CN1012025B - Liquid crystal electro-optical control display device of driving and heating at same time - Google Patents
Liquid crystal electro-optical control display device of driving and heating at same timeInfo
- Publication number
- CN1012025B CN1012025B CN 85100082 CN85100082A CN1012025B CN 1012025 B CN1012025 B CN 1012025B CN 85100082 CN85100082 CN 85100082 CN 85100082 A CN85100082 A CN 85100082A CN 1012025 B CN1012025 B CN 1012025B
- Authority
- CN
- China
- Prior art keywords
- heating
- liquid crystal
- driving
- optical
- crystal electro
- 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
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Abstract
The present invention relates to a heating method for a liquid crystal photoelectric component, which belongs to the technical field of electronic display and photoelectric control. The aim of the present invention is to solve the problem that a liquid crystal photoelectric component is effectively and uniformly heated without photoelectric disturbance under the condition of low temperature. The present invention is mainly characterized in that an inner conducting film of the liquid crystal photoelectric component is used as an electric heating execution component, a photoelectric control circuit of the liquid crystal photoelectric component, which is formed by connecting an AC voltage source with a capacitor in series, is used, a DC power supply is used for heating through the inner conducting film, and the drawing 3 is disclosed. The present invention is suitable for a liquid crystal photoelectric control component made of various liquid crystals.
Description
This invention belongs to the driving of liquid crystal display and crystal crystal electro-optical controling device and the electric light control technology field that heating is carried out simultaneously.
The low-temperature working performance of improving liquid crystal electro-optical is the important use problem, at present openly specially permit the clear and 57(1982 of the clear 57-10119 of communique (A) according to the document of Japan) 1.19 propose when DC heating influence showing, the driving voltage switch to cut out and only use DC heating, be i.e. driving and heat and can not carry out simultaneously.Such liquid crystal electro-optical can not adapt to high precision electric light control technology.The method that adopts AC driving and DC heating to carry out simultaneously when the present invention's proposition is done heating resistor with transparency conductive electrode.
The purpose of this invention is that will to propose a kind of efficient high uniformity good, and no electric light harasses, simple and applied widely, drives and liquid crystal display and photoelectric eye that heating is carried out simultaneously.
Figure of description 1: liquid crystal electro-optical drives and display device is carried out in heating simultaneously.
In accompanying drawing 1: A, B are nesa coatings; E is the DC heating power supply; C is a partiting dc capacitor; V is an AC driven power.
The embodiment of this invention sees Fig. 1.Can call liquid crystal electro-optical internal conductive film heating means-abbreviation inner membrance heating to the present invention again according to implementing feature.The present invention is the driving conducting film A double as electrical heating execution unit that utilizes liquid crystal electro-optical, and has avoided power supply to harass problem by AC driving and DC heating, thereby the driving of realization crystal crystal electro-optical controling device is carried out simultaneously with heating.AC driving circuit is composed in series by AC power V and capacitor C; E is a direct supply, and it is used to heat crystal crystal electro-optical controling device.
For the driving efficient φ [or claiming voltage utilization] that guarantees AC power, the capacitance C of capacitor should meet following formula:
C＝ (φC
2)/(1－φ)
C in the formula
2It is the capacitance between liquid crystal electro-optical two drive electrodes.
Harass voltage for the direct current that heating power supply E is caused and be no more than tolerance value V
o, the leakage resistance R of capacitor C
cShould meet following formula:
R
c≥ (2σs)/(ad
sL) [ (th(aX
N))/(aX
N) (E)/(V
o) -1]
Wherein:
The resistivity of-electric conduction of heating film; σ
L-liquid crystal resistivity;
The thickness of-electric conduction of heating film; The d-thickness of liquid crystal layer;
The width of L-electric conduction of heating film; The a-coefficient;
X
NThe length of-electric conduction of heating film; E-heating voltage value.
As an example, according to actual test case of the present invention, calm and do not add the insulation measure+5 ℃ of physical environments in, the liquid crystal layer that makes 1 square centimeter is warmed up to+14 ℃ the heat power consumption that adds is about 42 milliwatts.The area approximation of heating power and tabular liquid crystal electro-optical is linear as follows:
P
E= 50/3 qs ((T
1-T
2))/(d
L)
In the formula: P
E-Jia thermoelectric (al) power
The coefficient of heat conductivity of q-liquid crystal electro-optical glass
S-liquid crystal electro-optical area
T
1-liquid crystal layer temperature
T
2-liquid crystal electro-optical surface temperature
d
L-liquid crystal electro-optical thickness
The real advantage of this invention is that to add heat power consumption little, and heating uniformity is good, and no electric light is harassed, and is simple. It is applicable to liquid crystal display, liquid crystal light valve and other liquid crystal electro-optical of the various screen sizes that various liquid crystal are made.
Claims (3)
1, a kind of driving and liquid crystal electro-optical display device that heating is carried out simultaneously, utilize the driving conducting film A of liquid crystal electro-optical, double as electro-optical device heating execution unit, adopt the AC driving DC heating, it is characterized in that, when heating, adopt AC power V and capacitor C to be connected into the liquid crystal electrooptical control circuit, realize driving and heating and carry out simultaneously by internal conductive film A.
2, the liquid crystal electro-optical display device that carries out simultaneously according to described driving of claim 1 and heating is characterized in that this capacitance is the capacitance C according to two drive ends of the driving efficient of alternating-current voltage source V and liquid crystal electro-optical
2Determine that its mathematical relation is:
C＝ (φC
2)/(1－φ)
3,, it is characterized in that the leakage resistance R of this capacitor capacitor C when heating according to described driving of claim 1 and the liquid crystal indicator that carries out simultaneously of heating
CDetermine and should satisfy:
R
c≥ (2σ)/(ad
sL) [ (th(aXN))/(aXN) (E)/(Vo) -1]
Wherein:
The resistivity of-electric conduction of heating film
The width of L-electric conduction of heating film
X
NThe length of-electric conduction of heating film
E-heating voltage value
V
OThe maximum that-liquid crystal electro-optical allows is harassed voltage
σ
L-liquid crystal resistivity
The d-thickness of liquid crystal layer
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85100082 CN1012025B (en) | 1985-04-01 | 1985-04-01 | Liquid crystal electro-optical control display device of driving and heating at same time |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85100082 CN1012025B (en) | 1985-04-01 | 1985-04-01 | Liquid crystal electro-optical control display device of driving and heating at same time |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85100082A CN85100082A (en) | 1986-07-16 |
| CN1012025B true CN1012025B (en) | 1991-03-13 |
Family
ID=4790868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85100082 Expired CN1012025B (en) | 1985-04-01 | 1985-04-01 | Liquid crystal electro-optical control display device of driving and heating at same time |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1012025B (en) |
-
1985
- 1985-04-01 CN CN 85100082 patent/CN1012025B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN85100082A (en) | 1986-07-16 |
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Legal Events
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |