 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix by control of light from an independent source using liquid crystals