Electro-optical device, driving method therefor, and electronic apparatus

By dynamically adjusting the sub-frame number and pixel brightness level of the liquid crystal device, the cost and power problems of grayscale correction under temperature changes are solved, and a miniaturized and low-cost electro-optical device is realized, which is suitable for grayscale correction under temperature changes. .

Inactive Publication Date: 2010-11-17
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] As described above, in the method of preparing a data table for each temperature in order to perform gradation correction against temperature changes, a large-capacity memory is required, and if it is a small-capacity memory, a plurality of memories are required, which leads to power consumption, mounting area and increase in cost
In addition, since the adjustment time increases by preparing multiple data tables, it is not suitable for miniaturization and cost reduction
[0009]On the other hand, even in the case of using Peltier elements, because of the high price and high power consumption of Peltier elements, it is not suitable for cost reduction and Low power consumption
In addition, in the case of using a fan, the fan itself needs to be enlarged in order to increase the air volume, which is a factor of cost increase and enlargement of the housing.
Furthermore, it is necessary to install a function to suppress the generation of sound or dust caused by the rotation of the fan, and it is not suitable for cost reduction.

Method used

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Embodiment Construction

[0039] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

[0040] figure 1 It is a block diagram showing the electro-optical device related to this embodiment. As an electro-optical device according to this embodiment, a liquid crystal device 100 is exemplified and described in which an element substrate and a counter substrate are bonded with a certain gap between them, and a liquid crystal as an electro-optical material is sandwiched between the gap.

[0041]Furthermore, the liquid crystal device 100 according to this embodiment adopts digital time division driving (digital time division driving) as a gray scale display method, and adopts common inversion driving (common inversion driving) as an AC driving method, wherein, The digital time-division driving is performed by dividing a frame into a plurality of subframes and performing gray scale display with the brightness level of pixels in each subframe as at least the fi...

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Abstract

An electro-optical device includes a temperature detecting unit that detects temperature, wherein the electro-optical device sets a number of sub-frames of plural sub-frames included in one frame according to the temperature detected by the temperature detecting unit and sets a luminance level of pixels in each of the plural sub-frames to at least a first level or a second level to perform gradation display.

Description

technical field [0001] Several aspects related to the present invention relate to electro-optical devices, driving methods thereof, electronic devices, and the like. Background technique [0002] In a liquid crystal device which is one form of an electro-optical device, the liquid crystal characteristics (response speed, etc.) are temperature-dependent, so the voltage applied to the liquid crystal required to express the same gradation differs depending on the temperature. Therefore, conventionally, a data table is prepared in advance for each temperature. This data table shows the correspondence between the gray scale and the liquid crystal application voltage required to express the gray scale. In the data table corresponding to the temperature detected by the sensor, the voltage applied to the liquid crystal suitable for the temperature is selected, so as to correct the gray scale for the temperature change. [0003] In addition, as a method of gradation correction again...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G09G3/36
CPCG09G2320/041G09G3/2025G09G3/3648
OwnerSEIKO EPSON CORP