Display circuit with increased transmittance and reduced coupling capacitance
A circuit and display pixel technology, applied in the direction of circuits, electrical components, electrical solid-state devices, etc., can solve the problems of power loss and lower display performance
Active Publication Date: 2018-07-03
APPLE INC
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- Description
- Claims
- Application Information
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Problems solved by technology
Data line capacitive loading can significantly degrade display performance and dissipate excessive power
Method used
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Embodiment Construction
[0023] An electronic device may include a display. The display can be used to display images to the user. figure 1 , 2 , 3 and 4 show electronic devices that may be provided with a display.
[0024] figure 1 It is shown how the electronic device 10 can take the form of a laptop computer having an upper housing 12A and a lower housing 12B with components such as a keyboard 16 and a touchpad 18B. Device 10 may have features that permit rotation of upper housing 12A relative to lower housing 12B in direction 22 about an axis of rotation 24 . Display 14 may be mounted in upper housing 12A. Upper housing 12A, which may sometimes be referred to as a display housing or cover, can be placed in a closed position by rotating upper housing 12A about axis of rotation 24 toward lower housing 12B.
[0025] figure 2 It is shown how the electronic device 10 can be a handheld device such as a cell phone, music player, gaming device, navigation unit or other compact device. In this conf...
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Abstract
Embodiments of the present invention relate to display circuits with increased transmittance and reduced coupling capacitance. A display can have a color filter layer and a thin film transistor layer. A layer of liquid crystal material may be located between the color filter layer and the thin film transistor (TFT) layer. The TFT layer may include thin film transistors formed on top of a glass substrate. A passivation layer may be formed on the thin film transistor layer. A first low-k dielectric layer may be formed over the passivation layer. A data line wiring structure may be formed on the first low-k dielectric layer. A second low-k dielectric layer may be formed over the first low-k dielectric layer. A common voltage electrode and associated storage capacitor may be formed over the second low-k dielectric layer. The first low-k dielectric layer and the second low-k dielectric layer may be formed of materials having substantially similar refractive indices to maximize backlight transmittance and may have appropriate thicknesses to minimize parasitic capacitive loading.
Description
[0001] This application claims priority to US Patent Application 14 / 153954, filed January 13, 2014, which is hereby incorporated by reference in its entirety. technical field [0002] The present application relates generally to electronic devices, and more particularly to electronic devices having displays. Background technique [0003] Electronic devices often include displays. For example, cellular telephones and portable computers often include displays for presenting information to users. [0004] Liquid crystal displays contain a layer of liquid crystal material. A display pixel in a liquid crystal display includes a thin film transistor and electrodes for applying an electric field to the thin film transistor. The strength of the electric field in the display pixel controls the polarization state of the liquid crystal material and thereby adjusts the brightness of the display pixel. [0005] In a conventional liquid crystal display, display pixel thin film transist...
Claims
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IPC IPC(8): G02F1/1362G02F1/1368H01L27/12
CPCG02F1/1362G02F1/136213H01L27/1214G02F1/133345G02F1/133502G02F1/136227G02F2201/40G02F2202/42G02F1/13606G02F1/13685G02F1/1368H01L27/124H01L27/1255H01L27/1259
Inventor 野津大辅山形裕和大泽裕史林上智张世昌陈右铮
Owner APPLE INC