Electronic device, electronic timepiece, display control method, and storage medium
AssigneeCasio Computer Co., Ltd.
InventorEiji Yamakawa
Life of this patent
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Abstract
An electronic device includes: a TFT liquid crystal panel; a light source that emits light to be radiated onto a back face of the TFT liquid crystal panel; and a processor that generates a common signal to be input to a common electrode of the TFT liquid crystal panel. The processor generates the common signal so as to have a waveform that differs between when the light source is not lit and when the light source is lit.
Claims13
An electronic device, comprising:
- a TFT liquid crystal panel;
- a light source that emits light to be radiated onto a back face of the TFT liquid crystal panel;
- and
- a processor that generates a first common signal and causes the first common signal to be input to a common electrode of the TFT liquid crystal panel when the light source is lit, and that generates a second common signal and causes the second common signal to be input to the common electrode of the TFT liquid crystal panel when the light source is not lit,
- wherein when the light source is not lit, the waveform of the second common signal has a periodic oscillation at a frequency less than or equal to a first prescribed frequency for periodic voltage inversion control, and
- wherein a waveform of the first common signal is different from a waveform of the second common signal.
A display control method executed by an electronic device that includes a TFT liquid crystal panel and a light source that emits light to be radiated onto a back face of the TFT liquid crystal panel, the display control method comprising:
- generating a first common signal and inputting the first common signal to a common electrode of the TFT liquid crystal panel when the light source is lit;
- and
- generating a second common signal and inputting the second common signal to the common electrode of the TFT liquid crystal panel when the light source is not lit,
- wherein when the light source is not lit, the waveform of the second common signal has a periodic oscillation at a frequency less than or equal to a first prescribed frequency for periodic voltage inversion control, and
- wherein a waveform of the first common signal is different from a waveform of the second common signal.
A computer-readable non-transitory storage medium having stored thereon a program to be executable by a processor of an electronic device that includes a TFT liquid crystal panel and a light source that emits light to be radiated onto a back face of the TFT liquid crystal panel, the program causing the processor to perform the following:
- generating a first common signal and inputting the first common signal to a common electrode of the TFT liquid crystal panel when the light source is lit;
- and
- generating a second common signal and inputting the second common signal to the common electrode of the TFT liquid crystal panel when the light source is not lit,
- wherein when the light source is not lit, the waveform of the second common signal has a periodic oscillation at a frequency less than or equal to a first prescribed frequency for periodic voltage inversion control, and
- wherein a waveform of the first common signal is different from a waveform of the second common signal.
Dependencies are inferred from the claim text.