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<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic concept/concept topic concept" role="article" aria-labelledby="ariaid-title1"><span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" href="http://172.16.35.88/tasks/jdssno1uvvbf2mltu9kb9v3if05d5gopuakboe8hlud18rma/edit/F:/aicdita/aicdita-cn/topics/sdk/display/display_faq_screen.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">调屏常见问题</h1><div class="date inPage">15 Jan 2024</div><div style="color: gray;">
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Read time: 1 minute(s)
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</div><div class="- topic/body concept/conbody body conbody"><section class="- topic/section section" id="concept_smb_cl3_pzb__section_dch_llg_d1c" data-ofbid="concept_smb_cl3_pzb__section_dch_llg_d1c"><h2 class="- topic/title title sectiontitle">PRGB 接口屏</h2>
|
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<div class="- topic/p p" data-ofbid="d267543e29__20250121171735">
|
||
<ul class="- topic/ul ul" id="concept_smb_cl3_pzb__ul_bqh_mlg_d1c" data-ofbid="concept_smb_cl3_pzb__ul_bqh_mlg_d1c"><li class="- topic/li li" data-ofbid="d267543e32__20250121171735"><strong class="+ topic/ph hi-d/b ph b">现象一：黑屏</strong><ol class="- topic/ol ol" id="concept_smb_cl3_pzb__ol_qc4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__ol_qc4_rkg_d1c"><li class="- topic/li li" data-ofbid="d267543e36__20250121171735">检查背光是否已亮</li><li class="- topic/li li" data-ofbid="d267543e38__20250121171735">排除 1 后确定屏规格书是 SYNC 模式还是 DE 模式，检查硬件电路相关控制信号是否按照屏规格书要求完成上下拉</li><li class="- topic/li li" data-ofbid="d267543e40__20250121171735">排除 1、2 后，测量 pixelclk 是否符合屏规格要求，pixelclk 计算公式如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_smb_cl3_pzb__codeblock_z2s_zc4_f1c" data-ofbid="concept_smb_cl3_pzb__codeblock_z2s_zc4_f1c">pixelclk = (hactive + hback-porch + hfront-porch + hsync-len)
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* (vactive + vback-porch + vfront-porch + vsync-len) * 帧率
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||
|
||
时钟频率 = 有效+消隐的总时间 * 帧率</pre></li></ol></li><li class="- topic/li li" data-ofbid="d267543e44__20250121171735"><strong class="+ topic/ph hi-d/b ph b">现象二:花屏</strong><ol class="- topic/ol ol" id="concept_smb_cl3_pzb__ol_tc4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__ol_tc4_rkg_d1c"><li class="- topic/li li" data-ofbid="d267543e48__20250121171735">调整 pixelclk 频率</li><li class="- topic/li li" data-ofbid="d267543e50__20250121171735">调整 pixelclk 相位</li><li class="- topic/li li" data-ofbid="d267543e52__20250121171735">调整消隐区参数，主要是行方向消隐区</li></ol><div class="- topic/note note note note_note" id="concept_smb_cl3_pzb__note_srj_4lg_d1c" data-ofbid="concept_smb_cl3_pzb__note_srj_4lg_d1c"><span class="note__title">注：</span>
|
||
<p class="- topic/p p" data-ofbid="d267543e56__20250121171735">如果图像显示存在斑点，在颜色渐变区域尤为明显，优先调整 pixelclk 时钟输出相位，RGB 接口支持 0, 90, 180, 270
|
||
四个相位。</p>
|
||
</div><div class="- topic/p p" data-ofbid="d267543e59__20250121171735">pixelclk 时钟相位对应 <span class="+ topic/ph sw-d/filepath ph filepath">board.dts</span>
|
||
参数<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_smb_cl3_pzb__codeblock_o4p_4lg_d1c" data-ofbid="concept_smb_cl3_pzb__codeblock_o4p_4lg_d1c">panel_rgb {
|
||
...
|
||
clock-phase = <DEGREE_<span class="hl-number">0</span>>;
|
||
...
