Patent Application
20170243549
This non-provisional application claims priority under 35 U.S.C. §119(a) on Patent Application No. 105104980 filed in Taiwan, R.O.C. on Feb. 19, 2016, the entire contents of which are hereby incorporated by reference.
Some references, if any, which may include patents, patent applications and various publications, may be cited and discussed in the description of this invention. The citation and/or discussion of such references, if any, is provided merely to clarify the description of the present invention and is not an admission that any such reference is “prior art” to the invention described herein. All references listed, cited and/or discussed in this specification are incorporated herein by reference in their entireties and to the same extent as if each reference was individually incorporated by reference.
The present disclosure relates to a display method and a display device, and in particular, to a display method and a display device that reduces a color breakup phenomenon.
As electronic products become popular, a large quantity of liquid crystal displays are applied to 3C products such as televisions, mobile phones, notebook computers, and tablet computers. Generally, a conventional liquid crystal display needs to use color filters and a large quantity of transistors to display images having different colors. Therefore, to save space usage inside a display and a cost, at present a field sequential color (FSC) display is developed in the industry. In the FSC display, different light-emitting diodes can respectively emit red (R), green (G), and blue (B) light at a particular time, and the three major primary colors are mixed.
A switching speed of the FSC display exceeds a frequency (that is, 60 Hz) perceptible to human eyes, and therefore, human brains superimpose all pictures because of persistence of vision; therefore, a user perceives a full-color picture. In an ideal condition, pixels corresponding to light of three colors in the FSC display are projected onto a same position on a retina, and therefore color information of each pixel can be completely reproduced in vision.
However, if the pixels corresponding to light of three colors in the FSC display are projected onto different positions on the retina, the user observes an image in which color fields are separate and misaligned, which is a color breakup (CBU) phenomenon. A color breakup phenomenon is especially severe at an edge of an object in an image.
An aspect of the present disclosure provides a display method adapted to a display device including a plurality of pixel. The display method includes: displaying a first color field, a second color field, and a third color field respectively in a first time period, a second time period, and a third time period such that each of the pixels is configured to display a background color, where for each of the pixels, a first peripheral pixel is determined to be at a distance from the pixel along a first direction on the display device, and a second peripheral pixel is determined to be at the distance from the pixel along a second direction opposite the first direction; determining, from the pixels, a plurality of color breakup pixels according to the second color field of each of the pixels, the first color field of the first peripheral pixel of each of the pixels, the third color field of the second peripheral pixel of each of the pixels, and the background color of each of the pixels; calculating, for each of the color breakup pixels, a color breakup color of the color breakup pixel according to the second color field of the color breakup pixel, the first color field of the first peripheral pixel of the color breakup pixel, and the third color field of the second peripheral pixel of the color breakup pixel; calculating a compensation color of each of the color breakup pixels according to the background color and the color breakup color of the color breakup pixel; and displaying, for each of the pixels, a fourth color field in a fourth time period, where each of the color breakup pixels is configured to display the compensation color in the fourth color field.
In certain embodiments, the calculating a compensation color of each of the color breakup pixels further includes: converting the background color and the color breakup color of each of the color breakup pixels to numerical values in a chromaticity coordinate by using a conversion matrix; computing a difference between the numerical values of the background color and the numerical values of the color breakup color of each of the color breakup pixels in the chromaticity coordinate; and converting the difference between the numerical values of the background color and the numerical values of the color breakup color of each of the color breakup pixels to the compensation color by using an inverse matrix of the conversion matrix, to obtain the compensation color of each of the color breakup pixels.
In certain embodiments, the first direction is a horizontal direction on the display device, and the distance is at least one pixel width.
In certain embodiments, at least one of the first color field, the second color field, and the third color field is a single color field.
In certain embodiments, the first color field is a red color field, the second color field is green color field, and the third color field is a blue color field.
In certain embodiments, at least one of the first color field, the second color field, and the third color field is a mixed color field, and the pixels in the mixed color field are configured to display light of at least two single colors.
In certain embodiments, the display method further includes: calculating the compensation color of each of the color breakup pixels according to the background colors of the pixels adjacent to the color breakup pixel and the color breakup color of the color breakup pixel.
In certain embodiments, the display method further includes: detecting an eyeball moving speed of an observer to generate speed information; and calculating, as the distance, a distance of translation of the first color field and the third color field according to the speed information.
