Emitter, method of designing brightness of emitter, program for method of designing brightness of emitter, electrooptical device and electric device
An emitter includes a plurality of types of emission units (for example, EL elements) with different emission aging characteristics, which can obtain good emission conditions even after a certain usage time has elapsed. A method of designing the brightness and a program for designing the brightness of the emitter, an electrooptical device and an electric device are also provided. Initial brightnesses of the emission units are set such that a skew of emission lifetime between the emission units is within 20%.
1. An electrooptical device, comprising:
a plurality of types of emission units with different emission aging characteristics;
a circuit element section provided on a substrate and including a drive element;
a first electrode and a second electrode provided with each of the emission units on the circuit element section,
each of the emission units being provided between bank sections and between the first electrode and the second electrode, and
initial brightnesses and numerical apertures of the emission units being set such that a skew of decay curves of emission brightness of the emission units is within 20% until a prescribed point of time is reached.
2. An electrooptical device according to claim 1 , the electrocptical device being capable of displaying colors by constructing one picture element from an emission unit capable of developing a red color, an emission unit capable of developing a green color and an emission unit capable of developing a blue color, comprising:
a circuit element section provided on a substrate and including a drive element; and
a first electrode and a second electrode provided with each of the emission units on the circuit element section,
each of the emission units being provided between bank sections and between the first electrode and the second electrode, and
numerical apertures of the emission units satisfy the following equation:
a r :a g :a b =1:3-8:8-15
where a r is the numerical aperture of the emission unit capable of developing a red color, a g is the numerical aperture of the emission unit capable of developing a green color, and a b is the numerical aperture of the emission unit capable of developing a blue color.
3. An electrooptical device according to claim 2 , the skew of the decay curves of emission brightness between the emission units until a prescribed point of time is reached being determined based on a normalized decay curve obtained by dividing a decay curve of the emission brightness of each of the emission units by the initial brightness of the emission brightness.
4. An electric device, comprising:
the electrooptical device according to claim 1 .
5. A method of designing brightness of an electrooptical device, the electrooptical device comprising a plurality of types of emission units with different emission aging characteristics, a circuit element section provided on a substrate and including a drive element, and a first electrode and a second electrode provided with each of the emission units on the circuit clement section, each of the emission units being provided between bank sections and between the first electrode and the second electrode, the method comprising:
performing an initial value determination process and a numerical aperture determination process to respectively set initial brightness of each of the emission units and a numerical aperture for each of the emission units such that a skew of decay curves of emission brightness of the emission units is within 20% until a prescribed point of time is reached.
6. A method of designing brightness of an electrooptical device according to claim 5 , the skew of the decay curves of emission brightness of the emission units until a prescribed point of time is reached being determined based on a normalized decay curve obtained by dividing a decay curve of the emission brightness of each of the emission units by the initial brightness of the emission brightness.
7. A program for designing brightness of an electrooptical device, the electrooptical device comprising a plurality of types of emission units with different emission aging characteristics, a circuit element section provided on a substrate and including a drive element, and a first electrode and a second electrode provided with each of the emission units on the circuit element section, each of the emission units being provided between bank sections and between the first electrode and the second electrode, the program comprising:
performing by computer an initial value determination process and a numerical aperture determination process to respectively set initial brightness of each of the emission units and a numerical aperture for each of the emission units such that a skew of decay curves of emission brightness of the emission units is within 20% until a prescribed point of time is reached.
8. A program for designing brightness of an electrooptical device according to claim 7 , the skew of the decay curves of emission brightness of the emission units until a prescribed point of time is reached being determined based on a normalized decay curve obtained by dividing a decay curve of the emission brightness of each of the emission units by the initial brightness of the emission brightness.