CN2476042Y - Liquid crystal display for household electrical appliance - Google Patents
Liquid crystal display for household electrical appliance Download PDFInfo
- Publication number
- CN2476042Y CN2476042Y CN 01223156 CN01223156U CN2476042Y CN 2476042 Y CN2476042 Y CN 2476042Y CN 01223156 CN01223156 CN 01223156 CN 01223156 U CN01223156 U CN 01223156U CN 2476042 Y CN2476042 Y CN 2476042Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- household electrical
- liquid crystal
- electrical appliances
- cpu
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 23
- 239000013078 crystal Substances 0.000 claims abstract description 8
- 238000004891 communication Methods 0.000 claims abstract description 6
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 239000004988 Nematic liquid crystal Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 238000004378 air conditioning Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001795 light effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
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- Liquid Crystal Display Device Control (AREA)
- Liquid Crystal (AREA)
Abstract
The utility model provides a liquid crystal display for household appliances, which comprises a display liquid crystal and a backlight component; the backlight assembly includes a Cold Cathode Fluorescent Lamp (CCFL), a backlight plate and a circuit board; the circuit board is provided with a microprocessor (CPU), a CCFL backlight driving circuit, a reset/crystal oscillator circuit, a liquid crystal display driving circuit and a data communication circuit for data transmission between the CPU and the household appliance main control circuit, wherein the CCFL backlight driving circuit, the reset/crystal oscillator circuit and the liquid crystal display driving circuit are controlled by the CPU. Implement the utility model discloses a LCD for household electrical appliances, the light distribution in a poor light is even, and the contrast is big, shows clearly and can obtain lifelike color display effect.
Description
The utility model relates to a kind of LCD, especially relates to the LCD that is used for home appliance.
On home appliances such as air conditioner, refrigerator, electric cooker, washing machine, micro-wave oven, stereo set, usually need to use LCD, with instruction time, running parameter etc.LCD generally comprises and shows liquid crystal and backlight assembly.In the prior art, the LCD on the home appliance generally is to adopt light emitting diode (LED) or cold light film (EL) backlight technology, and its contrast is not strong, brightness is clear inadequately, especially when using on the split-type air conditioner air conditioner indoor machine,, be difficult to see clearly because distance is far away.In addition, because contrast backlight is not strong, the display color of LCD is true to nature inadequately and abundant.
The purpose of this utility model is to overcome the deficiencies in the prior art part, and a kind of clear display is provided, and display color enriches household electrical appliances LCD true to nature.
The purpose of this utility model is achieved in that a kind of household electrical appliances LCD, comprises showing liquid crystal and backlight assembly; Described backlight assembly comprises cold cathode fluorescent lamp (CCFL), backlight and circuit board; Described circuit board is provided with microprocessor (CPU), by the CCFL backlight drive circuit of described CPU control, reset/crystal oscillating circuit and liquid crystal display drive circuit, and the data communication circuit that between CPU and household electrical appliances governor circuit, carries out data transmission.
According to household electrical appliances LCD of the present utility model, it is characterized in that described demonstration liquid crystal is provided with the light modulation sheet.
In working order down, by described data communication circuit, CPU discerns, analyzes, judges the status data of the household electrical appliances that transmitted by the household electrical appliances governor circuit, thereby control CCFL backlight drive circuit and liquid crystal display drive circuit show the various state parameters of household electrical appliances on LCD.
Implement household electrical appliances LCD of the present utility model, owing to used the CCFL backlight technology, distribution of light backlight is even, and contrast is big, clear display.Simultaneously, because contrast backlight is big,, can obtain colored display effect true to nature by using the light modulation sheet.
Below in conjunction with drawings and Examples, the utility model is described in more detail.
Fig. 1 is the structural representation of the utility model household electrical appliances with an embodiment of LCD;
Fig. 2 is the schematic block circuit diagram that household electrical appliances shown in Figure 1 are used LCD;
Fig. 3 is the physical circuit connection layout of schematic block circuit diagram shown in Figure 2.
As shown in Figure 1, household electrical appliances LCD of the present utility model is to be used for air conditioner, comprises showing liquid crystal 11, light modulation sheet 12 and backlight assembly.Backlight assembly comprises cold cathode fluorescent lamp (CCFL) 13, backlight 14 and circuit board (PCB) 15.Backlight 14 is arranged on the back side that shows liquid crystal 11, cold cathode fluorescent lamp 13 is arranged on the side of backlight 14, and the light that cold cathode fluorescent lamp 13 sends is through the leaded light effect of backlight 14, be evenly distributed on the back side that shows liquid crystal, produce evenly soft effect backlight.Show that liquid crystal 11 adopts full impregnated super-twist nematic (STN) dot matrix or segmentation liquid crystal, can both clearly see displaying contents on the liquid crystal in any angular field of view.Light modulation sheet 12 is arranged on the surface that shows liquid crystal 11, because CCFL light by selecting the material and the angle of light modulation sheet, can be realized colored display effect for synthetic light.
