Touch screen 2D/3D display system and method
First Claim
1. A display device, comprising:
- a liquid crystal display (LCD) panel for displaying images, which comprises a first polarizer, a first glass substrate coupled to the first polarizer, a first electrode layer formed on the first glass substrate, a first alignment layer formed on the first electrode layer, a second polarizer, a second glass substrate coupled to the second polarizer, a second electrode layer formed on the second glass substrate, a second alignment layer formed on the second electrode layer, and a liquid crystal layer formed between the first alignment layer and the second alignment layer, wherein the second electrode layer is coupled to the first electrode layer;
a first driving circuit configured to provide a first driving signal at a first frequency;
a second driving circuit configured to provide a second driving signal at a second frequency, different from the first frequency;
a coupling unit coupled to the first driving circuit and the second driving circuit to receive the first driving signal and the second driving signal at the same time and configured to couple the first driving signal and the second driving signal in a frequency domain, and to provide the coupled signal of the first driving signal and second driving signal to both of the first electrode layer and the second electrode layer such that the first driving signal drives the LCD panel for displaying the images, and the second driving signal drives the LCD panel for being touch-sensitive; and
a signal separation unit, separate and different from the first driving circuit and the second driving circuit, coupled to at least one of the first electrode layer and the second electrode layer to receive a feedback signal and to separate from the feedback signal a capacitance change signal indicating a capacitance change corresponding to a touch on the LCD panel,the first driving circuit is further configured to separately provide a third driving signal to both of the first electrode layer and the second electrode layer of the LCD panel without going through the coupling unit, in addition to and together with the coupled first and second driving signals, wherein the third driving signal and the first driving signal effect 3D image display.
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Abstract
A display device is provided. The display device includes a liquid crystal display (LCD) panel for displaying images, a first electrode layer, and a second electrode layer coupled to the first electrode layer. The display device also includes a first driving circuit configured to provide a first driving signal and a second driving circuit configured to provide a second driving signal. Further, the display device includes a coupling unit coupled to the first driving circuit and the second driving circuit and configured to couple the first driving signal and the second driving signal, and to provide the coupled signal of the first driving signal and second driving signal to both of the first electrode layer and the second electrode layer such that the first driving signal drives the LCD panel for displaying the images, and the second driving signal drives the LCD panel for being touch-sensitive. The display device also includes a signal separation unit coupled to at least one of the first electrode layer and the second electrode layer to receive a feedback signal indicating a capacitance change corresponding to a touch on the LCD panel.
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Citations
20 Claims
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1. A display device, comprising:
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a liquid crystal display (LCD) panel for displaying images, which comprises a first polarizer, a first glass substrate coupled to the first polarizer, a first electrode layer formed on the first glass substrate, a first alignment layer formed on the first electrode layer, a second polarizer, a second glass substrate coupled to the second polarizer, a second electrode layer formed on the second glass substrate, a second alignment layer formed on the second electrode layer, and a liquid crystal layer formed between the first alignment layer and the second alignment layer, wherein the second electrode layer is coupled to the first electrode layer; a first driving circuit configured to provide a first driving signal at a first frequency; a second driving circuit configured to provide a second driving signal at a second frequency, different from the first frequency; a coupling unit coupled to the first driving circuit and the second driving circuit to receive the first driving signal and the second driving signal at the same time and configured to couple the first driving signal and the second driving signal in a frequency domain, and to provide the coupled signal of the first driving signal and second driving signal to both of the first electrode layer and the second electrode layer such that the first driving signal drives the LCD panel for displaying the images, and the second driving signal drives the LCD panel for being touch-sensitive; and a signal separation unit, separate and different from the first driving circuit and the second driving circuit, coupled to at least one of the first electrode layer and the second electrode layer to receive a feedback signal and to separate from the feedback signal a capacitance change signal indicating a capacitance change corresponding to a touch on the LCD panel, the first driving circuit is further configured to separately provide a third driving signal to both of the first electrode layer and the second electrode layer of the LCD panel without going through the coupling unit, in addition to and together with the coupled first and second driving signals, wherein the third driving signal and the first driving signal effect 3D image display. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 19)
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9. A method for a display device including a liquid crystal display (LCD) panel for displaying images, which comprises a first electrode layer and a second electrode layer coupled to the first electrode layer, the method comprising:
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generating a first driving signal at a first frequency and a second driving signal at a second frequency different from the first frequency; receiving the first driving signal and the second driving signal at the same time; coupling the first driving signal and the second driving signal in a frequency domain by a coupling unit; providing the coupled signal of the first driving signal and second driving signal to both of the first electrode layer and the second electrode layer such that the first driving signal drives the LCD panel for displaying the images, and the second driving signal drives the LCD panel for being touch-sensitive; separately providing a third driving signal to both of the first electrode layer and the second electrode layer of the LCD panel without going through the coupling unit, in addition to and together with the coupled first and second driving signals, wherein the third driving signal and the first driving signal effect 3D image display; receiving from at least one of the first electrode layer and the second electrode layer a feedback signal and separating from the feedback signal a capacitance change signal indicating a capacitance change corresponding to a touch on the LCD panel; and determining a touch position of the touch on the LCD panel based on the feedback signal. - View Dependent Claims (10, 11, 20)
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12. A display device, comprising:
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a liquid crystal display (LCD) panel for displaying images; an optical device, different from the LCD panel and stacking on top of the LCD panel, including a first electrode layer, a first alignment layer formed on the first electrode layer, a second electrode layer, a second alignment layer formed on the second electrode layer, a liquid crystal layer coupled between the first alignment layer and the second alignment layer on the first electrode layer and the second electrode layer, respectively, and a lens unit, wherein the lens unit includes a first lens array, a second lens array coupled with the first lens array, and a glass substrate coupled to the second lens array, and the first lens array is optically isotropic and the second lens array is optically anisotropic such that the coupled first lens array and second lens array change direction of light from the LCD panel in a first polarization direction and maintain direction of light from the LCD panel in a second polarization direction; a first driving circuit configured to provide a first driving signal at a first frequency; a second driving circuit configured to provide a second driving signal at a second frequency, different from the first frequency; a coupling unit coupled to the first driving circuit and the second driving circuit to receive the first driving signal and the second driving signal at the same time and configured to couple the first driving signal and the second driving signal in a frequency domain and to provide the coupled signal of the first driving signal and second driving signal to both of the first electrode layer and the second electrode layer such that the first driving signal drives the optical device for processing lights from the LCD panel, and the second driving signal drives the optical device for being touch-sensitive; and a signal separation unit, separate and different from the first driving circuit and the second driving circuit, coupled to at least one of the first electrode layer and the second electrode layer to receive a feedback signal and to separate from the feedback signal a capacitance change signal indicating a capacitance change corresponding to a touch on the optical device, wherein the first driving circuit is further configured to separately provide a third driving signal to both of the first electrode layer and the second electrode layer of the LCD panel without going through the coupling unit, in addition to and together with the coupled first and second driving signals, wherein the third driving signal and the first driving signal effect 3D image display. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification