Circuits for controlling display apparatus

• US 9,530,344 B2
• Filed: 06/24/2015
• Issued: 12/27/2016
• Est. Priority Date: 02/23/2005
• Status: Active Grant

• Current Assignee: Snaptrack Incorporated (Qualcomm, Inc.)
• Original Assignee: Snaptrack Incorporated (Qualcomm, Inc.)
• Inventors: Gandhi, Jignesh, Steyn, Jasper Lodewyk, Fijol, John J., Barton, Roger W., Lewis, Stephen R., McAllister, Abraham, Hagood, Nesbitt W. IV
• Primary Examiner(s): Edwards, Carolyn R
• Assistant Examiner(s): Said, Mansour M
• Application Number:
  US14/749,176
• Publication Number:
  US 20150294613A1
• Time in Patent Office: 552 Days
• US Class Current: 1/1
• CPC Class Codes: G01J 3/0232 using shutters
• CPC Class Codes: G01J 3/027 Control of working procedures of a spectrometer; Failure detection; Bandwidth calculation
• CPC Class Codes: G02B 26/001 based on interference in an adjustable optical cavity interference filters G02B5/28; devices or arrangements using multiple reflections in spectrometry or monochromators G01J3/26
• CPC Class Codes: G02B 26/004 based on a displacement or a deformation of a fluid
• CPC Class Codes: G02B 26/04 by periodically varying the intensity of light, e.g. using choppers shutters, diaphragms for cameras G03B9/00; devices for eliminating or reducing the effect of flicker in projection systems G03B21/40
• CPC Class Codes: G06F 3/147 using display panels
• CPC Class Codes: G09G 2300/08 Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
• CPC Class Codes: G09G 2300/0814 used for selection purposes, e.g. logical AND for partial update
• CPC Class Codes: G09G 2300/0842 forming a memory circuit, e.g. a dynamic memory with one capacitor
• CPC Class Codes: G09G 2300/0857 Static memory circuit, e.g. flip-flop
• CPC Class Codes: G09G 2300/0885 Pixel comprising a non-linear two-terminal element alone in series with each display pixel element
• CPC Class Codes: G09G 2310/0235 Field-sequential colour display
• CPC Class Codes: G09G 2310/0251 Precharge or discharge of pixel before applying new pixel voltage
• CPC Class Codes: G09G 2310/0254 Control of polarity reversal in general, other than for liquid crystal displays
• CPC Class Codes: G09G 2310/0262 The addressing of the pixel, in a display other than an active matrix LCD, involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependent on signals of two data electrodes
• CPC Class Codes: G09G 2310/063 Waveforms for resetting the whole screen at once
• CPC Class Codes: G09G 2320/0646 Modulation of illumination source brightness and image signal correlated to each other
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 2360/144 the light being ambient light
• CPC Class Codes: G09G 3/2011 by amplitude modulation
• CPC Class Codes: G09G 3/2014 : by modulation of the duration of a single pulse during which the logic level remains constant
• CPC Class Codes: G09G 3/2022 : using sub-frames
• CPC Class Codes: G09G 3/2081 : with combination of amplitude modulation and time modulation space and time error diffusion G09G3/2066
• CPC Class Codes: G09G 3/3406 : Control of illumination source illumination devices structurally associated with liquid crystal cells G02F1/1336
• CPC Class Codes: G09G 3/3413 : Details of control of colour illumination sources
• CPC Class Codes: G09G 3/3433 : using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices using liquid crystal devices G09G3/36; using electrochromic devices G09G3/38
• CPC Class Codes: G09G 3/3473 : based on light coupled out of a light guide, e.g. due to scattering, by contracting the light guide with external means
• CPC Class Codes: G09G 3/348 : based on the deformation of a fluid drop, e.g. electrowetting

Abstract

A method of operating a display including loading image data to pixels in multiple rows of pixels in an array of pixels during a data loading phase, actuating the pixels in the multiple rows during an update phase, and illuminating at least one lamp during an lamp illumination phase to illuminate the actuated pixels to form an image on the display, in which each of the loading, actuating and illuminating phases partially overlap in time.

Claims

1. A display comprising:

an array of pixels, each of the pixels having a corresponding light blocking element;

one or more light sources to direct light toward the pixels to form an image on the display; and

a controller circuit capable of providing data to;

actuate the light blocking elements during a first update phase comprising a first sub-phase corresponding to a first transition of a light blocking element and a second sub-phase corresponding to a second transition of the light blocking element,

illuminate one or more of the light sources during a first lamp illumination phase, and

load image data to the array of pixels during a first data loading phase, wherein;

the first update phase overlaps at least partially in time with the first lamp illumination phase, and

the image data is loaded during at least a portion of the first sub-phase of the first update phase.

