Granted Patent B2

US 10,321,121 · App. 14/893,074 · Granted Jun 11, 2019

Abstract

Claims (59)

1. A stereoscopic image display apparatus comprising:

a one-side electrode comprising a plurality of extension electrodes spaced apart from each other;

an opposite-side electrode comprising a plurality of extension electrodes spaced apart from each other;

a liquid crystal unit interposed between the one-side electrode and the opposite-side electrode for selectively forming any one of a plurality of barrier patterns based on an electric field or potential difference selectively formed therebetween,

wherein one of the extension electrodes of the one-side electrode overlaps at least two of the extension electrodes of the opposite-side electrode, and

a first terminal for applying electrical pulses to the one-side electrode and a second terminal for applying electrical pulses to the opposite-side electrode,

wherein a state in which the barrier patterns formed in the liquid crystal unit are arranged is changed based on the pulses being applied to the one-side electrode and the opposite-side electrode.

2. The stereoscopic image display apparatus according to claim 1 , wherein the one-side electrode comprises first one-side extension electrodes and second one-side extension electrodes alternately arranged,

wherein the opposite-side electrode comprises first opposite-side extension electrodes and second opposite-side extension electrodes alternately arranged,

wherein one of the first one-side extension electrodes overlaps a first pair formed by one of the first opposite-side extension electrodes and one of the second opposite-side extension electrodes, and

wherein one of the second one-side extension electrodes overlaps a second pair formed by one of the first opposite-side extension electrodes and one of the second opposite-side extension electrodes.

3. The stereoscopic image display apparatus according to claim 2 , wherein the stereoscopic image display apparatus is configured to change electric potential applied to the first opposite-side extension electrodes and the second opposite-side extension electrodes by reflecting a change in position of eyes or a head of a user captured using a predetermined detection means in a state in which different electric potentials are applied to the first one-side extension electrodes and the second one-side extension electrodes.

4. The stereoscopic image display apparatus according to claim 1 , wherein the one-side extension electrodes comprise a first one-side extension electrode and a second one-side extension electrode, and

wherein a set of opposite-side extension electrodes corresponding to one of the extension electrodes of the one-side electrode comprises a first opposite-side extension electrode and a second opposite-side extension electrode.

5. The stereoscopic image display apparatus according to claim 4 , wherein the barrier patterns are arranged such that the barrier patterns are changed based on a change in position of a user's gaze, and a state of arrangement of the barrier patterns is changed at a plurality of steps in response to the position of the user's gaze, the steps comprising:

a first step, at which a potential difference is generated between the first one-side extension electrode and the first and second opposite-side extension electrodes to form barrier patterns;

a second step, at which a potential difference is generated between the first one-side extension electrode and the second opposite-side extension electrode and between the second one-side extension electrode and the first opposite-side extension electrode to form barrier patterns;

a third step, at which a potential difference is generated between the second one-side extension electrode and the first and second opposite-side extension electrodes to form barrier patterns; and

a fourth step, at which a potential difference is generated between the first one-side extension electrode and the first opposite-side extension electrode and between the second one-side extension electrode and the second opposite-side extension electrode to form barrier patterns.

6. The stereoscopic image display apparatus according to claim 5 , wherein the first to fourth steps are performed in reverse.

7. The stereoscopic image display apparatus according to claim 1 , wherein

the one-side extension electrodes comprise a first one-side extension electrode and a second one-side extension electrode, and

a set of opposite-side extension electrodes corresponding to one of the extension electrodes of the one-side electrode comprises a first opposite-side extension electrode, a second opposite-side extension electrode, and a third opposite-side extension electrode.

8. The stereoscopic image display apparatus according to claim 7 , wherein the barrier patterns are arranged such that the barrier patterns are changed based on a change in position of a user's gaze, and a state of arrangement of the barrier patterns is changed at a plurality of steps in response to the position of the user's gaze, the steps comprising:

a first step, at which a potential difference is generated between the first one-side extension electrode and the first, second, and third opposite-side extension electrodes to form barrier patterns;

a second step, at which a potential difference is generated between the first one-side extension electrode and the second and third opposite-side extension electrode and between the second one-side extension electrode and the first opposite-side extension electrode to form barrier patterns;

a third step, at which a potential difference is generated between the one one-side extension electrode and the third opposite-side extension electrode and between the second one-side extension electrode and the first and second opposite-side extension electrodes to form barrier patterns;

a fourth step, at which a potential difference is generated between the second one-side extension electrode and the first, second, and third opposite-side extension electrodes to form barrier patterns;

a fifth step, at which a potential difference is generated between the first one-side extension electrode and the first opposite-side extension electrode and between the second one-side extension electrode and the first and second opposite-side extension electrodes to form barrier patterns; and

a sixth step, at which a potential difference is generated between the first one-side extension electrode and the first and second opposite-side extension electrodes and between the second one-side extension electrode and the third opposite-side extension electrode to form barrier patterns.

