Color filter and liquid crystal display comprising the same

Abstract

Disclosed here is the technical field of liquid crystal display, and in particular to a color filter and a liquid crystal display with the color filter. The color filter has a plurality of diaphragm groups, each diaphragm group consists of at least one red diaphragm, at least one green diaphragm and at least one blue diaphragm, wherein the diaphragms of at least one of said diaphragm groups are configured in such a sequence that color cast caused by a RC delay of a pixel signal can be compensated.

Claims

1. A color filter, comprising a plurality of diaphragm groups, each diaphragm group consisting of at least one red diaphragm, at least one green diaphragm and at least one blue diaphragm, wherein the diaphragms of at least one of said diaphragm groups are configured in such a sequence that color cast caused by an RC delay of a pixel signal can be compensated, and wherein the diaphragms in each odd-numbered diaphragm group are periodically arranged according to a sequence of red diaphragm, green diaphragm, and blue diaphragm from top to bottom of a vertical direction, and the diaphragms in each even-numbered diaphragm group are periodically arranged according to a sequence of blue diaphragm, green diaphragm, and red diaphragm from top to bottom in the vertical direction.

2. A liquid crystal display, which includes a color filter comprising a plurality of diaphragm groups, each diaphragm group consisting of at least one red diaphragm, at least one green diaphragm and at least one blue diaphragm, wherein the diaphragms of at least one of said diaphragm groups are configured in such a sequence that color cast caused by an RC delay of a pixel signal can be compensated, and wherein the diaphragms in each odd-numbered diaphragm group are periodically arranged according to a sequence of red diaphragm, green diaphragm, and blue diaphragm from top to bottom in a vertical direction, and the diaphragms in each even-numbered diaphragm group are periodically arranged according to a sequence of blue diaphragm, green diaphragm, and red diaphragm from top to bottom in the vertical direction.

3. The liquid crystal display according to claim 2, wherein a voltage corresponding to a waveform written in the pixel signal is higher than that corresponding to a previous waveform.

4. The liquid crystal display according to claim 2, wherein the RC delay is caused by a switchover between a high potential and a low potential.

5. The liquid crystal display according to claim 2, wherein the liquid crystal display is a thin film transistor liquid crystal display.

6. The display according to claim 2, wherein the diaphragms of the diaphragm groups are arranged in terms of color in a sequence so that red color in display images deepens in even-numbered diaphragm groups.

7. The display according to claim 2, wherein the diaphragms of the diaphragm groups are arranged in terms of color in a sequence so that red color in display images deepen in odd-numbered diaphragm groups.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) In the following the present disclosure will be illustrated in detail based on non-limiting examples with reference to the accompanying drawings. In the drawings:

(2) FIG. 1 shows the color sequence of diaphragms in several diaphragm groups of a color filter in the prior art, with the arrow therein representing a direction along which a data waveform is applied,

(3) FIG. 2 shows signals applied on diaphragms of the color filter,

(4) FIG. 3 shows an example of the color sequence of a diaphragm group of a color filter according to the present disclosure, and

(5) FIG. 4 shows another example of the color sequence of a diaphragm group of a color filter according to the present disclosure.

(6) In the drawings, same components are indicated by the same reference sign. The drawings are not drawn to actual scale.

DETAILED DESCRIPTION OF THE EMBODIMENTS

(7) The present disclosure will be explained in detail with reference to the accompanying drawings.

(8) In the present disclosure, a color filter is proposed. Referring to FIG. 3, the color filter comprises a plurality of diaphragm groups, each consisting of at least one red diaphragm, at least one green diaphragm, and at least one blue diaphragm. The diaphragms of at least one of said diaphragm groups are configured in such a sequence that the color cast caused by an RC delay of a pixel signal can be compensated.

(9) FIG. 3 shows an example of a color sequence of the color filter according to the present disclosure. Referring to FIG. 3, the diaphragms in odd-numbered diaphragm groups are arranged in a cycle according to a sequence of red diaphragm, green diaphragm, and blue diaphragm, and the diaphragms in even-numbered diaphragm groups are arranged in a cycle according to a sequence of blue diaphragm, green diaphragm, and red diaphragm.

(10) As illustrated in FIG. 2, when signals sent to pixels through data lines are switched between a high potential and a low potential, a waveform for the input pixel data is better than the previous one due to RC delay. Therefore, the voltage charged into pixels later is higher, and thus the LCD will be brighter, with one of the colors being highlighted. As the difference of data waveforms as illustrated in FIG. 2 occurs, red color in the display image will be deepened in odd-numbered diaphragm groups, while green color in the display image will be deepened in even-numbered diaphragm groups. In this way, there is no color cast in the whole image. Therefore, the problem of the color cast can be thoroughly solved.

(11) FIG. 4 shows another embodiment of the color sequence of the color filter according to the present disclosure. Referring to FIG. 4, the diaphragms of each of the diaphragm groups are arranged in a cycle according to a sequence of red diaphragm, green diaphragm, blue diaphragm, blue diaphragm, green diaphragm and red diaphragm. Based on such an arrangement, the color cast caused by the RC delay can be precisely compensated. The difference of the waveforms of the pixel signal data caused by the RC delay when the switchover between the high potential and the low potential occurs will not cause one of the colors to be highlighted all the time.

(12) According to the present disclosure, a LCD is further proposed, comprising the color filter according to the present disclosure.

(13) Referring to FIG. 2, due to the RC delay, in the LCD, the voltage corresponding to a waveform written in the signals, which are sent to the pixels through the data lines, is higher than the previous one, because a later waveform is better than a previous one. The RC delay is caused by the switchover between a high potential and a low potential. The LCDE can be a TFT-LCD, for example.

(14) FIG. 2 shows signals applied on the color sequence of the color filter. The diaphragms of each of the diaphragm groups are arranged in terms of color in such a sequence that the red color of the display images deepens in odd-numbered diaphragm groups. Referring to FIG. 2, the left waveform diagram shows a principle for the red color of the display image to be deepened. This is because the signals sent to pixels through the data lines suffer from the RC delay when the switchover between a high potential and a low potential occurs, causing a former waveform of the data signal is less perfect than a latter one thereof, so that the voltage corresponding to the latter waveform is higher, and thus the voltage applied to the latter diaphragm is higher. As a result, the color of the latter diaphragm appears deeper. Therefore, the display image appears in a shade of red color when the voltage is applied to the red diaphragm after the green diaphragm.

(15) Meanwhile, the diaphragms in each of the diaphragm groups are arranged in terms of color in such a sequence that the green color of the display images deepens in even-numbered diaphragm groups. Referring to FIG. 2, the right waveform diagram shows a principle for the green color of the display image to be deepened. This is because the signals sent to pixels through the data lines suffer from the RC delay when the switchover between a high potential and a low potential occurs, causing a former waveform of the data signal is less perfect than a latter one thereof, so that the voltage corresponding to the latter waveform is higher, and thus the voltage applied to the latter diaphragm is higher. As a result, the color of the latter diaphragm appears deeper. Therefore, the display image appears in a shade of green color when the voltage is applied to the green diaphragm after the red diaphragm.

(16) In such a way, the defect that a display image as a whole appears in a shade of a certain color in the prior art can be solved

(17) Although the present disclosure has been described with reference to preferred embodiments, various modifications and variants to the present disclosure may be made by anyone skilled in the art, without departing from the scope and spirit of the present disclosure. In particular, as long as there is no structural conflict, various embodiments as well as the respective technical features mentioned herein may be combined with one another in any manner. The present disclosure is not limited to the specific examples disclosed herein, but rather includes all the technical solutions falling within the scope of the claims.