1. A display device comprising:
a pixel including a light emitting element and a plurality of memory circuits;
a display portion including a plurality of the pixels;
a plurality of decoders for controlling the display portion;
a display control circuit for controlling the plurality of the decoders;
means for selecting one or more of the memory circuits by using the plurality of decoders with an electrical signal; and
means for writing a digital signal into the memory circuit selected by the plurality of the decoders.
2. The display device according to claim 1, wherein each of the pixels includes a display memory circuit and a write memory circuit.
3. The display device according to claim 1, wherein the display control circuit includes:
means for reading out a first digital signal stored in a first display memory circuit so as to send it to the light emitting element;
means for inputting a second digital signal to a first write memory circuit;
means for switching the first display memory circuit to a second write memory circuit, and switching the first write memory circuit to a second display memory circuit; and
means for intermitting a period that is from the input of the second signal until the input of a third signal.
4. The display device according to claim 1, wherein the display control circuit further includes:
means for making the light emitting element disposed in the pixel to emit light through the display control signal line; and
means for controlling a light emitting period of the light emitting element.
5. The display device according to claim 1, wherein the display control circuit further includes means for expressing gray scales by controlling a light emitting period of the light emitting element in accordance with each bit of the digital signal.
6. The display device according to claim 1, wherein the display control circuit further includes:
means for receiving digital signals in a regular cycle;
means for writing data in a reception cycle that comes first in a frame period is written to the write memory circuit in the case where no writing is performed to the write memory circuit at the beginning of the frame period;
means for displaying identical data in two frame periods in the case where the reception cycle overlaps the two frame periods; and
means for intermitting the display after the frame period until the complete reception of digital signals for one frame.
7. The display device according to claim 1, wherein:
the display control circuit and the plurality of the decoders are connected to each other through an address line;
each of the plurality of the decoders includes a shift register;
means for transferring an address signal from the display control circuit to the shift register through the address signal is provided; and
means for decoding the address signal in the shift register is provided.
8. The display device according to claim 7, wherein:
the display control circuit includes an address counter for generating the address signal and an image processing register; and
the image processing register includes means for storing image processing information and means for changing the operating method of the address counter in accordance with the image processing information.
9. The display device according to claim 8, wherein the image processing register includes a volatile memory.
10. The display device according to claim 8, wherein the image processing register includes a non-volatile memory.
11. The display device according to claim 1, wherein the memory circuit includes a volatile memory.
12. The display device according to claim 1, wherein the memory circuit includes a non-volatile memory.
13. A driving method of a display device, wherein:
a display control circuit disposed on the periphery of the display device controls a plurality of decoders in the display device;
the plurality of the decoders selects one or more of memory circuits in each of a plurality of pixels disposed in the pixel portion using an electrical signal; and
a digital signal is written to the selected memory circuit so as to make a light emitting element in each of the plurality of the pixels to emit light.
14. The driving method of the display device according to claim 13, wherein:
the control circuit reads out a first digital signal stored in a display memory circuit in each of the plurality of the pixels so as to transfer it to a light emitting element;
a second digital signal is inputted to a write memory circuit in each of the plurality of the pixels;
functions of the display memory circuit and the write memory circuit are switched; and
a period that is from the input of the second digital signal until the input of the third digital signal is intermission.
15. The driving method of the display device according to claim 13, wherein the control circuit expresses gray scales by changing a light emitting time of the light emitting element in accordance with each bit of the digital signal.
16. The driving method of the display device according to claim 13, wherein:
the display control circuit receives digital signals in a regular cycle;
data in a reception cycle that comes first in a frame period is written to the write memory circuit in the case where no writing is performed to the write memory circuit at the beginning of the frame period;
identical data is displayed in two frame periods in the case where the reception cycle overlaps the two frames; and
display is intermitted in the period after the frame period until the complete reception of digital signals for one frame.
17. The driving method of the display device according to claim 13, wherein:
the display circuit transfers an address signal to a shift register in each of the plurality of the decoders through an address line; and
the address signal is decoded in the shift register.
18. A display device comprising:
a plurality of pixels;
a decoder electrically connected to the plurality of the pixels;
an address latch circuit electrically connected to the decoder;
an address controller electrically connected to the address latch circuit;
a signal latch circuit electrically connected to the plurality of the pixels;
a write control circuit electrically connected to the signal latch circuit, the address latch circuit and the address controller; and
a display control circuit electrically connected to the plurality of the pixels and the write control circuit.
19. The display device according to claim 18, wherein each of the plurality of the pixels includes:
a light emitting element;
a first switch electrically connected to the light emitting element;
a plurality of memory circuits electrically connected to the first switch;
a second switch electrically connected to the plurality of the memory circuits; and
a signal line electrically connected to the second switch and the decoder.