9. The stereoscopic image display apparatus according to claim 8 , wherein the first to sixth steps are performed in reverse.

10. The stereoscopic image display apparatus according to claim 1 , wherein a number of barrier pattern changing steps is equivalent to twice a number of opposite-side extension electrodes corresponding to one of the extension electrodes of the one-side electrode.

11. The stereoscopic image display apparatus according to claim 1 , wherein the extension electrodes of the one-side electrode and the opposite-side electrode are inclined by a non-zero predetermined angle with respect to a vertical direction.

12. The stereoscopic image display apparatus according to claim 1 , wherein a first barrier pattern of the plurality of barrier patterns is formed while the first terminal applies a first series of pulses to the one-side electrode and the second terminal applies a second series of pulses to the opposite-side electrode, and a second barrier pattern of the plurality of barrier patterns is formed while the first terminal applies a third series of pulses, different from the first series of pulses, to the one-side electrode and the second terminal applies the second series of pulses to the opposite-side electrode.

13. A stereoscopic image display apparatus comprising:

a one-side electrode comprising a plurality of extension electrodes spaced apart from each other;

an opposite-side electrode comprising a plurality of extension electrodes spaced apart from each other;

a liquid crystal unit interposed between the one-side electrode and the opposite-side electrode for selectively forming any one of a plurality of barrier patterns based on an electric field or potential difference selectively formed therebetween,

wherein one of the extension electrodes of the one-side electrode overlaps at least two of the extension electrodes of the opposite-side electrode;

a first pair of terminals electrically connected to the one-side electrode; and

a second pair of terminals electrically connected to the opposite-side electrode,

wherein the first pair of terminals are adjacent to each other, and interpose the second pair of terminals,

wherein the first pair of terminals apply electrical pulses to the one-side electrode and the second pair of terminals apply electrical pulses to the opposite-side electrode, and

wherein the electric field or potential difference is selectively formed between the one-side electrode and the opposite-side electrode by the electrical pulses applied to the one-side electrode and the electrical pulses applied to the opposite-side electrode.

14. The stereoscopic image display apparatus according to claim 13 , wherein a state in which the barrier patterns formed in the liquid crystal unit are arranged is changed based on pulses applied to the one-side electrode and the opposite-side electrode.

15. The stereoscopic image display apparatus according to claim 13 , wherein a first barrier pattern of the plurality of barrier patterns is formed while the first pair of terminals applies a first pair of pulse signals to the one-side electrode and the second pair of terminals applies a second pair of pulse signals to the opposite-side electrode.

16. The stereoscopic image display apparatus according to claim 15 , wherein a second barrier pattern of the plurality of barrier patterns is formed while the first pair of terminals applies a third pair of pulse signals, different from the first pair of pulse signals, to the one-side electrode and the second terminal applies the second series of pulses to the opposite-side electrode.

17. A method of controlling a stereoscopic image display apparatus, the method comprising:

driving a liquid crystal unit interposed between a one-side electrode and an opposite-side electrode to selectively form any one of a plurality of different barrier patterns in response to a corresponding electric field or potential difference applied thereto by the one-side electrode and the opposite-side electrode, the driving comprising:

applying a one-side driving signal to the one-side electrode, the one-side driving signal being the same for each of the plurality of different barrier patterns; and

applying a selected one of a plurality of different opposite-side driving signals to the opposite-side electrode, each of the plurality of different opposite-side driving signals corresponding to a respective one of the plurality of different barrier patterns;

wherein the electric field or potential difference is formed between at least one extension electrode of the one-side electrode and at least two extension electrodes of the opposite-side electrode in response to the applying of the one-side driving signal and the selected one of the plurality of different opposite-side driving signals.

18. The method of claim 17 , wherein the applying of the one-side driving signal to the one-side electrode includes applying a first series of one-side pulses to a first one-side terminal of the one-side electrode, and wherein the applying of the selected one of the plurality of different opposite-side driving signals to the opposite-side electrode includes applying a first series of opposite-side pulses to a first opposite-side terminal of the opposite-side electrode.

19. The method of claim 18 , wherein the applying of the one-side driving signal to the one-side electrode includes applying a second series of one-side pulses to a second one-side terminal of the one-side electrode, and wherein the applying of the selected one of the plurality of different opposite-side driving signals to the opposite-side electrode includes applying a second series of opposite-side pulses to a second opposite-side terminal of the opposite-side electrode.

20. The method of claim 17 , further comprising switching from a landscape display mode to a portrait display mode, the switching comprising:

stopping the applying of the one-side driving signal to the one-side electrode;

stopping the applying of the selected one of the plurality of different opposite-side driving signals to the opposite-side electrode;

applying a portrait-mode one-side driving signal to a portrait-mode one-side electrode; and

applying a selected one of a plurality of different portrait-mode opposite-side driving signals to a portrait-mode opposite-side electrode.

Assignments (8)