Camera module thin film heater
The present invention provides a camera module thin film heater and a camera module having the same, the camera module thin film inhibiting and avoiding frost, condensation and freezing by reaching a target temperature of a lens within a short period of time, suppressing the generation of fire due to overheating even when operated in a high environment, and not including a temperature sensor and a temperature control unit, thereby greatly reducing the manufacturing cost. The camera module thin film heater comprising: an electrode; a thin film heating body electrically connected to the electrode and having a variable resistance corresponding to a heating temperature; and an insulating member surrounding the electrode and the thin film heating body.
1. A film heater comprising:
an insulation member comprising a base film and a cover film disposed above the base film;
a first heating structure disposed between the base film and the cover film and comprising a first electrode and a first film heating panel electrically connected to the first electrode; and
a second heating structure spaced apart from the first heating structure and comprising a second electrode and a second film heating panel electrically connected to the second electrode;
wherein resistance of the first film heating panel is configured to vary corresponding to a heating temperature and wherein a temperature of the first film heating panel does not rise to a designated temperature due to an increase of the resistance of the first film heating panel corresponding to an increase of the heating temperature, wherein when the temperature of the first film heating panel decreases, the resistance of the first film heating panel decreases to increase the temperature of first film heating panel such that the temperature of the first film heating panel is maintained within a predetermined range,
wherein the first electrode and the second electrode are so arranged as to face each other when viewed on a plane and are spaced apart from each other, and
wherein the first electrode comprises a first electrode pattern including a portion having a curved shape and another portion having a linear shape and a second electrode pattern having a curved shape, wherein the first film heating panel is disposed between the first electrode pattern and the second electrode pattern and two ends of the first film heating panel are electrically connected to the first electrode pattern and the second electrode pattern,
wherein each of the first film heating panel and the second film heating panel has a variable resistance corresponding to the heating temperature,
wherein the insulation member comprises an opening exposing a portion of each of the first and second electrodes, and
the film heater further comprising a third electrode disposed at an outside of the insulation member to be electrically connected to the first and second electrodes through the opening.
2. The film heater of claim 1 , comprising a transparent heater film, wherein the third electrode is electrically connected to the transparent heater film.
3. The film heater of claim 1 , wherein the second electrode comprises third and fourth electrode patterns electrically connected to the second film heating panel.
4. The film heater of claim 1 , wherein the cover film is bonded to the base film.
5. The film heater of claim 1 , wherein the first electrode and the second electrode are symmetrical to each other.
6. The film heater of claim 1 , wherein the film heating panel is formed in a curved shape.
7. A film heater comprising:
a base insulation film;
a cover insulation film coupled to the base insulation film;
a first heating structure disposed between the base insulation film and the cover insulation film and comprising a first electrode and a first film heating panel electrically connected to the first electrode; and
a second heating structure spaced apart from the first heating structure and comprising a second electrode and a second film heating panel electrically connected to the second electrode;
wherein resistance of the first film heating panel is configured to vary corresponding to a heating temperature and wherein a temperature of the first film heating panel does not rise to a designated temperature due to an increase of the resistance of the first film heating panel corresponding to an increase of the heating temperature,
wherein when the temperature of the first film heating panel decreases, the resistance of the first film heating panel decreases to increase the temperature of first film heating panel such that the temperature of the first film heating panel is maintained within a predetermined range, and
wherein the first electrode and the second electrode are so arranged as to face each other when viewed on a plane and are spaced apart from each other and wherein the first electrode comprises a first electrode pattern including a portion having a curved shape and another portion having a linear shape and a second electrode pattern having a curved shape, wherein the first film heating panel is disposed between the first electrode pattern and the second electrode pattern and two ends of the first film heating panel are electrically connected to the first electrode pattern and the second electrode pattern,
the film heater further comprising a third electrode disposed at an outside of the cover insulation film to be electrically connected to the first and second electrodes through an opening, and
a transparent heater film, wherein the third electrode is electrically connected to the transparent heater film.
8. The film heater of claim 7 , wherein each of the first film heating panel and the second film heating panel has a variable resistance corresponding to a heating temperature.
9. The film heater of claim 8 , wherein the cover insulation film comprises the opening exposing a portion of each of the first and second electrodes.