Another aspect of the present disclosure provides a display device. The display device includes a display panel and a controller. The display panel includes a plurality of pixels. The display panel is configured to display a first color field, a second color field, and a third color field respectively in a first time period, a second time period, and a third time period such that each of the pixels is configured to display a background color, where a first peripheral pixel is determined to be at a distance from the pixel along a first direction on the display device, and a second peripheral pixel is determined to be at the distance from the pixel along a second direction opposite the first direction. The controller includes an image analysis unit and a computation unit. The image analysis unit is configured to determine, from the pixels, a plurality of color breakup pixels according to the second color field of each of the pixels, the first color field of the first peripheral pixel of each of the pixels, the third color field of the second peripheral pixel of each of the pixels, and the background color of each of the pixels. The computation unit is configured to calculate, for each of the color breakup pixels, a color breakup color of the color breakup pixel according to the second color field of the color breakup pixel, the first color field of the first peripheral pixel of the color breakup pixel, and the third color field of the second peripheral pixel of the color breakup pixel, and calculate a compensation color of each of the color breakup pixels according to the background color and the color breakup color of the color breakup pixel, where the display panel is further configured to display a fourth color field in a fourth time period, and each of the color breakup pixels is configured to display the compensation color in the fourth color field.
In conclusion, a color breakup phenomenon is effectively reduced by displaying a compensation color of each color breakup pixel. In addition, in some embodiments, spatial color mixing is further achieved by using a mixed color field. Alternatively, in some embodiments, when a color difference between a background color and a color breakup color is relatively large, a compensation color may be calculated by using a background color of an adjacent pixel. Further alternatively, in some embodiments, an eyeball moving speed of an observer may be further considered to determine a pixel in which a color breakup phenomenon may occur.
To make the foregoing features and advantages of the present invention more comprehensible, embodiments are particularly listed below with reference to the accompanying drawings, which are described in detail below.
The accompanying drawings illustrate one or more embodiments of the disclosure and together with the written description, serve to explain the principles of the disclosure. Wherever possible, the same reference numbers are used throughout the drawings to refer to the same or like elements of an embodiment.
The following discloses and provides many different embodiments or examples used to implement different features of the present invention. Elements and configurations in special examples are used in the following discussion to simplify the present disclosure. Any discussed example is only used for illustrative purposes, and does not limit the scope and meaning of the present invention or examples of the present invention in any manner. In addition, numerical symbols and/or letters may be repeatedly used in different examples of the present disclosure, and all these repetitions are for simplification and description, and do not specify relationships between different embodiments and/or configurations in the following discussion.
The terms used in the entire specification and the claims, unless specifically indicated, usually have common meanings of the terms used in the art and in the disclosed content and special content. Some terms used to describe the present disclosure are discussed below or somewhere else in this specification, so as to provide additional guidance in the description of the present disclosure to a person skilled in the art. For convenience, certain terms may be highlighted, for example using italics and/or quotation marks. The use of highlighting has no influence on the scope and meaning of a term; the scope and meaning of a term is the same, in the same context, whether or not it is highlighted. It will be appreciated that same thing can be said in more than one way. Consequently, alternative language and synonyms may be used for any one or more of the terms discussed herein, nor is any special significance to be placed upon whether or not a term is elaborated or discussed herein. Synonyms for certain terms are provided. A recital of one or more synonyms does not exclude the use of other synonyms. The use of examples anywhere in this specification including examples of any terms discussed herein is illustrative only, and in no way limits the scope and meaning of the invention or of any exemplified term. Likewise, the invention is not limited to various embodiments given in this specification.
It will be understood that when an element is referred to as being “on” another element, it can be directly on the other element or intervening elements may be present therebetween. In contrast, when an element is referred to as being “directly on” another element, there are no intervening elements present. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items.
It will be understood that, although the terms first, second, third etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the disclosure.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” and/or “comprising”, or “includes” and/or “including” or “has” and/or “having” when used in this specification, specify the presence of stated features, regions, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, regions, integers, steps, operations, elements, components, and/or groups thereof.
Furthermore, relative terms, such as “lower” or “bottom”, “upper” or “top”, and “left” and “right”, may be used herein to describe one element's relationship to another element as illustrated in the Figures. It will be understood that relative terms are intended to encompass different orientations of the device in addition to the orientation depicted in the Figures. For example, if the device in one of the figures is turned over, elements described as being on the “lower” side of other elements would then be oriented on “upper” sides of the other elements. The exemplary term “lower”, can therefore, encompasses both an orientation of “lower” and “upper”, depending of the particular orientation of the figure. Similarly, if the device in one of the figures is turned over, elements described as “below” or “beneath” other elements would then be oriented “above” the other elements. The exemplary terms “below” or “beneath” can, therefore, encompass both an orientation of above and below.