|
||
}</pre></div></li><li class="- topic/li li" data-ofbid="d267543e66__20250121171735"><strong class="+ topic/ph hi-d/b ph b">现象三:起始位置错误</strong><ol class="- topic/ol ol" id="concept_smb_cl3_pzb__ol_xc4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__ol_xc4_rkg_d1c"><li class="- topic/li li" data-ofbid="d267543e70__20250121171735">调整 pixelclk 频率</li><li class="- topic/li li" data-ofbid="d267543e72__20250121171735">调整 pixelclk 相位</li><li class="- topic/li li" data-ofbid="d267543e74__20250121171735">调整消隐区参数，主要是行方向消隐区</li></ol></li><li class="- topic/li li" data-ofbid="d267543e76__20250121171735"><strong class="+ topic/ph hi-d/b ph b">现象四:闪烁</strong><ul class="- topic/ul ul" id="concept_smb_cl3_pzb__ol_yc4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__ol_yc4_rkg_d1c"><li class="- topic/li li" data-ofbid="d267543e80__20250121171735">增大 pixelclk 频率，提高帧率</li></ul></li></ul>
|
||
</div>
|
||
</section><section class="- topic/section section" id="concept_smb_cl3_pzb__section_sc4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__section_sc4_rkg_d1c"><h2 class="- topic/title title sectiontitle">LVDS 接口屏</h2>
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||
<ul class="- topic/ul ul" id="concept_smb_cl3_pzb__ul_ks3_tlg_d1c" data-ofbid="concept_smb_cl3_pzb__ul_ks3_tlg_d1c"><li class="- topic/li li" data-ofbid="d267543e90__20250121171735">现象一：黑屏<ol class="- topic/ol ol" id="concept_smb_cl3_pzb__ol_zc4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__ol_zc4_rkg_d1c"><li class="- topic/li li" data-ofbid="d267543e93__20250121171735">检查背光是否已亮</li><li class="- topic/li li" data-ofbid="d267543e95__20250121171735">排除 1 后，检查 LVDS 通道是否连接正确，检查硬件电路相关控制信号是否按照屏规格书要求完成上下拉，检查屏规格书是 VESA 模式还是 JEIDA 模式</li><li class="- topic/li li" data-ofbid="d267543e97__20250121171735">排除 1、2 后，测量 pixelclk 是否符合屏规格要求，pixelclk 计算公式 vactive*hactive*60/(0.8)，其中系数 60 为帧率，系数 0.8 为消隐区系数;LVDS 接口中有一对时钟差分信号 CK，若为单通道，则实测 pixelclk=7ck;若为双通道，则实测 pixelclk=3.5ck;</li></ol></li><li class="- topic/li li" data-ofbid="d267543e99__20250121171735"><strong class="+ topic/ph hi-d/b ph b">现象二:花屏</strong><ol class="- topic/ol ol" id="concept_smb_cl3_pzb__ol_ad4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__ol_ad4_rkg_d1c"><li class="- topic/li li" data-ofbid="d267543e103__20250121171735">调整 pixelclk 频率</li><li class="- topic/li li" data-ofbid="d267543e105__20250121171735">调整消隐区参数，主要是行方向消隐区</li></ol></li><li class="- topic/li li" data-ofbid="d267543e107__20250121171735"><strong class="+ topic/ph hi-d/b ph b">现象三:起始位置错误</strong><ol class="- topic/ol ol" id="concept_smb_cl3_pzb__ol_bd4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__ol_bd4_rkg_d1c"><li class="- topic/li li" data-ofbid="d267543e111__20250121171735">调整 pixelclk 频率</li><li class="- topic/li li" data-ofbid="d267543e113__20250121171735">调整消隐区参数，主要是行方向消隐区</li></ol></li><li class="- topic/li li" data-ofbid="d267543e115__20250121171735"><strong class="+ topic/ph hi-d/b ph b">现象四:闪烁</strong><ul class="- topic/ul ul" id="concept_smb_cl3_pzb__ol_cd4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__ol_cd4_rkg_d1c"><li class="- topic/li li" data-ofbid="d267543e119__20250121171735">增大 pixelclk 频率，提高帧率</li></ul></li></ul>