20. The display device according to claim 19, wherein each of the plurality of the memory circuits includes a display memory circuit and a write memory circuit.
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. An LED module comprising:
an LED having a central axis I;
a lens covering the LED, the lens having an light incident face for incidence of the light of the LED and an opposite light emitting face for refracting the light of the LED out of the lens when the light extends through the lens; and
a three dimensional coordinate system consisting of an X axis, a Y axis, a Z axis and an origin O, wherein the origin O is located in a center of the LED, the X axis extends from the origin O and corresponds to a lengthwise direction of the lens, the Y axis extends from the origin O and corresponds to a widthwise direction of the lens, the Z axis extends from the origin O and corresponds to a height direction of the lens, the central axis I is coincident with the Z axis;
wherein the light emitting face of the lens has a central axis II, the central axis II is parallel to and offsets from the central axis I, and the central axis II is located at a side of a plane ZOX;
wherein light beams emitted out from the light emitting face of the lens at the side of the plane ZOX through which the central axis II extends are stronger than light beams emitted out from the light emitting face of the lens at another side of the plane ZOX.
2. The LED module of claim 1, wherein the light emitting face comprises two ellipsoid surfaces and a combination curved surface located between and connecting the two ellipsoid surfaces.
3. The LED module of claim 2, wherein the combination curved surface extends along the lengthwise direction of the lens, a width of the combination curved surface of the light emitting face decreases from two ends to a middle thereof in the lengthwise direction of the lens, the two ellipsoid surfaces are arranged at two sides of the widthwise direction of the lens, and a width of each ellipsoid surface increases gradually from two ends to a middle thereof in the lengthwise direction of the lens.
4. The LED module of claim 1, wherein the light emitting face is symmetrical relative to a plane YOZ along the widthwise direction of the lens, the light emitting face is symmetrical relative to a plane K wherein the plane K extends through the central axis II and is parallel to the plane ZOX, and the plane K is located at the side of the plane ZOX through which the central axis II extends.
5. The LED module of claim 1, wherein the light incident face is substantially spheroidal surface in profile, the light incident face has a central axis III, the central axis III is coincident with the Z axis, the light incident face is symmetrical relative to a plane YOZ along the lengthwise direction of the lens, the light incident face is symmetrical relative to the plane ZOX along the widthwise direction of the lens.
6. The LED module of claim 1, wherein the central axis II of the light emitting face is located on a plane YOZ.
7. The LED module of claim 1, wherein the light incident face is further recessed towards the light emitting face to form a spherical surface at the another side of the plane ZOX, and the spherical surface is symmetrical relative to a plane YOZ along the lengthwise direction of the lens.
8. The LED module of claim 1, wherein the light emitting face is formed on a top of the lens, a recess is defined in a bottom of the lens, and the light incident face is formed on an inner surface of the recess.
9. The LED module of claim 8, wherein the LED comprises a substrate, an LED chip and an encapsulation unit, the LED chip is received in the substrate, the encapsulation unit encapsulates the LED chip, a top surface of the encapsulation unit forms a light emitting surface of the LED, and the light emitting surface of the LED is spaced from the light incident face of the lens thereby defining a gap therebetween.
10. The LED module of claim 9, wherein the light emitting surface of the LED is substantially planar in profile and coplanar with a top surface of the substrate.
11. The LED module of claim 9, wherein a bottom of the lens is recessed to define a first receiving groove thereby forming a first positioning surface in the first receiving groove, the first positioning surface is further recessed towards the light emitting face to define a second receiving groove thereby forming a second positioning surface in the second receiving groove, the second positioning surface is further recessed towards the light emitting face to define the recess, the substrate extends outwardly a flange at a bottom thereof, the substrate is received in the second receiving groove, a top surface of the substrate resists on the second positioning surface, the flange is received in the first receiving groove, and a top surface of the flange resists on the first positioning surface.
12. The LED module of claim 8, wherein the light incident face is intersected with the bottom of the lens to form an elliptical contour line, a minor axis of the elliptical contour line corresponds to the lengthwise direction of the lens, a major axis of the elliptical contour line corresponds to the widthwise direction of the lens, and a center of the elliptical contour line is located in the Z axis.
13. The LED module of claim 1, wherein the lens comprises a supporting portion at a bottom thereof, a light conductive portion at a top thereof and a connecting portion between the supporting portion and the light conductive portion, the light conductive portion bias away from one side of the connecting portion, and the light emitting face of the lens is formed on an outer surface of the light conductive portion.
14. The LED module of claim 1, wherein the lens is configured for making an illumination area of the LED module to be substantially elongated in profile, a center portion of one long side of the illumination area is inwardly depressed towards another long side of the illumination area, and a center portion of the another long side of the illumination area is outwardly protruded.