As shown in Figures 2 and 3, described circuit board 15 is provided with M3850 type microprocessor (CPU) 1, CCFL backlight drive circuit 5, reset/crystal oscillating circuit 2, liquid crystal display drive circuit 4, and the data communication circuit 3 that between CPU1 and air-conditioning governor circuit, carries out data transmission.
Reset/crystal oscillating circuit 2 is made up of 555 chips and peripheral circuit thereof, and its effect is to make CPU1 be in original state; In addition, reset/crystal oscillating circuit 2 also has the function of watchdog circuit, the signal of the reflection CPU running state of programs of pin 5 outputs of monitoring CPU1, in case abnormal signal, 555 chips promptly produce the secondary reset signal, make CPU1 get back to original state.
Data communication circuit 3 receives the various air-conditioning status datas that the air conditioner governor circuit transmits, and sends to CPU1 then.After CPU1 discerns, analyzes, judges data, 4 work of control liquid crystal display drive circuit.
CCFL backlight drive circuit 5 comprises inverter circuit and chip controls circuit, and wherein, inverter circuit mainly is made up of a switch transformer TR1 and two power transistor Q1, Q2.CCFL backlight drive circuit 5 receives the output signal of the pin two 2 of CPU1, by the unlatching of chip controls circuit control low-voltage DC; The start-up circuit of being made up of inductance L 3, resistance R 1, R3 and capacitor C 1 makes transistor Q1, Q2 alternately open and close apace again, boosts through step-up transformer TR1 again, convert low-voltage DC to AC high voltage, thereby it is luminous to drive CCFL.
Like this, after the normal startup of air-conditioning, just can control LCD, the various state parameters of air-conditioning are shown on LCD by circuit.LCD contrast of the present utility model is big, clear display, and color is true to nature abundant.
Claims (8)
1. a household electrical appliances LCD comprises showing liquid crystal and backlight assembly; Described backlight assembly comprises cold cathode fluorescent lamp (CCFL), backlight and circuit board; Described circuit board is provided with microprocessor (CPU), by the CCFL backlight drive circuit of described CPU control, reset/crystal oscillating circuit and liquid crystal display drive circuit, and the data communication circuit that between CPU and household electrical appliances governor circuit, carries out data transmission.
2. household electrical appliances LCD according to claim 1 is characterized in that: described demonstration liquid crystal is provided with the light modulation sheet.
3. household electrical appliances LCD according to claim 1 and 2 is characterized in that: described household electrical appliances are air conditioner.
4. household electrical appliances LCD according to claim 1 and 2 is characterized in that: described demonstration liquid crystal adopts full impregnated super-twist nematic liquid crystal.
5. household electrical appliances LCD according to claim 1 and 2 is characterized in that: it is the microprocessor of M3850 that described CPU adopts model.
6. household electrical appliances LCD according to claim 1 and 2 is characterized in that: described resetting/crystal oscillating circuit is made up of 555 chips and peripheral circuit thereof, monitors the signal of reflection CPU running state of programs of pin 5 output of described CPU.
7. household electrical appliances LCD according to claim 1 and 2 is characterized in that: described CCFL backlight drive circuit comprises inverter circuit and chip controls circuit; Described CCFL backlight drive circuit receives the output signal of the pin two 2 of described CPU, by the unlatching of chip controls circuit control low-voltage DC, and converts low-voltage DC to AC high voltage by inverter circuit, and it is luminous to drive described CCFL.
8. household electrical appliances LCD according to claim 7 is characterized in that: described inverter circuit mainly is made up of a switch transformer TR1 and two power transistor Q1, Q2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01223156 CN2476042Y (en) | 2001-05-29 | 2001-05-29 | Liquid crystal display for household electrical appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01223156 CN2476042Y (en) | 2001-05-29 | 2001-05-29 | Liquid crystal display for household electrical appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2476042Y true CN2476042Y (en) | 2002-02-06 |
Family
ID=33639796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01223156 Expired - Lifetime CN2476042Y (en) | 2001-05-29 | 2001-05-29 | Liquid crystal display for household electrical appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2476042Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100440007C (en) * | 2003-09-04 | 2008-12-03 | 三星电子株式会社 | Apparatus for monitoring a lamp, system having the same for monitoring a lamp, blacklight assembly having the same and liquid crystal display apparatus having the same |
-
2001
- 2001-05-29 CN CN 01223156 patent/CN2476042Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100440007C (en) * | 2003-09-04 | 2008-12-03 | 三星电子株式会社 | Apparatus for monitoring a lamp, system having the same for monitoring a lamp, blacklight assembly having the same and liquid crystal display apparatus having the same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20110529 Granted publication date: 20020206 |