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||
</section><section class="- topic/section section" id="concept_smb_cl3_pzb__section_kf1_wlg_d1c" data-ofbid="concept_smb_cl3_pzb__section_kf1_wlg_d1c"><h2 class="- topic/title title sectiontitle">DSI 接口屏</h2>
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<div class="- topic/p p" data-ofbid="d267543e127__20250121171735">
|
||
<ul class="- topic/ul ul" id="concept_smb_cl3_pzb__ul_ssv_wlg_d1c" data-ofbid="concept_smb_cl3_pzb__ul_ssv_wlg_d1c"><li class="- topic/li li" data-ofbid="d267543e130__20250121171735"><strong class="+ topic/ph hi-d/b ph b">现象一：黑屏</strong><ol class="- topic/ol ol" id="concept_smb_cl3_pzb__ol_dd4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__ol_dd4_rkg_d1c"><li class="- topic/li li" data-ofbid="d267543e134__20250121171735">检查背光是否已亮</li><li class="- topic/li li" data-ofbid="d267543e136__20250121171735">排除 1 后，检查硬件电路相关控制信号是否按照屏规格书要求完成上下拉。检查与屏的连接是否成功，通常使用读屏驱动 ID 检查。检查初始化流程是否正确，检查屏规格书是 Commad 模式还是 Video 模式</li><li class="- topic/li li" data-ofbid="d267543e138__20250121171735">排除 1、2 后，测量 pixelclk 是否符合屏规格要求，pixelclk 计算公式 vactive*hactive*60/(0.8)，其中系数 60 为帧率，系数 0.8 为消隐区系数</li></ol></li><li class="- topic/li li" data-ofbid="d267543e140__20250121171735"><strong class="+ topic/ph hi-d/b ph b">现象二:花屏</strong><ol class="- topic/ol ol" id="concept_smb_cl3_pzb__ol_ed4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__ol_ed4_rkg_d1c"><li class="- topic/li li" data-ofbid="d267543e144__20250121171735">检查屏数据格式，检查数据 lane 数量</li><li class="- topic/li li" data-ofbid="d267543e146__20250121171735">调整 pixelclk 频率</li><li class="- topic/li li" data-ofbid="d267543e148__20250121171735">调整消隐区参数，主要是行方向消隐区</li></ol></li><li class="- topic/li li" data-ofbid="d267543e150__20250121171735"><strong class="+ topic/ph hi-d/b ph b">现象三:起始位置错误</strong><ol class="- topic/ol ol" id="concept_smb_cl3_pzb__ol_fd4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__ol_fd4_rkg_d1c"><li class="- topic/li li" data-ofbid="d267543e154__20250121171735">调整 pixelclk 频率</li><li class="- topic/li li" data-ofbid="d267543e156__20250121171735">调整消隐区参数，主要是行方向消隐区</li></ol></li><li class="- topic/li li" data-ofbid="d267543e158__20250121171735"><strong class="+ topic/ph hi-d/b ph b">现象四:闪烁</strong><ul class="- topic/ul ul" id="concept_smb_cl3_pzb__ol_gd4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__ol_gd4_rkg_d1c"><li class="- topic/li li" data-ofbid="d267543e162__20250121171735">增大 pixelclk 频率，提高帧率</li></ul></li></ul>
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<div class=" wh_topic_toc "><div class="wh_topic_label">在本页上</div><ul><li class="section-item"><div class="section-title"><a href="#concept_smb_cl3_pzb__section_dch_llg_d1c" data-tocid="concept_smb_cl3_pzb__section_dch_llg_d1c">PRGB 接口屏</a></div></li><li class="section-item"><div class="section-title"><a href="#concept_smb_cl3_pzb__section_sc4_rkg_d1c" data-tocid="concept_smb_cl3_pzb__section_sc4_rkg_d1c">LVDS 接口屏</a></div></li><li class="section-item"><div class="section-title"><a href="#concept_smb_cl3_pzb__section_kf1_wlg_d1c" data-tocid="concept_smb_cl3_pzb__section_kf1_wlg_d1c">DSI 接口屏</a></div></li></ul></div>
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