As used herein, “around”, “about” or “approximately” shall generally mean within 20 percent, preferably within 10 percent, and more preferably within 5 percent of a given value or range. Numerical quantities given herein are approximate, meaning that the term “around”, “about” or “approximately” can be inferred if not expressly stated.
As used herein, the term “unit” may refer to, be part of, or include an Application Specific Integrated Circuit (ASIC); an electronic circuit; a combinational logic circuit; a field programmable gate array (FPGA); a processor (shared, dedicated, or group); a controller (shared, dedicated, or group) that executes computer executable code; other suitable hardware components that provide the described functionality; or a combination of some or all of the above, such as in a system-on-chip. The term “unit” may include memory (shared, dedicated, or group) that stores code executed by the processor.
“Coupling” or “connecting” used herein may both refer to that two or more elements are in direct physical or electrical contact, or are in indirect physical or electrical contact, while “coupling” or “connecting” may also refer to that two or more elements are interoperable or interacting. Herein, it may be understood that words such as first, second and third are used to describe various elements, components, areas, layers and/or blocks. However, these elements, components, areas, layers and/or blocks should not be limited by these terms. These words are only used for distinguishing between single elements, components, areas, layers and/or blocks. Therefore, a first element, component, area, layer and/or block hereinafter may also be referred to as a second element, component, area, layer and/or block without departing from the concept of the present invention. As used herein, the words “and/or” include one of the listed items or any combination of multiple of the listed items.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
As shown in
Furthermore,
It should be noted that, the first time period T1, the second time period T2, and the third time period T3 are only different time periods and do not have a fixed time sequence or order. In other words, a time order in which the first color field D1, the second color field D2, and the third color field D3 are displayed is not limited to an sequential order of the first color field D1, the second color field D2, and the third color field D3 as described above. For example, a sequential order of the second color field D2, the first color field D1, and the third color field D3 may be used. Further alternatively, for example, a sequential order of the third color field D3, the second color field D2, and the first color field D1 may be used.
Referring back to
Further, in another alternative example, an upward direction along a vertical direction of the display device 200 may be used as the first direction Y1, and the pixel width L2 may be used as the distance X1. Therefore, for the pixel A10, the pixel A9 at the pixel width L2 from the pixel A10 in the upward direction of the display device 200 is determined to be the first peripheral pixel S1 of the pixel A10, and the pixel A11 at the pixel width L2 from the pixel A10 in the downward direction of the display device 200 is determined to be the second peripheral pixel S2 of the pixel A10. It should be noted that, in an actual application, the direction Y1 is not limited to being along the horizontal or vertical direction of the display device 200, and may be any direction, and the distance X1 is not limited to the pixel width L1 or the pixel width L2, and may be any distance.
Continue referring to
Furthermore,
Next, in Step S130, the computation unit 224 is configured to calculate a color breakup color of each of the color breakup pixels BU1 to BU4 according to the second color field D2 of each color breakup pixel BU1 to BU4, the first color field D1 of the first peripheral pixel S1 of each color breakup pixel BU1 to BU4, and the third color field D3 of the second peripheral pixel S2 of each color breakup pixel BU1 to BU4. In Step S140, the computation unit 224 calculates a compensation color C of each color breakup pixel BU1 to BU4 according to the background color E and the color breakup color F of each color breakup pixel BU1 to BU4.
