1. A light emitting OLED apparatus comprising a microcavity OLED device having a broad-band light emitting organic EL element and configured to have angular-dependent narrow-band light emission, and a patterned light-integrating element comprising a light-integrating portion and a non-light-integrating portion each provided over a portion of a light emitting region of the microcavity device, wherein the light-integrating portion of the light-integrating element integrates the angular-dependent narrow-band emission from different angles from the microcavity OLED device to form an integrated light emission with decreased angular dependence in accordance with the pattern of the light-integrating portion of the light-integrating element, and the apparatus maintains relatively angular-dependent emission for light emitting regions of the microcavity device not provided with the light-integrating portion of the light-integrating element.
2. The light emitting OLED apparatus of claim 1 wherein the microcavity OLED device comprises:
a) a substrate having a first surface and a second surface;
b) a metallic bottom electrode disposed over the first surface of the substrate;
c) a metallic top electrode spaced from the metallic bottom electrode;
d) a broad-band light emitting organic EL element disposed between the metallic top electrode and the metallic bottom electrode, wherein each of the metallic electrodes are at least partially reflective and at least one of the metallic electrodes is semitransparent; and
e) wherein the metallic electrodes form a microcavity structure that converts the broad-band light emission into angular-dependent narrow-band light.
3. The light emitting OLED apparatus of claim 2, wherein at least one of the metallic electrodes is substantially opaque and reflective.
4. The light emitting OLED apparatus of claim 2, wherein each of the metallic electrodes are semitransparent and partially reflective.
5. The light emitting apparatus of claim 2 where a spacing layer is placed between the top and bottom electrodes.
6. The light emitting apparatus of claim 5 where the thickness of the spacing layer is uniform.
7. The light emitting apparatus of claim 5 where the thickness of the spacing layer is non-uniform.
8. The light emitting apparatus of claim 7 where the non-uniformity is random.
9. The light emitting apparatus of claim 7 where the non-uniformity is patterned.
10. The light emitting apparatus of claim 2 where the top and bottom electrodes are patterned to form a passive matrix of individual light emitting elements.
11. The light emitting OLED apparatus of claim 1 wherein the organic EL element comprises multiple light emitting layers.
12. The light emitting OLED apparatus of claim 1 wherein the organic EL element has a stacked structure.
13. The light emitting OLED apparatus of claim 1 wherein the light-integrating element is spaced from the microcavity OLED device.
14. The light emitting OLED apparatus of claim 1 wherein the light-integrating element is attached to the microcavity OLED device.
15. The light emitting OLED apparatus of claim 1 wherein the light-integrating element has a light scattering structure patterned over a portion of a light emitting region of the microcavity device.
16. The light emitting OLED apparatus of claim 1 wherein the light-integrating element comprises a surface light scattering structure patterned over a portion of a light emitting region of the microcavity device.
17. The light emitting OLED apparatus of claim 1 wherein the light-integrating element comprises lens elements patterned over a portion of a light emitting region of the microcavity device.
18. The light emitting OLED apparatus of claim 1 wherein the light-integrating element comprises a diffusing reflecting element patterned over a portion of a light emitting region of the microcavity device.
19. The light emitting OLED apparatus of claim 1 wherein the microcavity OLED device has two or more emitting regions each one of which is tuned to emit a different angular-dependent narrow-band emission spectrum.
20. The light emitting OLED apparatus of claim 1 wherein the microcavity OLED device has two or more emitting regions with at least one region having a peak emission wavelength larger than 550 nm and one region having a peak emission wavelength less than 550 nm.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A system for controlling fan speed in a cooling system of a vehicle, the system comprising:
a cooling module positioned within an engine compartment of the vehicle;
a cooling fan mounted in front of the cooling module; and,
a control strategy for controlling operation of the cooling fan based on engine operating conditions.
2. The system of claim 1, wherein the cooling module includes a radiator, a charge air cooler and a condenser.
3. The system of claim 1, wherein the cooling fan is a hydraulically driven fan.
4. The system of claim 1, wherein the control strategy includes a plurality of sensors for controlling operation of the cooling fan.
5. The system of claim 4, wherein the sensors include a coolant temperature sensor, an intake air sensor and an AC high side pressure sensor
6. The system of claim 4, wherein the sensor with a highest signal controls the operation of the cooling fan.
7. The system of claim 6, wherein controlling the operation of the cooling fan includes controlling a speed level of the cooling fan.
8. The system of claim 7, wherein the speed level of the cooling fan increase and decreases proportionally based on the AC high side pressure sensor readings.
9. The system of claim 8, wherein the AC high side pressure sensor further includes a pressure transducer for converting any applied pressure into an electrical signal for controlling the speed level of the cooling fan.
10. A fan speed control system for use in a cooling system of an engine, the system comprising:
a cooling module mounted within an engine compartment of the engine, the cooling module comprising a radiator coupled to a charge air cooler coupled to an AC condenser;
a variable speed cooling fan mounted in front of the cooling module; and,
a control strategy for controlling operation of the cooling fan, wherein the control strategy includes at least one sensor producing an electrical signal for increasing and decreasing the speed of the cooling fan based on the signal reading.
11. The system of claim 10, wherein the sensor is pressure sensor connected to a high pressure side of an AC system of the cooling system of the engine.
12. A method for controlling speed of a fan in a cooling system of an engine, the method comprising the steps of:
providing an AC system having a high pressure side and a low pressure side;
providing at least one sensor on the high pressure side for producing an electrical signal in response to an operating condition;
determining which sensor has a highest electrical signal value;
presenting the highest signal value to the fan; and,
controlling the speed of the fan based the highest electrical signal value while minimizing engine performance penalties.
13. The method of claim 12, wherein the sensor includes a pressure transducer for converting applied pressure from the high pressure side of the AC system into the highest signal value.
14. The method of claim 12, wherein the step of determining which sensor has the highest electrical signal value based on engine conditions further includes selecting the highest electrical signal value from one of the engine conditions including a coolant temperature sensor, an intake air temperature sensor and AC system high side pressure sensor.
15. The method of claim 12, wherein the step of controlling the speed of the fan includes increasing the speed of the fan in proportion to an increase in heat load requirements for an AC system.