2. The display of claim 1, wherein the first update phase corresponds to a first transition of the pixels to a reset state.

3. The display of claim 2, wherein the first transition of the pixels to the reset state includes positioning the light blocking elements of the pixels to a reset position.

4. The display of claim 2, wherein the controller circuit is further capable of providing data to actuate the light blocking elements during a second update phase, the second update phase occurring after the first update phase, the second update phase corresponding to transitioning one or more of the pixels to a second state from the reset state.

5. The display of claim 4, wherein the controller circuit is further capable of providing data to illuminate one or more of the light sources during a second lamp illumination phase, wherein the second update phase overlaps at least partially in time with the second lamp illumination phase.

6. The display of claim 5, wherein the controller circuit is further capable of providing data to load image data to the array of pixels during a second data loading phase, the second data loading phase overlapping at least partially in time with the second lamp illumination phase.

7. The display of claim 6, wherein the controller circuit is further capable of providing data to actuate the light blocking elements during a third update phase to transition the light blocking elements of the pixels to the reset state, the third update phase overlapping at least partially in time with one or both of the second data loading phase and the second lamp illumination phase.

8. A method of operating a display, the method comprising:

loading, by a controller, image data to an array of pixels during a first data loading phase, each of the pixels having a corresponding light blocking element;

actuating, by the controller, the light blocking elements of the pixels during a first update phase comprising a first sub-phase corresponding to a first transition of a light blocking element and a second sub-phase corresponding to a second transition of the light blocking element; and

illuminating, by the controller, one or more light sources of the display to direct light towards the pixels to form an image on the display during a first lamp illumination phase, wherein;

the first update phase overlaps at least partially in time with the first lamp illumination phase, and

the image data is loaded during at least a portion of the first sub-phase of the first update phase.

9. The method of claim 8, wherein the first update phase corresponds to a first transition of the pixels to a reset state.

10. The method of claim 9, wherein the first transition of the pixels to the reset state includes positioning the light blocking elements of the pixels to a reset position.

11. The method of claim 8, the method further comprising:

actuating the light blocking elements during a second update phase, the second update phase occurring after the first update phase, the second update phase corresponding to transitioning one or more of the pixels to a second state from the reset state.

12. The method of claim 11, the method further comprising:

illuminating one or more of the light sources during a second lamp illumination phase, wherein the second update phase overlaps at least partially in time with the second lamp illumination phase.

13. The method of claim 12, the method further comprising:

loading image data to the array of pixels during a second data loading phase, the second data loading phase overlapping at least partially in time with the second lamp illumination phase.

14. The method of claim 13, the method further comprising:

actuating the light blocking elements during a third update phase to transition the light blocking elements of the pixels to the reset state, the third update phase overlapping at least partially in time with one or both of the second data loading phase and the second lamp illumination phase.

15. A circuit capable of actuating pixels of a display during a first update operation comprising a first sub-phase corresponding to a first transition of a light blocking element associated with a pixel and comprising a second sub-phase corresponding to a second transition of the light blocking element, illuminating one or more light sources of the display during a first lamp illumination operation, and loading image data to the pixels of the display during a first data loading operation, wherein the first update operation overlaps at least partially in time with the first lamp illumination operation, and the image data is loaded during at least a portion of the first sub-phase of the first update operation.

16. The circuit of claim 15, wherein the first update operation corresponds to a first transition of the pixels to a reset state.

17. The circuit of claim 16, wherein the circuit is further capable of actuating the pixels during a second update operation, the second update operation occurring after the first update operation, the second update operation corresponding to transitioning one or more of the pixels to a second state from the reset state.

18. The circuit of claim 17, wherein the circuit is further capable of illuminating one or more of the light sources during a second lamp illumination operation, wherein the second update operation overlaps at least partially in time with the second lamp illumination operation.

19. The circuit of claim 18, wherein the circuit is further capable of loading image data to the pixels during a second data loading operation, the second data loading operation overlapping at least partially in time with the second lamp illumination operation.

20. The circuit of claim 19, wherein the circuit is further capable of actuating the pixels during a third update operation to transition the pixels to the reset state, the third update operation overlapping at least partially in time with one or both of the second data loading operation and the second lamp illumination operation.