Furthermore,
More specifically, Step S140 may further include Steps S141 to S143 (not shown in the drawings). In Step S141, the computation unit 224 converts the background color E and the color breakup color F of each color breakup pixel BU1 to BU4 to numerical values in a chromaticity coordinate XYZ by using a conversion matrix M1. In Step S142, the computation unit 224 computes a difference between the numerical values of the background color E and the numerical values of the color breakup color F of each color breakup pixel BU1 to BU4 in the chromaticity coordinate XYZ. In Step S143, the computation unit 224 converts the difference between the numerical values of the background color E and the numerical values of the color breakup color F of each color breakup pixel BU1 to BU4 to the compensation color C by using an inverse matrix M1′ of the conversion matrix M1, to obtain the compensation color C of each color breakup pixel BU1 to BU4. Generally, when the numerical values of the background color E and the color breakup color F are analyzed using three primary colors, grayscale values corresponding to different colors may be represented in a grayscale coordinate RGB. However, if further computation needs to be performed, the numerical values of the background color E and the color breakup color F need to be converted from the grayscale coordinate RGB into the chromaticity coordinate XYZ by using the conversion matrix M1. The conversion matrix M1 may be represented by Formula (1) as follows:
Therefore, in Step S142, the difference between the numerical values of the background color E and the numerical values of the color breakup color F of each color breakup pixel BU1 to BU4 may be computed in the chromaticity coordinate XYZ. The computation of the color breakup pixel BU1 may be represented by Formula (2) as follows:
X
E
−X
BU1
=X
C
Y
E
−Y
BU1
=Y
C
Z
E
−Z
BU1
=Z
C Formula (2)
where, XE, YE, and ZE are the numerical values of the background color E of the color breakup pixel BU1 in the chromaticity coordinate XYZ, XBU1, YBU1, and ZBU1 are the numerical values of the color breakup color F of the color breakup pixel BU1 in the chromaticity coordinate XYZ, and XC, YC, and ZC are the difference between the numerical values of the background color E and the numerical values of the color breakup color F in the chromaticity coordinate XYZ. Similarly, for each color breakup pixel BU2 to BU4, the difference between the numerical values of the background color E and the numerical values of the color breakup color F in the chromaticity XYZ coordinate XC, YC, and ZC may be respectively obtained through computation according to the color breakup formula. Next, in Step S143, for each color breakup pixel BU1 to BU4, the difference XC, YC, and ZC between the numerical values of the background color E and the numerical values of the color breakup color F of each color breakup pixel BU1 to BU4 is then converted to the compensation color C by using the inverse matrix M1′ of the conversion matrix M1, to obtain the compensation color C of each color breakup pixel BU1 to BU4. That is, the difference XC, YC, and ZC is converted from the XYZ coordinate back into the RGB coordinate by using the inverse matrix M1′, to obtain the compensation color C of each color breakup pixel BU1 to BU4.
Finally, in Step S150, the display panel 210 displays a fourth color field D4 in a fourth time period T4, where the fourth color field D4 is configured to display the compensation color C of each color breakup pixel BU1 to BU4. Referring to
It needs to be noted that, in this embodiment, pixels other than the color breakup pixels BU1 to BU4 may display white light in the fourth color field D4, as shown in
The example as described above includes sequential exemplary steps, but the steps are not necessarily executed in an order that the steps are displayed. Execution of the steps in a different order falls within a consideration scope of the present disclosure. In addition, within the spirit and scope of the embodiments of the present disclosure, steps may be added, replaced, changed in order and/or omitted according to circumstances.
In some embodiments, the display method 100 further includes Step S170 (not shown in the drawings): calculating the compensation color C of each color breakup pixel BU1 to BU4 according to the background color E of a pixel adjacent to each color breakup pixel BU1 to BU4 and the color breakup color F of each color breakup pixel BU1 to BU4. Furthermore,
In some embodiments, the display method 100 further includes Step S181 (not shown in the drawings): detecting an eyeball moving speed of an observer to generate speed information; and Step S182 (not shown in the drawings): calculating, as the distance X1, a distance of translation of the first color field D1 and the third color field D3 according to the speed information. Generally, a color breakup phenomenon is related to the eyeball moving speed of the observer, that is, because each observer has a different eyeball moving speed, a position of a color breakup pixel in which a color breakup phenomenon may occur is different. Therefore, the Step S182 in this embodiment may further consider the eyeball moving speed of the observer to determine a pixel in which a color breakup phenomenon may occur. For example, when the eyeball moving speed is faster, the distance X1 of the translation of the first color field D1 and the third color field D3 is greater.
In conclusion, a color breakup phenomenon is effectively reduced by displaying a compensation color of each color breakup pixel. In addition, in some embodiments, spatial color mixing is further achieved by using a mixed color field. Alternatively, in some embodiments, when a color difference between a background color and a color breakup color is relatively large, a compensation color may be calculated by using a background color of an adjacent pixel. Further alternatively, in some embodiments, an eyeball moving speed of an observer may be further considered to determine a pixel in which a color breakup phenomenon may occur.
The foregoing description of the exemplary embodiments of the invention has been presented only for the purposes of illustration and description and is not intended to be exhaustive or to limit the invention to the precise forms disclosed. Many modifications and variations are possible in light of the above teaching.
The embodiments are chosen and described in order to explain the principles of the invention and their practical application so as to activate others skilled in the art to utilize the invention and various embodiments and with various modifications as are suited to the particular use contemplated. Alternative embodiments will become apparent to those skilled in the art to which the present invention pertains without departing from its spirit and scope. Accordingly, the scope of the present invention is defined by the appended claims rather than the foregoing description and the exemplary embodiments described therein.
| Number | Date | Country | Kind |
|---|---|---|---|
| 105104980 | Feb 2016 | TW | national |
